Alert archive / Virginia / Flash Flood Warnings in 2001

Flash Flood Warning 7, NWS Blacksburg, VA

May 19, 2001Halifax County, Virginia

NWS Blacksburg, VA issued this flash flood warning at May 19, 2001, 5:52 PM EDT for Halifax County, Virginia. It was in force for 113 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: May 19, 2001, 5:52 PM EDT (21:52 UTC)
Expired: May 19, 2001, 7:45 PM EDT
In force: 113 min
Issued by: NWS Blacksburg, VA
Area: Whole counties

County Halifax County, VA

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 9.9 hours before the alert went out and 69 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: 33 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 978 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 33 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 192154
FFWRNK
VAC083-192345-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
552 PM EDT SAT MAY 19 2001

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HALIFAX COUNTY IN SOUTH CENTRAL VIRGINIA...

* UNTIL 745 PM EDT.

* AT 550 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  SEVERAL STRONG TO SEVERE THUNDERSTORMS PRODUCING HEAVY RAINFALL    
  AND MERGING OVER CENTRAL HALIFAX COUNTY.

LOCATIONS THREATENED BY HEAVY RAIN THROUGH 745 PM EDT INCLUDE        
  HALIFAX...
  SOUTH BOSTON...

SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE
WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH 
FLOODING IN HALIFAX AND ESPECIALLY SOUTH BOSTON.

<<CALL TO ACTION>>EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH
FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS...STREETS AND 
UNDERPASSES.  DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER 
COVERS THE ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE 
ABANDONED.

.END
$$

02

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 8:12 PM EDT	Severe Thunderstorm Warning	RNK	Halifax	33 min
May 19, 3:54 PM EDT	Flash Flood Warning	RNK	Giles	3 hr
May 19, 4:21 PM EDT	Severe Thunderstorm Warning	RNK	Campbell	39 min
May 19, 4:28 PM EDT	Severe Thunderstorm Warning	RNK	Floyd, Pulaski	47 min
May 19, 4:41 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania	49 min
May 19, 5:00 PM EDT	Severe Thunderstorm Warning	RNK	Giles	30 min
May 19, 5:27 PM EDT	Severe Thunderstorm Warning	RNK	Pittsylvania, City of Danville	48 min
May 19, 5:30 PM EDT	Severe Thunderstorm Warning	RNK	Halifax	45 min
May 19, 5:42 PM EDT	Severe Thunderstorm Warning	RNK	Franklin	33 min
May 19, 6:07 PM EDT	Severe Thunderstorm Warning	RNK	Henry, City of Martinsville	38 min
May 19, 6:41 PM EDT	Flash Flood Warning	RNK	Henry, City of Martinsville	2 hr

Nearby

Flash Flood Warnings in Virginia, 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.