SPC AC 121610
   
   DAY 1 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   1010 AM CST FRI MAR 12 2004
   
   VALID 121630Z - 131200Z
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 65 SW GBN 55 NW GBN
   70 WSW PRC 55 NNE IGM 35 SE U17 45 ENE ALS 15 NNE RTN 40 E LVS 45 N
   4CR 50 W ROW 35 ESE ROW 40 E LBB 10 NE SEP 45 WNW TPL 55 W AUS 25
   SSW SAT 15 W ALI 55 N BRO.
   
   ...NO SVR TSTM AREAS FORECAST...
   
   ...SYNOPSIS...
   UPPER LOW LOCATED WEST OF ELP IS FORECAST TO LIFT NEWD AND WEAKEN AS
   SYSTEM MOVES INTO CONFLUENT WNWLY FLOW ALOFT LOCATED ACROSS THE
   CENTRAL PLAINS. AN UPPER TROUGH OVER BRITISH COLUMBIA WILL DIG INTO
   THE NRN ROCKIES LATE TODAY...WITH AN ACCOMPANYING COLD FRONT PUSHING
   INTO THE NRN/CENTRAL HIGH PLAINS BY 13/12Z.
   
   ...SWRN U.S. THROUGH SWRN TX...
   UPPER DIVERGENCE AND ASCENT NORTH AND EAST OF UPPER LOW WILL
   MAINTAIN FAVORABLE ENVIRONMENT FOR CONVECTION...ESPECIALLY OVER SRN
   NM AND SWRN TX WHERE STEEPER LAPSE RATES ARE SUPPORTING MUCAPES AOB
   500 J/KG. MARGINAL ELEVATED INSTABILITY AND WARM ADVECTION BETWEEN
   800MB AND 700 MB MAY SUPPORT ISOLATED LIGHTNING SPREADING INTO
   PORTIONS OF WRN/CENTRAL TX LATER TODAY AND TONIGHT.
   
   ALTHOUGH UPPER SYSTEM WILL BE LIFTING AWAY FROM AZ...MORNING
   SOUNDINGS AT TUS AND FLG SHOW SUFFICIENT MID LEVEL MOISTURE AND
   LAPSE RATES OF 7-7.5C/KM FOR THUNDER TO DEVELOP THIS AFTERNOON...
   ESPECIALLY OVER THE HIGHER TERRAIN.
   
   ...CT/MA...
   VISIBLE IMAGERY SHOWS UPPER LOW LOCATED OVER ERN CT/MA AREA AT 15Z
   AND THIS LOW WILL SHIFT OFFSHORE NEXT COUPLE OF HOURS. STRONGEST
   LIFT/INSTABILITY HAVE MOVED OFFSHORE...SO THE THUNDER THREAT APPEARS
   TO HAVE ENDED FOR THE LAND AREAS.
   
   ...MT...
   AS UPPER TROUGH DIGS INTO THE NRN ROCKIES LATE TODAY AND TONIGHT...
   SIGNIFICANT COOLING ALOFT WILL STEEPEN LAPSE RATES. DESPITE THE COLD
   ENVIRONMENT...THE STRONG LIFT AND MARGINAL INSTABILITY MAY SUPPORT A
   COUPLE OF LIGHTNING STRIKES...BUT THREAT IS EXPECTED TO BE TOO
   ISOLATED FOR A THUNDER AREA.
   
   ..IMY.. 03/12/2004
   
   ...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 2000Z