Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 20, NWS Cleveland, OH

June 21, 2021Crawford County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Jun 21, 2021, 2:06 PM EDT for Crawford County, Pennsylvania. It was in force for 54 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, 2:06 PM EDT (18:06 UTC)
Expired: Jun 21, 2021, 3:00 PM EDT
In force: 54 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Tornado: Possible
Hail: 1.25 in
Wind: 60.0 mph

County Crawford County, PA

The radar

The Pittsburgh radar (KPBZ), 118 km from the middle of the area, began a volume at 18:08 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, 2:08 PM EDT	TSTM WND DMG	5 Ssw Meadville, PA	TREE DOWN.
Jun 21, 2:25 PM EDT	TSTM WND DMG	3 E Titusville, PA	POWER POLE SNAPPED AND TREE DOWN OVER ROAD.

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, 6.1 hours before the alert went out and 131 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.

909 
WUUS51 KCLE 211806
SVRCLE
PAC039-211900-
/O.NEW.KCLE.SV.W.0020.210621T1806Z-210621T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cleveland OH
206 PM EDT Mon Jun 21 2021

The National Weather Service in Cleveland has issued a

* Severe Thunderstorm Warning for...
  Southern Crawford County in northwestern Pennsylvania...

* Until 300 PM EDT.

* At 206 PM EDT, severe thunderstorms were located along a line
  extending from Meadville to Adamsville, moving east at 35 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           damage to trees and power lines.

* Locations impacted include...
  Meadville, Titusville, Harmonsburg, Adamsville, Guys Mills,
  Atlantic, Cochranton, Saegertown, Conneaut Lake, Hydetown, Blooming
  Valley, Townville, Conneaut Lakeshore, Geneva and Hartstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning are occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4162 7982 4149 8000 4149 8009 4148 8013
      4149 8041 4170 8033 4172 7961 4162 7962
TIME...MOT...LOC 1806Z 263DEG 28KT 4166 8016 4150 8036 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...60MPH
 
$$

Jaszka

3 follow-up statements

516 
WWUS51 KCLE 211826
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
226 PM EDT Mon Jun 21 2021

PAC039-211900-
/O.CON.KCLE.SV.W.0020.000000T0000Z-210621T1900Z/
Crawford PA-
226 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR SOUTHERN CRAWFORD COUNTY...

At 224 PM EDT, a cluster of severe thunderstorms was centered near 
Guys Mills, or near Meadville, moving east at 35 mph.

HAZARD...70 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated. Multiple downed trees have been reported 
         in southern Crawford County.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Meadville, Titusville, Guys Mills, Cochranton, Conneaut Lake,
Hydetown, Blooming Valley, Townville, Geneva and Conneaut Lakeshore.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4149 8034 4170 8028 4172 7961 4162 7962
      4162 7982 4149 8000 4149 8009 4148 8013
TIME...MOT...LOC 1824Z 261DEG 28KT 4159 8004 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...70MPH
 
$$

Jaszka

281 
WWUS51 KCLE 211839
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
239 PM EDT Mon Jun 21 2021

PAC039-211900-
/O.CON.KCLE.SV.W.0020.000000T0000Z-210621T1900Z/
Crawford PA-
239 PM EDT Mon Jun 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR EAST CENTRAL CRAWFORD COUNTY...

At 238 PM EDT, a severe thunderstorm was located near Titusville, or
16 miles north of Oil City, moving northeast at 50 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Titusville and Hydetown. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4160 7985 4171 7984 4172 7961 4162 7962
      4162 7982
TIME...MOT...LOC 1838Z 245DEG 44KT 4167 7966 

HAIL...1.00IN
WIND...70MPH
 
$$

Jaszka

737 
WWUS51 KCLE 211851
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
251 PM EDT Mon Jun 21 2021

PAC039-211901-
/O.EXP.KCLE.SV.W.0020.000000T0000Z-210621T1900Z/
Crawford PA-
251 PM EDT Mon Jun 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CRAWFORD COUNTY
WILL EXPIRE AT 300 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 4160 7985 4171 7984 4172 7961 4162 7962
      4162 7982
TIME...MOT...LOC 1851Z 263DEG 28KT 4168 7954 

$$

Jaszka

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 20, 10:45 PM EDT	Special Weather Statement	CLE	Erie	45 min
Jun 20, 11:19 PM EDT	Severe Thunderstorm Warning	CLE	Erie	26 min
Jun 21, 3:09 AM EDT	Special Weather Statement	CLE	Erie	66 min
Jun 21, 7:40 AM EDT	Special Weather Statement	CLE	Crawford, Erie	35 min
Jun 21, 1:15 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	60 min
Jun 21, 1:53 PM EDT	Areal Flood Advisory	CLE	Crawford	5 hr

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.