Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 182, NWS State College, PA

August 5, 2012Lancaster County, Lebanon County, York County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 5, 2012, 4:16 PM EDT for Lancaster County, Lebanon County, York County, Pennsylvania. It was in force for 59 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
Aug 5, 2012, 4:16 PM EDT (20:16 UTC)
Expired
Aug 5, 2012, 5:15 PM EDT
In force
59 min
Issued by
NWS State College, PA
Area
Storm-based polygon

Counties Lancaster County, PA, Lebanon County, PA, York County, PA

The radar

The Sterling radar (KLWX), 159 km from the middle of the area, began a volume at 20:16 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
Aug 5, 4:41 PM EDTTSTM WND DMG2 E East Petersburg, PASEVERAL TREES DOWN IN MANHEIM TOWNSHIP
Aug 5, 4:46 PM EDTTSTM WND DMG2 E Brickerville, PATREES AND POER LINES DOWN IN CLAY TOWNSHIP

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
Aug 5, 3:36 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.3 hours before the alert went out and 157 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 2012-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 809 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, Washington/Dulle, VA at 12:00Z on 2012-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 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
809 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
1048 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
57 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.

926 
WUUS51 KCTP 052016
SVRCTP
PAC071-075-133-052115-
/O.NEW.KCTP.SV.W.0182.120805T2016Z-120805T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
416 PM EDT SUN AUG 5 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LANCASTER COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  LEBANON COUNTY IN SOUTH CENTRAL PENNSYLVANIA...
  EASTERN YORK COUNTY IN SOUTH CENTRAL PENNSYLVANIA...

* UNTIL 515 PM EDT

* AT 409 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  LICKDALE TO CLEONA TO LANDISVILLE TO EAST PROSPECT TO
  STEWARTSTOWN...MOVING EAST AT 35 MPH. THESE STORMS ARE CAPABLE OF
  PRODUCING DAMAGING WINDS IN EXCESS OF 65 MPH. 

* LOCATIONS IN THE WARNING INCLUDE...
  SAFE HARBOR AND MILLERSVILLE...
  MYERSTOWN AND KLEINFELTERSVILLE...
  RICHLAND AND KLEINFELTERSVILLE...
  NEWMANSTOWN AND STRASBURG...
  REAMSTOWN AND DENVER...
  PARADISE AND NEW HOLLAND...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 259 AND 295...I-78 BETWEEN
MILE MARKERS 0 AND 8...I-81 BETWEEN MILE MARKERS 86 AND 96...I-83
BETWEEN MILE MARKERS 1 AND 17.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS LINE OF SEVERE THUNDERSTORMS HAS A HISTORY OF PRODUCING WIND 
DAMAGE ACROSS YORK COUNTY DURING THE PAST 45 MINUTES. DO NOT STAY 
OUTDOORS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS 
LINE OF SEVERE THUNDERSTORMS. WHEN THUNDER ROARS...MOVE INDOORS! 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

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 900 PM EDT SUNDAY
EVENING FOR SOUTH CENTRAL PENNSYLVANIA.

&&

LAT...LON 3996 7668 4019 7661 4020 7657 4023 7658
      4053 7658 4055 7653 4037 7621 4013 7587
      4011 7593 4004 7593 3996 7599 3987 7598
      3972 7610 3971 7682
TIME...MOT...LOC 2015Z 265DEG 28KT 4051 7644 4031 7640
          4012 7636 3995 7642 3973 7655

$$

FORECASTER: LAMBERT
1 follow-up statement
444 
WWUS51 KCTP 052102
SVSCTP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
502 PM EDT SUN AUG 5 2012

PAC075-052112-
/O.CAN.KCTP.SV.W.0182.000000T0000Z-120805T2115Z/
LEBANON PA-
502 PM EDT SUN AUG 5 2012

...THE SEVERE THUNDERSTORM WARNING FOR LEBANON COUNTY 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 900 PM EDT SUNDAY
EVENING FOR SOUTH CENTRAL PENNSYLVANIA.

LAT...LON 3995 7637 4007 7629 4021 7629 4028 7626
      4032 7615 4014 7588 4011 7593 4004 7593
      3996 7599 3987 7598 3985 7601 3984 7601
      3972 7610 3972 7643
TIME...MOT...LOC 2102Z 275DEG 26KT 4026 7601 3998 7609
          3970 7626

$$

PAC071-133-052115-
/O.CON.KCTP.SV.W.0182.000000T0000Z-120805T2115Z/
LANCASTER PA-YORK PA-
502 PM EDT SUN AUG 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTHEASTERN YORK AND EASTERN LANCASTER COUNTIES...

AT 459 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 ADAMSTOWN TO PARADISE TO DELTA...MOVING EAST AT 30
MPH.

LOCATIONS IN THE WARNING INCLUDE...
  WAKEFIELD AND GAP...

THIS WILL IMPACT THE PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 275
AND 295.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. 
MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE 
KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH 
TO BE STRUCK BY LIGHTNING.

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 900 PM EDT SUNDAY
EVENING FOR SOUTH CENTRAL PENNSYLVANIA.

&&

LAT...LON 3995 7637 4007 7629 4021 7629 4028 7626
      4032 7615 4014 7588 4011 7593 4004 7593
      3996 7599 3987 7598 3985 7601 3984 7601
      3972 7610 3972 7643
TIME...MOT...LOC 2102Z 275DEG 26KT 4026 7601 3998 7609
          3970 7626

$$

FORECASTER: LAMBERT

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 2:09 PM EDTSpecial Weather StatementCTPFranklin, Fulton66 min
Aug 5, 2:21 PM EDTSpecial Weather StatementCTPMontour, Northumberland, Snyder39 min
Aug 5, 2:28 PM EDTSpecial Weather StatementCTPLycoming, Sullivan47 min
Aug 5, 2:56 PM EDTSpecial Weather StatementCTPColumbia, Montour, Northumberland, Snyder, Union64 min
Aug 5, 3:01 PM EDTSpecial Weather StatementCTPAdams, Cumberland59 min
Aug 5, 3:15 PM EDTSpecial Weather StatementCTPSullivan60 min
Aug 5, 3:38 PM EDTSevere Thunderstorm WarningCTPAdams, Cumberland, Dauphin, Lancaster, Lebanon, Perry and 1 more82 min
Aug 5, 3:48 PM EDTSpecial Weather StatementCTPSchuylkill57 min
Aug 5, 4:00 PM EDTSevere Thunderstorm WarningCTPColumbia, Schuylkill60 min
Aug 5, 4:10 PM EDTAreal Flood AdvisoryCTPAdams, Cumberland, Dauphin, Lancaster, Lebanon, York3 hr

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.