Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 210, NWS State College, PA

August 12, 2021Clinton County, Lycoming County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 12, 2021, 1:47 PM EDT for Clinton County, Lycoming County, Pennsylvania. It was in force for 58 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: Aug 12, 2021, 1:47 PM EDT (17:47 UTC)
Expired: Aug 12, 2021, 2:45 PM EDT
In force: 58 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Clinton County, PA, Lycoming County, PA

The radar

The State College radar (KCCX), 77 km from the middle of the area, began a volume at 17:47 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 12, 1:11 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 5.8 hours before the alert went out and 223 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: 390 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

036 
WUUS51 KCTP 121747
SVRCTP
PAC035-081-121845-
/O.NEW.KCTP.SV.W.0210.210812T1747Z-210812T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
147 PM EDT Thu Aug 12 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Southwestern Lycoming County in north central Pennsylvania...
  Central Clinton County in north central Pennsylvania...

* Until 245 PM EDT.

* At 146 PM EDT, a severe thunderstorm was located near Waterville,
  moving east at 30 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Williamsport, Jersey Shore, Avis, Duboistown, Glen Union,
  Waterville, Cogan Station, Collomsville, Little Pine State Park,
  South Williamsport, Garden View, Oval and Salladasburg.

This includes Interstate 180 from mile markers 27 to 29.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4132 7696 4114 7706 4113 7708 4112 7715
      4125 7770 4139 7751 4140 7721
TIME...MOT...LOC 1746Z 283DEG 26KT 4128 7743 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Colbert

1 follow-up statement

868 
WWUS51 KCTP 121818
SVSCTP

Severe Weather Statement
National Weather Service State College PA
218 PM EDT Thu Aug 12 2021

PAC035-121827-
/O.CAN.KCTP.SV.W.0210.000000T0000Z-210812T1845Z/
Clinton PA-
218 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CLINTON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
north central Pennsylvania.

LAT...LON 4132 7696 4114 7706 4113 7710 4112 7717
      4114 7724 4122 7732 4122 7735 4123 7735
      4124 7738 4132 7733 4133 7697
TIME...MOT...LOC 1817Z 283DEG 26KT 4123 7714 

$$

PAC081-121845-
/O.CON.KCTP.SV.W.0210.000000T0000Z-210812T1845Z/
Lycoming PA-
218 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR SOUTHWESTERN LYCOMING COUNTY...

At 217 PM EDT, a severe thunderstorm was located near Duboistown,
moving east at 30 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Williamsport, Jersey Shore, Duboistown, Collomsville, Cogan Station,
South Williamsport, Garden View, Oval and Salladasburg.

This includes Interstate 180 from mile markers 27 to 29.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4132 7696 4114 7706 4113 7710 4112 7717
      4114 7724 4122 7732 4122 7735 4123 7735
      4124 7738 4132 7733 4133 7697
TIME...MOT...LOC 1817Z 283DEG 26KT 4123 7714 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Banghoff

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 3:33 AM EDT	Excessive Heat Warning	CTP	Adams, Dauphin, Lancaster, Lebanon, York	39 hr
Aug 12, 3:33 AM EDT	Heat Advisory	CTP	Columbia, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 8 more	39 hr
Aug 12, 12:38 PM EDT	Special Weather Statement	CTP	Tioga	52 min
Aug 12, 12:51 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter, Tioga	54 min
Aug 12, 1:27 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan	63 min
Aug 12, 1:43 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	49 min
Aug 12, 2:15 PM EDT	Special Weather Statement	CTP	Columbia	30 min
Aug 12, 2:25 PM EDT	Special Weather Statement	CTP	Lycoming	20 min
Aug 12, 2:50 PM EDT	Special Weather Statement	CTP	Columbia, Montour	25 min
Aug 12, 3:19 PM EDT	Special Weather Statement	CTP	Schuylkill	41 min
Aug 12, 5:12 PM EDT	Severe Thunderstorm Warning	CTP	Warren	48 min
Aug 12, 5:27 PM EDT	Special Weather Statement	CTP	Tioga	33 min
Aug 12, 5:46 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield, Elk	44 min
Aug 12, 6:25 PM EDT	Areal Flood Advisory	CTP	Clearfield, Elk	2 hr
Aug 12, 6:25 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	65 min
Aug 12, 7:07 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield, Elk	53 min
Aug 12, 7:33 PM EDT	Special Weather Statement	CTP	Blair, Cambria	27 min
Aug 12, 7:47 PM EDT	Special Weather Statement	CTP	Centre	28 min
Aug 12, 7:56 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	49 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.