Thunderstorm Wind, Washington
- When
- June 15, 3:35 PM EST
- Where
- Washington County, Hagerstown
- Measured
- 60 kt (69 mph) estimated gust
- Property damage
- $2,000
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 39.650, -77.717
Trees down.
Flash Flood and Damaging Winds in Maryland, June 15, 2004
3 thunderstorm wind, 1 flash flood, as filed by the National Weather Service.
Where it happened
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.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $8,000
- Crop damage
- None recorded
- Events
- 4
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.
What forecasters said that day
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 15, 1:09 PM EST, 2 hours 26 minutes earlier.
Area forecast discussion, Jun 15, 1:09 PM EST, 2 hours 26 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC ISSUED BY NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 209 PM EDT TUE JUN 15 2004 .SHORT TERM...TNGT AND TMRW... WK BOUNDARY WL BE THE MAIN WX PLAYER THIS AFTN THIS EVE. AMS HAS BECOME MODERATELY UNSTABLE OVR THE CWFA THIS AFTN. OBJ ANAL SHOWS SBCAPES IN EXCESS OF 3K J/KG OVR THE WRN 2/3 OF THE CWFA. MIXED LYR CAPE AROUND 1.5K J/KG LACK OF SFC FORCING WL KEEP COVERAGE UNDER CONTROL DESPITE VRY HIGH GUIDANCE POPS. CONVECTION STARTING TO FIRE ATTM ALG THE FAVORED TERRAIN AREAS IN THE POTOMAC HIGHALNDS AND BLUE RIDGE. WOULD XPCT CONVECTION TO CONT TO TAKE ROOT AND STRENGTHEN AS THE AFTN WEARS ON. TODAY LOOKS A SIMILAR TO YESTERDAY WITH MODERATE TO STG INSTAB BUT WEAKER SHEAR. HIGH PWATS SAY THAT HVY RAFL WL BE A PROB WITH STORMS TODAY SO WL INCLUDE APPROPRIATE WORDING. ANY HIGH WATER PROBS WL BE TOO ISOLD TO WARRANT A WATCH ISSUANCE. WL CONT WITH CHC POPS FOR TNGT TAPERING OFF TWD MORN. SUMMERLIKE TEMPS OVNGT AND TMRW WITH ABUNDANT LLVL MOISTURE. FORCING WL BE EVEN LESS TMRW SAVE FOR ANY RESIDUAL OUTFLOW BOUNDARIES. HOWEVER...WITH SUFFICIENT INSTABILITY LOW CHC POPS STILL WARRANTED. && .LONG TERM...THU AND BEYOND... CHGS IN THE OFFING IN THE MED RANGE. RIDGING IN THE EAST AND A DECENT CUTOFF OVR TX TODAY. MAIN BAND OF WESTERLIES WELL N OF THE CWFA. UPR LOW EVENTUALLY SHEARS OUT ALLOWING WEAK IMPULSES TO EJECT NE INTO THE MID ATL. GIVEN THE NEAR TROPICAL AMS IN PLACE FOR MUCH OF THE REMAINDER OF THE WK ONLY WK FORCING WL LEAD TO WDLY SCT TO SCT CONVECTION IN THE AFTN. SHORTWV ENERGY DIVING S FM CANADA WL HELP TO PUSH A BOUNDARY THRU DURING THE WKND BRINGING SOME DRIER AIR INTO THE REGION. WITH THE ABUNDANT MOISTURE...ISOLD HVY RAFL WL CONT TO BE A PROB UNTIL FROPA OVR THE WKND. VRY WARM TEMPS OVR THE NEXT FEW DAYS MAY IN TURN LEAD TO TEMPS APCHG HEAT ADV CRITERIA BUT ATTM LOOKS LIKE HEAT INDICES WL REMAIN BLO THE CENTURY MARK FOR THE NEXT COUPLE DAYS. LTR SHIFTS WL HV TO REEVALUATE HEAT POTENTIAL. OTRW...PREV FCST IN EXCELLENT SHAPE AND HV MADE ONLY MINOR CHGS ATTM. && .AVIATION...SC CLDS THRU MIDDAY OVR CNTRL PTNS OF THE