A warm front moved north through the Mid Atlantic on the morning of July 30th, bringing increased heat and humidity to the region. An upper level disturbance then moved through the region during the afternoon.
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 warm front moved north through the Mid Atlantic on the morning of July 30th, bringing increased heat and humidity to the region. An upper level disturbance then moved through the region during the afternoon. This helped to trigger isolated showers and thunderstorms during the late afternoon and evening. A storm that moved over Baltimore County downed several trees and power lines.
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 Jul 30, 1:48 PM EST, 2 hours 12 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 248 PM EDT WED JUL 30 2008 .SYNOPSIS... A FRONTAL BOUNDARY WILL CROSS THE REGION THURSDAY. HIGH PRESSURE WILL BUILD OVER THE MID ATLANTIC FOR THE WEEKEND INTO NEXT WEEK. && .NEAR TERM /TONIGHT/... CONCERN IS FOR LATE AFTN/EVE HRS. STLT/LTNG PLOT SHOW AN ORGANIZED LN ACRS NW PA...W/ A SRN XTNSN ACROSS ERN KY. THIS IS IN ADVNC OF A WK CD FNT ACROSS MI. SREF/WRF SHOW THIS LN MOVG INTO THE DC/BALT AREAS 00-02Z. JUST SPOKE WITH SPC - THEY ARE CONTEMPLATING ISSUING A WATCH FOR THE MID ATLC WITHIN THE NEXT HR. WINDS/HAIL BIGGEST THREATS. AFTR MDNGT THINGS SHOULD BE CALMING DOWN. XPCTG SOME HZ/FG AFT MDNGT. LOWS M60S-L70S. && .SHORT TERM /THURSDAY/... WHILE I MAINTAINED THE CHC OF THUNDER IN THE ZNS FOR THU...PERHAPS THIS CHC SHOULD BE DOWNPLAYED. HOWEVER...CD FNT STILL HANGS TO THE N OF THE AREA...AND WHEN YOU HV A BOUNDARY IN THE AREA AT THE PEAK OF SUMMER THE ALWAYS A CHC. ANOTHER VERY WARM DAY W/ TEMPS IN L90S OVER MUCH OF THE AREA. && .LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/... HIGH PRESSURE AT THE SURFACE WILL BUILD THURSDAY NIGHT INTO FRIDAY BEHIND THE COLD FRONT. THE MIDNIGHT SHIFT MENTIONED THE GFS TRENDING TOWARDS AN MCS GOING THROUGH FRIDAY NIGHT THEN A WAVE OF LOW PRESSURE ON SUNDAY. THE NAM IS ALSO STARTING TO ACKNOWLEDGE SOME TYPE OF DISTURBANCE OR DISTURBANCES THIS WEEKEND. TIMING HAS BECOME AN ISSUE WITH THESE POSSIBLE FEATURES. HAVE ADDED A SILENT SLIGHT CHANCE POP FOR NOW SATURDAY AND WILL BE INCREASING CLOUD COVER FOR PORTIONS OF THE WEEKEND. HIGH PRESSURE WILL BE IN CONTROL FOR EARLY NEXT WEEK...BRINGING A RETURN OF HOT AND HUMID CONDITIONS. && .AVIATION /TONIGHT THROUGH MONDAY/... TSTMS MOVG INTO CENTRAL W.V. WL HV PTNL TO IMPACT ALL TAF SITES BTWN 22 AND 03Z. HVY RAIN AND STRONG WINDS ARE PSBL WITH THESE. IN PRE-DAWN HRS FOG IS PSBL. HIGH PRESSURE WILL BUILD OVER THE WEEKEND...BRINGING VFR CONDITIONS. && .MARINE... LGT WINDS TNGT AND TMRW. TSTMS PSBL DURG THE EVE HRS. HIGH PRESSURE WILL BUILD OVER THE WATERS FOR FRIDAY AND CONTINUE THROUGH THE WEEKEND. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE. && PRODUCTS...WOODY/SAR
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1115 AM EDT WED JUL 30 2008 ANZ530>537-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 311015- 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-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- 1115 AM EDT WED JUL 30 2008 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...THIS AFTERNOON AND TONIGHT HIGH TEMPERATURES IN THE LOWER AND MIDDLE 90S ALONG WITH HIGH HUMIDITY WILL CAUSE HEAT INDICES TO PEAK AROUND 100 DEGREES THIS AFTERNOON. AN UPPER-LEVEL DISTURBANCE WILL TRIGGER SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING. SOME THUNDERSTORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS AND HAIL. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN ON THURSDAY ALONG AND AHEAD OF A FRONTAL BOUNDARY. A FEW OF THE STORMS COULD BECOME STRONG TO SEVERE. