Baton Rouge, Louisiana
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Hot with isolated showers

1 year 3 months 1 week ago July 21, 2015 Jul 21, 2015 Tuesday, July 21 2015 July 21, 2015 5:51 AM in Weather
Source: WBRZ Weather
By: Meteorologist Josh Eachus

Heat will continue to capture weather headlines through the week while showers will be much tougher to find than they were on Monday.


Today and tonight: Sunshine will hit those thermometers early sending temperatures shooting through the 80s and back to the mid 90s by early afternoon. Skies will be partly sunny by then with a few clouds bubbling up and producing a shower or storm. Fewer areas will receive rain than did on Monday though. Overnight will be still and sticky with a low in the upper 70s.

Looking ahead: There once again may be a small uptick in rain chances on Wednesday before the pattern only allows isolated showers or less into the weekend. Though rain chances/coverage may differ a touch from day to day, temperatures will not. Look for highs in the mid 90s and lows in the upper 70s.


Forecast Discussion: A little surface weakness or trough stretching from North Carolina to the Northeastern Gulf of Mexico is all that is in place to stir up shower and storm activity through the week. A few differences from last week's setup though at least make afternoon showers a little better possibility. First, the additional moisture content with dew points in the mid to upper 70s has increased instability in this hot air mass even further. Second, the ridge of high pressure aloft has slid over Texas placing our region under northwest flow. This flow allows slightly cooler air aloft to provide more favorable lapse rates for rising parcels of unstable surface air and also opens up the possibility of impulses sliding around its periphery to swing a few disturbances through the region. Though honestly, no forecast models are finding any significant disturbances. Therefore the former explanation-instability with marine breeze interactions would be the most likely culprit for any pop-up afternoon showers through the week. Meanwhile, no mechanisms to erode the hot air mass are expected to affect the region and thus upper 90s with a few opportunities to snag triple digits will be possible through next weekend. Heat indices will continue to exceed 108° at times with heat advisories likely.


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