Unseasonably warm high pressure build over the Mid Atlantic ahead of a strong cold front. Scattered thunderstorms developed across western Maryland during the afternoon of September 26th in this warm and unstable air mass.
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.
Unseasonably warm high pressure build over the Mid Atlantic ahead of a strong cold front. Scattered thunderstorms developed across western Maryland during the afternoon of September 26th in this warm and unstable air mass. A storm in Washington County produced damaging winds that downed trees and power lines. Lightning was also responsible for an office building fire.
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 Sep 26, 1:50 PM EST, 3 hours 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 250 PM EDT WED SEP 26 2007 .SYNOPSIS... SCATTERED TO ISOLATED SHOWERS AND THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND LINGER THROUGH THE EVENING IN THE WARM AND HUMID AIRMASS. MEANWHILE...A COLD FRONT STRETCHING FROM THE GREAT LAKES THROUGH THE OHIO VALLEY TO CENTRAL TEXAS WILL CONTINUE TO MOVE EAST OVERNIGHT. THE FRONT IS EXPECTED TO MOVE THROUGH THE AREA TOMORROW NIGHT...ACCOMPANIED BY SCATTERED SHOWERS AND THUNDERSTORMS. HIGH PRESSURE AND A MORE SEASONABLE AIRMASS WILL SETTLE OVER THE MID ATLANTIC BEHIND THE FRONT. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/... A LEE TROUGH HAS DEVELOPED ALONG THE SPINE OF THE APPALACHIAN MTNS AHEAD OF AN APPROACHING COLD FRONT. THE FRONT CURRENTLY STRETCHES FROM THE GREAT LAKES THROUGH THE OHIO VALLEY INTO CENTRAL TEXAS. TEMPERATURES RANGE FROM THE MIDDLE 80S TO AROUND 90 IN MOST LOCALES. THIS ISNT MUCH DIFFERENT THAN YESTERDAYS READINGS AT THIS TIME...HOWEVER THERE IS CONSIDERABLE MORE CLOUD COVER. SCATTERED ACTIVITY IS ANTICIPATED WEST OF THE BLUE RIDGE FOR THE REMAINDER OF THE AFTERNOON AND EVENING. ANY CONVECTION EAST OF THE BLUE RIDGE SHOULD DIMINISH WITH THE HEATING OF THE DAY. HOWEVER...AREAS OF WEST OF THE BLUE RIDGE WILL HAVE PRECIP CHANCES OVERNIGHT WITH THE APPROACH OF THE FRONTAL BOUNDARY. THE MID AND UPPER ARE NOT VERY CONDUCIVE TO SEVERE THUNDERSTORM DEVELOPMENT THIS AFTERNOON/EVENING. THE MID LEVEL LAPSE RATES ARE POOR AND NO SHORTWAVE ENERGY IN SIGHT. THE UPPER JET AXIS IS FURTHER NORTH...AS IS THE BEST SHEAR. THE LOCAL WFR-ARW MODEL HAS SOME ISOLD CONVECTION DEVELOP OVER THE POTOMAC HIGHLANDS/SHENANDOAH VALLEY BUT HAS ANY ACTIVITY DIE DOWN AFTER THE LOSS OF HEATING. && .SHORT TERM /6 AM THURSDAY MORNING THROUGH 6 PM THURSDAY/... THE FRONTAL BOUNDARY WILL CONTINUE TO APPROACH DURING THE DAY TOMORROW. SHOULD BE MORE CLOUD COVER AROUND TOMORROW...WITH TEMPS A BIT COOLER THAN TODAY. SCATTERED SHOWERS AND THUNDERSTORMS WILL ACCOMPANY THE FRONT. THE MAIN MID AND UPPER LEVEL ENERGY SHOULD STAY NORTH...WITH A BAND OF FORCING ALONG THE FRONT. THERE ARE DIFFERENCES BETWEEN THE NAM AND GFS. BOTH MODELS HAVE BACKED OFF ON PRECIP TOTALS. A SURFACE LOW IS PROGGED TO DEVELOP ALONG THE EAST COAST OF FLORIDA AND MOVE UP TO THE CAROLINAS BY TOMORROW...KEEPING AREAS EAST OF THE BLUE RIDGE ON THE SUBSIDENT SIDE OF THE SURFACE LOW. HAVE TAILORED POPS CLOSE TO THE SREFS. && .LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/... H5 TROF AND ASSOCIATED CDFNT WILL SWING THRU THE AREA THU NIGHT WITH SHRA/TSRA LIKELY ALTHOUGH AMTS EXPECTED ON THE LIGHT SIDE. SYSTEM OVR S FL AND THE BAHAMAS EXPECTED TO RACE TO THE NE AHEAD OF THE FRONT AND PASS WELL EAST OF THE AREA. IMPACTS FROM THIS SYSTEM IF ANY WOULD BE TO INCREASE PRES GRADIENT/WINDS OVR THE MARINE AREA SOMEWHAT. AFTER THAT...HIGH PRES TO TAKE CONTROL OVER THE EAST WITH TRANQUIL CONDITIONS EXPECTED THROUGH THE NEXT SEVEN DAYS && .AVIATION /19Z WEDNESDAY THROUGH MONDAY/... SCT TSRA WEST OF THE BLUE RIDGE...WITH ISOLD ACTIVITY EAST OF THE MTNS THIS EVENING. CONVECTION EAST OF THE MTS SHOULD DIMINISH AFTER SUNSET...WITH PREFRONTAL PRECIP OVER THE WEST OVERNIGHT. SOME PATCHY MVFR FOG IS POSSIBLE...BUT WINDS SHOULD REMAIN SOUTHERLY AT 5 TO 10 KT. PRECIP CHANCES INCREASE TOMORROW WITH THE APPROACH OF THE FRONT. MODELS KEEP BULK OF PRECIP WEST OF THE CWFA UNTIL AFTER 18Z. NO MAJOR RESTRICTIONS TO CIG/VSBY IN THE EXTENDED. && .MARINE... HAVE KEPT THE SCA UP FOR CHANNELING OVERNIGHT. CURRENTLY ON THE BAY...SOUTHERLY WINDS OF 10 TO 15 KT ARE NOTED. THIS SHOULD INCREASE TO 15 TO 20 KT AS THE EVENING WEARS ON. WINDS BLO SCA EXPECTED DURING THE DAY TOMORROW. NO HEADLINES EXPECTED IN THE EXTENDED. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 4 AM EDT THURSDAY FOR ANZ531>534. && LISTEMAA/ROSA
