Tuesday Afternoon, July 27, 2021
Chief Meteorologist Jason Simpson
Scattered storms today, hotter & drier Wednesday
A Heat Advisory in in effect for much of western and Northwest Alabama: heat index in the 102-108°F range through 7 PM.
The afternoon just looks hot. A few scattered storms develop here and there through early evening: mostly southeast of the Huntsville-Decatur area. Rain comes down heavily in isolated spots (up to 2″ per hour), but those downpours cover a limited amount of territory leaving most of us high and dry.
Expect temperatures in the low-90s this afternoon with a heat index as high as 102°F to 108°F before 7 PM.
The rest of the week
It’s hot. It’s humid. It’s normally the hottest period of the year, and it’s working out to that tune for the rest of the week.
A strong ridge west of Alabama and Tennessee expands eastward on Wednesday and Thursday: squeezing down on any storms that try to develop in the afternoons and allowing temperatures to soar upward to the middle and upper 90s.
Slightly – ever so slightly – drier air comes in on a north wind through midweek, and that may keep the heat index below ‘excessive heat’ levels (110°F+) as air temperatures rise into the 95°F to 99°F range in the afternoons.
A weak cool front moves in Saturday raising the odds of scattered storms. It stalls over the region this weekend, and another push of substantially cooler driven south by a more active jet stream enhances the storminess along the boundary Sunday into Monday.
After that, we’ll get a little break from this hot, sticky weather with a decent temperature drop (about 4 to 8 degrees below average) and a larger humidity drop early next week.
At the Gulf Coast
Heed local beach patrol advice and keep up to date with the forecast for the weather and surf conditions with our Gulf Coast forecast page.
TENNESSEE VALLEY FORECAST
TUESDAY: Another hot day with scattered showers and storms. Highs in the upper 80s and low 90s. Heat index 100°-105°. Wind: Light West wind.
TUESDAY NIGHT: Warm and muggy. Lows in the lower to middle 70s. Winds: Light.
WEDNESDAY: Very hot and dry. Temperatures top out in the mid 90s, with a heat index around 103°-108°. Wind: Light WNW.
WEDNESDAY NIGHT: Fair with patchy fog. Lows in the low-70s.
THURSDAY: Very hot. Highs in the middle 90s. Heat index 103°-108°.
THURSDAY NIGHT: Clear and warm. Humid with some patchy fog. Lows in the low-70s. Light wind.
FRIDAY: Some spotty storms possible. Hot and humid! Highs in the 90s, a heat index above 100°F. Wind: NNW 5-10 mph.
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