***UPDATE*** The Storm Prediction Center added several severe thunderstorm watches. Severe thunderstorm watch #9 for parts of Alabama and Georgia which is in effect until 8pm EDT and severe thunderstorm watch #10 for portions of Mississippi and Arkansas which is valid until 7pm CDT.
There is a wide area in the Slight risk threat for severe today from the Plains to the Southeast! Primary threats today will be damaging winds and hail although a tornado or two across southern Oklahoma cannot be ruled out. See the graphics for the risk areas. There will be another round of severe weather beginning tomorrow from Iowa and Nebraska. This will sweep southeast on Thursday and Friday bringing the risk for severe weather into the Tennessee Valley and Southeast.
A powerful storm system is digging its way across the central plains today and will bring with it the threat for severe weather from The Ohio Valley southwest to Texas. A shortwave trough will swing southeast and the associated cold front will be the boundary that will initiate storms. The atmosphere will be very moist with dew points in the 60’s across much of the warm sector ahead of the cold front. CAPE, which is a measure of instability, will also be 2,000+. Wind shear across the region should be between 45-50kts which will be supportive of supercells. The focus of the severe weather will be in much of central and eastern Oklahoma, northwest Arkansas, and southwest Missouri where very large hail greater than 2″ in diameter is going to be likely. The Storm Prediction center has issued a moderate risk for severe storms across this region to account for this threat (see image below). Large hail is not the only threat in the central plains, damaging winds will also accompany some of the stronger storms and a tornado or two can not be ruled out. For the very latest information during the event please visit our facebook page. I will update this article as needed.
Spring seems to have arrived, bringing with it some heavy showers. Much of the eastern half of the country will have a chance for heavy rain and some flooding this weekend. There is a broad area of moderate to heavy rain that extends from the Gulf of Mexico north into the Ohio valley. This area of rain will slowly shift east. Folks, remember to “Turn Around, Don’t Drown” when it comes to flooded roadways. Flooding is the #1 weather killer. Be safe, be smart. For all the latest Watches and warnings check out our Weather Data Page! We’ll keep you updated on the flood threat.
Here is the latest map of national hazards as of 12:30pm EDT March 13, 2015