WBRZ http://www.wbrz.com/ WBRZ Weather Weather en-us Copyright 2014, WBRZ. All Rights Reserved. Feed content is not avaialble for commercial use. () () Mon, 28 Jul 2014 18:07:44 GMT Synapse CMS 10 WBRZ http://www.wbrz.com/ 144 25 Cold front arrives tonight http://www.wbrz.com/news/cold-front-arrives-tonight/ http://www.wbrz.com/news/cold-front-arrives-tonight/ Weather Mon, 28 Jul 2014 3:51:55 AM Meteorologist Josh Eachus Cold front arrives tonight

Another partly sunny, hot and humid day is expected across Southeastern Louisiana and Southern Mississippi. Look for high temperatures to reach the mid 90s with high humidity pushing afternoon feels-like temperatures over 100° again.

By the afternoon, showers and thunderstorms will develop from north to south along a well-advertised cold front approaching the region. These storms could be strong or severe with gusty winds, heavy rain and frequent lightning. The most threatening weather will be north of I-10 and occur between 12 p.m. - 8 p.m. Some weaker thundershowers will continue overnight as the front crosses the area.

Humidity will not exit immediately, so it will be fairly muggy with a low near 70°.

Humidity will lessen Tuesday afternoon promoting conditions more comfortable by July standards for Wednesday and part of Thursday.

 


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Hot and humid this weekend http://www.wbrz.com/news/hot-and-humid-this-weekend/ http://www.wbrz.com/news/hot-and-humid-this-weekend/ Weather Fri, 25 Jul 2014 3:29:43 AM Meteorologist Josh Eachus Hot and humid this weekend

Blue skies this morning will give way to a few clouds in the afternoon's peak heat. A stray shower or thunderstorm may develop. Thermometers will climb to the lower 90s with plenty of humidity as well.

Tonight will be a peaceful if not sticky one, with lows in the mid 70s.

Have sunglasses and sunscreen ready to go this weekend, and if possible, stay close to a pool or air conditioning. Both weekend days will be hazy, hot and humid with thermometers peaking in the mid 90s and healthy humidity levels. Afternoon feels-like readings could exceed 100° at times. Only an isolated shower will be possible late either afternoon, and most probable in coastal locations.


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Heat before relief http://www.wbrz.com/news/heat-before-relief/ http://www.wbrz.com/news/heat-before-relief/ Weather Thu, 24 Jul 2014 3:38:30 AM Meteorologist Josh Eachus Heat before relief

Showers and thunderstorms will become less numerous today compared to Tuesday and Wednesday, though some isolated activity is still expected. In the meantime, skies will continue to feature a lot of blue early and some clouds by afternoon. Thermometers will warm into the lower 90s again.

Tonight, look for spotty showers to diminish, skies to clear and temperatures to be a touch warmer than Thursday Morning.

Friday through Sunday will all flirt with 95° for afternoon highs meaning the humidity will produce maximum feels-like temperatures in the low 100s.

Into next week, a cold front will approach the region from the north. Amazingly, like last week, it appears this one will also squirm towards the Gulf Coast potentially offering a little relief from the humidity by mid-week. We'll keep you posted.

 


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Scattered action again http://www.wbrz.com/news/scattered-action-again/ http://www.wbrz.com/news/scattered-action-again/ Weather Wed, 23 Jul 2014 3:49:24 AM Meteorologist Josh Eachus Scattered action again

Tuesday's forecast for scattered showers and thunderstorms verified well. Rainfall totals over the last 24-hours depict measurable precipitation for 30-40% of the viewing area. The issued rain chance on Tuesday Morning was 40%-- indicating that we were expecting about 40% of the viewing area to find measurable rainfall. For much more on PoPs and rain chances, click here.

Like Tuesday, showers and thunderstorms will develop in the afternoon and affect about half of our viewing area through early evening. The scattered action could produce some locally heavy downpours and frequent lightning, but no storms will be severe, nor should they be long-lasting. Prior to the showers, skies will be partly sunny with thermometers approaching the low 90s.

The nighttime hours will lead to a quick drop-off in precipitation we'll feel a muggy low near 72°.


