Alert archive / Ohio / Frost Advisories in 2017

Frost Advisory 4, NWS Pittsburgh, PA

October 16, 20176 counties in Pennsylvania; 11 counties in Ohio; 7 counties in West Virginia

NWS Pittsburgh, PA issued this frost advisory at Oct 16, 2017, 11:21 AM EDT for 6 counties in Pennsylvania; 11 counties in Ohio; 7 counties in West Virginia. It took effect at Oct 17, 2017, 12:00 AM EDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Oct 16, 2017, 11:21 AM EDT (15:21 UTC)
In effect from: Oct 17, 2017, 12:00 AM EDT
Expired: Oct 17, 2017, 10:00 AM EDT
In force: 10 hr
Issued by: NWS Pittsburgh, PA

All 24 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, Beaver County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Wetzel County, WV

The radar

The Pittsburgh radar (KPBZ), 62 km from the middle of the area, began a volume at 15:23 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, 3.4 hours before the alert went out and 61 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: 602 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: -145 m²/s²
0-3 km storm-relative helicity: -58 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 Oct 15, 6:31 PM EDT, 16 hours 50 minutes earlier.

Area forecast discussion, Oct 15, 6:31 PM EDT, 16 hours 50 minutes before

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Hazardous weather outlook, Oct 15, 7:18 PM EDT, 16 hours 3 minutes before

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Nearby

Frost Advisories in Ohio, 2017 Frost Advisories in West Virginia, 2017 Frost Advisories in Pennsylvania, 2017 Every frost advisory in 2017

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.