Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 28, NWS State College, PA

May 27, 20129 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 27, 2012, 7:56 PM EDT for 9 counties in Pennsylvania. It was in force for 81 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
May 27, 2012, 7:56 PM EDT (23:56 UTC)
Expired
May 27, 2012, 9:17 PM EDT
In force
81 min
Issued by
NWS State College, PA
Area
Storm-based polygon

Counties Adams County, PA, Columbia County, PA, Dauphin County, PA, Lancaster County, PA, Lebanon County, PA, Montour County, PA, Northumberland County, PA, Schuylkill County, PA, York County, PA

The radar

The State College radar (KCCX), 126 km from the middle of the area, began a volume at 23:58 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 27, 8:11 PM EDTTSTM WND DMGDanville, PATREES AND WIRES REPORTED DOWN IN DANVILLE.

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 27, 5:21 PM EDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.9 hours before the alert went out and 177 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, Washington/Dulle, VA at 12:00Z on 2012-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 247 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2012-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.1939Sfc1 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
247 J/kg
Mixed-layer CIN
-198 J/kg
Mixed-layer LCL
935 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
9 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.

676 
WUUS51 KCTP 272356
SVRCTP
PAC001-037-043-071-075-093-097-107-133-280130-
/O.NEW.KCTP.SV.W.0028.120527T2356Z-120528T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
756 PM EDT SUN MAY 27 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ADAMS COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  COLUMBIA COUNTY IN CENTRAL PENNSYLVANIA...
  DAUPHIN COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  LANCASTER COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  LEBANON COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  MONTOUR COUNTY IN CENTRAL PENNSYLVANIA...
  SCHUYLKILL COUNTY IN CENTRAL PENNSYLVANIA...
  YORK COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  NORTHUMBERLAND COUNTY IN CENTRAL PENNSYLVANIA...

* UNTIL 930 PM EDT

* AT 749 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  MILLVILLE TO RINGTOWN TO PALMYRA TO EMIGSVILLE TO MCSHERRYSTOWN TO
  FORT RITCHIE...MOVING EAST AT 30 MPH. THESE STORMS ARE CAPABLE 
  OF PRODUCING DESTRUCTIVE WINDS TO AROUND 70 MPH. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  PINE GROVE AND FRACKVILLE AROUND 800 PM EDT...
  LITTLESTOWN AND SHUMANS AROUND 805 PM EDT...
  SCOTCH VALLEY AND SUMMIT STATION AROUND 810 PM EDT...
  BERWICK AND SHEPPTON AROUND 815 PM EDT...
  TUSCARORA AND ORWIGSBURG AROUND 820 PM EDT...
  HOMETOWN AND NEWMANSTOWN AROUND 825 PM EDT...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 246 AND 295...I-78 BETWEEN
MILE MARKERS 0 AND 8...I-80 BETWEEN MILE MARKERS 211 AND 247...I-81
BETWEEN MILE MARKERS 66 AND 139...I-83 BETWEEN MILE MARKERS 1 AND
50...I-180 BETWEEN MILE MARKERS 1 AND 5...I-283.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE OF SEVERE THUNDERSTORMS HAS A HISTORY OF PRODUCING WIND 
DAMAGE OVER THE PAST FEW HOURS.

SEVERE THUNDERSTORMS PRODUCE DAMAGE. MOVE INSIDE A PERMANENT BUILDING
NOW TO BE SAFE FROM STRONG WIND GUSTS.

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT MONDAY
MORNING FOR CENTRAL PENNSYLVANIA.

&&

LAT...LON 3985 7746 3993 7715 4009 7688 4020 7682
      4035 7693 4038 7703 4047 7695 4062 7695
      4066 7673 4109 7687 4120 7654 4114 7623
      4096 7621 4091 7599 4074 7576 4057 7601
      4049 7643 4014 7587 3972 7610 3972 7746
TIME...MOT...LOC 2354Z 282DEG 27KT 4109 7645 4087 7626
          4035 7653 3999 7669 3980 7701 3971 7747

$$

FORECASTER: LAMBERT
2 follow-up statements
519 
WWUS51 KCTP 280047
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
847 PM EDT SUN MAY 27 2012

PAC001-043-071-075-093-097-133-280057-
/O.CAN.KCTP.SV.W.0028.000000T0000Z-120528T0130Z/
ADAMS PA-DAUPHIN PA-LANCASTER PA-LEBANON PA-MONTOUR PA-YORK PA-
NORTHUMBERLAND PA-
847 PM EDT SUN MAY 27 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHUMBERLAND...YORK...
MONTOUR...LEBANON...LANCASTER...DAUPHIN AND ADAMS COUNTIES IS
CANCELLED...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT MONDAY
MORNING FOR SOUTH CENTRAL PENNSYLVANIA.

LAT...LON 4052 7625 4076 7636 4091 7638 4096 7620
      4091 7599 4074 7576 4057 7601
TIME...MOT...LOC 0047Z 282DEG 27KT 4111 7618 4079 7612
          4027 7603 3990 7622 3966 7649 3944 7680

$$

PAC037-107-280130-
/O.CON.KCTP.SV.W.0028.000000T0000Z-120528T0130Z/
COLUMBIA PA-SCHUYLKILL PA-
847 PM EDT SUN MAY 27 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR SCHUYLKILL AND SOUTHEASTERN COLUMBIA COUNTIES...

