Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 22, NWS Cleveland, OH

April 27, 2011Erie County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Apr 27, 2011, 4:09 PM EDT for Erie County, Pennsylvania. It was in force for 66 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: Apr 27, 2011, 4:09 PM EDT (20:09 UTC)
Expired: Apr 27, 2011, 5:15 PM EDT
In force: 66 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon

County Erie County, PA

The radar

The Buffalo radar (KBUF), 141 km from the middle of the area, began a volume at 20:09 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
Apr 27, 4:40 PM EDT	TSTM WND GST 60	Union City, PA
Apr 27, 4:42 PM EDT	TSTM WND GST 60	5 E Union City, PA

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

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.2 hours before the alert went out and 142 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: 27 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 987 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

299 
WUUS51 KCLE 272009
SVRCLE
PAC049-272115-
/O.NEW.KCLE.SV.W.0022.110427T2009Z-110427T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
409 PM EDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ERIE COUNTY IN NORTHWEST PENNSYLVANIA

* UNTIL 515 PM EDT

* AT 406 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 15 MILES SOUTH OF ALBION TO 34 MILES SOUTH OF UNION CITY...AND
  MOVING NORTHEAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ERIE...
  ALBION...
  EDINBORO...
  GIRARD...
  WATERFORD...
  UNION CITY...
  CORRY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. SEEK SHELTER INSIDE NOW AND STAY AWAY FROM
WINDOWS.

&&

PLEASE REPORT HAIL AND STRONG WINDS TO THE NATIONAL WEATHER SERVICE
BY CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4199 7977 4200 7962 4185 7962 4185 8052
      4199 8051 4210 8019 4217 8012 4217 8009
      4215 8008 4215 8004 4222 7993 4223 7985
      4227 7976
TIME...MOT...LOC 2009Z 207DEG 56KT 4171 8031 4144 7987

$$

LOMBARDY

2 follow-up statements

715 
WWUS51 KCLE 272049
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
449 PM EDT WED APR 27 2011

PAC049-272115-
/O.CON.KCLE.SV.W.0022.000000T0000Z-110427T2115Z/
ERIE PA-
449 PM EDT WED APR 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR ERIE COUNTY IN NORTHWEST PENNSYLVANIA...

AT 442 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES NORTHEAST OF ERIE TO CORRY...MOVING NORTHEAST
AT 45 MPH.

AN ESTIMATED WIND GUST TO 60 MPH WAS REPORTED BY A TRAINED SPOTTER 
IN ELGIN.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO  
  ERIE...

LAT...LON 4199 7977 4200 7962 4185 7962 4185 8052
      4199 8051 4210 8019 4217 8012 4217 8009
      4215 8008 4215 8004 4222 7993 4223 7985
      4227 7976
TIME...MOT...LOC 2048Z 207DEG 56KT 4225 7994 4198 7949

$$

LOMBARDY

277 
WWUS51 KCLE 272112
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
512 PM EDT WED APR 27 2011

PAC049-272121-
/O.EXP.KCLE.SV.W.0022.000000T0000Z-110427T2115Z/
ERIE PA-
512 PM EDT WED APR 27 2011

...THE SEVERE THUNDERSTORM WARNING FOR ERIE COUNTY IN NORTHWEST
PENNSYLVANIA EXPIRES AT 515 PM EDT...

THE THUNDERSTORMS THAT PROMPTED THE WARNING HAVE MOVED NORTHEAST OF 
THE COUNTY.  THEREFORE...THE SEVERE THUNDERSTORM WARNING FOR ERIE 
COUNTY WILL BE ALLOWED TO EXPIRE.

LAT...LON 4199 7977 4200 7962 4185 7962 4185 8052
      4199 8051 4210 8019 4217 8012 4217 8009
      4215 8008 4215 8004 4222 7993 4223 7985
      4227 7976
TIME...MOT...LOC 2111Z 207DEG 56KT 4257 7971 4230 7926

$$

LOMBARDY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 3:46 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	59 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2011 Every severe thunderstorm warning in 2011

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.