A few strong to severe thunderstorms occurred on August 29 and 30 as a frontal boundary sagged south into the Mid Atlantic.
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 few strong to severe thunderstorms occurred on August 29 and 30 as a frontal boundary sagged south into the Mid Atlantic.
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 29, 1:20 PM EST, 2 hours 26 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 220 PM EDT TUE AUG 29 2006 .SHORT TERM...TONIGHT AND WEDNESDAY... VERY WARM AND HUMID ACROSS MUCH OF THE CWFA THIS AFTN WITH DEWPOINTS IN THE MID 70S MANY AREAS E OF THE BL RIDGE. LOW PRES WAVE SEEPING INTO NE MD AND PROMOTING INCREASING LOW LVL ENV SHEAR. WILL CONTINUE TO MONITOR FOR SPINNING CELLS WITH TOR BOX IN PLACE OVER NE MD. ADTNL CONVECTION COULD BEGIN TO FIRE AFTER 4 PM TO THE SOUTH SUCH AS LOWER SRN MD AND THE PIEDMONT...WHERE MORE A STRAIGHT LINE WIND THREAT THERE. WILL MAINTAIN LIKELY POPS THROUGH ABOUT 01Z E OF THE BLUE RIDGE THIS EVNG WITH A RAPID DECREASE IN POP COVERAGE DUE TO DECREASING DIURNALLY-ENHANCED INSTABILITY. ON WEDNESDAY EXPECT INITIAL TROPICAL PLUME TO BEGIN AFFECTING OUR AREA BY LATE AFTN WITH POPS INCREASING WITHIN INVERTED TROUGH AXIS THANKS TO ADVANCING TROP SYSTEM. CLOUD COVER WILL PLAY HAVOC ON TEMP FCST WITH SOLID ONSHORE FLOW BRINGING IN MARINE SAT LOW LEVELS WHICH WILL KEEP TEMPS MUCH COOLER TO THE NORTH. GFS MOS TEMPS ARE THE COOLEST AND LEANED THAT WAY BUT NOT QUITE SO COOL. && .LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY... THE MEDIUM RANGE AND LONG TERM FORECASTS WILL DEPEND ON THE EVENTUAL TRACK AND INTENSITY OF TROPICAL SYSTEM ERNESTO. IF CURRENT MODEL ANALYSIS IS CORRECT...LOOKS LIKE THE BEGINNING OF LABOR DAY WEEKEND WILL BE PRETTY BUSY. INVERTED TROUGH SETS UP AHEAD OF TROPICAL STORM ERNESTO...EXTENDING FROM THE DEEP SOUTH NORTH THROUGH THE MID ATLANTIC. A 500 MB TROUGH EXTENDING FROM EASTERN CANADA SOUTHWEST INTO THE OHIO RIVER VALLEY SWINGS THROUGH THE REGION LATER IN THE WEEK. THE COMBINATION OF HIGH MOISTURE CONTENT WITH THE APPROACHING UPPER TROUGH AXIS AND THE INVERTED TROUGH AHEAD OF ERNESTO WILL PROVIDE PLENTY OF RAIN FOR THE REGION. HPC QPF VALUES INDICATE A POSSIBILITY OF SEVERAL INCHES FLOODING CONCERN FOR LOWER SOUTHERN MARYLAND AND LOCATIONS ACROSS THE EASTERN FORECAST AREA OVERNIGHT THURSDAY AND INTO FRIDAY MORNING. THE 15Z FORECAST TRACK FROM TPC SHOWS ERNESTO TRACKING THROUGH THE WESTERN HALF OF THE FORECAST AREA. ALTHOUGH A WESTWARD TREND WAS NOTED FOR PREVIOUS FORECASTS...THE 12Z GFS AND NAM BRING THE SYSTEM BACK TO THE EAST. BASED ON THE CURRENT 15Z TRACK...WOULD EXPECT THE PRIMARY THREAT TO BE FLOODING...FLASH FLOODING...AND COASTAL FLOODING. THE POTENTIAL ALSO EXISTS FOR SEVERE AND TORNADIC THREATS. THIS SYSTEM LOOKS TO IMPACT THE AREA LATE FRIDAY AND INTO SATURDAY. WILL CONTINUE TO HIGHLIGHT THREATS WITHIN THE HWO.CONTINUE TO MONITOR STATEMENTS ISSUED FROM TPC FOR FURTHER UPDATES ON THE TRACK OF ERNESTO. && .AVIATION... TEMPO GROUPS IN PLACE FOR STRONG TSRA THIS EVNG BWI/MTN/DCA. CIGS/VSBY CONCERN LATE TNGT POST FRONTAL WITH WEAK PUSH BEHIND