Alert archive / West Virginia / Flash Flood Warnings in 2000

Flash Flood Warning 24, NWS Baltimore/Washington

August 2, 2000Grant County, Hardy County, Pendleton County, West Virginia

NWS Baltimore/Washington issued this flash flood warning at Aug 2, 2000, 4:31 PM EDT for Grant County, Hardy County, Pendleton County, West Virginia. It was in force for 119 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Aug 2, 2000, 4:31 PM EDT (20:31 UTC)
Expired
Aug 2, 2000, 6:30 PM EDT
In force
119 min
Issued by
NWS Baltimore/Washington
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Grant County, WV, Hardy County, WV, Pendleton County, WV

The radar

The Sterling radar (KLWX), 155 km from the middle of the area, began a volume at 20:30 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

Roanoke, VA (KRNK), launched 12:00Z, 8.5 hours before the alert went out and 184 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-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2000-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 82 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2000-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
82 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
851 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
30 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS51 KLWX 022043
FFWLWX
WVC023-031-071-022130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
431 PM EDT WED AUG 2 2000

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GRANT COUNTY IN EASTERN WEST VIRGINIA
  HARDY COUNTY IN EASTERN WEST VIRGINIA
  PENDLETON COUNTY IN EASTERN WEST VIRGINIA

* UNTIL 630 PM EDT

* AT 435 PM EDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY
  HEAVY RAIN AT THE RATE OF 2 TO 3 INCHES PER HOUR OVER UPPER
  TRACK AND SENECA ROCKS AND AREAS TO THE NORTH AND NORTHEAST...
  MOVING NORTHEAST AT 5 MPH.

* THIS IS A CLUSTER OF THUNDERSTORMS WITH EXCESSIVE RAINFALL WHICH
  WILL LIKELY MOVE INTO SOUTHERN GRANT AND HARDY COUNTIES. HOWEVER
  ADDITIONAL THUNDERSTORM ACTIVITY WILL BE MOVING ACROSS THE SAME
  AREAS DURING THE NEXT COUPLE HOURS FROM THE SOUTH-SOUTHWEST.

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...PLEASE CALL 1-800-253-7!091.

LAT...LON 3883 7947 3869 7930 3883 7893 3903 7917

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 Aug 2, 2:00 PM EDT, 2 hours 31 minutes earlier.

Area forecast discussion, Aug 2, 2:00 PM EDT, 2 hours 31 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
200 PM EDT WED AUG 2 2000

VORT MAX OVR ONTARIO WILL MOVE EWD INTO QUEBEC THU AND THU NIGHT WITH
THE TAIL END OF THE VORT MAX SWEEPING THRU NEW ENG. THE ASSOCD CDFNT
WILL PUSH THRU THE AREA THU EVE. AS THE SFC FNT BECOMES PARALLEL TO THE
UPR LVL FLO AND ENERGY LIFTS OUT OF NEW ENG...THE FRONT WILL SLOW ITS
SWD PROGRESS ON FRI BUT DRIER AIR WL SLOWLY PUSH INTO THE AREA.

MDLS DO SHOW A WEAK VORT MAX RIDING NWD INTO THE AREA OVRNGT. THE
NGM AND AVN SEEM TO LATCH ONTO THIS FEATURE AS A TRIGGER FOR SHRA/TSRA
AND THE RESULT IS LIKELY POPS FROM BOTH MDLS. WE BELIEVE THE MODEL
POPS ARE TOO HIGH. HOWEVER...WITH VORT MAX SHEARING NNE-WD THRU THE
AREA AND WITH VERY MOIST ATMS...THINK CHC POPS ARE WARRANTED.

ON THU...THERE IS A THREAT OF MORE ORGANIZED CONVECTION LATE IN THE
DAY & THU NIGHT AS FRONT APPROACHES THE MOIST UNSTABLE AIR MASS IN
PLACE OVR THE AREA. PLAN ON KEEPING HIGH CHC POPS WRN AREAS AND 40
POPS E OF THE BLUE RIDGE ON THU. WL HAVE CHC POPS EVERYWHERE THU
NIGHT. ON FRI...NOT SURE HOW QUICK THE FRONT WL PUSH SWD SO WL KEEP
SOME CLDNS IN THE FCST BUT LEAVE OUT MENTION OF ANY POPS AS DRIER
AIR SLOWLY FILTERS IN FROM THE N.

MRF SHOWING DRIER AIR PUSHING SWD INTO THE AREA SAT/SUN AS HIGH PRES
BUILDS INTO THE AREA SO THE WEEKEND LOOKS DRY AND WARM. NEXT CDFNT
SCHEDULED THRU HERE LATE MON WITH ANOTHER ROUND OF CONVECTION.

FCSTID = 15
DCA   72  88  73  85 /  30  40  40  20
BWI   70  88  71  85 /  30  40  40  20
MRB   68  87  67  85 /  30  50  40  10
IAD   69  88  68  85 /  30  40  40  20
CHO   71  88  70  86 /  30  40  40  20
HGR   67  86  67  84 /  30  50  40  10
NHK   72  88  73  85 /  30  40  40  20

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

END

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 4:40 PM EDTFlash Flood WarningLWXGrant, Hardy, Pendleton2 hr

Nearby

Flash Flood Warnings in West Virginia, 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.