Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 88, NWS State College, PA

July 7, 20214 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 7, 2021, 6:36 PM EDT for 4 counties in Pennsylvania. It was in force for 39 min. 7 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
Jul 7, 2021, 6:36 PM EDT (22:36 UTC)
Expired
Jul 7, 2021, 7:15 PM EDT
In force
39 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

Counties Centre County, PA, Clearfield County, PA, Clinton County, PA, Mifflin County, PA

The radar

The State College radar (KCCX), 24 km from the middle of the area, began a volume at 22:38 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
Jul 7, 6:55 PM EDTTSTM WND DMG2 Nnw Pleasant Gap, PALARGE TREE ACROSS BLANCHARD STREET BLOCKING TRAFFIC.
Jul 7, 6:55 PM EDTTSTM WND DMG2 Nnw Pleasant Gap, PA
Jul 7, 6:55 PM EDTTSTM WND DMGPleasant Gap, PANUMEROUS TREES AND WIRES DOWN IN PLEASANT GAP.
Jul 7, 6:55 PM EDTTSTM WND DMGPleasant Gap, PA
Jul 7, 6:58 PM EDTTSTM WND DMG2 W Bellefonte, PANUMEROUS TREES DOWN ALONG AND ACROSS COLEVILLE ROAD.
Jul 7, 6:58 PM EDTTSTM WND DMG2 W Bellefonte, PA
Jul 7, 6:59 PM EDTTSTM WND DMG1 E Boalsburg, PAREPORT FROM MPING: 1-INCH TREE LIMBS BROKEN; SHINGLES BLOWN OFF.

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
Jul 7, 3:31 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 10.6 hours before the alert went out and 208 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, Pittsburgh, PA at 12:00Z on 2021-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 505 joules per kilogram.LCLLFCEL10008507005003002001001 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, Pittsburgh, PA at 12:00Z on 2021-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.1939Sfc1 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
505 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
1230 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

776 
WUUS51 KCTP 072236
SVRCTP
PAC027-033-035-087-072315-
/O.NEW.KCTP.SV.W.0088.210707T2236Z-210707T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
636 PM EDT Wed Jul 7 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Northeastern Clearfield County in central Pennsylvania...
  Northeastern Mifflin County in central Pennsylvania...
  Centre County in central Pennsylvania...
  Southern Clinton County in north central Pennsylvania...

* Until 715 PM EDT.

* At 636 PM EDT, severe thunderstorms were located along a line
  extending from near Lecontes Mills to near Pine Glen to near
  Moshannon to Julian to Boalsburg to near Seven Mountains, moving
  east at 40 mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Severe thunderstorms will be near...
  State College, Seven Mountains, Boalsburg, Snow Shoe, Clarence, 
  Lemont, Houserville and Reedsville around 640 PM EDT.
  Bellefonte, Centre Hall, Potters Mills, Milesburg, Pleasant Gap, 
  Milroy and Reeds Gap State Park around 650 PM EDT.
  Spring Mills, Zion, Monument, Poe Valley State Park, Bald Eagle 
  State Park and Belltown around 700 PM EDT.
  Lock Haven, Lamar, Millheim, Aaronsburg, Coburn, Blanchard, 
  Madisonburg, Woodward, Rebersburg and Mackeyville around 710 PM 
  EDT.

Other locations impacted by these severe thunderstorms include
Barrville, Orviston, McCall Dam State Park, Beech Creek, Kylertown,
Grassflat, Siglerville, Howard, Loganton and Unionville.

For those driving on Interstate 80, this includes areas between the
Penfield and Jersey Shore exits, specifically between mile markers
117 and 123...between mile markers 125 and 126...between mile markers
133 and 135...and from mile markers 138 to 189.

