Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 129, NWS State College, PA

July 16, 2024Lancaster County, York County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 16, 2024, 8:44 PM EDT for Lancaster County, York County, Pennsylvania. It was in force for 46 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 16, 2024, 8:44 PM EDT (00:44 UTC)
Expired: Jul 16, 2024, 9:30 PM EDT
In force: 46 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lancaster County, PA, York County, PA

The radar

The Sterling radar (KLWX), 141 km from the middle of the area, began a volume at 00:47 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
Jul 16, 3:36 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.7 hours before the alert went out and 247 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: 2487 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1346 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 9.7

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 16, 8:26 PM EDT, 18 minutes earlier.

Area forecast discussion, Jul 16, 8:26 PM EDT, 18 minutes before

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Hazardous weather outlook, Jul 16, 8:08 PM EDT, 36 minutes before

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In the hours before

Local storm report, Jul 16, 8:06 PM EDT, 38 minutes before

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Local storm report, Jul 16, 8:21 PM EDT, 23 minutes before

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Local storm report, Jul 16, 8:25 PM EDT, 19 minutes before

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Local storm report, Jul 16, 8:28 PM EDT, 16 minutes before

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Local storm report, Jul 16, 8:41 PM EDT, 3 minutes before

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Local storm report, Jul 16, 8:44 PM EDT, 0 minutes before

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      <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
Jul 16, 8:20 PM EDT	Areal Flood Advisory	CTP	York	100 min
Jul 16, 9:57 PM EDT	Special Weather Statement	CTP	Lancaster	33 min
Jul 17, 1:48 PM EDT	Special Weather Statement	CTP	Lancaster	27 min
Jul 17, 2:11 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	34 min
Jul 17, 2:59 PM EDT	Areal Flood Advisory	CTP	Elk	91 min
Jul 17, 4:12 PM EDT	Special Weather Statement	CTP	Sullivan	33 min
Jul 17, 4:39 PM EDT	Special Weather Statement	CTP	Columbia	36 min
Jul 17, 4:46 PM EDT	Severe Thunderstorm Warning	CTP	Columbia	24 min
Jul 17, 6:09 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	26 min
Jul 17, 6:13 PM EDT	Areal Flood Advisory	CTP	York	2 hr
Jul 17, 6:18 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, York	42 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.