Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS State College, PA

March 1, 2021Somerset County, Pennsylvania

NWS State College, PA issued this special weather statement at Mar 1, 2021, 7:02 PM EST for Somerset County, Pennsylvania. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Mar 1, 2021, 7:02 PM EST (00:02 UTC)
Expired
Mar 1, 2021, 7:30 PM EST
In force
28 min
Issued by
NWS State College, PA

County Somerset County, PA

The radar

The Pittsburgh radar (KPBZ), 113 km from the middle of the area, began a volume at 00:02 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 00:00Z, 0.0 hours before the alert went out and 97 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 00:00Z on 2021-03-02Temperature 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 00:00Z on 2021-03-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.1939587897117136156175Sfc1 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
970 m above ground
0-6 km bulk shear
93 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

372 
WWUS81 KCTP 020002
SPSCTP

Special Weather Statement
National Weather Service State College PA
702 PM EST Mon Mar 1 2021
 
PAZ033-020030-
Somerset PA-
702 PM EST Mon Mar 1 2021

...A SNOW SQUALL WILL AFFECT PARTS OF SOMERSET COUNTY...

HAZARDS...A snow squall which can rapidly reduce visibility to a 
quarter of a mile.

LOCATION AND MOVEMENT...At 700 PM EST, a line of snow squalls were 
entering Somerset County, moving east at 50 MPH. The squalls should 
move east of the region by around 730 PM.

This includes The Pennsylvania Turnpike from mile markers 100 to 130.

SAFETY INFO...
Use extra caution if you must travel into or through this squall.
Rapid changes in visibility and potentially slick roads are likely to
lead to accidents. Consider delaying travel until this squall passes
your location.

&&

LAT...LON 3972 7938 3973 7941 3977 7938 3978 7939
      3978 7935 3982 7937 3985 7942 3987 7941
      4009 7925 4012 7921 4012 7917 4016 7916
      4025 7908 4011 7872 4006 7876 3983 7875
      3977 7878 3972 7881
TIME...MOT...LOC 0000Z 291DEG 45KT 4004 7907 
$$

KF

Nearby

Special Weather Statements in Pennsylvania, 2021Every special weather statement in 2021

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.