Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 79, NWS State College, PA

July 17, 2023Dauphin County, Northumberland County, Perry County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 17, 2023, 7:19 PM EDT for Dauphin County, Northumberland County, Perry County, 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 17, 2023, 7:19 PM EDT (23:19 UTC)
Expired: Jul 17, 2023, 8:00 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 Dauphin County, PA, Northumberland County, PA, Perry County, PA

The radar

The State College radar (KCCX), 100 km from the middle of the area, began a volume at 23:22 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.

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 17, 7:17 PM EDT, 2 minutes earlier.

Area forecast discussion, Jul 17, 7:17 PM EDT, 2 minutes before

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Hazardous weather outlook, Jul 17, 11:01 AM EDT, 8 hours 18 minutes before

Hazardous Weather Outlook
National Weather Service State College PA
1101 AM EDT Mon Jul 17 2023

PAZ004>006-010>012-017>019-024-025-033-034-037-041-042-045-046-
181515-
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Southern Centre-Cambria-Blair-Somerset-Bedford-Tioga-
Northern Lycoming-Sullivan-Southern Clinton-Southern Lycoming-
1101 AM EDT Mon Jul 17 2023

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...This afternoon and tonight.

Strong thunderstorms with gusty winds and briefly heavy rain are
possible late this afternoon and early tonight.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Thunderstorms with heavy rain are possible on Thursday, and may lead
to poor drainage and small stream flooding in some locations.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ026>028-035-036-049>053-056>059-063>066-181515-
Huntingdon-Mifflin-Juniata-Fulton-Franklin-Union-Snyder-Montour-
Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-
Adams-York-Lancaster-
1101 AM EDT Mon Jul 17 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...Tuesday through Sunday.

Thunderstorms with heavy rain are possible on Thursday, and may lead
to poor drainage and small stream flooding in some locations.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Lambert

In the hours before

Special weather statement, Jul 17, 5:51 PM EDT, 1 hour 28 minutes before

Special Weather Statement
National Weather Service State College PA
551 PM EDT Mon Jul 17 2023

PAZ019-027-028-045-049-050-172245-
Southern Clinton PA-Union PA-Juniata PA-Mifflin PA-Snyder PA-
Southern Centre PA-
551 PM EDT Mon Jul 17 2023

...STRONG THUNDERSTORMS WILL IMPACT NORTHEASTERN MIFFLIN...
SOUTHEASTERN CENTRE...NORTH CENTRAL JUNIATA...WESTERN SNYDER...
SOUTHWESTERN UNION AND SOUTHEASTERN CLINTON COUNTIES THROUGH 645 PM
EDT...

At 551 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 13 miles east of Bellefonte to Lewistown.
Movement was northeast at 20 mph.

HAZARD...Wind gusts up to 50 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...
Lewistown, Carroll, Woodward, Burnham, Highland Park, McClure,
Millheim, Beaver Springs, Aaronsburg, Rebersburg, Coburn,
Troxelville, Madisonburg, Alfarata, Weikert, R.B. Winter State Park,
Snyder-Middleswart State Park, Reeds Gap State Park, Belltown and
Laurelton Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

If boating or fishing on or near an area lake, get out of the water
and move indoors or inside a vehicle. Remember, lightning can strike
out to 10 miles from the parent thunderstorm. If you can hear
thunder, you are close enough to be struck by lightning. Move to
safe shelter now! Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4116 7727 4108 7718 4092 7711 4071 7713
      4054 7758 4065 7757 4073 7752 4093 7759
TIME...MOT...LOC 2151Z 234DEG 18KT 4094 7752 4083 7741 4072 7742 4055
7755

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Lambert

Special weather statement, Jul 17, 6:00 PM EDT, 1 hour 19 minutes before

Special Weather Statement
National Weather Service State College PA
600 PM EDT Mon Jul 17 2023

PAZ012-018-172245-
Northern Centre PA-Northern Clinton PA-
600 PM EDT Mon Jul 17 2023

...A STRONG THUNDERSTORM WILL IMPACT NORTH CENTRAL CENTRE AND
NORTHWESTERN CLINTON COUNTIES THROUGH 645 PM EDT...

At 559 PM EDT, Doppler radar was tracking a strong thunderstorm 21
miles north of Bellefonte, 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...
Keating, Renovo, South Renovo, Westport, Glen Union and Hyner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 4145 7759 4144 7760 4144 7758 4138 7754
      4137 7754 4134 7748 4131 7747 4129 7745
      4111 7785 4114 7794 4121 7800 4148 7767
      4148 7764
TIME...MOT...LOC 2159Z 225DEG 20KT 4121 7788

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

Lambert

Special weather statement, Jul 17, 6:04 PM EDT, 1 hour 15 minutes before

Special Weather Statement
National Weather Service State College PA
604 PM EDT Mon Jul 17 2023

PAZ034-172230-
Bedford PA-
604 PM EDT Mon Jul 17 2023

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN BEDFORD COUNTY
THROUGH 630 PM EDT...

At 603 PM EDT, Doppler radar was tracking a strong thunderstorm over
Bedford, moving northeast at 20 mph.

HAZARD...Wind gusts up to 50 mph and penny 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...
Bedford, New Enterprise, Cessna, Saxton, Woodbury, Defiance and
Hopewell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Very heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4010 7859 4026 7835 4026 7834 4025 7829
      4029 7826 4023 7824 4017 7813 4012 7816
      4009 7820 4007 7820 4006 7819 4001 7849
TIME...MOT...LOC 2203Z 242DEG 17KT 4008 7848

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

Evanego

Special weather statement, Jul 17, 6:10 PM EDT, 1 hour 9 minutes before

Special Weather Statement
National Weather Service State College PA
610 PM EDT Mon Jul 17 2023

PAZ028-056-063-172300-
Perry PA-Cumberland PA-Juniata PA-
610 PM EDT Mon Jul 17 2023

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN JUNIATA...
SOUTHWESTERN PERRY AND NORTHWESTERN CUMBERLAND COUNTIES THROUGH 700
PM EDT...

