SPC AC 272028
   
   DAY 1 CONVECTIVE OUTLOOK CORR 1
   NWS STORM PREDICTION CENTER NORMAN OK
   0328 PM CDT TUE APR 27 2004
   
   VALID 272020Z - 281200Z
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 25 WNW FMY MLB.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 30 N HSE 25 ENE RWI
   25 NNW GSO 20 WSW BLF 20 WNW CRW 20 N PKB 20 SW YNG 35 WSW ERI.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 70 SSW GBN 35 SE GBN
   45 NNW TUS 30 SSW SAD 70 E DUG.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 65 NNE OLF 20 NNE WRL
   45 SSW BYI 55 SE BNO 65 SW PDT 10 SSW HQM.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 45 ESE INL 25 ESE DLH
   15 NNE EAU 25 N RST 25 WNW MKT 15 SE FAR 30 ENE DVL 65 NNW DVL.
   
   ...NO SVR TSTM AREAS FORECAST...
   
   CORRECTED FOR MISSING THUNDER GRAPHIC OVER MN
   
   ...MID ATLANTIC AREA THROUGH NERN STATES...
   
   A LARGE UPPER TROUGH WILL CONTINUE EWD THROUGH THE ERN U.S. THIS
   AFTERNOON BEFORE MOVING OFFSHORE BY LATE TONIGHT. A STRONG SHORTWAVE
   TROUGH ROTATING THROUGH THE BASE OF THE UPPER TROUGH IS MOVING
   THROUGH THE CNTRL AND NRN APPALACHIANS. THIS FEATURE WILL CONTINUE
   EWD INTO THE MID ATLANTIC AND NE U.S. THIS EVENING.
   
   COLD AIR ALOFT ACCOMPANYING THE UPPER TROUGH AND SURFACE HEATING
   HAVE CONTRIBUTED TO STEEP LOW-MID LEVEL LAPSE RATES. HOWEVER...
   BOUNDARY LAYER DEWPOINTS HAVE MIXED DOWN INTO THE 30S...LIMITING
   MLCAPE TO AOB 300 J/KG. MOST OF THIS CAPE IS CONFINED TO BELOW 4 KM
   SUPPORTING WIDESPREAD LOW TOPPED CONVECTION WITH ONLY VERY ISOLATED
   LIGHTNING STRIKES AND POSSIBLY SOME SMALL HAIL WITH THE STRONGER
   CONVECTION. THIS ACTIVITY WILL CONTINUE MAINLY IN ZONE OF ASCENT
   FROM THE MID ATLANTIC INTO THE NE U.S. BEFORE THE BOUNDARY LAYER
   COOLS AND STABILIZES BY MID EVENING.
   
   ...NWRN U.S....
   
   WV IMAGERY SHOWS A STRONG SHORTWAVE TROUGH DROPPING SEWD INTO THE
   NRN INTERMOUNTAIN AND PACIFIC NW REGION. WLY LOW-MID LEVEL FLOW WILL
   INCREASE THIS AFTERNOON IN ADVANCE OF THE SHORTWAVE. THE RESULTING
   ENHANCED UPSLOPE COMPONENT AND LARGE SCALE ASCENT ACCOMPANYING THE
   UPPER TROUGH SHOULD PROMOTE AN INCREASE IN THUNDERSTORM ACTIVITY
   DURING THE EVENING...ESPECIALLY FROM PARTS OF ID INTO WRN MT. OTHER
   STORMS WILL LIKELY DEVELOP IN VICINITY OF COLD FRONT AS IT CONTINUES
   SWD THROUGH THE NRN INTERMOUNTAIN AND ROCKY MOUNTAIN REGIONS.
   STRENGTH OF FLOW WITH 30-50 KT WITHIN THE LOWEST 3 KM AND DRY
   BOUNDARY LAYERS SUGGEST CONVECTIVELY ENHANCED STRONG WIND GUSTS WILL
   BE POSSIBLE THROUGH THE EVENING.
   
   ...S FL...
   
   DESPITE RICH LOW LEVEL MOISTURE IN PLACE...CLOUDS AND MARGINAL LAPSE
   RATES HAVE LIMITED MLCAPE IN PRE-FRONTAL WARM SECTOR OVER S FL TO
   AROUND 1000 J/KG OR LESS. AN ISOLATED WET MICRO BURST OR TWO MAY BE
   POSSIBLE THROUGH EARLY EVENING...BUT OVERALL THREAT APPEARS VERY
   MARGINAL.
   
   ..DIAL.. 04/27/2004
   
   ...NOTICE...
   FOR USERS DECODING THE POINTS PARAGRAPH HEREIN...LATITUDE AND
   LONGITUDE POINTS FOR THE CATEGORICAL AND PROBABILISTIC OUTLOOK
   GRAPHICS ALSO ARE LOCATED IN A SEPARATE PRODUCT UNDER THE WMO
   HEADINGS WUUS01 PTSDY1...WUUS02 PTSDY2...AND WUUS03 PTSDY3.  THE
   INCLUSION OF POINTS IN THIS PRODUCT WILL EVENTUALLY BE DISCONTINUED.
   
   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED FOR 0100Z