Alert archive / West Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 68, NWS Pittsburgh, PA

June 21, 2021Brooke County, Ohio County, West Virginia; Allegheny County, Washington County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 21, 2021, 3:29 PM EDT for Brooke County, Ohio County, West Virginia; Allegheny County, Washington County, Pennsylvania. It was in force for 46 min. 2 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 21, 2021, 3:29 PM EDT (19:29 UTC)
Expired: Jun 21, 2021, 4:15 PM EDT
In force: 46 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Allegheny County, PA, Washington County, PA, Brooke County, WV, Ohio County, WV

The radar

The Pittsburgh radar (KPBZ), 26 km from the middle of the area, began a volume at 19:33 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 21, 3:54 PM EDT	TSTM WND DMG	1 Wnw Presto, PA	TREES/WIRES DOWN ON THOMS RUN ROAD AT PINCH ROAD. THOMS RUN ROAD CLOSED.
Jun 21, 3:59 PM EDT	TSTM WND DMG	Washington, PA	WIDESPREAD TREES DOWN ACROSS THE COUNTY; ABOUT 20 DIFFERENT CALLS MADE TO 911.

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 21, 12:31 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 7.5 hours before the alert went out and 17 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: 931 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 260 m²/s²
0-3 km storm-relative helicity: 277 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.1

Open this sounding in Storm Lab

The text

As transmitted.

107 
WUUS51 KPBZ 211929
SVRPBZ
PAC003-125-WVC009-069-212015-
/O.NEW.KPBZ.SV.W.0068.210621T1929Z-210621T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pittsburgh PA
329 PM EDT Mon Jun 21 2021

The National Weather Service in Pittsburgh has issued a

* Severe Thunderstorm Warning for...
  Northwestern Washington County in southwestern Pennsylvania...
  Southwestern Allegheny County in southwestern Pennsylvania...
  Ohio County in northern West Virginia...
  Brooke County in northern West Virginia...

* Until 415 PM EDT.

* At 329 PM EDT, severe thunderstorms were located along a line
  extending from near Imperial to West Liberty, moving east at 15
  mph.

  HAZARD...Wind gusts to 60 mph.

  SOURCE...Radar.

  IMPACT...Expect damage to trees and power lines, resulting in some 
           power outages.

* Locations impacted include...
  Pittsburgh...                     Mount Lebanon...
  Bethel Park...                    Washington...
  Canonsburg...                     West Liberty...
  Avella...                         Upper St. Clair...
  Scott Township...                 Robinson Township...
  Cecil-Bishop...                   Dormont...

This includes the following highways...
  Interstate 70 in Pennsylvania between mile markers 5 and 19.
  Interstate 79 in Pennsylvania between mile markers 37 and 59.
  Interstate 376 in Pennsylvania near mile marker 55, and between 
  mile markers 60 and 66.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4039 8000 4008 8032 4016 8062 4049 8029
TIME...MOT...LOC 1929Z 285DEG 14KT 4048 8028 4016 8059 

HAIL...<.75IN
WIND...60MPH
 
$$

2 follow-up statements

310 
WWUS51 KPBZ 211941
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
341 PM EDT Mon Jun 21 2021

WVC009-069-211950-
/O.CAN.KPBZ.SV.W.0068.000000T0000Z-210621T2015Z/
Ohio WV-Brooke WV-
341 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR OHIO AND BROOKE COUNTIES IS
CANCELLED...

The storms which prompted the warning has moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southwestern Pennsylvania.

LAT...LON 4039 8000 4008 8032 4014 8050 4046 8020
TIME...MOT...LOC 1940Z 285DEG 34KT 4044 8014 4012 8046 

$$

PAC003-125-212015-
/O.CON.KPBZ.SV.W.0068.000000T0000Z-210621T2015Z/
Washington PA-Allegheny PA-
341 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR NORTHWESTERN WASHINGTON AND SOUTHWESTERN ALLEGHENY COUNTIES...

At 340 PM EDT, severe thunderstorms were located along a line
extending from Robinson Township to 6 miles east of Valley Grove,
moving east at 40 mph.

HAZARD...Wind gusts to 60 mph.

SOURCE...Radar.

IMPACT...Expect damage to trees and power lines, resulting in some 
         power outages.

Locations impacted include...
Pittsburgh...                     Mount Lebanon...
Bethel Park...                    Washington...
Canonsburg...                     Upper St. Clair...
Scott Township...                 Robinson Township...
Cecil-Bishop...                   Dormont...
Castle Shannon...                 Carnegie...

This includes the following highways...
  Interstate 70 in Pennsylvania between mile markers 7 and 19.
  Interstate 79 in Pennsylvania between mile markers 37 and 59.
  Interstate 376 in Pennsylvania between mile markers 60 and 66.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4039 8000 4008 8032 4014 8050 4046 8020
TIME...MOT...LOC 1940Z 285DEG 34KT 4044 8014 4012 8046 

HAIL...<.75IN
WIND...60MPH
 
$$

579 
WWUS51 KPBZ 211957
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
357 PM EDT Mon Jun 21 2021

PAC003-125-212015-
/O.CON.KPBZ.SV.W.0068.000000T0000Z-210621T2015Z/
Washington PA-Allegheny PA-
357 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR CENTRAL WASHINGTON AND SOUTH CENTRAL ALLEGHENY COUNTIES...