PHL CWA... INCLUDING MOST OF THE TAF SITES...HAVE ERODED AND RAISED, AND SHUD CONT TO DO SO THRU THE MID AFTN PD. CUD BE SOME MVFR VSBYS IN HAZE THIS AFTN. HOWEVER, WL HAVE TO WATCH FOR RW/TRW TO FORM TWD LATE AFTN/EVE AS THEY ARE ALREADY RAPDILY DVLPG IN THE MOIST AND UNSTABLE AMS JUST TO THE SW...AND WE SHUD FOLLOW SUIT IN THE WAKE OF THE SC EROSIION. AS A RESULT WL INCLUDE A TEMPO GROUP FOR EVE TRW. IN ADDITION, ENERGY FM THE MORE ATTENTION-GETTING CONVTN WELL W SHUD ARRIVE TWD/AFT MIDN SO WL KEEP IN A CHC THRU THE OVRNGT PD... PSBLY ACTING AS A REPEAT OF LAST NITE. COPIOUS LO LVL MSTR COMBINED WITH PSBL LCLY EXCESSIVE PCPN IS LIKELY TO LEAD TO MORE MVFR SC/FOG OVRNGT AND ERY WED MRNG...BFR ERODING AND RAISING LATER WED MRNG. WENT A BIT MORE OPTIMISTIC OVR THE 2 FAR NRN LWX TAF SITES...WHICH WE ARE TENDING IN BACKUP MODE. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE. && PUBLIC...MANNING
Hazardous weather outlook, Jun 15, 10:15 AM EST, 5 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC ISSUED BY NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1115 AM EDT TUE JUN 15 2004 DCZ001-MDZ002>007-009>011-013-014-016>018-VAZ021-025>031-036>042- 050>057-WVZ048>055-161100- ALBEMARLE VA-ALLEGANY MD-ANNE ARUNDEL MD- ARLINGTON/FALLS CHURCH/ALEXANDRIA VA-AUGUSTA VA-BERKELEY WV- CALVERT MD-CARROLL MD-CHARLES MD-CLARKE VA-CULPEPER VA- DISTRICT OF COLUMBIA DC-FAIRFAX VA-FAUQUIER VA-FREDERICK VA- FREDERICK MD-GRANT WV-GREENE VA-HAMPSHIRE WV-HARDY WV-HARFORD MD- HIGHLAND VA-HOWARD MD-JEFFERSON WV-KING GEORGE VA-LOUDOUN VA- MADISON VA-MINERAL WV-MONTGOMERY MD-MORGAN WV-NELSON VA- NORTHERN BALTIMORE MD-ORANGE VA-PAGE VA-PENDLETON WV- PRINCE GEORGES MD-PRINCE WILLIAM/MANASSAS/MANASSAS PARK VA- RAPPAHANNOCK VA-ROCKINGHAM VA-SHENANDOAH VA-SOUTHERN BALTIMORE MD- SPOTSYLVANIA VA-ST. MARYS MD-STAFFORD VA-WARREN VA-WASHINGTON MD- 1115 AM EDT TUE JUN 15 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MARYLAND WEST OF THE CHESAPEAKE BAY AND EAST OF GARRETT COUNTY...EASTERN WEST VIRGINIA...NORTHERN AND CENTRAL VIRGINIA AND WASHINGTON DC. .DAY ONE...TODAY... A WEAK BOUNDARY MOVING SOUTH ACROSS THE AREA WILL PRODUCE SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EARLY THIS EVENING. THE AIRMASS AHEAD OF THIS BOUNDARY IS FORECAST TO BECOME VERY UNSTABLE THIS AFTERNOON. WHILE WIDESPREAD SEVERE IS NOT EXPECTED...ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EARLY THIS EVENING. THE MOST LIKELY RISK FROM ANY SEVERE THUNDERSTORMS THIS AFTERNOON WILL BE DAMAGING WINDS IN EXCESS OF 60 MPH. ANY THUNDERSTORMS THIS AFTERNOON WILL PRODUCE TORRENTIAL DOWNPOURS...AND DANGEROUS CLOUD TO GROUND LIGHTNING. THE AREAS MOST LIKELY TO SEE SEVERE WEATHER ARE ALONG AND NORTH OF A LINE FROM WINCHESTER TO WASHINGTON DC BETWEEN 3 PM AND 8 PM. .DAYS TWO THROUGH SEVEN... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND THIS EVENING. MANNING
In the hours before
