Severe Thunderstorm Warning 74, NWS Charleston, WV

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON WV
330 PM EDT WED JUN 23 2010

.SYNOPSIS...
SCATTERED SHOWERS AND THUNDERSTORMS THIS EVENING IN HOT...SOUPY
AIRMASS. COLD FRONT PUSHES SOUTHEAST THROUGH REGION THURSDAY. HIGH
PRESSURE BUILDS IN FOR FRIDAY AND SATURDAY.

&&

.NEAR TERM /THROUGH THURSDAY/...
STORMS HAVE BEEN FORMING ALONG EDGES OF COLD POOL LEFT BY MORNING
ACTIVITY ACROSS THE FAR SOUTHWEST CWA...WITH HELP FROM OLD MCV.
ALSO...THERE ARE SCATTERED STORM IN SOUTHEAST OHIO AS AIRMASS HAS
HAD TIME TO RECOVER BEHIND THE MORNING RAINS.  RAIN-COOLED AIR ACROSS
HEART OF CWA HAS PREVENTED MUCH CU TO THIS POINT...BUT EVEN THIS
AREA HAS TIME TO RECOVER.

EXPECT MOST OF THE ACTIVITY FROM CURRENT GREAT LAKES MCS TO REMAIN
TO THE NORTH THIS EVENING...ALTHOUGH CORFIDI VECTORS SUGGEST ANY
CELLS ON THE FRINGES COULD PROPAGATE INTO THE NORTHERN CWA LATE THIS
AFTERNOON OR EARLY THIS EVENING.  WHATEVER FORMS ACROSS NORTHERN
ILLINOIS OVER THE NEXT FEW HOURS WILL HAVE TO BE WATCHED AS
WELL...ALTHOUGH FLOW WILL ALSO FAVOR A MORE NORTHERLY TRAJECTORY FOR
THIS CLUSTER AS WELL.  FOR NOW...EXPECTING CURRENT CWA ACTIVITY TO
TREK SLOWLY EASTWARD SIMILAR TO 3KM HRRR MODEL...BEFORE LARGELY
DISSIPATING BY LATE EVENING DUE TO LOSS OF HEATING.  KEEPING
SCATTERED POPS FOR THE MOST PART.  WITH WEAK FLOW AND HIGH FREEZING
LEVELS...THINK ANY SEVERE THREAT IS MAINLY CONFINED TO DOWNBURST
WIND DAMAGE.

GOING FOR A QUIET PERIOD FROM LATE EVENING THROUGH DAWN OR
SO...BARRING ARRIVAL OF ILLINOIS STORMS. INCREASING SURFACE PRESSURE
GRADIENT SHOULD KEEP BOUNDARY LAYER FAIRLY MIXED AND PREVENT MUCH
FOG FORMATION. NEXT ISSUE IS COLD FRONTAL BOUNDARY...SLATED TO
ARRIVE TOMORROW.  MUCH OF THE PRECIPITATION MAY OCCUR WITH A
PREFRONTAL TROUGH WHICH WILL SWING INTO SOUTHEAST OHIO AFTER
12Z...THROUGH CRW/CKB BY 18Z...AND THROUGH THE MOUNTAINS BY 00Z.
KEPT HIGH CHANCE OR LOW LIKELY POPS.  MAIN SHORTWAVE REMAINS WELL
OFF TO THE NORTH AND FRONT GETS STRETCHED OUT A BIT.  NOT PICTURING
SEVERE WEATHER OR HEAVY RAINFALL HERE.

LIKED A GENERAL MAV/MET BLEND FOR OVERNIGHT LOWS.  TENDED TO GO AT
OR A TOUCH BELOW MOS FOR THURSDAY GIVEN EXPECTED CLOUDS AND
SHOWERS.

&&

.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY NIGHT/...
MODELS CONTINUE THE PATTERN OF OUR AREA BEING ON THE SOUTHERN EDGE
OF THE WESTERLIES...WITH SHORT WAVES RIDING EAST SOUTHEAST ACROSS
THE GREAT LAKES AND NEW ENGLAND. THE SHORT WAVE THAT WILL PUSH A
VERY WEAK COOL FRONT SOUTH AND EAST OF OUR AREA BY EARLY THURSDAY
NIGHT WILL TAKE THE DEEP MOISTURE AND DYNAMICS WITH IT. SO EVEN IF
THE FRONT ITSELF GETS HUNG UP IN THE MOUNTAINS...GOOD DRYING ALOFT
WILL PUSH THE STORMS EAST OF THE MOUNTAINS THURSDAY NIGHT.

HIGH PRESSURE WILL DOMINATE FRIDAY AND SATURDAY WITH MUCH DRIER
AIR. HOWEVER...MOST OF THE COOLER AIR STAYS OVER THE GREAT LAKES AND
NEW ENGLAND...SO HIGH TEMPERATURES FRIDAY AND SATURDAY WILL STILL
BE NEAR 90 DEGREES. ON THE OTHER HAND...NIGHTS WILL BE MUCH COOLER
WITH LOWS CLOSER TO 60 DEGREES...DUE TO BETTER RADIATIONAL COOLING
IN THE DRIER AIR.

&&

.LONG TERM /SUNDAY THROUGH TUESDAY/...
BY SUNDAY THE HIGH MOVES OFF...AND HOTTER TEMPS AND INCREASING
HUMIDITY MAY BRING ISOLATED AFTERNOON STORMS.

