Alert archive / Pennsylvania / Frost Advisories in 2020
Frost Advisory 5, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this frost advisory at Sep 18, 2020, 9:12 AM EDT for 5 counties in Pennsylvania; Tucker County, West Virginia. It took effect at Sep 19, 2020, 1:00 AM EDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Sep 18, 2020, 9:12 AM EDT (13:12 UTC)
- In effect from
- Sep 19, 2020, 1:00 AM EDT
- Expired
- Sep 19, 2020, 9:00 AM EDT
- In force
- 8 hr
- Issued by
- NWS Pittsburgh, PA
Counties Clarion County, PA, Forest County, PA, Jefferson County, PA, Mercer County, PA, Venango County, PA, Tucker County, WV
The radar
The Pittsburgh radar (KPBZ), 73 km from the middle of the area, began a volume at 13:18 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, 1.2 hours before the alert went out and 76 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.
- Mixed-layer CAPE
- 1 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 625 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -32 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
Nearby
Frost Advisories in Pennsylvania, 2020Frost Advisories in West Virginia, 2020Every frost advisory in 2020
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.