Low pressure tracked through the Ohio Valley and into the Great Lakes. The warm front associated with this system passed through our region during the first.
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 tracked through the Ohio Valley and into the Great Lakes. The warm front associated with this system passed through our region during the first. Plenty of moisture from the Gulf of Mexico and the Atlantic Ocean combined with strong forcing associated with the warm front, causing thunderstorms to develop. Moderate instability along with strong forcing caused some thunderstorms to become severe.
Wind speed and direction changed rapidly with height near the warm front. This caused rotating thunderstorms, and some of them were able to produce tornadoes.
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 20 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
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 205 PM EDT FRI JUN 1 2012 DCZ001-MDZ003>007-009>011-013-014-016>018-501-502-VAZ025>031- 036>040-042-050>057-501>504-WVZ050>053-055-501>506-020015- DISTRICT OF COLUMBIA-WASHINGTON-FREDERICK MD-CARROLL- NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE- PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT- EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-AUGUSTA- ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-NELSON- ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER- PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX- ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA- KING GEORGE-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- INCLUDING THE CITIES OF...WASHINGTON...HAGERSTOWN...FREDERICK... WESTMINSTER...GAITHERSBURG...COLUMBIA...BALTIMORE...ANNAPOLIS... WALDORF...ST MARYS CITY...FROSTBURG...CUMBERLAND...STAUNTON... WAYNESBORO...HARRISONBURG...WINCHESTER...FRONT ROYAL... CHARLOTTESVILLE...LEESBURG...CULPEPER...MANASSAS... MANASSAS PARK...FAIRFAX...ALEXANDRIA...FALLS CHURCH... FREDERICKSBURG...WARRENTON...HIGHTOWN...MONTEREY...MARTINSBURG... CHARLES TOWN...MOOREFIELD...BAYARD...MOUNT STORM...PETERSBURG... ELK GARDEN...KEYSER...FORT ASHBY...CIRCLEVILLE...FRANKLIN 205 PM EDT FRI JUN 1 2012 ...SEVERE WEATHER LIKELY THIS AFTERNOON AND EVENING FOR WASHINGTON DC/BALTIMORE METROPOLITAN AREAS AND SURROUNDING REGION... A SERIES OF STRONG-TO-SEVERE STORMS ARE LIKELY ACROSS THE WASHINGTON DC/BALTIMORE METROPOLITAN AREAS AND SURROUNDING REGION THIS AFTERNOON AND EVENING. THIS WILL BRING AN INCREASED THREAT OF DAMAGING WINDS...LARGE HAIL AND ISOLATED TORNADOES TO THE REGION IN TWO ROUNDS. THE FIRST ROUND OF ANTICIPATED SEVERE WEATHER HAS STARTED. SCATTERED STRONG-TO-SEVERE THUNDERSTORMS WILL CONTINUE TO DEVELOP EAST FROM THE BLUE RIDGE AND MOVE NORTH THROUGH THE WASHINGTON/BALTIMORE REGION THROUGH 6 PM. THREATS WITH THIS ACTIVITY ARE DAMAGING WIND GUSTS...LARGE HAIL...ISOLATED TORNADOES...AND VERY HEAVY RAIN. THE SECOND ROUND OF SEVERE WEATHER WILL CROSS THE REGION DURING THE EVENING FROM THE WEST AS A LINE OF THUNDERSTORMS DEVELOPS OVER CENTRAL WEST VIRGINIA AND SOUTHWEST VIRGINIA THIS AFTERNOON. THE LINE OF THUNDERSTORMS WILL STRENGTHEN WHILE MOVING EAST ACROSS THE THE INTERSTATE 81 CORRIDOR BETWEEN 5 PM AND 7 PM...THEN ACROSS THE INTESTATE 95 CORRIDOR BETWEEN 6 AND 8 PM...BEFORE FINALLY REACHING THE CHESAPEAKE BAY AROUND 9 PM. THE PRIMARY THREAT FROM THIS ROUND OF SEVERE WEATHER WILL BE DAMAGING WIND GUSTS AND ISOLATED TORNADOES. ALTHOUGH ALL OF THE REGION HAS THE POSSIBILITY OF EXPERIENCING TORNADOES TODAY...THE MOST LIKELY TIME WILL BE FROM 6 TO 9 PM IN AN AREA ALONG THE INTERSTATE 95 CORRIDOR FROM FREDERICKSBURG VIRGINIA NORTH TO BALTIMORE MD THEN EAST TO THE CHESAPEAKE BAY. THIS AREA INCLUDES THE MAJOR METROPOLITAN AREAS OF WASHINGTON DC AND BALTIMORE MARYLAND. WHILE THESE ARE THE BEST APPROXIMATIONS FOR TIMING AT THIS MOMENT...RESIDENTS...BUSINESSES...AND VISITORS ACROSS THE REGION SHOULD BE PREPARED FOR SEVERE WEATHER ANYTIME THIS AFTERNOON THROUGH MIDNIGHT TONIGHT...AND HAVE A SAFETY PLAN IN PLACE. KEEP IN MIND THAT EVEN THOUGH THE WEATHER MAY BE CALM AT TIMES DURING SEVERE THUNDERSTORM OR TORNADO WATCHES...CONDITIONS CAN DETERIORATE RAPIDLY AND BECOME LIFE THREATENING. A TORNADO WATCH IS IN EFFECT FOR THE REGION UNTIL 9 PM THIS EVENING. PLEASE MONITOR THE WEATHER AND TUNE INTO NOAA WEATHER RADIO...ALONG WITH YOUR FAVORITE RADIO...TELEVISION...OR INTERNET WEATHER INFORMATION SOURCE FOR UPDATED INFORMATION. LEE/JACKSON
The Sterling radar (KLWX), 28 km away, was scanning. The volume nearest the first event began at 18:07 UTC.
