Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 55, NWS Cleveland, OH

May 29, 2012Crawford County, Erie County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at May 29, 2012, 11:37 AM EDT for Crawford County, Erie County, Pennsylvania. It was in force for 38 min. 6 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
May 29, 2012, 11:37 AM EDT (15:37 UTC)
Expired
May 29, 2012, 12:15 PM EDT
In force
38 min
Issued by
NWS Cleveland, OH
Area
Storm-based polygon

Counties Crawford County, PA, Erie County, PA

The radar

The Pittsburgh radar (KPBZ), 146 km from the middle of the area, began a volume at 15:40 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

TimeReportWhereRemark
May 29, 11:44 AM EDTHAIL 15 Nne Cambridge Springs, PA
May 29, 11:47 AM EDTHAIL 1.75Corry, PA
May 29, 11:56 AM EDTHAIL 1.75Spartansburg, PA
May 29, 12:00 PM EDTHAIL 1Corry, PA
May 29, 12:01 PM EDTHAIL 1.75Corry, PA
May 29, 12:20 PM EDTHAIL 1.25Titusville, PA

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.

IssuedProductOfficeLasted
May 29, 10:27 AM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 3.6 hours before the alert went out and 159 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-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 2012-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1123 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2012-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 96 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1123 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
1071 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
96 m²/s²
0-3 km storm-relative helicity
114 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.3

Open this sounding in Storm Lab

The text

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

951 
WUUS51 KCLE 291537
SVRCLE
PAC039-049-291615-
/O.NEW.KCLE.SV.W.0055.120529T1537Z-120529T1615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
1137 AM EDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

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

* UNTIL 1215 PM EDT

* AT 1130 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM WATERFORD TO 12 MILES SOUTH OF
  LINESVILLE...AND MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  UNION CITY...
  NORTH EAST...
  CORRY...
  SPARTANSBURG...
  TITUSVILLE...

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 4228 7976 4201 7975 4200 7960 4161 7962
      4161 7982 4148 8001 4148 8011 4147 8013
      4149 8052 4182 8052 4216 8007 4216 8004
TIME...MOT...LOC 1537Z 244DEG 30KT 4195 7986 4152 8028

$$

LAPLANTE
2 follow-up statements
779 
WWUS51 KCLE 291603
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
1203 PM EDT TUE MAY 29 2012

PAC039-049-291615-
/O.CON.KCLE.SV.W.0055.000000T0000Z-120529T1615Z/
CRAWFORD PA-ERIE PA-
1203 PM EDT TUE MAY 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM EDT
FOR ERIE AND CRAWFORD COUNTIES IN NORTHWEST PENNSYLVANIA...

AT NOON EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM CORRY TO 10 MILES SOUTHEAST OF
MEADVILLE...MOVING NORTHEAST AT 30 MPH.

LOCATIONS NEAR THE PATH OF SEVERE THUNDERSTORMS INCLUDE...
SPARTANSBURG AND TITUSVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
TUESDAY EVENING FOR NORTHEAST OHIO AND NORTHWEST PENNSYLVANIA.

&&

LAT...LON 4228 7976 4201 7975 4200 7960 4161 7962
      4161 7982 4148 8001 4148 8011 4147 8013
      4149 8052 4182 8052 4216 8007 4216 8004
TIME...MOT...LOC 1603Z 225DEG 28KT 4192 7962 4154 8000

$$

SJAMISON
557 
WWUS51 KCLE 291611
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
1211 PM EDT TUE MAY 29 2012

PAC039-049-291620-
/O.EXP.KCLE.SV.W.0055.000000T0000Z-120529T1615Z/
CRAWFORD PA-ERIE PA-
1211 PM EDT TUE MAY 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR ERIE AND CRAWFORD COUNTIES IN
NORTHWEST PENNSYLVANIA EXPIRES AT 1215 PM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF 
THE WARNED AREA. SOME SMALL HAIL...HEAVY RAIN...AND GUSTY WINDS 
UPWARDS OF 35 MPH IS STILL POSSIBLE WITH THE REMAINING STORMS AS 
THEY MOVE EAST AT 30 MPH. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
TUESDAY EVENING FOR NORTHEAST OHIO AND NORTHWEST PENNSYLVANIA.

LAT...LON 4228 7976 4201 7975 4200 7960 4161 7962
      4161 7982 4148 8001 4148 8011 4147 8013
      4149 8052 4182 8052 4216 8007 4216 8004
TIME...MOT...LOC 1610Z 225DEG 28KT 4196 7957 4158 7995

$$

SJAMISON

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 10:45 AM EDTSevere Thunderstorm WarningCLECrawford, Erie60 min
May 29, 12:19 PM EDTSevere Thunderstorm WarningCLECrawford11 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2012Every severe thunderstorm warning in 2012

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.