Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 27, NWS State College, PA

May 14, 2010Cameron County, Clearfield County, Elk County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 14, 2010, 6:04 AM EDT for Cameron County, Clearfield County, Elk County, Pennsylvania. It was in force for 41 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: May 14, 2010, 6:04 AM EDT (10:04 UTC)
Expired: May 14, 2010, 6:45 AM EDT
In force: 41 min
Issued by: NWS State College, PA
Area: Storm-based polygon

Counties Cameron County, PA, Clearfield County, PA, Elk County, PA

The radar

The State College radar (KCCX), 55 km from the middle of the area, began a volume at 10:04 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 (KPIT), launched 00:00Z, 10.1 hours before the alert went out and 170 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: 1061 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1042 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 452 m²/s²
0-3 km storm-relative helicity: 637 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 13.2

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 May 14, 5:18 AM EDT, 46 minutes earlier.

Area forecast discussion, May 14, 5:18 AM EDT, 46 minutes before

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Hazardous weather outlook, May 14, 5:38 AM EDT, 26 minutes before

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In the hours before

Special weather statement, May 14, 12:11 AM EDT, 5 hours 53 minutes before

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Special weather statement, May 14, 3:33 AM EDT, 2 hours 31 minutes before

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Special weather statement, May 14, 5:47 AM EDT, 17 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 14, 12:11 AM EDT	Special Weather Statement	CTP	Elk	49 min
May 14, 3:33 AM EDT	Special Weather Statement	CTP	Warren	27 min
May 14, 5:47 AM EDT	Special Weather Statement	CTP	Cameron, Clearfield, Elk	28 min
May 14, 6:35 AM EDT	Special Weather Statement	CTP	Clinton	25 min
May 14, 9:00 AM EDT	Special Weather Statement	CTP	Bedford	45 min
May 14, 11:50 AM EDT	Special Weather Statement	CTP	Bedford, Franklin	25 min
May 14, 12:52 PM EDT	Special Weather Statement	CTP	Cumberland	23 min
May 14, 1:10 PM EDT	Special Weather Statement	CTP	Franklin	35 min
May 14, 1:58 PM EDT	Special Weather Statement	CTP	Columbia, Montour, Union	32 min
May 14, 2:59 PM EDT	Special Weather Statement	CTP	Blair, Cambria, Huntingdon	46 min
May 14, 3:04 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Huntingdon	41 min
May 14, 3:19 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Huntingdon	41 min
May 14, 3:32 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Cambria, Huntingdon, Somerset	58 min
May 14, 3:55 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Huntingdon, Juniata, Mifflin, Perry	50 min
May 14, 4:20 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin, Huntingdon, Juniata, Perry	70 min
May 14, 4:24 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon, Perry, Schuylkill	57 min
May 14, 4:35 PM EDT	Special Weather Statement	CTP	Somerset	25 min
May 14, 4:40 PM EDT	Special Weather Statement	CTP	Fulton	35 min
May 14, 4:53 PM EDT	Special Weather Statement	CTP	Schuylkill	22 min
May 14, 4:58 PM EDT	Tornado Warning	CTP	Cumberland	32 min
May 14, 5:05 PM EDT	Special Weather Statement	CTP	Bedford	25 min
May 14, 5:15 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, York	45 min
May 14, 5:28 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	31 min
May 14, 5:30 PM EDT	Special Weather Statement	CTP	Fulton	30 min
May 14, 5:36 PM EDT	Areal Flood Advisory	CTP	Adams, Cumberland, York	3 hr
May 14, 5:41 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, York	64 min
May 14, 6:00 PM EDT	Special Weather Statement	CTP	Adams	30 min
May 14, 6:00 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	75 min
May 14, 6:09 PM EDT	Special Weather Statement	CTP	Franklin	36 min
May 14, 6:12 PM EDT	Special Weather Statement	CTP	Somerset	33 min
May 14, 6:24 PM EDT	Severe Thunderstorm Warning	CTP	Adams, York	51 min
May 14, 6:55 PM EDT	Special Weather Statement	CTP	Adams	35 min
May 14, 7:16 PM EDT	Special Weather Statement	CTP	York	29 min
May 14, 7:26 PM EDT	Areal Flood Advisory	CTP	Lancaster	2 hr
May 14, 7:42 PM EDT	Special Weather Statement	CTP	Blair	33 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2010 Every severe thunderstorm warning in 2010

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.