Alert archive / Virginia / Flash Flood Warnings in 2021

Flash Flood Warning 60, NWS Wakefield, VA

August 30, 2021Chesterfield County, City of Richmond, Virginia

NWS Wakefield, VA issued this flash flood warning at Aug 30, 2021, 7:29 PM EDT for Chesterfield County, City of Richmond, Virginia. It was in force for 2 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: Aug 30, 2021, 7:29 PM EDT (23:29 UTC)
Expired: Aug 30, 2021, 9:30 PM EDT
In force: 2 hr
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Flood severity: None

Counties Chesterfield County, VA, City of Richmond, VA

The radar

The Norfolk radar (KAKQ), 65 km from the middle of the area, began a volume at 23:30 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
Aug 30, 8:00 PM EDT	FLASH FLOOD	2 Ssw Richmond, VA	MELODY ROAD FLOODED AND IMPASSIBLE.

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.5 hours before the alert went out and 167 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: 843 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 860 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

117 
WGUS51 KAKQ 302329
FFWAKQ
VAC041-760-310130-
/O.NEW.KAKQ.FF.W.0060.210830T2329Z-210831T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wakefield VA
729 PM EDT Mon Aug 30 2021

The National Weather Service in Wakefield has issued a

* Flash Flood Warning for...
  Central Chesterfield County in central Virginia...
  The City of Richmond in central Virginia...

* Until 930 PM EDT.

* At 729 PM EDT, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across south Richmond and 
  surrounding areas. Between 1.5 and 2 inches of rain have fallen. 
  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 and automated gauges.

  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...
  Richmond, Bensley, Bellwood and Drewrys Bluff.

This includes the following streams and drainages...
  Kingsland Creek, James River, Broad Rock Creek, Falling Creek and 
  Reedy Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3748 7751 3749 7749 3749 7746 3747 7742
      3745 7742 3744 7743 3743 7743 3742 7742
      3742 7740 3741 7741 3740 7743 3741 7747
      3744 7750 3746 7751

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

JO

1 follow-up statement

501 
WGUS71 KAKQ 310134
FFSAKQ

Flash Flood Statement
National Weather Service Wakefield VA
934 PM EDT Mon Aug 30 2021

VAC041-760-310144-
/O.EXP.KAKQ.FF.W.0060.000000T0000Z-210831T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chesterfield VA-City of Richmond VA-
934 PM EDT Mon Aug 30 2021

...FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL CHESTERFIELD COUNTY 
AND THE CITY OF RICHMOND...

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

LAT...LON 3748 7751 3749 7749 3749 7746 3747 7742
      3745 7742 3744 7743 3743 7743 3742 7742
      3742 7740 3741 7741 3740 7743 3741 7747
      3744 7750 3746 7751

$$

05

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 11:03 PM EDT	Special Weather Statement	AKQ	Prince Edward	57 min
Aug 30, 4:55 PM EDT	Special Weather Statement	AKQ	Fluvanna, Louisa	35 min
Aug 30, 5:07 PM EDT	Special Weather Statement	AKQ	Prince Edward	38 min
Aug 30, 5:08 PM EDT	Special Weather Statement	AKQ	Chesterfield	22 min
Aug 30, 5:31 PM EDT	Special Weather Statement	AKQ	Fluvanna, Goochland, Louisa	44 min
Aug 30, 5:47 PM EDT	Special Weather Statement	AKQ	Westmoreland	43 min
Aug 30, 6:13 PM EDT	Special Weather Statement	AKQ	Goochland, Hanover, Powhatan	47 min
Aug 30, 6:17 PM EDT	Severe Thunderstorm Warning	AKQ	Chesterfield, Goochland, Hanover, Henrico, Louisa, Powhatan	43 min
Aug 30, 6:27 PM EDT	Special Weather Statement	AKQ	Nottoway	48 min
Aug 30, 6:48 PM EDT	Severe Thunderstorm Warning	AKQ	Amelia, Dinwiddie, Nottoway	42 min
Aug 30, 6:54 PM EDT	Severe Thunderstorm Warning	AKQ	Amelia, Chesterfield, Powhatan	51 min
Aug 30, 7:09 PM EDT	Areal Flood Advisory	AKQ	Chesterfield, City of Richmond	2 hr
Aug 30, 7:11 PM EDT	Special Weather Statement	AKQ	City of Richmond	49 min
Aug 30, 7:16 PM EDT	Severe Thunderstorm Warning	AKQ	Chesterfield, City of Richmond	44 min
Aug 30, 7:43 PM EDT	Severe Thunderstorm Warning	AKQ	Charles City, Chesterfield, Dinwiddie, Prince George, City of Colonial Heights, City of Hopewell and 1 more	47 min
Aug 30, 7:45 PM EDT	Special Marine Warning	AKQ		60 min
Aug 30, 7:49 PM EDT	Special Weather Statement	AKQ	Brunswick, Dinwiddie	41 min
Aug 30, 7:57 PM EDT	Special Weather Statement	AKQ	City of Hampton, City of Poquoson	33 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.