STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK
DAY 1 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWE46 KWNS.
VALID 151630Z - 161200Z
THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM CRP
15 SSE COT 35 WNW HDO 35 NNW SAT 35 WSW CLL 35 NW HOU 25 SW BPT.
THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM
35 E DEN 10 NNW DEN 35 SSE LAR 35 NNW CYS 45 SSW GCC 35 W SHR
30 SE BIL 65 WSW DIK 15 SSE Y22 25 SE PHP 25 NNE AKO 35 E DEN.
THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM
30 ESE JBR 30 E HRO 40 SSW TBN 25 ENE ALN 15 NE IND 25 NE LUK
30 SW 5I3 30 NNW CSV 30 ESE JBR.
THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM
10 WSW MSS 35 NNE UCA 10 NNE BGM 35 SSE ELM 20 NE PSB 30 SSE FKL
25 SSW YNG 20 WNW CLE.
THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM
75 S GBN 35 W GBN 75 ENE BLH 50 WSW PRC 30 WNW PRC 40 E PRC
50 W SOW 40 NNW SAD 35 ESE DUG.
GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 50 NNE BML LCI
20 WNW ORH 10 SSW ISP.
GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 35 S RAL 65 WNW EED
65 S SGU 45 WSW PGA 25 NNE PGA 35 SSE CNY 35 WNW GJT 35 NNE VEL
25 NNW RKS 30 ESE BPI 45 W BPI 35 E PIH 40 ESE SUN 40 SE BOI
65 WSW BOI 50 S BNO 30 SE 4LW 50 N SVE 50 NE RBL 35 NW RBL
15 NNE ACV 30 ENE OTH SLE 20 W SEA 10 NNW BLI.
GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 35 W INL 10 SSW FAR
40 N ATY 35 E MHE 35 NNW OFK 10 ENE GRI 45 SW EAR 15 N GCK
10 S LBB 35 S MAF 65 NE P07 65 SSE BWD 40 ESE ACT 35 ENE LFK
50 ESE SHV 20 E SGF 15 NW COU 15 ENE DEC 40 S SBN 30 ENE MKG
60 W ANJ.
...SYNOPSIS...
LARGE UPPER HIGH DOMINATES WRN U.S. WITH WLYS RIDING ACROSS THE TOP
THRU NRN ROCKIES AND THEN SEWD ACROSS UPPER MS VALLEY AND GREAT
LAKES. VIGOROUS S/WV TROUGH AND ASSOCIATED MID LEVEL WIND MAX
TRACKING EWD FROM WRN GREAT LAKES TO WRN QUEBEC TONIGHT.
AT THE SURFACE LOW PRESSURE NOW MOVING ACROSS NRN MI WILL DEEPEN
INTO WRN QUEBEC TONIGHT WITH THE ASSOCIATED COLD FRONT NOW FROM LWR
MI SWWD ACROSS CENTRAL MO INTO NRN TX PANHANDLE. COLD FRONT WILL
MOVE EWD INTO WRN NY/PA THIS EVENING WHILE SRN END BECOMES
STATIONARY ALONG KS/OK BORDER INTO NERN NM.
HURRICANE CLAUDETTE NOW MOVING ONSHORE CENTRAL TX COAST FORECASTED
TO CONTINUE WWD AND WEAKEN BUT FAVORABLE SHEAR FOR ISOLATED
TORNADOES WILL PERSIST.
ELY FLOW OF VERY WARM/STEEP LAPSE RATES PERSISTS TO S OF LARGE
UPPER HIGH ACROSS AZ.
...NERN U.S...
HAVE ADDED A SLIGHT RISK FOR LATE THIS AFTERNOON/EVENING ACROSS WRN
NY/NRN PA/NERN OH AS ETA/ETAKF INDICATE VIGOROUS WIND FIELD
DEVELOPING ALONG AND AHEAD OF COLD FRONT AS SURFACE LOW DEEPENS
ACROSS SERN ONTARIO. WHILE INSTABILITY WILL BE LIMITED THE FRONTAL
FORCING AND LARGE SCALE ASCENT ON THE NOSE OF A VIGOROUS MID LEVEL
JET NOW MOVING ACROSS LWR MI EXPECTED TO BE SUFFICIENT FOR
THUNDERSTORMS BY MID/LATE AFTERNOON. 40-50KT OF DEEP LAYER SHEAR
AND MLCAPES UP TO 1000 J/KG SUPPORTS A WIND DAMAGE POTENTIAL AS
CONVECTION DEVELOPS INTO SHORT LINE SEGMENTS AND BOWS MOVING
RAPIDLY EWD INTO WRN NY THIS EVENING. REF MCD 1854.
...MID MS/LWR OH VALLEY...
CURRENT STRONG THUNDERSTORMS MOVING SEWD THRU SRN IL/IND WEAKENING.
VERY MOIST AND UNSTABLE AIRMASS WILL PERSIST AHEAD OF THE COLD
FRONT NOW MOVING SEWD ACROSS CENTRAL IL. AFTERNOON HEATING WILL
RAISE MLCAPES TO AOA 3000 J/KG COUPLED WITH VEERING SHEAR PROFILES
SUPPORTING REDEVELOPMENT OF SEVERE THUNDERSTORMS. PRIMARY THREAT
WILL BE LARGE HAIL AND WET MICRO-BURSTS. INTENSITY WILL DIMINISH
WITH LOSS OF HEATING THIS EVENING.
...AZ...
WHILE THERMAL PROFILES HAVE CHANGED LITTLE IN 12Z AZ
SOUNDINGS...THERE HAS BEEN AN INCREASE IN PRECIPITABLE WATER UP TO
1.4 INCHES AT PHX AND 1.1 AT TUS. RESULT IS THAT BY MAX HEATING
THERE WILL BE DRY ADIABATIC LAPSE RATES AOA 500MB WITH CAPES AROUND
1500 J/KG WITH A VERY HIGH LFC OF 600MB OR HIGHER. EXPECT
THUNDERSTORMS DEVELOPING OVER THE HIGHER TERRAIN FROM THE RIM SWD
THIS AFTERNOON...WITH PROPAGATION IN PREVAILING ELY FLOW INTO LOWER
DESERT VALLEYS. POTENTIAL WITH THE EXPECTED MDT INSTABILITY FOR
MORE OF A THREAT FOR STORMS DEVELOPING INTO THE DESERTS THIS
EVENING. STRONG DOWNBURSTS AND DUST STORMS WILL BE QUITE LIKELY
VICINITY ANY STORMS ABLE TO DEVELOP INTO THE LOWER ELEVATIONS.
...CENTRAL HIGH PLAINS...
SUFFICIENT LOW LEVEL MOISTURE RETURNING NWD ON W SIDE OF NRN PLAINS
SURFACE HIGH FOR MDT INSTABILITY THIS AFTERNOON OVER HIGH PLAINS
FROM ERN CO NWD THRU ERN WY AND WRN NEB/SD. CAP WILL WEAKEN WITH
STRONG HEATING FOR INITIATION OF THUNDERSTORMS OFF HIGHER TERRAIN
ERN CO/WY. STORMS WILL BE HIGH BASED ENHANCING DOWNBURST POTENTIAL
WITH GRADUAL DEVELOPMENT EWD INTO HIGH PLAINS THIS EVENING PRIOR TO
WEAKENING AFTER DARK.
..HALES/TAYLOR.. 07/15/03
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED FOR 2000Z
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