Alert archive / Virginia / Flash Flood Warnings in 2003

Flash Flood Warning 1, NWS Blacksburg, VA

March 20, 20036 counties in North Carolina; 7 counties in Virginia

NWS Blacksburg, VA issued this flash flood warning at Mar 20, 2003, 8:50 AM EST for 6 counties in North Carolina; 7 counties in Virginia. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Mar 20, 2003, 8:50 AM EST (13:50 UTC)
Expired
Mar 20, 2003, 12:30 PM EST
In force
4 hr
Issued by
NWS Blacksburg, VA
Area
Counties, with a storm outline in the text

Counties Caswell County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Wilkes County, NC, Yadkin County, NC, City of Danville, VA, City of Martinsville, VA, Franklin County, VA, Halifax County, VA, Henry County, VA, Patrick County, VA, Pittsylvania County, VA

The radar

The Roanoke radar (KFCX), 51 km from the middle of the area, began a volume at 13:50 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 1.8 hours before the alert went out and 62 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, Greensboro/Hi Pt, NC at 12:00Z on 2003-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2003-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 675 square meters per square second.1939587897Sfc1 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
5 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
461 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
675 m²/s²
0-3 km storm-relative helicity
829 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 KRNK 201352
FFWRNK
NCC033-157-169-171-193-197-VAC067-083-089-141-143-590-690-201730-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
850 AM EST THU MAR 20 2003

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CASWELL COUNTY IN NORTH CENTRAL NORTH CAROLINA
  ROCKINGHAM COUNTY IN NORTH CENTRAL NORTH CAROLINA
  STOKES COUNTY IN NORTH CENTRAL NORTH CAROLINA
  SURRY COUNTY IN NORTH CENTRAL NORTH CAROLINA
  WILKES COUNTY IN NORTHWEST NORTH CAROLINA
  YADKIN COUNTY IN NORTHWEST NORTH CAROLINA
  HALIFAX COUNTY IN SOUTH CENTRAL VIRGINIA
  HENRY COUNTY IN SOUTH CENTRAL VIRGINIA...INCLUDING MARTINSVILLE
  PITTSYLVANIA COUNTY IN SOUTH CENTRAL VIRGINIA...INCLUDING DANVILLE
  PATRICK COUNTY IN SOUTHWEST VIRGINIA
  FRANKLIN COUNTY IN WEST CENTRAL VIRGINIA

* UNTIL 1230 PM EST

* AT 850 AM EST...LAW ENFORCEMENT AND EMERGENCY MANAGEMENT 
 REPORTED NUMEROUS STREAMS AND CREEKS AT BANKFULL OR FLOODING ACROSS 
 THE WARNED AREA.  THE SMITH RIVER WHICH WINDS THROUGH MARTINSVILLE 
 WAS AT BANKFULL AND IS EXPECTED TO FLOOD THIS MORNING.  SEVERAL 
 ROADS THROUGHOUT THE WARNED AREA ARE ALSO FLOODED...WITH SOME 
 IMPASSIBLE.  WITH MODERATE TO HEAVY RAIN EXPECTED TO CONTINUE 
 THROUGH MIDDAY...OTHER STREAMS...CREEKS AND ROADS WILL LIKELY 
 BECOME FLOODED.  AREAS OF SERIOUS FLASH FLOODING MAY DEVELOP BY 
 EARLY AFTERNOON.

* PLEASE SEE WBCFLWRNK FOR FORECASTED CRESTS ALONG THE DAN RIVER AT 
 DANVILLE...PACES...AND SOUTH BOSTON.

<<CALL TO ACTION>>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.

RELAY REPORTS OF FLOODING TO THE NATIONAL WEATHER SERVICE IN
BLACKSBURG BY CALLING TOLL FREE...1...8 6 6...2 1 5...4 3 2 4.



