Low pressure both aloft and at the surface passed by to the west during the first. The warm front associated with the low moved through our region during this time.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LWX wrote it up.
Low pressure both aloft and at the surface passed by to the west during the first. The warm front associated with the low moved through our region during this time. Plenty of air from the Gulf of Mexico and Atlantic Ocean ushered in copious amounts of moisture while the lift associated with the warm front was strong.
Showers and thunderstorms were able to mix down strong winds from aloft. Moderate instability also caused large hail in a few thunderstorms.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Baltimore/Washington wrote its last area forecast discussion before the first event at Jun 1, 9:48 AM EST, 3 hours 14 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1048 AM EDT FRI JUN 1 2012 .SYNOPSIS... LOW PRESSURE OVER THE OHIO VALLEY WILL MOVE NORTHWARD INTO THE GREAT LAKES TODAY. THIS WILL CAUSE A COLD FRONT TO MOVE ACROSS THE AREA LATE THIS AFTERNOON AND EVENING. WEAK HIGH PRESSURE BUILDS IN ON SATURDAY. AN UPPER TROUGH WILL PERSIST OVER THE EASTERN STATES THIS WEEKEND INTO THE MIDDLE PART OF NEXT WEEK. && .NEAR TERM /THROUGH TONIGHT/... COMPLICATED SYNOPTIC PATTERN THIS MORNING. LOW PRESSURE CENTER CURRENTLY LOCATED OVER THE CENTRAL OHIO VALLEY...WITH A STRONG COLD FRONT STRETCHING SOUTHWARD TO THE LOWER MISSISSIPPI RIVER VALLEY. A PRE-FRONTAL TROUGH IS LOCATED ACROSS SOUTH CENTRAL VA. A WARM FRONT IS DRAPED ACROSS THE NE CWFA CLOSE TO THE MASON DIXON LINE. REGIONAL RADAR LOOP SHOWS SOME PRECIP ACROSS NE MD ASSOCIATED WITH THE WARM FRONT. ADDITIONAL PRECIP ACROSS THE SOUTHERN CWFA ASSOCIATED WITH THE PRE-FRONTAL TROUGH. WIDESPREAD AREA OF PRECIP ALONG AND AHEAD OF THE COLD FRONT FROM THE CENTRAL OHIO VALLEY INTO WESTERN PA AND CENTRAL W VA. SKIES ARE MOSTLY CLOUDY/CLOUDY ACROSS THE CWFA. HOWEVER...TEMPS CONTINUE TO RISE INTO THE MIDDLE 70S ACROSS MUCH OF THE AREA TO LOWER 80S ACROSS LOWER SOUTHERN MARYLAND. NO CHANGE TO THE CURRENT MAX TEMP FORECAST...BUT TEMPS COULD BE SLIGHTLY HIGHER WHERE BREAKS IN THE CLOUDS OCCUR. AREA OF CLEARING ACROSS NORTH CAROLINA/SOUTHERN VIRGINIA SHOULD CONTINUE TO SPREAD NORTHWARD...AND AREAS EAST OF THE BLUE RIDGE COULD GO PARTLY CLOUDY BY THE MID AFTERNOON...THUS INCREASING THE INSTABILITY. DO THINK MULTICELLULAR CLUSTERS WILL BE LIKELY ALONG THE PRE-FRONTAL SURFACE TROUGH THIS AFTERNOON...WITH A LINEAR STRUCTURE EXPECTED ALONG THE COLD FRONT LATER THIS EVENING. NICE INVERTED V MODIFIED SOUNDING SHOWS THE POTENTIAL FOR DAMAGING WIND GUSTS WITH ANY CONVECTION THAT DEVELOPS. ISOLATED TORNADOES WILL BE MORE LIKELY WITH THE QLCS LINE ALONG THE COLD FRONT THIS EVENING. QLCS FEATURES ARE CLIMATOLOGICALLY FAVORED EAST OF THE BLUE RIDGE...AND ONLY MINIMAL INSTABILITY IS NECESSARY. SO...STRONG/SEVERE THUNDERSTORMS WILL CONTINUE TO BE POSSIBLE EVEN WITH THE LOSS