Severe Thunderstorm Watch 97

Issued

Apr 21, 2021, 12:28 PM EDT (16:28 UTC)

Expired

Apr 21, 2021, 5:28 PM EDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Brookhaven radar (KOKX), 75 km from the middle of the area, began a volume at 16:30 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.

Two or more tornadoes

10%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

10%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 402 Severe potential...watch possibleApr 21, 11:49 AM EDT
• Mesoscale Discussion 403 Severe potential...watch possibleApr 21, 12:22 PM EDT
• Mesoscale Discussion 404 Severe thunderstorm watch 97Apr 21, 2:56 PM EDT

256 
WWUS20 KWNS 211626
SEL7  
SPC WW 211626
CTZ000-DEZ000-MAZ000-MDZ000-NJZ000-NYZ000-PAZ000-CWZ000-212200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 97
NWS Storm Prediction Center Norman OK
1230 PM EDT Wed Apr 21 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Connecticut
  Delaware
  Western Massachusetts
  Eastern Maryland
  New Jersey
  Southeast New York
  Eastern Pennsylvania
  Coastal Waters

* Effective this Wednesday afternoon and evening from 1230 PM
  until 600 PM EDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph possible
  Isolated large hail events to 1 inch in diameter possible

SUMMARY...Fast-moving thunderstorms will continue to develop and
spread east-northeastward across the region this afternoon with
damaging winds and some hail as the primary concerns.

The severe thunderstorm watch area is approximately along and 55
statute miles east and west of a line from 35 miles north northeast
of Westfield MA to 30 miles south southeast of Patuxent River MD.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU7).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few
cumulonimbi with maximum tops to 400. Mean storm motion vector
21035.

...Guyer

Severe Thunderstorm Watches in New Jersey, 2021Severe Thunderstorm Watches in New York, 2021Severe Thunderstorm Watches in Maryland, 2021Every severe thunderstorm watch 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.