Alert archive / Pennsylvania / Special Weather Statements in 2020

Special Weather Statement, NWS State College, PA

April 21, 2020Cameron County, Elk County, Pennsylvania

NWS State College, PA issued this special weather statement at Apr 21, 2020, 9:21 PM EDT for Cameron County, Elk County, Pennsylvania. It was in force for 54 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: Apr 21, 2020, 9:21 PM EDT (01:21 UTC)
Expired: Apr 21, 2020, 10:15 PM EDT
In force: 54 min
Issued by: NWS State College, PA

Counties Cameron County, PA, Elk County, PA

The radar

The State College radar (KCCX), 76 km from the middle of the area, began a volume at 01:20 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

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 1.4 hours before the alert went out and 156 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: 1162 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

319 
WWUS81 KCTP 220121
SPSCTP

Special Weather Statement
National Weather Service State College PA
921 PM EDT Tue Apr 21 2020
 
PAZ006-010>012-041-220215-
Potter PA-Northern Clinton PA-Cameron PA-Northern Lycoming PA-Elk PA-
921 PM EDT Tue Apr 21 2020

...A BAND OF HEAVY SNOW WILL AFFECT PARTS OF POTTER...NORTHERN
CLINTON...CAMERON...NORTHERN LYCOMING...AND ELK COUNTIES...

HAZARDS...A band of heavy snow accompanied by winds of up to 30 MPH
which can rapidly reduce visibility to less than a quarter of a mile.

LOCATION AND MOVEMENT...At 919 PM EDT, a band of heavy snow was over
Wilcox moving east at 45 MPH.

THIS BAND OF HEAVY SNOW WILL BE NEAR...
  St. Marys around 930 PM EDT.
  Elk River around 935 PM EDT.
  Truman around 940 PM EDT.
  Emporium and Sizerville around 945 PM EDT.
  Cameron around 950 PM EDT.
  Wharton around 955 PM EDT.

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

Conditions can deteriorate rapidly in winter weather situations. Be
prepared for snow or ice covered roads. Slow down and allow extra
time to reach your destination.

&&

LAT...LON 4162 7848 4160 7848 4160 7842 4161 7841
      4154 7748 4127 7753 4141 7885 4163 7878
      4163 7864
TIME...MOT...LOC 0119Z 278DEG 49KT 4154 7869 
$$

Martin

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 10:20 PM EDT	Special Weather Statement	CTP	Clinton	55 min

Nearby

Special Weather Statements in Pennsylvania, 2020 Every special weather statement 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.