Alert archive / Pennsylvania / Special Weather Statements in 2017

Special Weather Statement, NWS State College, PA

April 20, 2017Elk County, Pennsylvania

NWS State College, PA issued this special weather statement at Apr 20, 2017, 4:03 PM EDT for Elk County, Pennsylvania. It was in force for 27 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: Apr 20, 2017, 4:03 PM EDT (20:03 UTC)
Expired: Apr 20, 2017, 4:30 PM EDT
In force: 27 min
Issued by: NWS State College, PA

County Elk County, PA

The radar

The State College radar (KCCX), 69 km from the middle of the area, began a volume at 20:03 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

Pittsburgh, PA (KAGC), launched 12:00Z, 8.1 hours before the alert went out and 165 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: 59 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 791 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 186 m²/s²
0-3 km storm-relative helicity: 182 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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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 20, 3:35 PM EDT, 28 minutes earlier.

Area forecast discussion, Apr 20, 3:35 PM EDT, 28 minutes before

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Hazardous weather outlook, Apr 20, 6:27 AM EDT, 9 hours 36 minutes before

Hazardous Weather Outlook
National Weather Service State College PA
627 AM EDT Thu Apr 20 2017

PAZ026>028-034>036-049>053-056>059-063>066-211030-
Huntingdon-Mifflin-Juniata-Bedford-Fulton-Franklin-Union-Snyder-
Montour-Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-
Cumberland-Adams-York-Lancaster-
627 AM EDT Thu Apr 20 2017

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ004>006-010>012-017>019-024-025-033-037-041-042-045-046-211030-
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Southern Centre-Cambria-Blair-Somerset-Tioga-
Northern Lycoming-Sullivan-Southern Clinton-Southern Lycoming-
627 AM EDT Thu Apr 20 2017

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and Tonight.

Scattered severe thunderstorms with damaging winds 60 mph or greater
and large hail exceeding 1 inch in diameter are possible late today
or this evening.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Apr 20, 1:40 PM EDT, 2 hours 23 minutes before

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Special weather statement, Apr 20, 2:12 PM EDT, 1 hour 51 minutes before

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Special weather statement, Apr 20, 3:23 PM EDT, 40 minutes before

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Special weather statement, Apr 20, 3:51 PM EDT, 12 minutes before

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Special weather statement, Apr 20, 4:03 PM EDT, 0 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
Apr 20, 1:40 PM EDT	Special Weather Statement	CTP	Fulton	35 min
Apr 20, 2:12 PM EDT	Special Weather Statement	CTP	Franklin	33 min
Apr 20, 3:23 PM EDT	Special Weather Statement	CTP	Cambria, Somerset	52 min
Apr 20, 3:51 PM EDT	Special Weather Statement	CTP	Huntingdon	39 min
Apr 20, 4:06 PM EDT	Special Weather Statement	CTP	Bedford	54 min
Apr 20, 4:52 PM EDT	Special Weather Statement	CTP	Franklin, Fulton	53 min
Apr 20, 5:18 PM EDT	Special Weather Statement	CTP	McKean	57 min
Apr 20, 5:30 PM EDT	Special Weather Statement	CTP	Clinton	60 min
Apr 20, 6:02 PM EDT	Special Weather Statement	CTP	Franklin	28 min
Apr 20, 6:28 PM EDT	Special Weather Statement	CTP	Warren	62 min
Apr 20, 6:33 PM EDT	Special Weather Statement	CTP	Adams	27 min
Apr 20, 7:08 PM EDT	Severe Thunderstorm Warning	CTP	Warren	67 min
Apr 20, 7:22 PM EDT	Special Weather Statement	CTP	Adams	38 min
Apr 20, 7:55 PM EDT	Tornado Warning Tornado observed	CTP	Warren	35 min

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.