Alert archive / Virginia / High Surf Advisories in 2018

High Surf Advisory 13, NWS Wakefield, VA

October 11, 2018Accomack County, Northampton County, City of Virginia Beach, Virginia; Worcester County, Maryland; Currituck County, North Carolina

NWS Wakefield, VA issued this high surf advisory at Oct 11, 2018, 10:12 AM EDT for Accomack County, Northampton County, City of Virginia Beach, Virginia; Worcester County, Maryland; Currituck County, North Carolina. It took effect at Oct 11, 2018, 6:00 PM EDT. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued: Oct 11, 2018, 10:12 AM EDT (14:12 UTC)
In effect from: Oct 11, 2018, 6:00 PM EDT
Expired: Oct 12, 2018, 6:59 AM EDT
In force: 13 hr
Issued by: NWS Wakefield, VA

Counties Worcester County, MD, Currituck County, NC, Accomack County, VA, City of Virginia Beach, VA, Northampton County, VA

The radar

The Norfolk radar (KAKQ), 113 km from the middle of the area, began a volume at 14:11 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, 2.2 hours before the alert went out and 80 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: 983 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 467 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this high surf advisory 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 high surf advisory went out at Oct 11, 10:11 AM EDT, 1 minute earlier.

Area forecast discussion, Oct 11, 10:11 AM EDT, 1 minute before

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Hazardous weather outlook, Oct 11, 5:14 AM EDT, 4 hours 58 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
Oct 11, 5:26 AM EDT	Coastal Flood Statement	AKQ	Accomack, Gloucester, Lancaster, Mathews, Middlesex, Northampton	11 hr
Oct 11, 11:31 AM EDT	River Flood Warning	AKQ	Brunswick	4 days
Oct 11, 11:31 AM EDT	River Flood Warning	AKQ	Brunswick, Dinwiddie	68 hr
Oct 11, 11:31 AM EDT	River Flood Warning	AKQ	Sussex	5 days
Oct 11, 11:31 AM EDT	River Flood Warning	AKQ	Amelia, Cumberland, Prince Edward	51 hr
Oct 11, 11:31 AM EDT	River Flood Warning	AKQ	Amelia, Chesterfield, Powhatan	7 days
Oct 11, 11:31 AM EDT	River Flood Warning	AKQ	Chesterfield, Dinwiddie, City of Petersburg	7 days
Oct 11, 3:26 PM EDT	Tornado Warning	AKQ	Isle of Wight, City of Suffolk	34 min
Oct 11, 4:13 PM EDT	Flash Flood Warning	AKQ	Fluvanna, Louisa	6 hr
Oct 11, 4:21 PM EDT	Tornado Warning	AKQ	Lunenburg, Prince Edward	24 min
Oct 11, 4:41 PM EDT	Flash Flood Warning	AKQ	Amelia, Cumberland, Lunenburg, Mecklenburg, Nottoway, Powhatan and 1 more	6 hr
Oct 11, 5:09 PM EDT	Tornado Warning	AKQ	Amelia, Chesterfield, Dinwiddie, Nottoway	36 min
Oct 11, 5:32 PM EDT	Tornado Warning	AKQ	Amelia, Chesterfield, Dinwiddie	28 min
Oct 11, 5:36 PM EDT	Tornado Warning Tornado observed	AKQ	Amelia, Cumberland, Powhatan	13 min
Oct 11, 5:38 PM EDT	Flash Flood Warning	AKQ	Goochland, Hanover, Louisa	6 hr
Oct 11, 5:45 PM EDT	Tornado Warning	AKQ	Isle of Wight, City of Suffolk	15 min
Oct 11, 6:01 PM EDT	Flash Flood Warning Emergency	AKQ	Amelia, Cumberland, Lunenburg, Nottoway, Prince Edward	6 hr
Oct 11, 6:32 PM EDT	Flash Flood Warning	AKQ	Caroline, Hanover	6 hr
Oct 11, 6:47 PM EDT	Flash Flood Warning Emergency	AKQ	Amelia, Lunenburg, Nottoway, Powhatan	5 hr
Oct 11, 7:04 PM EDT	Flash Flood Warning	AKQ	Chesterfield, Dinwiddie, Henrico	5 hr
Oct 11, 7:17 PM EDT	Tornado Warning	AKQ	Hanover, King William, New Kent	28 min
Oct 11, 7:20 PM EDT	Tornado Warning	AKQ	Gloucester, Mathews, York	25 min
Oct 11, 7:21 PM EDT	Special Marine Warning	AKQ		24 min
Oct 11, 7:22 PM EDT	Tornado Warning	AKQ	Gloucester, James City, King and Queen, King William, New Kent, York	23 min
Oct 11, 7:33 PM EDT	Flash Flood Warning	AKQ	Charles City, Hanover, Henrico, King and Queen, King William, New Kent and 1 more	6 hr
Oct 11, 7:43 PM EDT	Tornado Warning	AKQ	Gloucester, King and Queen, Middlesex	32 min
Oct 11, 7:47 PM EDT	Tornado Warning	AKQ	Caroline, Hanover, King William, New Kent	17 min

Nearby

High Surf Advisories in Virginia, 2018 High Surf Advisories in Maryland, 2018 High Surf Advisories in North Carolina, 2018 Every high surf advisory in 2018

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.