Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 185, NWS State College, PA

September 12, 2013Lancaster County, York County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Sep 12, 2013, 4:43 PM EDT for Lancaster County, York County, Pennsylvania. It was in force for 77 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: Sep 12, 2013, 4:43 PM EDT (20:43 UTC)
Expired: Sep 12, 2013, 6:00 PM EDT
In force: 77 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Lancaster County, PA, York County, PA

The radar

The Sterling radar (KLWX), 141 km from the middle of the area, began a volume at 20:43 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.

Issued	Product	Office	Lasted
Sep 12, 12:37 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.7 hours before the alert went out and 66 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: 1009 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 970 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 39 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 Sep 12, 4:05 PM EDT, 38 minutes earlier.

Area forecast discussion, Sep 12, 4:05 PM EDT, 38 minutes before

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Hazardous weather outlook, Sep 12, 12:39 PM EDT, 4 hours 4 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1239 PM EDT THU SEP 12 2013

PAZ005-006-010>012-017>019-024>028-033>037-041-042-045-046-049>053-
056>059-063>066-131645-
MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-
JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-TIOGA-NORTHERN LYCOMING-
SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-
NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-
ADAMS-YORK-LANCASTER-
1239 PM EDT THU SEP 12 2013

...SEVERE THUNDERSTORM WATCH 523 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

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

   SEVERE THUNDERSTORM WATCH.

BRIEF HEAVY RAIN MAY CREATE MINOR FLOODING IN AREAS WHICH RECEIVED
HEAVY RAIN ON WEDNESDAY.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ004-131645-
WARREN-
1239 PM EDT THU SEP 12 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Sep 12, 2:35 PM EDT, 2 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
235 PM EDT THU SEP 12 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0220 PM     TSTM WND DMG     1 ENE LYONSTOWN         40.94N  77.73W
09/12/2013                   CENTRE             PA   FIRE DEPT/RESCUE

            TREES AND WIRES DOWN ON JACKSONVILLE ROAD

&&

EVENT NUMBER CTP1300415

TYBURSKI

Special weather statement, Sep 12, 2:35 PM EDT, 2 hours 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
235 PM EDT THU SEP 12 2013

PAZ019-026>028-049-050-056-057-121930-
DAUPHIN PA-HUNTINGDON PA-JUNIATA PA-MIFFLIN PA-PERRY PA-SNYDER PA-
SOUTHERN CENTRE PA-UNION PA-
235 PM EDT THU SEP 12 2013

...STRONG THUNDERSTORMS WILL AFFECT JUNIATA...MIFFLIN...NORTHEASTERN
HUNTINGDON...NORTHERN PERRY...NORTHWESTERN DAUPHIN...SNYDER...
SOUTHEASTERN CENTRE AND SOUTHERN UNION COUNTIES...

AN AREA OF STRONG THUNDERSTORMS COVERED PORTIONS OF CENTRE...
DAUPHIN...HUNTINGDON...JUNIATA...MIFFLIN...PERRY...SNYDER AND UNION
COUNTIES AT 232 PM EDT. THE STRONG THUNDERSTORMS WERE GENERALLY
MOVING EAST AT 30 MPH.

WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STRONG
THUNDERSTORMS.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 11/15...ROUTE
22/522...ROUTE 209...ROUTE 322...ROUTE 322/22...ROUTE 522...STATE
ROAD 45.

LAT...LON 4074 7779 4097 7692 4067 7691 4063 7695
      4061 7693 4061 7691 4044 7690 4040 7777

FORECASTER: CERU

Special weather statement, Sep 12, 3:34 PM EDT, 1 hour 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
334 PM EDT THU SEP 12 2013

PAZ065-066-122030-
LANCASTER PA-YORK PA-
334 PM EDT THU SEP 12 2013

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN YORK AND SOUTHERN
LANCASTER COUNTIES...

AT 332 PM EDT...A STRONG THUNDERSTORM WAS NEAR FELTON...MOVING EAST
AT 20 MPH.

WIND GUSTS TO 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS STORM.
EXPECT INTENSE 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 BROGUE...
SUNNYBURN...HOLTWOOD...SMITHVILLE AND QUARRYVILLE.

OTHER NOTABLE LOCATIONS IMPACTED WILL BE... DUTCH WONDERLAND...
MILLERSVILLE UNIVERSITY AND FRANKLIN AND MARSHALL COLLEGE.

THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 30...ROUTE 222...
ROUTE 322...STATE ROAD 41.

