A shortwave trough moved across the Mid Atlantic region. Hot and humid conditions led to an unstable environment which was conducive for severe thunderstorms.
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.
A shortwave trough moved across the Mid Atlantic region. Hot and humid conditions led to an unstable environment which was conducive for severe 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 16, 1:00 PM EST, 4 hours 54 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 200 PM EDT MON JUN 16 2014 .SYNOPSIS... HIGH PRESSURE WILL REMAIN TO OUR SOUTH AND EAST THROUGH WEDNESDAY ALLOWING FOR A RETURN FLOW TO USHER IN HOT AND HUMID CONDITIONS. A COLD FRONT WILL APPROACH THE REGION THURSDAY AND IT WILL STALL OUT NEARBY FOR FRIDAY THROUGH THE WEEKEND. && .NEAR TERM /THROUGH TONIGHT/... HIGH PRESSURE AND ITS ASSOCIATED UPPER-LEVEL RIDGE WILL CONTINUE TO MOVE OFF TO OUR EAST THIS AFTERNOON. A RETURN SOUTHERLY FLOW AROUND THE HIGH HAS CAUSED HOT AND HUMID CONDITIONS TO RETURN. MAX TEMPS WILL RANGE FROM NEAR 80 IN THE MOUNTAINS TO THE UPPER 80S AND LOWER 90S ACROSS MOST OTHER LOCATIONS. THE HEAT AND HUMIDITY HAS LED TO AN UNSTABLE ATMOSPHERE. A WEAK SHORTWAVE WILL PASS THROUGH THE REGION LATE THIS AFTERNOON AND EVENING WHILE A SURFACE TROUGH REMAINS OVERHEAD DURING THIS TIME. THE SHORTWAVE AND SURFACE TROUGH WILL HELP ERODE ANY CAPPING INVERSION IN PLACE...CAUSING SCATTERED SHOWERS AND THUNDERSTORMS TO DEVELOP LATE THIS AFTERNOON AND EVENING. DESPITE WEAK SHEAR PROFILES...THERE WILL BE PLENTY OF MID-LEVEL DRY AIR WHICH WILL ASSIST IN THE POTENTIAL FOR LOCALLY DAMAGING WIND GUSTS AND LARGE HAIL IN ANY THUNDERSTORMS THAT DO DEVELOP. DO FEEL THAT ANY SEVERE THUNDERSTORMS WILL BE LIMITED IN COVERAGE DUE TO THE WEAK SHEAR PROFILES. WILL MENTION THE LOCALIZED THREAT IN THE HWO FOR LATE THIS AFTERNOON AND EVENING. SUBSIDENCE BEHIND THE EXITING DISTURBANCE WILL LEAD TO CLEARING AND DRY CONDITIONS LATE TONIGHT. PATCHY FOG IS EXPECTED DUE TO HIGHER AMOUNTS OF LOW LEVEL MOISTURE. WARM AND HUMID CONDITIONS WILL PERSIST WITH MIN TEMPS RANGING FROM THE LOWER AND MIDDLE 60S IN THE POTOMAC HIGHLANDS TO THE LOWER AND MIDDLE 70S IN DOWNTOWN WASHINGTON AND BALTIMORE. && .SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/... HIGH PRESSURE WILL REMAIN CENTERED OVER THE SOUTHEASTERN CONUS INTO THE ATLANTIC OCEAN TUESDAY THROUGH WEDNESDAY NIGHT. A RETURN FLOW AROUND THE HIGH WILL CONTINUE TO USHER IN HOT AND HUMID CONDITIONS...THE HOTTEST AIRMASS OF THE SEASON SO FAR. FOR TUESDAY AND TUESDAY NIGHT...THE HOT AND HUMID CONDITIONS WILL LEAD TO A CHANCE FOR SHOWERS AND THUNDERSTORMS...BUT COVERAGE TUESDAY SHOULD BE LIMITED DUE TO A CAPPING INVERSION AND LITTLE IN THE WAY OF LIFTING MECHANISMS. THERE WILL BE A SURFACE TROUGH...BUT FORCING ALONG IT WILL BE WEAK. ANY THUNDERSTORMS THAT DO DEVELOP WILL BE MOST LIKELY DURING THE MID AFTERNOON HOURS THROUGH TUESDAY EVENING. MAX TEMPS WILL BE EVEN WARMER THAN TODAY...RANGING FROM THE LOWER AND