Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 39, NWS State College, PA

June 14, 2021Clinton County, Lycoming County, Union County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 14, 2021, 2:33 PM EDT for Clinton County, Lycoming County, Union County, Pennsylvania. It was in force for 57 min. 3 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
Jun 14, 2021, 2:33 PM EDT (18:33 UTC)
Expired
Jun 14, 2021, 3:30 PM EDT
In force
57 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Clinton County, PA, Lycoming County, PA, Union County, PA

The radar

The State College radar (KCCX), 82 km from the middle of the area, began a volume at 18:35 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

TimeReportWhereRemark
Jun 14, 2:35 PM EDTTSTM WND DMG1 Ene Mcelhattan, PASEVERAL REPORTS OF TREES DOWN BETWEEN LOCK HAVEN AND AVIS.
Jun 14, 2:36 PM EDTTSTM WND DMG2 S Avis, PATREE DOWN BLOCKING BOTH LANES OF PINE-LOGANTON ROAD IN WAYNE TOWSNHIP.
Jun 14, 2:53 PM EDTTSTM WND DMG1 E Collomsville, PASPORADIC TREES DOWN ACROSS NIPPENOSE VALLEY.

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.

IssuedProductOfficeLasted
Jun 14, 11:46 AM EDTSevere Thunderstorm WatchSPC6 hr
Jun 14, 2:06 PM EDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 6.6 hours before the alert went out and 242 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2021-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2021-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1367 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

234 
WUUS51 KCTP 141833
SVRCTP
PAC035-081-119-141930-
/O.NEW.KCTP.SV.W.0039.210614T1833Z-210614T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
233 PM EDT Mon Jun 14 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Southwestern Lycoming County in north central Pennsylvania...
  Northeastern Union County in central Pennsylvania...
  Eastern Clinton County in north central Pennsylvania...

* Until 330 PM EDT.

* At 233 PM EDT, severe thunderstorms were located along a line
  extending from near Cammal to near McElhattan to Mackeyville,
  moving east at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Williamsport, Lock Haven, Lewisburg, Montoursville, Jersey Shore,
  Carroll, Muncy, Mill Hall, Montgomery, Linntown, Avis, Dunnstown,
  Flemington, Duboistown, Castanea, New Columbia, McElhattan,
  Allenwood, Elimsport and Waterville.

For those driving on Interstate 80, this includes areas between the
Lamar and Milton-Williamsport exits, specifically from mile markers
177 to 210.

This includes Interstate 180 near mile marker 10...and from mile
markers 15 to 29.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4131 7683 4118 7678 4116 7687 4115 7689
      4110 7689 4107 7686 4098 7688 4095 7691
      4100 7719 4104 7715 4101 7727 4105 7752
      4120 7746 4138 7757
TIME...MOT...LOC 1833Z 282DEG 32KT 4135 7747 4119 7738 4107 7744 

HAIL...<.75IN
WIND...60MPH
 
$$

Colbert
1 follow-up statement
330 
WWUS51 KCTP 141903
SVSCTP

Severe Weather Statement
National Weather Service State College PA
303 PM EDT Mon Jun 14 2021

PAC035-141911-
/O.CAN.KCTP.SV.W.0039.000000T0000Z-210614T1930Z/
Clinton PA-
303 PM EDT Mon Jun 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CLINTON COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
north central Pennsylvania. A Severe Thunderstorm Watch also remains
in effect until 900 PM EDT for central and north central
Pennsylvania.

LAT...LON 4131 7683 4118 7678 4115 7689 4111 7689
      4107 7686 4098 7688 4095 7691 4100 7719
      4104 7714 4107 7714 4107 7716 4112 7722
      4130 7725 4135 7724
TIME...MOT...LOC 1901Z 282DEG 32KT 4130 7714 4114 7706 4102 7712 

$$

PAC081-119-141930-
/O.CON.KCTP.SV.W.0039.000000T0000Z-210614T1930Z/
Lycoming PA-Union PA-
303 PM EDT Mon Jun 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTH CENTRAL LYCOMING AND NORTHEASTERN UNION COUNTIES...

