Alert archive / Virginia / Flash Flood Watches in 2021

Flash Flood Watch 5, NWS Blacksburg, VA

July 1, 20216 counties in North Carolina; 23 counties in Virginia; 4 counties in West Virginia

NWS Blacksburg, VA issued this flash flood watch at Jul 1, 2021, 10:00 AM EDT for 6 counties in North Carolina; 23 counties in Virginia; 4 counties in West Virginia. It took effect at Jul 1, 2021, 12:00 PM EDT. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued
Jul 1, 2021, 10:00 AM EDT (14:00 UTC)
In effect from
Jul 1, 2021, 12:00 PM EDT
Expired
Jul 2, 2021, 6:40 AM EDT
In force
19 hr
Issued by
NWS Blacksburg, VA
Flood severity
None
All 33 counties

Alleghany County, NC, Ashe County, NC, Surry County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Alleghany County, VA, Bath County, VA, Bland County, VA, Botetourt County, VA, Carroll County, VA, City of Buena Vista, VA, City of Covington, VA, City of Galax, VA, City of Lexington, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, Craig County, VA, Floyd County, VA, Giles County, VA, Grayson County, VA, Montgomery County, VA, Pulaski County, VA, Roanoke County, VA, Rockbridge County, VA, Smyth County, VA, Tazewell County, VA, Wythe County, VA, Greenbrier County, WV, Mercer County, WV, Monroe County, WV, Summers County, WV

The radar

The Roanoke radar (KFCX), 30 km from the middle of the area, began a volume at 14:01 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, 2.0 hours before the alert went out and 95 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 12:00Z on 2021-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 312 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, Roanoke, VA at 12:00Z on 2021-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
312 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
989 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
23 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

015 
WGUS61 KRNK 011400
FFARNK

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Blacksburg VA
1000 AM EDT Thu Jul 1 2021

VAZ007-009-WVZ042>044-507-508-012200-
/O.NEW.KRNK.FF.A.0005.210701T1600Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tazewell-Smyth-Mercer-Summers-Monroe-Eastern Greenbrier-Western
Greenbrier-
Including the cities of Duo, Hix, Bluefield, Alderson, Tazewell, 
Union, Flat Top, White Sulphur Springs, Quinwood, Marion, Hinton, 
Lewisburg, and Rainelle
1000 AM EDT Thu Jul 1 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

The National Weather Service in Blacksburg has issued a

* Flash Flood Watch for portions of southwest Virginia and southeast 
  West Virginia, including the following areas, in southwest 
  Virginia, Smyth and Tazewell. In southeast West Virginia, Eastern 
  Greenbrier, Mercer, Monroe, Summers and Western Greenbrier.

* Through Friday morning.

* Excessive moisture will continue to build this afternoon and 
  evening ahead of an approaching cold front. Showers and 
  thunderstorms will have the potential of producing prolonged 
  periods of heavy rainfall, which may lead to localized flash 
  flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

16
6 follow-up statements
650 
WGUS61 KRNK 011904
FFARNK

Flood Watch
National Weather Service Blacksburg VA
304 PM EDT Thu Jul 1 2021

VAZ007-009-WVZ042>044-507-508-020315-
/O.CON.KRNK.FF.A.0005.000000T0000Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tazewell-Smyth-Mercer-Summers-Monroe-Eastern Greenbrier-Western
Greenbrier-
Including the cities of Duo, Hix, Bluefield, Alderson, Tazewell, 
Union, Flat Top, White Sulphur Springs, Quinwood, Marion, Hinton, 
Lewisburg, and Rainelle
304 PM EDT Thu Jul 1 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* Portions of southwest Virginia and southeast West Virginia, 
  including the following areas, in southwest Virginia, Smyth and 
  Tazewell. In southeast West Virginia, Eastern Greenbrier, Mercer, 
  Monroe, Summers and Western Greenbrier.

* Through Friday morning.

* Excessive moisture will continue to build into the evening ahead 
  of an approaching cold front. Showers and thunderstorms will have 
  the potential of producing prolonged periods of heavy rainfall, 
  which may lead to localized flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

16
844 
WGUS61 KRNK 012021
FFARNK

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Blacksburg VA
421 PM EDT Thu Jul 1 2021

.Numerous showers and thunderstorms will move across southwest 
Virginia, southeast West Virginia and northwest North Carolina this 
evening and overnight ahead of an approaching cold front.

