Alert archive / Pennsylvania / Special Weather Statements in 2017

Special Weather Statement, NWS State College, PA

December 25, 2017Juniata County, Mifflin County, Perry County, Pennsylvania

NWS State College, PA issued this special weather statement at Dec 25, 2017, 7:49 AM EST for Juniata County, Mifflin County, Perry County, Pennsylvania. It was in force for 71 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Dec 25, 2017, 7:49 AM EST (12:49 UTC)
Expired: Dec 25, 2017, 9:00 AM EST
In force: 71 min
Issued by: NWS State College, PA

Counties Juniata County, PA, Mifflin County, PA, Perry County, PA

The radar

The State College radar (KCCX), 41 km from the middle of the area, began a volume at 12:49 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 nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 0.8 hours before the alert went out and 272 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: 609 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -66 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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
Dec 25, 2:11 AM EST	Special Weather Statement	CTP	Cambria, Clearfield	79 min
Dec 25, 2:49 AM EST	Special Weather Statement	CTP	Blair, Cameron, Centre, Clinton, Huntingdon, Mifflin	71 min
Dec 25, 4:20 AM EST	Special Weather Statement	CTP	Columbia, Montour, Northumberland, Union	55 min
Dec 25, 1:42 PM EST	Winter Weather Advisory	CTP	McKean, Warren	48 hr

Nearby

Special Weather Statements in Pennsylvania, 2017 Every special weather statement in 2017

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.