Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 147, NWS State College, PA

August 6, 20247 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 6, 2024, 4:52 PM EDT for 7 counties in Pennsylvania. It was in force for 38 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: Aug 6, 2024, 4:52 PM EDT (20:52 UTC)
Expired: Aug 6, 2024, 5:30 PM EDT
In force: 38 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Bedford County, PA, Blair County, PA, Franklin County, PA, Huntingdon County, PA, Juniata County, PA, Mifflin County, PA, Perry County, PA

The radar

The State College radar (KCCX), 67 km from the middle of the area, began a volume at 20:55 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.

Issued	Product	Office	Lasted
Aug 6, 11:42 AM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.9 hours before the alert went out and 159 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: 527 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 1272 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 93 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 Aug 6, 4:22 PM EDT, 30 minutes earlier.

Area forecast discussion, Aug 6, 4:22 PM EDT, 30 minutes before

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Hazardous weather outlook, Aug 6, 4:20 PM EDT, 32 minutes before

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In the hours before

Special weather statement, Aug 6, 3:45 PM EDT, 1 hour 7 minutes before

Special Weather Statement
National Weather Service State College PA
345 PM EDT Tue Aug 6 2024

PAZ046-051>053-062030-
Columbia PA-Southern Lycoming PA-Northumberland PA-Montour PA-
345 PM EDT Tue Aug 6 2024

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN NORTHUMBERLAND...
NORTHERN MONTOUR...SOUTHEASTERN LYCOMING AND NORTHWESTERN COLUMBIA
COUNTIES THROUGH 430 PM EDT...

At 345 PM EDT, Doppler radar was tracking a strong thunderstorm 14
miles east of Montoursville, moving east at 20 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Muncy, Watsontown, Hughesville, Jerseytown, Rohrsburg, Iola, Eyers
Grove, Waller, Lairdsville, Central, Exchange, Fairmount Spgs,
Biggertown, Delaware Run, Millville, Benton, Turbotville, Picture
Rocks, McEwensville, and Washingtonville.

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 4120 7632 4102 7651 4107 7686 4108 7686
      4113 7689 4135 7673 4131 7661 4128 7645
      4128 7631
TIME...MOT...LOC 1945Z 281DEG 19KT 4120 7664

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Colbert

Special weather statement, Aug 6, 3:58 PM EDT, 54 minutes before

Special Weather Statement
National Weather Service State College PA
358 PM EDT Tue Aug 6 2024

PAZ025>028-062030-
Blair PA-Juniata PA-Huntingdon PA-Mifflin PA-
358 PM EDT Tue Aug 6 2024

...STRONG THUNDERSTORMS WILL IMPACT NORTHERN HUNTINGDON...MIFFLIN...
NORTHWESTERN JUNIATA AND NORTHEASTERN BLAIR COUNTIES THROUGH 430 PM
EDT...

At 358 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 12 miles north of Lewistown to near Altoona.
Movement was east 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 is
         possible.

Locations impacted include...
Altoona, Lewistown, Huntingdon, Tyrone, Mount Union, Bald Eagle,
Burnham, Bellwood, Belleville, Warriors Mark, Milroy, Highland Park,
Williamsburg, Tipton, Yeagertown, Mcalisterville, Strodes Mills,
Reedsville, Juniata Terrace, and Allensville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

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

&&

LAT...LON 4039 7835 4058 7842 4072 7821 4074 7811
      4069 7794 4074 7783 4072 7771 4085 7736
      4070 7735 4068 7719 4032 7798
TIME...MOT...LOC 1958Z 287DEG 22KT 4077 7762 4050 7822

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

Colbert

Local storm report, Aug 6, 3:59 PM EDT, 53 minutes before

Preliminary Local Storm Report
National Weather Service State College PA
359 PM EDT Tue Aug 6 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0345 PM     Tstm Wnd Dmg     2 SW Unionville         40.88N 77.91W
08/06/2024                   Centre             PA   Public

            Trees down and on wires blocking old Rt 220.

