Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 212, NWS State College, PA

July 22, 2019Lancaster County, York County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 22, 2019, 10:06 PM EDT for Lancaster County, York 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 counties it named.

The facts

Issued: Jul 22, 2019, 10:06 PM EDT (02:06 UTC)
Expired: Jul 22, 2019, 10:33 PM EDT
In force: 27 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Lancaster County, PA, York County, PA

The radar

The Sterling radar (KLWX), 141 km from the middle of the area, began a volume at 02:09 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 2.1 hours before the alert went out and 139 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: 815 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1256 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.3

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 Jul 22, 8:10 PM EDT, 1 hour 56 minutes earlier.

Area forecast discussion, Jul 22, 8:10 PM EDT, 1 hour 56 minutes before

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Hazardous weather outlook, Jul 22, 8:36 PM EDT, 1 hour 30 minutes before

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In the hours before

Local storm report, Jul 22, 4:21 PM EDT, 5 hours 45 minutes before

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Local storm report, Jul 22, 4:57 PM EDT, 5 hours 9 minutes before

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Local storm report, Jul 22, 5:16 PM EDT, 4 hours 50 minutes before

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Special weather statement, Jul 22, 6:40 PM EDT, 3 hours 26 minutes before

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Special weather statement, Jul 22, 9:46 PM EDT, 20 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
Jul 22, 9:46 PM EDT	Special Weather Statement	CTP	York	44 min
Jul 22, 11:17 PM EDT	Areal Flood Advisory	CTP	Lancaster, York	118 min
Jul 23, 1:22 AM EDT	Areal Flood Advisory	CTP	Adams, Lancaster, York	3 hr
Jul 23, 4:07 PM EDT	Special Weather Statement	CTP	Clearfield	23 min
Jul 23, 4:21 PM EDT	Special Weather Statement	CTP	Cameron	24 min
Jul 23, 4:33 PM EDT	Special Weather Statement	CTP	Blair	27 min

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.