Alert archive / Pennsylvania / Areal Flood Warnings in 2012

Areal Flood Warning 3, NWS State College, PA

October 30, 20127 counties in Pennsylvania

NWS State College, PA issued this areal flood warning at Oct 30, 2012, 4:12 AM EDT for 7 counties in Pennsylvania. It was in force for 5 hr. 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 30, 2012, 4:12 AM EDT (08:12 UTC)
Expired: Oct 30, 2012, 9:00 AM EDT
In force: 5 hr
Issued by: NWS State College, PA
Area: Storm-based polygon
Flood severity: None

Counties Bedford County, PA, Cumberland County, PA, Franklin County, PA, Fulton County, PA, Juniata County, PA, Perry County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 88 km from the middle of the area, began a volume at 08:14 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, 8.2 hours before the alert went out and 138 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: 569 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 504 m²/s²
0-3 km storm-relative helicity: 1823 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 areal flood 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 areal flood warning went out at Oct 29, 6:15 PM EDT, 9 hours 57 minutes earlier.

Area forecast discussion, Oct 29, 6:15 PM EDT, 9 hours 57 minutes before

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Hazardous weather outlook, Oct 29, 5:45 PM EDT, 10 hours 27 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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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 29, 8:36 PM EDT	Areal Flood Advisory	CTP	Cameron, Centre, Clearfield, Clinton, Columbia, Elk and 6 more	8 hr
Oct 30, 4:18 AM EDT	Wind Advisory	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more	6 hr
Oct 30, 1:03 PM EDT	Areal Flood Advisory	CTP	Adams, Bedford, Blair, Cambria, Cameron, Centre and 23 more	4 hr

Nearby

Areal Flood Warnings in Pennsylvania, 2012 Every areal flood warning in 2012

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.