Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS State College, PA

September 13, 2021Elk County, Pennsylvania

NWS State College, PA issued this special weather statement at Sep 13, 2021, 6:21 PM EDT for Elk County, Pennsylvania. It was in force for 24 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: Sep 13, 2021, 6:21 PM EDT (22:21 UTC)
Expired: Sep 13, 2021, 6:45 PM EDT
In force: 24 min
Issued by: NWS State College, PA
Hail: 0.75 in
Wind: 50

County Elk County, PA

The radar

The State College radar (KCCX), 95 km from the middle of the area, began a volume at 22:21 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, 10.4 hours before the alert went out and 145 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: 610 J/kg
Mixed-layer CIN: -292 J/kg
Mixed-layer LCL: 748 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

682 
WWUS81 KCTP 132221
SPSCTP

Special Weather Statement
National Weather Service State College PA
621 PM EDT Mon Sep 13 2021
 
PAZ010-132245-
Elk PA-
621 PM EDT Mon Sep 13 2021

...A strong thunderstorm will impact portions of southwestern Elk
County through 645 PM EDT...

At 621 PM EDT, Doppler radar was tracking a strong thunderstorm over
Marienville, moving east at 40 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
Ridgway, Johnsonburg, Brandy Camp, Portland Mills and Brockport. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in State College PA.

A Severe Thunderstorm Watch remains in effect until 100 AM EDT for
north central Pennsylvania.

&&

LAT...LON 4142 7909 4143 7906 4145 7906 4145 7898
      4144 7896 4153 7896 4149 7860 4123 7872
      4123 7874 4126 7874 4137 7897 4135 7902
      4136 7904 4134 7910 4141 7910
TIME...MOT...LOC 2221Z 285DEG 33KT 4144 7909 

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

$$

Banghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 13, 12:24 AM EDT	Special Weather Statement	CTP	McKean	36 min
Sep 13, 12:53 AM EDT	Special Weather Statement	CTP	McKean, Potter, Tioga	52 min
Sep 13, 5:15 PM EDT	Special Weather Statement	CTP	Warren	30 min
Sep 13, 5:45 PM EDT	Special Weather Statement	CTP	Potter	30 min
Sep 13, 6:14 PM EDT	Special Weather Statement	CTP	Potter	31 min
Sep 13, 6:36 PM EDT	Special Weather Statement	CTP	Lycoming	24 min
Sep 13, 6:43 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	47 min
Sep 13, 7:18 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan	57 min

Nearby

Special Weather Statements in Pennsylvania, 2021 Every 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.