Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 59, NWS Cleveland, OH

July 20, 2021Crawford County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Jul 20, 2021, 6:36 PM EDT for Crawford County, Pennsylvania. It was in force for 39 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: Jul 20, 2021, 6:36 PM EDT (22:36 UTC)
Expired: Jul 20, 2021, 7:15 PM EDT
In force: 39 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Crawford County, PA

The radar

The Pittsburgh radar (KPBZ), 133 km from the middle of the area, began a volume at 22:39 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 20, 7:05 PM EDT	TSTM WND DMG	1 Wsw Hydetown, PA	TREE DOWN AT SR-408 AND PATTERSON RD.
Jul 20, 7:05 PM EDT	TSTM WND DMG	Titusville, PA	TREES DOWN AROUND TITUSVILLE. TIME ESTIMATED VIA RADAR.

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, 10.6 hours before the alert went out and 144 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: 66 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 852 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

400 
WUUS51 KCLE 202236
SVRCLE
PAC039-202315-
/O.NEW.KCLE.SV.W.0059.210720T2236Z-210720T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cleveland OH
Issued by National Weather Service Wilmington OH
636 PM EDT Tue Jul 20 2021

The National Weather Service in Cleveland has issued a

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

* Until 715 PM EDT.

* At 636 PM EDT, a severe thunderstorm was located near Titusville,
  moving southeast at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect damage to 
           trees and power lines.

* Locations impacted include...
  Titusville, Riceville, Hydetown and Townville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4162 7983 4161 7983 4168 7989 4183 7977
      4180 7961 4162 7961
TIME...MOT...LOC 2236Z 294DEG 19KT 4171 7970 

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

Hatzos

3 follow-up statements

518 
WWUS51 KCLE 202245
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
Issued by National Weather Service Wilmington OH
645 PM EDT Tue Jul 20 2021

PAC039-202315-
/O.CON.KCLE.SV.W.0059.000000T0000Z-210720T2315Z/
Crawford PA-
645 PM EDT Tue Jul 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR EAST CENTRAL CRAWFORD COUNTY...

At 645 PM EDT, a severe thunderstorm was located near Titusville,
moving southeast at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect damage to 
         trees and power lines.

Locations impacted include...
Titusville, Hydetown and Townville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4162 7983 4161 7983 4168 7989 4176 7983
      4179 7961 4162 7961
TIME...MOT...LOC 2245Z 298DEG 11KT 4171 7970 

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

Hatzos

133 
WWUS51 KCLE 202255
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
Issued by National Weather Service Wilmington OH
655 PM EDT Tue Jul 20 2021

PAC039-202315-
/O.CON.KCLE.SV.W.0059.000000T0000Z-210720T2315Z/
Crawford PA-
655 PM EDT Tue Jul 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR EAST CENTRAL CRAWFORD COUNTY...

At 654 PM EDT, a severe thunderstorm was located over Hydetown, 
moving southeast at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect damage to 
         trees and power lines.

Locations impacted include...
Titusville, Hydetown and Townville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4162 7983 4161 7983 4167 7988 4172 7985
      4176 7961 4162 7961
TIME...MOT...LOC 2254Z 304DEG 13KT 4166 7969 

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

Hatzos

031 
WWUS51 KCLE 202312
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
Issued by National Weather Service Wilmington OH
712 PM EDT Tue Jul 20 2021

PAC039-202321-
/O.EXP.KCLE.SV.W.0059.000000T0000Z-210720T2315Z/
Crawford PA-
712 PM EDT Tue Jul 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CRAWFORD COUNTY
WILL EXPIRE AT 715 PM EDT...
        
The storm which prompted the warning is moving out of the warned 
area. Therefore, the warning will be allowed to expire.

LAT...LON 4162 7983 4161 7983 4167 7988 4172 7985
      4176 7961 4162 7961
TIME...MOT...LOC 2311Z 294DEG 19KT 4163 7959 

$$

Hatzos

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 6:15 PM EDT	Special Weather Statement	CLE	Crawford	30 min
Jul 20, 6:57 PM EDT	Areal Flood Advisory	CLE	Crawford	3 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.