Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 270, NWS State College, PA

September 13, 2021Lycoming County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Sep 13, 2021, 6:43 PM EDT for Lycoming County, Pennsylvania. It was in force for 47 min. 1 report 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: Sep 13, 2021, 6:43 PM EDT (22:43 UTC)
Expired: Sep 13, 2021, 7:30 PM EDT
In force: 47 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Lycoming County, PA

The radar

The State College radar (KCCX), 98 km from the middle of the area, began a volume at 22:44 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
Sep 13, 7:10 PM EDT	TSTM WND DMG	1 Nne Loyalsockville, PA	TREES AND WIRES DOWN ALONG WALLIS RUN ROAD.

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Sep 13, 5:53 PM EDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.7 hours before the alert went out and 213 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: 1305 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

418 
WUUS51 KCTP 132243
SVRCTP
PAC081-132330-
/O.NEW.KCTP.SV.W.0270.210913T2243Z-210913T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
643 PM EDT Mon Sep 13 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northwestern Lycoming County in north central Pennsylvania...

* Until 730 PM EDT.

* At 642 PM EDT, a severe thunderstorm was located near English
  Center, moving southeast at 35 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...
  Williamsport, Montoursville, Cogan Station, Ralston, Slate Run,
  English Center, Trout Run, Barbours, Buttonwood, Loyalsockville,
  South Williamsport, Garden View, Little League World Series Complex
  and Ski Sawmill Ski Area.

This includes Interstate 180 near mile marker 22...and from mile
markers 24 to 28.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4147 7677 4142 7676 4121 7698 4146 7753
      4155 7739 4155 7720
TIME...MOT...LOC 2242Z 292DEG 31KT 4148 7734 

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

$$

Banghoff

1 follow-up statement

973 
WWUS51 KCTP 132326
SVSCTP

Severe Weather Statement
National Weather Service State College PA
726 PM EDT Mon Sep 13 2021

PAC081-132330-
/O.EXP.KCTP.SV.W.0270.000000T0000Z-210913T2330Z/
Lycoming PA-
726 PM EDT Mon Sep 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LYCOMING COUNTY
WILL EXPIRE AT 730 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

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

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

LAT...LON 4147 7677 4142 7676 4121 7698 4146 7753
      4155 7739 4155 7720
TIME...MOT...LOC 2320Z 292DEG 31KT 4136 7694 

$$

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, 6:21 PM EDT	Special Weather Statement	CTP	Elk	24 min
Sep 13, 6:36 PM EDT	Special Weather Statement	CTP	Lycoming	24 min
Sep 13, 7:18 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan	57 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.