At 357 PM EDT, severe thunderstorms were located along a line
extending from Green Tree to 7 miles southwest of Wolfdale, moving
east at 15 mph.

HAZARD...Wind gusts to 60 mph.

SOURCE...Radar.

IMPACT...Expect damage to trees and power lines, resulting in some 
         power outages.

Locations impacted include...
Pittsburgh...                     Mount Lebanon...
Bethel Park...                    Washington...
Canonsburg...                     Upper St. Clair...
Scott Township...                 Cecil-Bishop...
Dormont...                        Castle Shannon...
Carnegie...                       Bridgeville...

This includes the following highways...
  Interstate 70 in Pennsylvania between mile markers 17 and 19.
  Interstate 79 in Pennsylvania between mile markers 37 and 56.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4039 8000 4017 8023 4020 8033 4041 8007
TIME...MOT...LOC 1957Z 285DEG 14KT 4042 8006 4010 8038 

HAIL...<.75IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 1:24 PM EDT	Special Weather Statement	PBZ	Marion	36 min
Jun 21, 1:51 PM EDT	Special Weather Statement	PBZ	Preston	24 min
Jun 21, 1:57 PM EDT	Severe Thunderstorm Warning	PBZ	Hancock	48 min
Jun 21, 2:08 PM EDT	Severe Thunderstorm Warning	PBZ	Preston	22 min
Jun 21, 2:21 PM EDT	Severe Thunderstorm Warning	PBZ	Hancock	24 min
Jun 21, 2:37 PM EDT	Severe Thunderstorm Warning	PBZ	Hancock	23 min
Jun 21, 3:00 PM EDT	Severe Thunderstorm Warning	PBZ	Brooke, Hancock, Ohio	30 min
Jun 21, 3:53 PM EDT	Severe Thunderstorm Warning	PBZ	Brooke, Marshall, Ohio	37 min
Jun 21, 4:19 PM EDT	Severe Thunderstorm Warning	PBZ	Marshall, Monongalia, Ohio, Wetzel	41 min
Jun 21, 4:57 PM EDT	Severe Thunderstorm Warning	PBZ	Marshall	29 min
Jun 21, 5:05 PM EDT	Areal Flood Advisory	PBZ	Marshall	3 hr
Jun 21, 5:08 PM EDT	Areal Flood Advisory	PBZ	Marion, Monongalia, Preston, Wetzel	3 hr
Jun 21, 5:41 PM EDT	Special Weather Statement	PBZ	Marion, Monongalia	34 min
Jun 21, 6:07 PM EDT	Severe Thunderstorm Warning	PBZ	Marion, Monongalia, Preston	23 min
Jun 21, 6:12 PM EDT	Areal Flood Advisory	PBZ	Marshall, Ohio	2 hr
Jun 21, 6:26 PM EDT	Special Weather Statement	PBZ	Preston	34 min
Jun 21, 6:39 PM EDT	Areal Flood Advisory	PBZ	Brooke, Marshall, Ohio	2 hr
Jun 21, 6:56 PM EDT	Flash Flood Warning	PBZ	Monongalia	2 hr
Jun 21, 7:46 PM EDT	Areal Flood Warning	PBZ	Marion, Monongalia, Preston, Wetzel	3 hr
Jun 20, 8:55 PM EDT	Special Weather Statement	PBZ	Armstrong	20 min
Jun 21, 7:27 AM EDT	Special Weather Statement	PBZ	Lawrence, Mercer	33 min
Jun 21, 2:15 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer, Venango	30 min
Jun 21, 2:45 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Venango	30 min
Jun 21, 2:51 PM EDT	Tornado Warning	PBZ	Allegheny, Beaver, Butler	9 min
Jun 21, 2:55 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Beaver, Butler, Westmoreland	35 min
Jun 21, 2:58 PM EDT	Tornado Warning	PBZ	Allegheny, Butler	17 min
Jun 21, 3:21 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Indiana, Westmoreland	24 min
Jun 21, 3:25 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Westmoreland	35 min
Jun 21, 3:37 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Indiana, Jefferson, Westmoreland	23 min
Jun 21, 3:45 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Indiana, Westmoreland	45 min
Jun 21, 3:47 PM EDT	Special Weather Statement	PBZ	Washington	28 min
Jun 21, 3:55 PM EDT	Areal Flood Advisory	PBZ	Allegheny, Westmoreland	111 min
Jun 21, 3:55 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Westmoreland	35 min
Jun 21, 3:57 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Jefferson	33 min
Jun 21, 4:05 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Washington, Westmoreland	25 min
Jun 21, 4:13 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	32 min
Jun 21, 4:18 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington, Westmoreland	27 min
Jun 21, 4:27 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	33 min
Jun 21, 4:28 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	32 min
Jun 21, 4:41 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington, Westmoreland	49 min
Jun 21, 4:43 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	32 min
Jun 21, 5:03 PM EDT	Tornado Warning	PBZ	Greene	6 min
Jun 21, 6:43 PM EDT	Special Weather Statement	PBZ	Fayette	32 min
Jun 21, 7:23 PM EDT	Flash Flood Warning	PBZ	Allegheny, Fayette, Washington, Westmoreland	3 hr

Nearby

Severe Thunderstorm Warnings in West Virginia, 2021 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.