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Displaying AFOS PIL: SWODY3 Product Timestamp: 2002-04-26 09:58 UTC
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000 ACUS03 KWNS 260958 SWODY3 SPC AC 260933 STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK DAY 3 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWK48 KWNS. VALID 281200-291200 THERE IS A SLIGHT RISK OF SVR TSTMS FOR THE PA/NY AREA. ...SYNOPSIS... A STRONG SHORTWAVE TROUGH...NOW OVER SRN CA...IS EXPECTED TO MOVE OVER THE SRN ROCKIES TODAY...THE MID MS VALLEY TOMORROW...AND CONTINUE EWD FROM THE GREAT LAKES/OH VALLEY TO NEW ENGLAND ON DAY 3. AT THE SURFACE...A DEEP CYCLONE WILL MOVE EWD ACROSS THE PA/NY AREA IN ADVANCE OF THE MID LEVEL TROUGH. ...PA/NY AREA... THE CONTINENTAL POLAR AIR MASS NOW COVERING THE ERN CONUS SHOULD ERODE FROM THE SW AS THE DEEP LOW APPROACHES...ALLOWING LOW-LEVEL MOISTURE NOW NEAR THE GULF COAST TO SPREAD AS FAR NEWD AS PA/NY. GIVEN THE REASONABLE AGREEMENT AMONGST THE MODEL FORECASTS... IT SEEMS PLAUSIBLE THAT A WARM SECTOR WITH VERY STRONG DEEP LAYER WIND FIELDS AND AT LEAST WEAK INSTABILITY WILL BECOME ESTABLISHED AS FAR NE AS PA/NY DURING THE DAY. ASCENT WITH THE SURFACE LOW/MID LEVEL TROUGH SHOULD PROVIDE A FAVORABLE ENVIRONMENT FOR THUNDERSTORM DEVELOPMENT...WITH THE THREAT FOR A FEW FAST MOVING SEVERE STORMS. ...APPALACHIANS TO OH/TN VALLEYS... FARTHER SW ALONG THE TRAILING SURFACE COLD FRONT...THERE WILL ALSO BE THE POSSIBILITY OF THUNDERSTORM DEVELOPMENT IN AN ENVIRONMENT OF MODERATE-STRONG MID LEVEL FLOW AND MODERATE INSTABILITY. THOUGH THUNDERSTORM INITIATION/COVERAGE WILL BE LESS CERTAIN WELL SW OF THE SURFACE LOW...STORMS THAT FORM WILL HAVE SOME POTENTIAL TO BECOME SEVERE. ..THOMPSON.. 04/26/02
442 ACUS03 KWNS 260958 SWODY3 SPC AC 260933 STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK DAY 3 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWK48 KWNS. VALID 281200-291200 THERE IS A SLIGHT RISK OF SVR TSTMS FOR THE PA/NY AREA. ...SYNOPSIS... A STRONG SHORTWAVE TROUGH...NOW OVER SRN CA...IS EXPECTED TO MOVE OVER THE SRN ROCKIES TODAY...THE MID MS VALLEY TOMORROW...AND CONTINUE EWD FROM THE GREAT LAKES/OH VALLEY TO NEW ENGLAND ON DAY 3. AT THE SURFACE...A DEEP CYCLONE WILL MOVE EWD ACROSS THE PA/NY AREA IN ADVANCE OF THE MID LEVEL TROUGH. ...PA/NY AREA... THE CONTINENTAL POLAR AIR MASS NOW COVERING THE ERN CONUS SHOULD ERODE FROM THE SW AS THE DEEP LOW APPROACHES...ALLOWING LOW-LEVEL MOISTURE NOW NEAR THE GULF COAST TO SPREAD AS FAR NEWD AS PA/NY. GIVEN THE REASONABLE AGREEMENT AMONGST THE MODEL FORECASTS... IT SEEMS PLAUSIBLE THAT A WARM SECTOR WITH VERY STRONG DEEP LAYER WIND FIELDS AND AT LEAST WEAK INSTABILITY WILL BECOME ESTABLISHED AS FAR NE AS PA/NY DURING THE DAY. ASCENT WITH THE SURFACE LOW/MID LEVEL TROUGH SHOULD PROVIDE A FAVORABLE ENVIRONMENT FOR THUNDERSTORM DEVELOPMENT...WITH THE THREAT FOR A FEW FAST MOVING SEVERE STORMS. ...APPALACHIANS TO OH/TN VALLEYS... FARTHER SW ALONG THE TRAILING SURFACE COLD FRONT...THERE WILL ALSO BE THE POSSIBILITY OF THUNDERSTORM DEVELOPMENT IN AN ENVIRONMENT OF MODERATE-STRONG MID LEVEL FLOW AND MODERATE INSTABILITY. THOUGH THUNDERSTORM INITIATION/COVERAGE WILL BE LESS CERTAIN WELL SW OF THE SURFACE LOW...STORMS THAT FORM WILL HAVE SOME POTENTIAL TO BECOME SEVERE. ..THOMPSON.. 04/26/02