Alert archive / Pennsylvania / Snow Squall Warnings in 2025

Snow Squall Warning 9, NWS Pittsburgh, PA

January 3, 20254 counties in Pennsylvania

NWS Pittsburgh, PA issued this snow squall warning at Jan 3, 2025, 4:16 PM EST for 4 counties in Pennsylvania. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jan 3, 2025, 4:16 PM EST (21:16 UTC)
Expired
Jan 3, 2025, 5:15 PM EST
In force
59 min
Issued by
NWS Pittsburgh, PA
Area
Storm-based polygon

Counties Allegheny County, PA, Fayette County, PA, Washington County, PA, Westmoreland County, PA

The radar

The Pittsburgh radar (KPBZ), 47 km from the middle of the area, began a volume at 21:16 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, 9.3 hours before the alert went out and 31 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-pSkew-T log-p diagram, Pittsburgh, PA at 12:00Z on 2025-01-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 12:00Z on 2025-01-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
510 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 3, 12:46 PM ESTSnow Squall WarningPBZLawrence, Mercer44 min
Jan 3, 1:21 PM ESTSnow Squall WarningPBZBeaver, Butler, Clarion, Lawrence, Mercer, Venango39 min
Jan 3, 1:56 PM ESTSnow Squall WarningPBZAllegheny, Armstrong, Beaver, Butler, Clarion, Lawrence and 2 more49 min
Jan 3, 2:33 PM ESTSnow Squall WarningPBZAllegheny, Armstrong, Beaver, Butler, Clarion, Indiana and 2 more42 min
Jan 3, 2:37 PM ESTSnow Squall WarningPBZAllegheny, Beaver, Butler, Lawrence, Mercer, Washington53 min
Jan 3, 3:14 PM ESTSnow Squall WarningPBZAllegheny, Armstrong, Butler, Clarion, Indiana, Jefferson and 1 more46 min
Jan 3, 3:25 PM ESTSnow Squall WarningPBZAllegheny, Beaver, Fayette, Greene, Washington, Westmoreland50 min
Jan 3, 3:59 PM ESTSnow Squall WarningPBZAllegheny, Armstrong, Beaver, Butler, Indiana, Lawrence and 1 more61 min
Jan 3, 4:47 PM ESTWinter Storm WatchPBZFayette, Greene, Washington, Westmoreland34 hr
Jan 3, 5:00 PM ESTSnow Squall WarningPBZAllegheny, Armstrong, Beaver, Butler, Indiana, Lawrence and 1 more60 min
Jan 3, 6:03 PM ESTSnow Squall WarningPBZAllegheny, Armstrong, Butler, Indiana, Westmoreland29 min

Nearby

Snow Squall Warnings in Pennsylvania, 2025Every snow squall warning in 2025

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.