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Pop-up T-Showers Return http://www.wbrz.com/news/pop-up-t-showers-return/ http://www.wbrz.com/news/pop-up-t-showers-return/ Weather Tue, 22 Jul 2014 3:48:02 AM Meteorologist Josh Eachus Pop-up T-Showers Return

Unlike Monday, showers and thunderstorms that pop-up will not be limited to the coast. Scattered action is anticipated around the viewing area; about 30-50% of us will record measurable rainfall. Look for storms to fire up during the afternoon. Skies will be partly sunny otherwise with a humid high in the low 90s.

This would be a good time to mention the meanings of precipitation forecast wording and PoPs (probability of precipitation). The numbers indicate the percent chance any given point in the viewing area will have measurable rainfall. More simply put, it is the percent chance that you will see rain at your home. The words isolated, scattered and likely help to reinforce the percentages issued with any forecast.

Isolated (1-30%) | Scattered (31-60%) | Likely (61-99%)

If a forecast is accurate, when looking at the daily rainfall accumulations, the issued PoP should be close the spatial coverage of measurable precipitation in the viewing area.

***REMEMBER: A PoP IS NOT the amount of time it will rain during the day, NOR is it an indicator of how much rain will fall.

The nighttime hours will mean diminished showers and muggy temperatures-low 73°.


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Coastal Showers http://www.wbrz.com/news/coastal-showers/ http://www.wbrz.com/news/coastal-showers/ Weather Mon, 21 Jul 2014 3:47:53 AM Meteorologist Josh Eachus Coastal Showers

Skies will be partly sunny for much of the day. Any isolated shower and storm activity is expected to keep south of I-10, and really only be prevalent near the coast. A very humid day is ahead as high temperatures warm to the 90° mark.

Look for mostly clear skies tonight with sticky lows in the mid 70s.

 

 


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Flash Flood Watch into the evening http://www.wbrz.com/news/flash-flood-watch-into-the-evening/ http://www.wbrz.com/news/flash-flood-watch-into-the-evening/ Weather Fri, 18 Jul 2014 10:30:41 AM Flash Flood Watch into the evening

Heavy rainfall will last through the day and more rain is expected this weekend.

Localized heavy rain has created problematic road conditions for drivers this morning. Forecast models indicate that scattered showers and thunderstorms will continue to develop and impact the area through Friday evening, though with a few breaks between each batch.
Saturday is looking a little less aggressive, but scattered showers are still in the forecast. It is expected that most locations will see measurable rainfall, with many spots receiving a couple rounds of showers and storms.

Rainfall totals will be on the order of 1-5" through Sunday.

Thanks to an upper level low moving into Louisiana, a strong transport of moisture into Southern Louisiana is fueling persistent rains. An anomalously moist atmosphere is bringing the region a constant bombardment from heavy pockets of rainfall over the same areas. Rainfall rates have reached higher than 3" per hour in some spots. The greatest instability is in the southern half of the viewing area and this instability is what is helping support the highest rainfall rates. Heavy rains from this morning have saturated the ground already and the threat for flooding is a real possibility as we've already seen a few flood warnings issued across the state.

Stay tuned on social media and on WBRZ for the latest updates.

On Facebook: Meteorologist Robert Gauthreaux III, Meteorologist Josh Eachus

On Twitter: @RG3wbrz, @Josh_Eachus


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Wet and muggy http://www.wbrz.com/news/wet-and-muggy/ http://www.wbrz.com/news/wet-and-muggy/ Weather Fri, 18 Jul 2014 3:58:23 AM Meteorologist Robert Gauthreaux III Wet and muggy

A surface low pressure system advancing eastward out of Texas and into North Louisiana will kick off a round of showers and thunderstorms in our area over the next few days. Counterclockwise wind flow around this surface low will mean southerly winds will once again be able to transport moisture into the region from the Gulf of Mexico. An upper level wave associated with this low will provide a lifting mechanism for the moist, surface air. As a southwest - northeast oriented front sits to the west with a parallel jet stream aloft, a slow-moving batch of rain and thunderstorms is anticipated for Friday. At the leading edge of precipitation, there could be some gusty wind. As the rain begins, the threat turns to heavy, persistent downpours. With a saturated atmospheric column of moisture and weak steering winds, the storms will likely be slow-movers and efficient rain-makers. A few rounds of showers and storms will pass through the area by Saturday Night and by then anywhere from 1-4" of rain may fall area-wide. Locations farther to the northwest of the viewing area stand the greatest chance of heavy rain. As the low slowly pulls into Kentucky by Sunday, a depression of cool air will be left aloft, which will enhance thunderstorm activity on Sunday. These showers and storms should be more of the summer-time, air mass variety and are not expected to be as potent as the Friday and Saturday round. It appears as though this regime will stick into next week.


