Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 108, NWS State College, PA

July 28, 2023Lancaster County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 28, 2023, 7:46 PM EDT for Lancaster County, Pennsylvania. It was in force for 14 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 28, 2023, 7:46 PM EDT (23:46 UTC)
Expired
Jul 28, 2023, 8:00 PM EDT
In force
14 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Lancaster County, PA

The radar

The Dover AFB radar (KDOX), 152 km from the middle of the area, began a volume at 23:45 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, 11.8 hours before the alert went out and 157 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 2023-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 945 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 2023-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
945 J/kg
Mixed-layer CIN
-117 J/kg
Mixed-layer LCL
1259 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
114 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 28, 6:42 PM EDT, 1 hour 4 minutes earlier.

Area forecast discussion, Jul 28, 6:42 PM EDT, 1 hour 4 minutes before
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Hazardous weather outlook, Jul 28, 5:00 AM EDT, 14 hours 46 minutes before
Hazardous Weather Outlook
National Weather Service State College PA
500 AM EDT Fri Jul 28 2023

PAZ004-005-290900-
Warren-McKean-
500 AM EDT Fri Jul 28 2023

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Strong to severe thunderstorms with gusty winds and heavy rain are
possible this evening through tonight.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ006-012-037-041-042-290900-
Potter-Northern Clinton-Tioga-Northern Lycoming-Sullivan-
500 AM EDT Fri Jul 28 2023

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

The probability for widespread hazardous weather is low.

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

Strong thunderstorms with gusty winds and heavy rain are possible
during the day on Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ046-049>053-057>059-290900-
Southern Lycoming-Union-Snyder-Montour-Northumberland-Columbia-
Dauphin-Schuylkill-Lebanon-
500 AM EDT Fri Jul 28 2023

...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Heat Advisory.

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

Strong thunderstorms with gusty winds and heavy rain are possible
during the day on Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ045-290900-
Southern Clinton-
500 AM EDT Fri Jul 28 2023

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Heat Advisory.

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

Strong thunderstorms with gusty winds and heavy rain are possible
during the day on Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ028-036-056-063-290900-
Juniata-Franklin-Perry-Cumberland-
500 AM EDT Fri Jul 28 2023

...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Heat Advisory.

Strong thunderstorms with gusty winds and heavy rain are possible
tonight.

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

Strong thunderstorms with gusty winds and heavy rain are possible
during the day on Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ010-011-017-018-024-033-290900-
Elk-Cameron-Clearfield-Northern Centre-Cambria-Somerset-
500 AM EDT Fri Jul 28 2023

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Strong thunderstorms with gusty winds and heavy rain are possible
this evening through tonight.

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

Strong thunderstorms with gusty winds and heavy rain are possible
during the day on Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ019-025>027-034-035-290900-
Southern Centre-Blair-Huntingdon-Mifflin-Bedford-Fulton-
500 AM EDT Fri Jul 28 2023

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Heat Advisory.

Strong thunderstorms with gusty winds and heavy rain are possible
tonight.

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

Strong thunderstorms with gusty winds and heavy rain are possible
during the day on Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ064-065-290900-
Adams-York-
500 AM EDT Fri Jul 28 2023

...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Heat Advisory.

Strong thunderstorms with gusty winds and heavy rain are possible
late tonight.

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

Widely scattered strong to severe thunderstorms are possible Saturday
afternoon and evening.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ066-290900-
Lancaster-
500 AM EDT Fri Jul 28 2023

...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Heat Advisory.

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

Widely scattered strong to severe thunderstorms are possible Saturday
afternoon and evening.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

MRS

In the hours before

Special weather statement, Jul 28, 6:22 PM EDT, 1 hour 24 minutes before
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Special weather statement, Jul 28, 6:30 PM EDT, 1 hour 16 minutes before
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Special weather statement, Jul 28, 6:45 PM EDT, 1 hour 1 minute before
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Special weather statement, Jul 28, 6:46 PM EDT, 1 hour before
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Special weather statement, Jul 28, 6:49 PM EDT, 57 minutes before
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Special weather statement, Jul 28, 7:34 PM EDT, 12 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 3:28 PM EDTSpecial Weather StatementCTPHuntingdon32 min
Jul 28, 4:03 PM EDTSpecial Weather StatementCTPHuntingdon27 min
Jul 28, 4:26 PM EDTSevere Thunderstorm WarningCTPCumberland, Franklin, Perry34 min
Jul 28, 5:15 PM EDTSevere Thunderstorm WarningCTPAdams, Cumberland, Franklin45 min
Jul 28, 5:40 PM EDTSevere Thunderstorm WarningCTPAdams, York50 min
Jul 28, 6:18 PM EDTSpecial Weather StatementCTPYork27 min
Jul 28, 6:22 PM EDTSpecial Weather StatementCTPYork23 min
Jul 28, 6:30 PM EDTSpecial Weather StatementCTPAdams45 min
Jul 28, 6:45 PM EDTSpecial Weather StatementCTPLancaster60 min
Jul 28, 6:46 PM EDTSpecial Weather StatementCTPYork59 min
Jul 28, 6:49 PM EDTSpecial Weather StatementCTPWarren26 min
Jul 28, 7:02 PM EDTAreal Flood AdvisoryCTPWarren118 min
Jul 28, 7:34 PM EDTSpecial Weather StatementCTPLancaster26 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.