At 609 PM EDT, Doppler radar was tracking a strong thunderstorm 15
miles north of Shippensburg, moving northeast at 20 mph.

HAZARD...Wind gusts up to 50 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...
Honey Grove, Spruce Hill, East Waterford, Colonel Denning State Park,
Loysville, Ickesburg, Shermansdale, Perulack, Big Spring State Park,
Blain, Landisburg and New Germantown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 4021 7761 4023 7761 4022 7764 4023 7765
      4026 7765 4026 7767 4027 7766 4036 7770
      4041 7762 4056 7727 4030 7715 4019 7758
TIME...MOT...LOC 2209Z 245DEG 16KT 4026 7758

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Lambert

Special weather statement, Jul 17, 6:34 PM EDT, 45 minutes before

Special Weather Statement
National Weather Service State College PA
634 PM EDT Mon Jul 17 2023

PAZ019-028-045-046-049>052-172330-
Southern Lycoming PA-Southern Clinton PA-Union PA-Northumberland PA-
Montour PA-Juniata PA-Snyder PA-Southern Centre PA-
634 PM EDT Mon Jul 17 2023

...STRONG THUNDERSTORMS WILL IMPACT NORTHUMBERLAND...EAST CENTRAL
CENTRE...NORTHEASTERN JUNIATA...SNYDER...MONTOUR...SOUTHEASTERN
LYCOMING...UNION AND SOUTHEASTERN CLINTON COUNTIES THROUGH 730 PM
EDT...

At 634 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 12 miles southeast of Jersey Shore to
Mifflinburg to 18 miles southwest of Selinsgrove. Movement was east
northeast at 25 mph.

HAZARD...Wind gusts up to 50 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...
Sunbury, Milton, Lewisburg, Selinsgrove, Danville, Montoursville,
Northumberland, Mifflinburg, Carroll, Winfield, Muncy, Watsontown,
Elysburg, Fairview-Ferndale, Hughesville, Riverside, Trevorton,
Shamokin Dam, Montgomery and Linntown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

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

&&

LAT...LON 4070 7660 4061 7727 4085 7723 4104 7728
      4111 7719 4122 7699 4131 7677 4106 7661
      4105 7657 4100 7657 4097 7653
TIME...MOT...LOC 2234Z 256DEG 23KT 4103 7717 4089 7710 4067 7717

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Lambert

Special weather statement, Jul 17, 6:44 PM EDT, 35 minutes before

Special Weather Statement
National Weather Service State College PA
644 PM EDT Mon Jul 17 2023

PAZ028-050-052-056-057-172330-
Perry PA-Northumberland PA-Juniata PA-Dauphin PA-Snyder PA-
644 PM EDT Mon Jul 17 2023

...STRONG THUNDERSTORMS WILL IMPACT SOUTHWESTERN NORTHUMBERLAND...
NORTHWESTERN DAUPHIN...NORTHEASTERN JUNIATA...SOUTHEASTERN SNYDER AND
PERRY COUNTIES THROUGH 730 PM EDT...

At 643 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 13 miles east of Lewistown to 19 miles
northwest of Enola to near Carlisle. Movement was northeast at 30
mph.

HAZARD...Wind gusts up to 50 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...
Linglestown, Millersburg, Marysville, Newport, Duncannon,
Elizabethville, New Bloomfield, Port Trevorton, Mexico, New Buffalo,
Loysville, Ickesburg, Meiserville, Shermansdale, Rockville,
Liverpool, Port Royal, Halifax, Dauphin and Thompsontown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

If boating or fishing on or near an area lake or river, get out of
the water and move indoors or inside a vehicle. Remember, lightning
can strike out to 10 miles from the parent thunderstorm. If you can
hear thunder, you are close enough to be struck by lightning. Move
to safe shelter now! Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4040 7737 4056 7739 4072 7681 4059 7675
      4036 7679 4029 7716 4029 7724 4027 7730
TIME...MOT...LOC 2243Z 239DEG 26KT 4056 7733 4041 7726 4027 7729

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

Lambert

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 3:51 PM EDT	Special Weather Statement	CTP	Bedford	39 min
Jul 17, 4:04 PM EDT	Special Weather Statement	CTP	Blair, Huntingdon	41 min
Jul 17, 4:24 PM EDT	Special Weather Statement	CTP	Somerset	51 min
Jul 17, 5:05 PM EDT	Special Weather Statement	CTP	Centre, Mifflin	55 min
Jul 17, 5:30 PM EDT	Special Weather Statement	CTP	Huntingdon	45 min
Jul 17, 5:51 PM EDT	Special Weather Statement	CTP	Snyder	54 min
Jul 17, 6:00 PM EDT	Special Weather Statement	CTP	Clinton	45 min
Jul 17, 6:04 PM EDT	Special Weather Statement	CTP	Bedford	26 min
Jul 17, 6:10 PM EDT	Special Weather Statement	CTP	Perry	50 min
Jul 17, 6:34 PM EDT	Special Weather Statement	CTP	Montour, Northumberland, Snyder, Union	56 min
Jul 17, 6:44 PM EDT	Special Weather Statement	CTP	Dauphin, Perry	46 min
Jul 17, 7:42 PM EDT	Special Weather Statement	CTP	Sullivan	48 min
Jul 17, 7:50 PM EDT	Special Weather Statement	CTP	Northumberland	40 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; radar from the NEXRAD Level II archive.