FRONT...ACTUALLY WE START TO RE-DVLP ONSHORE FLOW BY EARLY WED IN ADVANCE OF TROUGHINESS FROM TROP SYSTEM. HAVE INDICATED MVFR-IFR CONDS IN THIS ENVIRONMENT FOR NOW WHICH MAY NEED TO BE LOWERED FURTHER ON THE EVENING SET DEPENDING ON DOMINANT CONDS. && .MARINE... WILL MAINTAIN SCA THIS EVENING IS PREFRONTAL SOUTHERLY FLOW. GUSTS ON THE BAY NEAR SCA ATTM. CURRENT TPC TRACK WOULD IMPLY MARINE AND COASTAL IMPACTS FROM TROPICAL STORM ERNESTO BEGINNING LATER THIS WEEK AND CONTINUING THROUGH MUCH OF THE WEEKEND. THE EVENTUAL LOCATION...TIMING AND STRENGTH OF THIS SYSTEM ARE STILL UNCERTAIN. HOWEVER...THE STORM WILL HAVE SOME IMPACT ON THE WATERS. SOUTHERLY AND EASTERLY FLOW AHEAD OF AND ASSOCIATED WITH THIS SYSTEM COASTAL FLOODING CONCERNS. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...SMALL CRAFT ADVISORY FOR ANZ530>534 TIL 10 PM THIS EVNG. && JB/SEA
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 236 PM EDT TUE AUG 29 2006 ANZ530>537-DCZ001-MDZ002>007-009>011-013-014-016>018-VAZ021- 025>031-036>042-050>057-WVZ048>055-301000- 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-ALLEGANY-WASHINGTON-FREDERICK MD-CARROLL- NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE- PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-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-GRANT-MINERAL-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON- PENDLETON-HARDY- 236 PM EDT TUE AUG 29 2006 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...THIS AFTERNOON AND TONIGHT SHOWERS AND THUNDERSTORMS ARE EXPECTED ALONG AND EAST OF THE INTERSTATE 95 CORRIDOR THIS AFTERNOON AND EVENING...WITH A FEW SEVERE THUNDERSTORMS POSSIBLE WITH THIS ACTIVITY. THE MAIN THREAT FROM THUNDERSTORMS WILL BE DAMAGING WINDS...ALTHOUGH ISOLATED TORNADOES COULD ALSO DEVELOP DUE TO FAVORABLE WIND PROFILES. A SMALL CRAFT ADVISORY REMAINS IN EFFECT FOR THE CHESAPEAKE BAY THROUGH MID EVENING FOR WINDS OF AROUND 20 KNOTS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE INTERACTION OF HIGH PRESSURE TO THE NORTH AND TROPICAL SYSTEM ERNESTO TO THE SOUTH WILL LEAD TO A PROLONGED PERIOD OF EAST TO NORTHEAST ONSHORE WINDS THROUGH LATE WEEK. THESE WINDS MAY CAUSE COASTAL FLOODING TO DEVELOP ON THE WESTERN SHORE OF THE CHESAPEAKE BAY AND TIDAL POTOMAC. WHILE THE EXACT TRACK OF TROPICAL SYSTEM ERNESTO REMAINS UNCERTAIN...THE POTENTIAL EXISTS FOR PROLONGED HEAVY RAINS DUE TO THE REMNANTS OF THE TROPICAL SYSTEM MOVING THROUGH THE MID ATLANTIC. THESE HEAVY RAINS OVER SEVERAL DAYS THROUGH THE UPCOMING LABOR DAY WEEKEND COULD LEAD TO SIGNIFICANT FLOODING PROBLEMS. IN ADDITION...WINDS FROM THE TROPICAL SYSTEM COULD REQUIRE SMALL CRAFT ADVISORIES TO BE POSTED AS EARLY AS FRIDAY AND LASTING THROUGH THE WEEKEND FOR THE TIDAL WATERS. .SPOTTER INFORMATION STATEMENT... SPOTTERS HAVE BEEN ACTIVATED FOR THE BALTIMORE/WASHINGTON AND SOUTHERN MARYLAND AREAS FOR THIS AFTERNOON AND EVENING DUE TO POTENTIAL SEVERE WEATHER. A TORNADO WATCH IS ALREADY IN PLACE FOR A PORTION OF NORTHEAST MARYLAND. JB
