Alert archive / Maryland / Special Weather Statements in 2021

Special Weather Statement, NWS Wakefield, VA

August 20, 2021Dorchester County, Maryland

NWS Wakefield, VA issued this special weather statement at Aug 20, 2021, 10:23 AM EDT for Dorchester County, Maryland. It was in force for 67 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 20, 2021, 10:23 AM EDT (14:23 UTC)
Expired
Aug 20, 2021, 11:30 AM EDT
In force
67 min
Issued by
NWS Wakefield, VA

County Dorchester County, MD

The radar

The Dover AFB radar (KDOX), 83 km from the middle of the area, began a volume at 14:24 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, 2.4 hours before the alert went out and 74 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 12:00Z on 2021-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 166 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2021-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -53 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
166 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
987 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
-53 m²/s²
0-3 km storm-relative helicity
-29 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.2

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 20, 7:11 AM EDT, 3 hours 12 minutes earlier.

Area forecast discussion, Aug 20, 7:11 AM EDT, 3 hours 12 minutes before
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Hazardous weather outlook, Aug 20, 5:19 AM EDT, 5 hours 4 minutes before
Hazardous Weather Outlook
National Weather Service Wakefield VA
519 AM EDT Fri Aug 20 2021

MDZ021>023-VAZ061-062-064-075>078-085-510-511-517>522-210930-
Dorchester-Wicomico-Somerset-Cumberland-Goochland-Caroline-
Westmoreland-Richmond-Northumberland-Lancaster-Middlesex-
Eastern Louisa-Western Hanover-Western King William-
Eastern King William-Western King and Queen-Eastern King and Queen-
Western Essex-Eastern Essex-
519 AM EDT Fri Aug 20 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH THIS AFTERNOON...

This Hazardous Weather Outlook is for southeast Maryland, central
Virginia, east central Virginia, eastern Virginia and north central
Virginia.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

Showers and thunderstorms have the potential to produce locally
heavy rainfall, as an upper level trough approaches the region.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

MDZ024-NCZ015>017-030>032-VAZ048-060-065>067-079-509-210930-
Inland Worcester-Pasquotank-Camden-Western Currituck-Bertie-Chowan-
Perquimans-Fluvanna-Prince Edward-Mecklenburg-Lunenburg-Nottoway-
Brunswick-Western Louisa-
519 AM EDT Fri Aug 20 2021

This Hazardous Weather Outlook is for southeast Maryland, northeast
North Carolina, central Virginia and south central Virginia.

.DAY ONE...Today and tonight.

Showers and thunderstorms have the potential to produce locally
heavy rainfall, as an upper level trough approaches the region.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ012>014-VAZ068-069-080>084-086>090-092-093-095>097-512>516-
523>525-210930-
Northampton-Hertford-Gates-Amelia-Powhatan-Dinwiddie-Prince George-
Charles City-New Kent-Gloucester-Mathews-Greensville-Sussex-Surry-
James City-Southampton-Isle of Wight-Norfolk/Portsmouth-Suffolk-
Chesapeake-Eastern Hanover-Western Chesterfield-
Eastern Chesterfield (Including Col. Heights)-
Western Henrico (Including the City of Richmond)-Eastern Henrico-
York-Newport News-Hampton/Poquoson-
519 AM EDT Fri Aug 20 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

This Hazardous Weather Outlook is for northeast North Carolina,
central Virginia, east central Virginia, eastern Virginia, south
central Virginia and southeast Virginia.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

Showers and thunderstorms have the potential to produce locally
heavy rainfall, as an upper level trough approaches the region.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

VAZ098-210930-
Virginia Beach-
519 AM EDT Fri Aug 20 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...
...BEACH HAZARDS STATEMENT IN EFFECT THROUGH SATURDAY EVENING...

This Hazardous Weather Outlook is for southeast Virginia.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Beach Hazards Statement.
   Flash Flood Watch.

Showers and thunderstorms have the potential to produce locally
heavy rainfall, as an upper level trough approaches the region.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Beach Hazards Statement.

An increased threat of rip currents is expected Friday into the
weekend due to swell from Tropical Storm Henri.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

MDZ025-NCZ102-VAZ099-100-210930-
Maryland Beaches-Eastern Currituck-Accomack-Northampton-
519 AM EDT Fri Aug 20 2021

...BEACH HAZARDS STATEMENT IN EFFECT THROUGH SATURDAY EVENING...

This Hazardous Weather Outlook is for southeast Maryland, northeast
North Carolina, eastern Virginia and southeast Virginia.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Beach Hazards Statement.

Showers and thunderstorms have the potential to produce locally
heavy rainfall, as an upper level trough approaches the region.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Beach Hazards Statement.

