ZCZC SPCSWODY1 ALL ACUS01 KWNS 110054 SPC AC 110051 STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK DAY 1 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWE46 KWNS. VALID 110100Z - 111200Z NO SVR TSTM AREAS FCST. GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 25 SE EWN 15 W GSB 20 WSW GSO 15 NNW PSK 10 NE EKN AOO 30 SSW AVP 25 NE NEL. GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 30 SE MFR 50 E EUG 35 NNW RDM 35 ENE RDM 70 WSW BNO 10 NNW 4LW 40 SSE LMT 30 SE MFR. ...MIDDLE ATLANTIC... REGIONAL RADAR/SATELLITE IMAGERY SUGGEST CENTER OF UPPER LOW IS WOBBLING SLIGHTLY WEST OF NORTH ALONG THE SC/NC BORDER NEAR CLT. WITH COOL BOUNDARY LAYER AIR MASS WEDGED EAST OF THE MOUNTAINS...LOW LEVEL WARM ADVECTION HAS PROVEN THE PRIMARY REASON FOR ASCENT/CONVECTION LIFTING NWD ACROSS VA. AS ELY LLJ WEAKENS ACROSS THIS REGION IT APPEARS CONVECTIVE THREAT WILL SLOWLY DECREASE...ESPECIALLY AFTER MIDNIGHT. PROBABILITY FOR ADDITIONAL THUNDERSTORM DEVELOPMENT SOUTH OF THE FRONT OVER NC/SC IS NOW MINIMAL GIVEN THE LOSS OF HEATING. ...CASCADES... 00Z SOUNDINGS ACROSS THE PACIFIC NW AND NRN GREAT BASIN DEPICT DEEPENING BOUNDARY LAYER AND INCREASING INSTABILITY...GENERALLY ON THE ORDER OF 100-200 J/KG. ISOLATED THUNDERSTORMS MAY PERSIST ALONG THE CASCADES FOR THE NEXT FEW HOURS BEFORE INSTABILITY DECREASES DUE TO DIURNAL COOLING. ..DARROW.. 04/11/03 NNNN |