NCZ001>003-018>020-VAZ010>020-022>024-020430-
/O.EXA.KRNK.FF.A.0005.000000T0000Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ashe-Alleghany NC-Surry-Watauga-Wilkes-Yadkin-Bland-Giles-Wythe-
Pulaski-Montgomery-Grayson-Carroll-Floyd-Craig-Alleghany VA-Bath-
Roanoke-Botetourt-Rockbridge-
Including the cities of Roanoke, Wilkesboro, Sparta, Pulaski, 
Covington, Independence, Fincastle, Buena Vista, Floyd, Hot Springs, 
Clifton Forge, Wytheville, Yadkinville, Whitetop, Volney, 
Pearisburg, Blacksburg, West Jefferson, Lexington, Radford, Boone, 
New Castle, Dobson, Galax, Salem, Bland, and Troutdale
421 PM EDT Thu Jul 1 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

The National Weather Service in Blacksburg has expanded the

* Flash Flood Watch to include portions of North Carolina and 
  Virginia, including the following areas, in North Carolina, 
  Alleghany NC, Ashe, Surry, Watauga, Wilkes and Yadkin. In 
  Virginia, Alleghany VA, Bath, Bland, Botetourt, Carroll, Craig, 
  Floyd, Giles, Grayson, Montgomery, Pulaski, Roanoke, Rockbridge 
  and Wythe.

* Through Friday morning.

* Torrential rainfall rates may produce flash flooding. Some 
  locations may have repeated rounds of very heavy rainfall.

* Roads and underpasses may quickly become covered with fast flowing 
  water and impassible. Streams and creeks may rapidly rise out of 
  their banks leading to flooding of roads, buildings and nearby 
  areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

VAZ007-009-WVZ042>044-507-508-020430-
/O.CON.KRNK.FF.A.0005.000000T0000Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tazewell-Smyth-Mercer-Summers-Monroe-Eastern Greenbrier-Western
Greenbrier-
Including the cities of Duo, Hix, Bluefield, Alderson, Tazewell, 
Union, Flat Top, White Sulphur Springs, Quinwood, Marion, Hinton, 
Lewisburg, and Rainelle
421 PM EDT Thu Jul 1 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* Portions of southwest Virginia and southeast West Virginia, 
  including the following areas, in southwest Virginia, Smyth and 
  Tazewell. In southeast West Virginia, Eastern Greenbrier, Mercer, 
  Monroe, Summers and Western Greenbrier.

* Through Friday morning.

* Torrential rainfall rates may produce flash flooding. Some 
  locations may have repeated rounds of very heavy rainfall.

* Roads and underpasses may quickly become covered with fast flowing 
  water and impassible. Streams and creeks may rapidly rise out of 
  their banks leading to flooding of roads, buildings and nearby 
  areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

AS
929 
WGUS61 KRNK 020218
FFARNK

Flood Watch
National Weather Service Blacksburg VA
1018 PM EDT Thu Jul 1 2021

VAZ007-009-WVZ042>044-507-508-021200-
/O.CON.KRNK.FF.A.0005.000000T0000Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tazewell-Smyth-Mercer-Summers-Monroe-Eastern Greenbrier-Western
Greenbrier-
Including the cities of Duo, Hix, Bluefield, Alderson, Tazewell, 
Union, Flat Top, White Sulphur Springs, Quinwood, Marion, Hinton, 
Lewisburg, and Rainelle
1018 PM EDT Thu Jul 1 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 AM EDT FRIDAY...

The Flash Flood Watch continues for

* Portions of southwest Virginia and southeast West Virginia, 
  including the following areas, in southwest Virginia, Smyth and 
  Tazewell. In southeast West Virginia, Eastern Greenbrier, Mercer, 
  Monroe, Summers and Western Greenbrier.

* Until 8 AM EDT Friday.

* Several rounds of showers and thunderstorms are expected tonight.
  Some of the storms will produce heavy rain which may result in
  localized flooding. 

* Roads and underpasses may quickly become covered with fast flowing 
  water and impassible. Streams and creeks may rapidly rise out of 
  their banks leading to flooding of roads, buildings and nearby 
  areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

NCZ001>003-018>020-VAZ010>020-022>024-021200-
/O.CON.KRNK.FF.A.0005.000000T0000Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ashe-Alleghany NC-Surry-Watauga-Wilkes-Yadkin-Bland-Giles-Wythe-
Pulaski-Montgomery-Grayson-Carroll-Floyd-Craig-Alleghany VA-Bath-
Roanoke-Botetourt-Rockbridge-
Including the cities of Roanoke, Wilkesboro, Sparta, Pulaski, 
Covington, Independence, Fincastle, Buena Vista, Floyd, Hot Springs, 
Clifton Forge, Wytheville, Yadkinville, Whitetop, Volney, 
Pearisburg, Blacksburg, West Jefferson, Lexington, Radford, Boone, 
New Castle, Dobson, Galax, Salem, Bland, and Troutdale
1018 PM EDT Thu Jul 1 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 AM EDT FRIDAY...

