Alert archive / Virginia / Flash Flood Warnings in 2018

Flash Flood Warning 9, NWS Blacksburg, VA

May 18, 20185 counties in Virginia; Rockingham County, Stokes County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at May 18, 2018, 3:20 PM EDT for 5 counties in Virginia; Rockingham County, Stokes County, North Carolina. It was in force for 6 hr. 1 report 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: May 18, 2018, 3:20 PM EDT (19:20 UTC)
Expired: May 18, 2018, 9:15 PM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

Counties Rockingham County, NC, Stokes County, NC, Carroll County, VA, Floyd County, VA, Franklin County, VA, Henry County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 30 km from the middle of the area, began a volume at 19:23 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
May 18, 6:29 PM EDT	FLASH FLOOD	2 Sse Dugspur, VA	CREEK WASHING OVER NESTER SCHOOL ROAD BRIDGE

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 12:00Z, 7.3 hours before the alert went out and 86 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: 246 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 626 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

810 
WGUS51 KRNK 181920
FFWRNK
NCC157-169-VAC035-063-067-089-141-190115-
/O.NEW.KRNK.FF.W.0009.180518T1920Z-180519T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service BLACKSBURG VA
320 PM EDT FRI MAY 18 2018

The National Weather Service in BLACKSBURG has issued a

* Flash Flood Warning for...
  Eastern Stokes County in north central North Carolina...
  Western Rockingham County in north central North Carolina...
  Floyd County in southwestern Virginia...
  Northeastern Carroll County in southwestern Virginia...
  Western Henry County in south central Virginia...
  Southwestern Franklin County in west central Virginia...
  Patrick County in southwestern Virginia...

* Until 915 PM EDT

* At 320 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Mayodan...
  Madison...
  Walnut Cove...
  Stuart...
  and Floyd.

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 3626 8019 3654 8018 3656 8052 3689 8071
      3699 8050 3699 8049 3702 8045 3701 8044
      3701 8042 3700 8042 3701 8041 3691 7998
      3626 7997

$$

MBS

2 follow-up statements

870 
WGUS71 KRNK 182155
FFSRNK

Flash Flood Statement
National Weather Service BLACKSBURG VA
555 PM EDT FRI MAY 18 2018

NCC157-169-VAC035-063-067-089-141-190115-
/O.CON.KRNK.FF.W.0009.000000T0000Z-180519T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Stokes NC-Rockingham NC-Floyd VA-Carroll VA-Henry VA-Franklin VA-
Patrick VA-
555 PM EDT FRI MAY 18 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR 
EASTERN STOKES...WESTERN ROCKINGHAM...FLOYD...NORTHEASTERN CARROLL...
WESTERN HENRY...SOUTHWESTERN FRANKLIN AND PATRICK COUNTIES...

At 551 PM EDT, Runoff from earlier heavy rain continues to produce 
flooding, and additional rainfall is likely.

Some locations that will experience flooding include...
Mayodan...
Madison...
Walnut Cove...
Stuart...
and Floyd.

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 3626 8019 3654 8018 3656 8052 3689 8071
      3699 8050 3699 8049 3702 8045 3701 8044
      3701 8042 3700 8042 3701 8041 3691 7998
      3626 7997

$$

MBS

553 
WGUS71 KRNK 190115
FFSRNK

Flash Flood Statement
National Weather Service BLACKSBURG VA
915 PM EDT FRI MAY 18 2018

NCC157-169-VAC035-063-067-089-141-190124-
/O.EXP.KRNK.FF.W.0009.000000T0000Z-180519T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Stokes NC-Rockingham NC-Floyd VA-Carroll VA-Henry VA-Franklin VA-
Patrick VA-
915 PM EDT FRI MAY 18 2018

...THE FLASH FLOOD WARNING HAS BEEN REPLACED WITH AN AREAL FLOOD 
WARNING FOR EASTERN STOKES...WESTERN ROCKINGHAM...FLOYD... 
NORTHEASTERN CARROLL... WESTERN HENRY...SOUTHWESTERN FRANKLIN AND 
PATRICK COUNTIES...

Runoff from earlier heavy rain continues to produce flooding of 
streams, creeks, and poor drainage areas. While some additional 
showers are expected, additional runoff will be much less and 
flooding will gradually recede overnight. 

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 3626 8019 3654 8018 3656 8052 3689 8071
      3699 8050 3699 8049 3702 8045 3701 8044
      3701 8042 3700 8042 3701 8041 3691 7998
      3626 7997

$$

MBS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 8:15 PM EDT	Flash Flood Warning	RNK	Franklin	6 hr
May 17, 11:57 PM EDT	Areal Flood Warning	RNK	Bedford	6 hr
May 18, 1:00 AM EDT	Areal Flood Warning	RNK	Roanoke, City of Roanoke, City of Salem	6 hr
May 18, 4:05 AM EDT	Special Weather Statement	RNK	Halifax, Henry, Patrick, Pittsylvania, City of Danville, City of Martinsville	55 min
May 18, 6:56 AM EDT	Special Weather Statement	RNK	Pittsylvania	64 min
May 18, 1:53 PM EDT	Areal Flood Advisory	RNK	Carroll, Patrick	2 hr
May 18, 2:51 PM EDT	Areal Flood Advisory	RNK	Charlotte, Halifax, Pittsylvania, City of Danville	2 hr
May 18, 3:23 PM EDT	Flash Flood Warning	RNK	Pittsylvania, City of Danville	6 hr
May 18, 3:48 PM EDT	Flash Flood Warning	RNK	Franklin, Henry, Pittsylvania, City of Martinsville	6 hr
May 18, 4:01 PM EDT	Flash Flood Warning	RNK	Carroll, Patrick	6 hr
May 18, 4:24 PM EDT	River Flood Warning	RNK	Halifax	3 days
May 18, 4:29 PM EDT	River Flood Warning	RNK	Charlotte, Halifax	4 days
May 18, 5:02 PM EDT	Flash Flood Warning	RNK	Charlotte, Halifax	6 hr
May 18, 5:22 PM EDT	Areal Flood Warning	RNK	Bedford, Botetourt, Campbell, Floyd, Franklin, Montgomery and 4 more	5 hr
May 18, 6:59 PM EDT	Areal Flood Warning	RNK	Appomattox, Buckingham	6 hr
May 18, 1:59 AM EDT	Special Weather Statement	RNK	Person	61 min
May 18, 6:53 AM EDT	Special Weather Statement	RNK	Ashe, Watauga	52 min
May 18, 7:38 AM EDT	Areal Flood Advisory	RNK	Ashe, Watauga	8 hr
May 18, 11:53 AM EDT	Areal Flood Advisory	RNK	Alleghany, Surry, Wilkes, Yadkin	6 hr
May 18, 3:02 PM EDT	Flash Flood Warning	RNK	Stokes	6 hr
May 18, 3:30 PM EDT	Flash Flood Warning	RNK	Ashe, Watauga	6 hr

Nearby

Flash Flood Warnings in Virginia, 2018 Flash Flood Warnings in North Carolina, 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.