Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 97, NWS Cleveland, OH
NWS Cleveland, OH issued this severe thunderstorm warning at Aug 12, 2021, 5:36 PM EDT for Crawford County, Pennsylvania. It was in force for 39 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
- Aug 12, 2021, 5:36 PM EDT (21:36 UTC)
- Expired
- Aug 12, 2021, 6:15 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), 123 km from the middle of the area, began a volume at 21:38 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 |
|---|---|---|---|
| Aug 12, 5:40 PM EDT | TSTM WND DMG | Conneaut Lake, PA | TREE FELL ONTO A HOUSE SEVERELY DAMAGING THE HOME NEAR SUMMIT TOWNSHIP IN WESTERN CRAWFORD COUNTY. A MOBILE HOME WAS SEVERELY DAMAGED. NUMEROUS TREES WERE BLOWN DOWN. TIME WAS ESTIMATED BY RADAR. |
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 |
|---|---|---|---|
| Aug 12, 3:48 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 9.6 hours before the alert went out and 135 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.
- Mixed-layer CAPE
- 1075 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 890 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 163 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted.
583
WUUS51 KCLE 122136
SVRCLE
PAC039-122215-
/O.NEW.KCLE.SV.W.0097.210812T2136Z-210812T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cleveland OH
536 PM EDT Thu Aug 12 2021
The National Weather Service in Cleveland has issued a
* Severe Thunderstorm Warning for...
Crawford County in northwestern Pennsylvania...
* Until 615 PM EDT.
* At 536 PM EDT, severe thunderstorms were located along a line
extending from near Cambridge Springs to near Kinsman, moving east
at 35 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...
Meadville, Titusville, Cambridge Springs, Linesville, Adamsville,
Canadohta Lake, Pymatuning Central, Riceville, Harmonsburg,
Lincolnville, Guys Mills, Atlantic, Pymatuning North, Cochranton,
Saegertown, Conneaut Lake, Jamestown, Hydetown, Blooming Valley and
Townville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4162 7962 4162 7982 4149 8000 4148 8013
4149 8051 4164 8052 4181 8012 4185 7961
TIME...MOT...LOC 2136Z 249DEG 30KT 4175 8013 4146 8052
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kahn2 follow-up statements
012
WWUS51 KCLE 122159
SVSCLE
Severe Weather Statement
National Weather Service Cleveland OH
559 PM EDT Thu Aug 12 2021
PAC039-122215-
/O.CON.KCLE.SV.W.0097.000000T0000Z-210812T2215Z/
Crawford PA-
559 PM EDT Thu Aug 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR CRAWFORD COUNTY...
At 559 PM EDT, severe thunderstorms were located along a line
extending from near Canadohta Lake to near Atlantic, moving east at
35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect damage to
trees and power lines.
Locations impacted include...
Meadville, Titusville, Riceville, Harmonsburg, Adamsville,
Lincolnville, Guys Mills, Pymatuning Central, Atlantic, Canadohta
Lake, Cochranton, Saegertown, Conneaut Lake, Jamestown, Hydetown,
Blooming Valley, Townville, Spartansburg, Woodcock and Conneaut
Lakeshore.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4162 7962 4162 7982 4149 8000 4148 8013
4149 8051 4163 8047 4176 8012 4185 7961
TIME...MOT...LOC 2159Z 249DEG 30KT 4182 7989 4153 8028
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kahn576
WWUS51 KCLE 122213
SVSCLE
Severe Weather Statement
National Weather Service Cleveland OH
613 PM EDT Thu Aug 12 2021
PAC039-122223-
/O.EXP.KCLE.SV.W.0097.000000T0000Z-210812T2215Z/
Crawford PA-
613 PM EDT Thu Aug 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR CRAWFORD COUNTY WILL EXPIRE AT
615 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire. However gusty winds and heavy rain are still
possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northwestern Pennsylvania.
LAT...LON 4162 7962 4162 7982 4149 8000 4148 8013
4149 8051 4163 8047 4176 8012 4185 7961
TIME...MOT...LOC 2213Z 270DEG 30KT 4185 7977 4156 8017
$$
KahnThe office that day
Everything else NWS Cleveland, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 11:01 AM EDT | Severe Thunderstorm Warning | CLE | Crawford | 40 min |
| Aug 12, 4:58 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 47 min |
| Aug 12, 5:06 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 39 min |
| Aug 12, 6:31 PM EDT | Areal Flood Advisory | CLE | Crawford | 2 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2021Every 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.