Alert archive / Virginia / Flash Flood Warnings in 2021

Flash Flood Warning 59, NWS Wakefield, VA

August 27, 2021Prince Edward County, Virginia

NWS Wakefield, VA issued this flash flood warning at Aug 27, 2021, 4:42 PM EDT for Prince Edward County, Virginia. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 27, 2021, 4:42 PM EDT (20:42 UTC)
Expired: Aug 27, 2021, 7:45 PM EDT
In force: 3 hr
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Flood severity: None

County Prince Edward County, VA

The radar

The Roanoke radar (KFCX), 146 km from the middle of the area, began a volume at 20:45 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

Roanoke, VA (KRNK), launched 12:00Z, 8.7 hours before the alert went out and 75 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: 436 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 913 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: -26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

293 
WGUS51 KAKQ 272042
FFWAKQ
VAC147-272345-
/O.NEW.KAKQ.FF.W.0059.210827T2042Z-210827T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wakefield VA
442 PM EDT Fri Aug 27 2021

The National Weather Service in Wakefield has issued a

* Flash Flood Warning for...
  West Central Prince Edward County in central Virginia...

* Until 745 PM EDT.

* At 442 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. The expected rainfall rate is 1 to 2 inches in 1 
  hour. Additional rainfall amounts of 1 to 2 inches are possible in 
  the warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  mainly rural areas of West Central Prince Edward County

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now. Act quickly to protect your life.

&&

LAT...LON 3727 7867 3728 7866 3728 7861 3726 7860
      3723 7860 3721 7863 3721 7869 3722 7869
      3723 7868 3726 7868

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

Zimmerman

1 follow-up statement

790 
WGUS71 KAKQ 272341
FFSAKQ

Flash Flood Statement
National Weather Service Wakefield VA
741 PM EDT Fri Aug 27 2021

VAC147-272351-
/O.EXP.KAKQ.FF.W.0059.000000T0000Z-210827T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Prince Edward VA-
741 PM EDT Fri Aug 27 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 745 PM EDT THIS EVENING FOR 
WEST CENTRAL PRINCE EDWARD COUNTY...

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

LAT...LON 3727 7867 3728 7866 3728 7861 3726 7860
      3723 7860 3721 7863 3721 7869 3722 7869
      3723 7868 3726 7868

$$

Zimmerman

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 3:52 PM EDT	Special Weather Statement	AKQ	Prince Edward	53 min
Aug 27, 4:14 PM EDT	Severe Thunderstorm Warning	AKQ	Prince Edward	31 min
Aug 27, 4:59 PM EDT	Special Weather Statement	AKQ	Amelia	31 min

Nearby

Flash Flood Warnings in Virginia, 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.