Alert archive / Virginia / Flash Flood Warnings in 2014

Flash Flood Warning 13, NWS Blacksburg, VA

June 20, 2014Patrick County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Jun 20, 2014, 4:26 PM EDT for Patrick County, Virginia. It was in force for 2 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
Jun 20, 2014, 4:26 PM EDT (20:26 UTC)
Expired
Jun 20, 2014, 6:30 PM EDT
In force
2 hr
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

County Patrick County, VA

The radar

The Roanoke radar (KFCX), 52 km from the middle of the area, began a volume at 20:26 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, 8.4 hours before the alert went out and 79 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 2014-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 160 joules per kilogram.LCLLFCEL10008507005003002001001 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 2014-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.1939Sfc1 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
160 J/kg
Mixed-layer CIN
-109 J/kg
Mixed-layer LCL
1171 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
36 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.

990 
WGUS51 KRNK 202026
FFWRNK
VAC141-202230-
/O.NEW.KRNK.FF.W.0013.140620T2026Z-140620T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
426 PM EDT FRI JUN 20 2014

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN PATRICK COUNTY IN SOUTHWEST VIRGINIA...

* UNTIL 630 PM EDT
    
* AT 426 PM EDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  AND ARARAT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR ROAD CLOSURES...TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE AT 1...8 6 6...2 1 5...4 3 2 4. REPORTS
AND PICTURES CAN ALSO BE SHARED ON THE NATIONAL WEATHER SERVICE
BLACKSBURG FACEBOOK PAGE AND ON TWITTER.

&&

LAT...LON 3663 8049 3655 8044 3656 8058 3660 8058

$$

MBS
2 follow-up statements
568 
WGUS71 KRNK 202155
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
555 PM EDT FRI JUN 20 2014

VAC141-202230-
/O.CON.KRNK.FF.W.0013.000000T0000Z-140620T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PATRICK VA-
555 PM EDT FRI JUN 20 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM EDT FOR 
SOUTHWESTERN PATRICK COUNTY...

AT 551 PM EDT...DOPPLER RADAR INDICATED THAT THE THUNDERSTORMS THAT 
PRODUCED HEAVY RAIN THIS AFTERNOON HAVE MOVED AWAY TO THE SOUTH. 
HOWEVER...UP TO THREE INCHES OF RAIN FELL IN THE WARNED AREA. RUNOFF 
FROM THIS RAIN WILL ACCUMULATE IN AREA CREEKS AND STREAMS THIS 
EVENING...POSSIBLY PUSHING THEM OUT OF THEIR BANKS TO CAUSE FLASH 
FLOODING.
 
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE ARARAT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR VEHICLE
INTO AREAS WHERE THE WATER COVERS THE ROAD. THE WATER MAY BE TOO DEEP
TO ALLOW YOUR CAR TO CROSS SAFELY. TURN AROUND DONT DROWN. NEVER TRY
TO CROSS A FLOWING STREAM ON FOOT.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR ROAD CLOSURES...TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE AT 1...8 6 6...2 1 5...4 3 2 4. REPORTS
AND PICTURES CAN ALSO BE SHARED ON THE NATIONAL WEATHER SERVICE
BLACKSBURG FACEBOOK PAGE AND ON TWITTER.

&&

LAT...LON 3663 8049 3655 8044 3656 8058 3660 8058

$$

16
406 
WGUS71 KRNK 202223
FFSRNK

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
623 PM EDT FRI JUN 20 2014

VAC141-202232-
/O.EXP.KRNK.FF.W.0013.000000T0000Z-140620T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PATRICK VA-
623 PM EDT FRI JUN 20 2014

...THE FLASH FLOOD WARNING FOR 
SOUTHWESTERN PATRICK COUNTY WILL EXPIRE AT 630 PM EDT...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO 
POSE A THREAT. ADDITIONAL SHOWERS AND PERHAPS A THUNDERSTORM COULD 
OCCUR THIS EVENING BUT WIDESPREAD HEAVY RAIN IS NOT EXPECTED.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF FLOODING...
INCLUDING MUDSLIDES OR ROAD CLOSURES...TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE AT 1...8 6 6...2 1 5...4 3 2 4. REPORTS
AND PICTURES CAN ALSO BE SHARED ON THE NATIONAL WEATHER SERVICE
BLACKSBURG FACEBOOK PAGE AND ON TWITTER.

