SPC AC 170840
   
   DAY 2 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0240 AM CST WED MAR 17 2004
   
   VALID 181200Z - 191200Z
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 15 E JAX 30 ESE VLD
   30 NNW PFN BTR 40 NNE BPT 30 S CLL 45 NNW SAT 10 NW JCT 45 SW ABI 65
   N ABI 35 ESE FSI 15 W PGO 15 W MEM 20 SW BNA 25 NW TYS 35 W HKY 30
   ENE CLT 25 ESE FAY 15 E ILM.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 25 NE CTB 40 SSE GTF
   40 E DLN 15 NNE SUN 55 N OWY 80 N WMC 40 ENE 4LW 40 ESE RDM 25 ENE
   DLS 50 NW 63S.
   
   ...NO SVR TSTM AREAS FORECAST...
   
   ...SYNOPSIS...
   SHIFT IN THE OVERALL WEATHER PATTERN IS EVIDENT IN THE MODELS AS
   STRONG MID LATITUDE TROUGH OVER THE NERN U.S. MOVES OFFSHORE. 
   STRONG BRANCH OF THE WESTERLIES MOVES OVER THE PACIFIC NORTHWEST
   MIGRATING MID LEVEL RIDGE FROM THE NRN ROCKIES EWD INTO THE UPPER
   MIDWEST.  WEAK SURFACE FEATURES FORECAST OVER THE TN VALLEY WSWWD
   INTO THE RED RIVER VALLEY OF NRN TX WILL PHASE WITH LOW PRESSURE
   OVER WI AS IT MOVES INTO CENTRAL OH BY 19/00Z. A COLD FRONT WILL
   EXTEND SWD AND WWD THROUGH ERN TN CENTRAL MS INTO NRN TX. THIS LOW
   WILL MOVE EWD THURSDAY EVENING ACROSS NRN VA/SRN MD THEN WELL
   OFFSHORE BY THE END OF THE PERIOD.  ALSO...A STRONG COLD FRONT WILL
   MOVE ACROSS THE NWRN U.S. DURING THE DAY THURSDAY.
   
   ...SC/GA WWD INTO NRN TX...
   
   SCATTERED ELEVATED THUNDERSTORMS ARE EXPECTED TO BE ONGOING AT THE
   BEGINNING OF THE DAY2 PERIOD ASSOCIATED WITH EXIT REGION OF 40-50 KT
   LOW LEVEL JET EXTENDING FROM CENTRAL TX ENEWD INTO MIDDLE TN. 
   STRONG WARM AIR ADVECTION IS FORECAST OVER PARTS OF KY..TN...AL AND
   GA.  THIS JET IS EXPECTED TO EXTEND INTO THE CAROLINAS BY AFTERNOON
   AS FRONTOGENESIS INCREASES MOVING ELEVATED ACTIVITY INTO PARTS OF
   THE CAROLINAS DURING THE FIRST HALF OF THE PERIOD.  MODELS INDICATE
   THAT INSTABILITY WILL BE LACKING AS SYSTEM WILL BE WORKING WITH
   COOLER...MODIFIED AIR OFF THE ATLANTIC.  THUS...THUNDERSTORM
   ACTIVITY MAY LESSEN AS ASSOCIATED LOW MOVES FROM OHIO EWD OFF THE
   DELMARVA REGION.
   
   MODELS INDICATE THOUGH THAT FRONTAL BOUNDARY WILL BEGIN MOVING
   SLOWLY NWD ACROSS CENTRAL TX DURING THE LATTER HALF OF THE PERIOD. 
   BOTH THE ETA AND GFS DEVELOP ISOLATED ELEVATED ACTIVITY NEAR
   DEVELOPING SURFACE LOW OVER NWRN TX...WHILE THE ETAKF DOES NOT
   DEVELOP ANY PRECIPITATION DUE TO WEAK LOW LEVEL FLOW.
   
   ...NRN PLATEAU REGION...
   
   STRONG COLD FRONT WILL MOVE EWD ACROSS THE NORTHWESTERN U.S. DURING
   THE PERIOD AS STRONG BAND OF WESTERLIES EXTEND FROM OVER THE PACIFIC
    THROUGH ID AND MT BY 19/12Z.  STRONG MID LEVEL THERMAL GRADIENT
   ASSOCIATED WITH THE COLD FRONT IS EXPECTED TO ENHANCE UVVS OVER
   PARTS OF THE NRN PLATEAU FOR ISOLATED THUNDERSTORMS THURSDAY
   AFTERNOON.
   
   ..MCCARTHY.. 03/17/2004
   
   ...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 2 OUTLOOK IS SCHEDULED FOR 1730Z