OF HEATING. THUNDERSTORMS ASSOCIATED WITH THE PRE-FRONTAL TROUGH ARE EXPECTED DURING THE MID AFTERNOON...AFTER 2 PM. THE LINE ALONG THE FRONTAL BOUNDARY SHOULD BEGIN IMPACTING THE WESTERN CWFA AROUND 5 TO 6 PM...CROSSING THE BLUE RIDGE AROUND 7 TO 8 PM...AND FINALLY EAST OF THE CWFA BETWEEN 10 AND MIDNIGHT. PWATS HAVE DOUBLED FROM LAST NIGHTS SOUNDING TO AROUND 1.5 INCHES. THUNDERSTORMS WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL. WITH ACTIVITY EXPECTED ALONG THE PRE-FRONTAL TROUGH AND THE COLD FRONT...FLASH FLOODING WILL BE POSSIBLE WHERE STORMS REPEATEDLY MOVE ACROSS. IN ADDITION...AREAS THAT HAVE RECEIVED HEAVY RAINFALL IN THE LAST WEEK OR SO...IE DC...PRINCE WILLIAM...WESTERN MARYLAND AND PORTIONS OF THE WEST VIRGINIA PANHANDLE WILL BE EVEN MORE SUSCEPTIBLE TO FLASH FLOODING. && .SHORT TERM /SATURDAY/... WEAK SURFACE HIGH PRESSURE BUILDS INTO THE MID ATLANTIC ON SATURDAY. NORTHWEST WINDS/COLD ADVECTION WILL BRING COOLER AND LESS HUMID CONDITIONS. MORNING MAY BEGIN WITH A DECENT AMOUNT OF SUNSHINE...BUT DESPITE DOWNSLOPING FLOW THE PRESENCE OF AN UPPER TROUGH MAY PROMOTE CUMULUS DEVELOPMENT FOR THE AFTERNOON FOR PARTLY SUNNY SKIES. && .LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/... THE NEXT SEVERAL DAYS OF NEAR AVERAGE TEMPERATURES AND RELATIVELY COMFORTABLE HUMIDITIES MAY JUST BE ENOUGH TO WASH OUT MEMORIES OF THE FEW DAYS OF HEAT...CENTERED AROUND THIS PAST WEEKEND. THE COMING WEEK WILL CERTAINLY BE MORE ACTIVE THAN DURING THE HOT-STRETCH. AFTER DEPICTING A GOOD CONSENSUS FOR THE NEXT COUPLE OF DAYS...MED AND LONG RANGE GUIDANCE TAKE DIFFERING SIDES ON WHAT TO DO W/ THE NEXT SYSTEM. FIRST...THE PARENT UPPER LEVEL SYSTEM ASSOCIATED W/ THE SYSTEM CURRENTLY APPROACHING THE AREA WILL PIVOT TO OUR NORTH AND SWING BACK TOWARD THE NEW ENGLAND COAST EARLY NEXT WEEK. THE OCCLUDING UPPER LOW THAT GETS STUCK OVER ONTARIO WILL TRANSFER THE REST OF ITS ENERGY TO A DEVELOPING SYSTEM OFF CAPE COD. THIS TRANSITION WILL ALLOW SOME BATCHES OF RAIN TO SWING BACK DOWN ACROSS THE MID ATLC SUN AND MON IN BRIEF SCATTERED POCKETS. THE NAM IS MORE AGGRESSIVE W/ THIS SOLUTION...WHILE THE GFS TENDS TO PULL THE FEATURE OFF THE COAST...PULLING UP JUST TO OUR NE INSTEAD OF PASSING OVER THE AREA. AN INTERESTING SECONDARY LOW PRESSURE SYSTEM DEVELOPS IN LATEST RUN OF THE GFS. THIS NEXT SYSTEM BEGINS AS A SERIES OF WEAK UPPER WAVES COMING DOWN FROM THE NRN PLAINS THAT COMBINE AND STRENGTH AS THEY MOVE SE FROM THE GREAT LAKES REGION. BY THE TIME THIS NEW FEATURE APPROACHES THE MID ATLC COAST...A RAPID INTENSIFICATION TAKES PLACE OVER-TOP OUR AREA FROM TUE INTO WED. THIS TYPE OF SOLUTION CREATES AN POTENT SYSTEM W/ DYNAMIC FORCING BUT ALSO ONE THAT COULD CHANGE DRAMATICALLY FROM RUN-TO-RUN OVER THE NEXT COUPLE OF DAYS. THE ECMWF...WHICH IS MORE IN-STEP W/ THE NAM TOWARD THE END OF ITS CYCLE...BASICALLY KEEPS OUR CURRENT LOW PRESSURE SYSTEM SITTING OFF THE NEW ENGLAND COAST AND ROTATING IN PLACE FOR THE ENTIRE WORK WEEK. WITH EITHER SOLUTION