Today & Tonight: The daytime hours will stay mostly cloudy with periods of rain and thunderstorms. Some of the storms could produce gusty wind and torrential downpours, along with frequent lightning. Batches of rain along with the clouds could make the forecast high of 86° more of an optimistic prediction. Where no breaks of sun occur, low to mid 80s may be all that is possible. It will be muggy however. Tonight, shower and storm strength should back off a bit, but will remain scattered about the area. It will be a sticky night with a low temperature in the low 70s. We could see the rain ease back a bit in the afternoon. Some sunshine may peek through as well.

Wet weekend: If you must pick one weekend day to accomplish outdoor activity-good luck! Scattered showers and thunderstorms are expected through Sunday. Most backyards will see measurable rainfall, likely both days. The is a better chance for some breaks of sun on Sunday, but off and on showers may make it a hide-and-seek game with the outdoors. Highs will be in the upper 80s while lows are in the low 70s.

The Tropics: No tropical development is expected in the Gulf of Mexico or the remainder of the Atlantic Basin over the next 5 days.

 

On Facebook: Meteorologist Robert Gauthreaux III

On Twitter: @RG3wbrz

 

~RG3


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Wet Weekend Likely http://www.wbrz.com/news/wet-weekend-likely/ http://www.wbrz.com/news/wet-weekend-likely/ Weather Thu, 17 Jul 2014 9:05:41 AM Meteorologist Josh Eachus Wet Weekend Likely

Beginning Friday, the Baton Rouge area will run a risk for heavy rainfall that is expected to carry through the weekend.

A round of showers and thunderstorms is expected to track across the region between Friday Morning and Friday Afternoon. The initial line of storms could produce gusty winds, frequent lightning and heavy downpours. Beyond this, forecast models indicate that scattered showers and thunderstorms will continue to develop and impact the area through Friday Evening, though with a few breaks in between each batch.

Saturday will be just as unsettled and perhaps, just as wet. It is expected that all locations will see measurable rainfall, with many spots receiving a couple rounds of showers and storms.

Rainfall totals will be on the order of 1-4" through Sunday with areas north of I-10 and west of I-12 most likely receiving the higher end amounts.

Though for the month of July, there is currently a deficit of just over one inch, the incoming rain would add to what has been a slightly wetter than usual year thus far. After starting off relatively dry through April, and needing rain, there has been no lack of liquid since then. For the year, Baton Rouge has received 37.60" of rain, 3.68" above normal to this point in the year. Many locations in Ascension and Assumption Parishes especially, have seen much more.

METEOROLOGICAL DISCUSSION: A surface low pressure system advancing eastward out of Texas and into North Louisiana will kick off a round of showers and thunderstorms in our area over the next few days. Counterclockwise wind flow around this surface low will mean southerly winds will once again be able to transport moisture into the region from the Gulf of Mexico. An upper level wave associated with this low will provide a lifting mechanism for the moist, surface air. As a southwest - northeast oriented front sits to the west with a parallel jet stream aloft, a slow-moving batch of rain and thunderstorms is anticipated for Friday. At the leading edge of precipitation, there could be some gusty wind. As the rain begins, the threat turns to heavy, persistent downpours. With a saturated atmospheric column of moisture and weak steering winds, the storms will likely be slow-movers and efficient rain-makers. A few rounds of showers and storms will pass through the area by Saturday Night and by then anywhere from 1-4" of rain may fall area-wide. Locations farther to the northwest of the viewing area stand the greatest chance of heavy rain. As the low slowly pulls into Kentucky by Sunday, a depression of cool air will be left aloft, which will enhance thunderstorm activity on Sunday. These showers and storms should be more of the summer-time, air mass variety and are not expected to be as potent as the Friday and Saturday round. It appears as though this regime will stick into next week.

