Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 129, NWS Pittsburgh, PA

July 7, 2021Fayette County, Greene County, Pennsylvania; Monongalia County, Preston County, West Virginia

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 7, 2021, 6:40 PM EDT for Fayette County, Greene County, Pennsylvania; Monongalia County, Preston County, West Virginia. It was in force for 20 min. 1 report 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: Jul 7, 2021, 6:40 PM EDT (22:40 UTC)
Expired: Jul 7, 2021, 7:00 PM EDT
In force: 20 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Fayette County, PA, Greene County, PA, Monongalia County, WV, Preston County, WV

The radar

The Pittsburgh radar (KPBZ), 94 km from the middle of the area, began a volume at 22:43 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
Jul 7, 6:48 PM EDT	TSTM WND DMG	1 N Outcrop, PA	ROAD CLOSURE DUE TO TREES DOWN ALONG MORGANTOWN ROAD

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

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 10.7 hours before the alert went out and 78 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: 505 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 1230 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

859 
WUUS51 KPBZ 072240
SVRPBZ
PAC051-059-WVC061-077-072300-
/O.NEW.KPBZ.SV.W.0129.210707T2240Z-210707T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pittsburgh PA
640 PM EDT Wed Jul 7 2021

The National Weather Service in Pittsburgh has issued a

* Severe Thunderstorm Warning for...
  Southeastern Greene County in southwestern Pennsylvania...
  Southwestern Fayette County in southwestern Pennsylvania...
  Northeastern Monongalia County in northern West Virginia...
  Northwestern Preston County in northeastern West Virginia...

* Until 700 PM EDT.

* At 640 PM EDT, a severe thunderstorm was located over Point Marion,
  or near Morgantown, moving northeast at 30 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...
  Uniontown...                      Point Marion...
  Fairchance...                     Smithfield...
  Cheat Lake...                     

This includes Interstate 68 in West Virginia between mile markers 9
and 10.
 
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 3966 7987 3971 7997 3991 7980 3979 7960
TIME...MOT...LOC 2240Z 223DEG 25KT 3973 7988 

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

2 follow-up statements

703 
WWUS51 KPBZ 072248
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
648 PM EDT Wed Jul 7 2021

PAC051-059-WVC061-077-072300-
/O.CON.KPBZ.SV.W.0129.000000T0000Z-210707T2300Z/
Greene PA-Fayette PA-Monongalia WV-Preston WV-
648 PM EDT Wed Jul 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTHEASTERN GREENE...SOUTHWESTERN FAYETTE...NORTHEASTERN
MONONGALIA AND NORTHWESTERN PRESTON COUNTIES...

At 648 PM EDT, a severe thunderstorm was located near Point Marion,
or 10 miles southwest of Uniontown, moving northeast at 30 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...
Uniontown...                      Point Marion...
Fairchance...                     Smithfield...
Cheat Lake...                     

This includes Interstate 68 in West Virginia between mile markers 9
and 10.
 
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 3966 7987 3971 7997 3991 7980 3979 7960
TIME...MOT...LOC 2248Z 223DEG 25KT 3977 7983 

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

717 
WWUS51 KPBZ 072257
SVSPBZ

Severe Weather Statement
National Weather Service Pittsburgh PA
657 PM EDT Wed Jul 7 2021

PAC051-059-WVC061-077-072306-
/O.EXP.KPBZ.SV.W.0129.000000T0000Z-210707T2300Z/
Greene PA-Fayette PA-Monongalia WV-Preston WV-
657 PM EDT Wed Jul 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GREENE...
SOUTHWESTERN FAYETTE...NORTHEASTERN MONONGALIA AND NORTHWESTERN
PRESTON COUNTIES WILL EXPIRE AT 700 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 3966 7987 3971 7997 3991 7980 3979 7960
TIME...MOT...LOC 2256Z 223DEG 25KT 3979 7980 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 1:36 PM EDT	Special Weather Statement	PBZ	Fayette	24 min
Jul 7, 1:57 PM EDT	Special Weather Statement	PBZ	Fayette	18 min
Jul 7, 2:01 PM EDT	Special Weather Statement	PBZ	Greene	14 min
Jul 7, 2:10 PM EDT	Special Weather Statement	PBZ	Westmoreland	20 min
Jul 7, 2:25 PM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	20 min
Jul 7, 2:32 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	13 min
Jul 7, 2:42 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver	18 min
Jul 7, 2:54 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Washington	36 min
Jul 7, 2:58 PM EDT	Special Weather Statement	PBZ	Allegheny	32 min
Jul 7, 2:59 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny	31 min
Jul 7, 3:01 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	29 min
Jul 7, 3:13 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	32 min
Jul 7, 3:19 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington, Westmoreland	26 min
Jul 7, 3:26 PM EDT	Flash Flood Warning	PBZ	Allegheny, Armstrong, Fayette, Washington, Westmoreland	2 hr
Jul 7, 3:36 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	24 min
Jul 7, 3:45 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Westmoreland	30 min
Jul 7, 3:47 PM EDT	Special Weather Statement	PBZ	Beaver	28 min
Jul 7, 3:53 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny	37 min
Jul 7, 4:01 PM EDT	Severe Thunderstorm Warning	PBZ	Butler	29 min
Jul 7, 4:21 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	39 min
Jul 7, 4:28 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion	32 min
Jul 7, 4:33 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Jefferson	27 min
Jul 7, 4:35 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Butler, Clarion, Venango	25 min
Jul 7, 4:40 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	13 min
Jul 7, 4:58 PM EDT	Severe Thunderstorm Warning	PBZ	Butler, Lawrence, Mercer, Venango	47 min
Jul 7, 4:59 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Jefferson	31 min
Jul 7, 5:01 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Jefferson	29 min
Jul 7, 5:06 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson	24 min
Jul 7, 5:20 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer, Venango	25 min
Jul 7, 5:24 PM EDT	Areal Flood Advisory	PBZ	Allegheny, Washington, Westmoreland	111 min
Jul 7, 5:24 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion, Forest, Jefferson	51 min
Jul 7, 7:19 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Washington	26 min
Jul 7, 7:22 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington	23 min
Jul 7, 7:33 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington	27 min
Jul 7, 7:37 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	23 min
Jul 7, 1:26 PM EDT	Special Weather Statement	PBZ	Monongalia	34 min
Jul 7, 1:56 PM EDT	Special Weather Statement	PBZ	Ohio	19 min
Jul 7, 2:28 PM EDT	Special Weather Statement	PBZ	Hancock	17 min
Jul 7, 2:37 PM EDT	Severe Thunderstorm Warning	PBZ	Preston, Tucker	23 min
Jul 7, 2:58 PM EDT	Severe Thunderstorm Warning	PBZ	Brooke, Hancock	32 min
Jul 7, 3:32 PM EDT	Special Weather Statement	PBZ	Hancock	28 min
Jul 7, 3:42 PM EDT	Severe Thunderstorm Warning	PBZ	Hancock	33 min
Jul 7, 3:53 PM EDT	Flash Flood Warning	PBZ	Tucker	100 min
Jul 7, 4:11 PM EDT	Special Weather Statement	PBZ	Hancock	34 min
Jul 7, 4:16 PM EDT	Severe Thunderstorm Warning	PBZ	Brooke, Hancock	44 min
Jul 7, 5:31 PM EDT	Areal Flood Advisory	PBZ	Brooke, Hancock	119 min

Nearby

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