Special weather statement, Jun 15, 10:15 AM EST, 5 hours 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC ISSUED BY NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1115 AM EDT TUE JUN 15 2004 DCZ001-MDZ002>007-009>011-013-014-016>018-VAZ021-025>031-036>042- 050>057-WVZ048>055-151600- ALBEMARLE VA-ALLEGANY MD-ANNE ARUNDEL MD- ARLINGTON/FALLS CHURCH/ALEXANDRIA VA-AUGUSTA VA-BERKELEY WV- CALVERT MD-CARROLL MD-CHARLES MD-CLARKE VA-CULPEPER VA- DISTRICT OF COLUMBIA DC-FAIRFAX VA-FAUQUIER VA-FREDERICK VA- FREDERICK MD-GRANT WV-GREENE VA-HAMPSHIRE WV-HARDY WV-HARFORD MD- HIGHLAND VA-HOWARD MD-JEFFERSON WV-KING GEORGE VA-LOUDOUN VA- MADISON VA-MINERAL WV-MONTGOMERY MD-MORGAN WV-NELSON VA- NORTHERN BALTIMORE MD-ORANGE VA-PAGE VA-PENDLETON WV- PRINCE GEORGES MD-PRINCE WILLIAM/MANASSAS/MANASSAS PARK VA- RAPPAHANNOCK VA-ROCKINGHAM VA-SHENANDOAH VA-SOUTHERN BALTIMORE MD- SPOTSYLVANIA VA-ST. MARYS MD-STAFFORD VA-WARREN VA-WASHINGTON MD- 1115 AM EDT TUE JUN 15 2004 ...SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EARLY EVENING... A WEAK BOUNDARY MOVING SOUTH ACROSS THE AREA WILL PRODUCE SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EARLY THIS EVENING. THE AIRMASS AHEAD OF THIS BOUNDARY IS FORECAST TO BECOME VERY UNSTABLE THIS AFTERNOON. WHILE WIDESPREAD SEVERE IS NOT EXPECTED...ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EARLY THIS EVENING. THE MOST LIKELY RISK FROM ANY SEVERE THUNDERSTORMS THIS AFTERNOON WILL BE DAMAGING WINDS IN EXCESS OF 60 MPH. ANY THUNDERSTORMS THIS AFTERNOON WILL PRODUCE TORRENTIAL DOWNPOURS...AND DANGEROUS CLOUD TO GROUND LIGHTNING. THE AREAS MOST LIKELY TO SEE SEVERE WEATHER ARE ALONG AND NORTH OF A LINE FROM WINCHESTER TO WASHINGTON DC BETWEEN 3 PM AND 8 PM. THOSE PLANNING OUTDOOR ACTIVITIES THIS AFTERNOON SHOULD REMAIN ALERT AND BE PREPARED TO SEEK SAFE SHELTER IF THREATENING WEATHER APPROACHES. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR THE LATEST INFORMATION. MANNING
Special weather statement, Jun 15, 10:15 AM EST, 5 hours 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC ISSUED BY NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1115 AM EDT TUE JUN 15 2004 DCZ001-MDZ002>007-009>011-013-014-016>018-VAZ021-025>031-036>042- 050>057-WVZ048>055-152300- ALBEMARLE VA-ALLEGANY MD-ANNE ARUNDEL MD- ARLINGTON/FALLS CHURCH/ALEXANDRIA VA-AUGUSTA VA-BERKELEY WV- CALVERT MD-CARROLL MD-CHARLES MD-CLARKE VA-CULPEPER VA- DISTRICT OF COLUMBIA DC-FAIRFAX VA-FAUQUIER VA-FREDERICK VA- FREDERICK MD-GRANT WV-GREENE VA-HAMPSHIRE WV-HARDY WV-HARFORD MD- HIGHLAND VA-HOWARD MD-JEFFERSON WV-KING GEORGE VA-LOUDOUN VA- MADISON VA-MINERAL WV-MONTGOMERY MD-MORGAN WV-NELSON VA- NORTHERN BALTIMORE MD-ORANGE VA-PAGE VA-PENDLETON WV- PRINCE GEORGES MD-PRINCE WILLIAM/MANASSAS/MANASSAS PARK VA- RAPPAHANNOCK VA-ROCKINGHAM VA-SHENANDOAH VA-SOUTHERN BALTIMORE MD- SPOTSYLVANIA VA-ST. MARYS MD-STAFFORD VA-WARREN VA-WASHINGTON MD- 1115 AM EDT TUE JUN 15 2004 ...SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EARLY EVENING... A WEAK BOUNDARY MOVING SOUTH ACROSS THE AREA WILL PRODUCE SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EARLY THIS EVENING. THE AIRMASS AHEAD OF THIS BOUNDARY IS FORECAST TO BECOME VERY UNSTABLE THIS AFTERNOON. WHILE WIDESPREAD SEVERE IS NOT EXPECTED...ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EARLY THIS EVENING. THE MOST LIKELY RISK FROM ANY SEVERE THUNDERSTORMS THIS AFTERNOON WILL BE DAMAGING WINDS IN EXCESS OF 60 MPH. ANY THUNDERSTORMS THIS AFTERNOON WILL PRODUCE TORRENTIAL DOWNPOURS...AND DANGEROUS CLOUD TO GROUND LIGHTNING. THE AREAS MOST LIKELY TO SEE SEVERE WEATHER ARE ALONG AND NORTH OF A LINE FROM WINCHESTER TO WASHINGTON DC BETWEEN 3 PM AND 8 PM. THOSE PLANNING OUTDOOR ACTIVITIES THIS AFTERNOON SHOULD REMAIN ALERT AND BE PREPARED TO SEEK SAFE SHELTER IF THREATENING WEATHER APPROACHES. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR THE LATEST INFORMATION. MANNING
The radar
The Sterling radar (KLWX), 77 km away, was scanning. The volume nearest the first event began at 20:34 UTC.
Event by event
3 thunderstorm wind, 1 flash flood. Local standard time, as filed.
Thunderstorm Wind, Washington
- When
- June 15, 3:45 PM EST
- Where
- Washington County, Boonsboro
- Measured
- 60 kt (69 mph) estimated gust
- Property damage
- $5,000
- Reported by
- GENERAL PUBLIC
- Coordinates
- 39.500, -77.650
Trees down in Boonsboro. Garage door and frame damaged on a home.
Thunderstorm Wind, Frederick
- When
- June 15, 4:30 PM EST
- Where
- Frederick County, Myersville
- Measured
- 55 kt (63 mph) estimated gust
- Property damage
- $1,000
- Reported by
- FIRE DEPT/RESCUE SQUAD
- Coordinates
- 39.500, -77.567
Large tree limbs and wires down.
Flash Flood, Montgomery
- When
- June 15, 5:20 PM EST to 8:20 PM EST
- Where
- Montgomery County, 5 mi W of Rockville
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 39.136, -77.204 (the zone’s center; the record gives no point)
Flooding in Travilah. Some roads were closed. Radar estimated 4 to 5 inches of rain fell in this area.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flooding and Damaging Wind in Virginia, June 15 to 16, 2004
- Rip Current in Florida, June 15, 2004
- Flash Flooding and Flooding in Ohio, June 15, 2004
- Flash Flood in Minnesota, June 15 to 16, 2004
- Flash Flood and Hail in Nebraska, June 15, 2004
- Tornadoes and Hail in Colorado, June 15, 2004
- Flash Flood in Ohio, June 15, 2004
- Tornadoes and Flash Flood in Kansas, June 15, 2004
- Flash Flooding and Hail in Kansas, June 15, 2004
- Flash Flood in Ohio, June 15, 2004
- Flash Flooding and Damaging Winds in Kansas, June 15, 2004
- Flash Flooding in Texas, June 15, 2004
More
Every storm in Maryland in 2004Every state in 2004This day in weather historyWarnings in Maryland, June 2004
Sources
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: 5406454, 5406457, 5406456, 5406455.