Alert archive / Virginia / Flash Flood Warnings in 2011

Flash Flood Warning 72, NWS Blacksburg, VA

September 3, 2011Rockbridge County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Sep 3, 2011, 2:02 PM EDT for Rockbridge County, 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: Sep 3, 2011, 2:02 PM EDT (18:02 UTC)
Expired: Sep 3, 2011, 6:23 PM EDT
In force: 4 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

County Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 129 km from the middle of the area, began a volume at 18:05 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, 6.0 hours before the alert went out and 74 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: 1125 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 471 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 116 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.

442 
WGUS51 KRNK 031802
FFWRNK
VAC163-040000-
/O.NEW.KRNK.FF.W.0072.110903T1802Z-110904T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
202 PM EDT SAT SEP 3 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL ROCKBRIDGE COUNTY IN WEST CENTRAL VIRGINIA

* UNTIL 800 PM EDT.

* AT 156 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VESUVIUS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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 3780 7916 3779 7918 3780 7922 3782 7923
      3780 7925 3780 7929 3790 7928 3790 7919

$$

JH

1 follow-up statement

114 
WGUS71 KRNK 032223
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
623 PM EDT SAT SEP 3 2011

VAC163-032233-
/O.CAN.KRNK.FF.W.0072.000000T0000Z-110904T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ROCKBRIDGE VA-
623 PM EDT SAT SEP 3 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EASTERN ROCKBRIDGE
COUNTY...

FLOODING HAS ENDED OVER THE WARNED AREA...THUS THE FLASH FLOOD
WARNING HAS BEEN CANCELLED.

LAT...LON 3780 7916 3779 7918 3780 7922 3782 7923
      3780 7925 3780 7929 3790 7928 3790 7919

$$

AMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 2, 8:23 PM EDT	Severe Thunderstorm Warning	RNK	Grayson	19 min
Sep 2, 8:32 PM EDT	Special Weather Statement	RNK	Pulaski, City of Radford	58 min
Sep 3, 1:29 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Rockbridge, City of Buena Vista	61 min
Sep 3, 1:41 PM EDT	Special Weather Statement	RNK	Alleghany, Bath, Giles, City of Covington	64 min
Sep 3, 2:32 PM EDT	Special Weather Statement	RNK	Rockbridge	43 min
Sep 3, 2:50 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath	55 min
Sep 3, 3:00 PM EDT	Severe Thunderstorm Warning	RNK	Bath, Rockbridge	38 min
Sep 3, 3:23 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Botetourt, City of Covington	67 min
Sep 3, 3:37 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath	24 min
Sep 3, 3:45 PM EDT	Special Weather Statement	RNK	Tazewell	30 min
Sep 3, 3:55 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Botetourt, Craig	65 min
Sep 3, 4:08 PM EDT	Special Weather Statement	RNK	Wythe	52 min
Sep 3, 4:17 PM EDT	Special Weather Statement	RNK	Craig	43 min
Sep 3, 4:25 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt, Craig, Montgomery, Roanoke	65 min
Sep 3, 4:53 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt, Carroll, Floyd, Franklin, Montgomery, Pulaski and 4 more	67 min
Sep 3, 5:00 PM EDT	Severe Thunderstorm Warning	RNK	Wythe	60 min
Sep 3, 5:19 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Giles, Pulaski, Wythe	56 min
Sep 3, 5:27 PM EDT	Special Weather Statement	RNK	Smyth	33 min
Sep 3, 6:02 PM EDT	Special Weather Statement	RNK	Carroll, Floyd, Franklin, Wythe	43 min
Sep 3, 6:21 PM EDT	Flash Flood Warning	RNK	Wythe	3 hr

Nearby

Flash Flood Warnings in Virginia, 2011 Every flash flood warning in 2011

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.