An increased threat of rip currents is expected Friday into the
weekend due to swell from Tropical Storm Henri.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

In the hours before

Local storm report, Aug 20, 4:53 AM EDT, 5 hours 30 minutes before
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Special weather statement, Aug 20, 5:18 AM EDT, 5 hours 5 minutes before
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Local storm report, Aug 20, 5:53 AM EDT, 4 hours 30 minutes before
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Special weather statement, Aug 20, 6:15 AM EDT, 4 hours 8 minutes before
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Special weather statement, Aug 20, 10:23 AM EDT, 0 minutes before
Special Weather Statement
National Weather Service Wakefield VA
1023 AM EDT Fri Aug 20 2021

MDZ021-023-VAZ077-201530-
Dorchester-Somerset-Northumberland-
1023 AM EDT Fri Aug 20 2021

...A LINE OF SHOWERS AND THUNDERSTORMS WILL AFFECT DORCHESTER
COUNTY...

At 1022 AM EDT, radar indicated strong thunderstorms were located
along a line extending from north of Taylors Island to Lewisetta.
Movement was east at 20 mph.

Winds 30 mph and very heavy rainfall are possible with these storms.

These storms will be near...
  Taylors Island around 1030 AM EDT.
  University Of Maryland Center For Environmental Studies around
  1055 AM EDT.
  Cambridge around 1105 AM EDT.
  Secretary around 1125 AM EDT.
  Hurlock around 1130 AM EDT.

Other locations impacted by these storms include Madison, Taylors
Island, Woolford, Andrews, Hudson, East New Market, Church Creek,
Bucktown, Wingate and Linkwood.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3812 7594 3837 7601 3831 7606 3790 7604
      3787 7591 3789 7607 3790 7605 3827 7607
      3839 7623 3831 7624 3832 7625 3831 7625
      3849 7634 3848 7633 3853 7620 3863 7629
      3857 7603 3870 7584
TIME...MOT...LOC 1422Z 268DEG 18KT 3856 7634 3803 7644

jo

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 11:56 PM EDTSpecial Weather StatementAKQNottoway64 min
Aug 20, 12:43 AM EDTAreal Flood AdvisoryAKQLunenburg, Nottoway, Prince Edward3 hr
Aug 20, 12:50 AM EDTSpecial Weather StatementAKQBrunswick55 min
Aug 20, 1:48 AM EDTAreal Flood AdvisoryAKQChesterfield, Goochland, Henrico, Powhatan, City of Richmond117 min
Aug 20, 2:07 AM EDTSpecial Weather StatementAKQDinwiddie, City of Colonial Heights, City of Petersburg53 min
Aug 20, 2:09 AM EDTSpecial Weather StatementAKQAmelia, Lunenburg, Nottoway66 min
Aug 20, 2:15 AM EDTSpecial Weather StatementAKQEssex, King William, Richmond60 min
Aug 20, 2:46 AM EDTSpecial Weather StatementAKQCharles City, Henrico, James City, King and Queen, New Kent, Prince George and 4 more59 min
Aug 20, 2:59 AM EDTSmall Craft AdvisoryAKQ51 hr
Aug 20, 3:11 AM EDTAreal Flood AdvisoryAKQCharles City, Chesterfield, Henrico, Prince George, City of Colonial Heights, City of Hopewell and 1 more3 hr
Aug 20, 3:40 AM EDTFlash Flood WarningAKQCharles City, Chesterfield, Prince George, City of Colonial Heights, City of Hopewell, City of Petersburg3 hr
Aug 20, 4:00 AM EDTSpecial Weather StatementAKQEssex, Gloucester, James City, King and Queen, King William, Lancaster and 6 more60 min
Aug 20, 4:15 AM EDTRiver Flood WarningAKQCharles City, New Kent3 days
Aug 20, 4:41 AM EDTSpecial Marine WarningAKQ94 min
Aug 20, 5:18 AM EDTSpecial Weather StatementAKQAccomack57 min
Aug 20, 6:05 AM EDTSpecial Marine WarningAKQ85 min
Aug 20, 12:28 PM EDTSpecial Weather StatementAKQCurrituck47 min
Aug 20, 1:31 PM EDTSpecial Weather StatementAKQCurrituck29 min
Aug 20, 2:45 PM EDTSpecial Weather StatementAKQCurrituck45 min
Aug 20, 3:51 PM EDTAreal Flood AdvisoryAKQCurrituck3 hr
Aug 20, 4:01 PM EDTSpecial Weather StatementAKQCurrituck74 min
Aug 20, 7:49 PM EDTAreal Flood AdvisoryAKQCurrituck3 hr
Aug 19, 10:01 PM EDTSpecial Weather StatementAKQDorchester, Somerset59 min
Aug 19, 10:59 PM EDTSpecial Weather StatementAKQDorchester, Wicomico61 min
Aug 20, 12:07 AM EDTSpecial Weather StatementAKQWorcester53 min
Aug 20, 6:15 AM EDTSpecial Weather StatementAKQWorcester45 min
Aug 20, 12:01 PM EDTAreal Flood AdvisoryAKQDorchester119 min

Nearby

Special Weather Statements in Maryland, 2021Every 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.