At 301 PM EDT, severe thunderstorms were located along a line
extending from near Cogan Station to Elimsport to near Sand Bridge
State Park, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Williamsport, Lewisburg, Montoursville, Muncy, Watsontown,
Montgomery, Linntown, Duboistown, New Columbia, Allenwood, Elimsport,
Cogan Station, Spruce Run Reservoir, Collomsville, Sand Bridge State
Park, Forest Hill, South Williamsport, Garden View, West Milton and
Oval.

For those driving on Interstate 80, this includes areas between the
Jersey Shore and Milton-Williamsport exits, specifically from mile
markers 195 to 210.

This includes Interstate 180 near mile marker 10...and from mile
markers 15 to 29.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4131 7683 4118 7678 4115 7689 4111 7689
      4107 7686 4098 7688 4095 7691 4100 7719
      4104 7714 4107 7714 4107 7716 4112 7722
      4130 7725 4135 7724
TIME...MOT...LOC 1901Z 282DEG 32KT 4130 7714 4114 7706 4102 7712 

HAIL...<.75IN
WIND...60MPH
 
$$

JCG

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 13, 8:10 PM EDTSevere Thunderstorm WarningCTPMcKean35 min
Jun 13, 8:15 PM EDTSpecial Weather StatementCTPCentre45 min
Jun 13, 8:30 PM EDTSpecial Weather StatementCTPHuntingdon30 min
Jun 13, 8:41 PM EDTSevere Thunderstorm WarningCTPMcKean, Potter64 min
Jun 13, 9:02 PM EDTSpecial Weather StatementCTPHuntingdon43 min
Jun 13, 9:08 PM EDTAreal Flood AdvisoryCTPMcKean67 min
Jun 13, 9:38 PM EDTAreal Flood AdvisoryCTPCentre82 min
Jun 13, 9:47 PM EDTAreal Flood AdvisoryCTPPotter73 min
Jun 13, 10:58 PM EDTAreal Flood AdvisoryCTPCentre2 hr
Jun 13, 11:04 PM EDTAreal Flood AdvisoryCTPHuntingdon, Mifflin116 min
Jun 13, 11:04 PM EDTSpecial Weather StatementCTPJuniata56 min
Jun 13, 11:56 PM EDTSpecial Weather StatementCTPPerry34 min
Jun 14, 12:29 AM EDTSpecial Weather StatementCTPCumberland31 min
Jun 14, 12:37 AM EDTSevere Thunderstorm WarningCTPCumberland, Perry38 min
Jun 14, 1:12 AM EDTSevere Thunderstorm WarningCTPCumberland, York48 min
Jun 14, 11:36 AM EDTSpecial Weather StatementCTPWarren39 min
Jun 14, 12:02 PM EDTSpecial Weather StatementCTPElk58 min
Jun 14, 12:47 PM EDTSevere Thunderstorm WarningCTPCameron, Clearfield, Elk73 min
Jun 14, 1:31 PM EDTSevere Thunderstorm WarningCTPClinton74 min
Jun 14, 1:53 PM EDTSpecial Weather StatementCTPCentre37 min
Jun 14, 3:18 PM EDTSevere Thunderstorm WarningCTPColumbia, Lycoming, Montour, Northumberland, Union57 min
Jun 14, 4:04 PM EDTSevere Thunderstorm WarningCTPBlair, Cambria41 min
Jun 14, 4:10 PM EDTSpecial Weather StatementCTPCentre20 min
Jun 14, 4:10 PM EDTSevere Thunderstorm WarningCTPColumbia, Schuylkill50 min
Jun 14, 4:16 PM EDTSpecial Weather StatementCTPSomerset14 min
Jun 14, 4:24 PM EDTSpecial Weather StatementCTPBlair21 min
Jun 14, 4:43 PM EDTSpecial Weather StatementCTPBlair47 min
Jun 14, 4:44 PM EDTSpecial Weather StatementCTPSomerset16 min
Jun 14, 5:04 PM EDTSpecial Weather StatementCTPSomerset26 min
Jun 14, 5:49 PM EDTSpecial Weather StatementCTPSomerset26 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2021Every 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.