This includes Interstate 99 from mile markers 67 to 85.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4123 7747 4118 7731 4101 7718 4085 7736
      4072 7736 4065 7769 4066 7771 4068 7768
      4069 7771 4073 7768 4072 7777 4075 7788
      4084 7798 4096 7807 4100 7822 4104 7849
      4127 7783
TIME...MOT...LOC 2236Z 248DEG 33KT 4106 7831 4104 7814 4099 7799 4087
7790 4078 7780 4072 7769

HAIL...1.00IN
WIND...70MPH
 
$$

Jurewicz

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 3:35 PM EDTSpecial Weather StatementCTPFulton40 min
Jul 7, 4:00 PM EDTSpecial Weather StatementCTPWarren45 min
Jul 7, 4:05 PM EDTSpecial Weather StatementCTPSomerset25 min
Jul 7, 4:12 PM EDTSpecial Weather StatementCTPSomerset33 min
Jul 7, 4:12 PM EDTSevere Thunderstorm WarningCTPCambria, Somerset47 min
Jul 7, 4:22 PM EDTSevere Thunderstorm WarningCTPBedford, Somerset38 min
Jul 7, 4:44 PM EDTSevere Thunderstorm WarningCTPCambria61 min
Jul 7, 4:46 PM EDTSpecial Weather StatementCTPWarren29 min
Jul 7, 4:48 PM EDTSpecial Weather StatementCTPBedford27 min
Jul 7, 4:54 PM EDTSevere Thunderstorm WarningCTPBedford, Somerset51 min
Jul 7, 4:59 PM EDTSpecial Weather StatementCTPWarren31 min
Jul 7, 5:07 PM EDTSevere Thunderstorm WarningCTPMcKean, Warren53 min
Jul 7, 5:12 PM EDTSpecial Weather StatementCTPBlair33 min
Jul 7, 5:19 PM EDTSevere Thunderstorm WarningCTPBlair41 min
Jul 7, 5:23 PM EDTSevere Thunderstorm WarningCTPBedford37 min
Jul 7, 5:27 PM EDTSpecial Weather StatementCTPClearfield33 min
Jul 7, 5:35 PM EDTSevere Thunderstorm WarningCTPBlair25 min
Jul 7, 5:38 PM EDTSpecial Weather StatementCTPWarren37 min
Jul 7, 5:42 PM EDTSpecial Weather StatementCTPCumberland33 min
Jul 7, 5:48 PM EDTSevere Thunderstorm WarningCTPBlair, Huntingdon57 min
Jul 7, 5:50 PM EDTSevere Thunderstorm WarningCTPCumberland, Franklin40 min
Jul 7, 5:55 PM EDTSevere Thunderstorm WarningCTPMcKean65 min
Jul 7, 6:00 PM EDTSpecial Weather StatementCTPElk30 min
Jul 7, 6:12 PM EDTSevere Thunderstorm WarningCTPCentre, Clearfield, Huntingdon48 min
Jul 7, 6:22 PM EDTSpecial Weather StatementCTPMifflin23 min
Jul 7, 6:29 PM EDTSevere Thunderstorm WarningCTPWarren61 min
Jul 7, 6:37 PM EDTSevere Thunderstorm WarningCTPCumberland, Franklin, Perry37 min
Jul 7, 6:43 PM EDTSevere Thunderstorm WarningCTPMcKean, Potter77 min
Jul 7, 6:56 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Mifflin, Snyder, Union49 min
Jul 7, 7:09 PM EDTSevere Thunderstorm WarningCTPJuniata, Mifflin, Snyder36 min
Jul 7, 7:19 PM EDTAreal Flood AdvisoryCTPWarren116 min
Jul 7, 7:31 PM EDTSevere Thunderstorm WarningCTPClinton, Lycoming, Montour, Northumberland, Union44 min
Jul 7, 7:44 PM EDTAreal Flood AdvisoryCTPMcKean, Potter2 hr
Jul 7, 7:48 PM EDTSpecial Weather StatementCTPBedford27 min
Jul 7, 7:50 PM EDTSpecial Weather StatementCTPTioga10 min
Jul 7, 7:51 PM EDTSpecial Weather StatementCTPPotter24 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.