HEAT ADVISORY CONTINUES: At least for today and tomorrow, we continue to see heat index values over 105° and therefore heat advisories remain in effect across Alabama. We deal with these several times through the summer, but when you have such high heat levels (the combination of hot temperature and high humidity) the onset of heat illnesses, specifically heat exhaustion and heat stroke, will occur more quickly and can really sneak up on you, so please be careful!
Afternoon highs today are in the low and mid 90s across the state with rain chances around 50%, so hit or miss. BIG HEAT brings BIG STORMS and storms will be strong this afternoon and evening with strong gusty winds in the form of downbursts. But over the past few days, lightning has been the main threat with storms as very high instability is allowing for more frequent and more intense lightning; window and house shaking thunder accompanies this kind of lightning. Not much change in the forecast for tomorrow.
BIRMINGHAM ALMANAC: For July 30th, the average high for Birmingham is 91° and the average low is 73°. The record high is 101° set in 1986, while the record low is 57° set in 2014. We average 0.16” of precipitation on this date and the record value is 2.33” set in 1984.
FRIDAY AND THE WEEKEND: The ridge begins to weaken and shift west allowing heat levels to decrease while rain chances will increase. Highs Friday will be closer to 90° with rain chances closer to 70%. Then for the weekend and early next week, highs will range from the low to mid-80s Saturday through Tuesday. The sky will be occasionally cloudy these days with scattered to numerous showers and thunderstorms around. No wash-out, but expect rain and storms from time to time both days, with higher coverage during the afternoon and evening hours.
NEXT WEEK: The ridge begins to strengthen for the latter half of next week, which will cause afternoon highs to return to the low and mid 90s. Each day will continue to random, scattered showers ands storms with the greatest coverage during the afternoon and evening hours.
IN THE TROPICS: The Atlantic Basin, including the Gulf and Caribbean are quiet for now with no tropical cyclone development expected the next seven days. However, we are heading into the heart of the season (August, September, and early October), so we should at least start seeing more activity in the coming weeks. But, we continue to see a lot of Saharan Dust which for now, is limiting tropical cyclone development across the Tropical Atlantic.
WORLD TEMPERATURE EXTREMES: Over the last 24 hours, the highest observation outside the U.S. was 123.8F at Basrah International Airport, Iraq. The lowest observation was -102.6F at Concordia, Antarctica.
CONTIGUOUS TEMPERATURE EXTREMES: Over the last 24 hours, the highest observation was 115F at Death Valley, CA. The lowest observation was 29F at Mackay, ID.
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