Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 98, NWS State College, PA

June 30, 2024Columbia County, Northumberland County, Schuylkill County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 30, 2024, 2:14 PM EDT for Columbia County, Northumberland County, Schuylkill County, Pennsylvania. It was in force for 31 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
Jun 30, 2024, 2:14 PM EDT (18:14 UTC)
Expired
Jun 30, 2024, 2:45 PM EDT
In force
31 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Columbia County, PA, Northumberland County, PA, Schuylkill County, PA

The radar

The State College radar (KCCX), 131 km from the middle of the area, began a volume at 18:14 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 30, 11:09 AM EDTSevere Thunderstorm WatchSPC10 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.2 hours before the alert went out and 228 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 2024-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 958 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 2024-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.193958Sfc1 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
958 J/kg
Mixed-layer CIN
-163 J/kg
Mixed-layer LCL
1517 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 Jun 30, 2:13 PM EDT, 1 minute earlier.

Area forecast discussion, Jun 30, 2:13 PM EDT, 1 minute before
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Hazardous weather outlook, Jun 30, 1:44 PM EDT, 30 minutes before
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In the hours before

Special weather statement, Jun 30, 11:52 AM EDT, 2 hours 22 minutes before
Special Weather Statement
National Weather Service State College PA
1152 AM EDT Sun Jun 30 2024

PAZ041-042-046-053-301615-
Columbia PA-Southern Lycoming PA-Sullivan PA-Northern Lycoming PA-
1152 AM EDT Sun Jun 30 2024

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN LYCOMING...NORTH
CENTRAL COLUMBIA AND SULLIVAN COUNTIES THROUGH 1215 PM EDT...

At 1151 AM EDT, Doppler radar was tracking a strong thunderstorm
near Montoursville, moving east at 45 mph. Other storms were forming
just west of this storm.

HAZARD...Wind gusts up to 40 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 is
         possible.

Locations impacted include...
Williamsport, Montoursville, Hughesville, Duboistown, Jamison City,
Kettle Creek Gorge, Ricketts Glen State Park, Central, Biggertown,
Muncy Valley, Barbours, Loyalsockville, South Williamsport, Picture
Rocks, Laporte, Eagles Mere, Williamsport Airport, and Little League
World Series Complex.

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.

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.

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
central and north central Pennsylvania.

&&

LAT...LON 4149 7624 4131 7631 4126 7632 4119 7709
      4140 7691 4153 7622
TIME...MOT...LOC 1551Z 259DEG 37KT 4133 7679

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Martin
Special weather statement, Jun 30, 12:08 PM EDT, 2 hours 6 minutes before
Special Weather Statement
National Weather Service State College PA
1208 PM EDT Sun Jun 30 2024

PAZ017-018-301645-
Northern Centre PA-Clearfield PA-
1208 PM EDT Sun Jun 30 2024

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN CLEARFIELD AND
NORTHWESTERN CENTRE COUNTIES THROUGH 1245 PM EDT...

At 1208 PM EDT, Doppler radar was tracking a strong thunderstorm 11
miles east of Clearfield, moving east at 35 mph.

HAZARD...Wind gusts up to 40 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 is
         possible.

Locations impacted include...
Karthaus, Snow Shoe, Clarence, Moshannon, Pine Glen, Lecontes Mills,
Grassflat, and Kylertown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
central and north central Pennsylvania.

&&

LAT...LON 4116 7787 4094 7792 4099 7834 4113 7831
      4115 7801 4114 7801 4115 7800
TIME...MOT...LOC 1608Z 274DEG 30KT 4104 7823

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Bauco
Special weather statement, Jun 30, 12:27 PM EDT, 1 hour 47 minutes before
Special Weather Statement
National Weather Service State College PA
1227 PM EDT Sun Jun 30 2024

PAZ042-046-053-301700-
Columbia PA-Southern Lycoming PA-Sullivan PA-
1227 PM EDT Sun Jun 30 2024

...A STRONG THUNDERSTORM WILL IMPACT EAST CENTRAL LYCOMING...NORTHERN
COLUMBIA AND SOUTHEASTERN SULLIVAN COUNTIES THROUGH 100 PM EDT...

At 1227 PM EDT, Doppler radar was tracking a strong thunderstorm 17
miles north of Bloomsburg, moving east at 35 mph.

