High pressure resided across the Mid Atlantic. Calm winds and clear conditions led to patchy dense fog across valley locations.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
High pressure resided across the Mid Atlantic. Calm winds and clear conditions led to patchy dense fog across valley locations. Dense fog formed in parts of the Northern Piedmont.
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 Aug 26, 8:41 PM EST, 4 hours 49 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 941 PM EDT TUE AUG 26 2014 .SYNOPSIS... HIGH PRESSURE WILL REMAIN OVER THE AREA THROUGH TONIGHT THEN WEAKEN WEDNESDAY AHEAD OF A COLD FRONT THAT WILL CROSS FROM THE NORTHWEST LATE WEDNESDAY. HIGH PRESSURE WILL CROSS THE NORTHERN MID-ATLANTIC THURSDAY NIGHT AND RESIDE OFFSHORE OVER THE WEEKEND. THE NEXT COLD FRONT WILL APPROACH THE MID-ATLANTIC EARLY NEXT WEEK. && .NEAR TERM /THROUGH WEDNESDAY/... TONIGHT...SIMILAR VALLEY FOG SETUP. MIN TEMPS GENERALLY A FEW DEGREES HIGHER THAN LAST WITH DEWPOINTS UP A BIT...LOW TO MID 50S WEST OF THE BLUE RIDGE AND LOW TO MID 60S EAST. WEDNESDAY...WEAKENING COLD FRONT (CURRENTLY CAUSING STRONG STORMS IN NRN IN/SRN MI) REACHES THE NORTHWEST ZONES LATE MORNING. MAX TEMPS LOW 90S AND DEWPOINTS IN THE LOW TO MID 60S ALLOW 1000 J/KG MLCAPE (ACCORDING TO 09Z SREF). SCATTERED THUNDERSTORMS THAT DIE AS THEY DOWNSLOPE AND GET STRUNG OUT FROM THE WEAKENING FRONT. I-95 WAS A GOOD DISCRIMINATOR FOR POP/NO POP AS OF NOW. SHOULD ORGANIZED ACTIVITY GET GOING THE BALT-WASH METRO COULD SEE SOME THUNDERSTORMS WEDNESDAY EVENING. DIURNAL TREND IN ACTIVITY WITH THE COLD FRONT ALSO DISSIPATING OVERNIGHT. FOG SHOULD FORM PARTICULARLY WHERE RAIN FALLS AS CLOUDS GENERALLY CLEAR BY LATE IN THE NIGHT. MIN TEMPS GENERALLY LOW TO MID 60S. && .SHORT TERM /THURSDAY THROUGH THURSDAY NIGHT/... THURSDAY...LIGHT NWLY FLOW AS SFC HIGH BUILDS IN FROM THE GREAT LAKES. MAX TEMPS MID TO UPR 80S WITH AMPLE SUNSHINE. OVERRUNNING MID/HIGH CLOUDS ENTER FROM THE WEST DURING THE AFTERNOON. NLY FLOW SHOULD LIMIT FOG THURSDAY NIGHT. MIN TEMPS MID 50S NW TO LOW 60S SE (MID 60S URBAN). && .LONG TERM /FRIDAY THROUGH TUESDAY/... HIGH PRESSURE OVER THE NORTHEAST WILL MIGRATE OFF THE COAST THROUGH THE DAY ON FRIDAY...CAUSING SURFACE WINDS TO BACK FROM EASTERLY TO SOUTHERLY AND SIGNALING THE RETURN OF WARMER AND MORE HUMID CONDITIONS FOR THE WEEKEND. HIGHS ON FRIDAY WILL BE IN THE LOWER TO MID 80S...INCREASING TO THE UPPER 80S TO LOWER 90S SATURDAY AND SUNDAY. UPPER LEVEL SUBTROPICAL HIGH PRESSURE OVER THE SOUTHEAST COAST SHOULD SUPPRESS ANY CONVECTION...KEEPING CONDITIONS DRY WITH ONLY FAIR WEATHER CUMULUS CLOUDS TO PROVIDE BREAKS FROM THE SUN FRIDAY AND SATURDAY. SUNDAY MAY SEE SOME THUNDERSTORMS IN THE EVENING AS THE UPPER LEVEL RIDGE WEAKENS AND MOVES SOUTH AND AN APPROACHING SHORTWAVE ASSISTS