Severe Thunderstorm Watch 382

Issued

Jul 17, 2021, 1:13 PM EDT (17:13 UTC)

Expired

Jul 17, 2021, 11:00 PM EDT

In force

10 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Philadelphia radar (KDIX), 137 km from the middle of the area, began a volume at 17:14 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

20%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1304 Severe potential...severe thunderstorm watch likelyJul 17, 12:00 PM EDT
• Mesoscale Discussion 1307 Severe thunderstorm watch 382Jul 17, 3:02 PM EDT
• Mesoscale Discussion 1308 Severe thunderstorm watch 382Jul 17, 4:38 PM EDT
• Mesoscale Discussion 1310 Severe thunderstorm watch 382Jul 17, 6:54 PM EDT
• Mesoscale Discussion 1312 Severe thunderstorm watch 382Jul 17, 10:02 PM EDT

604 
WWUS20 KWNS 171711
SEL2  
SPC WW 171711
CTZ000-DCZ000-DEZ000-MAZ000-MDZ000-NJZ000-NYZ000-PAZ000-VAZ000-WVZ00
0-CWZ000-180300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 382
NWS Storm Prediction Center Norman OK
110 PM EDT Sat Jul 17 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Connecticut
  District Of Columbia
  Delaware
  western Massachusetts
  Maryland
  New Jersey
  southeast New York
  central and eastern Pennsylvania
  northern Virginia
  northeast West Virginia
  Coastal Waters

* Effective this Saturday afternoon and evening from 110 PM until
  1100 PM EDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph likely
  A tornado or two possible

SUMMARY...Storms will continue to develop and intensify within the
destabilizing warm sector across a portion of the Middle Atlantic
and Northeast States this afternoon and evening. Mostly multicells
and some marginal supercell structures are expected with storms
evolving into lines and bowing segments capable of mainly scattered
wind damage.

The severe thunderstorm watch area is approximately along and 125
statute miles east and west of a line from 30 miles east northeast
of Binghamton NY to 50 miles south southwest of Washington DC. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU2).

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 500. Mean storm motion vector
26035.

...Dial

Severe Thunderstorm Watches in Pennsylvania, 2021Severe Thunderstorm Watches in Virginia, 2021Severe Thunderstorm Watches in New York, 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.