LAT...LON 3997 7660 4013 7619 4017 7591 4014 7587
      4011 7593 4004 7593 3996 7599 3987 7598
      3985 7601 3983 7601 3979 7604 3972 7610
      3972 7663

FORECASTER: CERU

Local storm report, Sep 12, 3:50 PM EDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
350 PM EDT THU SEP 12 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 PM     TSTM WND DMG     SOUTH WILLIAMSPORT      41.23N  77.00W
09/12/2013                   LYCOMING           PA   FIRE DEPT/RESCUE

            TREE DOWN ON CAR ON ROUTE 654 NO INJURIES

&&

EVENT NUMBER CTP1300416

TYBURSKI

Local storm report, Sep 12, 3:51 PM EDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
351 PM EDT THU SEP 12 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0125 PM     TSTM WND DMG     1 ENE BRIDGEPORT        40.98N  78.54W
09/12/2013                   CLEARFIELD         PA   911 CALL CENTER

            TREES BLOCKING CURWENSVILLE GRAMPIAN HIGHWAY

0130 PM     TSTM WND DMG     1 SE BRIDGEPORT         40.97N  78.54W
09/12/2013                   CLEARFIELD         PA   FIRE DEPT/RESCUE

            TREES DOWN ALONG WINDY HILL ROAD

0135 PM     TSTM WND DMG     1 S KREBS               40.97N  78.41W
09/12/2013                   CLEARFIELD         PA   FIRE DEPT/RESCUE

            WIRES DOWN ON OLD ERIE PIKE

0145 PM     TSTM WND DMG     1 NNW MADERA            40.84N  78.44W
09/12/2013                   CLEARFIELD         PA   FIRE DEPT/RESCUE

            WIRES DOWN ACROSS SPRUCE STREET

0151 PM     TSTM WND DMG     BIGLER                  40.98N  78.31W
09/12/2013                   CLEARFIELD         PA   FIRE DEPT/RESCUE

            WIRES DOWN ON BIGLER ROAD

0220 PM     TSTM WND DMG     1 ENE LYONSTOWN         40.94N  77.73W
09/12/2013                   CENTRE             PA   FIRE DEPT/RESCUE

            TREES AND WIRES DOWN ON JACKSONVILLE ROAD

0330 PM     TSTM WND DMG     SOUTH WILLIAMSPORT      41.23N  77.00W
09/12/2013                   LYCOMING           PA   FIRE DEPT/RESCUE

            TREE DOWN ON CAR ON ROUTE 654 NO INJURIES

&&

EVENT NUMBER CTP1300410 CTP1300411 CTP1300412 CTP1300414 CTP1300413
CTP1300415 CTP1300416

TYBURSKI

Local storm report, Sep 12, 4:03 PM EDT, 40 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
Sep 11, 8:21 PM EDT	Special Weather Statement	CTP	Potter	24 min
Sep 11, 8:59 PM EDT	Special Weather Statement	CTP	Potter	61 min
Sep 12, 9:59 AM EDT	Special Weather Statement	CTP	Lancaster, York	31 min
Sep 12, 12:47 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Clearfield	43 min
Sep 12, 12:57 PM EDT	Special Weather Statement	CTP	Potter	33 min
Sep 12, 1:03 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	57 min
Sep 12, 1:17 PM EDT	Special Weather Statement	CTP	Cameron, Elk	43 min
Sep 12, 1:27 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Centre, Clearfield, Huntingdon	48 min
Sep 12, 1:52 PM EDT	Special Weather Statement	CTP	Potter	38 min
Sep 12, 2:00 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clinton, Lycoming, Union	60 min
Sep 12, 2:27 PM EDT	Special Weather Statement	CTP	Potter, Tioga	48 min
Sep 12, 2:35 PM EDT	Special Weather Statement	CTP	Juniata, Mifflin, Snyder	55 min
Sep 12, 2:41 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Dauphin, Juniata, Mifflin, Perry, Snyder and 1 more	64 min
Sep 12, 2:56 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Columbia, Lycoming, Montour, Northumberland and 4 more	64 min
Sep 12, 3:28 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Cumberland, Dauphin, Franklin, Juniata, Lancaster and 8 more	47 min
Sep 12, 3:34 PM EDT	Special Weather Statement	CTP	Lancaster	56 min
Sep 12, 3:38 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	67 min
Sep 12, 3:51 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Lancaster, York	84 min
Sep 12, 4:02 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Sullivan	58 min
Sep 12, 4:08 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Cumberland, Dauphin, Lancaster, Lebanon, Montour and 4 more	52 min
Sep 12, 4:59 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	31 min
Sep 12, 5:09 PM EDT	Areal Flood Advisory	CTP	Dauphin, Lancaster, Lebanon, York	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.