Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 158, NWS State College, PA

September 2, 2013Clinton County, Lycoming County, Potter County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Sep 2, 2013, 4:29 PM EDT for Clinton County, Lycoming County, Potter County, Pennsylvania. It was in force for 61 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 2, 2013, 4:29 PM EDT (20:29 UTC)
Expired: Sep 2, 2013, 5:30 PM EDT
In force: 61 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Clinton County, PA, Lycoming County, PA, Potter County, PA

The radar

The State College radar (KCCX), 70 km from the middle of the area, began a volume at 20:29 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 2, 3:18 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.5 hours before the alert went out and 192 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: 1277 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 650 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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 2, 4:03 PM EDT, 26 minutes earlier.

Area forecast discussion, Sep 2, 4:03 PM EDT, 26 minutes before

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Hazardous weather outlook, Sep 2, 3:26 PM EDT, 1 hour 3 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
326 PM EDT MON SEP 2 2013

PAZ004>006-010>012-017>019-037-041-042-045-046-049>053-031930-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-TIOGA-NORTHERN LYCOMING-SULLIVAN-
SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-
NORTHUMBERLAND-COLUMBIA-
326 PM EDT MON SEP 2 2013

...SEVERE THUNDERSTORM WATCH 510 IN EFFECT UNTIL 10 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.

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

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ024>028-033>036-056>059-063>066-031930-
CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-SOMERSET-BEDFORD-FULTON-
FRANKLIN-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-ADAMS-YORK-
LANCASTER-
326 PM EDT MON SEP 2 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED SHOWERS AND THUNDERSTORMS CAN BE EXPECTED LATER TODAY
AND THIS EVENING. SOME STORMS COULD BE ACCOMPANIED BY STRONG
WINDS AND HEAVY RAIN.

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

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 2, 2:54 PM EDT, 1 hour 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
254 PM EDT MON SEP 02 2013

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

0253 PM     HAIL             ORMSBY                  41.81N  78.54W
09/02/2013  E1.00 INCH       MCKEAN             PA   TRAINED SPOTTER

&&

EVENT NUMBER CTP1300374

COLBERT

Local storm report, Sep 2, 3:50 PM EDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
350 PM EDT MON SEP 02 2013

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

0215 PM     HAIL             4 SW BRADFORD           41.92N  78.70W
09/02/2013  M1.00 INCH       MCKEAN             PA   SOCIAL MEDIA

            QUARTER-SIZED HAIL REPORTED SOUTHWEST OF BRADFORD.

&&

EVENT NUMBER CTP1300375

EVANEGO

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 9:12 PM EDT	Special Weather Statement	CTP	Columbia	33 min
Sep 1, 10:07 PM EDT	Special Weather Statement	CTP	Dauphin	23 min
Sep 1, 10:29 PM EDT	Special Weather Statement	CTP	Dauphin	46 min
Sep 1, 11:23 PM EDT	Special Weather Statement	CTP	Columbia	37 min
Sep 2, 12:50 AM EDT	Flash Flood Warning	CTP	Columbia	4 hr
Sep 2, 1:07 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Warren	83 min
Sep 2, 2:19 PM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean, Potter, Warren	56 min
Sep 2, 3:14 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Elk, McKean, Potter, Tioga	61 min
Sep 2, 3:43 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Elk, Potter	62 min
Sep 2, 4:53 PM EDT	Special Weather Statement	CTP	Elk	67 min
Sep 2, 5:25 PM EDT	Special Weather Statement	CTP	Cumberland	65 min
Sep 2, 5:32 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lancaster, York	58 min
Sep 2, 6:02 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Clearfield	58 min
Sep 2, 6:31 PM EDT	Severe Thunderstorm Warning	CTP	Lebanon	59 min
Sep 2, 6:50 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Clearfield	55 min
Sep 2, 7:03 PM EDT	Areal Flood Advisory	CTP	Cambria, Clearfield	3 hr
Sep 2, 7:10 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, Lebanon	65 min
Sep 2, 7:11 PM EDT	Special Weather Statement	CTP	Centre	49 min
Sep 2, 7:36 PM EDT	Flash Flood Warning	CTP	Cambria	3 hr
Sep 2, 7:55 PM EDT	Special Weather Statement	CTP	Blair, Cambria	65 min

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.