James Spann: Lower humidity for Alabama on Tuesday

COLD FRONT ARRIVES TONIGHT: A cold front, now near Memphis, will pass through Alabama tonight mostly in dry fashion, with just a few isolated showers over the Tennessee Valley. This will bring lower humidity to the state Tuesday, and afternoon temperatures will be about five degrees cooler, with highs between 74 and 78.

Dry weather continues Wednesday and Thursday with sunny, pleasant days and fair, cool nights. Another front arrives Thursday night. Like the one this evening, it will pass through with few, if any, showers, and it will bring the coolest air so far this season to much of the Deep South by Friday. The high Friday will be in the mid 60s with a cool north breeze.

THE ALABAMA WEEKEND: Saturday morning will feature some pretty chilly temperatures for October. Lows will be between 34 and 42 degrees, and a number of places will see their first frost of the season. Then, expect picture-perfect autumn weather for the weekend with sunny days and clear nights. The high will be close to 70 Saturday, followed by mid 70s Sunday.

NEXT WEEK: For now it looks like Alabama’s weather will remain mostly rain-free next week with highs mostly in the 70s and lows in the 40s and 50s.

TROPICS: Recently received satellite wind data indicates that the circulation associated with a tropical wave about 700 miles east of the Windward Islands has become better defined. However, upper-level winds have become less conducive for development. Some slow development of this system may occur during the next day or so while it moves generally west-northwestward near 15 mph. After that time, the upper-level winds will become even less conducive for development. The rest of the Atlantic basin, including the Gulf of Mexico, is quiet. Hurricane season ends Nov. 30.

ON THIS DATE IN 1979: The lowest barometric pressure ever recorded occurred in the center of Typhoon Tip. A fly reconnaissance mission recorded the low pressure of 870 millibars. Tip was the largest tropical cyclone on record, with a wind diameter of 1,380 miles.

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