Special Weather Statement, NWS Wilmington, OH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
350 AM EDT SUN AUG 7 2011

.SYNOPSIS...
SCATTERED THUNDERSTORMS WILL BE POSSIBLE THIS MORNING AS A WEAK
BOUNDARY SAGS DOWN ACROSS THE REGION. THE THREAT FOR THUNDERSTORMS
WILL RETURN LATE THIS AFTERNOON INTO TONIGHT AS A WEAK COLD FRONT
PUSHES INTO THE OHIO VALLEY OVERNIGHT. THIS WILL USHER IN A SLIGHTLY
COOLER AIRMASS FOR MONDAY.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
A WEAK BOUNDARY IS SAGGING DOWN ACROSS CENTRAL OHIO AND THIS IS
HELPING TO KEEP A NARROW LINE OF THUNDERSTORMS GOING...CURRENTLY
STRETCHING FROM WAYNE COUNTY INDIANA OVER TOWARD DELAWARE COUNTY
OHIO. MEANWHILE...THUNDERSTORMS HAVE ALSO DEVELOPED ACROSS
SOUTHERN INDIANA ALONG THE LEADING EDGE OF A WEAK 925-850 MB LOW
LEVEL JET. THESE STORMS APPEAR TO BE CONGEALING INTO MORE OF A
CLUSTER OF THUNDERSTORMS. THE LATEST RUC AND HRRR ARE STILL
SLIDING THESE STORMS EAST SOUTHEAST ACROSS SOUTHERN PORTIONS OF
OUR FA THROUGH MID MORNING...AND POSSIBLY MERGING THEM INTO THE
STORMS PUSHING DOWN ACROSS NORTHERN PORTIONS OF FA ATTM.
HOWEVER...THE AIRMASS ACROSS OUR AREA IS MORE STABLE SO WOULD NOT
BE SURPRISED IF WE SEE A GRADUAL WEAKENING TREND AS THEY PUSH
EAST INTO OUR AREA. ONCE THESE STORMS PUSH THROUGH...WE WILL
LIKELY GET INTO A LULL IN PCPN THROUGH EARLY AFTERNOON AHEAD OF A
COLD FRONT DROPPING DOWN FROM THE NORTHWEST. THIS SHOULD ALLOW FOR
TEMPERATURES TO CLIMB UP CLOSE TO 90 DEGREES. WITH DEWPOINTS UP
INTO THE LOWER 70S...HEAT INDICES WILL BE PUSHING THE HEAT
ADVISORY CRITERIA OF 100 DEGREES ACROSS OUR SOUTH. SINCE IT WILL
BE MARGINAL AND SHOULD ONLY OCCUR FOR AN HOUR OR TWO IF IT DOES
MAKE IT...WILL HOLD OFF ON AN ADVISORY AND JUST MENTION THE
POSSIBILITY IN THE HWO.
&&

.SHORT TERM /6 PM THIS EVENING THROUGH TUESDAY NIGHT/...
WESTERLY FLOW ALOFT WILL TRANSITION INTO MORE OF A NORTHWEST FLOW
PATTERN THROUGH TUESDAY. THIS WILL ALLOW FOR A COUPLE OF WEAK COLD
FRONTS TO PUSH DOWN INTO THE AREA THROUGH THE SHORT TERM PERIOD.
THE FIRST ONE TONIGHT WILL WASH OUT ACROSS OUR FA THROUGH MONDAY
MORNING. MOISTURE WITH THIS FRONT REMAINS FAIRLY LIMITED AND
FORCING IS WEAK SO THIS SHOULD HELP KEEP PCPN CHANCES RELATIVELY
LOW OVERNIGHT. WE THEN START TO GET INTO SOME INCREASING
SOUTHWESTERLY FLOW IN THE LOW LEVELS LATER MONDAY INTO MONDAY
NIGHT AHEAD OF THE NEXT COLD FRONT PUSHING DOWN INTO THE AREA.
THIS WILL RESULT A LITTLE DEEPER MOISTURE ACROSS OUR AREAS SO
EXPECT A BETTER CHANCE OF THUNDERSTORMS MONDAY NIGHT INTO TUESDAY.
AS WE TRANSITION INTO THE NORTHWEST FLOW PATTERN...WE SHOULD SEE
SLIGHTLY COOLER TEMPERATURES MONDAY INTO TUESDAY WITH AFTERNOON
HIGHS GENERALLY IN THE 80S. &&

