Alert archive / Virginia / Flash Flood Warnings in 2008

Flash Flood Warning 13, NWS Blacksburg, VA

May 9, 2008Henry County, City of Martinsville, Virginia

NWS Blacksburg, VA issued this flash flood warning at May 9, 2008, 3:55 AM EDT for Henry County, City of Martinsville, Virginia. It was in force for 6 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
May 9, 2008, 3:55 AM EDT (07:55 UTC)
Expired
May 9, 2008, 10:00 AM EDT
In force
6 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

Counties City of Martinsville, VA, Henry County, VA

The radar

The Roanoke radar (KFCX), 45 km from the middle of the area, began a volume at 07:54 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 00:00Z, 7.9 hours before the alert went out and 64 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 00:00Z on 2008-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 196 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 00:00Z on 2008-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.19395878Sfc1 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
196 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1306 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
288 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KRNK 090758
FFWRNK
VAC089-690-091400-
/O.NEW.KRNK.FF.W.0013.080509T0755Z-080509T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
355 AM EDT FRI MAY 9 2008

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CITY OF MARTINSVILLE IN SOUTH CENTRAL VIRGINIA
  HENRY COUNTY IN SOUTH CENTRAL VIRGINIA

* UNTIL 1000 AM EDT.

* AT 354 AM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH   
FLOODING FROM OVERNIGHT THUNDERSTORMS OVER THE WARNED AREA. LAW 
ENFORCEMENT OFFICIALS REPORTED SAM LYONS TRAIL ROAD WAS WASHED OUT 
AND SPRUCE STREET AND OLD LIBERTY STREET CLOSED DUE TO HIGH WATER 
FROM SMALL CREEK FLOODING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PHILPOTT
  DAM...VILLA HEIGHTS...STANLEYTOWN...SANVILLE...MARTINSVILLE CITY...
  LEATHERWOOD...FIGSBORO...FIELDALE...COLLINSVILLE...CHATMOSS AND
  BASSETT

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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. MOVE TO HIGHER GROUND.

PLEASE RELAY ANY REPORTS OF FLOODING INCLUDING MUDSLIDES...OR ROAD
CLOSURES TO THE NATIONAL WEATHER SERVICE IN BLACKSBURG BY CALLING
TOLL FREE...1...8 6 6...2 1 5...4 3 2 4. DELAYED REPORTS ARE WELCOME.

LAT...LON 3674 7966 3660 7981 3655 8002 3677 8010
      3679 8006 3679 8003 3680 8002 3683 7999
TIME...MOT...LOC 0755Z 180DEG 0KT 3667 7988

$$

RCS

The office that day

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

IssuedProductOfficeCountiesLasted
May 8, 8:03 PM EDTTornado WarningRNKCarroll, Floyd, Patrick42 min
May 8, 8:07 PM EDTSevere Thunderstorm WarningRNKCraig30 min
May 8, 8:20 PM EDTTornado WarningRNKPatrick40 min
May 8, 8:44 PM EDTTornado WarningRNKBedford, Campbell, Franklin, Pittsylvania46 min
May 8, 8:45 PM EDTTornado WarningRNKFranklin, Henry, Patrick30 min
May 8, 9:02 PM EDTSevere Thunderstorm WarningRNKAmherst, Bedford, Botetourt, Roanoke, Rockbridge, City of Buena Vista and 2 more58 min
May 8, 9:16 PM EDTTornado WarningRNKCampbell, Charlotte, Halifax, Pittsylvania59 min
May 8, 9:25 PM EDTTornado WarningRNKFranklin, Henry, Pittsylvania50 min
May 8, 9:45 PM EDTTornado WarningRNKHenry, Patrick, City of Martinsville45 min
May 8, 9:48 PM EDTSevere Thunderstorm WarningRNKPatrick57 min
May 8, 9:56 PM EDTSevere Thunderstorm WarningRNKAmherst23 min
May 8, 10:14 PM EDTSevere Thunderstorm WarningRNKPittsylvania61 min
May 8, 10:15 PM EDTFlash Flood WarningRNKHenry, City of Martinsville6 hr
May 8, 10:22 PM EDTSevere Thunderstorm WarningRNKHenry53 min
May 8, 10:30 PM EDTSevere Thunderstorm WarningRNKHenry, City of Martinsville23 min
May 8, 10:42 PM EDTFlash Flood WarningRNKCampbell, Pittsylvania6 hr
May 8, 11:05 PM EDTSevere Thunderstorm WarningRNKCampbell, Charlotte, Halifax55 min
May 8, 11:15 PM EDTSevere Thunderstorm WarningRNKCharlotte, Halifax, Pittsylvania90 min
May 9, 12:22 AM EDTFlash Flood WarningRNKFranklin, Henry, Pittsylvania6 hr
May 9, 12:39 AM EDTFlash Flood WarningRNKAppomattox, Campbell6 hr
May 9, 12:50 AM EDTFlash Flood WatchRNKAmherst, Appomattox, Bedford, Buckingham, Campbell, Charlotte and 8 more4 hr
May 9, 1:14 AM EDTFlash Flood WarningRNKHenry, Patrick6 hr
May 9, 1:54 AM EDTSevere Thunderstorm WarningRNKCharlotte, Halifax61 min
May 9, 2:00 AM EDTFlash Flood WarningRNKHenry, Pittsylvania, City of Danville6 hr
May 9, 5:15 AM EDTAreal Flood WarningRNKCampbell, Pittsylvania5 hr
May 9, 6:09 AM EDTAreal Flood WarningRNKFranklin, Henry, Pittsylvania4 hr
May 9, 6:15 AM EDTAreal Flood WarningRNKAppomattox, Campbell4 hr
May 9, 6:45 AM EDTAreal Flood WarningRNKHenry, Patrick6 hr
May 9, 7:10 AM EDTFlash Flood WarningRNKHenry, Pittsylvania, City of Danville6 hr
May 9, 10:04 AM EDTRiver Flood WarningRNKPittsylvania, City of Danville26 hr
May 9, 10:04 AM EDTRiver Flood WarningRNKHalifax36 hr
May 9, 10:04 AM EDTRiver Flood WarningRNKHalifax54 hr
May 9, 6:14 PM EDTRiver Flood WarningRNKCharlotte, Halifax10 hr

Nearby

Flash Flood Warnings in Virginia, 2008Every flash flood warning in 2008

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.