Alert archive / Maryland / Flash Flood Warnings in 2001

Flash Flood Warning 54, NWS Baltimore/Washington

September 24, 2001Montgomery County, Maryland

NWS Baltimore/Washington issued this flash flood warning at Sep 24, 2001, 9:06 PM EDT for Montgomery County, Maryland. It was in force for 114 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 24, 2001, 9:06 PM EDT (01:06 UTC)
Expired: Sep 24, 2001, 11:00 PM EDT
In force: 114 min
Issued by: NWS Baltimore/Washington
Area: Whole counties

County Montgomery County, MD

The radar

The Sterling radar (KLWX), 30 km from the middle of the area, began a volume at 01:08 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.1 hours before the alert went out and 27 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 26 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 465 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 231 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Sep 24, 8:15 PM EDT, 51 minutes earlier.

Area forecast discussion, Sep 24, 8:15 PM EDT, 51 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
815 PM EDT MON SEP 24 2001

WILL BE ISSUING QUICK UPDATE TO REMOVE MENTION OF TORNADO WATCH AND
SVR WORDING. MESO LOW ASSOC WITH ROTATIONAL STORMS SEEMS TO HAVE
MOVED N OF CWA. MAIN THREAT IS TRAINING ECHOS AND FLASH FLOODING
NEXT FEW HOURS.

.LWX...
DC...NONE.
MD...NONE
VA...NONE.
WV...NONE.

MMARGRAF

In the hours before

Local storm report, Sep 24, 3:48 PM EDT, 5 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
348 PM EDT MON SEP 24 2001

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0335 PM    5 SW WARRENTON            VA   TORNADO
09/24/01   FAUQUIER                       ROOFS BLOWN OFF ONTO ROUTE
                                          211 NEAR ROUTE 681.
                                          REPORTED BY LAW
                                          ENFORCEMENT.

MKM

Local storm report, Sep 24, 4:06 PM EDT, 5 hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
406 PM EDT MON SEP 24 2001

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0359 PM    THE PLAINS                VA   TORNADO
09/24/01   FAUQUIER                       NUMEROUS REPORTS OF DAMAGE
                                          INCLUDING POWER LINES AND
                                          TREES DOWN AND DAMAGE TO
                                          HOMES. REPORT FROM 911.

MKM

Local storm report, Sep 24, 4:13 PM EDT, 4 hours 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
413 PM EDT MON SEP 24 2001

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0300 PM    CULPEPER                  VA   TORNADO
09/24/01   CULPEPER                       *** 1 INJ ***
                                          MOBILE HOME DAMAGED AND
                                          ONE PERSON INSIDE INJURED.
                                          REPORTED BY 911.

MKM

Special weather statement, Sep 24, 4:13 PM EDT, 4 hours 53 minutes before

DCZ001-MDZ003>007-009>011-013-014-016>018-VAZ028-030-031-039>042-
050>057-WVZ051>053-250000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
413 PM EDT MON SEP 24 2001

...A TORNADO WATCH IS IN EFFECT UNTIL 8 PM THIS EVENING...

A TORNADO WATCH HAS BEEN ISSUED FOR THE EASTERN THIRD OF VIRGINIA...
THE EASTERNMOST THREE COUNTIES IN WEST VIRGINIA... AND ALL OF
MARYLAND WEST OF THE BAY WITH THE EXCEPTION OF GARRETT AND ALLEGANY
COUNTIES. THIS ALSO INCLUDES THE DISTRICT OF COLUMBIA AND THE WATERS
OF THE TIDAL POTOMAC AND THE CHESAPEAKE BAY.

A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR TORNADO
FORMATION THIS AFTERNOON AND EVENING. THE NATIONAL WEATHER SERVICE
WILL BE MONITORING THESE STORMS...AND WILL ISSUE WARNINGS IF
TORNADOES OR ANY OTHER SEVERE WEATHER IS IMMINENT IN YOUR AREA.
SEVERAL REPORTS OF TORNADOES HAVE ALREADY COME IN FROM NORTHERN AND
NORTH CENTRAL VIRGINIA. BE PREPARED TO TAKE SHELTER IF A WARNING IS
ISSUED FOR YOUR COUNTY OR CITY. STAY AWAY FROM WINDOWS IN A LOW
LEVEL INTERIOR ROOM.

A DEVELOPING LOW PRESSURE SYSTEM AND AN ASSOCIATED COLD FRONT WILL
MOVE ACROSS THE MID ATLANTIC STATES THIS AFTERNOON AND EVENING.
SHOWERS AND THUNDERSTORMS WILL ACCOMPANY THIS WEATHER SYSTEM AS IT
MOVES THROUGH THE AREA. AS THESE STORMS MOVE EAST OVER THE AREA...
THEY WILL HAVE THE POTENTIAL TO PRODUCE DAMAGING WINDS... HAIL...
AND TORNADOES.

ALSO... HEAVY RAINFALL FROM THESE STORMS MAY RESULT IN ISOLATED
FLOODING... ESPECIALLY IN URBAN AREAS AND IN LOW LYING AREAS NEAR
CREEKS AND STREAMS.

THE SKYWARN SPOTTER ACTIVATION NETWORK HAS BEEN ACTIVATED.

