Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0749 PM CDT Tue Apr 25 2017 Valid 260100Z - 261200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FROM NORTHEAST OK INTO SOUTHEAST KS... ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM CENTRAL OK TO NORTH CENTRAL MO... ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM SOUTH CENTRAL OK TO NORTHERN MO... ...SUMMARY... Thunderstorms capable of large hail and damaging winds will increase in areal coverage from parts of northeast Oklahoma, southeast Kansas, northwest Arkansas, and western Missouri this evening into the overnight hours. ...Discussion... Large-scale forcing for ascent appears to be approaching the I-35 corridor this evening, per satellite imagery. Thunderstorms are beginning to increase along the cold front from southeast KS to near OKC and this trend is expected to continue as influence of upper trough interacts with gradually moistening warm sector. However, 00z soundings from OKC and FWD exhibit substantial mid-level drying with PW values less than one inch. Initial convection appears to be entraining a bit of dry air and more significant upward growth may be delayed until stronger ascent/mid-level moistening spreads east. Given the steep lapse rates observed, large hail and damaging winds are expected to be the primary threats as this frontal-induced squall line matures over the next few hours. ..Darrow.. 04/26/2017Read more
from SPC Forecast Products http://ift.tt/rxAC6Z
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