Alert archive / Maryland / Special Weather Statements in 2021

Special Weather Statement, NWS Wakefield, VA

August 18, 2021Dorchester County, Maryland

NWS Wakefield, VA issued this special weather statement at Aug 18, 2021, 4:47 PM EDT for Dorchester County, Maryland. It was in force for 43 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: Aug 18, 2021, 4:47 PM EDT (20:47 UTC)
Expired: Aug 18, 2021, 5:30 PM EDT
In force: 43 min
Issued by: NWS Wakefield, VA
Hail: 0.00 in
Wind: 45

County Dorchester County, MD

The radar

The Dover AFB radar (KDOX), 71 km from the middle of the area, began a volume at 20:47 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, 8.8 hours before the alert went out and 69 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: 770 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 834 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 18, 3:39 PM EDT, 1 hour 8 minutes earlier.

Area forecast discussion, Aug 18, 3:39 PM EDT, 1 hour 8 minutes before

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Hazardous weather outlook, Aug 18, 4:01 PM EDT, 46 minutes before

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In the hours before

Special weather statement, Aug 18, 2:55 PM EDT, 1 hour 52 minutes before

Special Weather Statement
National Weather Service Wakefield VA
255 PM EDT Wed Aug 18 2021

VAZ075-076-181930-
Richmond VA-Westmoreland VA-
255 PM EDT Wed Aug 18 2021

...A strong thunderstorm will impact portions of northwestern
Richmond and central Westmoreland Counties through 330 PM EDT...

At 254 PM EDT, Doppler radar was tracking a strong thunderstorm over
Newland, or near Montross, moving northeast at 30 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

This strong thunderstorm will be near...
  Montross around 305 PM EDT.
  Coles Point around 325 PM EDT.

Other locations impacted by this storm include Lerty, Stratford Hall,
Currioman Landing, Singerly, Erica, Foneswood, Westmoreland State,
Templeman and Mount Holly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Strong wind gusts are possible with these storms. These wind gusts
are capable of knocking down tree limbs, small or weakened trees, and
blowing around trash cans, potted plants, lawn furniture, and other
light outdoor objects.

&&

LAT...LON 3816 7684 3817 7677 3815 7661 3800 7689
      3800 7691 3802 7692 3804 7691 3807 7693
      3818 7688
TIME...MOT...LOC 1854Z 215DEG 26KT 3804 7689

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...45 MPH

Zimmerman

Special weather statement, Aug 18, 3:35 PM EDT, 1 hour 12 minutes before

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Special weather statement, Aug 18, 3:40 PM EDT, 1 hour 7 minutes before

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Special weather statement, Aug 18, 3:43 PM EDT, 1 hour 4 minutes before

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Special weather statement, Aug 18, 3:56 PM EDT, 51 minutes before

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Special weather statement, Aug 18, 4:47 PM EDT, 0 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 18, 12:49 AM EDT	Small Craft Advisory	AKQ		27 hr
Aug 18, 8:00 AM EDT	Special Weather Statement	AKQ	Mecklenburg	30 min
Aug 18, 11:58 AM EDT	Special Weather Statement	AKQ	Chesterfield	32 min
Aug 18, 2:17 PM EDT	Special Weather Statement	AKQ	Southampton, Sussex	43 min
Aug 18, 2:29 PM EDT	Special Weather Statement	AKQ	Essex	31 min
Aug 18, 2:40 PM EDT	Severe Thunderstorm Warning	AKQ	Southampton, Surry, Sussex	35 min
Aug 18, 2:55 PM EDT	Special Weather Statement	AKQ	Westmoreland	35 min
Aug 18, 3:35 PM EDT	Special Weather Statement	AKQ	Lancaster, Middlesex	25 min
Aug 18, 3:43 PM EDT	Special Weather Statement	AKQ	Essex, Richmond, Westmoreland	47 min
Aug 18, 3:56 PM EDT	Special Weather Statement	AKQ	Lancaster, Middlesex, Northumberland	49 min
Aug 18, 3:40 PM EDT	Special Weather Statement	AKQ	Bertie, Chowan	65 min
Aug 18, 3:20 PM EDT	Coastal Flood Statement	AKQ	Dorchester	11 hr

Nearby

Special Weather Statements in Maryland, 2021 Every special weather statement in 2021

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.