Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 103, NWS Cleveland, OH

September 12, 2021Erie County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Sep 12, 2021, 11:23 PM EDT for Erie County, Pennsylvania. It was in force for 37 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: Sep 12, 2021, 11:23 PM EDT (03:23 UTC)
Expired: Sep 13, 2021, 12:00 AM EDT
In force: 37 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Erie County, PA

The radar

The Buffalo radar (KBUF), 122 km from the middle of the area, began a volume at 03:28 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
Sep 12, 11:40 PM EDT	TSTM WND DMG	1 Ene North East, PA	SEVERAL LARGE TREE LIMBS WITH A DIAMETER OF AROUND 6 TO 8 INCHES WERE DOWNED.
Sep 12, 11:40 PM EDT	MARINE TSTM WIND 42	2 Nw North East, PA	STATION PMN05 10M MEASURED WIND.

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
Sep 12, 10:25 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 3.4 hours before the alert went out and 122 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: 412 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 706 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 205 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

891 
WUUS51 KCLE 130323
SVRCLE
PAC049-130400-
/O.NEW.KCLE.SV.W.0103.210913T0323Z-210913T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cleveland OH
1123 PM EDT Sun Sep 12 2021

The National Weather Service in Cleveland has issued a

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

* Until midnight EDT.

* At 1123 PM EDT, severe thunderstorms were located along a line
  extending from 15 miles north of North East to 12 miles north of
  Northwest Harborcreek to 12 miles northwest of Erie, moving east at
  65 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to trees and power lines.

* Locations impacted include...
  North East, Northwest Harborcreek and Harborcreek. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4227 7976 4210 7976 4218 8001 4224 7988
TIME...MOT...LOC 0323Z 285DEG 54KT 4243 7993 4232 8007 4228 8020 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Greenawalt

1 follow-up statement

176 
WWUS51 KCLE 130400
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
1200 AM EDT Mon Sep 13 2021

PAC049-130409-
/O.EXP.KCLE.SV.W.0103.000000T0000Z-210913T0400Z/
Erie PA-
1200 AM EDT Mon Sep 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ERIE COUNTY WILL
EXPIRE AT MIDNIGHT EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 200 AM EDT for
northwestern Pennsylvania.

LAT...LON 4227 7976 4210 7976 4218 8001 4224 7988
TIME...MOT...LOC 0359Z 285DEG 54KT 4229 7924 4218 7938 4214 7951 

$$

Greenawalt

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 13, 4:39 PM EDT	Special Weather Statement	CLE	Erie	36 min
Sep 13, 5:05 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	25 min
Sep 13, 5:16 PM EDT	Special Weather Statement	CLE	Crawford	44 min

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.