Alert archive / Maryland / Flash Flood Warnings in 2000
Flash Flood Warning 7, NWS Baltimore/Washington
NWS Baltimore/Washington issued this flash flood warning at Jun 26, 2000, 5:40 PM EDT for Montgomery County, Maryland. It was in force for 65 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
- Jun 26, 2000, 5:40 PM EDT (21:40 UTC)
- Expired
- Jun 26, 2000, 6:45 PM EDT
- In force
- 65 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 21:39 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 12:00Z, 9.7 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.
- Mixed-layer CAPE
- 130 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 979 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS51 KLWX 262141 FFWLWX MDC031-262245- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 540 PM EDT MON JUN 26 2000 THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * FLASH FLOOD WARNING FOR... MONTGOMERY COUNTY IN CENTRAL MARYLAND * UNTIL 645 PM EDT * AT 540 PM EDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN 7 MILES SOUTHWEST OF POOLESVILLE...MOVING NORTHEAST AT 25 MPH. * THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE NEAR... POOLESVILLE AT 548 PM EDT BOYDS AT 602 PM EDT GERMANTOWN AT 606 PM EDT GAITHERSBURG AT 608 PM EDT DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. TO REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN STERLING VIRGINIA. JA/DMW
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 Jun 26, 2:30 PM EDT, 3 hours 10 minutes earlier.
Area forecast discussion, Jun 26, 2:30 PM EDT, 3 hours 10 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON 230 PM EDT MON JUN 26 2000 MDL GUIDANCE LATE THIS AFTRN AND USING ICWF...SO FCST BASED ON 00Z CYCLE WITH LAST MINUTE INPUT FROM WHAT IS AVBL FROM THE 12Z CYCLE. ATMS OVR THE AREA CONTS UNSTABLE THIS AFT. NO SYNOPTIC SCALE TRIGGER TO ACT ON. HOWEVER...ISOLD/SCT CNVCTN PSBL THRU EARLY EVE ALONG MESOSCALE FEATURES AND OVR MTNS WHERE OROGRAPHIC LIFT WL ENHANCE DVLPMT. AFTER SUNSET...EXPECT ACTIVITY TO DIE OFF AND BE GONE BY MIDNGT. LOOKS LIKE A BETTER CHC OF MORE ORGANIZED CONVECTION ON TUE. SHRTWV MVS TOWARD THE AREA FM W. THE ASSOCD SFC BNDRY APPROACHES DURING THE AFT/EVE HRS. WILL CONTINUE WITH THE IDEA OF LIKELY POPS. WL WORD IT AS AFT/EVE OVR THE MTNS AND LATE AFT/EVE E OF THE MTNS. SFC BNDRY GETS HUNG UP OVR THE AREA TUE NIGHT AND WED AS IT BECOMES PARALLEL TO UPR LVL FLO SO WL KEEP POPS IN FCST INTO 4TH PD. FCSTID = 15 .LW!X... DC...NONE. MD...NONE. VA...NONE. WV...NONE.
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 25, 8:52 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 38 min |
| Jun 25, 9:02 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 58 min |
| Jun 25, 9:48 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore | 42 min |
| Jun 25, 11:48 PM EDT | Flash Flood Warning | LWX | Montgomery | 117 min |
| Jun 26, 12:56 AM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Howard, Prince George's | 64 min |
| Jun 26, 1:11 AM EDT | Severe Thunderstorm Warning | LWX | Baltimore, City of Baltimore | 49 min |
| Jun 26, 3:52 PM EDT | Severe Thunderstorm Warning | LWX | Howard, Montgomery | 38 min |
| Jun 26, 4:24 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 51 min |
| Jun 26, 4:30 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 45 min |
| Jun 26, 4:46 PM EDT | Flash Flood Warning | LWX | Howard, Montgomery | 59 min |
| Jun 26, 6:17 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 43 min |
Nearby
Flash Flood Warnings in Maryland, 2000Every flash flood warning in 2000
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.