LAT...LON 3599 8132 3611 8154 3634 8137 3636 8102
          3655 8091 3656 8062 3712 8013 3722 7978
          3703 7957 3713 7934 3701 7875 3662 7857
          3623 7916 3625 8022

$$

08
2 follow-up statements
000 
WGUS71 KRNK 201545
FFSRNK
NCC033-157-169-171-193-197-VAC031-037-067-083-089-141-143-590-690-
201730-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1045 AM EST THU MAR 20 2003

...FLASH FLOOD WARNING CONTINUES UNTIL 1230 PM EST FOR 
CASWELL...ROCKINGHAM...STOKES...SURRY...WILKES AND YADKIN COUNTIES 
IN NORTH CAROLINA AND HALIFAX...HENRY...PITTSYLVANIA...PATRICK AND 
FRANKLIN COUNTIES IN VIRGINIA...

...FLASH FLOOD WARNING CONTINUES UNTIL 1245 PM FOR CAMPBELL AND 
CHARLOTTE COUNTIES IN VIRGINIA...

WIDESPREAD MODERATE RAIN CONTINUES ACROSS THE WARNED AREAS....WITH 
EMBEDDED AREAS OF HEAVY RAIN. THE RAIN IS EXPECTED TO GRADUALLY 
DIMINISH ACROSS THE WARNED AREA FROM SOUTHWEST TO NORTHEAST THIS 
AFTERNOON. ADDITIONAL RAINFALL AMOUNTS SHOULD AVERAGE FROM ONE TO 
THREE TENTHS OF AN INCH PER HOUR INTO THE EARLY 
AFTERNOON...RESULTING IN CONTINUED SIGNIFICANT FLOODING OF MANY 
SMALL CREEKS AND STREAMS. ISOLATED RAINFALL AMOUNTS IN EXCESS OF AN 
INCH IN TWO HOURS OR LESS COULD RESULT IN FLASH FLOODING. 

THIS IS A DANGEROUS FLOODING SITUATION. PLEASE DO NOT DRIVE INTO 
AREAS WHERE MOVING WATER COVERS THE ROAD.

RELAY YOUR REPORTS OF FLOODING TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1...8 6 6...2 1 5...4 3 2 4.

$$

MTE
000 
WGUS71 KRNK 201719
FFSRNK
NCC033-157-169-171-193-197-VAC031-037-067-083-089-141-143-590-690-
201745-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
1220 PM EST THU MAR 20 2003

...FLASH FLOOD WARNINGS IN EFFECT UNTIL 1230 PM AND 1245 PM WILL BE 
ALLOWED TO EXPIRE...
...SIGNIFICANT FLOODING OF STREAMS AND CREEKS CONTINUES...

THE THREAT FOR HEAVY RAINFALL AND FLASH FLOODING ACROSS THE WARNED 
AREA HAS ENDED. AS A RESULT...THE FLASH FLOOD WARNINGS ISSUED THIS 
MORNING WILL BE ALLOWED TO EXPIRE.

LIGHT TO MODERATE RAINFALL IS EXPECTED TO END FROM SOUTHWEST TO 
NORTHEAST ACROSS THE WARNED AREA THIS AFTERNOON. AN ADDITIONAL ONE 
TO THREE TENTHS OF AN INCH OF RAIN COULD OCCUR BEFORE THE RAIN ENDS. 
SIGNIFICANT FLOODING OF MANY CREEKS AND STREAMS IS ONGOING IN MUCH 
OF THE WARNED AREA. CREEKS AND SMALL STREAMS ARE EXPECTED TO BEGIN 
RECEDING BY MID AFTERNOON.

HOWEVER...WATER LEVELS ON LARGER STREAMS AND RIVERS ARE EXPECTED TO 
CONTINUE TO RISE THIS AFTERNOON. PLEASE SEE LATEST RIVER FLOOD 
WARNINGS ISSUED UNDER THE WBCFLWRNK HEADER.

DO NOT DRIVE ACROSS A ROAD IF WATER IS MOVING ACROSS IT.

RELAY YOUR REPORTS OF FLOODING TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1...8 6 6...2 1 5...4 3 2 4.

$$

MTE

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 20, 8:55 AM ESTFlash Flood WarningRNKCampbell, Charlotte4 hr

Nearby

Flash Flood Warnings in Virginia, 2003Flash Flood Warnings in North Carolina, 2003Every flash flood warning in 2003

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.