Alert archive / Pennsylvania / Frost Advisories in 2014

Frost Advisory 1, NWS Pittsburgh, PA

May 17, 201414 counties in Pennsylvania; 11 counties in Ohio; 6 counties in West Virginia

NWS Pittsburgh, PA issued this frost advisory at May 17, 2014, 2:35 PM EDT for 14 counties in Pennsylvania; 11 counties in Ohio; 6 counties in West Virginia. It took effect at May 18, 2014, 4:00 AM EDT. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: May 17, 2014, 2:35 PM EDT (18:35 UTC)
In effect from: May 18, 2014, 4:00 AM EDT
Expired: May 18, 2014, 7:27 AM EDT
In force: 3 hr
Issued by: NWS Pittsburgh, PA

All 31 counties

Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Monroe County, OH, Muskingum County, OH, Noble County, OH, Tuscarawas County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Fayette County, PA, Forest County, PA, Greene County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Ohio County, WV, Wetzel County, WV

The nearest sounding before it

Pittsburgh, PA (KAGC), launched 12:00Z, 6.6 hours before the alert went out and 32 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: -20 J/kg
Mixed-layer LCL: 463 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 55 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 frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pittsburgh, PA wrote its last area forecast discussion before this frost advisory went out at May 16, 7:47 PM EDT, 18 hours 48 minutes earlier.

Area forecast discussion, May 16, 7:47 PM EDT, 18 hours 48 minutes before

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Nearby

Frost Advisories in Pennsylvania, 2014 Frost Advisories in Ohio, 2014 Frost Advisories in West Virginia, 2014 Every frost advisory in 2014

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.