Nelson County, Virginia
Scroll For Specific Counties Included
CANCELED * CANCELED * CANCELED * CANCELED
URGENT – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 592
NWS STORM PREDICTION CENTER NORMAN OK
1030 AM EDT FRI JUL 17 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
EASTERN MARYLAND
NORTH CENTRAL NORTH CAROLINA
CENTRAL AND PARTS OF EASTERN VIRGINIA
FAR EASTERN WEST VIRGINIA
COASTAL WATERS
EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 1030 AM UNTIL
500 PM EDT.
HAIL TO 1.5 INCHES IN DIAMETER…THUNDERSTORM WIND GUSTS TO 70
MPH…AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH
NORTHWEST OF BALTIMORE MARYLAND TO 35 MILES EAST SOUTHEAST OF
GREENSBORO NORTH CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH
SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
REMEMBER…A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
DISCUSSION…TSTMS DEVELOPING OVER THE BLUE RIDGE SHOULD INCREASE IN
COVERAGE AND INTENSITY TODAY WHILE PROGRESSING EWD INTO THE PIEDMONT
AND EVENTUALLY COASTAL PLAINS. INFLOW AIR MASS IS MOIST…AND WHEN
COUPLED WITH MODEST DIABATIC HEATING AND STEEP MIDLEVEL LAPSE
RATES…ENVIRONMENT WILL BECOME MODERATELY UNSTABLE BY AFTERNOON
WITH MLCAPE OF AT LEAST 1000-1500 J/KG. REGIONAL VWPS INDICATE A
NOTABLE INCREASE IN MID/HIGH-LEVEL FLOW IN CONJUNCTION WITH SHORT
WAVE TROUGH CURRENTLY MOVING THROUGH THE CUMBERLAND PLATEAU. THIS
STRENGTHENING VERTICAL SHEAR IN CONCERT WITH THE MODERATE
INSTABILITY SHOULD FOSTER ORGANIZED LINE SEGMENTS AND PERHAPS
SUPERCELL STRUCTURES WITH THE PRIMARY SEVERE THREATS BEING DAMAGING
WINDS AND HAIL.
County Outline Area
SEVERE THUNDERSTORM WATCH 592 IS IN EFFECT UNTIL 500 PM EDT
FOR THE FOLLOWING LOCATIONS
VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE AMELIA AMHERST
APPOMATTOX ARLINGTON AUGUSTA
BRUNSWICK BUCKINGHAM CAMPBELL
CAROLINE CHARLES CITY CHARLOTTE
CHESTERFIELD CLARKE CULPEPER
CUMBERLAND DINWIDDIE ESSEX
FAIRFAX FAUQUIER FLUVANNA
GOOCHLAND GREENE GREENSVILLE
HALIFAX HANOVER HENRICO
HENRY KING AND QUEEN KING GEORGE
KING WILLIAM LOUDOUN LOUISA
LUNENBURG MADISON MECKLENBURG
NELSON NEW KENT NOTTOWAY
ORANGE PAGE PITTSYLVANIA
POWHATAN PRINCE EDWARD PRINCE GEORGE
PRINCE WILLIAM RAPPAHANNOCK RICHMOND
ROCKINGHAM SPOTSYLVANIA STAFFORD
SUSSEX WARREN WESTMORELAND
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA CHARLOTTESVILLE COLONIAL HEIGHTS
DANVILLE EMPORIA FAIRFAX
FALLS CHURCH FREDERICKSBURG HARRISONBURG
HOPEWELL LYNCHBURG MANASSAS
MANASSAS PARK MARTINSVILLE PETERSBURG
RICHMOND STAUNTON WAYNESBORO
