Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 73, NWS State College, PA

July 14, 20235 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 14, 2023, 5:04 PM EDT for 5 counties in Pennsylvania. It was in force for 41 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
Jul 14, 2023, 5:04 PM EDT (21:04 UTC)
Expired
Jul 14, 2023, 5:45 PM EDT
In force
41 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Lycoming County, PA, Montour County, PA, Northumberland County, PA, Sullivan County, PA, Union County, PA

The radar

The State College radar (KCCX), 103 km from the middle of the area, began a volume at 21:07 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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.1 hours before the alert went out and 247 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 2023-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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 2023-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.19395878Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1055 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
93 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 Jul 14, 3:31 PM EDT, 1 hour 33 minutes earlier.

Area forecast discussion, Jul 14, 3:31 PM EDT, 1 hour 33 minutes before
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Hazardous weather outlook, Jul 14, 11:39 AM EDT, 5 hours 25 minutes before
Hazardous Weather Outlook
National Weather Service State College PA
1139 AM EDT Fri Jul 14 2023

PAZ004>006-010>012-017>019-024>027-033>035-045-151545-
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin-
Somerset-Bedford-Fulton-Southern Clinton-
1139 AM EDT Fri Jul 14 2023

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...This afternoon and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

A wave of low pressure at the surface and aloft will bring
a likelihood of thunderstorms Saturday night into Sunday morning.
Frequent dangerous cloud to ground lightning, localized gusty
winds and heavy rainfall are all possible with the round of
mainly nocturnal thunderstorms.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ028-036-037-041-042-046-049>053-056>059-063>066-151545-
Juniata-Franklin-Tioga-Northern Lycoming-Sullivan-Southern Lycoming-
Union-Snyder-Montour-Northumberland-Columbia-Perry-Dauphin-
Schuylkill-Lebanon-Cumberland-Adams-York-Lancaster-
1139 AM EDT Fri Jul 14 2023

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...This afternoon and tonight.

An upper level disturbance approaching from the Middle Ohio
River Valley will combine with the humidity and warmth to spark
scattered to numerous showers and thunderstorms this afternoon
across primarily eastern half of the state.

Some of the storms could produce localized strong wind gusts,
heavy rainfall and up to penny sized hail.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

A wave of low pressure at the surface and aloft will bring
a likelihood of thunderstorms Saturday night into Sunday morning.
Frequent dangerous cloud to ground lightning, localized gusty
winds and heavy rainfall are all possible with the round of
mainly nocturnal thunderstorms.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

In the hours before

Local storm report, Jul 14, 4:28 PM EDT, 36 minutes before
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Local storm report, Jul 14, 4:31 PM EDT, 33 minutes before
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Local storm report, Jul 14, 4:43 PM EDT, 21 minutes before
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Local storm report, Jul 14, 4:47 PM EDT, 17 minutes before
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Local storm report, Jul 14, 5:01 PM EDT, 3 minutes before
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Local storm report, Jul 14, 5:04 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 8:08 PM EDTSpecial Weather StatementCTPTioga52 min
Jul 13, 9:56 PM EDTSpecial Weather StatementCTPClearfield49 min
Jul 13, 10:04 PM EDTSevere Thunderstorm WarningCTPBlair, Cambria, Clearfield56 min
Jul 13, 10:57 PM EDTSevere Thunderstorm WarningCTPCameron, Centre, Clearfield48 min
Jul 13, 11:34 PM EDTSevere Thunderstorm WarningCTPCameron, Centre, Clearfield, Clinton41 min
Jul 13, 11:59 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Lycoming, Union46 min
Jul 14, 12:36 AM EDTSpecial Weather StatementCTPLycoming39 min
Jul 14, 1:14 AM EDTSpecial Weather StatementCTPSullivan61 min
Jul 14, 12:03 PM EDTSpecial Weather StatementCTPSomerset27 min
Jul 14, 12:31 PM EDTSpecial Weather StatementCTPBedford29 min
Jul 14, 1:04 PM EDTSevere Thunderstorm WarningCTPBedford, Somerset56 min
Jul 14, 1:36 PM EDTSpecial Weather StatementCTPCambria24 min
Jul 14, 2:02 PM EDTSpecial Weather StatementCTPBlair28 min
Jul 14, 2:29 PM EDTSpecial Weather StatementCTPBlair31 min
Jul 14, 2:38 PM EDTSpecial Weather StatementCTPHuntingdon37 min
Jul 14, 2:51 PM EDTSpecial Weather StatementCTPBlair24 min
Jul 14, 3:11 PM EDTSevere Thunderstorm WarningCTPCentre, Huntingdon, Mifflin49 min
Jul 14, 3:48 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Mifflin, Union42 min
Jul 14, 4:21 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Lycoming, Montour, Northumberland, Union39 min
Jul 14, 4:25 PM EDTSpecial Weather StatementCTPLancaster50 min
Jul 14, 5:12 PM EDTSpecial Weather StatementCTPLycoming33 min
Jul 14, 5:16 PM EDTSevere Thunderstorm WarningCTPLycoming, Sullivan44 min
Jul 14, 6:01 PM EDTSpecial Weather StatementCTPYork44 min
Jul 14, 6:16 PM EDTSevere Thunderstorm WarningCTPLancaster, York44 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.