Alert archive / Virginia / Flash Flood Warnings in 2020

Flash Flood Warning 42, NWS Wakefield, VA

August 14, 2020James City County, York County, Virginia

NWS Wakefield, VA issued this flash flood warning at Aug 14, 2020, 6:12 PM EDT for James City County, York County, Virginia. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 14, 2020, 6:12 PM EDT (22:12 UTC)
Expired: Aug 14, 2020, 8:15 PM EDT
In force: 2 hr
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Flood severity: None

Counties James City County, VA, York County, VA

The radar

The Norfolk radar (KAKQ), 45 km from the middle of the area, began a volume at 22:15 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.2 hours before the alert went out and 198 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: 94 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 706 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -38 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wakefield, VA wrote its last area forecast discussion before this flash flood warning went out at Aug 14, 3:33 PM EDT, 2 hours 39 minutes earlier.

Area forecast discussion, Aug 14, 3:33 PM EDT, 2 hours 39 minutes before

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Hazardous weather outlook, Aug 14, 4:02 AM EDT, 14 hours 10 minutes before

Hazardous Weather Outlook
National Weather Service Wakefield VA
402 AM EDT Fri Aug 14 2020

MDZ021>025-NCZ012>017-030>032-102-VAZ048-060>062-064>069-075>090-092-
093-095>100-509>525-150815-
Dorchester-Wicomico-Somerset-Inland Worcester-Maryland Beaches-
Northampton-Hertford-Gates-Pasquotank-Camden-Western Currituck-
Bertie-Chowan-Perquimans-Eastern Currituck-Fluvanna-Prince Edward-
Cumberland-Goochland-Caroline-Mecklenburg-Lunenburg-Nottoway-Amelia-
Powhatan-Westmoreland-Richmond-Northumberland-Lancaster-Brunswick-
Dinwiddie-Prince George-Charles City-New Kent-Gloucester-Middlesex-
Mathews-Greensville-Sussex-Surry-James City-Southampton-
Isle of Wight-Norfolk/Portsmouth-Suffolk-Chesapeake-Virginia Beach-
Accomack-Western Louisa-Eastern Louisa-Western Hanover-
Eastern Hanover-Western Chesterfield-
Eastern Chesterfield (Including Col. Heights)-
Western Henrico (Including the City of Richmond)-Eastern Henrico-
Western King William-Eastern King William-Western King and Queen-
Eastern King and Queen-Western Essex-Eastern Essex-York-Newport News-
Hampton/Poquoson-
402 AM EDT Fri Aug 14 2020

This Hazardous Weather Outlook is for southeast Maryland, northeast
North Carolina, central Virginia, east central Virginia, eastern
Virginia, north central Virginia, south central Virginia and
southeast Virginia.

.DAY ONE...Today and tonight.

Additional showers and thunderstorms are likely today. Periods of
locally heavy rainfall...along with flooding of poor drainage and
urban areas are possible.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Additional showers and thunderstorms are likely through the upcoming
weekend. Periods of locally heavy rainfall...along with flooding of
poor drainage and urban areas are possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Butner

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 4:33 AM EDT	Areal Flood Advisory	AKQ	Essex, Richmond	117 min
Aug 14, 10:23 AM EDT	Areal Flood Advisory	AKQ	York, City of Hampton, City of Newport News, City of Poquoson	118 min
Aug 14, 2:21 PM EDT	Areal Flood Advisory	AKQ	City of Virginia Beach	114 min
Aug 14, 2:44 PM EDT	Small Craft Advisory	AKQ		3 days
Aug 14, 2:49 PM EDT	Areal Flood Advisory	AKQ	City of Chesapeake	116 min
Aug 14, 5:57 PM EDT	Areal Flood Advisory	AKQ	James City, York, City of Williamsburg	2 hr
Aug 14, 6:56 PM EDT	Areal Flood Advisory	AKQ	Charles City, Prince George	2 hr
Aug 14, 8:32 AM EDT	Areal Flood Advisory	AKQ	Worcester	104 min

Nearby

Flash Flood Warnings in Virginia, 2020 Every flash flood warning in 2020

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.