Alert archive / Virginia / Special Weather Statements in 2017

Special Weather Statement, NWS Wakefield, VA

July 1, 2017Accomack County, Virginia

NWS Wakefield, VA issued this special weather statement at Jul 1, 2017, 10:49 PM EDT for Accomack County, Virginia. It was in force for 41 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 1, 2017, 10:49 PM EDT (02:49 UTC)
Expired
Jul 1, 2017, 11:30 PM EDT
In force
41 min
Issued by
NWS Wakefield, VA

County Accomack County, VA

The radar

The Dover AFB radar (KDOX), 128 km from the middle of the area, began a volume at 02:52 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 00:00Z, 2.8 hours before the alert went out and 34 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2017-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 717 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2017-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
717 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
983 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
79 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.3

Open this sounding in Storm Lab

The text

As transmitted.

996 
WWUS81 KAKQ 020249
SPSAKQ

Special Weather Statement
National Weather Service Wakefield VA
1049 PM EDT SAT JUL 1 2017

VAZ099-020330-
Accomack-
1049 PM EDT SAT JUL 1 2017

...A THUNDERSTORM WITH HEAVY RAIN WILL AFFECT CENTRAL ACCOMACK
COUNTY...

At 1049 PM EDT, a thunderstorm with heavy rain was located 11 miles
east of Onley, or 18 miles northeast of Exmore, moving east at 20
mph.

Rainfall amounts of 1 to 2 inches are possible with this storm.

Locations impacted include...
Onancock, Onley, Accomac, Melfa, Wachapreague, Keller, Locustville,
Harborton, Pungoteague and Tasley.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike more than 10 miles away from a thunderstorm.
Seek a safe shelter inside a building or vehicle.

LAT...LON 3770 7552 3769 7553 3767 7554 3765 7554
      3763 7555 3760 7556 3762 7590 3773 7589
      3774 7587 3775 7587 3780 7547
TIME...MOT...LOC 0249Z 278DEG 19KT 3766 7552 

$$

05

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 8:26 PM EDTSpecial Weather StatementAKQRichmond, Westmoreland49 min
Jul 1, 9:15 PM EDTSpecial Weather StatementAKQNorthumberland45 min
Jul 1, 9:59 PM EDTSpecial Weather StatementAKQNorthumberland46 min
Jul 1, 10:04 PM EDTSpecial Weather StatementAKQAccomack41 min
Jul 2, 2:31 PM EDTSpecial Weather StatementAKQCity of Virginia Beach29 min
Jul 2, 3:00 PM EDTSpecial Weather StatementAKQCity of Virginia Beach30 min
Jul 2, 4:37 PM EDTSpecial Weather StatementAKQCity of Chesapeake38 min
Jul 2, 4:42 PM EDTSpecial Marine WarningAKQ63 min
Jul 2, 3:28 PM EDTSpecial Weather StatementAKQCurrituck32 min
Jul 2, 4:05 PM EDTSpecial Weather StatementAKQCurrituck55 min
Jul 2, 4:47 PM EDTSpecial Weather StatementAKQCurrituck43 min
Jul 2, 5:30 PM EDTSpecial Weather StatementAKQCurrituck60 min
Jul 2, 7:14 PM EDTSpecial Weather StatementAKQPasquotank46 min
Jul 1, 10:46 PM EDTSpecial Weather StatementAKQDorchester44 min

Nearby

Special Weather Statements in Virginia, 2017Every 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.