Brian Peters: Alabama weather cranks up the heat this week

Brian Peters: from Alabama NewsCenter on Vimeo.

The surface high that was centered over the Carolinas yesterday was settling into Georgia this morning, and Alabama was experiencing clear skies with morning lows in the 60s. East Central and Northeast Alabama were slightly cooler with morning values in the 50s. Humidity values will remain down today, so even as the afternoon highs climb into the upper 80s with spots nudging that 90-degree mark, it will continue to feel fairly nice.

The surface high will continue to migrate into the Northeast Gulf of Mexico as the upper ridge that is producing the exceptional heat over the Southwest U.S. noses its way into the Southeast U.S.

AT THE BEACH: For beachgoers, the entire coast should be mainly dry with only isolated afternoon and evening storms this week and even into the weekend. Highs will be near 90 with lows in the middle 70s. Water temperatures are climbing through the lower 80s. See a detailed Gulf Coast forecast here.

TROPICS: At 7 a.m. the National Hurricane Center upgraded Tropical Depression 4 to Tropical Storm Danielle. The storm is making its way westward and should cross the coast of Mexico later today.

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REST OF THE WEEK: Beginning Tuesday, a big upper ridge will nose into the Southeast U.S. to become the main feature for our weather pattern until Saturday. Dew points will climb into the 60s Tuesday and will likely remain there until Friday with the potential for readings to climb into the 70s by Saturday and Sunday. Beginning Friday and extending into next weekend, we will include the potential for isolated afternoon thunderstorms, but most people will remain dry. Highs will be climbing into the middle 90s and heat indices may once again approach those unhealthful levels from 105 to 110.

The GFS is holding the promise of some big changes to this pattern come Sunday and Monday as a very strong upper closed low moves into the western Great Lakes area and begins to carve out a substantial trough over the eastern third of the U.S. This will end the domination of that upper ridge for the Southeast U.S. as it is pushed back into the Southwest U.S. If this pattern verifies, we’ll see our best chance for rain in the next seven to 10 days coming next Sunday and Monday. It would also lower our afternoon highs into the upper 80s with the potential for another shot of drier air for us to experience as we enter July.

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Voodoo country has got a big surprise for us. The pattern shift the GFS is forecasting with the eastern U.S. trough appears to stay with us as a broad upper trough. But as we get to the Fourth of July, the GFS seems to have gone way out on a limb with a 570 decameter closed low over southern Arkansas. Should this pattern verify, we’ll need to consider building an ark! But it’s my guess that this rather dramatic feature is likely to be gone in the next model run. The idea of troughiness in the eastern U.S. is appealing to me since it would keep us out of any extreme heat.

James Spann is taking a much deserved week off. Enjoy the slightly drier air while you can.

For more weather news and information from Brian Peters and the rest of the James Spann team, visit AlabamaWX.

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