Alert archive / Pennsylvania / Heat Advisories in 2011

Heat Advisory 6, NWS State College, PA

July 28, 20118 counties in Pennsylvania

NWS State College, PA issued this heat advisory at Jul 28, 2011, 1:23 PM EDT for 8 counties in Pennsylvania. It took effect at Jul 29, 2011, 12:00 PM EDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jul 28, 2011, 1:23 PM EDT (17:23 UTC)
In effect from: Jul 29, 2011, 12:00 PM EDT
Expired: Jul 29, 2011, 8:00 PM EDT
In force: 8 hr
Issued by: NWS State College, PA

Counties Adams County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Lancaster County, PA, Lebanon County, PA, Perry County, PA, York County, PA

The radar

The State College radar (KCCX), 124 km from the middle of the area, began a volume at 17:24 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, 5.4 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: 62 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 1137 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 231 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

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 Jul 28, 10:44 AM EDT, 2 hours 39 minutes earlier.

Area forecast discussion, Jul 28, 10:44 AM EDT, 2 hours 39 minutes before

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Hazardous weather outlook, Jul 28, 4:54 AM EDT, 8 hours 29 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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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 28, 4:59 PM EDT	Special Weather Statement	CTP	Bedford	61 min
Jul 28, 5:59 PM EDT	Areal Flood Advisory	CTP	Cambria, Somerset	6 hr
Jul 28, 7:24 PM EDT	Special Weather Statement	CTP	Somerset	36 min
Jul 28, 7:33 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Cambria, Somerset	57 min

Nearby

Heat Advisories in Pennsylvania, 2011 Every heat advisory 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.