You can get forecasts from Meteorologist Josh Eachus weekdays on 2une-In from 5-7am and News 2 at Noon from 12-1pm. Additionally, you can get the fastest and latest forecasts and weather news by checking in with wbrz.com/weather, liking Josh on Facebook and following him on Twitter.


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Still fairly dry air http://www.wbrz.com/news/still-fairly-dry-air/ http://www.wbrz.com/news/still-fairly-dry-air/ Weather Thu, 17 Jul 2014 3:04:26 AM Meteorologist Josh Eachus Still fairly dry air

The relatively comfortable air mass, by July standards, will remain in place through today.

Look for another day featuring abundant afternoon sunshine mixed with a few puffy cumulus clouds. With the northerly winds shifting southeasterly by afternoon, highs will nudge a touch higher than Wednesday, to near 90°. Humidity will remain markedly low by July standards.

Dew points will creep up during the overnight hours and on Friday you will once again wake up to "July" as lows keep in the lower 70s. There may be a few clouds and a spotty shower isn't impossible. Most rain will hold off until Friday though.

 

 


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Champion of the Elements http://www.wbrz.com/news/champion-of-the-elements/ http://www.wbrz.com/news/champion-of-the-elements/ Weather Wed, 16 Jul 2014 7:49:22 AM Meteorologist Josh Eachus Champion of the Elements

The Open Championship-it is the oldest of golf's four professional major tournaments and the pride of the United Kingdom.

Since 1860, the biggest names and strongest competitors from the world of golf converge on a remarkably rugged yet astonishingly appealing tract of land in hopes of hoisting the Claret Jug. But even before the first tee shot at Old Prestwick Golf Club (site of the first Open Championship), temperamental maritime weather has been blowing ashore and making golf in the "Old Country" a true test of will. Most traditional links-style courses that host The Open are quite exposed to the elements, due to their proximity to the coast. Wind, rain and even thunderstorms are common, accentuating the difficulties of courses marred with deep pot-bunkers and thick fescue. On the less common pleasant days, a constant breeze and the sun combine to dry out playing surfaces, making for hard and fast courses.

(AUTHOR'S NOTE: a seamless overlap of my two passions-perhaps no other tournament is more intriguing.)

This week, participants vying for the title "Champion Golfer of the Year" head to Merseyside, where Hoylake at the Royal Liverpool Golf Club hosts the 2014 Open.
And just as in year's past, golf's pace-setters along with hundreds of thousands of patrons will have to battle undesirable playing and/or spectating conditions to emerge on Sunday.

The 4-day forecast calls for a mixed-bag of conditions. The tournament will begin on Thursday and close on Sunday in weather relatively benign by Open standards. Partly sunny skies and lighter winds of 5-10mph are anticipated. Friday and Saturday offer a more complicating platter of playing conditions, however. Prior to a storm, golfers will be met with northwesterly winds of nearly 20mph on Friday. By Saturday, that storm will introduce rain to supplement the already windy setting. The weather system will also drop temperatures out of the middle 70s early in the week, to the low 60s by tournament's end.

You can get golf forecasts from Meteorologist Josh Eachus weekdays on 2une-In from 5-7am and News 2 at Noon from 12-1pm. Additionally, you can get the fastest and latest forecasts and weather news by checking in with wbrz.com/weather, liking Josh on Facebook and following him on Twitter.


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Unseasonable July Day http://www.wbrz.com/news/unseasonable-july-day/ http://www.wbrz.com/news/unseasonable-july-day/ Weather Wed, 16 Jul 2014 3:47:36 AM Meteorologist Josh Eachus Unseasonable July Day

Enjoy what will shape up to be about as fine a weather day one can find in South Louisiana during the month of July. We'll see mostly sunny skies, a warm afternoon in the upper 80s and low humidity by mid-summer standards.

The overnight hours are expected to be peaceful and cooler than average with a morning dip into the middle and upper 60s. The record low for tomorrow morning is 64°.

 


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An uncommon feeling for July http://www.wbrz.com/news/an-uncommon-feeling-for-july/ http://www.wbrz.com/news/an-uncommon-feeling-for-july/ Weather Mon, 14 Jul 2014 10:33:25 AM Meteorologist Josh Eachus An uncommon feeling for July

A weather feature often reserved for only the winter months in South Louisiana will make a rare appearance on Tuesday. As a result, Wednesday's weather in the Baton Rouge area will turn out as pleasant as it gets during the month of July in South Louisiana.

