Alert archive / Virginia / Flash Flood Warnings in 2021

Flash Flood Warning 36, NWS Wakefield, VA

July 28, 2021York County, City of Hampton, City of Newport News, Virginia

NWS Wakefield, VA issued this flash flood warning at Jul 28, 2021, 1:51 PM EDT for York County, City of Hampton, City of Newport News, Virginia. It was in force for 114 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: Jul 28, 2021, 1:51 PM EDT (17:51 UTC)
Expired: Jul 28, 2021, 3:45 PM EDT
In force: 114 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Flood severity: None

Counties City of Hampton, VA, City of Newport News, VA, York County, VA

The radar

The Norfolk radar (KAKQ), 49 km from the middle of the area, began a volume at 17:54 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 5.9 hours before the alert went out and 137 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: 2437 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1072 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: -3 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -1.1

Open this sounding in Storm Lab

The text

As transmitted.

350 
WGUS51 KAKQ 281751
FFWAKQ
VAC199-650-700-281945-
/O.NEW.KAKQ.FF.W.0036.210728T1751Z-210728T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wakefield VA
151 PM EDT Wed Jul 28 2021

The National Weather Service in Wakefield has issued a

* Flash Flood Warning for...
  York County in southeastern Virginia...
  The City of Hampton in southeastern Virginia...
  The Southern City of Newport News in southeastern Virginia...

* Until 345 PM EDT.

* At 151 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to 2 inches of rain have 
  fallen. The expected rainfall rate is 2 to 3 inches in 1 hour. 
  Additional rainfall amounts up to 1 inch 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...
  Newport News, Hampton, Christopher Newport University, Hampton 
  University, Northampton, Beaconsdale, Hilton Village, Raleigh 
  Terrace, Oyster Point and Menchville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3705 7656 3706 7657 3713 7649 3711 7644
      3709 7638 3704 7635 3698 7632 3699 7634
      3698 7636 3694 7640 3696 7645 3699 7648
      3701 7649 3704 7654 3705 7655

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-3 INCHES IN 1 HOUR

$$

Poche

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 2:23 AM EDT	Special Weather Statement	AKQ	Prince Edward	37 min
Jul 28, 12:11 PM EDT	Special Marine Warning	AKQ		49 min
Jul 28, 12:13 PM EDT	Special Weather Statement	AKQ	York	47 min
Jul 28, 12:25 PM EDT	Severe Thunderstorm Warning	AKQ	York, City of Hampton, City of Newport News, City of Poquoson	50 min
Jul 28, 12:39 PM EDT	Special Marine Warning	AKQ		66 min
Jul 28, 1:10 PM EDT	Special Weather Statement	AKQ	City of Chesapeake, City of Portsmouth	65 min
Jul 28, 1:16 PM EDT	Areal Flood Advisory	AKQ	York, City of Hampton, City of Newport News	119 min
Jul 28, 1:20 PM EDT	Special Weather Statement	AKQ	City of Newport News	40 min
Jul 28, 1:23 PM EDT	Special Marine Warning	AKQ		67 min
Jul 28, 1:25 PM EDT	Special Weather Statement	AKQ	Northampton	50 min
Jul 28, 1:38 PM EDT	Severe Thunderstorm Warning	AKQ	Isle of Wight, City of Chesapeake, City of Portsmouth, City of Suffolk	36 min
Jul 28, 1:42 PM EDT	Special Marine Warning	AKQ		42 min
Jul 28, 1:47 PM EDT	Special Weather Statement	AKQ	City of Chesapeake	58 min
Jul 28, 1:57 PM EDT	Special Weather Statement	AKQ	Isle of Wight	48 min
Jul 28, 2:05 PM EDT	Special Marine Warning	AKQ		33 min
Jul 28, 2:12 PM EDT	Severe Thunderstorm Warning	AKQ	City of Chesapeake, City of Virginia Beach	48 min
Jul 28, 2:28 PM EDT	Special Marine Warning	AKQ		22 min
Jul 28, 2:32 PM EDT	Areal Flood Advisory	AKQ	City of Chesapeake, City of Virginia Beach	3 hr
Jul 28, 2:53 PM EDT	Special Weather Statement	AKQ	City of Virginia Beach	52 min
Jul 28, 2:56 PM EDT	Special Weather Statement	AKQ	Sussex	34 min
Jul 28, 3:10 PM EDT	Areal Flood Advisory	AKQ	Isle of Wight, Southampton	3 hr
Jul 28, 5:43 PM EDT	Special Weather Statement	AKQ	Northumberland	32 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.