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1150 AM EDT TUE AUG 29 2006 DCZ001-MDZ004>007-009>011-013-014-016>018-VAZ041-042-052>055-057- 292200- DISTRICT OF COLUMBIA-FREDERICK MD-CARROLL-NORTHERN BALTIMORE- HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE-PRINCE GEORGES- ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-FAUQUIER-LOUDOUN- PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX- ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-KING GEORGE- INCLUDING THE CITIES OF...WASHINGTON...FREDERICK...WESTMINSTER... GAITHERSBURG...COLUMBIA...BALTIMORE...ANNAPOLIS...WALDORF... ST MARYS CITY...LEESBURG...MANASSAS...MANASSAS PARK...FAIRFAX... ALEXANDRIA...FALLS CHURCH 1150 AM EDT TUE AUG 29 2006 ...SEVERE THUNDERSTORMS WITH ISOLATED TORNADOES POSSIBLE THIS AFTERNOON AND EVENING... LOW PRESSURE OVER WESTERN PENNSYLVANIA IS EXPECTED TO DROP SOUTHEAST INTO THE WASHINGTON/BALTIMORE REGION THIS AFTERNOON. MEANWHILE THE ATMOSPHERE WILL BECOME VERY UNSTABLE FROM DAYTIME HEATING. NUMEROUS TO WIDESPREAD SHOWERS AND THUNDERSTORMS WILL DEVELOP DURING THE MID TO LATE AFTERNOON AND A FEW OF THESE STORMS MAY REACH SEVERE LIMITS...WITH THE MAIN THREATS FROM DAMAGING STRAIGHT LINE WINDS AND POSSIBLY A FEW TORNADOES. THE PRIMARY AREA FOR THE SEVERE THUNDERSTORM THREAT IS EAST OF FREDERICK MD TO THE CHESAPEAKE BAY...SOUTH TO POINT LOOKOUT MD...INCLUDING THE BALTIMORE AND WASHINGTON AREAS. IN ADDITION...HEAVY RAINFALL WILL BE POSSIBLE WITH ANY THUNDERSTORMS...WHICH COULD LEAD TO THE DEVELOPMENT OF FLASH FLOODING. PLEASE CONTINUE TO MONITOR NOAA ALL-HAZARDS RADIO OR LOCAL MEDIA OUTLETS FOR THE LATEST UPDATES ON THIS DEVELOPING WEATHER SITUATION. JB
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 436 PM EDT TUE AUG 29 2006 VAZ055-292050- STAFFORD VA- 436 PM EDT TUE AUG 29 2006 ...A STRONG THUNDERSTORM IS MOVING THROUGH STAFFORD COUNTY... AT 4:35 PM...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER MOUNTAIN VIEW...MOVING EAST AT 25 MPH. THIS STORM WILL LIKELY PRODUCE GUSTY WINDS UP TO 40 MPH AND BRIEF VERY HEAVY RAIN. THE COMMUNITIES OF GARRISONVILLE...RECTORY...AND ROSEVILLE WILL BE AFFECTED BY THIS STORM THROUGH 5 THIS AFTERNOON. STRONG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 439 PM EDT TUE AUG 29 2006 MDZ016-292130- CHARLES MD- 439 PM EDT TUE AUG 29 2006 ...STRONG THUNDERSTORM MOVING INTO CHARLES COUNTY... AT 439 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES WEST OF INDIAN HEAD...MOVING SOUTHEAST AT 25 MPH. THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO 50 MPH. THE COMMUNITIES OF FAULKNER...HUGHESVILLE...INDIAN HEAD... IRONSIDES...LA PLATA AND PATUXENT WILL BE AFFECTED BY THIS STORM THROUGH 530 PM EDT. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE WARNINGS ARE ISSUED. MANNING
The Sterling radar (KLWX), 51 km away, was scanning. The volume nearest the first event began at 20:47 UTC.
1 thunderstorm wind. Local standard time, as filed.
A tree was downed near Glymont. A tree was also down in Waldorf.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2006Every state in 2006This day in weather historyWarnings in Maryland, August 2006
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: 5526267.