Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 206, NWS State College, PA

November 18, 2013Columbia County, Lycoming County, Sullivan County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Nov 18, 2013, 1:09 AM EST for Columbia County, Lycoming County, Sullivan County, 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: Nov 18, 2013, 1:09 AM EST (06:09 UTC)
Expired: Nov 18, 2013, 2:15 AM EST
In force: 66 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Columbia County, PA, Lycoming County, PA, Sullivan County, PA

The radar

The Binghamton radar (KBGM), 117 km from the middle of the area, began a volume at 06:10 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
Nov 17, 11:06 PM EST	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 6.2 hours before the alert went out and 249 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 940 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 325 m²/s²
0-3 km storm-relative helicity: 351 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 Nov 18, 12:42 AM EST, 27 minutes earlier.

Area forecast discussion, Nov 18, 12:42 AM EST, 27 minutes before

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Hazardous weather outlook, Nov 18, 12:42 AM EST, 27 minutes before

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In the hours before

Local storm report, Nov 17, 11:26 PM EST, 1 hour 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1126 PM EST SUN NOV 17 2013

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

1051 PM     TSTM WND DMG     RIDGWAY                 41.43N  78.73W
11/17/2013                   ELK                PA   911 CALL CENTER

            TREES REPORTED DOWN COUNTYWIDE.

&&

EVENT NUMBER CTP1300507

EVANEGO

Local storm report, Nov 17, 11:40 PM EST, 1 hour 29 minutes before

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Local storm report, Nov 17, 11:56 PM EST, 1 hour 13 minutes before

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Local storm report, Nov 18, 12:12 AM EST, 57 minutes before

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Local storm report, Nov 18, 12:13 AM EST, 56 minutes before

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Local storm report, Nov 18, 12:33 AM EST, 36 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
Nov 17, 9:07 PM EST	Special Weather Statement	CTP	Cambria	23 min
Nov 17, 10:07 PM EST	Special Weather Statement	CTP	McKean, Warren	38 min
Nov 17, 10:24 PM EST	Severe Thunderstorm Warning	CTP	Cameron, Elk, McKean, Potter	81 min
Nov 17, 10:42 PM EST	Severe Thunderstorm Warning	CTP	Cambria, Clearfield, Somerset	63 min
Nov 17, 10:57 PM EST	Special Weather Statement	CTP	McKean	33 min
Nov 17, 11:38 PM EST	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton, Lycoming, Potter and 1 more	52 min
Nov 17, 11:41 PM EST	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Clearfield, Franklin, Fulton and 3 more	64 min
Nov 18, 12:20 AM EST	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Mifflin, Montour, Northumberland and 3 more	70 min
Nov 18, 12:36 AM EST	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Franklin, Juniata, Mifflin, Perry and 1 more	54 min
Nov 18, 1:22 AM EST	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Lycoming, Montour, Northumberland, Schuylkill	53 min
Nov 18, 1:25 AM EST	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, Schuylkill, York	80 min
Nov 18, 1:56 AM EST	Special Weather Statement	CTP	Lancaster, York	49 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.