MODELS SIMILARLY TAKE A STRONGER COOL FRONT ACROSS THE AREA ON
MONDAY...AS ANOTHER STRONGER SHORT WAVE DROPS ACROSS THE GREAT LAKES
AND NEW ENGLAND. THIS STRONGER SHORT WAVE WITH BETTER UPPER DYNAMICS
WILL ALLOW THIS FRONT TO MOVE RIGHT ACROSS...ACCOMPANIED BY
SCATTERED STORMS. THUS...A HOT AND HUMID MONDAY WILL BE FOLLOWED BY
NOTICEABLY COOLER AND DRIER CONDITIONS BY TUESDAY AND WEDNESDAY.
LOOK FOR HIGHS IN THE 80S.

&&

.AVIATION /19Z WEDNESDAY THROUGH MONDAY/...
BEST AREAS FOR CONVECTIVE DEVELOPMENT THIS AFTERNOON ARE IN
SOUTHEAST OHIO/NORTHEAST KENTUCKY...DUE TO BOUNDARY LEFT BY EARLIER
RAINFALL...AND IN THE COALFIELDS OF WV/VA WHERE THE BEST INSTABILITY
LIES.  LOWEST CHANCES ACROSS NORTHCENTRAL AND NORTHEAST WV...AT
LEAST INITIALLY.  STILL CANNOT RULE OUT A STORM ANYWHERE.  INCLUDED
CB BUT NOT PREVAILING THUNDER IN TAFS...AS ANY STORM SHOULD BE
FAIRLY BRIEF AT BEST.  ACTIVITY SHOULD WANE DURING THE EVENING
HOURS.  MAINLY VFR OVERNIGHT WITH LITTLE FOG DUE TO A FAIRLY WELL
MIXED BOUNDARY LAYER.  FRONTAL BOUNDARY CROSSES INTO SOUTHEAST OHIO
AFTER 12Z AND APPROACHES CRW/CKB BY 18Z.  EXPECTING AT LEAST A
BROKEN LINE OF SHRA/TSRA WITH THE FRONT.  KEPT ANY SHRA MVFR FOR NOW
BUT BRIEF IFR IS POSSIBLE.

AFTER 18Z THURSDAY...
SOME BRIEF IFR CONDITIONS IN THUNDERSTORMS THURSDAY AFTERNOON INTO
THE EVENING.

&&

.RLX WATCHES/WARNINGS/ADVISORIES...
WV...NONE.
OH...NONE.
KY...NONE.
VA...NONE.

&&

SYNOPSIS...CL/JMV
NEAR TERM...CL
SHORT TERM...JMV
LONG TERM...JMV
AVIATION...CL

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON WV
404 PM EDT WED JUN 23 2010

KYZ101>103-105-OHZ066-067-075-076-083>087-VAZ003-004-WVZ005>011-
013>020-024>040-046-047-242015-
GREENUP-CARTER-BOYD-LAWRENCE KY-PERRY-MORGAN-ATHENS-WASHINGTON-
JACKSON OH-VINTON-MEIGS-GALLIA-LAWRENCE OH-DICKENSON-BUCHANAN-WAYNE-
CABELL-MASON-JACKSON WV-WOOD-PLEASANTS-TYLER-LINCOLN-PUTNAM-KANAWHA-
ROANE-WIRT-CALHOUN-RITCHIE-DODDRIDGE-MINGO-LOGAN-BOONE-CLAY-BRAXTON-
GILMER-LEWIS-HARRISON-TAYLOR-MCDOWELL-WYOMING-RALEIGH-FAYETTE-
NICHOLAS-WEBSTER-UPSHUR-BARBOUR-POCAHONTAS-RANDOLPH-
404 PM EDT WED JUN 23 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST
KENTUCKY...SOUTHEAST OHIO...SOUTHWEST VIRGINIA...CENTRAL WEST
VIRGINIA...NORTHERN WEST VIRGINIA...SOUTHERN WEST VIRGINIA AND
WESTERN WEST VIRGINIA.

.DAY ONE...TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING.
THESE STORMS COULD PRODUCE VERY GUSTY WINDS AND LARGE HAIL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
411 PM EDT WED JUN 23 2010

WVZ006-013>015-026-232115-
BOONE WV-CABELL WV-KANAWHA WV-LINCOLN WV-PUTNAM WV-
411 PM EDT WED JUN 23 2010

...A STRONG THUNDERSTORM WITH GUSTY WINDS WILL AFFECT NORTHERN
LINCOLN...NORTHWESTERN BOONE...SOUTHEASTERN CABELL...SOUTHWESTERN
PUTNAM AND WEST CENTRAL KANAWHA COUNTIES...

AT 408 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES WEST OF
HAMLIN...MOVING EAST AT 20 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM.

THIS STORM WILL BE NEAR HAMLIN AROUND 430 PM...SWEETLAND AROUND 440
PM...GRIFFITHSVILLE AROUND 450 PM...ALKOL AROUND 500 PM...SOD AROUND
510 PM AND ALUM CREEK AROUND 520 PM.

THIS WILL IMPACT

I-64 BETWEEN MILE MARKERS 52 AND 56 IN WEST VIRGINIA.

PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 3829 8231 3831 8227 3833 8230 3838 8230
      3837 8167 3810 8170 3819 8228 3822 8226
      3824 8230 3826 8231

13

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