MIDDLE 80S IN THE MOUNTAINS TO THE LOWER AND MIDDLE 90S ACROSS MOST OTHER LOCATIONS. MIN TEMPS TUESDAY NIGHT WILL BE IN THE UPPER 60S AND LOWER 70S ACROSS MOST AREAS...BUT EVEN WARMER IN THE CITIES OF WASHINGTON AND BALTIMORE WITH MIN TEMPS HOLDING IN THE MID AND UPPER 70S. FOR WEDNESDAY AND WEDNESDAY NIGHT...A NORTHWEST FLOW ALOFT WILL STRENGTHEN IN BETWEEN A RIDGE CENTERED OVER THE TENNESSEE VALLEY AND AN UPPER-LEVEL TROUGH BUILDING INTO NEW ENGLAND. THE COLD FRONT ASSOCIATED WITH THE TROUGH WILL ALSO BE MOVING INTO NEW ENGLAND...ALLOWING FOR THE PRESSURE GRADIENT TO STRENGTHEN BETWEEN THE BOUNDARY AND HIGH PRESSURE OVER THE SOUTHEASTERN CONUS. A DOWNSLOPING WESTERLY FLOW IS EXPECTED TO DEVELOP ACROSS OUR AREA IN BETWEEN THESE SYSTEMS...AND THIS WILL RESULT IN EVEN HOTTER CONDITIONS...MOST LIKELY THE HOTTEST OF THE STRETCH. MAX TEMPS WILL RANGE FROM THE 80S IN THE MOUNTAINS TO THE MID AND UPPER 90S ACROSS MOST LOCATIONS. WOULDNT BE SURPRISED TO SEE MAX TEMPS BREAK 100 IN A FEW SPOTS. THE COMBINATION OF THE HEAT AND THE HUMIDITY WILL CAUSE HEAT INDICES TO REACH OVER 100 DEGREES NEAR THE I-95 CORRIDOR. A HEAT ADVISORY MAY BE NEEDED FOR THIS AREA WEDNESDAY AFTERNOON INTO EARLY WEDNESDAY EVENING. TWEAKED POPS DOWN DURING THE DAY WEDNESDAY FOR THUNDERSTORMS...THINKING THAT THE DOWNSLOPING WESTERLY FLOW WILL CAUSE A CAPPING INVERSION AND ANY FORCING WILL BE WEAK. HOWEVER...MORE ORGANIZED CONVECTION IS EXPECTED TO OUR NORTH WEDNESDAY AFTERNOON AND THIS COULD DROP SOUTH INTO OUR CWA...CAUSING THE THREAT FOR THUNDERSTORMS WEDNESDAY EVENING INTO WEDNESDAY NIGHT. A FEW OF THOSE THUNDERSTORMS COULD BE SEVERE DUE TO HIGH AMOUNTS OF INSTABILITY. WARM AND HUMID CONDITIONS WILL CONTINUE WEDNESDAY NIGHT. && .LONG TERM /THURSDAY THROUGH MONDAY/... GFS 500MB HEIGHTS BEGINS TO FALL A LITTLE THURSDAY INTO FRIDAY. AREAS OF WEAK VORTICITY WILL CROSS THE CWA THURSDAY NIGHT THROUGH SATURDAY EVENING. VORTICITY SUNDAY AND MONDAY WILL GRAZE CWA BUT WILL PRIMARILY AFFECT PA. REGION OF STRONGER POSITIVE VORTICITY ADVECTION WILL CROSS THE CWA LATE MONDAY THROUGH TUESDAY MORNING. A FRONTAL BOUNDARY WILL SAG SOUTHWARD INTO THE CWA FOR THURSDAY AND STALL OUT OVER THE AREA THROUGH THE WEEKEND. CWA WILL STAY ON THE MOIST SIDE OF THE BOUNDARY THROUGH LATE SATURDAY. MOISTURE WILL RETURN ON SOUTHERLY WINDS AHEAD OF AN COLD FRONT APPROACHING FROM THE WEST. THE COLD FRONT WILL CROSS THE CWA FROM LATE MONDAY THROUGH TUESDAY AFTERNOON. DRAMATIC DRYING SEEMS POSSIBLE BEHIND THE FRONT. COMBINATION OF QUASISTATIONARY BOUNDARY AND PASSAGE OF COLD FRONT, WARM MOIST AIRMASS OVER CWA, AND PASSAGE OF SHORTWAVES WILL PROMOTE A PROLONGED PERIOD OF CHANCE POPS FOR SHOWERS AND THUNDERSTORMS. SHORTWAVES THAT MOVE THROUGH AT NIGHT COULD BRING CONVECTION AT NIGHT. THERE IS UNCERTAINTY WITH TIMING AND THIS WILL NEED TO BE RESOLVED AS WE GET CLOSER TO THESE FORECAST PERIODS. && .AVIATION /18Z MONDAY THROUGH SATURDAY/... SCATTERED THUNDERSTORMS ARE EXPECTED LATE THIS AFTERNOON AND EVENING. A