Alert archive / Pennsylvania / Freeze Warnings in 2013

Freeze Warning 4, NWS State College, PA

May 25, 201313 counties in Pennsylvania

NWS State College, PA issued this freeze warning at May 25, 2013, 2:00 PM EDT for 13 counties in Pennsylvania. It took effect at May 26, 2013, 2:00 AM EDT. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 25, 2013, 2:00 PM EDT (18:00 UTC)
In effect from: May 26, 2013, 2:00 AM EDT
Expired: May 26, 2013, 8:00 AM EDT
In force: 6 hr
Issued by: NWS State College, PA

Counties Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Elk County, PA, Lycoming County, PA, McKean County, PA, Potter County, PA, Somerset County, PA, Sullivan County, PA, Tioga County, PA, Warren County, PA

The radar

The State College radar (KCCX), 38 km from the middle of the area, began a volume at 18:00 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 6.0 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1168 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 3 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 freeze 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 freeze warning went out at May 25, 10:25 AM EDT, 3 hours 35 minutes earlier.

Area forecast discussion, May 25, 10:25 AM EDT, 3 hours 35 minutes before

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Hazardous weather outlook, May 25, 7:52 AM EDT, 6 hours 8 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
May 25, 3:34 AM EDT	Freeze Watch	CTP	Cambria, Cameron, Centre, Clearfield, Clinton, Elk and 7 more	10 hr
May 25, 6:44 AM EDT	Red Flag Warning	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more	12 hr

Nearby

Freeze Warnings in Pennsylvania, 2013 Every freeze 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.