Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 19, NWS State College, PA

June 4, 2008Franklin County, Fulton County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 4, 2008, 1:47 PM EDT for Franklin County, Fulton County, Pennsylvania. It was in force for 43 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: Jun 4, 2008, 1:47 PM EDT (17:47 UTC)
Expired: Jun 4, 2008, 2:30 PM EDT
In force: 43 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Franklin County, PA, Fulton County, PA

The radar

The State College radar (KCCX), 111 km from the middle of the area, began a volume at 17:49 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
Jun 4, 12:49 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.8 hours before the alert went out and 117 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: 163 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 867 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 149 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 Jun 4, 10:45 AM EDT, 3 hours 2 minutes earlier.

Area forecast discussion, Jun 4, 10:45 AM EDT, 3 hours 2 minutes before

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Hazardous weather outlook, Jun 4, 1:12 PM EDT, 35 minutes before

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In the hours before

Special weather statement, Jun 4, 8:13 AM EDT, 5 hours 34 minutes before

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Special weather statement, Jun 4, 11:48 AM EDT, 1 hour 59 minutes before

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Special weather statement, Jun 4, 12:53 PM EDT, 54 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
Jun 4, 7:49 PM EDT	Areal Flood Advisory	CTP	McKean, Warren	3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2008 Every severe thunderstorm warning in 2008

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.