SPC 0100Z Day 1 Outlook
DAY 1 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0700 PM CST SAT MAR 09 2013 VALID 100100Z - 101200Z ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PARTS OF TX/OK AND WESTERN AR... ...MUCH OF CENTRAL/NORTHEAST TX AND EASTERN OK/FAR WESTERN AR... A ROUGHLY 300-MILE EXTENSIVE NNE-SSW ORIENTED SQUALL LINE WILL CONTINUE TO MAKE A SLOW BUT STEADY EASTWARD PROGRESSION THIS EVENING ACROSS EASTERN OK AND CENTRAL/NORTHEAST TX...WITH DAMAGING WINDS AND SOME HAIL/PERHAPS A BRIEF TORNADO AS THE PRIMARY HAZARDS. SAMPLING THE ENVIRONMENT JUST AHEAD OF THE CONVECTIVE LINE...THE FORT WORTH 00Z OBSERVED SOUNDING WAS INDICATIVE OF 1600 J/KG MLCAPE WITH 50 KT OF EFFECTIVE SHEAR AND 270 M2/S2 OF EFFECTIVE SRH. FARTHER SOUTH...ON THE SOUTHERN FLANK OF THE SQUALL LINE...MORE SEMI-DISCRETE TSTMS/SUPERCELLS WILL PERSIST ACROSS WEST-CENTRAL TX/EDWARDS PLATEAU VICINITY. STORMS MAY ACTUALLY INCREASE IN COVERAGE THROUGH LATE EVENING/OVERNIGHT ACROSS THIS REGION OWING TO INCREASING FORCING FOR ASCENT VIA WARM ADVECTION/UPPER JET DIVERGENCE. LARGE HAIL/DAMAGING WINDS WILL BE POSSIBLE...AND A TORNADO CANNOT BE RULED OUT THIS EVENING. ...FAR SOUTH-CENTRAL NEB/NORTH-CENTRAL KS... A MARGINAL/SHORT-DURATION SEVERE THREAT MAY STILL EXIST EARLY THIS EVENING ACROSS THE REGION NEAR SURFACE LOW AND NEAR/JUST BEHIND THE SOUTHEASTWARD-MOVING SURFACE FRONT. HAIL POTENTIALLY TO SEVERE LEVELS MAY BE POSSIBLE OVER THE NEXT HOUR OR TWO AS THE BOUNDARY LAYER OTHERWISE COOLS/STABILIZES THIS EVENING. ..GUYER.. 03/10/2013
via SPC Forecast Products http://www.spc.noaa.gov/products/outlook/day1otlk_0100.html
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