STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK
DAY 1 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWE46 KWNS.
VALID 310100Z - 311200Z
THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM
130 NE CMX 40 E ESC 40 NW MKG 15 SSE MKE 25 SSW RFD 30 NE OTM
25 S TOP 25 ESE MHK 45 SE OMA 15 WSW LSE 10 SSW MSP 35 NNE RWF
55 SW AXN 30 NNE ABR 40 WSW JMS 20 NNW JMS 30 SW GFK 45 S TVF
30 ESE BJI 25 WSW ELO 25 ENE ELO.
GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 25 N MRY 35 SSE EKA
25 SSW MFR 30 WSW 4LW 30 NE RNO 40 NE U31 40 N ELY 30 ESE DPG
30 ESE OGD 50 ESE EVW 35 SSE RWL 20 NE CYS 35 SE AIA 40 S ANW
15 ESE OFK 35 W SPW 30 ENE BKX 50 SE BIS 50 NNE MOT.
GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 70 SSW GBN
50 ESE BLH 30 NNE BLH 60 WNW EED 30 NNW DAG 30 SSW DAG 15 S IPL.
GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 50 ESE ANJ
20 ESE BEH 35 SSW CGX 20 WNW UIN 35 W COU 55 SSW SZL 20 W EMP
25 N RSL 35 SSE GLD 15 S LAA 15 SW CAO 40 ESE CVS 75 NW ABI
35 NNE MWL 20 E DUA 30 WNW PGO 25 NW FYV 20 SE SGF 10 SE VIH
35 SSW STL 15 SE BLV 45 SSE MTO 15 S IND 20 WNW DAY 35 S FDY
25 ENE TOL.
GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 10 WSW ERI 25 S FKL
25 NE EKN 25 S SSU 35 SSW PSK 25 NNW GSO 25 E DAN 50 WSW RIC
40 N RIC 40 NW SBY 10 SSW ACY.
GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 25 SE HUM 25 WSW BTR
50 NNW BPT 45 WNW HOU 40 WNW VCT 20 NNW NIR ALI 15 ESE MFE.
...UPPER MS VALLEY/WRN GREAT LAKES...
STRONG CLOSED/CUTOFF LOW WILL REMAIN NEARLY STATIONARY ACROSS NRN
MN TONIGHT WITH COMPACT IMPULSES AND ASSOCIATED SPEED MAXIMA
ROTATING CYCLONICALLY AROUND THIS FEATURE ATOP WARM/UNSTABLE
AIRMASS FROM CNTRL MN ACROSS WI AND LAKE MI/UPPER MI. ZONE OF
MODEST LOW LEVEL WARM AIR ADVECTION/ASCENT COINCIDENT WITH SURFACE
INSTABILITY AXIS FROM NERN KS NEWD TO WI SHOULD CONTINUE TO PROMOTE
TSTM DEVELOPMENT INTO THE NIGHT. EVENING SOUNDINGS WITHIN THIS AXIS
INDICATED 0-6KM SHEAR OF 30-40 KT AND FAVORABLY STEEP 850-500MB
LAPSE RATES AROUND 7 C/KM SUPPORTIVE OF PERSISTENT/INTENSE UPDRAFTS
AND HAIL. IN ADDITION TOP SOUNDING SHOWED WELL MIXED BOUNDARY LAYER
AIRMASS WITH 30F T/TD SPREAD. ISOLD STORMS IN THIS ENVIRONMENT
COULD PRODUCE STRONG...POSSIBLY SEVERE...DOWNDRAFTS.
...TX TO LOWER MS VALLEY...
STRONG SURFACE THETA-E GRADIENT DEFINES EFFECTIVE FRONTAL ZONE FROM
SAT AREA NEWD THROUGH EAST TX...ACROSS LA...AND INTO SWRN MS THIS
EVENING WITH VERY WARM AND UNSTABLE AIRMASS ALONG/SOUTH OF THIS
BOUNDARY. FRONTOGENESIS/CONVERGENCE AHEAD OF THE BOUNDARY AND
MESOSCALE FORCING FOR ASCENT NEAR DEEPER COLD POOLS SHOULD SPUR
ADDITIONAL CONVECTIVE DEVELOPMENT OVER THE NEXT FEW HOURS WITHIN
WEAKLY CAPPED ENVIRONMENT. WHILE A FEW OF THESE STORMS MAY PRODUCE
ISOLD DOWNBURSTS...EVENING SOUNDINGS DEPICT A VERY WEAKLY SHEARED
WIND PROFILE WITH JAN AND LCH BOTH SHOWING WINDS AOB 10KT THROUGH
300MB. FWD SOUNDING DOES SHOW A MID LEVEL NWLY CURRENT SUGGESTING
FRONTAL ZONE MAY SHIFT SLOWLY SEWD TOWARD THE GULF COAST OVERNIGHT.
...SOUTHWEST...
ESELY MEAN LAYER WIND AND WEAK ELY WAVES CONTINUE TO ENHANCE STORM
DEVELOPMENT ACROSS SERN AND NRN AZ TONIGHT. WHILE FLOW...
INSTABILITY...AND FORCING DO NOT APPEAR TO BE QUITE AS PRONOUNCED
AS LAST NIGHT...A FEW STORMS COULD STILL PRODUCE ISOLD STRONG
DOWNBURST WINDS...AND/OR MARGINALLY SEVERE HAIL.
..CARBIN.. 07/31/03
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED FOR 0600Z
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