FOR OUR LONG RANGE FORECAST...THERE WILL BE A DISTINCT LACK OF AN UPPER RIDGE AND THEREFORE NO RETURNING OF THE HEAT/HUMIDITY - THRU THE CURRENT FORECAST PERIOD. && .AVIATION /15Z FRIDAY THROUGH TUESDAY/... MAIN AVIATION IMPACT WILL BE THUNDERSTORMS THIS AFTERNOON AND EVENING. WARM FRONT CONTINUES TO LIFT NORTH OF THE AREA THIS MORNING WITH A STRAY SHOWER OR TWO ACROSS NE MD. THEN PRE-FRONTAL TROUGH AND COLD FRONT WILL SERVE AS FOCUSING MECHANISMS FOR NUMEROUS SHOWERS/THUNDERSTORMS THIS AFTERNOON/EVENING...PERHAPS AS MULTICELLS THIS AFTERNOON AND THEN A SQUALL LINE THIS EVENING. GIVEN HIGHER CONFIDENCE OF OCCURRENCE...HAVE MODIFIED VCTS/CB TO PREVAILING TSRA DURING THE TIME OF THE GREAT PROBABILITY FOR IMPACT. ITS POSSIBLE THAT TSRA MAY NOT EXTEND FAR ENOUGH INTO THE EVENING AND WOULD NEED ADJUSTMENT. COLD FRONT LOOKS TO MOVE THROUGH THE HUBS 05Z-07Z WITH A WIND SHIFT TO THE NORTHWEST. WEAK HIGH PRESSURE BUILDS IN FOR SATURDAY. AFTER MOVING OFF FROM THE NEW ENGLAND COAST SAT INTO SUN...THE MAIN UPPER LOW WILL SWING DOWN SOME SHOWERS AND MID LEVEL CLOUDS BACK ACROSS THE MID ATLC FROM SRN CANADA. THIS ACTIVITY WILL BE LIGHT AND INTERMITTENT AT BEST...W/ SOME BREEZY NWLY WINDS AT THE SFC INTO EARLY NEXT WEEK. SOME UNCERTAINTY IN THE DEPICTION OF A SUBSEQUENT LOW PRESSURE SYSTEM INTO THE MIDDLE OF NEXT WEEK. && .MARINE... SMALL CRAFT ADVISORY REMAINS IN EFFECT FOR THIS AFTERNOON/TONIGHT. SOUTHEAST FLOW IS FORECAST TO INCREASE WITH GUSTS AOA 20 KT THIS AFTERNOON/EVENING AHEAD OF A COLD FRONT. COLD FRONT WILL ALSO BRING THUNDERSTORMS WHICH MAY PRODUCE STRONG GUSTY WINDS REQUIRING SPECIAL MARINE WARNINGS. COLD FRONT MOVES THROUGH SHORTLY AFTER 06Z TONIGHT...WITH A WIND SHIFT TO THE NORTHWEST. ITS POSSIBLE THAT NORTHWEST WINDS LATE TONIGHT/EARLY SATURDAY MAY BE CLOSE TO SCA CRITERIA AS WELL...HOWEVER CONFIDENCE IS LOW. LOW PRESSURE WILL REMAIN OFF THE COAST THRU MUCH OF NEXT WEEK...W/ PERIODIC SCA CONDITIONS EARLY IN THE WEEK. && .TIDES/COASTAL FLOODING... WATER LEVELS WERE RUNNING ABOUT 1/2 FT ABOVE NORMAL OVERNIGHT. WITH SOUTHEAST WINDS INCREASING...EXPECT ANOMALIES TO INCREASE THROUGHOUT THE DAY. HIGH TIDE CYCLE THIS AFTERNOON IS THE LOWER ONE...AND EVEN A 1 FT ANOMALY WOULD NOT PRODUCE MINOR TIDAL FLOODING AT ANNAPOLIS. HOWEVER...AN ANOMALY OF JUST 3/4 FT WOULD DURING THE SUBSEQUENT HIGH TIDE CYCLE TONIGHT. BY THAT TIME...COLD FRONTAL PASSAGE WILL HAVE TURNED WINDS TO THE NORTHWEST BUT AM UNCERTAIN IF WATER WILL BE ABLE TO BE PUSHED OUT BY THAT TIME. THEREFORE...MINOR TIDAL FLOODING IS POSSIBLE DURING HIGH TIDE TONIGHT ESPECIALLY AT SENSITIVE LOCATIONS SUCH AS ANNAPOLIS. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 6 AM EDT SATURDAY FOR ANZ530>543. && UPDATE...LISTEMAA