IN DESTABILIZING THE ATMOSPHERE. CONVECTION SHOULD REMAIN SCATTERED AND SEVERE CONVECTION IS NOT ANTICIPATED AT THIS POINT AS CAPE VALUES WILL MAX OUT AROUND 1000 J/KG. AN UPPER LEVEL SHORTWAVE TROUGH WILL DRAG SURFACE LOW PRESSURE ACROSS THE GREAT LAKES AND NORTHEASTWARD TOWARD NEW ENGLAND SUNDAY NIGHT AND MONDAY. THE ASSOCIATED COLD FRONT WILL BEGIN TO BRING RAIN TO THE AREA SUNDAY NIGHT. A SHORTWAVE/VORT MAX IS CURRENTLY PROGGED TO PASS NEAR THE NORTHWESTERN PORTION OF THE CWA...LEADING TO ENHANCED POPS IN THAT AREA SUNDAY NIGHT AND MONDAY MORNING . MONDAY SHOULD BE WET FOR MOST OF THE AREA AS THE FRONT MOVES OVER THE AREA AND STALLS. LOWEST POPS WILL BE FOUND ACROSS SOUTHERN MARYLAND...AS THE SURFACE BOUNDARY MAY STALL BEFORE IT REACHES THAT FAR SOUTHEAST. THE STALLED FRONT WILL CONTINUE TO BRING SHOWERS AND THUNDERSTORMS TO THE MID-ATLANTIC MONDAY NIGHT AND TUESDAY...AND ADDITIONAL PERIODS OF ENHANCE RAINFALL MAY OCCUR TUESDAY AS ANOTHER SHORT WAVE MAY CROSS THE FRONT. TEMPS FOR THE EARLY PART OF NEXT WORKWEEK SHOULD BE NEAR NORMAL...IN THE MID 80S. && .AVIATION /02Z WEDNESDAY THROUGH SUNDAY/... HIGH PRESSURE/VFR INTO WEDNESDAY OUTSIDE OF MORNING VALLEY FOG. WEAK COLD FRONT CROSSES LATE WEDNESDAY NIGHT WITH SCT TSRA WEST OF BALT-WASH CORRIDOR. VFR/HIGH PRESSURE RETURNS THURSDAY WITH LIGHT NWLY FLOW. CONFIDENCE IS LOW IN THE OCCURRENCE OF ANY HAZARDS TO AVIATION IN THE LONG TERM. && .MARINE... WEAK COLD FRONT CROSSES THE WATERS WEDNESDAY NIGHT. THUNDERSTORMS ARE EXPECTED TO DIE OUT BEFORE THE REACH THE WATERS AS OF THIS TIME. LIGHT NWLY FLOW THURSDAY AS HIGH PRESSURE BUILDS FROM THE GREAT LAKES. A SMALL CRAFT ADVISORY MAY BE NECESSARY SUNDAY IN BREEZY PREFRONTAL SOUTHERLY FLOW. && .TIDES/COASTAL FLOODING... WATER LEVELS WILL REMAIN ELEVATED. ANNAPOLIS WL NEED TO BE MONITORED FOR THE EARLY MRNG HIGH TIDE CYCLE. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE. && UPDATE...WOODY! PRVS...BAJ/CEB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 523 PM EDT TUE AUG 26 2014 ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 270930- 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- 523 PM EDT TUE AUG 26 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 NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504- WVZ050>053-055-501>506-270930- 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- 523 PM EDT TUE AUG 26 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 NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
The national radar mosaic for the moment the first event began.
1 dense fog. Local standard time, as filed.
Visibilities of a quarter mile or less was measured at Warrenton Airport and surrounding locations.
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, August 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: 540201.