Alert archive / Pennsylvania / Frost Advisories in 2008

Frost Advisory 2, NWS Pittsburgh, PA

May 28, 200810 counties in Pennsylvania; Columbiana County, Ohio; Hancock County, West Virginia

NWS Pittsburgh, PA issued this frost advisory at May 28, 2008, 5:21 PM EDT for 10 counties in Pennsylvania; Columbiana County, Ohio; Hancock County, West Virginia. It took effect at May 29, 2008, 2:00 AM EDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: May 28, 2008, 5:21 PM EDT (21:21 UTC)
In effect from: May 29, 2008, 2:00 AM EDT
Expired: May 29, 2008, 6:36 AM EDT
In force: 5 hr
Issued by: NWS Pittsburgh, PA

Counties Columbiana County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Forest County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Hancock County, WV

The radar

The Pittsburgh radar (KPBZ), 55 km from the middle of the area, began a volume at 21:23 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 (KPIT), launched 12:00Z, 9.4 hours before the alert went out and 65 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: 1517 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: -97 m²/s²
0-3 km storm-relative helicity: -10 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 27, 7:26 PM EDT, 21 hours 55 minutes earlier.

Area forecast discussion, May 27, 7:26 PM EDT, 21 hours 55 minutes before

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Nearby

Frost Advisories in Pennsylvania, 2008 Frost Advisories in Ohio, 2008 Frost Advisories in West Virginia, 2008 Every frost advisory in 2008

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.