An area of thunderstorms with very heavy rainfall and frequent lightning remained stationary over southwest Allegany County between 4 and 7 PM EDT on the 3rd. Radar estimated that three inches of rain fell along Dan's Mountain near the border of Grant County.
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The episode as NWS LWX wrote it up.
An area of thunderstorms with very heavy rainfall and frequent lightning remained stationary over southwest Allegany County between 4 and 7 PM EDT on the 3rd. Radar estimated that three inches of rain fell along Dan's Mountain near the border of Grant County. This caused George's Creek to overflow its banks and flood Old Route 936 between Midland and Shaft. Property between Midland and Shaft was also damaged by a "wave of water" that cascaded down Dan's Mountain. The most concentrated area of flooding was in the community of National where several roads were closed.
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 3, 1:30 PM EST, 2 hours 16 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON 230 PM EDT FRI AUG 3 2001 THREE THINGS TO BE AFFECTING OUR WEEKEND. NUMBER ONE IS A DYING COLD FRONT THAT WILL BE MOVING OVR THE REGION AND STALLING. NUMBER TWO IS A S/W DRVNG RA AND SHRA OVR PA AND OH THIS AFTERNOON. NUMBER THREE IS A LARGE S/W OVR CAPE HATTRS. FRONT AND S/W NUM 1 WILL MOVE OVR THE MTNS TNT. THIS WILL ALL SLOW TO A CRAWL AS S/W NUM 2 OVR CAPE HAT REMAINS STATIONARY KEEPING NUM 1 AT BAY. AS S/W 1 IS DIVRTD SOUTH TOWRDS THE DEEP SOUTH AND S/W 2 REMAINS OVR THE CAPE...WE WILL BE LEFT IN THE DOLDRUMS BETWEEN THE TWO WHICH WILL KEEP US WITH A LACK OF SYNPOTIC SCALE LIFT. HOWEVER...WITH THE DISSIPATING SFC BOUNDARY AND A LOT OF ATMSPHRC RH THNK THERE WILL BE SOME CONVTN ON SAT. CAPE VALS ARE MODRTLY LOW AND GNRLLY BELO 2000 J/KG. PWATS ARE HIGH MAXING OUT AROUND 1.75 INCHES IN THE RH CHANNEL OVR THE REGION. CLD CVR WILL BE PARTLY TO MOSTLY CLOUDY...AM LEANING TWDS THE LATTER. BY SUN...THE FRNT PUSHES A BIT MORE TO THE SOUTH...ALLOWING MORE OF AN EASTERLY FLOW...BUT NOT MUCH CHGS THROUGH THE REST OF THE ATMOSPHERE FROM SAT. VALS ABVE ARE ROUGHLY THE SAME IF NOT SLGTLY LOWR. WILL PROB GO 20 OR 30 POP FOR SUN WITH PSUNNY SKIES. AS FOR TNT...AGREE WITH SPC/S LINE FOR CHC OF TSRA TNT FOR ALL BUT LWR S MD. BEST CHC WILL BE IN THE NW ZONES...FALLING OFF TO THE SE. IN THE EXTNDED...CHC OF RAIN TUE AND WED AS ANOTHER WK FRNT STALLS OVR THE REGION. THEN AGAIN ON FRI...BUT THIS WILL BE CONTINGENT ON THE LATER PROGRESS OF BARRY THE TROPICAL STORM. WEAKNESS REMAINS OVR THE EAST THRU WED. MINI RIDGE POSSBLE THURS ACCRDNG TO THE MRF...BUT WOULDN/T COUNT ON IT AT THIS EARLY STAGE. .LWX...NONE. STRONG
The Sterling radar (KLWX), 127 km away, was scanning. The volume nearest the first event began at 20:45 UTC.
1 flash flood. Local standard time, as filed.
Several roads were closed by flooding after George's Creek and other waterways overflowed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maryland in 2001Every state in 2001This day in weather historyWarnings in Maryland, August 2001
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: 5263681.