Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 23, NWS State College, PA

May 23, 2024Centre County, Huntingdon County, Mifflin County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 23, 2024, 5:01 AM EDT for Centre County, Huntingdon County, Mifflin County, Pennsylvania. It was in force for 44 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
May 23, 2024, 5:01 AM EDT (09:01 UTC)
Expired
May 23, 2024, 5:45 AM EDT
In force
44 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Centre County, PA, Huntingdon County, PA, Mifflin County, PA

The radar

The State College radar (KCCX), 35 km from the middle of the area, began a volume at 09:02 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

Pittsburgh, PA (KPIT), launched 00:00Z, 9.0 hours before the alert went out and 196 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 00:00Z on 2024-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 904 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, Pittsburgh, PA at 00:00Z on 2024-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 square meters per square second.1939587897Sfc1 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
904 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1287 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.3

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 May 23, 4:47 AM EDT, 14 minutes earlier.

Area forecast discussion, May 23, 4:47 AM EDT, 14 minutes before
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Hazardous weather outlook, May 22, 8:03 PM EDT, 8 hours 58 minutes before
Hazardous Weather Outlook
National Weather Service State College PA
803 PM EDT Wed May 22 2024

PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053-
056>058-063-240015-
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin-
Juniata-Somerset-Bedford-Fulton-Franklin-Tioga-Northern Lycoming-
Sullivan-Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-Perry-Dauphin-Schuylkill-Cumberland-
803 PM EDT Wed May 22 2024

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ059-064>066-240015-
Lebanon-Adams-York-Lancaster-
803 PM EDT Wed May 22 2024

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Isolated strong to severe thunderstorms with gusty winds are
possible Thursday afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

In the hours before

Special weather statement, May 23, 12:34 AM EDT, 4 hours 27 minutes before
Special Weather Statement
National Weather Service State College PA
1234 AM EDT Thu May 23 2024

PAZ004-005-230530-
McKean PA-Warren PA-
1234 AM EDT Thu May 23 2024

...STRONG THUNDERSTORMS WILL IMPACT WARREN AND WESTERN MCKEAN
COUNTIES THROUGH 130 AM EDT...

At 1233 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Jamestown to 14 miles west of Warren to 23
miles northwest of Marienville. Movement was east at 45 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Warren, Allegany State Park, Sheffield, Youngsville, Wetmore,
Russell, Spring Creek, Scandia, Lottsville, Ludlow, Marshburg,
Westline, Warren South, Garland, Kinzua Dam, Chapman State Park,
Sugar Grove, Starbrick, Clarendon, and Bear Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

Persons in campgrounds should consider seeking sturdy shelter until
these storms pass.

&&

LAT...LON 4200 7869 4193 7869 4169 7874 4170 7946
      4188 7956 4196 7954 4200 7949
TIME...MOT...LOC 0433Z 261DEG 38KT 4201 7937 4188 7941 4172 7943

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

Lambert
Special weather statement, May 23, 3:27 AM EDT, 1 hour 34 minutes before
Special Weather Statement
National Weather Service State College PA
327 AM EDT Thu May 23 2024

PAZ024-025-033-230830-
Somerset PA-Blair PA-Cambria PA-
327 AM EDT Thu May 23 2024

...A STRONG THUNDERSTORM WILL IMPACT NORTH CENTRAL SOMERSET...CENTRAL
BLAIR AND CAMBRIA COUNTIES THROUGH 430 AM EDT...

At 326 AM EDT, Doppler radar was tracking a strong thunderstorm over
Westmont, moving northeast at 45 mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Altoona, Johnstown, Hollidaysburg, Westmont, Ebensburg, Belmont,
Nanty-Glo, Portage, Geistown, Southmont, Lakemont, Bellwood, Cresson,
Gallitzin, Vinco, Loretto, Williamsburg, Dale, Duncansville, and East
Conemaugh.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.

&&

LAT...LON 4036 7900 4045 7894 4073 7844 4073 7838
      4047 7814 4021 7898 4026 7908
TIME...MOT...LOC 0726Z 239DEG 40KT 4033 7896

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Lambert/Beaty
Local storm report, May 23, 4:30 AM EDT, 31 minutes before
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Special weather statement, May 23, 4:51 AM EDT, 10 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 12:34 AM EDTSpecial Weather StatementCTPWarren56 min
May 23, 3:27 AM EDTSpecial Weather StatementCTPBlair, Cambria63 min
May 23, 4:51 AM EDTSpecial Weather StatementCTPCentre54 min
May 23, 5:26 AM EDTSpecial Weather StatementCTPColumbia49 min
May 23, 5:35 AM EDTSevere Thunderstorm Warning Considerable damage threatCTPCentre, Juniata, Mifflin, Snyder, Union40 min
May 23, 6:08 AM EDTSevere Thunderstorm WarningCTPColumbia, Montour, Northumberland, Snyder, Union52 min
May 23, 6:47 AM EDTSevere Thunderstorm WarningCTPColumbia, Montour, Northumberland, Schuylkill43 min
May 23, 7:09 AM EDTSpecial Weather StatementCTPSchuylkill66 min
May 23, 7:32 AM EDTAreal Flood AdvisoryCTPColumbia, Dauphin, Lebanon, Montour, Northumberland, Schuylkill and 2 more3 hr
May 23, 7:41 AM EDTSevere Thunderstorm WarningCTPSchuylkill34 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2024Every severe thunderstorm warning in 2024

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.