Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 14, NWS Pittsburgh, PA

March 1, 2017Clarion County, Forest County, Venango County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Mar 1, 2017, 5:22 PM EST for Clarion County, Forest County, Venango County, Pennsylvania. It was in force for 23 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: Mar 1, 2017, 5:22 PM EST (22:22 UTC)
Expired: Mar 1, 2017, 5:45 PM EST
In force: 23 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Clarion County, PA, Forest County, PA, Venango County, PA

The radar

The Pittsburgh radar (KPBZ), 112 km from the middle of the area, began a volume at 22:24 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, 10.4 hours before the alert went out and 119 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: 991 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 605 m²/s²
0-3 km storm-relative helicity: 588 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 Pittsburgh, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 1, 4:30 PM EST, 52 minutes earlier.

Area forecast discussion, Mar 1, 4:30 PM EST, 52 minutes before

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Hazardous weather outlook, Mar 1, 12:47 PM EST, 4 hours 35 minutes before

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In the hours before

Local storm report, Mar 1, 1:09 PM EST, 4 hours 13 minutes before

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Local storm report, Mar 1, 1:14 PM EST, 4 hours 8 minutes before

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Local storm report, Mar 1, 1:28 PM EST, 3 hours 54 minutes before

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Local storm report, Mar 1, 1:56 PM EST, 3 hours 26 minutes before

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Special weather statement, Mar 1, 3:38 PM EST, 1 hour 44 minutes before

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Special weather statement, Mar 1, 4:26 PM EST, 56 minutes before

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The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 1, 12:51 AM EST	Flash Flood Watch	PBZ	Allegheny, Beaver, Fayette, Greene, Washington, Westmoreland	12 hr
Mar 1, 3:01 AM EST	Special Weather Statement	PBZ	Mercer, Venango	44 min
Mar 1, 4:06 AM EST	Special Weather Statement	PBZ	Greene, Washington	39 min
Mar 1, 4:25 AM EST	Special Weather Statement	PBZ	Beaver, Butler, Lawrence, Mercer	50 min
Mar 1, 5:02 AM EST	Severe Thunderstorm Warning	PBZ	Fayette	28 min
Mar 1, 5:26 AM EST	Special Weather Statement	PBZ	Fayette, Greene	49 min
Mar 1, 6:13 AM EST	Special Weather Statement	PBZ	Westmoreland	32 min
Mar 1, 7:56 AM EST	Areal Flood Warning	PBZ	Fayette, Greene, Washington, Westmoreland	9 hr
Mar 1, 8:15 AM EST	Severe Thunderstorm Warning	PBZ	Allegheny, Fayette, Greene, Washington, Westmoreland	35 min
Mar 1, 9:44 AM EST	Tornado Warning	PBZ	Greene, Washington	31 min
Mar 1, 10:17 AM EST	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington, Westmoreland	43 min
Mar 1, 11:00 AM EST	Special Weather Statement	PBZ	Fayette	45 min
Mar 1, 11:11 AM EST	Severe Thunderstorm Warning	PBZ	Fayette	49 min
Mar 1, 11:36 AM EST	Areal Flood Advisory	PBZ	Allegheny, Indiana, Washington, Westmoreland	3 hr
Mar 1, 12:44 PM EST	Wind Advisory	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 8 more	17 hr
Mar 1, 4:26 PM EST	Special Weather Statement	PBZ	Mercer	64 min
Mar 1, 5:00 PM EST	Areal Flood Warning	PBZ	Fayette, Greene, Washington, Westmoreland	6 hr
Mar 1, 5:26 PM EST	Special Weather Statement	PBZ	Beaver, Butler, Lawrence, Mercer, Venango, Washington	49 min
Mar 1, 2:56 AM EST	Special Weather Statement	PBZ	Coshocton, Harrison, Tuscarawas	49 min
Mar 1, 7:35 AM EST	Areal Flood Warning	PBZ	Belmont, Guernsey, Monroe, Muskingum, Noble	36 hr
Mar 1, 9:00 AM EST	Severe Thunderstorm Warning	PBZ	Belmont, Monroe, Noble	45 min
Mar 1, 9:36 AM EST	Tornado Warning	PBZ	Belmont, Monroe	9 min
Mar 1, 10:44 AM EST	Flash Flood Warning	PBZ	Belmont	3 hr
Mar 1, 3:38 PM EST	Special Weather Statement	PBZ	Coshocton, Muskingum, Tuscarawas	52 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2017 Every severe thunderstorm warning 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.