First Chase Of The Year

Posted in Severe Weather Nowcast, Storm Chasing at 2:37 pm by Rebekah

2:12 pm CDT mesoscale discussion graphic from the Storm Prediction Center.

I changed my mind about chasing today, and Jeff and I are on our way up I-35. We’re about 40 miles from Blackwell, Oklahoma, which is around my target area.

There is a nice cumulus field through western Oklahoma, MLCAPE is increasing to above 1500 J/kg in northwest Oklahoma (SBCAPE is above 2500 in western Oklahoma), lapse rates are fairly steep, dewpoints are in the low 60s, and 0 to 6 km bulk shear over much of western and northern Oklahoma is around 60 knots.

A dryline is sharpening in far western Oklahoma, and a warm front is stretching up from southern into eastern Kansas. A surface low is intensifying along the western Kansas/Oklahoma border, in response to a deep shortwave trough heading into the Texas Panhandle.

My expectations are fairly low, but there is a decent chance that there could be a supercell or two up around the Kansas/Oklahoma border late this afternoon. Some elevated storms have already formed along the warm front, but we’re hoping for more surface-based storms closer to the triple point.

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