Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 166, NWS State College, PA

August 29, 2024Juniata County, Perry County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 29, 2024, 9:42 PM EDT for Juniata County, Perry County, Pennsylvania. It was in force for 48 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 29, 2024, 9:42 PM EDT (01:42 UTC)
Expired: Aug 29, 2024, 10:30 PM EDT
In force: 48 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Juniata County, PA, Perry County, PA

The radar

The State College radar (KCCX), 76 km from the middle of the area, began a volume at 01:42 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 29, 3:54 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 1.7 hours before the alert went out and 234 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: 1239 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1142 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 29, 7:41 PM EDT, 2 hours 1 minute earlier.

Area forecast discussion, Aug 29, 7:41 PM EDT, 2 hours 1 minute before

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Hazardous weather outlook, Aug 29, 8:53 PM EDT, 49 minutes before

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In the hours before

Local storm report, Aug 29, 7:51 PM EDT, 1 hour 51 minutes before

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Local storm report, Aug 29, 8:16 PM EDT, 1 hour 26 minutes before

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Local storm report, Aug 29, 8:52 PM EDT, 50 minutes before

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Local storm report, Aug 29, 8:57 PM EDT, 45 minutes before

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Special weather statement, Aug 29, 9:12 PM EDT, 30 minutes before

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Local storm report, Aug 29, 9:24 PM EDT, 18 minutes before

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      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 29, 8:05 PM EDT	Areal Flood Advisory	CTP	Sullivan	3 hr
Aug 29, 8:09 PM EDT	Areal Flood Advisory	CTP	Centre, Clinton	3 hr
Aug 29, 8:28 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Mifflin, Snyder, Union	47 min
Aug 29, 9:12 PM EDT	Special Weather Statement	CTP	Juniata	33 min
Aug 29, 10:12 PM EDT	Areal Flood Advisory	CTP	Centre, Huntingdon, Juniata, Mifflin	3 hr
Aug 29, 10:27 PM EDT	Flash Flood Warning	CTP	Juniata, Mifflin	4 hr
Aug 29, 10:28 PM EDT	Special Weather Statement	CTP	Perry	32 min
Aug 29, 10:48 PM EDT	Flash Flood Warning	CTP	Juniata, Perry	3 hr
Aug 30, 12:58 AM EDT	Areal Flood Advisory	CTP	Juniata, Perry	92 min
Aug 30, 1:56 AM EDT	Areal Flood Warning	CTP	Juniata, Mifflin, Perry	64 min
Aug 30, 7:43 PM EDT	Special Weather Statement	CTP	Warren	17 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.