Severe Thunderstorm Watch 403

Issued

Jul 29, 2021, 3:13 PM EDT (19:13 UTC)

Expired

Jul 29, 2021, 10:00 PM EDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Cincinnati radar (KILN), 119 km from the middle of the area, began a volume at 19:17 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

5%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

30%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 1387 Severe potential...watch possibleJul 29, 11:58 AM EDT
• Mesoscale Discussion 1389 Severe potential...watch possibleJul 29, 2:48 PM EDT
• Mesoscale Discussion 1392 Severe thunderstorm watch 403Jul 29, 6:34 PM EDT

780 
WWUS20 KWNS 291911
SEL3  
SPC WW 291911
INZ000-KYZ000-OHZ000-PAZ000-WVZ000-300200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 403
NWS Storm Prediction Center Norman OK
315 PM EDT Thu Jul 29 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Eastern Indiana
  Northeast Kentucky
  Southern Ohio
  Southwest Pennsylvania
  Northern West Virginia

* Effective this Thursday afternoon and evening from 315 PM until
  1000 PM EDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph likely
  Isolated large hail events to 1.5 inches in diameter possible

SUMMARY...Thunderstorms are developing along a weak front stretching
across central Ohio into western Pennsylvania.  Those storms will
spread southward this afternoon and early evening, posing a risk of
damaging wind gusts and hail.

The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 50 miles west northwest
of Cincinnati OH to 45 miles east of Latrobe PA. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU3).

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 401...WW 402...

AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
30030.

...Hart

Severe Thunderstorm Watches in Ohio, 2021Severe Thunderstorm Watches in West Virginia, 2021Severe Thunderstorm Watches in Kentucky, 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.