Severe Thunderstorm Watch 372

Issued

Jul 11, 2021, 2:40 PM EDT (18:40 UTC)

Expired

Jul 11, 2021, 11:00 PM EDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

55 kt

The Pittsburgh radar (KPBZ), 61 km from the middle of the area, began a volume at 18:41 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

10%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 1256 Severe potential...watch likelyJul 11, 2:05 PM EDT
• Mesoscale Discussion 1259 Severe thunderstorm watch 372Jul 11, 5:41 PM EDT
• Mesoscale Discussion 1263 Severe thunderstorm watch 372Jul 11, 8:58 PM EDT

771 
WWUS20 KWNS 111837
SEL2  
SPC WW 111837
MDZ000-PAZ000-WVZ000-120100-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 372
NWS Storm Prediction Center Norman OK
240 PM EDT Sun Jul 11 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Western Maryland
  Western and Central Pennsylvania
  Northern West Virginia

* Effective this Sunday afternoon and evening from 240 PM until
  900 PM EDT.

* Primary threats include...
  Scattered damaging wind gusts to 65 mph possible
  A tornado or two possible

SUMMARY...Strong to severe thunderstorms are expected to develop
across the region through the afternoon. A moist air mass, moderate
instability, and seasonally strong deep-layer winds will support
organized storms including some supercells. Damaging winds should be
the most common risk, but a tornado could also occur, particularly
across Pennsylvania where low-level shear is maximized near the warm
front.

The severe thunderstorm watch area is approximately along and 80
statute miles north and south of a line from 40 miles southwest of
Wheeling WV to 45 miles east of State College PA. 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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 371...

AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 55 knots. A few
cumulonimbi with maximum tops to 500. Mean storm motion vector
24025.

...Guyer

Severe Thunderstorm Watches in Pennsylvania, 2021Severe Thunderstorm Watches in West Virginia, 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.