A cold front is expected to pass through the state, offering a slight break in the heat and humidity, a welcome gift this time of year. By Wednesday Morning, most locations will dip into the upper 60s and the afternoon hours will find highs in the upper 80s with mostly sunny skies and relatively low humidity! Wednesday Night may find lows as cool as the lower 60s in Southern Mississippi and middle 60s in the Baton Rouge area.

But just how "out of the ordinary" is this?

First, when you consider the average range in temperatures for Baton Rouge during the month of July, it is easy to see that ANY variation is indeed uncommon. The average high and low for July 1 is 92° and 73° while for the end of the month is virtually the same at 92° and 74°. Records show very little range as well with the warmest reading ever recorded in Baton Rouge during July at 103° and the coolest at 59°, occurring twice in history.

Second, since 2003, July has averaged 25 days in which the high temperature has eclipsed 90°. The fewest days in July over 90° in the last 11 years came in 2007 when there were just 20. So far this July, there have already been two days that have not reached 90° and up to five more could accumulate this week alone.

Third, and most telling, is the low temperature statistics over the last 11 years. Since 2003, July has average only two days per month where the low was less than or equal to 69°. That average is inflated by 6 nights in the 60s in 2013. More than half of those years failed to record a temperature below 70°. Of course, the reason lows don't often escape the 70s is Southeastern Louisiana's close proximity to the Gulf of Mexico. Very warm in the summer, the water provides a constant marine influence to the local weather keeping moist or humid air through the month. Temperatures can never dip below the dew points (the temperature at which air is saturated, also the temperature at which air condenses into clouds) and South Louisiana dew points rarely leave the 70s in July.

So yes, not only could the area feel an unseasonable, albeit short-lived stretch of relatively cooler temperatures, but an easing break in humidity.

By Thursday, the possibility of showers and storms will return during the afternoon hours with the best chances south of I-10. In fact, unsettled weather is pegged to stay at least through the first half of the weekend. Humidity will slowly increase as well.

Remember, you can get forecasts from Meteorologist Josh Eachus weekdays on 2une-In from 5-7am and News 2 at Noon from 12-1pm. Additionally, you can get the fastest and latest forecasts and weather news by checking in with wbrz.com/weather, liking Josh on Facebook and following him on Twitter.


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Starting similar http://www.wbrz.com/news/starting-similar/ http://www.wbrz.com/news/starting-similar/ Weather Mon, 14 Jul 2014 3:38:40 AM Meteorologist Josh Eachus Starting similar

Not unlike last week or the weekend, today will warm quickly with early sunshine before the hot, humid and unstable air bubbles into clouds that could pop out a few showers and thunderstorms from the lunch hour into the late afternoon. Top out temperatures will be in the lower 90s.

Activity will diminish tonight leaving partly cloudy skies and a muggy low in the mid 70s.

 

 


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Storms stick http://www.wbrz.com/news/storms-stick/ http://www.wbrz.com/news/storms-stick/ Weather Fri, 11 Jul 2014 3:30:04 AM Meteorologist Josh Eachus Storms stick

A change to the running forecast-as shower and storm chances appear to remain elevated today.

Look for a quick warm up today as sunshine will dominate early. Just enough cool air lingers aloft for clouds to bubble up and produce scattered showers and thunderstorms. As has been the case all week long, storms should stay sub-severe, but could still create heavy rain, gusty winds and frequent lightning. Storms will begin to develop around the lunch hour and drift to the southwest. It will be a steamy one with highs in the low to mid 90s.

Overnight will be quiet and muggy with a low in the mid 70s.

As for the weekend... Hazy, hot and humid... a pop-up storm... highs in the mid 90s, feeling like over 100... lows in the mid 70s, feeling like a steam room. Summer in South Louisiana... what more can be said?


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Arthur gives birds an eye view http://www.wbrz.com/news/arthur-gives-birds-an-eye-view/ http://www.wbrz.com/news/arthur-gives-birds-an-eye-view/ Weather Thu, 10 Jul 2014 8:43:44 AM Meteorologist Josh Eachus Arthur gives birds an eye view

While the human impact of Hurricane Arthur could be pegged in the inconvenient category, for some sea-faring birds, Arthur was perhaps life-altering.

