Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 32, NWS Pittsburgh, PA

May 21, 2022Allegheny County, Butler County, Westmoreland County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at May 21, 2022, 8:09 PM EDT for Allegheny County, Butler County, Westmoreland County, Pennsylvania. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 21, 2022, 8:09 PM EDT (00:09 UTC)
Expired: May 21, 2022, 8:45 PM EDT
In force: 36 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Allegheny County, PA, Butler County, PA, Westmoreland County, PA

The radar

The Pittsburgh radar (KPBZ), 37 km from the middle of the area, began a volume at 00:09 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 21, 2:47 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 0.2 hours before the alert went out and 32 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 941 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1691 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pittsburgh, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 21, 7:58 PM EDT, 11 minutes earlier.

Area forecast discussion, May 21, 7:58 PM EDT, 11 minutes before

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Hazardous weather outlook, May 21, 2:50 PM EDT, 5 hours 19 minutes before

Hazardous Weather Outlook
National Weather Service Pittsburgh PA
250 PM EDT Sat May 21 2022

OHZ039>041-048>050-057-058-PAZ007-008-013-014-020-WVZ001-221900-
Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH-
Muskingum-Guernsey-Mercer-Venango-Lawrence-Butler-Beaver-Hancock-
250 PM EDT Sat May 21 2022

...SEVERE THUNDERSTORM WATCH 255 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for east central Ohio, western
Pennsylvania and northern West Virginia.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

OHZ059-068-069-PAZ009-015-016-021>023-029-073-WVZ002>004-221900-
Belmont-Noble-Monroe-Forest-Clarion-Jefferson PA-Allegheny-Armstrong-
Indiana-Washington-Westmoreland-Brooke-Ohio-Marshall-
250 PM EDT Sat May 21 2022

This Hazardous Weather Outlook is for east central Ohio, western
Pennsylvania and the northern panhandle of West Virginia.

.DAY ONE...This afternoon and tonight.

Isolated severe thunderstorms are possible this evening. The main
severe threat will be damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ031-074>076-WVZ012-021-509>514-221900-
Greene-Higher Elevations of Westmoreland-Fayette-
Higher Elevations of Fayette-Wetzel-Marion-Monongalia-
Ridges of Eastern Monongalia and Northwestern Preston-Preston-
Eastern Preston-Western Tucker-Eastern Tucker-
250 PM EDT Sat May 21 2022

This Hazardous Weather Outlook is for southwest Pennsylvania and
northern West Virginia.

.DAY ONE...This afternoon and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, May 21, 6:09 PM EDT, 2 hours before

Special Weather Statement
National Weather Service Pittsburgh PA
609 PM EDT Sat May 21 2022

OHZ039-048-212245-
Tuscarawas OH-Coshocton OH-
609 PM EDT Sat May 21 2022

...A STRONG THUNDERSTORM WILL IMPACT EAST CENTRAL COSHOCTON AND
CENTRAL TUSCARAWAS COUNTIES THROUGH 645 PM EDT...

At 609 PM EDT, Doppler radar was tracking a strong thunderstorm near
Sugarcreek, or near Dover, moving northeast at 30 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
New Philadelphia, Dover, Newcomerstown, Gnadenhutten, Tuscarawas,
Bolivar, Midvale, Mineral City, Port Washington, Barnhill, Roswell,
and Parral.

This includes Interstate 77 in Ohio between mile markers 64 and 94.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
east central Ohio.

&&

LAT...LON 4065 8149 4066 8147 4067 8146 4067 8145
      4066 8144 4065 8145 4065 8132 4057 8132
      4057 8130 4027 8145 4027 8169
TIME...MOT...LOC 2209Z 209DEG 26KT 4054 8160

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

RACKLEY

Special weather statement, May 21, 6:40 PM EDT, 1 hour 29 minutes before

Special Weather Statement
National Weather Service Pittsburgh PA
640 PM EDT Sat May 21 2022

OHZ039-040-049-058-059-212315-
Guernsey OH-Tuscarawas OH-Harrison OH-Belmont OH-Carroll OH-
640 PM EDT Sat May 21 2022

...STRONG THUNDERSTORMS WILL IMPACT HARRISON...NORTHEASTERN
GUERNSEY...CARROLL...NORTHWESTERN BELMONT AND EASTERN TUSCARAWAS
COUNTIES THROUGH 715 PM EDT...

At 640 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Waynesburg to near Freeport. Movement was
northeast at 25 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
New Philadelphia, Uhrichsville, Cadiz, Carrollton, Freeport, Minerva,
Dennison, Augusta, Gnadenhutten, Antrim, Malvern, and Tuscarawas.

This includes Interstate 70 in Ohio between mile markers 185 and 208.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
east central Ohio.