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 140 PM EDT FRI JUN 1 2012 ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 021000- CHESAPEAKE BAY NORTH OF POOLES ISLAND MD- CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD- CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD- CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD- CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA- TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD- TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD- TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA- PATAPSCO RIVER INCLUDING BALTIMORE HARBOR- CHESTER RIVER TO QUEENSTOWN MD-EASTERN BAY- CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER- PATUXENT RIVER TO BROOMES ISLAND MD- TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-DISTRICT OF COLUMBIA-NORTHERN BALTIMORE-HARFORD- SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS- CALVERT-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX- ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA- KING GEORGE- 140 PM EDT FRI JUN 1 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MARYLAND PORTION OF THE CHESAPEAKE BAY...TIDAL POTOMAC RIVER...AND ADJACENT COUNTIES IN CENTRAL MARYLAND AND NORTHERN VIRGINIA AS WELL AS THE DISTRICT OF COLUMBIA. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS WILL DEVELOP AHEAD OF A COLD FRONT THIS AFTERNOON INTO THE EVENING HOURS. IN ADDITION...A LINE OF THUNDERSTORMS WILL DEVELOP ALONG A STRONG COLD FRONT AND MOVE THROUGH THE METROPOLITAN AREAS BETWEEN 7 PM AND MIDNIGHT. THUNDERSTORMS WILL BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS...LARGE HAIL AND TORNADOES. HEAVY RAINFALL COULD ALSO LEAD TO FLASH FLOODING. A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE TIDAL POTOMAC RIVER AND MARYLAND CHESAPEAKE BAY THROUGH TONIGHT. MINOR TIDAL FLOODING IS POSSIBLE DURING HIGH TIDE TONIGHT ALONG THE WESTERN SHORE OF THE CHESAPEAKE BAY AND TIDAL POTOMAC RIVER...PARTICULARLY AT SENSITIVE LOCATIONS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SMALL CRAFT ADVISORY CONDITIONS ARE POSSIBLE OVER THE WATERS SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTERS HAVE BEEN ACTIVATED. PLEASE RELAY ALL SEVERE WEATHER REPORTS TO YOU LOCAL NATIONAL WEATHER SERVICE. MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504- WVZ050>053-055-501>506-021000- WASHINGTON-FREDERICK MD-CARROLL-MONTGOMERY-HOWARD- EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-AUGUSTA- ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-NELSON- ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER- NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN HIGHLAND- EASTERN HIGHLAND-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-HARDY- WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL- WESTERN PENDLETON-EASTERN PENDLETON- 140 PM EDT FRI JUN 1 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN WEST VIRGINIA... NORTHERN AND CENTRAL VIRGINIA...AND CENTRAL AND WESTERN MARYLAND WITH THE EXCEPTION OF GARRETT COUNTY. .DAY ONE...THIS AFTERNOON AND TONIGHT A LINE OF THUNDERSTORMS WILL CONTINUE TO DEVELOP ALONG A STRONG COLD FRONT AND MOVE ACROSS THE REGION THIS AFTERNOON AND EVENING. THUNDERSTORMS WILL BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS...LARGE HAIL AND TORNADOES. HEAVY RAINFALL COULD ALSO LEAD TO FLASH FLOODING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTERS HAVE BEEN ACTIVATED. PLEASE RELAY ALL SEVERE WEATHER REPORTS TO YOU LOCAL NATIONAL WEATHER SERVICE. HTS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1121 AM EDT FRI JUN 1 2012 VAZ037-038-050-011545- ORANGE VA-GREENE VA-ALBEMARLE VA- 1121 AM EDT FRI JUN 1 2012 ...STRONG THUNDERSTORM TO AFFECT ORANGE...GREENE AND ALBEMARLE COUNTIES... AT 1121 AM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER CHARLOTTESVILLE...MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE EARLYSVILLE...STONY POINT...ADVANCE MILLS...QUINQUE...RUCKERSVILLE...EHEART AND AMICUS. HEAVY RAIN WITH THIS STORM WILL REDUCE VISIBILITIES TO BELOW ONE MILE AND CAUSE PONDING OF WATER ON ROADWAYS. WIND GUSTS OF 40 MPH AND SMALL HAIL CAN ALSO BE EXPECTED WITH THIS STORM. && LAT...LON 3831 7848 3817 7824 3788 7850 3808 7863 TIME...MOT...LOC 1521Z 211DEG 28KT 3810 7850 BAJ
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 122 PM EDT FRI JUN 1 2012 VAZ030-031-042-501-011800- WARREN VA-CLARKE VA-NORTHERN FAUQUIER VA-LOUDOUN VA- 122 PM EDT FRI JUN 1 2012 ...STRONG THUNDERSTORM TO AFFECT WARREN...CLARKE...NORTHERN FAUQUIER AND LOUDOUN COUNTIES... AT 122 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 2 MILES SOUTHEAST OF BLUE MOUNTAIN...MOVING NORTHEAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE BLUEMONT. STORM INTENSITY IS INCREASING...AND SEVERE WEATHER MAY DEVELOP RAPIDLY. REMAIN ALERT...AND BE PREPARED TO TAKE ACTION IF WARNINGS ARE ISSUED. WIND GUSTS OF 40 TO 50 MPH CAN BE EXPECTED WITH THIS STORM. && HTS/KRAMAR LAT...LON 3918 7794 3907 7771 3890 7798 3895 7808 TIME...MOT...LOC 1722Z 215DEG 20KT 3896 7799
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 140 PM EDT FRI JUN 1 2012 VAZ042-052-501-502-011815- NORTHERN FAUQUIER VA-SOUTHERN FAUQUIER VA- PRINCE WILLIAM/MANASSAS/MANASSAS PARK VA-LOUDOUN VA- 140 PM EDT FRI JUN 1 2012 ...STRONG THUNDERSTORM TO AFFECT NORTHERN FAUQUIER...SOUTHERN FAUQUIER...PRINCE WILLIAM/MANASSAS/MANASSAS PARK AND LOUDOUN COUNTIES... AT 140 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 2 MILES SOUTHEAST OF BROAD RUN...MOVING NORTH AT 30 MPH. LOCATIONS IMPACTED INCLUDE ARCOLA...SOUTH RIDING...BRAMBLETON... BROADLANDS AND OATLANDS. STORM INTENSITY IS INCREASING...AND SEVERE WEATHER MAY DEVELOP RAPIDLY. REMAIN ALERT...AND BE PREPARED TO TAKE ACTION IF WARNINGS ARE ISSUED. WIND GUSTS IN EXCESS OF 50 MPH AND SMALL HAIL CAN BE EXPECTED WITH THIS STORM. WINDS THIS STRONG CAN BRING DOWN LARGE TREE BRANCHES. TAKE SHELTER UNTIL THE STORM HAS PASSED. && LAT...LON 3905 7768 3901 7741 3871 7765 3875 7780 TIME...MOT...LOC 1740Z 202DEG 28KT 3881 7768 KRAMAR
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
142 PM EDT FRI JUN 1 2012
VAZ056-011830-
SPOTSYLVANIA VA-
142 PM EDT FRI JUN 1 2012
...STRONG THUNDERSTORM TO AFFECT SPOTSYLVANIA COUNTY...