&&

GAD

Local storm report, Aug 6, 4:06 PM EDT, 46 minutes before

Preliminary Local Storm Report
National Weather Service State College PA
406 PM EDT Tue Aug 6 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0354 PM     Tstm Wnd Dmg     3 NE Boalsburg          40.81N 77.75W
08/06/2024                   Centre             PA   Amateur Radio

            Trees down.

&&

GAD

Special weather statement, Aug 6, 4:25 PM EDT, 27 minutes before

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Special weather statement, Aug 6, 4:42 PM EDT, 10 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
Aug 6, 12:30 AM EDT	Special Weather Statement	CTP	Lycoming	45 min
Aug 6, 1:28 PM EDT	Special Weather Statement	CTP	Bedford	32 min
Aug 6, 1:46 PM EDT	Special Weather Statement	CTP	Clearfield	44 min
Aug 6, 2:03 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	57 min
Aug 6, 2:35 PM EDT	Special Weather Statement	CTP	Lancaster	25 min
Aug 6, 2:39 PM EDT	Special Weather Statement	CTP	Clearfield	36 min
Aug 6, 2:44 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Clearfield	61 min
Aug 6, 2:49 PM EDT	Special Weather Statement	CTP	Cambria	26 min
Aug 6, 2:53 PM EDT	Special Weather Statement	CTP	Centre	37 min
Aug 6, 2:54 PM EDT	Flood Watch	CTP	Columbia, Dauphin, Lancaster, Lebanon, Schuylkill, York	13 hr
Aug 6, 3:04 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Huntingdon	41 min
Aug 6, 3:16 PM EDT	Areal Flood Advisory	CTP	Adams, Lancaster, York	119 min
Aug 6, 3:21 PM EDT	Special Weather Statement	CTP	Cambria	24 min
Aug 6, 3:24 PM EDT	Severe Thunderstorm Warning	CTP	Centre	66 min
Aug 6, 3:28 PM EDT	Special Weather Statement	CTP	Lancaster	32 min
Aug 6, 3:45 PM EDT	Special Weather Statement	CTP	Montour	45 min
Aug 6, 3:52 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	38 min
Aug 6, 3:58 PM EDT	Special Weather Statement	CTP	Blair, Huntingdon, Mifflin	32 min
Aug 6, 4:06 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Huntingdon	39 min
Aug 6, 4:07 PM EDT	Flash Flood Warning	CTP	Lancaster	2 hr
Aug 6, 4:16 PM EDT	Areal Flood Advisory	CTP	Blair, Centre, Huntingdon, Mifflin	74 min
Aug 6, 4:25 PM EDT	Special Weather Statement	CTP	Columbia	20 min
Aug 6, 4:33 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin, Perry, Snyder	57 min
Aug 6, 4:42 PM EDT	Special Weather Statement	CTP	Huntingdon, Juniata, Mifflin	48 min
Aug 6, 4:58 PM EDT	Special Weather Statement	CTP	Lebanon	32 min
Aug 6, 5:05 PM EDT	Severe Thunderstorm Warning	CTP	Lebanon	25 min
Aug 6, 5:18 PM EDT	Special Weather Statement	CTP	Fulton	12 min
Aug 6, 5:23 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Juniata, Lebanon, Northumberland, Perry, Schuylkill and 1 more	37 min
Aug 6, 5:28 PM EDT	Special Weather Statement	CTP	Schuylkill	32 min
Aug 6, 5:32 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Franklin, Fulton, Huntingdon, Juniata and 1 more	43 min
Aug 6, 5:56 PM EDT	Special Weather Statement	CTP	Lebanon, Schuylkill	34 min
Aug 6, 6:12 PM EDT	Special Weather Statement	CTP	Cumberland, Franklin, Fulton	33 min
Aug 6, 6:17 PM EDT	Special Weather Statement	CTP	Lebanon	28 min
Aug 6, 6:30 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, York	45 min
Aug 6, 7:14 PM EDT	Special Weather Statement	CTP	Adams	31 min
Aug 6, 7:32 PM EDT	Areal Flood Advisory	CTP	Lancaster, Lebanon	118 min
Aug 6, 7:39 PM EDT	Special Weather Statement	CTP	Cambria, Clearfield	51 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.