AT 841 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 13 MILES NORTH OF NUREMBURG TO SHENANDOAH TO 21 MILES
SOUTH OF PORT CLINTON TO 46 MILES SOUTH OF SUMMIT STATION TO 65 MILES
SOUTH OF SUMMIT STATION TO 85 MILES SOUTHWEST OF SUMMIT STATION...
MOVING EAST AT 30 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
PORT CLINTON AND TUSCARORA AROUND 855 PM EDT...
NEW RINGGOLD AND HOMETOWN AROUND 900 PM EDT...
TAMAQUA AND MCADOO AROUND 905 PM EDT...
COALDALE AROUND 910 PM EDT...
SNYDERS AROUND 920 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT MONDAY
MORNING FOR SOUTH CENTRAL PENNSYLVANIA.

&&

LAT...LON 4052 7625 4076 7636 4091 7638 4096 7620
      4091 7599 4074 7576 4057 7601
TIME...MOT...LOC 0047Z 282DEG 27KT 4111 7618 4079 7612
          4027 7603 3990 7622 3966 7649 3944 7680

$$

FORECASTER: KF
034 
WWUS51 KCTP 280117
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
917 PM EDT SUN MAY 27 2012

PAC037-107-280128-
/O.CAN.KCTP.SV.W.0028.000000T0000Z-120528T0130Z/
COLUMBIA PA-SCHUYLKILL PA-
917 PM EDT SUN MAY 27 2012

...THE SEVERE THUNDERSTORM WARNING FOR SCHUYLKILL AND SOUTHEASTERN
COLUMBIA COUNTIES IS CANCELLED...

THE STORM HAS WEAKENED TO BELOW SEVERE LIMITS...THEREFORE THE SEVERE
THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 4052 7625 4076 7636 4091 7638 4096 7620
      4091 7599 4074 7576 4057 7601
TIME...MOT...LOC 0118Z 282DEG 27KT 4106 7587 4074 7582
          4022 7573 3985 7592 3961 7620 3939 7651

$$

FORECASTER: KF

The office that day

Everything else NWS State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 27, 2:37 AM EDTDense Fog AdvisoryCTPBedford, Blair, Centre, Fulton, Huntingdon, Mifflin6 hr
May 27, 3:06 AM EDTSpecial Weather StatementCTPSchuylkill24 min
May 27, 1:38 PM EDTAreal Flood AdvisoryCTPAdams, Cumberland82 min
May 27, 1:47 PM EDTSpecial Weather StatementCTPSomerset43 min
May 27, 1:52 PM EDTFlash Flood WarningCTPAdams, Cumberland83 min
May 27, 1:52 PM EDTSpecial Weather StatementCTPAdams53 min
May 27, 2:03 PM EDTSevere Thunderstorm WarningCTPBedford, Somerset43 min
May 27, 2:28 PM EDTSpecial Weather StatementCTPBedford62 min
May 27, 3:58 PM EDTSpecial Weather StatementCTPElk77 min
May 27, 4:02 PM EDTSpecial Weather StatementCTPSchuylkill58 min
May 27, 4:25 PM EDTSpecial Weather StatementCTPClearfield35 min
May 27, 4:37 PM EDTSevere Thunderstorm WarningCTPCambria, Cameron, Clearfield, Elk53 min
May 27, 5:02 PM EDTSpecial Weather StatementCTPCameron, Potter58 min
May 27, 5:10 PM EDTSevere Thunderstorm WarningCTPBlair, Cambria, Cameron, Centre, Clearfield, Clinton and 1 more80 min
May 27, 5:28 PM EDTSpecial Weather StatementCTPCambria32 min
May 27, 5:37 PM EDTSpecial Weather StatementCTPUnion38 min
May 27, 5:41 PM EDTSevere Thunderstorm WarningCTPBedford, Blair, Cambria, Somerset79 min
May 27, 5:51 PM EDTSpecial Weather StatementCTPMifflin24 min
May 27, 6:08 PM EDTSevere Thunderstorm WarningCTPBedford, Blair, Centre, Cumberland, Franklin, Fulton and 7 more52 min
May 27, 6:21 PM EDTSpecial Weather StatementCTPLycoming, Montour, Union54 min
May 27, 6:54 PM EDTSevere Thunderstorm WarningCTPAdams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 5 more66 min
May 27, 7:07 PM EDTSevere Thunderstorm WarningCTPBedford, Cumberland, Franklin, Fulton, Huntingdon, Perry and 1 more38 min
May 27, 7:18 PM EDTSpecial Weather StatementCTPLycoming27 min
May 27, 7:21 PM EDTSpecial Weather StatementCTPMontour, Northumberland24 min
May 27, 7:46 PM EDTSpecial Weather StatementCTPColumbia, Montour, Northumberland44 min
May 27, 7:51 PM EDTSpecial Weather StatementCTPSomerset39 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.