Jun 1, 2005 2000 UTC Day 1 Convective Outlook Updated: Wed Jun 1 20:06:21 UTC 2005
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SPC AC 012002 DAY 1 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0302 PM CDT WED JUN 01 2005 VALID 012000Z - 021200Z THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 75 N GFK 35 SSE GFK 20 NW ATY 55 SSW MHE 35 NNE LBF 40 NNW IML 30 WNW SNY 55 N CYS 15 SSE WRL 30 ENE COD 25 ESE BIL 15 SSW MLS 10 ENE GDV 20 W ISN 60 NNW ISN. THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM AQQ 35 NNW TLH 25 NNE ABY 30 ENE MCN 10 WSW AGS 45 SSE CAE 40 SSW CRE ...CONT... 20 ESE JAX 30 NE GNV 15 WSW GNV 35 SSE CTY. GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 40 NE ELO 20 N DLH 35 ESE MSP 25 SE RST 25 ESE OTM 30 NW ALN 35 W EVV 25 SE OWB 50 S BNA 20 WSW CHA 10 S GSP 25 E CLT 15 NW GSB 25 NE HSE. GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 45 W MRF 45 E ALM 55 NNE 4CR 30 SW RTN 35 WNW TAD 35 SSE GUC 45 NNE 4BL 30 NE BCE 50 SSW P38 65 NE TPH 35 NE U31 20 NNE ENV 40 S BYI 15 WNW TWF 70 NW OWY 50 SE BNO 25 NNW BNO 35 E RDM 25 SW RDM 55 SSE EUG 25 NNW OTH ...CONT... 30 NW CAR 40 E BML 20 SSE EEN 30 N BDR 20 NE TTN 35 N BWI 20 E LBE 10 NW FKL 55 N ERI. ...THERE IS A SLGT RISK OF SVR TSTMS OVER THE NRN PLAINS... ...THERE IS A SLGT RISK OF SVR TSTMS OVER S GA...SRN SC AND NRN FL... ...NRN PLAINS... A STRONG SHORTWAVE TROUGH AND ASSOCIATED SPEED MAX OVER THE NRN ROCKIES WILL CONTINUE ENEWD INTO THE NRN PLAINS THIS EVENING AND TONIGHT ACCOMPANIED BY A COLD FRONT. THE FRONT CURRENTLY EXTENDS FROM S CNTRL MT SEWD THROUGH THE BIG HORNS OF WY THEN FARTHER SE THROUGH SERN WY. THE PRE-FRONTAL WARM SECTOR IS DESTABILIZING OVER THE NRN HIGH PLAINS THROUGH THE DAKOTAS. STEEP LAPSE RATES...POCKETS OF HEATING AND LOW LEVEL DEWPOINTS IN THE 50S WILL CONTRIBUTE TO MODERATE INSTABILITY THIS AFTERNOON WITH MLCAPE FROM 1500 TO 2000 J/KG EXPECTED. THE SLY LOW LEVEL JET WILL CONTINUE TO STRENGTHEN THROUGH THE EVENING ACROSS THE DAKOTAS AS THE UPSTREAM SPEED MAX APPROACHES. STORMS ARE EXPECTED TO CONTINUE DEVELOPING IN VICINITY OF THE FRONT AND WITHIN PRE-FRONTAL WARM SECTOR SUPPORTED BY INCREASING ASCENT AND WARM ADVECTION ALONG THE INTENSIFYING LOW LEVEL JET. STRONG VERTICAL SHEAR PROFILES WILL SUPPORT ORGANIZED STORMS INCLUDING SUPERCELLS...BUT SOME STORMS MAY ORGANIZE INTO LINES...ESPECIALLY ALONG THE COLD FRONT. VERY LARGE HAIL AND DAMAGING WIND APPEAR LIKELY. ISOLATED TORNADOES MAY ALSO BE POSSIBLE... ESPECIALLY OVER THE HIGH PLAINS INTO THE DAKOTAS WHERE THE LOW LEVEL SHEAR WILL BE ENHANCED ALONG THE DEVELOPING LOW LEVEL JET AXIS. ACTIVITY MAY EVOLVE INTO ONE MORE MCSS DURING THE EVENING WITH A CONTINUED THREAT OF LARGE HAIL AND DAMAGING WIND. ...SRN GA...NRN FL AND SRN SC... SCATTERED STORMS CONTINUE DEVELOPING WITHIN THE WEAKLY CAPPED ENVIRONMENT FROM SRN GA INTO SRN SC WHERE PARTIAL SURFACE HEATING HAS RESULTED IN SOME DESTABILIZATION. HOWEVER...INSTABILITY IS LIMITED TO AOB 800 J/KG DUE TO WEAK LAPSE RATES AND WIDESPREAD CLOUDS. IT APPEARS THAT THE BEST POTENTIAL FOR ISOLATED TORNADOES MAY BE AS STORMS MOVE NWD AND INTERACT WITH E-W ORIENTED BOUNDARY FROM S CNTRL GA EWD INTO SRN SC WHERE THE LOW LEVEL VERTICAL SHEAR IS ENHANCED. THREAT IS EXPECTED TO DIMINISH BY MID EVENING WITH LOSS OF SURFACE HEATING. ...SWRN TX... THE ATMOSPHERE HAS BECOME MODERATELY UNSTABLE OVER SWRN TX WHERE STRONG SURFACE HEATING AND STEEP LAPSE RATES EXIST. SELY LOW LEVEL FLOW VEERING TO NWLY WITH HEIGHT IS RESULTING IN SUFFICIENT VERTICAL SHEAR FOR SUPERCELLS. HOWEVER...HEIGHTS CONTINUE TO RISE AS UPPER RIDGE BUILDS EWD. THIS IN CONJUNCTION WITH WEAK LOW LEVEL FLOW SUGGEST CONVECTIVE INITIATION MAY BE LIMITED. WILL MAINTAIN ONLY LOW SEVERE PROBABILITIES AT THIS TIME DUE TO LOW CONFIDENCE THAT STORMS WILL DEVELOP. ..DIAL.. 06/01/2005 ...NOTICE... THE STATION RELATIVE POINTS IN THIS PRODUCT ARE NOW AVAILABLE SEPARATELY UNDER THE WMO HEADINGS WUUS01 PTSDY1... WUUS02 PTSDY2...WUUS03 PTSDY3. THE INCLUSION OF POINTS IN THIS DISCUSSION WILL BE DISCONTINUED AFTER THE 2005 CONVECTIVE SEASON. A PUBLIC NOTIFICATION STATEMENT (PNS) WILL PROVIDE DETAILS ON THE TRANSITION. CLICK TO GET WUUS01 PTSDY1 PRODUCT NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0100Z |