A weak cold front moved across the Mid Atlantic region while hot and humid conditions led to a unstable environment. Showers and thunderstorms formed in vicinity of the front in the afternoon and some thunderstorms led to damaging winds.
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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.
A weak cold front moved across the Mid Atlantic region while hot and humid conditions led to a unstable environment. Showers and thunderstorms formed in vicinity of the front in the afternoon and some thunderstorms led to damaging winds.
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 18, 8:50 PM EST, 1 hour 43 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 950 PM EDT WED JUN 18 2014 .SYNOPSIS... HIGH PRESSURE WILL REMAIN ACROSS THE SOUTHEASTERN STATES THROUGH TONIGHT. A WEAK COLD FRONT WILL MOVE INTO THE REGION FROM THE NORTHWEST ON THURSDAY AND WILL STALL JUST SOUTH OF THE AREA FRIDAY INTO THE WEEKEND. ANOTHER WEAK COLD FRONT APPROACHES THE REGION NEXT WEEK. && .NEAR TERM /THROUGH THURSDAY/... ...UPDATE TO MENTION A SEVERE THUNDERSTORM WATCH NUMBER 329 IN EFFECT UNTIL 5 AM FOR PORTIONS OF NORTHERN MARYLAND...EASTERN WEST VIRGINIA AND THE NORTHERN SHENANDOAH VALLEY OF VIRGINIA. PREVIOUS DISCUSSION FOLLOWS... A WEAK CAPPING INVERSION BETWEEN 5KFT AND 10KFT HAS KEPT CONVECTION LIMITED THIS EVENING. HOWEVER...A SURFACE TROUGH OVERHEAD WILL CONTINUE TO BRING THE THREAT FOR ISOLATED SHOWERS AND THUNDERSTORMS THIS EVENING. HIGH AMOUNTS OF INSTABILITY ABOVE THE INVERSION DOES POSE THE THREAT FOR LOCALLY STRONG TO SEVERE STORMS IN ANY CONVECTION THAT DOES DEVELOP. A MORE ORGANIZED AREA OF CONVECTION IS TRACKING INTO PENNSYLVANIA AND WEST VIRGINIA THIS EVENING. THIS ACTIVITY IS ASSOCIATED WITH AN UPPER-LEVEL DISTURBANCE THAT IS TRACKING WEST TO EAST AND IT IS LOCATED AHEAD OF A SURFACE COLD FRONT OVER UPSTATE NEW YORK. THE COLD FRONT WILL BEGIN TO DROP SOUTH TONIGHT BUT IT WILL REMAIN WELL TO OUR NORTH. THE UPPER- LEVEL DISTURBANCE SHOULD PASS BY TO OUR NORTH OVER PENNSYLVANIA LATE TONIGHT. THEREFORE...MOST OF THE SHOWERS AND THUNDERSTORMS ARE EXPECTED TO REMAIN TO OUR NORTH. HOWEVER...THESE STORMS HAVE DEVELOPED A STRONG COLD POOL AND MORE DEVELOPMENT SOUTH AND EAST OF THE COLD POOL IS EXPECTED OVERNIGHT DUE TO THE UNSTABLE AIRMASS OVERHEAD. THEREFORE...SHOWERS AND THUNDERSTORMS ARE POSSIBLE LATE TONIGHT...ESPECIALLY ACROSS THE NORTHERN AND WESTERN PORTIONS OF THE CWA. ANY THUNDERSTORMS THAT DO DEVELOP MAY CONTAIN GUSTY WINDS AND HAIL. WARM AND HUMID CONDITIONS WILL CONTINUE TONIGHT WITH MIN TEMPS RANGING FROM THE 60S IN THE MOUNTAINS TO THE MID 70S IN WASHINGTON AND BALTIMORE. THE COLD FRONT WILL DROP SOUTH TOWARD NORTHERN MARYLAND THURSDAY WHILE ANOTHER UPPER-LEVEL DISTURBANCE TRACKS FARTHER SOUTH THROUGH OUR AREA. A WARM AND HUMID AIRMASS WILL LEAD TO MORE INSTABILITY...CAUSING SHOWERS AND THUNDERSTORMS TO DEVELOP. SHOWER AND THUNDERSTORMS COVERAGE WILL BE MORE EXTENSIVE THAN RECENT DAYS. TEMPS A FEW LESS DEGREES THURSDAY WITH 18C 850MB TEMPS COMPARED TO 20C TODAY. FURTHERMORE...SHOULD PRECIP BE GOING ON DURING THE DAY...OR CLOUD COVER THICK ENOUGH...MAX TEMPERATURES COULD BE SEVERAL DEGREES LESS (PERHAPS UPR 80S). && .SHORT TERM /THURSDAY NIGHT/... COLD FRONT/BOUNDARY STALLS SOUTH OF THE AREA THURSDAY NIGHT THROUGH FRIDAY WITH A QUIET PERIOD IN AN OTHERWISE ACTIVE SPELL. BRIEF COOL DOWN THAT CONTINUES INTO THE WEEKEND (AS LONG AS THE BOUNDARY STAYS SOUTH). WILL NEED TO LOOK OUT FOR SHORTWAVES RIDING THE BOUNDARY...SUCH AS THE 12Z ECMWF SOLUTION WITH A FRIDAY NIGHT/SATURDAY MORNING WAVE CROSSING THE AREA. && .LONG TERM /FRIDAY THROUGH WEDNESDAY/... COMBINED MOIST WARM AIRMASS ALONG WITH A QUASI-STATIONARY BOUNDARY AND WEAK PVA CONTINUES TO SUPPORT A CHANCE OF SHOWERS AND AFTERNOON THUNDERSTORMS THROUGH THE PERIOD. SURFACE LOW PRESSURE CENTER TRACKING EAST ALONG THE BOUNDARY WILL SUPPORT THE ENHANCED DEVELOPMENT OF SHOWERS AND THUNDERSTORMS WEDNESDAY. && .AVIATION /02Z THURSDAY THROUGH MONDAY/... VFR CONDITIONS ARE EXPECTED THROUGH THIS EVENING. AN ISOLATED THUNDERSTORM CANNOT BE RULED OUT...BUT COVERAGE WILL BE LIMITED. ORGANIZED THUNDERSTORM COMPLEX COULD APPROACH THE TERMINALS LATE TONIGHT INTO EARLY THURSDAY