47 thunderstorm wind, 12 tornado, 1 hail. Local standard time, as filed.
A large limb was snapped near Mount Ephraim Road and MD-28.
A tornado uprooted nearly two dozen trees in a wooded area along western sections of Kings Valley Drive between Kingstead and Mountain View Road. The tornado produced roofing damage to a barn in the 11000 Block of Mountain View Road.
Damage was observed to about a dozen trees and a street sign on Mount Ebo Road. |A video recording made at the time showed the tornado touching down where the damage occurred.
The tornado produced sporadic damage near Twin Arch road. There were about two dozen trees uprooted along with large limbs snapped.
Intitial tornado damage occurred to trees along west Watersville Road just north of Old Frederick Road. The tornado tracked northeast across a large wooded area of West Watersville Road where a swath of large Hardwood trees were either snapped or uprooted.
An area of intense damage consistent with EF-1 level winds was noted in the 500 Block of West Watersville Road where 30 to 40 large Hardwood trees up to two feet in diameter were uprooted or snapped twenty feet up.
Several large tree limbs were blown down from thunderstorm winds.
The tornado caused tree damage along Pleasant View Lane. Some shingles were blown off house roofs and trees fell onto several homes and power lines. A house in the 23700 Block of Woodfield Road had minor damage to its eaves on the northeast-facing side.
The tornado caused tree damage and minor structure damage to one home along Echo Creek Court.
The tornado snapped and uprooted several trees along the 2600 Block of Bird View Road. The most concentrated damage was focused along and north off Green Mill Road where numerous hardwood trees were uprooted and snapped, with some tree trunk diameters in excess of two feet. A tree fell onto a house, leaving that residence uninhabitable.
The tornado tracked across MD State Route 140, after passing near the Finksburg Library, producing scattered tree damage.
A swath of mainly tree damage south of the tornado track appear to have been caused by winds from a rear flank downdraft.
Two trees were blown down near Coon Club Road at Academy Drive.
A tree that was knocked down along Indian Head Highway caused damage to a vehicle and minor roof damage to a house.
Trees were blown down along Penguin Pl. road.
Trees were blown down along Evergreen Dr.
Two trees were knocked down at Millers Station Road and Rohrbaugh Road.
The tornado topped a few trees in a neighborhood just north of Hammond Middle School and south of the 10500 Block of Gorman Road.
The tornado uprooted and topped trees at the end of Broad Cloth Way. The most intense damage was in the 7400 Block of Weather Worn Way near the intersection with Eden Brook Drive, where about two dozen mature hardwood trees were uprooted and snapped behind two homes. There was roof damage to a house after a large tree fell onto it, and another home across fro a Day Care Center on Eden Brook had its chimney blown over.
After passing north of Eden Brook Driver near First League, tornado damage was more intermittent, with several trees topped. One large limb fell on a house on Kindler Road at Single Wheel Path. The tornado lifted before crossing Route 32. An eyewitness on Route 32 near Interstate 95 approximately two miles away observed the tornado just before it lifted.
The report was taken during the NWS Storm Survey of the Scaggsville tornado.
Trees were knocked down near the intersection of Rustling Leaf and Snowden River Parkway.
Multiple trees were knocked down near the intersection of Broken Land Parkway and Cradlerock Way.
Trees were heavily damaged with limbs of 8 to 12 inches ripped off from strong thunderstorm winds.
Multiple trees were blown down near the intersection of Old Annapolis Rd. and Red Branch Rd.
A tree was blocking the roadway near the intersection of Route 1 and Rowanberry Dr.
A tree fell onto a house along Westchester Avenue.