FEW THUNDERSTORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS AND HAIL. THUNDERSTORM CHANCES WILL DECREASE OVERNIGHT...AND PATCHY BR MAY CAUSE MVFR VSBYS LATE TONIGHT INTO TUESDAY MORNING. VFR CONDITIONS ARE EXPECTED MOST OF THE TIME TUESDAY THROUGH WEDNESDAY. ANY THUNDERSTORM COVERAGE WILL BE LIMITED IN COVERAGE. THERE MAY BE A BETTER CHANCE FOR THUNDERSTORMS WEDNESDAY EVENING INTO WEDNESDAY NIGHT ACROSS THE NORTHERN TERMINALS. A COLD FRONT WILL STALL OUT NEAR THE TERMINALS THURSDAY THROUGH SATURDAY...BRINGING THE CHANCE FOR MORE SHOWERS AND THUNDERSTORMS. && .MARINE... HIGH PRESSURE WILL REMAIN TO THE SOUTH AND EAST OF THE WATERS THROUGH WEDNESDAY. WINDS SHOULD REMAIN BELOW SCA CRITERIA DURING THIS TIME. HOWEVER...SOUTHERLY WIND GUSTS MAY BE CLOSE TO SCA CRITERIA THIS EVENING. A FEW SHOWERS AND THUNDERSTORMS ARE EXPECTED THIS EVENING BEFORE DIMINISHING LATE TONIGHT. ANY SHOWERS AND THUNDERSTORMS TUESDAY AND WEDNESDAY WILL BE LIMITED IN COVERAGE. THERE IS A BETTER CHANCE FOR THUNDERSTORMS WEDNESDAY EVENING INTO WEDNESDAY NIGHT...ESPECIALLY ACROSS THE NORTHERN PORTIONS OF THE WATERS. ANY THUNDERSTORMS THAT DO DEVELOP MAY CONTAIN GUSTY WINDS AND HAIL. A COLD FRONT WILL STALL OUT NEAR THE TERMINALS THURSDAY THROUGH SATURDAY...BRINGING THE CHANCE FOR MORE SHOWERS AND THUNDERSTORMS. && .TIDES/COASTAL FLOODING... A LIGHT SOUTHERLY FLOW HAS CAUSED TIDAL ANOMALIES TO INCREASE TO AROUND ONE-HALF FOOT ABOVE NORMAL. THE NEXT HIGH TIDE THIS AFTERNOON AND EVENING WILL BE THE LOWER OF THE TWO...SO WATER LEVELS WILL REMAIN BELOW MINOR FLOODING THRESHOLDS. THE HIGH TIDE CYCLE TUESDAY MORNING WILL BE THE HIGHER OF THE TWO SO WATER LEVELS WILL COME CLOSE TO MINOR FLOODING THRESHOLDS FOR SENSITIVE AREAS. && .EQUIPMENT...THE NOAA WEATHER RADIO TRANSMITTER AT CHARLOTTESVILLE VIRGINIA HAS RETURNED TO SERVICE. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE. && SYNOPSIS...BJL NEAR TERM...BJL SHORT TERM...BJL LONG TERM...CEM AVIATION...BJL/CEM MARINE...BJL/CEM TIDES/COASTAL FLOODING...BJL EQUIPMENT...BJL
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 508 PM EDT MON JUN 16 2014 ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 170915- 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- 508 PM EDT MON JUN 16 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 SCATTERED THUNDERSTORMS ARE EXPECTED THIS EVENING. A FEW THUNDERSTORMS WILL BE CAPABLE OF PRODUCING LOCALLY DAMAGING WIND GUSTS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY MINOR TIDAL FLOODING IS POSSIBLE FOR SENSITIVE AREAS NEAR HIGH TIDE TUESDAY MORNING ALONG THE WESTERN SHORE OF THE MARYLAND CHESAPEAKE BAY AND THE SHORE OF THE UPPER TIDAL POTOMAC RIVER. THE COMBINATION OF HIGH HEAT AND HUMIDITY WILL CAUSE HEAT INDICES TO REACH OVER 100 DEGREES WEDNESDAY AFTERNOON INTO EARLY WEDNESDAY EVENING...ESPECIALLY NEAR THE INTERSTATE 95 CORRIDOR. SCATTERED THUNDERSTORMS ARE POSSIBLE WEDNESDAY EVENING INTO WEDNESDAY NIGHT. A FEW OF THE STORMS MAY PRODUCE