MORNING. MORE SHOWERS AND THUNDERSTORMS ARE EXPECTED AHEAD OF A COLD FRONT THURSDAY AFTERNOON. THE FRONTAL BOUNDARY DROPS SOUTH OF THE TERMINALS THURSDAY NIGHT AND FRIDAY BEFORE DRIFTING NORTH THIS WEEKEND. && .MARINE... ORGANIZED THUNDERSTORM SYSTEM COMPLEX POSSIBLY REACHES THE WATERS LATE TONIGHT INTO THURSDAY MORNING. MORE SHOWERS AND THUNDERSTORMS ARE LIKELY THURSDAY AFTERNOON. A FRONTAL BOUNDARY DROPS SOUTH OF THE WATERS THURSDAY NIGHT INTO THE WEEKEND. NO SCA IN THE OUTLOOK PERIOD. && .CLIMATE... A RECORD HIGH TEMPERATURE WAS REPORTED AT REAGAN NATIONAL AIRPORT YESTERDAY. THE HIGH WAS 97 DEGREES AND THIS SURPASSES THE OLD RECORD OF 95 DEGREES SET IN 1991...1957...AND 1945. RECORD HIGH TEMPERATURES WERE CHALLENGED THIS AFTERNOON...BUT SO FAR NONE HAVE BEEN TIED OR BROKEN. THE LIST BELOW SHOWS THE RECORD HIGHS ALONG WITH THE HIGH TEMPERATURES SO FAR TODAY. KBWI: RECORD HIGH: 97 IN 1957. HIGH TODAY: 96 KDCA: RECORD HIGH: 97 IN 1944. HIGH TODAY: 95 KIAD: RECORD HIGH: 94 IN 2007. HIGH TODAY: 91 && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE. && SYNOPSIS...BAJ NEAR TERM...BAJ/BJL SHORT TERM...BAJ LONG TERM...CEM AVIATION...BAJ/BJL MARINE...BAJ/BJL CLIMATE...BJL
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1131 PM EDT WED JUN 18 2014 ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 191000- 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- 1131 PM EDT WED JUN 18 2014 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...TONIGHT A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF NORTHERN MARYLAND...EASTERN WEST VIRGINIA AND THE NORTHERN SHENANDOAH VALLEY OF VIRGINIA UNTIL 5 AM. THUNDERSTORMS ARE EXPECTED TONIGHT AND SOME STORMS MAY BE SEVERE WITH DAMAGING WIND GUSTS...PARTICULARLY IN AND NEAR THE WATCH AREA. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THUNDERSTORMS ARE LIKELY THURSDAY. A FEW THUNDERSTORMS WILL BE CAPABLE OF PRODUCING LOCALLY DAMAGING WIND GUSTS AND LARGE HAIL...ESPECIALLY IN THE AFTERNOON AND EVENING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATE TONIGHT AND THURSDAY. MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504- WVZ050>053-055-501>506-191000- 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- 1131 PM EDT WED JUN 18 2014 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...TONIGHT A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF NORTHERN MARYLAND...EASTERN WEST VIRGINIA AND THE NORTHERN SHENANDOAH VALLEY OF VIRGINIA UNTIL 5 AM. THUNDERSTORMS ARE EXPECTED TONIGHT AND SOME STORMS MAY BE SEVERE WITH DAMAGING WIND GUSTS...PARTICULARLY IN AND NEAR THE WATCH AREA. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THUNDERSTORMS ARE LIKELY THURSDAY. A FEW THUNDERSTORMS WILL BE CAPABLE OF PRODUCING LOCALLY DAMAGING WIND GUSTS AND LARGE HAIL...ESPECIALLY IN THE AFTERNOON AND EVENING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS IN EFFECT TONIGHT AND IT MAY BE NEEDED THURSDAY.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1056 PM EDT WED JUN 18 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1052 PM TSTM WND DMG 1 ESE OELLA 39.27N 76.77W
06/18/2014 BALTIMORE MD TRAINED SPOTTER
LOTS OF TREE DEBRIS - SOME BRANCHES AS BIG AS 1.5
INCHES IN DIAMETER
&&
EVENT NUMBER LWX1400471
AEBThe Sterling radar (KLWX), 27 km away, was scanning. The volume nearest the first event began at 03:33 UTC.
9 thunderstorm wind. Local standard time, as filed.
There were trees down and some on one house.
There were 18 inch to two feet in diameter trees twisted and blown down.
There was a large tree on a house near Prince William County Fairgrounds.
There were several trees down.
There were many trees down along Bed Rock Drive.
There were several five to six inch in diameter branches down from the top of trees.
There was a tree down blocking both directions of GW Parkway between Belle View Blvd and Morningside Lane.
There were numerous trees down and power out in the Belle View neighborhood. Two trees struck homes.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Virginia in 2014Every state in 2014This day in weather historyWarnings in Virginia, June 2014
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: 529555, 529556, 529558, 529559, 529560, 529561, 529562, 529563, 529564.