Alert archive / Virginia / Flash Flood Watches in 2016

Flash Flood Watch 1, NWS Wakefield, VA

September 1, 201616 counties in Virginia; 9 counties in North Carolina

NWS Wakefield, VA issued this flash flood watch at Sep 1, 2016, 2:53 PM EDT for 16 counties in Virginia; 9 counties in North Carolina. It took effect at Sep 2, 2016, 8:00 PM EDT. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued: Sep 1, 2016, 2:53 PM EDT (18:53 UTC)
In effect from: Sep 2, 2016, 8:00 PM EDT
Expired: Sep 3, 2016, 2:49 PM EDT
In force: 19 hr
Issued by: NWS Wakefield, VA
Flood severity: None

All 25 counties

Bertie County, NC, Camden County, NC, Chowan County, NC, Currituck County, NC, Gates County, NC, Hertford County, NC, Northampton County, NC, Pasquotank County, NC, Perquimans County, NC, Accomack County, VA, City of Chesapeake, VA, City of Emporia, VA, City of Franklin, VA, City of Hampton, VA, City of Newport News, VA, City of Poquoson, VA, City of Virginia Beach, VA, City of Williamsburg, VA, Greensville County, VA, James City County, VA, Northampton County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA, York County, VA

The radar

The Norfolk radar (KAKQ), 42 km from the middle of the area, began a volume at 18:54 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

Newport, NC (KMHX), launched 12:00Z, 6.9 hours before the alert went out and 221 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: 773 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 652 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: -34 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 watch 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 watch went out at Sep 1, 2:31 PM EDT, 22 minutes earlier.

Area forecast discussion, Sep 1, 2:31 PM EDT, 22 minutes before

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Hazardous weather outlook, Sep 1, 10:26 AM EDT, 4 hours 27 minutes before

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In the hours before

Special weather statement, Sep 1, 12:45 PM EDT, 2 hours 8 minutes before

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Special weather statement, Sep 1, 1:20 PM EDT, 1 hour 33 minutes before

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Special weather statement, Sep 1, 1:31 PM EDT, 1 hour 22 minutes before

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Special weather statement, Sep 1, 1:55 PM EDT, 58 minutes before

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Special weather statement, Sep 1, 2:09 PM EDT, 44 minutes before

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Special weather statement, Sep 1, 2:13 PM EDT, 40 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 8:05 PM EDT	Special Weather Statement	AKQ	Cumberland, Fluvanna, Goochland, Powhatan	55 min
Aug 31, 8:09 PM EDT	Special Weather Statement	AKQ	Louisa	66 min
Aug 31, 8:48 PM EDT	Special Weather Statement	AKQ	Caroline, Goochland, Hanover, Louisa, Powhatan	42 min
Aug 31, 8:57 PM EDT	Special Weather Statement	AKQ	Caroline	48 min
Aug 31, 9:43 PM EDT	Special Weather Statement	AKQ	Caroline, Hanover	47 min
Aug 31, 10:40 PM EDT	Special Weather Statement	AKQ	Essex, King and Queen, King William	50 min
Sep 1, 12:23 PM EDT	Special Weather Statement	AKQ	Accomack	37 min
Sep 1, 12:45 PM EDT	Special Weather Statement	AKQ	City of Newport News	45 min
Sep 1, 1:20 PM EDT	Special Weather Statement	AKQ	City of Norfolk, City of Portsmouth	40 min
Sep 1, 1:31 PM EDT	Special Weather Statement	AKQ	Southampton, City of Franklin	44 min
Sep 1, 1:55 PM EDT	Special Weather Statement	AKQ	Northampton	50 min
Sep 1, 2:09 PM EDT	Special Weather Statement	AKQ	City of Chesapeake, City of Norfolk, City of Portsmouth, City of Virginia Beach	51 min
Sep 1, 2:31 PM EDT	Severe Thunderstorm Warning	AKQ	Mecklenburg	29 min
Sep 1, 4:17 PM EDT	Special Weather Statement	AKQ	City of Virginia Beach	43 min
Sep 1, 4:47 PM EDT	Beach Hazards Statement	AKQ	Accomack, Northampton, City of Virginia Beach	27 hr
Sep 1, 5:02 PM EDT	Tropical Storm Watch	AKQ	Accomack, Gloucester, James City, Lancaster, Mathews, Middlesex and 10 more	19 hr
Sep 1, 2:13 PM EDT	Special Weather Statement	AKQ	Gates, Hertford	47 min
Sep 1, 3:15 PM EDT	Special Weather Statement	AKQ	Camden	60 min
Sep 1, 3:17 PM EDT	Special Weather Statement	AKQ	Bertie, Chowan, Pasquotank, Perquimans	58 min
Sep 1, 4:11 PM EDT	Special Weather Statement	AKQ	Camden, Currituck, Pasquotank, Perquimans	49 min
Sep 1, 5:53 PM EDT	Special Weather Statement	AKQ	Camden, Pasquotank, Perquimans	52 min
Sep 1, 6:00 PM EDT	Special Weather Statement	AKQ	Camden, Pasquotank, Perquimans	45 min
Sep 1, 6:01 PM EDT	Special Weather Statement	AKQ	Bertie	44 min
Sep 1, 8:22 AM EDT	Special Weather Statement	AKQ	Worcester	38 min
Sep 1, 10:10 AM EDT	Special Weather Statement	AKQ	Dorchester	50 min
Sep 1, 11:28 AM EDT	Special Weather Statement	AKQ	Somerset, Worcester	47 min

Nearby

Flash Flood Watches in Virginia, 2016 Flash Flood Watches in North Carolina, 2016 Every flash flood watch in 2016

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.