Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 191, NWS State College, PA

October 7, 20136 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Oct 7, 2013, 10:39 AM EDT for 6 counties in Pennsylvania. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 7, 2013, 10:39 AM EDT (14:39 UTC)
Expired
Oct 7, 2013, 11:45 AM EDT
In force
66 min
Issued by
NWS State College, PA
Area
Storm-based polygon

Counties Columbia County, PA, Lycoming County, PA, Montour County, PA, Northumberland County, PA, Snyder County, PA, Union County, PA

The radar

The State College radar (KCCX), 99 km from the middle of the area, began a volume at 14:40 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Oct 7, 8:56 AM EDTTornado WatchSPC8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 2.7 hours before the alert went out and 181 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, Phillips Aaf/Abe, MD at 12:00Z on 2013-10-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 114 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, Phillips Aaf/Abe, MD at 12:00Z on 2013-10-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 149 square meters per square second.19395878Sfc1 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
114 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
584 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
149 m²/s²
0-3 km storm-relative helicity
196 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 7, 9:35 AM EDT, 1 hour 4 minutes earlier.

Area forecast discussion, Oct 7, 9:35 AM EDT, 1 hour 4 minutes before
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Hazardous weather outlook, Oct 7, 9:08 AM EDT, 1 hour 31 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
908 AM EDT MON OCT 7 2013

PAZ004-005-010-011-017-024-025-033>035-081315-
WARREN-MCKEAN-ELK-CAMERON-CLEARFIELD-CAMBRIA-BLAIR-SOMERSET-BEDFORD-
FULTON-
908 AM EDT MON OCT 7 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

WEST WINDS IN THE WAKE OF THE COLD FRONT WILL GUST UP TO 35 MPH AT
TIMES THROUGH LATE THIS AFTERNOON. THE WIND WILL SUBSIDE THIS
EVENING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

PAZ006-012-018-019-026>028-036-037-041-042-045-046-049>053-056>059-
063>066-081315-
POTTER-NORTHERN CLINTON-NORTHERN CENTRE-SOUTHERN CENTRE-HUNTINGDON-
MIFFLIN-JUNIATA-FRANKLIN-TIOGA-NORTHERN LYCOMING-SULLIVAN-
SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-
NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-
ADAMS-YORK-LANCASTER-
908 AM EDT MON OCT 7 2013

...TORNADO WATCH 543 IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   TORNADO WATCH.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

LAMBERT

In the hours before

Special weather statement, Oct 7, 9:21 AM EDT, 1 hour 18 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
921 AM EDT MON OCT 7 2013

PAZ036-063>065-071430-
ADAMS PA-CUMBERLAND PA-FRANKLIN PA-YORK PA-
921 AM EDT MON OCT 7 2013

...STRONG WIND GUSTS AND BRIEF HEAVY RAINFALL WILL AFFECT
ADAMS...NORTHWESTERN YORK...SOUTH CENTRAL CUMBERLAND AND
SOUTHEASTERN FRANKLIN COUNTIES...

AT 917 AM EDT...AN AREA OF STRONG WIND GUSTS PRECEDING A LINE OF
SHOWERS WITH BRIEF HEAVY RAIN WAS MOVING INTO SOUTHERN FRANKLIN AND
ADAMS COUNTY FROM NORTHERN MARYLAND. SOUTH TO SOUTHEAST WINDS MAY
GUST TO 45 MPH AHEAD OF THE RAIN...AS THE LINE OF SHOWERS MOVES
NORTHEAST AT 45 MPH.

THE WIND GUSTS AND SHOWERS WILL AFFECT FAIRFIELD...ARENDTSVILLE...
PINE GROVE FURNACE AND DOVER.

OTHER NOTABLE LOCATIONS IMPACTED WILL BE... GETTYSBURG NATIONAL
MILITARY PARK...LIBERTY MOUNTAIN RESORT AND GETTYSBURG COLLEGE.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 15...ROUTE 30...
STATE ROAD 94...STATE ROAD 97.

LAT...LON 4013 7728 4001 7679 3971 7699 3972 7760

FORECASTER: DEVOIR
Special weather statement, Oct 7, 9:44 AM EDT, 55 minutes before
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Special weather statement, Oct 7, 9:48 AM EDT, 51 minutes before
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Local storm report, Oct 7, 10:23 AM EDT, 16 minutes before
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Special weather statement, Oct 7, 10:28 AM EDT, 11 minutes before
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Special weather statement, Oct 7, 10:28 AM EDT, 11 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Oct 7, 7:31 AM EDTSpecial Weather StatementCTPCameron, Clearfield59 min
Oct 7, 7:42 AM EDTSpecial Weather StatementCTPBedford, Blair63 min
Oct 7, 8:13 AM EDTSpecial Weather StatementCTPCentre, Clinton, Potter47 min
Oct 7, 8:17 AM EDTSpecial Weather StatementCTPBlair, Centre, Franklin, Fulton, Huntingdon, Mifflin58 min
Oct 7, 8:25 AM EDTSevere Thunderstorm WarningCTPCameron, Centre, Clinton, Lycoming, Potter, Tioga65 min
Oct 7, 8:50 AM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Huntingdon, Mifflin40 min
Oct 7, 8:57 AM EDTSevere Thunderstorm WarningCTPAdams, Cumberland, Franklin48 min
Oct 7, 8:58 AM EDTSpecial Weather StatementCTPClinton, Lycoming, Tioga47 min
Oct 7, 9:21 AM EDTSpecial Weather StatementCTPAdams69 min
Oct 7, 9:27 AM EDTSevere Thunderstorm WarningCTPTioga63 min
Oct 7, 9:44 AM EDTSpecial Weather StatementCTPJuniata, Lycoming, Snyder, Union46 min
Oct 7, 9:48 AM EDTSpecial Weather StatementCTPAdams, Cumberland, Juniata, Perry, York72 min
Oct 7, 10:28 AM EDTSpecial Weather StatementCTPMontour, Northumberland, Snyder, Sullivan, Union47 min
Oct 7, 11:00 AM EDTSpecial Weather StatementCTPLancaster, Lebanon, Schuylkill, York30 min
Oct 7, 11:11 AM EDTSpecial Weather StatementCTPSullivan34 min
Oct 7, 11:27 AM EDTSpecial Weather StatementCTPLancaster, Lebanon, Schuylkill48 min
Oct 7, 12:16 PM EDTSpecial Weather StatementCTPLancaster29 min
Oct 7, 12:44 PM EDTSpecial Weather StatementCTPLancaster31 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2013Every severe thunderstorm warning in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.