DAMAGING WIND GUSTS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED WEDNESDAY EVENING INTO WEDNESDAY NIGHT. MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504- WVZ050>053-055-501>506-170915- 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- 508 PM EDT MON JUN 16 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 SCATTERED THUNDERSTORMS ARE EXPECTED THIS EVENING. A FEW THUNDERSTORMS WILL BE CAPABLE OF PRODUCING LOCALLY DAMAGING WIND GUSTS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SCATTERED THUNDERSTORMS ARE POSSIBLE WEDNESDAY EVENING INTO WEDNESDAY NIGHT. A FEW OF THE STORMS MAY PRODUCE DAMAGING WIND GUSTS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED WEDNESDAY EVENING INTO WEDNESDAY NIGHT.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
152 PM EDT MON JUN 16 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0612 PM TSTM WND DMG 6 NNE BRAKE 38.96N 78.98W
06/08/2014 HARDY WV NWS STORM SURVEY
NUMEROUS TREES SNAPPED AND UPROOTED. NWS STORM SURVEY
DETERMINED THE DAMAGE WAS CAUSED BY A WET MICROBURST
WITH ESTIMATED WINDS BETWEEN 80 AND 90 MPH.
&&
EVENT NUMBER LWX1400455
KCSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
607 PM EDT MON JUN 16 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0534 PM HAIL 1 SW HAGERSTOWN 39.63N 77.73W
06/16/2014 E0.75 INCH WASHINGTON MD PUBLIC
RELAYED BY LOCAL BROADCAST MEDIA.
&&
EVENT NUMBER LWX1400456
GMSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
615 PM EDT MON JUN 16 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0608 PM HAIL 3 SSW CAVETOWN 39.60N 77.61W
06/16/2014 E1.00 INCH WASHINGTON MD TRAINED SPOTTER
QUARTER SIZE HAIL REPORTED
&&
EVENT NUMBER LWX1400457
CBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
617 PM EDT MON JUN 16 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0556 PM HAIL 1 SSW BRIDGEPORT 39.62N 77.68W
06/16/2014 E0.75 INCH WASHINGTON MD PUBLIC
DIME SIZE HAIL REPORTED AT MERITUS HOSPITAL
&&
EVENT NUMBER LWX1400458
CBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
637 PM EDT MON JUN 16 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0623 PM HAIL 2 ENE MYERSVILLE 39.51N 77.54W
06/16/2014 E0.75 INCH FREDERICK MD TRAINED SPOTTER
DIME SIZE HAIL REPORTED
&&
EVENT NUMBER LWX1400459
CBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
641 PM EDT MON JUN 16 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0623 PM HAIL MYERSVILLE 39.50N 77.57W
06/16/2014 E0.75 INCH FREDERICK MD PUBLIC
AT BUSINESS ON MAIN ST.
&&
EVENT NUMBER LWX1400460
GMSThe Sterling radar (KLWX), 65 km away, was scanning. The volume nearest the first event began at 22:51 UTC.
4 thunderstorm wind. Local standard time, as filed.
There was a large tree down on Catlett Mountain Road onto a power transformer.
There was a tree down on Fodderstack Road near Flint Hill.
There was a tree down on Ben Venue Road near Flint Hill.
There were wires down.
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: 529515, 529516, 529518, 529519.