Alert archive / Pennsylvania / Heat Advisories in 2018

Heat Advisory 2, NWS State College, PA

June 29, 201825 counties in Pennsylvania

NWS State College, PA issued this heat advisory at Jun 29, 2018, 2:28 PM EDT for 25 counties in Pennsylvania. It took effect at Jul 1, 2018, 8:00 AM EDT. It was in force for 60 hr.

The area

The counties it named.

The facts

Issued: Jun 29, 2018, 2:28 PM EDT (18:28 UTC)
In effect from: Jul 1, 2018, 8:00 AM EDT
Expired: Jul 3, 2018, 8:00 PM EDT
In force: 60 hr
Issued by: NWS State College, PA

All 25 counties

Adams County, PA, Bedford County, PA, Blair County, PA, Centre County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Lycoming County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Schuylkill County, PA, Snyder County, PA, Sullivan County, PA, Tioga County, PA, Union County, PA, York County, PA

The radar

The State College radar (KCCX), 76 km from the middle of the area, began a volume at 18:25 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 (KAGC), launched 12:00Z, 6.5 hours before the alert went out and 246 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: 1228 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 44 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 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 Jun 28, 7:39 PM EDT, 18 hours 49 minutes earlier.

Area forecast discussion, Jun 28, 7:39 PM EDT, 18 hours 49 minutes before

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Nearby

Heat Advisories in Pennsylvania, 2018 Every heat advisory in 2018

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.