.LONG TERM /WEDNESDAY THROUGH SATURDAY/...
FOR THE LATTER PART OF THE WEEK...RIDGE BUILDS INTO THE WESTERN
US AGAIN...WITH FCST AREA ON LEEWARD SIDE OF RIDGE. MORE MODERATE
TEMPERATURES AS A RESULT WITH GFS/GEFS AND ECMWF BRINGING NOTHING
HIGHER THAN 16-18C H8 TEMPS THROUGH SAT. MODELS IN GENERAL
AGREEMENT OF SFC RIDGING/DRY CONDITIONS UNTIL ANOTHER DISTURBANCE
PUSHES THROUGH THE GREAT LAKES AND FOR LATE SATURDAY.

&&

.AVIATION /07Z SUNDAY THROUGH THURSDAY/...
SHOWERS AND THUNDERSTORMS WILL AFFECT KCVG/KDAY/KLUK/KILN NOW
THROUGH 10Z. MVFR/IFR CONDITIONS EXPECTED IN HEAVIER THUNDERSTORMS.
THIS ACTIVITY MAY HOLD TOGETHER LONG ENOUGH TO MAKE IT TO KCMH/KLCK
AFTER 07Z THIS MORNING. MOST OF THE PRECIPITATION SHOULD BE EAST OF
THE TAF SITES BY SUNRISE TODAY. IN THE WAKE OF
PRECIPITATION...FOG/MIST WILL DEVELOP BEFORE SUNRISE.

ISOLATED SHOWERS AND THUNDERSTORMS WILL REDEVELOP LATE IN THE
AFTERNOON AHEAD OF AN APPROACHING FRONTAL BOUNDARY. FORECAST
COVERAGE OF THESE STORMS APPEAR TO BE SOMEWHAT LIMITED AT THIS TIME.

OUTLOOK...A CHANCE OF THUNDERSTORMS SUNDAY NIGHT.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...NONE.
KY...NONE.
IN...NONE.

&&

SYNOPSIS...JGL
NEAR TERM...JGL
SHORT TERM...JGL
LONG TERM...JDR
AVIATION...LATTO

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE WILMINGTON OH
426 AM EDT SUN AUG 7 2011

INZ050-058-059-066-OHZ026-034-035-042>046-051>056-060>065-070>074-
080-082-080830-
WAYNE-FAYETTE IN-UNION IN-FRANKLIN IN-HARDIN-MERCER-AUGLAIZE-DARKE-
SHELBY-LOGAN-UNION OH-DELAWARE-MIAMI-CHAMPAIGN-CLARK-MADISON-
FRANKLIN OH-LICKING-PREBLE-MONTGOMERY-GREENE-FAYETTE OH-PICKAWAY-
FAIRFIELD-BUTLER-WARREN-CLINTON-ROSS-HOCKING-HIGHLAND-PIKE-
426 AM EDT SUN AUG 7 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL
INDIANA...SOUTHEAST INDIANA...CENTRAL OHIO...MIAMI VALLEY OF
OHIO...SOUTH CENTRAL OHIO...SOUTHWEST OHIO AND WEST CENTRAL OHIO.

.DAY ONE...TODAY AND TONIGHT.

INCREASING HEAT AND HUMIDITY WILL LEAD TO HEAT INDEX VALUES IN
THE MID TO UPPER 90S THIS AFTERNOON.

SCATTERED THUNDERSTORMS WILL BE POSSIBLE LATE THIS AFTERNOON INTO
TONIGHT. A FEW OF THE STORMS MAY APPROACH SEVERE LIMITS WITH
DAMAGING WIND AND LARGE HAIL THE PRIMARY THREAT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

INZ073>075-080-KYZ089>100-OHZ077>079-081-088-080830-
RIPLEY-DEARBORN-OHIO-SWITZERLAND-CARROLL-GALLATIN-BOONE-KENTON-
CAMPBELL-OWEN-GRANT-PENDLETON-BRACKEN-ROBERTSON-MASON-LEWIS-HAMILTON-
CLERMONT-BROWN-ADAMS-SCIOTO-
426 AM EDT SUN AUG 7 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST INDIANA...NORTHEAST
KENTUCKY...NORTHERN KENTUCKY...SOUTH CENTRAL OHIO AND SOUTHWEST
OHIO.

