Skip Navigation Links www.nws.noaa.gov 
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
Storm Prediction Center
 
   

Search SPC
 

Jul- 1-2003 1300 UTC Day 1 Convective Outlook
Categorical Graphic
1300 UTC Day 1 Outlook Graphic
      
Probabilistic Graphics (more info)
Tornado Damaging Wind Large Hail
1300 UTC Tornado probabilities graphic   1300 UTC Damaging wind probabilities graphic   1300 UTC Large hail probabilities graphic
(Select thumbnails to view full images)
   
   STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK 
   DAY 1 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWE46 KWNS.
   
   VALID 011300Z - 021200Z
   
   THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM
   25 SSE CSV TYS 30 SSE SPA 20 SE AGS 45 ENE ABY 20 E MAI 35 NE CEW
   15 SW SEM 25 SSW HSV 55 WNW CHA 25 SSE CSV.
   
   THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM
   40 E INL 45 NW BRD 55 N ATY 35 SSE PHP 30 SW PHP 30 NE RAP
   60 NNE ISN.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 20 ENE DLH
   20 ENE STC 30 S RWF 20 ENE SUX 10 WNW OLU 20 S LBF 20 NNW GLD
   30 NNW LAA 55 WSW CVS 10 SW CNM 25 SW INK 30 SE MAF 65 NW ABI
   25 W LTS 35 WNW PNC 15 SSW FLV 20 SW LWD 30 ESE DSM 20 SE CID
   45 E MLI 30 SW SBN 35 NNE FWA CLE 10 ESE FKL 35 SW IPT 30 NE CXY
   20 NW PHL 25 ENE ACY ...CONT... 70 WSW TUS 45 W SAD 35 S GUP
   30 NNE DRO 25 ESE EGE 40 NW LAR 50 N CPR 30 N WRL 40 W COD
   50 SW MQM 70 SSE S80 20 ESE LWS 30 ENE 3TH 50 NNE FCA.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 15 SW PWM 15 N LCI
   10 SW MPV 15 SE SLK 35 N ART.
   
   ...NRN PLAINS INTO NWRN MN...
   AN UPPER RIDGE WILL REMAIN OVER THE CENTRAL-NRN PLAINS THROUGH THE
   DAY...VERY STEEP LAPSE RATES SPREADING ACROSS THIS REGION AND
   SUBSEQUENTLY KEEPING MUCH OF THE REGION CAPPED THROUGH THE
   AFTERNOON.  SLY LOW-LEVEL FLOW WILL ADVECT MOISTURE NWD WITH UPPER
   60S SURFACE DEWPOINTS REACHING THE CENTRAL-ERN DAKOTAS LATER TODAY.
   THE STEEP LAPSE RATES EXPECTED ABOVE THE INCREASING LOW-LEVEL
   MOISTURE AND STRONG SURFACE HEATING WILL RESULT IN MODERATE
   INSTABILITY.  A SHORT WAVE TROUGH MOVING INTO THE DAKOTAS AFTER 00Z
   WILL AID IN INITIATING CONVECTION ALONG A TROUGH PROGGED TO BE IN
   THE WRN DAKOTAS BY 00Z.  STORMS WILL LIKELY SPREAD NEWD INTO ERN
   ND/NRN SD AND EVENTUALLY REACHING NWRN MN OVERNIGHT.  AS THE SHORT
   WAVE TROUGH TOPS THE RIDGE OVER THE DAKOTAS THIS EVENING AND
   OVERNIGHT...A STRENGTHENING SLY LLJ AND INCREASING DEEP LAYER SHEAR
   WILL SUPPORT ORGANIZED STRONG TO SEVERE STORMS.
   
   FURTHER SOUTH ALONG THE LEE TROUGH INTO WRN NEB AND FAR NERN CO...
   STRONG SURFACE HEATING INTO THE UPPER 90S TO NEAR 100 MAY BREAK THE
   CAP LATER THIS AFTERNOON AS INDICATED BY MODELS WITH CONVECTION
   FORMING OVER THIS AREA.  ANY STORMS THAT CAN DEVELOP WILL LIKELY
   BECOME SEVERE GIVEN SUFFICIENT DEEP LAYER SHEAR COMBINED WITH
   MODERATE INSTABILITY.  THERMODYNAMIC PROFILES ACROSS THIS AREA
   FAVOR A DAMAGING WIND THREAT WITH STEEP LAPSE RATES ALSO SUPPORTING
   A HAIL THREAT.
   
   ...SERN STATES...
   EARLY MORNING SURFACE ANALYSIS SHOWS THE SURFACE LOW ASSOCIATED
   WITH THE REMNANTS OF T.S. BILL OVER WEST CENTRAL AL NEAR MEI...
   WHILE IR IMAGERY SHOWS THE MID-UPPER LEVEL CIRCULATION OVER CENTRAL
   AL.  LATEST TPC GUIDANCE INDICATES THE SURFACE LOW WILL MOVE NEWD
   THROUGH CENTRAL-NRN AL TODAY...REACHING SERN TN BY 12Z WEDNESDAY.
   ENHANCED LOW-LEVEL CIRCULATION WITH THIS TROPICAL SYSTEM COMBINED
   WITH VERY LOW-LCLS AND A MOIST AIR MASS WILL AID IN A THREAT FOR
   ISOLATED TORNADOES ALONG AND EAST OF THE TRACK OF THE REMNANTS OF
   T.S. BILL. 
   
   ...NRN NEW ENGLAND...
   SHORT WAVE TROUGH/MID-LEVEL WNWLY 50 KT SPEED MAX...CURRENTLY OVER
   ONTARIO/LAKE SUPERIOR PER WV IMAGERY...WILL MOVE SEWD AND ACROSS
   NRN NEW ENGLAND LATE THIS AFTERNOON/EVENING INCREASING DEEP LAYER
   SHEAR.  SURFACE HEATING COMBINED WITH SURFACE DEWPOINTS IN THE 50S
   AND 6.5 TO 7 C/KM LAPSE RATES SPREADING ACROSS THIS REGION THIS
   AFTERNOON AND EVENING WILL RESULT IN MARGINAL INSTABILITY /MLCAPE
   500-1000 J/KG/.  SUFFICIENT DEEP LAYER SHEAR COMBINED WITH THE
   MARGINAL INSTABILITY WILL SUPPORT ISOLATED STRONG STORMS AS
   THUNDERSTORMS MOVE FROM QUEBEC INTO UPSTATE NY TO NRN MAINE THIS
   AFTERNOON/EVENING.
   
   ...WRN-CENTRAL MT...
   AN UPPER TROUGH WILL MOVE EWD INTO WRN CANADA AND THE NRN ROCKIES
   THIS PERIOD WITH 40-50 KT SWLY FLOW EXTENDING FROM NRN CA INTO WRN-
   CENTRAL MT.  ALTHOUGH MODELS SHOW CONVECTION DEVELOPING OVER THE
   HIGHER TERRAIN OF WRN MT THIS AFTERNOON AND EVENING...WEAK
   INSTABILITY IS EXPECTED TO LIMIT THE POTENTIAL FOR SEVERE STORMS. 
    
   ..PETERS/CROSBIE.. 07/01/03
   
   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED FOR 1630Z
        
Top/Latest Day 2 Outlook/Today's Outlooks/Forecast Products/Home