Alabama 811 | Know What's Below.

Mid-Morning Update

| April 29, 2014 @ 10:17 am

Another day of dangerous severe weather is expected over Alabama and Mississippi. The SPC has much of both states outlined in their enhanced moderate risk for severe weather. This moderate risk includes Birmingham, Tuscaloosa, Demopolis, Clanton, Cullman, Jasper, Livingston, Meridian, and Hattiesburg.

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THE SET-UP: The large upper-level low continues to spin across the Midwest and shortwave troughs continue to rotate around it. These shortwave help enhance the uplift. A warm, and moist air mass remains in place across the region this morning. In the upper-levels, a jet max will be coming out of Texas and will further enhance uplift in the area. We will also have enough wind shear in place that will allow storms to maintain their updrafts and help them rotate.

INSTABILITY: Yesterday, the instability was already in place across the state. Today, the atmosphere here will have to do some recharging. We are seeing that this morning as our dew points begin to creep back up. Along with increasing dew points, we will also have daytime heating and looking the latest satellite data, much of Central and Northern Mississippi is seeing sunny conditions this morning. The clouds are expected to erode over Alabama through the morning, which will allow us to warm up nicely with highs once again around 80. This will only increase and enhance the instability across the region. CAPE this morning in Central Alabama is averaging 500-1000 J/kg, with the daytime heating and increasing moisture these are expected to climb to between 1000-2000 J/kg this afternoon. This is more than sufficient for severe weather to develop.

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THREATS: Once again, we will see all modes of severe weather today. Expect large hail, damaging winds, the threat for flash flooding, and even some strong tornadoes will be possible. The models show a very similar set-up to yesterday’s event, with a line of broken supercells sinking to the southeast as the individual storms race off to the north-northeast.

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TIMING: The models show showers and storms developing along the Mississippi River around noon today. This activity will then begin moving east and will be entering Alabama by mid-afternoon. By this time, enough instability is expected to have built back in that will allow these storms to intensify. These strong and severe storms are expected to impact much of Central Alabama through the late afternoon, evening, and into the overnight hours once again.

Make sure you stay weather aware today, and have your severe weather plan ready to take action when needed. Have multiple, reliable sources for severe weather alerts.

Category: Alabama's Weather, Severe Weather

About the Author ()

Macon, Georgia Television Chief Meteorologist, Birmingham native, and long time Contributor on AlabamaWX. Stormchaser. I did not choose Weather, it chose Me. College Football Fanatic. @Ryan_Stinnet

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