&&

LAT...LON 4065 8138 4065 8124 4072 8124 4073 8114
      4073 8095 4005 8105 3994 8149
TIME...MOT...LOC 2240Z 242DEG 23KT 4073 8126 4016 8134

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

RACKLEY

Special weather statement, May 21, 6:54 PM EDT, 1 hour 15 minutes before

Special Weather Statement
National Weather Service Pittsburgh PA
654 PM EDT Sat May 21 2022

OHZ041-212330-
Columbiana OH-
654 PM EDT Sat May 21 2022

...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN COLUMBIANA COUNTY
THROUGH 730 PM EDT...

At 654 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Alliance to Minerva. Movement was east at
15 mph.

HAZARD...Wind gusts up to 50 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Salem, Hanoverton, New Garden, East Rochester, North Georgetown,
Winona, Homeworth, and Guilford Lake State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
east central Ohio.

&&

LAT...LON 4073 8089 4073 8109 4088 8109 4090 8108
      4090 8090 4093 8089 4093 8082
TIME...MOT...LOC 2254Z 255DEG 12KT 4090 8108 4074 8113

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

RACKLEY

Special weather statement, May 21, 7:22 PM EDT, 47 minutes before

Special Weather Statement
National Weather Service Pittsburgh PA
722 PM EDT Sat May 21 2022

OHZ040-041-049-050-WVZ001-002-212345-
Jefferson OH-Harrison OH-Columbiana OH-Carroll OH-Brooke WV-
Hancock WV-
722 PM EDT Sat May 21 2022

...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN HARRISON...
JEFFERSON...COLUMBIANA...SOUTHEASTERN CARROLL...BROOKE AND HANCOCK
COUNTIES THROUGH 745 PM EDT...

At 721 PM EDT, the public reported strong thunderstorms along a line
extending from Salem to 7 miles northeast of Cadiz. Movement was
northeast at 40 mph.

HAZARD...Wind gusts up to 40 mph and penny size hail.

SOURCE...Public.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Weirton, Steubenville, Salem, East Liverpool, Columbiana, East
Palestine, Wellsville, Cadiz, Toronto, Calcutta, Wintersville, and
Mingo Junction.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
east central Ohio...western Pennsylvania...and northern West
Virginia.

&&

LAT...LON 4090 8082 4090 8052 4037 8052 4025 8099
      4093 8088 4093 8082
TIME...MOT...LOC 2321Z 220DEG 36KT 4093 8084 4036 8094

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

RACKLEY

Local storm report, May 21, 7:23 PM EDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
723 PM EDT SAT MAY 21 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0715 PM     HAIL             HANOVERTON              40.76N  80.94W
05/21/2022  E0.75 INCH       COLUMBIANA         OH   TRAINED SPOTTER

            MOSTLY PEA-SIZED HAIL WITH A FEW STONES TO DIME SIZE

&&

EVENT NUMBER PBZ2202275

CL

Special weather statement, May 21, 7:34 PM EDT, 35 minutes before

Special Weather Statement
National Weather Service Pittsburgh PA
734 PM EDT Sat May 21 2022

PAZ007-013-220000-
Lawrence PA-Mercer PA-
734 PM EDT Sat May 21 2022

...STRONG THUNDERSTORMS WILL IMPACT MERCER AND LAWRENCE COUNTIES
THROUGH 800 PM EDT...

At 733 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Cortland to near Salem, Ohio. Movement
was east at 20 mph.

HAZARD...Wind gusts up to 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
New Castle, Hermitage, Sharon, Grove City, Sharpsville, Ellwood City,
Greenville, Farrell, New Wilmington, Oakwood, New Castle Northwest,
and Mercer.

This includes the following highways...
  Pennsylvania Turnpike between mile markers 1 and 8.
  Interstate 79 in Pennsylvania between mile markers 106 and 137.
  Interstate 80 in Pennsylvania between mile markers 0 and 27.
  Interstate 376 in Pennsylvania between mile markers 4 and 14.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
east central Ohio...and western, northwestern and west central
Pennsylvania.

&&

LAT...LON 4117 8000 4100 8016 4085 8016 4085 8052
      4149 8052 4148 8013 4149 8000
TIME...MOT...LOC 2333Z 265DEG 19KT 4132 8069 4094 8078

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

RACKLEY

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 21, 8:04 PM EDT	Special Weather Statement	PBZ	Allegheny, Beaver, Butler, Lawrence, Washington	26 min
May 21, 8:21 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Venango	24 min
May 21, 8:31 PM EDT	Special Weather Statement	PBZ	Armstrong, Westmoreland	29 min
May 21, 8:41 PM EDT	Special Weather Statement	PBZ	Clarion, Forest, Jefferson	34 min
May 21, 9:13 PM EDT	Special Weather Statement	PBZ	Forest	32 min
May 21, 9:26 PM EDT	Special Weather Statement	PBZ	Jefferson	19 min
May 21, 10:23 PM EDT	Special Weather Statement	PBZ	Tucker	37 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2022 Every severe thunderstorm warning in 2022

Sources

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.