The Flash Flood Watch continues for

* Portions of North Carolina and Virginia, including the following 
  areas, in North Carolina, Alleghany NC, Ashe, Surry, Watauga, 
  Wilkes and Yadkin. In Virginia, Alleghany VA, Bath, Bland, 
  Botetourt, Carroll, Craig, Floyd, Giles, Grayson, Montgomery, 
  Pulaski, Roanoke, Rockbridge and Wythe.

* Until 8 AM EDT Friday.

* Several rounds of showers and a few thunderstorms are expected 
  overnight. This rain will fall on already soaked ground and may 
  result in flash flooding.

* Roads and underpasses may quickly become covered with fast flowing 
  water and impassible. Streams and creeks may rapidly rise out of 
  their banks leading to flooding of roads, buildings and nearby 
  areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

AS
517 
WGUS61 KRNK 020611
FFARNK

Flood Watch
National Weather Service Blacksburg VA
211 AM EDT Fri Jul 2 2021

VAZ011-018>020-023-024-WVZ042>044-507-508-020715-
/O.CAN.KRNK.FF.A.0005.000000T0000Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Giles-Craig-Alleghany VA-Bath-Botetourt-Rockbridge-Mercer-Summers-
Monroe-Eastern Greenbrier-Western Greenbrier-
Including the cities of New Castle, Quinwood, Fincastle, Buena 
Vista, Alderson, Hix, Bluefield, Duo, Pearisburg, Lexington, 
Lewisburg, Union, Covington, Flat Top, Hot Springs, White Sulphur 
Springs, Hinton, Clifton Forge, and Rainelle
211 AM EDT Fri Jul 2 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of Virginia and southeast West 
Virginia, including the following areas, in Virginia, Alleghany VA, 
Bath, Botetourt, Craig, Giles and Rockbridge. In southeast West 
Virginia, Eastern Greenbrier, Mercer, Monroe, Summers and Western 
Greenbrier has been cancelled.

The Flash Flood Watch is cancelled. Excessive rainfall rates are not 
expected this morning, so the threat of flash flooding has ended.

$$

VAZ007-009-021200-
/O.CON.KRNK.FF.A.0005.000000T0000Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tazewell-Smyth-
Including the cities of Marion and Tazewell
211 AM EDT Fri Jul 2 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING...

The Flash Flood Watch continues for

* A portion of southwest Virginia, including the following areas, 
  Smyth and Tazewell.

* Until 8 AM EDT this morning.

* Periods of moderate to at times heavy rain will persist early this 
  morning. This could result in isolated flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

NCZ001>003-018>020-VAZ010-012>017-022-021200-
/O.CON.KRNK.FF.A.0005.000000T0000Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ashe-Alleghany NC-Surry-Watauga-Wilkes-Yadkin-Bland-Wythe-Pulaski-
Montgomery-Grayson-Carroll-Floyd-Roanoke-
Including the cities of Roanoke, Wilkesboro, Yadkinville, Whitetop, 
Sparta, Floyd, Volney, Blacksburg, West Jefferson, Galax, Pulaski, 
Wytheville, Dobson, Salem, Radford, Boone, Bland, Independence, and 
Troutdale
211 AM EDT Fri Jul 2 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING...

The Flash Flood Watch continues for

* Portions of North Carolina and Virginia, including the following 
  areas, in North Carolina, Alleghany NC, Ashe, Surry, Watauga, 
  Wilkes and Yadkin. In Virginia, Bland, Carroll, Floyd, Grayson, 
  Montgomery, Pulaski, Roanoke and Wythe.

* Until 8 AM EDT this morning.

* Periods of moderate to at times heavy rain will persist early this 
  morning. This could result in isolated flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

WP
798 
WGUS61 KRNK 020951
FFARNK

Flood Watch
National Weather Service Blacksburg VA
551 AM EDT Fri Jul 2 2021

NCZ001-002-018-VAZ007-009-010-012>017-022-021100-
/O.CAN.KRNK.FF.A.0005.000000T0000Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ashe-Alleghany NC-Watauga-Tazewell-Smyth-Bland-Wythe-Pulaski-
Montgomery-Grayson-Carroll-Floyd-Roanoke-
Including the cities of Roanoke, Wytheville, Whitetop, Galax, 
Sparta, Volney, Blacksburg, West Jefferson, Tazewell, Salem, 
Pulaski, Floyd, Marion, Radford, Boone, Bland, Independence, and 
Troutdale
551 AM EDT Fri Jul 2 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of northwest North Carolina and 
Virginia, including the following areas, in northwest North 
Carolina, Alleghany NC, Ashe and Watauga. In Virginia, Bland, 
Carroll, Floyd, Grayson, Montgomery, Pulaski, Roanoke, Smyth, 
Tazewell and Wythe has been cancelled.

