Special Marine Warning 310, NWS Baltimore/Washington

Issued

Sep 1, 2021, 4:58 PM EDT (20:58 UTC)

Expired

Sep 1, 2021, 5:29 PM EDT

In force

31 min

Issued by

NWS Baltimore/Washington

Area

Storm-based polygon

Hail

0.0 in

Wind

34.0 mph

The Dover AFB radar (KDOX), 82 km from the middle of the area, began a volume at 21:02 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.

128 
WHUS51 KLWX 012058
SMWLWX
ANZ531-532-539-012230-
/O.NEW.KLWX.MA.W.0310.210901T2058Z-210901T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Baltimore MD/Washington DC
458 PM EDT Wed Sep 1 2021

The National Weather Service in Sterling Virginia has issued a

* Special Marine Warning for...
  Chesapeake Bay from Pooles Island to Sandy Point MD...
  Chesapeake Bay from Sandy Point to North Beach MD...
  Chester River to Queenstown MD...

* Until 630 PM EDT.

* At 458 PM EDT, a strong thunderstorm capable of producing
  waterspouts was located over Greenbury Point, moving northeast at
  35 knots.

  HAZARD...Wind gusts 34 knots or greater and waterspouts possible.

  SOURCE...Radar indicated.

  IMPACT...Boaters in small craft could be thrown overboard by 
           suddenly higher winds and waves capsizing their vessel. 
           Waterspouts can easily overturn boats and create locally 
           hazardous seas.

* Locations impacted include...
  Pinehurst, Magothy River, Gibson Island, Bodkin Point, Greenbury
  Point, Love Point, Naval Academy, Sandy Point State Park, Baltimore
  Light, Severn River, Chesapeake Bay Bridge, Sevenfoot Knoll and
  Annapolis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 700 PM EDT for central
Maryland...and the adjacent coastal waters.

Move to safe harbor until hazardous weather passes.

&&

LAT...LON 3918 7627 3915 7628 3913 7625 3910 7624
      3905 7623 3903 7624 3901 7622 3899 7628
      3904 7630 3902 7632 3900 7632 3897 7634
      3894 7645 3897 7649 3899 7649 3902 7640
      3905 7646 3913 7645 3914 7648 3921 7642
TIME...MOT...LOC 2058Z 229DEG 34KT 3900 7644 

WATERSPOUT...POSSIBLE
HAIL...0.00IN
WIND...>34KTS

$$

MSS

410 
FZUS71 KLWX 012129
MWSLWX

Marine Weather Statement
National Weather Service Baltimore MD/Washington DC
529 PM EDT Wed Sep 1 2021

ANZ531-532-539-012138-
/O.CAN.KLWX.MA.W.0310.000000T0000Z-210901T2230Z/
529 PM EDT Wed Sep 1 2021

...THE SPECIAL MARINE WARNING IS CANCELLED...

The affected areas were... 
Chesapeake Bay from Pooles Island to Sandy Point MD...
Chesapeake Bay from Sandy Point to North Beach MD...
Chester River to Queenstown MD...

The thunderstorm has moved out of the area and no longer poses a
significant threat to boaters.

A Tornado Watch remains in effect until 700 PM EDT for central
Maryland...and the adjacent coastal waters.

LAT...LON 3918 7627 3915 7628 3913 7625 3910 7624
      3905 7623 3903 7624 3901 7622 3899 7628
      3904 7630 3902 7632 3900 7632 3897 7634
      3894 7645 3897 7649 3899 7649 3902 7640
      3905 7646 3913 7645 3914 7648 3921 7642
TIME...MOT...LOC 2127Z 229DEG 34KT 3919 7616 

$$

MSS

Special Marine Warnings in Virginia, 2021Every special marine warning in 2021

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.