Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 29, NWS Pittsburgh, PA

June 13, 2021Allegheny County, Washington County, Westmoreland County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 13, 2021, 5:59 PM EDT for Allegheny County, Washington County, Westmoreland County, Pennsylvania. It was in force for 46 min. 19 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 13, 2021, 5:59 PM EDT (21:59 UTC)
Expired: Jun 13, 2021, 6:45 PM EDT
In force: 46 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Allegheny County, PA, Washington County, PA, Westmoreland County, PA

The radar

The Pittsburgh radar (KPBZ), 25 km from the middle of the area, began a volume at 22:01 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.

What was reported inside it

Time	Report	Where	Remark
Jun 13, 6:00 PM EDT	FUNNEL CLOUD	1 Se Shaler Township, PA
Jun 13, 6:00 PM EDT	TSTM WND DMG	Millvale, PA	A FEW TREES AND NUMEROUS LARGE BRANCHES DOWN.
Jun 13, 6:00 PM EDT	TSTM WND DMG	Mount Washington, PA	REPORT OF LARGE TREE LIMB DOWN ON GRANDVIEW AVEN IN MOUNT WASHINGTON.
Jun 13, 6:00 PM EDT	HAIL 0.75	Nw Oakland, PA
Jun 13, 6:05 PM EDT	HAIL 0.75	Lawrenceville, PA
Jun 13, 6:10 PM EDT	TSTM WND DMG	Lawrenceville, PA	LARGE TREE LIMB SNAPPED OFF NEAR PITTSBURGH FIRE BUREAU STATION 6.
Jun 13, 6:10 PM EDT	TSTM WND DMG	Pittsburgh, PA	NUMEROUS REPORTS OF DAMAGE TO STRUCTURES WITHIN THE CITY.
Jun 13, 6:11 PM EDT	TSTM WND DMG	Lawrenceville, PA	LARGE TREE UPROOTED ALONG MINTWOOD STREET.
Jun 13, 6:15 PM EDT	TSTM WND DMG	1 W Squirrel Hill, PA	PICTURE OF TREE ONTO HOUSE PLUS REPORT OF ADDITIONAL LARGE BRANCHES DOWN.
Jun 13, 6:15 PM EDT	HAIL 0.88	Squirrel Hill, PA
Jun 13, 6:15 PM EDT	HAIL 1	1 W Squirrel Hill, PA
Jun 13, 6:15 PM EDT	HAIL 1	Squirrel Hill, PA
Jun 13, 6:16 PM EDT	HAIL 0.75	Swissvale, PA
Jun 13, 6:20 PM EDT	HAIL 0.75	Swissvale, PA
Jun 13, 6:24 PM EDT	HAIL 1.25	3 Nw Edgewood, PA
Jun 13, 6:25 PM EDT	TSTM WND DMG	Shaler Township, PA	TREES REPORTED DOWN AND SMALL HAIL.
Jun 13, 6:30 PM EDT	TSTM WND DMG	Lawrenceville, PA	REPORT OF MULTIPLE TREES DOWN. TIME ESTIMATED BASED ON RADAR.
Jun 13, 6:30 PM EDT	HAIL 0.75	N Hazelwood, PA
Jun 13, 6:30 PM EDT	HAIL 0.75	Point Breeze, PA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 13, 12:50 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 10.0 hours before the alert went out and 14 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: 1001 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 944 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

711 
WUUS51 KPBZ 132159
SVRPBZ
PAC003-125-129-132245-
/O.NEW.KPBZ.SV.W.0029.210613T2159Z-210613T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pittsburgh PA
559 PM EDT Sun Jun 13 2021

The National Weather Service in Pittsburgh has issued a

* Severe Thunderstorm Warning for...
  East central Washington County in southwestern Pennsylvania...
  Eastern Allegheny County in southwestern Pennsylvania...
  West central Westmoreland County in southwestern Pennsylvania...

* Until 645 PM EDT.

* At 558 PM EDT, a severe thunderstorm was located over Etna, or near
  Ross Township, moving southeast at 25 mph.

  HAZARD...Wind gusts to 60 mph and quarter-size hail.

  SOURCE...Radar.

  IMPACT...Minor hail damage to vehicles is possible. Expect wind 
           damage to trees and power lines, resulting in some power 
           outages.