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1037 AM EDT WED SEP 26 2007 ANZ530>537-DCZ001-MDZ003>007-009>011-013-014-016>018-501-502- VAZ021-025>031-036>042-050>057-WVZ050>055-501>504-271000- 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- 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-HIGHLAND- AUGUSTA-ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE- NELSON-ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-FAUQUIER-LOUDOUN- ORANGE-CULPEPER-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX- ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA- KING GEORGE-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-PENDLETON-HARDY- WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL- 1037 AM EDT WED SEP 26 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MARYLAND WEST OF THE EASTERN SHORE INCLUDING THE CHESAPEAKE BAY AND EAST OF GARRETT COUNTY...EASTERN WEST VIRGINIA...NORTHERN AND CENTRAL VIRGINIA... WASHINGTON DC AND THE TIDAL POTOMAC RIVER. .DAY ONE...TODAY AND TONIGHT A SMALL CRAFT ADVISORY HAS BEEN POSTED FOR THE CHESAPEAKE BAY FROM POOLES ISLAND SOUTH TO SMITH POINT FROM 4PM TODAY UNTIL 4 AM EARLY THURSDAY MORNING. SOUTHERLY CHANNELING WILL PRODUCE WIND GUSTS UP TO 20 KT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SMALL CRAFT ADVISORY CONDITIONS ARE LIKELY ON FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE REQUIRED AT THIS TIME.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 324 PM EDT WED SEP 26 2007 VAZ031-WVZ053-262030- CLARKE VA-JEFFERSON WV- 324 PM EDT WED SEP 26 2007 ...STRONG THUNDERSTORMS TO AFFECT CLARKE AND JEFFERSON COUNTIES... AT 324 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER BRIGGS...MOVING EAST AT 10 MPH. THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO 40 MPH. THE COMMUNITIES OF GAYLORD...WICKLIFFE AND RIPPON WILL BE AFFECTED BY THIS STORM.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 334 PM EDT WED SEP 26 2007 MDZ003-WVZ050-051-262030- WASHINGTON MD-HAMPSHIRE WV-MORGAN WV- 334 PM EDT WED SEP 26 2007 ...STRONG THUNDERSTORMS TO AFFECT WASHINGTON...HAMPSHIRE AND MORGAN COUNTIES... AT 334 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES EAST OF LEVELS...MOVING NORTHEAST AT 20 MPH. THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO 40 MPH. THE COMMUNITIES OF GREAT CACAPON...SMITH CROSSROADS...BERRYVILLE... BERKELEY SPGS...SHADY GROVE...SHADY GROVE AND HANCOCK WILL BE AFFECTED BY THIS STORM.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 459 PM EDT WED SEP 26 2007 MDZ003-WVZ052-262200- WASHINGTON MD-BERKELEY WV- 459 PM EDT WED SEP 26 2007 ...STRONG THUNDERSTORMS TO AFFECT WASHINGTON AND BERKELEY COUNTIES... AT 459 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER BERKELEY...MOVING NORTHEAST AT 40 MPH. THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO 40 MPH. THE COMMUNITIES OF WILLIAMSPORT...HAGERSTOWN AND LONG MEADOW WILL BE AFFECTED BY THIS STORM.
The Sterling radar (KLWX), 74 km away, was scanning. The volume nearest the first event began at 21:57 UTC.
1 thunderstorm wind, 1 lightning. Local standard time, as filed.
Newspaper clippings reported trees and power lines down in Hagerstown, MD. A tree fell across Bester Street, damaging a house and crushing a pickup truck.
Newspaper clippings reported an office building fire that was caused by a lightning strike. The building that housed 10 offices is salvagable, but there was significant damage to the top floor and roof and smoke and water damage on the lower floors.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2007Every state in 2007This day in weather historyWarnings in Maryland, September 2007
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: 54260, 54262.