Meteorologists were perplexed by a radar capture of Hurricane Arthur revealing some clutter in an otherwise well-defined eye. Then came reports of birds showing up in odd places after the storm.

Ever since National Weather Service radar has been upgraded to dual-polarization technology, experts are able to analyze the difference in size between droplets scanned on a horizontal beam versus a vertical beam.

Since most droplets are nearly round, little difference is seen in the horizontal and vertical comparisons, on the order of 0 to 2db. However, in Arthur's eye, returns of 6 to 7db were on display.

The severe weather and radar research team at the University of Alabama at Huntsville looked over several such images from the early July tropical cyclone. Combining the ornithological reports with some common knowledge, scientists determined that only one thing could be showing up in that eye that is much wider than vertical-birds.

Through history, hurricanes have had a record of encapsulating birds in the fair-weather eye while violent winds repel them from flying through the eye-wall. As hurricanes can travel hundreds or thousands of miles, the birds are at the mercy of the storm's path and have been known to show up thousands of miles from their natural habitats.

There are already reports of Carolina and Florida based birds showing up in Nova Scotia.

You can get forecasts from Meteorologist Josh Eachus weekdays on 2une-In from 5-7am and News 2 at Noon from 12-1pm. Additionally, you can get the fastest and latest forecasts and weather news by checking in with wbrz.com/weather, liking Josh on Facebook and following him on Twitter.


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Thursday Thundershowers http://www.wbrz.com/news/thursday-thundershowers/ http://www.wbrz.com/news/thursday-thundershowers/ Weather Thu, 10 Jul 2014 3:27:53 AM Meteorologist Josh Eachus Thursday Thundershowers

Thursday should be the final afternoon in the current stretch of active weather where many backyards pick up measurable rain.

Showers and thunderstorms are likely, with partly sunny skies otherwise. Any storms will be capable of heavy rain, gusty winds and frequent lightning. Still, enough warmth of the sun will reach the surface to produce a top out temperature near 90°.

As has been the trend since Tuesday, shower and storm coverage will dissipate into the evening. Rain cooled air should drop thermometers back to the dew point readings in the low 70s-meaning it will remain muggy.

 

 


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Duty of Denver http://www.wbrz.com/news/duty-of-denver/ http://www.wbrz.com/news/duty-of-denver/ Weather Wed, 9 Jul 2014 9:46:16 AM Meteorologist Josh Eachus Duty of Denver

The 23rd most populated city in the United States has renewed a commitment to being an environmental leader amongst major metropolitan cities.

In late June, the City and County of Denver, Colorado, led by Denver's Department of Environmental Health, unveiled a 90-page plan of short, medium and long-term strategies aimed at adapting to climate change.

In 2007, the city was one of the first to set goals for reducing greenhouse gas emissions.

"While cities across the globe are all experiencing the impacts of climate change, every city is unique. We have a responsibility to protect our city and our way of life," says Denver Mayor Michael Hancock. "It is our goal that this adaptation plan will benefit current and future Denver residents by ensuring that Denver is resilient in the face of climate change."

A specialized committee within the city government identified key impacts to Denver based on compiled data. Included was the urban heat island effect-heat radiating off of asphalt and cranking utilities cause warmer temperatures then in surrounding countryside. Also projected is an increase in extreme weather events which project Denver to have 88 extreme heat days by mid-century versus the historical average of 9. Lastly the data pointed to a reduced snowpack and earlier snowmelt which will affect water availability.

Having identified the pertinent issues, the committee then developed the short, medium and long-range strategies to combat the potential problems. Those strategies include:

Expanding energy efficiency programs to enhance building comfort and save energy thus maintaining the longevity of the energy grid.

1.Updating building codes to ensure future buildings and renovations are more efficient and environmentally friendly.
2.Ensuring efficient use of water and protection of water quality by maximizing building efficiency, promoting water conservation and using green infrastructure.
3.Expanding a commitment to renewable energy which helped Denver become the first Solar Friendly Community in Colorado.
4.Maintaining the urban tree canopy which helps to offset the urban heat island effect.
5.Adding health and human services in extreme weather events, such as cooling centers.
6.Implementing a citywide Emergency Management System to track the progress of these strategies.

