Alert archive / Pennsylvania / Heat Advisories in 2007

Heat Advisory 3, NWS State College, PA

August 7, 200716 counties in Pennsylvania

NWS State College, PA issued this heat advisory at Aug 7, 2007, 2:52 PM EDT for 16 counties in Pennsylvania. It took effect at Aug 8, 2007, 1:00 PM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Aug 7, 2007, 2:52 PM EDT (18:52 UTC)
In effect from: Aug 8, 2007, 1:00 PM EDT
Expired: Aug 8, 2007, 7:00 PM EDT
In force: 6 hr
Issued by: NWS State College, PA

Counties Adams County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Lancaster County, PA, Lebanon County, PA, Lycoming County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Schuylkill County, PA, Snyder County, PA, Union County, PA, York County, PA

The radar

The State College radar (KCCX), 102 km from the middle of the area, began a volume at 18:53 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 12:00Z, 6.9 hours before the alert went out and 268 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: 817 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 613 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: -23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this heat advisory 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 heat advisory went out at Aug 7, 2:27 PM EDT, 25 minutes earlier.

Area forecast discussion, Aug 7, 2:27 PM EDT, 25 minutes before

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Hazardous weather outlook, Aug 7, 5:24 AM EDT, 9 hours 28 minutes before

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In the hours before

Special weather statement, Aug 7, 12:06 PM EDT, 2 hours 46 minutes before

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Special weather statement, Aug 7, 12:40 PM EDT, 2 hours 12 minutes before

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Special weather statement, Aug 7, 1:28 PM EDT, 1 hour 24 minutes before

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Nearby

Heat Advisories in Pennsylvania, 2007 Every heat advisory in 2007

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.