Wednesday, April 25, 2007
12:30 PM UPDATE
Northern counties; Delaware, Cherokee, and Adair in OK, along with Washington, Benton, Carroll, and Madison in AR, are now breaking out in sunshine. Cumulus clouds are beginning to pop as well. With the cold front still lagging back to our west the potential for thunderstorms, some of which may produce large hail, still exists. The wet bulb zero temperature is roughly at 8000 to 8500 feet. This is low and will certainly support large hail growth.
Individual thunderstorms are starting to pop between I-35 and I-44 in northern OK. The atmosphere has been capped this morning and into the early afternoon, though now this is starting to break. RUC analysis has a bull’s eye of 500-1000 J/kg of CAPE (Convective Available Potential Energy) over NW AR and NE OK. We are watching this area closely as a hot spot for thunderstorm development. The best window for storm development, coinciding well with sun breaks and peak heating. is now through the late afternoon as the cold front finally pushes through.
Posted by Ted Zarras at 10:37 AM
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