Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 155, NWS State College, PA

September 7, 2023Dauphin County, Perry County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Sep 7, 2023, 1:48 PM EDT for Dauphin County, Perry County, Pennsylvania. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 7, 2023, 1:48 PM EDT (17:48 UTC)
Expired
Sep 7, 2023, 2:30 PM EDT
In force
42 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Dauphin County, PA, Perry County, PA

The radar

The State College radar (KCCX), 101 km from the middle of the area, began a volume at 17:50 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.

IssuedProductOfficeLasted
Sep 7, 1:14 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.8 hours before the alert went out and 165 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 2023-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2091 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 2023-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 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
2091 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1114 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 7, 1:47 PM EDT, 1 minute earlier.

Area forecast discussion, Sep 7, 1:47 PM EDT, 1 minute before
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Hazardous weather outlook, Sep 7, 1:34 PM EDT, 14 minutes before
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In the hours before

Special weather statement, Sep 7, 1:00 PM EDT, 48 minutes before
Special Weather Statement
National Weather Service State College PA
100 PM EDT Thu Sep 7 2023

PAZ017>019-071730-
Northern Centre PA-Clearfield PA-Southern Centre PA-
100 PM EDT Thu Sep 7 2023

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN CLEARFIELD AND
SOUTHWESTERN CENTRE COUNTIES THROUGH 130 PM EDT...

At 100 PM EDT, Doppler radar was tracking a strong thunderstorm near
Tyrone, moving northeast at 25 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Philipsburg, Stormstown, Osceola Mills, Chester Hill, North
Philipsburg, Port Matilda, South Philipsburg, Sandy Ridge, Julian,
Black Moshannon State Park, Morrisdale, Grassflat, Kylertown and
Unionville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4104 7820 4091 7787 4073 7808 4074 7811
      4074 7828 4079 7832
TIME...MOT...LOC 1700Z 210DEG 23KT 4082 7817

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

CTP
Special weather statement, Sep 7, 1:17 PM EDT, 31 minutes before
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Special weather statement, Sep 7, 1:18 PM EDT, 30 minutes before
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Special weather statement, Sep 7, 1:24 PM EDT, 24 minutes before
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Local storm report, Sep 7, 1:26 PM EDT, 22 minutes before
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Local storm report, Sep 7, 1:35 PM EDT, 13 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 11:20 AM EDTSpecial Weather StatementCTPBedford40 min
Sep 7, 12:01 PM EDTSpecial Weather StatementCTPFulton44 min
Sep 7, 12:21 PM EDTSevere Thunderstorm WarningCTPBedford, Fulton, Huntingdon39 min
Sep 7, 12:57 PM EDTSevere Thunderstorm WarningCTPHuntingdon, Mifflin48 min
Sep 7, 1:00 PM EDTSpecial Weather StatementCTPCentre30 min
Sep 7, 1:17 PM EDTSpecial Weather StatementCTPClinton28 min
Sep 7, 1:18 PM EDTSpecial Weather StatementCTPPerry42 min
Sep 7, 1:21 PM EDTSevere Thunderstorm WarningCTPCumberland, Juniata, Perry39 min
Sep 7, 1:24 PM EDTSpecial Weather StatementCTPFranklin36 min
Sep 7, 1:28 PM EDTSevere Thunderstorm WarningCTPCentre, Huntingdon, Mifflin47 min
Sep 7, 1:52 PM EDTSevere Thunderstorm WarningCTPJuniata, Mifflin, Snyder53 min
Sep 7, 1:54 PM EDTSpecial Weather StatementCTPJuniata36 min
Sep 7, 2:00 PM EDTSpecial Weather StatementCTPCumberland30 min
Sep 7, 2:04 PM EDTSpecial Weather StatementCTPAdams26 min
Sep 7, 2:05 PM EDTSpecial Weather StatementCTPClinton25 min
Sep 7, 2:11 PM EDTSpecial Weather StatementCTPClinton34 min
Sep 7, 2:15 PM EDTSevere Thunderstorm WarningCTPCumberland, Juniata, Perry45 min
Sep 7, 2:18 PM EDTSpecial Weather StatementCTPLycoming27 min
Sep 7, 2:25 PM EDTSpecial Weather StatementCTPSnyder35 min
Sep 7, 2:29 PM EDTSpecial Weather StatementCTPAdams31 min
Sep 7, 2:32 PM EDTSevere Thunderstorm WarningCTPDauphin, Northumberland, Perry, Snyder58 min
Sep 7, 2:34 PM EDTSevere Thunderstorm WarningCTPClinton, Lycoming41 min
Sep 7, 2:35 PM EDTSpecial Weather StatementCTPSnyder25 min
Sep 7, 2:44 PM EDTSpecial Weather StatementCTPLycoming46 min
Sep 7, 2:46 PM EDTSpecial Weather StatementCTPCarbon29 min
Sep 7, 2:55 PM EDTSevere Thunderstorm WarningCTPCumberland, Perry35 min
Sep 7, 2:57 PM EDTSevere Thunderstorm WarningCTPLycoming48 min
Sep 7, 2:59 PM EDTSevere Thunderstorm WarningCTPDauphin, Perry46 min
Sep 7, 3:11 PM EDTSevere Thunderstorm WarningCTPAdams38 min
Sep 7, 3:20 PM EDTSpecial Weather StatementCTPYork25 min
Sep 7, 3:30 PM EDTSevere Thunderstorm WarningCTPColumbia, Schuylkill45 min
Sep 7, 3:33 PM EDTSevere Thunderstorm WarningCTPDauphin, Lebanon, Schuylkill, York42 min
Sep 7, 3:37 PM EDTSpecial Weather StatementCTPColumbia, Montour38 min
Sep 7, 3:42 PM EDTSevere Thunderstorm WarningCTPAdams, Dauphin, Lancaster, York48 min
Sep 7, 3:46 PM EDTSpecial Weather StatementCTPTioga44 min
Sep 7, 3:58 PM EDTSevere Thunderstorm WarningCTPColumbia, Lycoming, Sullivan47 min
Sep 7, 4:20 PM EDTSpecial Weather StatementCTPSchuylkill40 min
Sep 7, 4:22 PM EDTSevere Thunderstorm WarningCTPDauphin, Lancaster, Lebanon, York53 min
Sep 7, 4:32 PM EDTSpecial Weather StatementCTPWarren28 min
Sep 7, 4:41 PM EDTSevere Thunderstorm WarningCTPColumbia, Lebanon, Schuylkill49 min
Sep 7, 5:01 PM EDTSevere Thunderstorm WarningCTPSchuylkill44 min
Sep 7, 5:11 PM EDTSevere Thunderstorm WarningCTPLancaster, York34 min
Sep 7, 5:23 PM EDTSpecial Weather StatementCTPAdams37 min
Sep 7, 5:37 PM EDTSevere Thunderstorm WarningCTPAdams, York23 min
Sep 7, 5:59 PM EDTSpecial Weather StatementCTPYork31 min
Sep 7, 6:16 PM EDTSevere Thunderstorm WarningCTPYork44 min
Sep 7, 6:44 PM EDTSevere Thunderstorm WarningCTPLancaster, York73 min
Sep 7, 7:01 PM EDTSpecial Weather StatementCTPLebanon14 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2023Every severe thunderstorm warning in 2023

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.