HAZARD...Wind gusts up to 40 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 is
         possible.

Locations impacted include...
Hughesville, Jamison City, Waller, Fairmount Spgs, Biggertown,
Lairdsville, Ricketts Glen State Park, Central, Benton, Picture
Rocks, and Stillwater.

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.

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.

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
central and north central Pennsylvania.

&&

LAT...LON 4119 7676 4133 7675 4133 7668 4131 7660
      4133 7664 4136 7629 4131 7631 4120 7632
      4114 7628 4113 7626 4114 7623 4112 7623
TIME...MOT...LOC 1627Z 271DEG 28KT 4125 7653

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Martin
Special weather statement, Jun 30, 12:31 PM EDT, 1 hour 43 minutes before
Special Weather Statement
National Weather Service State College PA
1231 PM EDT Sun Jun 30 2024

PAZ012-017>019-045-301700-
Northern Centre PA-Southern Clinton PA-Northern Clinton PA-
Clearfield PA-Southern Centre PA-
1231 PM EDT Sun Jun 30 2024

...STRONG THUNDERSTORMS WILL IMPACT SOUTHEASTERN CLEARFIELD...CENTRE
AND SOUTH CENTRAL CLINTON COUNTIES THROUGH 100 PM EDT...

At 1231 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 19 miles west of Lock Haven to 11 miles west of
Bellefonte to 11 miles north of Tyrone. Movement was east at 35 mph.

HAZARD...Wind gusts up to 40 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 is
         possible.

Locations impacted include...
State College, Lock Haven, Bellefonte, Park Forest Village,
Boalsburg, Pleasant Gap, Philipsburg, Lamar, Stormstown, Lemont,
Zion, Houserville, Mill Hall, Pine Grove Mills, Flemington, Centre
Hall, Osceola Mills, Milesburg, Chester Hill, and Houtzdale.

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.

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
central and north central Pennsylvania.

&&

LAT...LON 4115 7744 4090 7758 4074 7787 4082 7845
      4099 7819 4103 7802 4112 7798
TIME...MOT...LOC 1631Z 280DEG 30KT 4108 7782 4095 7798 4083 7830

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Bauco
Special weather statement, Jun 30, 1:00 PM EDT, 1 hour 14 minutes before
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Special weather statement, Jun 30, 2:00 PM EDT, 14 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 8:26 PM EDTSpecial Weather StatementCTPAdams34 min
Jun 30, 11:52 AM EDTSpecial Weather StatementCTPSullivan23 min
Jun 30, 12:08 PM EDTSpecial Weather StatementCTPCentre37 min
Jun 30, 12:27 PM EDTSpecial Weather StatementCTPSullivan33 min
Jun 30, 12:31 PM EDTSpecial Weather StatementCTPCentre29 min
Jun 30, 12:43 PM EDTSevere Thunderstorm WarningCTPColumbia17 min
Jun 30, 12:55 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Mifflin, Snyder, Union35 min
Jun 30, 1:00 PM EDTSpecial Weather StatementCTPCentre30 min
Jun 30, 1:07 PM EDTSevere Thunderstorm WarningCTPCentre, Juniata, Mifflin, Snyder, Union26 min
Jun 30, 1:30 PM EDTSevere Thunderstorm WarningCTPColumbia, Montour, Northumberland, Snyder, Union45 min
Jun 30, 2:00 PM EDTSpecial Weather StatementCTPNorthumberland15 min
Jun 30, 2:44 PM EDTSpecial Weather StatementCTPSchuylkill31 min
Jun 30, 2:47 PM EDTSevere Thunderstorm WarningCTPDauphin, Lancaster, Lebanon43 min
Jun 30, 3:22 PM EDTSevere Thunderstorm WarningCTPLancaster, Lebanon38 min
Jun 30, 4:12 PM EDTSpecial Weather StatementCTPYork18 min
Jun 30, 4:12 PM EDTSpecial Weather StatementCTPLancaster63 min
Jun 30, 4:31 PM EDTSevere Thunderstorm WarningCTPLancaster, York44 min
Jun 30, 4:55 PM EDTSpecial Weather StatementCTPLebanon20 min
Jun 30, 6:43 PM EDTSpecial Weather StatementCTPLancaster32 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.