Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 134, NWS State College, PA

July 19, 2013Adams County, Franklin County, York County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 19, 2013, 6:59 PM EDT for Adams County, Franklin County, York County, Pennsylvania. It was in force for 76 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: Jul 19, 2013, 6:59 PM EDT (22:59 UTC)
Expired: Jul 19, 2013, 8:15 PM EDT
In force: 76 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Adams County, PA, Franklin County, PA, York County, PA

The radar

The Sterling radar (KLWX), 106 km from the middle of the area, began a volume at 22:59 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 nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.0 hours before the alert went out and 108 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: 2923 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 1051 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 19, 6:14 PM EDT, 45 minutes earlier.

Area forecast discussion, Jul 19, 6:14 PM EDT, 45 minutes before

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Hazardous weather outlook, Jul 19, 4:18 AM EDT, 14 hours 41 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
418 AM EDT FRI JUL 19 2013

PAZ004>006-010>012-017-018-024-025-033-034-200830-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-CAMBRIA-BLAIR-SOMERSET-BEDFORD-
418 AM EDT FRI JUL 19 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT.

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

A STRONG COLD FRONT WILL MOVE ACROSS THE AREA SATURDAY. STRONG TO
POTENTIALLY SEVERE THUNDERSTORMS WILL PRECEDE AND ACCOMPANY THIS
FRONTAL PASSAGE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ019-026>028-035>037-041-042-045-046-049>053-056>059-063>066-
200830-
SOUTHERN CENTRE-HUNTINGDON-MIFFLIN-JUNIATA-FULTON-FRANKLIN-TIOGA-
NORTHERN LYCOMING-SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-
SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-
LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER-
418 AM EDT FRI JUL 19 2013

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS
EVENING...

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.

   HEAT ADVISORY.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

A STRONG COLD FRONT WILL MOVE ACROSS THE AREA SATURDAY. STRONG TO
POTENTIALLY SEVERE THUNDERSTORMS WILL PRECEDE AND ACCOMPANY THIS
FRONTAL PASSAGE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jul 19, 3:18 PM EDT, 3 hours 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
318 PM EDT FRI JUL 19 2013

PAZ033-034-192015-
BEDFORD PA-SOMERSET PA-
318 PM EDT FRI JUL 19 2013

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN SOMERSET AND
SOUTHWESTERN BEDFORD COUNTIES THROUGH 415 PM EDT...

AT 316 PM EDT...A STRONG THUNDERSTORM WAS NEAR GRANTSVILLE...MOVING
EAST AT 20 MPH.

WIND GUSTS TO 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM.
EXPECT FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING FROM THIS
STORM. DO NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN
LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES.
THIS STORM WILL AFFECT SALISBURY...MEYERSDALE...CALLIMONT...
WELLERSBURG AND LAKE GORDON.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 219...ROUTE 220.

LAT...LON 3972 7930 3975 7931 3982 7926 3988 7864
      3972 7866

FORECASTER: LAMBERT

Special weather statement, Jul 19, 3:50 PM EDT, 3 hours 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
350 PM EDT FRI JUL 19 2013

PAZ024-033-192100-
CAMBRIA PA-SOMERSET PA-
350 PM EDT FRI JUL 19 2013

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL SOMERSET AND
SOUTHWESTERN CAMBRIA COUNTIES BETWEEN 415 PM AND 5 PM EDT...

AT 346 PM EDT...A STRONG THUNDERSTORM WAS NEAR YOUNGSTOWN...MOVING
EAST AT 20 MPH.

WIND GUSTS TO 50 MPH AND UP TO PENNY SIZE HAIL ARE POSSIBLE WITH
THIS STORM. EXPECT FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING
FROM THIS STORM. DO NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER
TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM
APPROACHES. THIS STORM WILL AFFECT JENNERSTOWN...JEROME...TIRE HILL
AND FERNDALE.

OTHER NOTABLE LOCATIONS IMPACTED WILL BE... JOHNSTOWN FLOOD NATIONAL
MEMORIAL HISTORIC SITE.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...THE JOHNSTOWN
EXPRESSWAY...ROUTE 30...ROUTE 219...STATE ROAD 56.

LAT...LON 4019 7913 4020 7913 4022 7911 4031 7905
      4036 7900 4040 7898 4042 7887 4014 7884
      4013 7917 4015 7917

FORECASTER: LAMBERT

Special weather statement, Jul 19, 4:12 PM EDT, 2 hours 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
412 PM EDT FRI JUL 19 2013

PAZ056-057-063-065-192115-
CUMBERLAND PA-DAUPHIN PA-PERRY PA-YORK PA-
412 PM EDT FRI JUL 19 2013

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CUMBERLAND...DAUPHIN...
EAST CENTRAL PERRY AND NORTHWESTERN YORK COUNTIES THROUGH 515 PM
EDT...

AT 406 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM AMITY
HALL TO ENOLA TO PENN STATE DICKINSON SCHOOL OF LAW TO NEWBURG...
MOVING EAST AT 20 MPH.

WIND GUSTS TO 45 MPH AND DIME SIZE HAIL ARE POSSIBLE WITH SOME OF
THESE STORMS. ALSO EXPECT FREQUENT...DANGEROUS CLOUD TO GROUND
LIGHTNING FROM THESE STORMS. DO NOT STAY IN THE OPEN NOR SEEK
SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A
THUNDERSTORM APPROACHES. THESE STORMS WILL AFFECT HALIFAX...
ROCKVILLE...DAUPHIN...AND WEST FAIRVIEW...HARRISBURG...ELLENDALE
FORGE...WORMLEYSBURG...AND MECHANICSBURG...CITY ISLAND AND PROGRESS.

OTHER NOTABLE LOCATIONS IMPACTED WILL BE... HARRISBURG INTERNATIONAL
AIRPORT...HERSHEY PARK...CITY ISLAND...MESSIAH COLLEGE...PENN STATE
COLLEGE OF MEDICINE AND PENN STATE DICKINSON SCHOOL OF LAW.

LAT...LON 4009 7755 4012 7756 4014 7760 4023 7742
      4049 7704 4058 7666 4050 7663 4048 7668
      4031 7661 4023 7670 4010 7703

FORECASTER: LAMBERT

Local storm report, Jul 19, 5:10 PM EDT, 1 hour 49 minutes before

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Special weather statement, Jul 19, 5:18 PM EDT, 1 hour 41 minutes before

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Local storm report, Jul 19, 5:45 PM EDT, 1 hour 14 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 12:33 PM EDT	Special Weather Statement	CTP	Lancaster	42 min
Jul 19, 2:01 PM EDT	Special Weather Statement	CTP	Lebanon	29 min
Jul 19, 2:11 PM EDT	Special Weather Statement	CTP	Somerset	34 min
Jul 19, 2:25 PM EDT	Special Weather Statement	CTP	Warren	35 min
Jul 19, 3:12 PM EDT	Special Weather Statement	CTP	Warren	48 min
Jul 19, 3:18 PM EDT	Special Weather Statement	CTP	Somerset	57 min
Jul 19, 3:50 PM EDT	Special Weather Statement	CTP	Somerset	70 min
Jul 19, 4:12 PM EDT	Special Weather Statement	CTP	Cumberland, Dauphin	63 min
Jul 19, 4:28 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Perry	62 min
Jul 19, 5:11 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon	64 min
Jul 19, 5:18 PM EDT	Special Weather Statement	CTP	Franklin	57 min
Jul 19, 5:44 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, York	91 min
Jul 19, 6:28 PM EDT	Areal Flood Advisory	CTP	Franklin	3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2013 Every 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.