SPC AC 210110
   
   DAY 1 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0810 PM CDT TUE APR 20 2004
   
   VALID 210100Z - 211200Z
   
   THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM 35 N
   CLE 25 WSW CLE 15 W DAY 25 WSW EVV 40 N HOT 30 SE DUA 40 N DAL 45
   SSW ADM 25 W ADM 20 NE BVO 10 WSW MKC 15 SE STJ 35 N STJ 25 S OMA 20
   E OLU 15 WSW OFK 35 SW YKN 25 NE YKN 25 ESE RST 25 SSE MTW 10 S MBS
   40 NE MTC.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 25 N UIL 35 SSW CLM
   35 ESE AST 15 SW EUG 4BK.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 35 E RRT 10 NNW FAR
   55 NE ABR 30 E ABR 10 SW ATY 40 ENE BKX 20 NW MSP 25 NE RHI 45 NNW
   ANJ ...CONT... 40 NW JHW 30 WSW IPT ACY ...CONT... 20 E ECG 55 NNW
   RWI 20 S LOZ 30 S CKV 25 E MEM 40 WNW MLU 25 WNW POE 25 ESE BPT
   ...CONT... 75 NW GGW 60 E LWT 20 ESE BIL 30 WSW SHR 40 SE SHR 10 NE
   GCC 30 WNW REJ 60 NNE MOT.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 25 N UIL 35 SSW CLM
   35 ESE AST 15 SW EUG 4BK.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 65 S CRP 15 SSW HDO
   15 NNE JCT 60 SW SPS 40 E CSM 50 ENE GAG 50 WSW P28 15 NW LHX 20 N
   MTJ 45 ESE DPG 60 NE EKO 35 WSW BOI 25 WSW PUW 35 NE 63S ...CONT...
   40 NW JHW 30 WSW IPT ACY.
   
   ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PARTS OF FAR NE TX...ERN
   OK...NW AR...FAR ERN KS...MO...IL...IND...IA...NE NEB AND FAR SE
   SD...
   
   ...OZARK PLATEAU...
   
   SFC ANALYSIS SHOWS A COLD FRONT ACROSS WRN MO AND ERN KS WITH A
   DRYLINE EXTENDING SWD THROUGH CNTRL OK. A LINE OF CONVECTION IS
   ONGOING ALONG THE FRONT AND AHEAD OF THE DRYLINE WHERE SFC DEWPOINTS
   ARE IN THE LOWER TO MID 60S F. SUPERCELLS ARE PRESENT ALONG THE SRN
   EDGE OF THE LINE. AT UPPER-LEVELS...A MID-LEVEL SPEED MAX OF 50 KT
   IS LOCATED ACROSS CNTRL AND NERN OK. THIS FEATURE IS RESULTING IN
   MODERATE DEEP LAYER SHEAR AND THIS WILL CONTINUE A THREAT FOR
   SUPERCELLS AS THE LINE MOVES EWD INTO AR AND SW MO THIS EVENING.
   LOW-LEVEL DIRECTIONAL SHEAR IS PRESENT AHEAD OF THE LINE AND
   FORECAST SOUNDINGS IN THIS AREA SHOW SFC TO 3 KM SHEAR VALUES AROUND
   300 M2/S2. THIS COMBINED WITH A STRONG LOW-LEVEL JET WILL CONTINUE A
   TORNADO THREAT THROUGH THE EVENING WITH AN ISOLATED WIND DAMAGE
   THREAT CONTINUING OVERNIGHT.
   
   OBJECTIVE ANALYSIS CURRENTLY SHOWS A PLUME OF STEEP MID-LEVEL LAPSE
   RATES SPREADING EWD ACROSS KS AND OK. AS THIS FEATURE CONTINUES TO
   MOVE TOWARD THE LOWER MS VALLEY OVERNIGHT...AN ISOLATED LARGE HAIL
   THREAT SHOULD CONTINUE WITH THE STRONGER CELLS IN THE LINE.
   
   ...LOWER MI/OH VALLEY/UPPER MIDWEST...
   
   A CLUSTER OF TORNADIC MINI-SUPERCELLS IS CURRENTLY ONGOING ACROSS
   NERN IL AND NRN IND. THIS CONVECTION HAS FORMED ALONG A WARM FRONT
   MOVING QUICKLY NEWD THROUGH THE OH VALLEY. AS THE CONVECTION MOVES
   NEWD AHEAD OF THE FRONT...IT WILL BECOME ELEVATED LATE THIS EVENING
   ACROSS SRN WI AND SRN LOWER MI. STILL A LARGE HAIL THREAT WILL EXIST
   WITH MODERATE DEEP LAYER SHEAR AND 500 MB TEMPS IN THE -14 TO -16C
   RANGE. ALTHOUGH THE TORNADO THREAT SHOULD DIMINISH...AN ISOLATED
   MARGINAL WIND DAMAGE THREAT MAY EXIST WITH THE STRONGER DOWNDRAFTS.
   
   ..BROYLES.. 04/21/2004
   
   ...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 0600Z