Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 279, NWS State College, PA

October 31, 20194 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Oct 31, 2019, 6:27 PM EDT for 4 counties in Pennsylvania. It was in force for 63 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: Oct 31, 2019, 6:27 PM EDT (22:27 UTC)
Expired: Oct 31, 2019, 7:30 PM EDT
In force: 63 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

Counties Adams County, PA, Cumberland County, PA, Franklin County, PA, Perry County, PA

The radar

The State College radar (KCCX), 107 km from the middle of the area, began a volume at 22:27 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
Oct 31, 2:56 PM EDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.5 hours before the alert went out and 127 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: 489 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 280 m²/s²
0-3 km storm-relative helicity: 246 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 Oct 31, 6:06 PM EDT, 21 minutes earlier.

Area forecast discussion, Oct 31, 6:06 PM EDT, 21 minutes before

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Hazardous weather outlook, Oct 31, 3:35 PM EDT, 2 hours 52 minutes before

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In the hours before

Special weather statement, Oct 31, 4:39 PM EDT, 1 hour 48 minutes before

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Special weather statement, Oct 31, 5:10 PM EDT, 1 hour 17 minutes before

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Special weather statement, Oct 31, 5:34 PM EDT, 53 minutes before

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Special weather statement, Oct 31, 5:36 PM EDT, 51 minutes before

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Special weather statement, Oct 31, 6:04 PM EDT, 23 minutes before

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Special weather statement, Oct 31, 6:11 PM EDT, 16 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
Oct 31, 4:32 AM EDT	Wind Advisory	CTP	Bedford, Blair, Cambria, Cameron, Centre, Clearfield and 17 more	29 hr
Oct 31, 4:07 PM EDT	Special Weather Statement	CTP	Bedford, Cambria, Clearfield, Somerset	53 min
Oct 31, 4:39 PM EDT	Special Weather Statement	CTP	Cameron, Clearfield	66 min
Oct 31, 5:10 PM EDT	Special Weather Statement	CTP	Potter	50 min
Oct 31, 5:34 PM EDT	Special Weather Statement	CTP	Franklin, Fulton	41 min
Oct 31, 5:36 PM EDT	Special Weather Statement	CTP	Cameron, Potter	24 min
Oct 31, 5:42 PM EDT	Severe Thunderstorm Warning	CTP	Franklin, Fulton	48 min
Oct 31, 5:53 PM EDT	Areal Flood Advisory	CTP	Cameron, Potter, Tioga	3 hr
Oct 31, 6:04 PM EDT	Special Weather Statement	CTP	Centre, Huntingdon	41 min
Oct 31, 6:11 PM EDT	Special Weather Statement	CTP	Tioga	49 min
Oct 31, 6:26 PM EDT	Areal Flood Advisory	CTP	Bedford, Franklin, Fulton, Huntingdon	3 hr
Oct 31, 6:55 PM EDT	Special Weather Statement	CTP	Juniata, Lycoming, Mifflin	50 min
Oct 31, 7:06 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	13 min
Oct 31, 7:08 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Franklin, Juniata, Lebanon and 4 more	67 min
Oct 31, 7:10 PM EDT	Areal Flood Advisory	CTP	Franklin	3 hr
Oct 31, 7:13 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	62 min
Oct 31, 7:50 PM EDT	Special Weather Statement	CTP	Sullivan	40 min
Oct 31, 7:58 PM EDT	Areal Flood Advisory	CTP	Adams, Cumberland, Dauphin, Lebanon, Perry, York	3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2019 Every severe thunderstorm warning in 2019

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.