Alert archive / Virginia / Flash Flood Warnings in 2018

Flash Flood Warning 13, NWS Blacksburg, VA

May 18, 2018Carroll County, Patrick County, Virginia; Surry County, Yadkin County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at May 18, 2018, 4:01 PM EDT for Carroll County, Patrick County, Virginia; Surry County, Yadkin 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, 4:01 PM EDT (20:01 UTC)
Expired: May 18, 2018, 10:00 PM EDT
In force: 6 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

Counties Surry County, NC, Yadkin County, NC, Carroll County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 80 km from the middle of the area, began a volume at 20:02 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, 4:15 PM EDT	FLASH FLOOD	Mount Airy, NC	SEVERAL ROADS FLOODED IN THE MOUNT AIRY AREA INCLUDING AIMS AVENUS, BLUEMONT ROAD, SNOWHILL DRIVE, OLD TOAST ROAD, QUAKER ROAD. THERE ARE ALSO TREES DOWN IN THE WHITE PLAINS AREA, FLATROCK AND PILOT MOUNTAIN.

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, 8.0 hours before the alert went out and 71 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.

967 
WGUS51 KRNK 182001
FFWRNK
NCC171-197-VAC035-141-190200-
/O.NEW.KRNK.FF.W.0013.180518T2001Z-180519T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in BLACKSBURG has issued a

* Flash Flood Warning for...
  Eastern Surry County in northwestern North Carolina...
  Yadkin County in northwestern North Carolina...
  Eastern Carroll County in southwestern Virginia...
  Southwestern Patrick County in southwestern Virginia...

* Until 1000 PM EDT Friday

* At 359 PM EDT, Flooding continues from heavy rainfall earlier 
  today, and more thunderstorms with heavy rain are moving into the 
  region from the south. This will create new flooding and worsen 
  ongoing flooding.


* Some locations that will experience flooding include...
  Mount Airy...
  Fairview...
  Flat Rock...
  Yadkinville...
  and Hillsville.

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 3605 8075 3658 8070 3660 8081 3689 8071
      3656 8052 3656 8043 3612 8046 3611 8051
      3605 8050

$$

MBS

2 follow-up statements

361 
WGUS71 KRNK 182216
FFSRNK

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

NCC171-197-VAC035-141-190200-
/O.CON.KRNK.FF.W.0013.000000T0000Z-180519T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Surry NC-Yadkin NC-Carroll VA-Patrick VA-
616 PM EDT FRI MAY 18 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR 
EASTERN SURRY...YADKIN...EASTERN CARROLL AND SOUTHWESTERN PATRICK
COUNTIES...

At 613 PM EDT, Runoff from heavy rain earlier today caused part of 
Epworth Road to wash away, and flooding of other area roadways in 
the warning area was also reported. Additional rainfall is occurring 
and flooding is expected to continue through this evening.

Some locations that will experience flooding include...
Mount Airy...
Fairview...
Flat Rock...
Yadkinville...
and Hillsville.

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 3605 8075 3658 8070 3660 8081 3689 8071
      3656 8052 3656 8043 3612 8046 3611 8051
      3605 8050

$$

MBS

446 
WGUS71 KRNK 190158
FFSRNK

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

NCC171-197-VAC035-141-190207-
/O.EXP.KRNK.FF.W.0013.000000T0000Z-180519T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Surry NC-Yadkin NC-Carroll VA-Patrick VA-
958 PM EDT FRI MAY 18 2018

...THE FLASH FLOOD WARNING HAS BEEN REPLACED WITH AN AREAL FLOOD 
WARNING FOR EASTERN SURRY...YADKIN...EASTERN CARROLL AND 
SOUTHWESTERN 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 3605 8075 3658 8070 3660 8081 3689 8071
      3656 8052 3656 8043 3612 8046 3611 8051
      3605 8050

$$

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, 3:20 PM EDT	Flash Flood Warning	RNK	Carroll, Floyd, Franklin, Henry, Patrick	6 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, 4:24 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.