Alert archive / North Carolina / Flash Flood Warnings in 2018

Flash Flood Warning 49, NWS Blacksburg, VA

July 30, 2018Carroll County, Henry County, Patrick County, Virginia; 4 counties in North Carolina

NWS Blacksburg, VA issued this flash flood warning at Jul 30, 2018, 10:38 PM EDT for Carroll County, Henry County, Patrick County, Virginia; 4 counties in North Carolina. It was in force for 6 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 30, 2018, 10:38 PM EDT (02:38 UTC)
Expired: Jul 31, 2018, 4:30 AM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

Counties Alleghany County, NC, Stokes County, NC, Surry County, NC, Wilkes County, NC, Carroll County, VA, Henry County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 71 km from the middle of the area, began a volume at 02:41 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.

What was reported inside it

Time	Report	Where	Remark
Jul 31, 1:00 AM EDT	FLASH FLOOD	2 Wsw Traphill, NC	EAST PRONG ROARING RIVER FLOODING TWIN LOCUST AND GRISSEL TAIL ROAD. 5 TO 6 FEET OF WATER FLOWING OVER THE ROAD.
Jul 31, 1:00 AM EDT	FLASH FLOOD	3 S Traphill, NC	LITTLE SANDY CREEK FLOODING SANDY CREEK ROAD.
Jul 31, 1:04 AM EDT	FLASH FLOOD	5 Wsw Bassett, VA	BLACKBERRY CREEK FLOODING ROUTE 698.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 2.6 hours before the alert went out and 87 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: 1556 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 825 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -1.2

Open this sounding in Storm Lab

The text

As transmitted.

215 
WGUS51 KRNK 310238
FFWRNK
NCC005-169-171-193-VAC035-089-141-310830-
/O.NEW.KRNK.FF.W.0049.180731T0238Z-180731T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service BLACKSBURG VA
1038 PM EDT MON JUL 30 2018

The National Weather Service in BLACKSBURG has issued a

* Flash Flood Warning for...
  Southeastern Alleghany County in northwestern North Carolina...
  Northern Surry County in northwestern North Carolina...
  Wilkes County in northwestern North Carolina...
  Northwestern Stokes County in north central North Carolina...
  Southeastern Carroll County in southwestern Virginia...
  Northwestern Henry County in south central Virginia...
  Patrick County in southwestern Virginia...

* Until 430 AM EDT

* At 1035 PM EDT, Doppler radar indicated a band of persistent 
  thunderstorms with very heavy rainfall from northwest North 
  Carolina into extreme western Henry county in Virginia. Rainfall 
  amounts of 2 to 4 inches have fallen in the past 1 to 2 hours. 
  This will cause flash flooding in the warning area.

* Some locations that will experience flooding include...
  Mount Airy...
  North Wilkesboro...
  Wilkesboro...
  Flat Rock...
  and Stuart.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

When it is safe to do so, please send your reports of flooding,
including mudslides or flooded roads, 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 3607 8141 3612 8154 3619 8147 3624 8147
      3648 8107 3656 8088 3656 8084 3657 8085
      3673 8048 3671 8046 3674 8045 3680 8029
      3682 8007 3678 8001 3683 7999 3663 8002
      3654 8014 3647 8037 3643 8068 3604 8138

$$

MBS

2 follow-up statements

656 
WGUS71 KRNK 310428
FFSRNK

Flash Flood Statement
National Weather Service BLACKSBURG VA
1228 AM EDT TUE JUL 31 2018

NCC005-169-171-193-VAC035-089-141-310830-
/O.CON.KRNK.FF.W.0049.000000T0000Z-180731T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Alleghany NC-Surry NC-Wilkes NC-Stokes NC-Carroll VA-Henry VA-
Patrick VA-
1228 AM EDT TUE JUL 31 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM EDT FOR 
SOUTHEASTERN ALLEGHANY...NORTHERN SURRY AND WILKES COUNTIES IN
NORTHWESTERN NORTH CAROLINA...NORTHWESTERN STOKES COUNTY IN NORTH
CENTRAL NORTH CAROLINA...SOUTHEASTERN CARROLL COUNTY IN SOUTHWESTERN
VIRGINIA...NORTHWESTERN HENRY COUNTY IN SOUTH CENTRAL VIRGINIA AND
PATRICK COUNTIES IN SOUTHWESTERN VIRGINIA...

At 1220 AM EDT, Doppler radar indicated thunderstorms producing 
heavy rain across the warned area. Rainfall amounts of 2 to 5 inches 
have fallen in the past 1 to 3 hours.  Surry county 911 reported 
flooding along Sparger Road in Mount Airy. 