AT 142 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 9 MILES
SOUTH OF GLENORA...MOVING NORTHEAST AT 30 MPH.
LOCATIONS IMPACTED INCLUDE MASSAPONAX.
STORM INTENSITY IS INCREASING...AND SEVERE WEATHER MAY DEVELOP
RAPIDLY. REMAIN ALERT...AND BE PREPARED TO TAKE ACTION IF WARNINGS
ARE ISSUED.
WIND GUSTS IN EXCESS OF 50 MPH ARE EXPECTED WITH THIS STORM. WINDS
THIS STRONG CAN BRING DOWN LARGE TREE BRANCHES. TAKE SHELTER UNTIL
THE STORM HAS PASSED.
&&
LAT...LON 3802 7775 3803 7776 3804 7775 3805 7778
3808 7779 3808 7782 3810 7784 3835 7767
3823 7740 3807 7754 3799 7764
TIME...MOT...LOC 1742Z 210DEG 25KT 3798 7778
HTSSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 147 PM EDT FRI JUN 1 2012 MDZ004-009-VAZ042-011830- FREDERICK MD-MONTGOMERY MD-LOUDOUN VA- 147 PM EDT FRI JUN 1 2012 ...STRONG THUNDERSTORM TO AFFECT FREDERICK...MONTGOMERY AND LOUDOUN COUNTIES... AT 147 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER LANSDOWNE...MOVING NORTH AT 25 MPH. LOCATIONS IMPACTED INCLUDE POINT OF ROCKS AND BALLENGER CREEK. STORM INTENSITY IS INCREASING...AND SEVERE WEATHER MAY DEVELOP RAPIDLY. REMAIN ALERT...AND BE PREPARED TO TAKE ACTION IF WARNINGS ARE ISSUED. && LAT...LON 3942 7759 3937 7728 3906 7747 3906 7761 TIME...MOT...LOC 1747Z 192DEG 22KT 3910 7751 HTS
The Sterling radar (KLWX), 12 km away, was scanning. The volume nearest the first event began at 18:03 UTC.
18 thunderstorm wind, 4 hail. Local standard time, as filed.
There was damage to outbuildings and numerous trees down along Highway 15 between Braddock and Route 50 from strong thunderstorm winds.
The hail report was relayed from the NSSL Shave project.
The hail report was relayed from the NSSL Shave project.
Large tree limbs were blown down from thunderstorm winds.
Several large trees were uprooted from strong thunderstorm winds.
Trees were blown down at the intersection of Route 7 and River Creek Parkway.
Hail fell along Highway 29.
A tree was blown down at Allwood Ln. and Rio Rd.
Trees were blown down at the Poplar Heights Pool.
Small branches were knocked down from strong thunderstorm winds along with pea size hail.
Trees were blown down along Gilbert Station Rd.
A tree was blown down along Widewater Road.
Trees were knocked down in the town of McLean from strong thunderstorm winds.
A small tree blown down by strong thunderstorm winds was blocking a school bus along Vineyard Rd.
Damage to 6 to 12 homes off of Justin Court in Remington was reported from strong thunderstorm winds.
Several branches were knocked off of trees along Hillview Court.
Numerous branches that were about 3 inches in diameter and 10 feet wide were blown down along Ramblewood Trail.
Trees were blown down in the town of Burke.
Large trees were uprooted along Fawn Lake Parkway.
A tree was blown down along Dahlgren Rd near Chotink.
A tree was blown down along Highway 301 near Chestnut Hill.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Virginia in 2012Every state in 2012This day in weather historyWarnings in Virginia, June 2012
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 393578, 393597, 393598, 393601, 393607, 393608, 393842, 393853, 393856, 393857, 393858, 393859, 393860, 393862, 393863, 393874, 393918, 393919, 393939, 393940, 393952, 393966.