Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 72, NWS State College, PA

July 14, 20236 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 14, 2023, 4:21 PM EDT for 6 counties in Pennsylvania. It was in force for 39 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, 4:21 PM EDT (20:21 UTC)
Expired: Jul 14, 2023, 5:00 PM EDT
In force: 39 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Centre County, PA, Clinton County, PA, Lycoming County, PA, Montour County, PA, Northumberland County, PA, Union County, PA

The radar

The State College radar (KCCX), 72 km from the middle of the area, began a volume at 20:20 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, 8.4 hours before the alert went out and 235 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: 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, 50 minutes earlier.

Area forecast discussion, Jul 14, 3:31 PM EDT, 50 minutes before

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Hazardous weather outlook, Jul 14, 11:39 AM EDT, 4 hours 42 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

Special weather statement, Jul 14, 2:51 PM EDT, 1 hour 30 minutes before

Special Weather Statement
National Weather Service State College PA
251 PM EDT Fri Jul 14 2023

PAZ025-026-141915-
Blair PA-Huntingdon PA-
251 PM EDT Fri Jul 14 2023

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN HUNTINGDON AND
NORTHEASTERN BLAIR COUNTIES THROUGH 315 PM EDT...

At 251 PM EDT, Doppler radar was tracking a strong thunderstorm near
Sinking Valley, moving northeast at 25 mph.

HAZARD...Wind gusts of 50 to 55 mph and pea size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Tyrone, Bald Eagle, Bellwood, Warriors Mark, Tipton, Spruce Creek,
Birmingham, Franklinville, Sinking Valley, Alexandria and Delgrosso's
Amusement Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4058 7834 4074 7821 4074 7812 4069 7794
      4070 7793 4069 7790 4050 7817
TIME...MOT...LOC 1851Z 218DEG 23KT 4059 7820

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

Travis

Local storm report, Jul 14, 3:34 PM EDT, 47 minutes before

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Local storm report, Jul 14, 3:38 PM EDT, 43 minutes before

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Local storm report, Jul 14, 3:57 PM EDT, 24 minutes before

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Local storm report, Jul 14, 4:01 PM EDT, 20 minutes before

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Local storm report, Jul 14, 4:06 PM EDT, 15 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
Jul 13, 8:08 PM EDT	Special Weather Statement	CTP	Tioga	52 min
Jul 13, 9:56 PM EDT	Special Weather Statement	CTP	Clearfield	49 min
Jul 13, 10:04 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria, Clearfield	56 min
Jul 13, 10:57 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield	48 min
Jul 13, 11:34 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Centre, Clearfield, Clinton	41 min
Jul 13, 11:59 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Lycoming, Union	46 min
Jul 14, 12:36 AM EDT	Special Weather Statement	CTP	Lycoming	39 min
Jul 14, 1:14 AM EDT	Special Weather Statement	CTP	Sullivan	61 min
Jul 14, 12:03 PM EDT	Special Weather Statement	CTP	Somerset	27 min
Jul 14, 12:31 PM EDT	Special Weather Statement	CTP	Bedford	29 min
Jul 14, 1:04 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Somerset	56 min
Jul 14, 1:36 PM EDT	Special Weather Statement	CTP	Cambria	24 min
Jul 14, 2:02 PM EDT	Special Weather Statement	CTP	Blair	28 min
Jul 14, 2:29 PM EDT	Special Weather Statement	CTP	Blair	31 min
Jul 14, 2:38 PM EDT	Special Weather Statement	CTP	Huntingdon	37 min
Jul 14, 2:51 PM EDT	Special Weather Statement	CTP	Blair	24 min
Jul 14, 3:11 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Huntingdon, Mifflin	49 min
Jul 14, 3:48 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clinton, Mifflin, Union	42 min
Jul 14, 4:25 PM EDT	Special Weather Statement	CTP	Lancaster	50 min
Jul 14, 5:04 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Montour, Northumberland, Sullivan, Union	41 min
Jul 14, 5:12 PM EDT	Special Weather Statement	CTP	Lycoming	33 min
Jul 14, 5:16 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming, Sullivan	44 min
Jul 14, 6:01 PM EDT	Special Weather Statement	CTP	York	44 min
Jul 14, 6:16 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	44 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2023 Every 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.