Some locations that will experience flooding include...
Mount Airy...
North Wilkesboro...
Wilkesboro...
Flat Rock...
and Stuart.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

When it is safe to do so, please send your reports of flooding,
including mudslides or flooded roads, 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 3607 8141 3612 8154 3619 8147 3624 8147
      3648 8107 3656 8088 3656 8084 3657 8085
      3673 8048 3671 8046 3674 8045 3680 8029
      3682 8007 3678 8001 3683 7999 3663 8002
      3654 8014 3647 8037 3643 8068 3604 8138

$$

KK

038 
WGUS71 KRNK 310828
FFSRNK

Flash Flood Statement
National Weather Service BLACKSBURG VA
428 AM EDT TUE JUL 31 2018

NCC005-169-171-193-VAC035-089-141-310837-
/O.EXP.KRNK.FF.W.0049.000000T0000Z-180731T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Alleghany NC-Surry NC-Wilkes NC-Stokes NC-Carroll VA-Henry VA-
Patrick VA-
428 AM EDT TUE JUL 31 2018

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN ALLEGHANY...NORTHERN 
SURRY AND WILKES COUNTIES IN NORTHWESTERN NORTH 
CAROLINA...NORTHWESTERN STOKES COUNTY IN NORTH CENTRAL NORTH 
CAROLINA...SOUTHEASTERN CARROLL COUNTY IN SOUTHWESTERN 
VIRGINIA...NORTHWESTERN HENRY COUNTY IN SOUTH CENTRAL VIRGINIA AND 
PATRICK COUNTIES IN SOUTHWESTERN VIRGINIA WILL EXPIRE AT 430 AM 
EDT...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

When it is safe to do so, please send your reports of flooding,
including mudslides or flooded roads, 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 3607 8141 3612 8154 3619 8147 3624 8147
      3648 8107 3656 8088 3656 8084 3657 8085
      3673 8048 3671 8046 3674 8045 3680 8029
      3682 8007 3678 8001 3683 7999 3663 8002
      3654 8014 3647 8037 3643 8068 3604 8138

$$

KK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 8:15 PM EDT	Special Weather Statement	RNK	Floyd	45 min
Jul 30, 8:16 PM EDT	Areal Flood Advisory	RNK	Bedford, Campbell	2 hr
Jul 30, 8:29 PM EDT	Areal Flood Advisory	RNK	Grayson, Wythe	2 hr
Jul 30, 8:32 PM EDT	Areal Flood Advisory	RNK	Floyd, Franklin, Patrick	2 hr
Jul 30, 8:34 PM EDT	Special Weather Statement	RNK	Franklin	41 min
Jul 30, 8:52 PM EDT	Flash Flood Warning	RNK	Franklin	6 hr
Jul 30, 9:03 PM EDT	Special Weather Statement	RNK	Henry, Patrick	42 min
Jul 30, 9:07 PM EDT	Special Weather Statement	RNK	Franklin	38 min
Jul 30, 9:37 PM EDT	Areal Flood Advisory	RNK	Carroll, Floyd, Patrick	68 min
Jul 30, 9:39 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Patrick	36 min
Jul 30, 9:52 PM EDT	Special Weather Statement	RNK	Charlotte	53 min
Jul 30, 9:57 PM EDT	Areal Flood Advisory	RNK	Henry, Patrick	45 min
Jul 30, 11:23 PM EDT	Special Weather Statement	RNK	Pittsylvania	67 min
Jul 30, 11:51 PM EDT	Areal Flood Warning	RNK	Franklin, Henry, Pittsylvania, City of Martinsville	4 hr
Jul 31, 3:46 AM EDT	Flash Flood Watch	RNK	Amherst, Bedford, Campbell, Carroll, Floyd, Franklin and 8 more	24 hr
Jul 31, 4:24 PM EDT	Special Weather Statement	RNK	Smyth, Tazewell	66 min
Jul 31, 5:29 PM EDT	Special Weather Statement	RNK	Bland, Smyth	61 min
Jul 31, 6:23 PM EDT	Areal Flood Advisory	RNK	Bland, Giles, Wythe	112 min
Jul 31, 6:29 PM EDT	Special Weather Statement	RNK	Giles, Wythe	61 min
Jul 30, 9:05 PM EDT	Areal Flood Advisory	RNK	Alleghany, Wilkes	96 min
Jul 30, 9:48 PM EDT	Special Weather Statement	RNK	Surry, Wilkes	57 min
Jul 30, 10:18 PM EDT	Special Weather Statement	RNK	Stokes	57 min
Jul 30, 11:01 PM EDT	Special Weather Statement	RNK	Wilkes	59 min
Jul 30, 11:19 PM EDT	Special Weather Statement	RNK	Stokes	41 min
Jul 31, 1:41 AM EDT	Areal Flood Advisory	RNK	Stokes, Surry, Wilkes, Yadkin	2 hr
Jul 31, 1:29 PM EDT	Areal Flood Advisory	RNK	Surry, Wilkes, Yadkin	61 min
Jul 31, 2:23 PM EDT	Flash Flood Warning	RNK	Surry, Wilkes, Yadkin	6 hr
Jul 31, 2:27 PM EDT	Special Weather Statement	RNK	Yadkin	33 min
Jul 31, 2:30 PM EDT	Severe Thunderstorm Warning	RNK	Surry, Wilkes, Yadkin	60 min
Jul 31, 2:47 PM EDT	Special Weather Statement	RNK	Wilkes	28 min
Jul 31, 2:58 PM EDT	Areal Flood Advisory	RNK	Stokes, Surry, Yadkin	6 hr
Jul 31, 3:28 PM EDT	Special Weather Statement	RNK	Yadkin	62 min
Jul 31, 3:59 PM EDT	Severe Thunderstorm Warning	RNK	Yadkin	61 min
Jul 31, 4:03 PM EDT	Flash Flood Warning	RNK	Yadkin	6 hr
Jul 31, 5:25 PM EDT	Special Weather Statement	RNK	Rockingham, Stokes	65 min
Jul 31, 5:33 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham, Stokes	29 min

Nearby

Flash Flood Warnings in North Carolina, 2018 Flash Flood Warnings in Virginia, 2018 Every flash flood warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.