Alert archive / Virginia / Special Weather Statements in 2017

Special Weather Statement, NWS Wakefield, VA

May 1, 2017Amelia County, Chesterfield County, Nottoway County, Virginia

NWS Wakefield, VA issued this special weather statement at May 1, 2017, 8:13 PM EDT for Amelia County, Chesterfield County, Nottoway County, Virginia. It was in force for 47 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: May 1, 2017, 8:13 PM EDT (00:13 UTC)
Expired: May 1, 2017, 9:00 PM EDT
In force: 47 min
Issued by: NWS Wakefield, VA

Counties Amelia County, VA, Chesterfield County, VA, Nottoway County, VA

The radar

The Norfolk radar (KAKQ), 82 km from the middle of the area, began a volume at 00:16 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 00:00Z, 0.2 hours before the alert went out and 189 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: 403 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 913 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 195 m²/s²
0-3 km storm-relative helicity: 304 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 1:37 AM EDT	Special Weather Statement	AKQ	City of Chesapeake, City of Norfolk, City of Portsmouth, City of Suffolk, City of Virginia Beach	38 min
May 2, 3:14 AM EDT	Special Weather Statement	AKQ	City of Chesapeake, City of Suffolk, City of Virginia Beach	46 min
May 2, 3:57 AM EDT	Special Marine Warning	AKQ		63 min
May 2, 3:59 AM EDT	Special Weather Statement	AKQ	City of Virginia Beach	46 min
May 2, 6:28 PM EDT	Small Craft Advisory	AKQ		22 hr

Nearby

Special Weather Statements in Virginia, 2017 Every special weather statement in 2017

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.