Alert archive / Virginia / Flash Flood Warnings in 2021

Flash Flood Warning 8, NWS Blacksburg, VA

June 11, 2021Pittsylvania County, Virginia

NWS Blacksburg, VA issued this flash flood warning at Jun 11, 2021, 3:05 PM EDT for Pittsylvania County, Virginia. It was in force for 118 min. 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
Jun 11, 2021, 3:05 PM EDT (19:05 UTC)
Expired
Jun 11, 2021, 5:03 PM EDT
In force
118 min
Issued by
NWS Blacksburg, VA
Area
Storm-based polygon
Flood severity
None

County Pittsylvania County, VA

The radar

The Roanoke radar (KFCX), 75 km from the middle of the area, began a volume at 19:07 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

TimeReportWhereRemark
Jun 11, 3:20 PM EDTFLOOD1 N Chatham, VAFLOODING REPORTED AT 200 BLOCK OF WHITTLE STREET IN CHATHAM.

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

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 7.1 hours before the alert went out and 46 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 2021-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 139 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 2021-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
139 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
780 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
38 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

880 
WGUS51 KRNK 111905
FFWRNK
VAC143-112200-
/O.NEW.KRNK.FF.W.0008.210611T1905Z-210611T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Blacksburg has issued a

* Flash Flood Warning for...
  Pittsylvania County in south central Virginia...

* Until 600 PM EDT.

* At 305 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across central Pittsylvania county especially around 
  Keeling, Dry Fork, and Chatham. Between 2 and 3 inches of rain 
  have fallen during the past hour and additional heavy rainfall is 
  expected during the next hour. Flash flooding is imminent!

  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...
  Danville, Chatham, Gretna, Blairs, Callands, Mt Airy and Dry Fork.

This includes the following streams and drainages...
  Banister River and Allen Creek.

Additional rainfall amounts of 1.5 to 2 inches are possible in the 
warned area.

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 3688 7963 3703 7909 3663 7920 3664 7968
      3664 7969

FLASH FLOOD...RADAR INDICATED

$$

RAB
2 follow-up statements
681 
WGUS71 KRNK 112006
FFSRNK

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

VAC143-112200-
/O.CON.KRNK.FF.W.0008.000000T0000Z-210611T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pittsylvania VA-
406 PM EDT Fri Jun 11 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM EDT THIS EVENING 
FOR PITTSYLVANIA COUNTY...

At 406 PM EDT, Doppler radar indicated that rainfall had diminished 
within the warned area. However, flooding was reported in the warned 
area from the 2 to 3 inches of rain that fell during thunderstorms 
in the last couple of hours. Flooding remains a concern for a bit 
longer until water levels have had a chance to recede.

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...
  Danville, Chatham, Gretna, Blairs, Callands, Mt Airy and Dry Fork.

This includes the following streams and drainages...
  Banister River and Allen Creek.

Additional rainfall amounts of 1.5 to 2 inches are possible in the 
warned area.

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 3688 7963 3703 7909 3663 7920 3664 7968
      3664 7969

FLASH FLOOD...RADAR INDICATED

$$

RAB
667 
WGUS71 KRNK 112103
FFSRNK

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

VAC143-112113-
/O.CAN.KRNK.FF.W.0008.000000T0000Z-210611T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pittsylvania VA-
503 PM EDT Fri Jun 11 2021

...FLASH FLOOD WARNING IS CANCELLED FOR PITTSYLVANIA 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 3688 7963 3703 7909 3663 7920 3664 7968
      3664 7969

$$

RAB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 10:16 PM EDTSpecial Weather StatementRNKCity of Galax29 min
Jun 10, 10:47 PM EDTSpecial Weather StatementRNKCarroll28 min
Jun 11, 2:46 AM EDTSpecial Weather StatementRNKAppomattox59 min
Jun 11, 12:58 PM EDTSpecial Weather StatementRNKPatrick32 min
Jun 11, 1:46 PM EDTSevere Thunderstorm WarningRNKHenry, Pittsylvania, City of Danville40 min
Jun 11, 2:17 PM EDTSpecial Weather StatementRNKCity of Martinsville28 min
Jun 11, 2:51 PM EDTSpecial Weather StatementRNKPittsylvania24 min
Jun 11, 3:13 PM EDTSpecial Weather StatementRNKHalifax32 min
Jun 11, 3:21 PM EDTAreal Flood AdvisoryRNKAppomattox, Buckingham114 min
Jun 11, 3:34 PM EDTFlash Flood WarningRNKAppomattox, Buckingham4 hr
Jun 11, 3:41 PM EDTSpecial Weather StatementRNKBuckingham34 min
Jun 11, 3:51 PM EDTAreal Flood AdvisoryRNKAmherst, Bedford, Campbell, City of Lynchburg3 hr
Jun 11, 4:05 PM EDTAreal Flood AdvisoryRNKAlleghany, Bath5 hr
Jun 11, 4:13 PM EDTFlash Flood WarningRNKAmherst, Bedford, Campbell, Rockbridge, City of Lynchburg4 hr
Jun 11, 4:14 PM EDTSpecial Weather StatementRNKPulaski, City of Radford46 min
Jun 11, 4:56 PM EDTAreal Flood AdvisoryRNKAlleghany, Botetourt, Rockbridge5 hr
Jun 11, 5:22 PM EDTSpecial Weather StatementRNKBland, Tazewell53 min
Jun 11, 5:55 PM EDTSpecial Weather StatementRNKBland50 min
Jun 11, 6:01 PM EDTSpecial Weather StatementRNKBedford44 min
Jun 11, 6:21 PM EDTAreal Flood AdvisoryRNKBedford, Botetourt4 hr
Jun 11, 6:41 PM EDTSpecial Weather StatementRNKBedford34 min
Jun 11, 7:08 PM EDTAreal Flood AdvisoryRNKBedford, Campbell2 hr
Jun 11, 7:25 PM EDTAreal Flood WarningRNKAppomattox, Buckingham6 hr
Jun 11, 7:51 PM EDTAreal Flood AdvisoryRNKRoanoke, City of Roanoke, City of Salem111 min

Nearby

Flash Flood Warnings in Virginia, 2021Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.