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION MAY BE NEEDED THIS AFTERNOON. MDZ003>005-009-010-501-502-VAZ021-025>031-036>042-050-051- WVZ050>055-501>504-311015- WASHINGTON-FREDERICK MD-CARROLL-MONTGOMERY-HOWARD- 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-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-PENDLETON- HARDY-WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL- 1115 AM EDT WED JUL 30 2008 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...THIS AFTERNOON AND TONIGHT HIGH TEMPERATURES IN THE LOWER AND MIDDLE 90S ALONG WITH HIGH HUMIDITY WILL CAUSE HEAT INDICES TO PEAK AROUND 100 DEGREES THIS AFTERNOON ACROSS CENTRAL VIRGINIA. AN UPPER-LEVEL DISTURBANCE WILL TRIGGER SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING. SOME THUNDERSTORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS AND HAIL. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN ON THURSDAY ALONG AND AHEAD OF A FRONTAL BOUNDARY. A FEW OF THE STORMS COULD BECOME STRONG TO SEVERE. .SPOTTER INFORMATION STATEMENT... SKYWARN ACTIVATION MAY BE NEEDED THIS AFTERNOON.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 314 PM EDT WED JUL 30 2008 WVZ050-055-501>504-302015- EASTERN GRANT WV-EASTERN MINERAL WV-HAMPSHIRE WV-HARDY WV- WESTERN GRANT WV-WESTERN MINERAL WV- 314 PM EDT WED JUL 30 2008 ...STRONG THUNDERSTORMS TO AFFECT HARDY...HAMPSHIRE...WESTERN GRANT...EASTERN GRANT...WESTERN MINERAL AND EASTERN MINERAL COUNTIES... AT 314 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES WEST OF EMORYVILLE...MOVING EAST AT 34 MPH. THIS STORM WILL BE CAPABLE OF PRODUCING TORRENTIAL RAIN...SMALL HAIL AND WIND GUSTS TO 40 MPH. LOCALLY AROUND A HALF INCH OF RAIN WILL BE POSSIBLE. THE COMMUNITIES OF ANTIOCH...PURGITSVILLE...RUSSELLDALE...KIRBY AND DELRAY WILL BE AFFECTED BY THIS STORM THROUGH 4PM. HTS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 425 PM EDT WED JUL 30 2008 MDZ005-006-011-302100- CARROLL MD-NORTHERN BALTIMORE MD-SOUTHERN BALTIMORE MD- 425 PM EDT WED JUL 30 2008 ...STRONG THUNDERSTORMS TO AFFECT CARROLL AND BALTIMORE COUNTIES... AT 425 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES NORTHWEST OF RANDALLSTOWN...MOVING EAST AT 20 MPH. THE COMMUNITIES OF OWINGS MILLS...RANDALLSTOWN AND PIKESVILLE WILL BE AFFECTED BY THIS STORM. SMALL HAIL AND LOCALIZED WIND GUSTS UP TO 40 MPH WILL BE POSSIBLE. KRAMAR
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 434 PM EDT WED JUL 30 2008 MDZ010-014-302100- ANNE ARUNDEL MD-HOWARD MD- 434 PM EDT WED JUL 30 2008 ...STRONG THUNDERSTORM TO AFFECT HOWARD AND NORTHWESTERN ANNE ARUNDEL COUNTIES... AT 434 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER SIMPSONVILLE...MOVING EAST AT 20 MPH. STORM INTENSITY WAS INCREASING...AND THE STORM WILL SOON BE CAPABLE OF PRODUCING SMALL HAIL AND LOCALIZED WIND GUSTS TO 40 MPH. THE COMMUNITIES OF ELKRIDGE AND SAVAGE WILL BE AFFECTED BY THIS STORM. KRAMAR
The Sterling radar (KLWX), 85 km away, was scanning. The volume nearest the first event began at 21:00 UTC.
3 thunderstorm wind. Local standard time, as filed.
Local broadcast media reported a tree fell onto a moving train at the Falls Road Station.
A trained spotter reported several trees uprooted or snapped near the intersection of Gateridge Road and Stillway Court.
Baltimore County Emergency Management reported several trees down in Cockeysville.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2008Every state in 2008This day in weather historyWarnings in Maryland, July 2008
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: 118514, 118515, 118516.