STAY TUNED TO NOAA WEATHER RADIO OR OTHER MEDIA OUTLETS FOR UPDATED
FORECASTS... STATEMENTS... AND POSSIBLE WARNINGS.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT
HTTP://WWW.NWS.NOAA.GOV/ER/LWX

STRONG

Local storm report, Sep 24, 7:44 PM EDT, 1 hour 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
744 PM EDT MON SEP 24 2001

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0300 PM    CULPEPER                  VA   TORNADO
09/24/01   CULPEPER                       *** 2 INJ ***
                                          THREE TRAILER HOMES
                                          DESTROYED AND FOUR DAMAGED
                                          ON PONDEROSA COURT.

0300 PM    COUNTYWIDE                VA   TORNADO
09/24/01   CULPEPER                       BUILDINGS DAMAGED ON
                                          INDIAN FORK RD... SPRINGS
                                          ROAD... MOSER LANE... OAK
                                          SHADE ROAD AND SCOTTSVILLE
                                          ROAD. THREE CHURCHES
                                          DAMAGED.

0300 PM    NORTH PORTION             VA   TORNADO
09/24/01   CULPEPER                       TORNADO DAMAGE PATH
                                          VISIBLE 5 MILES S OF THE
                                          RAPPAHANNOCK RIVER NEAR
                                          ROUTE 211. REPORTED BY
                                          SKYWARN.

0310 PM    JEFFERSONTON              VA   TORNADO
09/24/01   CULPEPER                       NUMEROUS TREES DOWNED ON
                                          HOUSES IN ROUTE 229 AND 211
                                          AREA. TWO HOUSES DAMAGED.

0345 PM    SOUTH PORTION             VA   TORNADO
09/24/01   ORANGE                         SPOTTED ON ROUTE 33.
                                          REPORTED BY EMERGENCY
                                          MANAGEMENT.

0355 PM    1 W THE PLAINS            VA   TORNADO
09/24/01   FAUQUIER                       SPOTTER REPORTED TORNADO
                                          AND SWIRLING DEBRIS.

0450 PM    FRANCONIA                 VA   TORNADO
09/24/01   FAIRFAX                        RESTAURANT ROOF DAMAGED.
                                          TREES DOWN. REPORTED BY
                                          911.

0450 PM    SPRINGFIELD               VA   TORNADO
09/24/01   FAIRFAX                        TORNADO SPOTTED NEAR
                                          SPRINGFIELD METRO AT
                                          FRANCONIA PARKWAY.

0500 PM    SHIRLINGTON               VA   TORNADO
09/24/01   ARLINGTON                      WINDOWS BLOWN OUT AT
                                          RESTAURANT. REPORTED BY
                                          MEDIA.

0502 PM    ARLINGTON                 VA   TORNADO
09/24/01   ARLINGTON                      TORNADO SPOTTED BY
                                          NATIONAL AIRPORT WEATHER
                                          OBSERVER. ANOTHER SPOTTER
                                          SAW TORNADO SOUTH OF
                                          PENTAGON NEAR I-395.

0503 PM    CRYSTAL CITY              VA   TORNADO
09/24/01   ARLINGTON                      NATIONAL AIRPORT SPOTTER
                                          SAW TORNADO TOUCH DOWN IN
                                          CRYSTAL CITY.

0506 PM    DISTRICT OF COLUMBIA      DC   TORNADO
09/24/01   DISTRICT OF COLUMBIA           FUNNEL CLOUD SPOTTED NEAR
                                          14TH STREET BRIDGE.

0520 PM    LAUREL                    MD   TORNADO
09/24/01   PRINCE GEORGES                 LARGE TREES DOWN NEAR
                                          LAUREL HOSPITAL. REPORTED
                                          BY SPOTTER.

0520 PM    BELTSVILLE                MD   TORNADO
09/24/01   PRINCE GEORGES                 WIDESPREAD DAMAGE REPORTED
                                          NEAR ROUTE 1 AND BELTWAY
                                          AND CHERRY HILL ROAD. TOWER
                                          BENT. TREES ON HOUSES.
                                          TRACTOR TRAILER BLOWN OVER.
                                          POWER POLES SNAPPED.

0524 PM    COLLEGE PARK              MD   TORNADO
09/24/01   PRINCE GEORGES                 *** 2 DEAD ***
                                          HEAVY DAMAGE IN UNIVERSITY
                                          OF MARYLAND AREA AND ROUTE
                                          1 COORIDOR. TWO PEOPLE WERE
                                          KILLED WHEN THEIR CAR WAS
                                          FLIPPED OVER.

0545 PM    NORTH LAUREL              MD   TORNADO
09/24/01   HOWARD                         30 TOWNHOUSES DAMAGED IN
                                          SAVAGE AND LAUREL AREA.
                                          REPORTED BY 911.

0655 PM    LEESBURG                  VA   FLASH FLOODS
09/24/01   LOUDOUN                        ROUTE 7 BYPASS AT SYCOLYN
                                          ROAD FLOODED. MILE MARKER 8
                                          WESTBOUND GREENWAY FLOODED.
                                          REPORTED BY SKYWARN.

MKM

Special weather statement, Sep 24, 8:30 PM EDT, 36 minutes before

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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 24, 8:25 PM EDT	Flash Flood Warning	LWX	Fauquier, Loudoun	110 min

Nearby

Flash Flood Warnings in Maryland, 2001 Every flash flood warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.