LAT...LON 3663 8049 3655 8044 3656 8058 3660 8058

$$

JH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 9:50 PM EDTSpecial Weather StatementRNKWythe55 min
Jun 20, 1:38 PM EDTSpecial Weather StatementRNKPittsylvania37 min
Jun 20, 2:01 PM EDTSpecial Weather StatementRNKPittsylvania29 min
Jun 20, 2:33 PM EDTSpecial Weather StatementRNKCity of Danville42 min
Jun 20, 2:53 PM EDTSpecial Weather StatementRNKHenry67 min
Jun 20, 2:59 PM EDTSpecial Weather StatementRNKBedford31 min
Jun 20, 3:01 PM EDTAreal Flood AdvisoryRNKPittsylvania, City of Danville119 min
Jun 20, 3:07 PM EDTSevere Thunderstorm WarningRNKBedford, Botetourt, Franklin38 min
Jun 20, 3:18 PM EDTSpecial Weather StatementRNKTazewell57 min
Jun 20, 3:28 PM EDTSevere Thunderstorm WarningRNKHenry, Patrick32 min
Jun 20, 3:38 PM EDTSevere Thunderstorm WarningRNKTazewell37 min
Jun 20, 3:48 PM EDTSevere Thunderstorm WarningRNKHenry, City of Martinsville42 min
Jun 20, 3:51 PM EDTSevere Thunderstorm WarningRNKBedford, Franklin39 min
Jun 20, 3:53 PM EDTSevere Thunderstorm WarningRNKCarroll, Patrick67 min
Jun 20, 4:11 PM EDTSpecial Weather StatementRNKPatrick49 min
Jun 20, 4:18 PM EDTSpecial Weather StatementRNKTazewell42 min
Jun 20, 4:21 PM EDTSpecial Weather StatementRNKAmherst, City of Buena Vista, City of Lynchburg39 min
Jun 20, 4:33 PM EDTSpecial Weather StatementRNKCity of Buena Vista42 min
Jun 20, 4:37 PM EDTSpecial Weather StatementRNKFranklin38 min
Jun 20, 4:42 PM EDTSpecial Weather StatementRNKMontgomery48 min
Jun 20, 5:19 PM EDTSpecial Weather StatementRNKCampbell, City of Lynchburg56 min
Jun 20, 5:33 PM EDTSevere Thunderstorm WarningRNKFloyd, Franklin, Montgomery, Roanoke57 min
Jun 20, 5:48 PM EDTSevere Thunderstorm WarningRNKAppomattox, Campbell, Charlotte, Halifax, City of Lynchburg57 min
Jun 20, 6:18 PM EDTSevere Thunderstorm WarningRNKBedford, Botetourt, Craig57 min
Jun 20, 6:43 PM EDTSevere Thunderstorm WarningRNKCampbell, Charlotte, Halifax, Pittsylvania62 min
Jun 20, 7:00 PM EDTSpecial Weather StatementRNKBedford45 min
Jun 20, 7:15 PM EDTSpecial Weather StatementRNKBotetourt60 min
Jun 20, 7:43 PM EDTSpecial Weather StatementRNKAmherst, Rockbridge, City of Buena Vista, City of Lexington, City of Lynchburg47 min
Jun 20, 7:51 PM EDTSpecial Weather StatementRNKCampbell, Charlotte, City of Lynchburg39 min

Nearby

Flash Flood Warnings in Virginia, 2014Every flash flood warning in 2014

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.