* Locations impacted include...
  Pittsburgh...                     Penn Hills...
  Mount Lebanon...                  Bethel Park...
  Ross Township...                  McCandless Township...
  Monroeville...                    McKeesport...
  Franklin Park...                  Gastonville...
  Shaler Township...                Plum...

This includes the following highways...
  Pennsylvania Turnpike between mile markers 39 and 66.
  Interstate 79 in Pennsylvania between mile markers 62 and 65, and 
  near mile marker 67.	
  Interstate 376 in Pennsylvania between mile markers 65 and 84.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

Move to an interior room on the lowest floor of a building.

Please report severe weather by calling 412-262-1988, posting to 
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH. 

&&

LAT...LON 4052 8014 4064 7990 4039 7955 4016 7999
TIME...MOT...LOC 2158Z 326DEG 21KT 4050 7996 

HAIL...1.00IN
WIND...60MPH
 
$$

DS

1 follow-up statement

447 
WWUS51 KPBZ 132221
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
621 PM EDT Sun Jun 13 2021

PAC003-125-129-132245-
/O.CON.KPBZ.SV.W.0029.000000T0000Z-210613T2245Z/
Washington PA-Allegheny PA-Westmoreland PA-
621 PM EDT Sun Jun 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR EAST CENTRAL WASHINGTON...SOUTHEASTERN ALLEGHENY AND WEST CENTRAL
WESTMORELAND COUNTIES...

At 621 PM EDT, a severe thunderstorm was located over Braddock, or
near McKeesport, moving southeast at 25 mph.

HAZARD...Wind gusts to 60 mph and quarter-size hail.

SOURCE...Radar.

IMPACT...Minor hail damage to vehicles is possible. Expect wind 
         damage to trees and power lines, resulting in some power 
         outages.

Locations impacted include...
Pittsburgh...                     Penn Hills...
Mount Lebanon...                  Bethel Park...
Monroeville...                    McKeesport...
Gastonville...                    Shaler Township...
Plum...                           West Mifflin...
North Side Pittsburgh...          Baldwin...

This includes the following highways...
  Pennsylvania Turnpike between mile markers 48 and 66.
  Interstate 376 in Pennsylvania between mile markers 65 and 84.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is occurring with this storm and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

Move to an interior room on the lowest floor of a building.

Please report severe weather by calling 412-262-1988, posting to 
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH. 

&&

LAT...LON 4045 8011 4056 7980 4039 7955 4016 7999
TIME...MOT...LOC 2221Z 326DEG 21KT 4039 7986 

HAIL...1.00IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 8:24 AM EDT	Special Weather Statement	PBZ	Westmoreland	36 min
Jun 13, 8:36 AM EDT	Areal Flood Advisory	PBZ	Armstrong, Westmoreland	71 min
Jun 13, 8:51 AM EDT	Areal Flood Advisory	PBZ	Armstrong, Indiana	103 min
Jun 13, 9:02 AM EDT	Special Weather Statement	PBZ	Westmoreland	13 min
Jun 13, 9:39 AM EDT	Special Weather Statement	PBZ	Fayette	36 min
Jun 13, 10:42 AM EDT	Special Weather Statement	PBZ	Fayette	33 min
Jun 13, 1:37 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	38 min
Jun 13, 1:57 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	20 min
Jun 13, 2:08 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	33 min
Jun 13, 3:55 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer	35 min
Jun 13, 4:23 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence	37 min
Jun 13, 5:29 PM EDT	Flash Flood Warning	PBZ	Allegheny, Westmoreland	3 hr
Jun 13, 5:33 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Butler, Westmoreland	27 min
Jun 13, 5:43 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	47 min
Jun 13, 5:53 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Venango	17 min
Jun 13, 6:12 PM EDT	Special Weather Statement	PBZ	Forest	33 min
Jun 13, 6:21 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	39 min
Jun 13, 6:54 PM EDT	Areal Flood Advisory	PBZ	Allegheny, Washington, Westmoreland	2 hr
Jun 13, 6:58 PM EDT	Special Weather Statement	PBZ	Washington	47 min
Jun 13, 7:22 PM EDT	Flash Flood Warning	PBZ	Allegheny, Washington	100 min
Jun 13, 7:26 PM EDT	Special Weather Statement	PBZ	Fayette	34 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2021 Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.