To learn more about Denver's plan, visit the city's web site.

You can get forecasts from Meteorologist Josh Eachus weekdays on 2une-In from 5-7am and News 2 at Noon from 12-1pm. Additionally, you can get the fastest and latest forecasts and weather news by checking in with wbrz.com/weather, liking Josh on Facebook and following him on Twitter.


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Repeating afternoon storms http://www.wbrz.com/news/repeating-afternoon-storms/ http://www.wbrz.com/news/repeating-afternoon-storms/ Weather Wed, 9 Jul 2014 3:30:31 AM Meteorologist Josh Eachus Repeating afternoon storms

Once again, showers and thunderstorms will be likely with more than 60% of the viewing area expected to receive measurable rain. In between showers, partly sunny skies will send thermometers into the lower 90s.

Activity will diminish at night with partly cloudy skies and muggy lows in the mid 70s.

 


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Peaks and valleys http://www.wbrz.com/news/peaks-and-valleys/ http://www.wbrz.com/news/peaks-and-valleys/ Weather Tue, 8 Jul 2014 9:12:58 AM Meteorologist Josh Eachus Peaks and valleys

Forecasters have announced to the point of redundancy that heat and humidity are two of the primary ingredients for shower and thunderstorm development. Living in South Louisiana, one must wonder then why it doesn't rain every single day from June through September.

Beyond heat and humidity, there is an overlying rule however, a much more subtle process that dictates whether or not showers and thunderstorms develop. As an ever evolving fluid, the atmosphere is always trending toward chaos. Thus when the atmosphere achieves a state of balance, it inevitably breaks down and the subsequent changes spark active weather.

From weather 101, a difference in temperature and moisture content from the surface to the upper levels can also be referred to as instability. As long as warmer, more humid air lies beneath relatively cooler and drier air, the atmosphere is unstable and air will have a tendency to rise. This is a process noted within your own home, as upper floors tend to be warmer than those beneath. Warmer air, rising into cooler air condenses, forming clouds and, if enough instability or external processes are at work, eventually cloud droplets will grow too large and fall as rain.

That being said, with warm and humid air at the surface, there are a few mechanisms that can create showers and storms.

1.With the presence of a frontal boundary, surface air is forced upward. This can happen even if a stable layer in the lower levels of the atmosphere prevents air from rising on its own. Think of a front like a wedge, nudging air into the sky.

2.An "upper-level disturbance" (also known as a wave or upper-low) can create a swirl in the upper level winds that acts as a scoop, pulling existing unstable air upward.

3.On a very hot and steamy day, the typical orientation of the atmosphere in which air cools with height, clouds, showers and storms can sometimes bubble up on their own if the temperature change with height is dramatic enough.

During summer in South Louisiana, with all active weather patterns typically left off to the north, fronts are rare, upper-level disturbances are few and the air is so warm that the lower levels of the atmosphere remain stable. So how does the region ever get rain during the summer?

We count on the previously noted break down in atmospheric balance to moisten our lawns and gardens. Such breakdowns are the peaks and valleys in the upper wind pattern, or ridges and troughs.

A ridge is a pocket of higher air pressure and thus warmer air aloft. Due a decreased temperature change with height, even on the hottest day, the atmosphere is capped and air cannot efficiently rise. With less rising air, we see fewer showers and have fewer clouds and as a result see more sunshine. Ridges lead to clearer, hotter and drier days. Ridges are like a lidded bottle of soda, even when shaken (unstable), with the cap on, nothing happens.

A trough is a pocket of lower air pressure and thus cooler air aloft. With a much steeper change in pressure from surface to sky, air can rise more freely. With more rising air, clouds are numerous and shower and storm development is common. Troughs lead to a stormier pattern with slightly cooler temperatures. Troughs are like a shaken (unstable) bottle of soda, with no lid on to stop them from bubbling up.

You can get forecasts from Meteorologist Josh Eachus weekdays on 2une-In from 5-7am and News 2 at Noon from 12-1pm. Additionally, you can get the fastest and latest forecasts and weather news by checking in with wbrz.com/weather, liking Josh on Facebook and following him on Twitter.


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