Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 7, NWS Blacksburg, VA

June 11, 2021Stokes County, North Carolina

NWS Blacksburg, VA issued this flash flood warning at Jun 11, 2021, 2:52 PM EDT for Stokes County, North Carolina. It was in force for 77 min. 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 11, 2021, 2:52 PM EDT (18:52 UTC)
Expired: Jun 11, 2021, 4:09 PM EDT
In force: 77 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Flood severity: None

County Stokes County, NC

The radar

The Roanoke radar (KFCX), 70 km from the middle of the area, began a volume at 18:56 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, 6.9 hours before the alert went out and 47 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: 329 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 871 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

085 
WGUS51 KRNK 111852
FFWRNK
NCC169-112145-
/O.NEW.KRNK.FF.W.0007.210611T1852Z-210611T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Blacksburg VA
252 PM EDT Fri Jun 11 2021

The National Weather Service in Blacksburg has issued a

* Flash Flood Warning for...
  Stokes County in north central North Carolina...

* Until 545 PM EDT.

* At 252 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across western and southern Stokes county, especially 
  between King, Pilot Mountain, and Vade Mecum. Between 1.5 and 2 
  inches of rain have fallen in some of these areas. Flash flooding 
  is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Walnut Cove, Danbury, Sandy Ridge, Francisco, Hanging Rock State 
  Park, Meadows and Capella.

This includes the following streams and drainages...
  Buffalo Creek, Big Creek, Baker Branch, Brushy Fork Creek, Archies 
  Creek, Big Beaver Island Creek and Belews Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

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.

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 3626 8045 3654 8044 3654 8016 3654 8012
      3654 8009 3654 8005 3654 8004 3654 8003
      3626 8004 3626 8033 3626 8034 3626 8038
      3626 8039 3626 8042

FLASH FLOOD...RADAR INDICATED

$$

RAB

2 follow-up statements

931 
WGUS71 KRNK 111947
FFSRNK

Flash Flood Statement
National Weather Service Blacksburg VA
347 PM EDT Fri Jun 11 2021

NCC169-112145-
/O.CON.KRNK.FF.W.0007.000000T0000Z-210611T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Stokes NC-
347 PM EDT Fri Jun 11 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM EDT THIS 
AFTERNOON FOR STOKES COUNTY...

At 347 PM EDT, Rainfall has decreased across Stokes County.  
Rainfall of 1.5 to 2.0 inches fell around King, east of Pilot 
Mountain, and near Meadows. Flooding in and near these areas remains 
possible.

HAZARD...Flooding and flash flooding caused by thunderstorms.

SOURCE...Doppler radar.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other
         drainage and low lying areas.

Some locations that will experience flash flooding include...
  Walnut Cove, Danbury, Sandy Ridge, Francisco, Hanging Rock State 
  Park, Meadows and Capella.

This includes the following streams and drainages...
  Buffalo Creek, Big Creek, Baker Branch, Brushy Fork Creek, Archies 
  Creek, Big Beaver Island Creek and Belews Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

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.

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 3626 8045 3654 8044 3654 8016 3654 8012
      3654 8009 3654 8005 3654 8004 3654 8003
      3626 8004 3626 8033 3626 8034 3626 8038
      3626 8039 3626 8042

FLASH FLOOD...RADAR INDICATED

$$

RAB

168 
WGUS71 KRNK 112009
FFSRNK

Flash Flood Statement
National Weather Service Blacksburg VA
409 PM EDT Fri Jun 11 2021

NCC169-112019-
/O.CAN.KRNK.FF.W.0007.000000T0000Z-210611T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Stokes NC-
409 PM EDT Fri Jun 11 2021

...FLASH FLOOD WARNING IS CANCELLED FOR STOKES COUNTY...

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

A Flash Flood Watch remains in effect until 1200 AM EDT Saturday for 
portions of North Carolina...Virginia and southeast West Virginia.

LAT...LON 3626 8045 3654 8044 3654 8016 3654 8012
      3654 8009 3654 8005 3654 8004 3654 8003
      3626 8004 3626 8033 3626 8034 3626 8038
      3626 8039 3626 8042

$$

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 8:12 PM EDT	Areal Flood Advisory	RNK	Caswell	111 min
Jun 11, 12:56 PM EDT	Flash Flood Warning	RNK	Rockingham	3 hr
Jun 11, 1:13 PM EDT	Areal Flood Advisory	RNK	Stokes, Surry, Yadkin	3 hr
Jun 11, 1:24 PM EDT	Special Weather Statement	RNK	Caswell	51 min
Jun 11, 1:35 PM EDT	Severe Thunderstorm Warning	RNK	Stokes, Surry, Yadkin	55 min
Jun 11, 1:46 PM EDT	Severe Thunderstorm Warning	RNK	Caswell, Rockingham	40 min
Jun 11, 1:52 PM EDT	Flash Flood Warning	RNK	Yadkin	2 hr
Jun 11, 2:12 PM EDT	Flash Flood Warning	RNK	Caswell	112 min
Jun 11, 2:38 PM EDT	Special Weather Statement	RNK	Caswell	37 min
Jun 11, 4:47 PM EDT	Special Weather Statement	RNK	Yadkin	43 min

Nearby

Flash Flood Warnings in North Carolina, 2021 Every flash flood warning 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.