Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS State College, PA

August 18, 2011Lancaster County, Pennsylvania

NWS State College, PA issued this special weather statement at Aug 18, 2011, 5:11 PM EDT for Lancaster County, Pennsylvania. It was in force for 49 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: Aug 18, 2011, 5:11 PM EDT (21:11 UTC)
Expired: Aug 18, 2011, 6:00 PM EDT
In force: 49 min
Issued by: NWS State College, PA

County Lancaster County, PA

The radar

The Dover AFB radar (KDOX), 143 km from the middle of the area, began a volume at 21:11 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.2 hours before the alert went out and 56 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: 780 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Aug 18, 4:28 PM EDT, 43 minutes earlier.

Area forecast discussion, Aug 18, 4:28 PM EDT, 43 minutes before

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Hazardous weather outlook, Aug 18, 4:35 AM EDT, 12 hours 36 minutes before

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In the hours before

Special weather statement, Aug 18, 3:43 PM EDT, 1 hour 28 minutes before

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Special weather statement, Aug 18, 5:11 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
Aug 18, 3:04 AM EDT	Special Weather Statement	CTP	Lebanon, Schuylkill	71 min
Aug 18, 3:52 AM EDT	Special Weather Statement	CTP	Lancaster	53 min
Aug 18, 3:43 PM EDT	Special Weather Statement	CTP	Adams	77 min
Aug 18, 6:24 PM EDT	Special Weather Statement	CTP	Lancaster	21 min
Aug 18, 6:56 PM EDT	Special Weather Statement	CTP	Lancaster	19 min
Aug 18, 7:18 PM EDT	Special Weather Statement	CTP	York	57 min
Aug 18, 7:38 PM EDT	Special Weather Statement	CTP	Lebanon	37 min

Nearby

Special Weather Statements in Pennsylvania, 2011 Every special weather statement in 2011

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.