Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 283, NWS State College, PA

October 15, 2021Clearfield County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Oct 15, 2021, 12:17 PM EDT for Clearfield County, Pennsylvania. It was in force for 43 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Oct 15, 2021, 12:17 PM EDT (16:17 UTC)
Expired: Oct 15, 2021, 1:00 PM EDT
In force: 43 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Clearfield County, PA

The radar

The State College radar (KCCX), 52 km from the middle of the area, began a volume at 16:21 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.

What was reported inside it

Time	Report	Where	Remark
Oct 15, 12:52 PM EDT	TSTM WND DMG	3 Se Curwensville, PA	MULTIPLE TREES DOWN FROM GRAMPIAN TO GLEN RICHEY.
Oct 15, 12:58 PM EDT	TSTM WND DMG	1 Sw Curwensville, PA	TREE DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 4.3 hours before the alert went out and 142 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: 685 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 658 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

993 
WUUS51 KCTP 151617
SVRCTP
PAC033-151700-
/O.NEW.KCTP.SV.W.0283.211015T1617Z-211015T1700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
1217 PM EDT Fri Oct 15 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northwestern Clearfield County in central Pennsylvania...

* Until 100 PM EDT.

* At 1217 PM EDT, a severe thunderstorm was located 10 miles east of
  Punxsutawney, moving east at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Clearfield, Woodland, Curwensville, Hyde, Plymptonville, Rockton,
  S.B. Elliot State Park, Grampian, Wallaceton, Troutville, Lumber
  City and Clearfield-Lawrence Airport.

For those driving on Interstate 80, this includes areas between the
Dubois Route 255 and Kylertown exits, specifically from mile markers
110 to 125.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4102 7880 4119 7838 4094 7827 4089 7880
TIME...MOT...LOC 1617Z 250DEG 22KT 4095 7878 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Steinbugl

1 follow-up statement

520 
WWUS51 KCTP 151640
SVSCTP

Severe Weather Statement
National Weather Service State College PA
1240 PM EDT Fri Oct 15 2021

PAC033-151700-
/O.CON.KCTP.SV.W.0283.000000T0000Z-211015T1700Z/
Clearfield PA-
1240 PM EDT Fri Oct 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM EDT
FOR CENTRAL CLEARFIELD COUNTY...

At 1240 PM EDT, a severe thunderstorm was located near Curwensville,
moving east at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Clearfield, Woodland, Curwensville, Hyde, Plymptonville, Grampian,
Wallaceton, Lumber City and Clearfield-Lawrence Airport.

For those driving on Interstate 80, this includes areas between the
Penfield and Kylertown exits, specifically from mile markers 114 to
125.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4100 7868 4113 7836 4094 7827 4090 7866
TIME...MOT...LOC 1640Z 261DEG 22KT 4098 7860 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Steinbugl

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 15, 12:02 PM EDT	Special Weather Statement	CTP	Clearfield	28 min
Oct 15, 12:58 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	47 min
Oct 15, 1:45 PM EDT	Special Weather Statement	CTP	Centre	30 min
Oct 15, 3:33 PM EDT	Special Weather Statement	CTP	Warren	27 min
Oct 15, 4:09 PM EDT	Special Weather Statement	CTP	Warren	21 min
Oct 15, 4:12 PM EDT	Severe Thunderstorm Warning	CTP	Warren	32 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2021 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.