Multiple trees were blown down across train tracks near the town of Cheverly.
Trees were blown down along Burleith Ave.
Trees were blown down by strong thunderstorm winds.
Trees were knocked down by strong thunderstorm winds along Druid Park Dr.
Trees were blown down by strong thunderstorm winds.
Large tree limbs were blown down along Cloverhill Rd.
A tree was knocked down along Poffenberger Road.
Trees were blown down along Halwyn Ave.
Trees were blown down by strong thunderstorm winds.
Trees were blown down along Deepdene Rd.
Large tree limbs were knocked down from strong thunderstorm winds.
Large tree limbs were blown down along Putney Way.
Trees were knocked down along Dartmouth Rd.
A large tree fell on a home along Chestnut Ave.
Trees were blown down along Interstate 83.
A short narrow damage path was encountered between Meadowhill Road and Forbes Boulevard, consisting of spotty tree damage. The debris field exhibited evidence of cyclonic curvature consistent with a weak EF-0 tornado.
Large trees were uprooted and snapped in the area of Fellowship Forest. Several of the trees fell onto houses.
A large tree was uprooted along Stevenson Lane.
There was damage from trees blown down by strong thunderstorm winds at the Pine Ridge Golf Course and the adjacent neighborhood.
A tree was blown down near the intersection of Baur Road and Smithfield Drive.
Damage consisted entirely of uprooted and snapped healthy trees along a brief and concentrated path that began near Lemon Bridge Road and Wildlife Loop South and ended near South Road and Wildlife South. In this portion of the forest, several trees were uprooted or snapped, with other adjacent trees exhibiting snapped limbs.
A tree was blown down along Maryland 147 between Glen Arm and Fort Rd.
Initial tree damage was noted in the Stoneybrook Community along Streamside Drive. The tornado crossed Mountain Road and then traveled along the many Strip Malls and Businesses along the Route 1-Belair Road Corridor in Pleasant Hills. Many downed trees and business signs were blown out. Roof and siding damage was also noted on several properties.
A dentist office in Bel Air lost a portion of its roof. Some signs and debris were carried a half mile along the tornado track.
The tornado reached its peak intensity along West Grove Avenue and Eutaw Place. The businesses in this area were severely damaged. Warehouses had their front doors and windows blown out and then had significant roof and wall damage as winds exited the structures. A light pickup truck was picked up by the wind and overturned. A small office and storage concrete block structure was unroofed and then had its walls blown in. The falling blocks fell on two men sheltering inside who were injured.
A nearby Wal-Mart parking lot had street sign and some tree damage. The tornado created chaotic tree damage along Harford Road just west of Connelly Road in a residential area before lifting.
Strong thunderstorm winds caused damage at the Fort Meade Commissary.
Trees were blown down along Moss Ave.
Trees were blown down along South Street at Franks Lane.
Trees were blown down at Robbins Terrace.
The tornado touched down near the intersection of Orleans Road NE and Turkey Farm Road NE. The track was nearly one mile long. The tornado snapped numerous trees and uprooted one large and several smaller trees. Electrified fencing had to be repaired and trees removed from Turkey Farm Road NE.
Damage encountered along the circulation path was primarily trees, consisting of uprooted and snapped trees and limbs.
Minor damage was noted to eaves and siding at an apartment complex along Disney Road, where tree damage was also found. Damage to trees was encountered along Carriage drive, Golden Pine Circle and Gesna Road, and to trees and house siding along Fairbanks Drive. A sun room on one house in this area suffered uplift of a portion of its roof, but uplift appears to be the result in large part of channeled wind.
A decaying tornado was observed by tower personnel and airport patrons crossing the western portion of a runway.
Trees were blown down by strong thunderstorm winds.
Trees were blown down by strong thunderstorm winds.
A tree was blown down in Hagerstown.
Trees were blown down along Chinquapin Parkway.
Large tree limbs were knocked down along Clipper Mill Rd.
Trees were blown down by strong thunderstorm winds.
An estimated 70 mph gust was reported from a strong thunderstorm.
A tree was blown down at the intersection of Green Valley Road and Limeplant Road.
Branches were knocked down from strong thunderstorm winds near the Happy Hounds Lodge.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2012Every state in 2012This day in weather historyThe tornado archive for Maryland, 2012Warnings in Maryland, 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: 393592, 391763, 391764, 391765, 391766, 393852, 391768, 391767, 393855, 393864, 393865, 393866, 393867, 393879, 391769, 393890, 393894, 393901, 393915, 393898, 393904, 393907, 393910, 393911, 393917, 393921, 393922, 393924, 393925, 393927, 393928, 393929, 393930, 393931, 393933, 393938, 393941, 391775, 393942, 393943, and more.