Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 25, NWS State College, PA

May 23, 20245 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 23, 2024, 6:08 AM EDT for 5 counties in Pennsylvania. It was in force for 52 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, 6:08 AM EDT (10:08 UTC)
Expired: May 23, 2024, 7:00 AM EDT
In force: 52 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Columbia County, PA, Montour County, PA, Northumberland County, PA, Snyder County, PA, Union County, PA

The radar

The State College radar (KCCX), 103 km from the middle of the area, began a volume at 10:12 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

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 10.1 hours before the alert went out and 273 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1776 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1103 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 154 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.7

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, 1 hour 21 minutes earlier.

Area forecast discussion, May 23, 4:47 AM EDT, 1 hour 21 minutes before

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Hazardous weather outlook, May 23, 5:10 AM EDT, 58 minutes before

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In the hours before

Special weather statement, May 23, 3:27 AM EDT, 2 hours 41 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, 1 hour 38 minutes before

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Special weather statement, May 23, 4:51 AM EDT, 1 hour 17 minutes before

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Special weather statement, May 23, 5:26 AM EDT, 42 minutes before

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Local storm report, May 23, 5:28 AM EDT, 40 minutes before

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Local storm report, May 23, 5:44 AM EDT, 24 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 12:34 AM EDT	Special Weather Statement	CTP	Warren	56 min
May 23, 3:27 AM EDT	Special Weather Statement	CTP	Blair, Cambria	63 min
May 23, 4:51 AM EDT	Special Weather Statement	CTP	Centre	54 min
May 23, 5:01 AM EDT	Severe Thunderstorm Warning	CTP	Centre, Huntingdon, Mifflin	44 min
May 23, 5:26 AM EDT	Special Weather Statement	CTP	Columbia	49 min
May 23, 5:35 AM EDT	Severe Thunderstorm Warning Considerable damage threat	CTP	Centre, Juniata, Mifflin, Snyder, Union	40 min
May 23, 6:47 AM EDT	Severe Thunderstorm Warning	CTP	Columbia, Montour, Northumberland, Schuylkill	43 min
May 23, 7:09 AM EDT	Special Weather Statement	CTP	Schuylkill	66 min
May 23, 7:32 AM EDT	Areal Flood Advisory	CTP	Columbia, Dauphin, Lebanon, Montour, Northumberland, Schuylkill and 2 more	3 hr
May 23, 7:41 AM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	34 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2024 Every 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.