.DAY ONE...TODAY AND TONIGHT.

THUNDERSTORMS WILL PUSH EAST ACROSS THE AREA THROUGH MID MORNING.
LOCALLY HEAVY RAINFALL WILL BE POSSIBLE WITH THESE STORMS.

INCREASING HEAT AND HUMIDITY WILL LEAD TO HEAT INDEX VALUES IN
THE UPPER 90S TO AROUND 100 DEGREES THIS AFTERNOON.

SCATTERED THUNDERSTORMS WILL BE POSSIBLE TONIGHT. A FEW OF THE
STORMS MAY APPROACH SEVERE LIMITS WITH DAMAGING WIND AND LARGE
HAIL THE PRIMARY THREAT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
410 AM EDT SUN AUG 7 2011

INZ073>075-080-KYZ089>098-OHZ077-071015-
RIPLEY-DEARBORN-OHIO-SWITZERLAND-CARROLL-GALLATIN-BOONE-KENTON-
CAMPBELL-OWEN-GRANT-PENDLETON-BRACKEN-ROBERTSON-HAMILTON-
INCLUDING THE CITIES OF...VERSAILLES...LAWRENCEBURG...
RISING SUN...VEVAY...CARROLLTON...WARSAW...BURLINGTON...
INDEPENDENCE...ALEXANDRIA...OWENTON...WILLIAMSTOWN...FALMOUTH...
BROOKSVILLE...MOUNT OLIVET...CINCINNATI
410 AM EDT SUN AUG 7 2011

...STRONG THUNDERSTORMS TO AFFECT THE AREA THROUGH 6AM...

A CLUSTER OF STRONG THUNDERSTORMS WILL MOVE EAST SOUTHEAST ACROSS
SOUTHEAST INDIANA...SOUTHWEST OHIO...AND NORTHERN KENTUCKY THROUGH
DAYBREAK. THESE STORMS ARE CAPABLE OF PRODUCING HEAVY
RAIN...LOCALIZED FLOODING...AND FREQUENT CLOUD TO GROUND
LIGHTNING. EXERCISE CAUTION WHEN TRAVELING OR HEADING OUTDOORS.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILMINGTON OH
528 AM EDT SUN AUG 7 2011

KYZ091>093-OHZ077-078-071000-
KENTON KY-BOONE KY-CAMPBELL KY-HAMILTON OH-CLERMONT OH-
528 AM EDT SUN AUG 7 2011

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN CLERMONT...
HAMILTON...EXTREME NORTHERN CAMPBELL...NORTHERN BOONE AND EXTREME
NORTHERN KENTON COUNTIES THROUGH 600 AM EDT...

AT 526 AM EDT...RADAR INDICATED A STRONG THUNDERSTORM NEAR BRIDGETOWN
NORTH...MOVING EAST AT 30 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM.

IN ADDITION...HEAVY RAIN CAN BE EXPECTED WITH THIS STORM.

SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...VILLA HILLS...NORTH
COLLEGE HILL...MOUNT HEALTHY...LUDLOW...PARK HILLS...FINNEYTOWN...
CINCINNATI...WYOMING...NEWPORT...BELLEVUE...SOUTHGATE AND DAYTON.

ALSO...WHITE OAK...MONFORT HEIGHTS SOUTH...NORTHGATE...GROESBECK...
WHITE OAK EAST...NORTHBROOK...MONFORT HEIGHTS EAST AND ST. BERNARD
ARE NEAR THE PATH OF THIS STRONG THUNDERSTORM.

WATER WILL POND ON ROADS AND MAY QUICKLY FILL ROADSIDE DITCHES AND
SMALL STREAMS.

RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT. IF THIS STORM BECOMES
STRONGER...THEN A WARNING MAY BE NEEDED.

LAT...LON 3925 8423 3904 8424 3906 8475 3927 8473