The Flood Watch is cancelled. Flooding is no longer expected to pose 
a threat. Please continue to heed remaining road closures.

$$

NCZ003-019-020-021200-
/O.CON.KRNK.FF.A.0005.000000T0000Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Surry-Wilkes-Yadkin-
Including the cities of Wilkesboro, Dobson, and Yadkinville
551 AM EDT Fri Jul 2 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING...

The Flash Flood Watch continues for

* Portions of north central North Carolina and northwest North 
  Carolina, including the following areas, in north central North 
  Carolina, Surry. In northwest North Carolina, Wilkes and Yadkin.

* Until 8 AM EDT this morning.

* Periods of moderate to at times heavy rain will persist early this 
  morning. This could result in isolated flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

WP
980 
WGUS61 KRNK 021040
FFARNK

Flood Watch
National Weather Service Blacksburg VA
640 AM EDT Fri Jul 2 2021

NCZ003-019-020-021145-
/O.CAN.KRNK.FF.A.0005.000000T0000Z-210702T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Surry-Wilkes-Yadkin-
Including the cities of Wilkesboro, Dobson, and Yadkinville
640 AM EDT Fri Jul 2 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of north central North Carolina 
and northwest North Carolina, including the following areas, in 
north central North Carolina, Surry. In northwest North Carolina, 
Wilkes and Yadkin has been cancelled.

The Flood Watch is cancelled. Flooding is no longer expected to pose 
a threat. Please continue to heed remaining road closures.

$$

WP

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 12:36 PM EDTAreal Flood AdvisoryRNKAlleghany, Ashe, Surry, Watauga, Wilkes97 min
Jul 1, 12:54 PM EDTFlash Flood WarningRNKAshe, Watauga, Wilkes4 hr
Jul 1, 3:22 PM EDTSpecial Weather StatementRNKAshe23 min
Jul 1, 5:29 PM EDTAreal Flood AdvisoryRNKAlleghany, Ashe, Watauga3 hr
Jun 30, 8:41 PM EDTSpecial Weather StatementRNKCity of Buena Vista34 min
Jun 30, 9:32 PM EDTSpecial Weather StatementRNKBedford28 min
Jul 1, 11:58 AM EDTSpecial Weather StatementRNKBath32 min
Jul 1, 1:43 PM EDTSpecial Weather StatementRNKFloyd32 min
Jul 1, 2:11 PM EDTSpecial Weather StatementRNKFranklin34 min
Jul 1, 2:39 PM EDTSpecial Weather StatementRNKAppomattox36 min
Jul 1, 2:46 PM EDTSpecial Weather StatementRNKBedford29 min
Jul 1, 2:48 PM EDTSpecial Weather StatementRNKMontgomery, Roanoke27 min
Jul 1, 3:08 PM EDTSpecial Weather StatementRNKBuckingham37 min
Jul 1, 3:29 PM EDTSpecial Weather StatementRNKAppomattox31 min
Jul 1, 3:45 PM EDTFlash Flood WarningRNKMontgomery6 hr
Jul 1, 3:48 PM EDTSpecial Weather StatementRNKCharlotte42 min
Jul 1, 4:13 PM EDTSpecial Weather StatementRNKPittsylvania47 min
Jul 1, 4:39 PM EDTSpecial Weather StatementRNKCharlotte21 min
Jul 1, 4:46 PM EDTSpecial Weather StatementRNKCraig44 min
Jul 1, 4:48 PM EDTSpecial Weather StatementRNKSmyth42 min
Jul 1, 5:06 PM EDTSpecial Weather StatementRNKCharlotte39 min
Jul 1, 5:10 PM EDTSpecial Weather StatementRNKFranklin35 min
Jul 1, 5:47 PM EDTAreal Flood AdvisoryRNKCampbell, Charlotte, Halifax6 hr
Jul 1, 5:57 PM EDTSpecial Weather StatementRNKFranklin33 min
Jul 1, 6:09 PM EDTSpecial Weather StatementRNKPittsylvania36 min
Jul 1, 6:21 PM EDTAreal Flood AdvisoryRNKFranklin63 min
Jul 1, 6:48 PM EDTSpecial Weather StatementRNKHalifax42 min
Jul 1, 7:24 PM EDTFlash Flood WarningRNKFranklin2 hr
Jul 1, 11:57 AM EDTSpecial Weather StatementRNKGreenbrier33 min
Jul 1, 12:20 PM EDTSevere Thunderstorm WarningRNKGreenbrier, Summers55 min

Nearby

Flash Flood Watches in Virginia, 2021Flash Flood Watches in North Carolina, 2021Flash Flood Watches in West Virginia, 2021Every flash flood watch in 2021

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.