Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 67, NWS State College, PA

June 30, 2021Cumberland County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 30, 2021, 6:27 PM EDT for Cumberland County, Pennsylvania. It was in force for 48 min. 5 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 30, 2021, 6:27 PM EDT (22:27 UTC)
Expired
Jun 30, 2021, 7:15 PM EDT
In force
48 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Cumberland County, PA

The radar

The State College radar (KCCX), 117 km from the middle of the area, began a volume at 22:32 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 30, 6:35 PM EDTTSTM WND DMG4 Wnw Mount Holly Sprin, PAMULTIPLE TREES AND WIRES DOWN ACROSS DICKINSON TOWNSHIP.
Jun 30, 6:36 PM EDTTSTM WND DMG4 W Mount Holly Spring, PAMULTIPLE TREES DOWN ON PINE RD.
Jun 30, 6:42 PM EDTTSTM WND DMG1 W Mount Holly Spring, PAMULTIPLE TREES AND WIRES DOWN ON SANDBANK RD.
Jun 30, 6:50 PM EDTTSTM WND DMG4 Ene Boiling Springs, PAMULTIPLE REPORTS OF TREES DOWN ACROSS MONROE TOWNSHIP.
Jun 30, 6:55 PM EDTTSTM WND DMG2 Sse Mechanicsburg, PAMULTIPLE REPORTS OF TREES DOWN ACROSS UPPER AND LOWER ALLEN TOWNSHIPS.

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 30, 4:51 PM EDTSevere Thunderstorm WatchSPC3 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.5 hours before the alert went out and 136 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, Washington/Dulle, VA at 12:00Z on 2021-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 40 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2021-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 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
40 J/kg
Mixed-layer CIN
-217 J/kg
Mixed-layer LCL
1553 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

124 
WUUS51 KCTP 302227
SVRCTP
PAC041-302315-
/O.NEW.KCTP.SV.W.0067.210630T2227Z-210630T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
627 PM EDT Wed Jun 30 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Central Cumberland County in south central Pennsylvania...

* Until 715 PM EDT.

* At 626 PM EDT, a severe thunderstorm was located near Walnut
  Bottom, moving east at 45 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...
  Harrisburg, Carlisle, Lower Allen, Mechanicsburg, Camp Hill, New
  Cumberland, Enola, Lemoyne, Plainfield, Schlusser, Boiling Springs,
  Wormleysburg, Mount Holly Springs, Shiremanstown, Newville, West
  Fairview, New Kingstown, Hogestown, Walnut Bottom and Pine Grove
  Furnace.

This includes the following Interstates...
 The Pennsylvania Turnpike from mile markers 221 to 239.
 Interstate 81 from mile markers 31 to 55.
 Interstate 83 from mile markers 40 to 42.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3997 7745 4016 7746 4029 7692 4023 7686
      4021 7689 4023 7690 4020 7693 4019 7691
      4019 7693 4016 7691 4016 7698 4015 7698
      4015 7703 4003 7719 4000 7739
TIME...MOT...LOC 2226Z 249DEG 38KT 4011 7733 

HAIL...1.00IN
WIND...60MPH
 
$$

KF
1 follow-up statement
216 
WWUS51 KCTP 302311
SVSCTP

Severe Weather Statement
National Weather Service State College PA
711 PM EDT Wed Jun 30 2021

PAC041-302320-
/O.EXP.KCTP.SV.W.0067.000000T0000Z-210630T2315Z/
Cumberland PA-
711 PM EDT Wed Jun 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CUMBERLAND COUNTY WILL
EXPIRE AT 715 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and is exiting the warned area. Therefore, the warning 
will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
south central Pennsylvania.

LAT...LON 3997 7745 4016 7746 4029 7692 4023 7686
      4021 7689 4023 7690 4020 7693 4019 7691
      4019 7693 4016 7691 4016 7698 4015 7698
      4015 7703 4003 7719 4000 7739
TIME...MOT...LOC 2310Z 249DEG 38KT 4027 7679 

$$

KF

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 8:56 PM EDTHeat AdvisoryCTPColumbia, Dauphin, Lancaster, Lebanon, Lycoming, Montour and 5 more22 hr
Jun 29, 9:10 PM EDTSpecial Weather StatementCTPCentre20 min
Jun 29, 9:16 PM EDTSevere Thunderstorm WarningCTPMcKean, Warren89 min
Jun 29, 9:27 PM EDTSpecial Weather StatementCTPCentre18 min
Jun 29, 9:30 PM EDTSevere Thunderstorm WarningCTPCentre45 min
Jun 29, 10:17 PM EDTSpecial Weather StatementCTPSullivan28 min
Jun 29, 10:27 PM EDTSpecial Weather StatementCTPPotter33 min
Jun 29, 10:42 PM EDTSevere Thunderstorm WarningCTPPotter, Tioga63 min
Jun 29, 10:59 PM EDTSpecial Weather StatementCTPLycoming31 min
Jun 29, 11:23 PM EDTSpecial Weather StatementCTPSullivan22 min
Jun 29, 11:38 PM EDTSpecial Weather StatementCTPTioga67 min
Jun 29, 11:39 PM EDTSpecial Weather StatementCTPSullivan66 min
Jun 30, 6:59 AM EDTSpecial Weather StatementCTPMcKean46 min
Jun 30, 1:13 PM EDTSpecial Weather StatementCTPWarren47 min
Jun 30, 1:46 PM EDTSpecial Weather StatementCTPClinton29 min
Jun 30, 1:59 PM EDTSpecial Weather StatementCTPMcKean46 min
Jun 30, 2:14 PM EDTSevere Thunderstorm WarningCTPClinton, Lycoming50 min
Jun 30, 2:25 PM EDTSevere Thunderstorm WarningCTPCambria28 min
Jun 30, 3:15 PM EDTSpecial Weather StatementCTPCambria45 min
Jun 30, 3:24 PM EDTSpecial Weather StatementCTPCentre36 min
Jun 30, 3:46 PM EDTSevere Thunderstorm WarningCTPCentre, Montour, Northumberland, Snyder, Union44 min
Jun 30, 3:59 PM EDTSpecial Weather StatementCTPSomerset46 min
Jun 30, 4:22 PM EDTSpecial Weather StatementCTPJuniata38 min
Jun 30, 4:42 PM EDTSpecial Weather StatementCTPColumbia, Montour48 min
Jun 30, 5:05 PM EDTSpecial Weather StatementCTPFulton40 min
Jun 30, 5:24 PM EDTSevere Thunderstorm WarningCTPFranklin, Fulton48 min
Jun 30, 6:10 PM EDTSpecial Weather StatementCTPCumberland35 min
Jun 30, 7:00 PM EDTSpecial Weather StatementCTPDauphin15 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.