Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 221, NWS State College, PA

July 30, 2019Lancaster County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 30, 2019, 7:17 PM EDT for Lancaster County, Pennsylvania. It was in force for 40 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 30, 2019, 7:17 PM EDT (23:17 UTC)
Expired: Jul 30, 2019, 7:57 PM EDT
In force: 40 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Lancaster County, PA

The radar

The Dover AFB radar (KDOX), 152 km from the middle of the area, began a volume at 23:19 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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.3 hours before the alert went out and 157 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: 218 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1525 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 30, 2:40 PM EDT, 4 hours 37 minutes earlier.

Area forecast discussion, Jul 30, 2:40 PM EDT, 4 hours 37 minutes before

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Hazardous weather outlook, Jul 30, 1:28 PM EDT, 5 hours 49 minutes before

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In the hours before

Local storm report, Jul 30, 4:26 PM EDT, 2 hours 51 minutes before

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Special weather statement, Jul 30, 4:47 PM EDT, 2 hours 30 minutes before

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Special weather statement, Jul 30, 5:43 PM EDT, 1 hour 34 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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Special weather statement, Jul 30, 6:26 PM EDT, 51 minutes before

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        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Jul 30, 6:54 PM EDT, 23 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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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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Local storm report, Jul 30, 7:11 PM EDT, 6 minutes before

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      <p id="message1">
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      </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
Jul 30, 12:34 PM EDT	Special Weather Statement	CTP	Cambria	41 min
Jul 30, 12:56 PM EDT	Special Weather Statement	CTP	Somerset	49 min
Jul 30, 1:11 PM EDT	Special Weather Statement	CTP	Mifflin	34 min
Jul 30, 1:33 PM EDT	Special Weather Statement	CTP	Bedford	42 min
Jul 30, 1:36 PM EDT	Special Weather Statement	CTP	Clearfield	24 min
Jul 30, 1:37 PM EDT	Special Weather Statement	CTP	Huntingdon	38 min
Jul 30, 1:39 PM EDT	Special Weather Statement	CTP	Sullivan	36 min
Jul 30, 1:52 PM EDT	Special Weather Statement	CTP	Lycoming	38 min
Jul 30, 1:53 PM EDT	Severe Thunderstorm Warning	CTP	Clearfield	39 min
Jul 30, 2:03 PM EDT	Special Weather Statement	CTP	Huntingdon	42 min
Jul 30, 2:15 PM EDT	Special Weather Statement	CTP	Centre	45 min
Jul 30, 2:43 PM EDT	Special Weather Statement	CTP	Huntingdon, Juniata, Mifflin	47 min
Jul 30, 2:53 PM EDT	Areal Flood Advisory	CTP	Lycoming, Sullivan	3 hr
Jul 30, 2:56 PM EDT	Special Weather Statement	CTP	Clinton	49 min
Jul 30, 3:01 PM EDT	Special Weather Statement	CTP	Union	44 min
Jul 30, 3:28 PM EDT	Special Weather Statement	CTP	Snyder	32 min
Jul 30, 3:32 PM EDT	Special Weather Statement	CTP	Lycoming	28 min
Jul 30, 3:38 PM EDT	Severe Thunderstorm Warning	CTP	Snyder	52 min
Jul 30, 3:46 PM EDT	Areal Flood Advisory	CTP	Snyder, Union	3 hr
Jul 30, 3:54 PM EDT	Severe Thunderstorm Warning	CTP	Northumberland	81 min
Jul 30, 3:58 PM EDT	Special Weather Statement	CTP	Dauphin	47 min
Jul 30, 4:13 PM EDT	Special Weather Statement	CTP	Sullivan	47 min
Jul 30, 4:47 PM EDT	Special Weather Statement	CTP	Columbia	28 min
Jul 30, 5:43 PM EDT	Special Weather Statement	CTP	York	47 min
Jul 30, 6:26 PM EDT	Special Weather Statement	CTP	Berks	19 min
Jul 30, 6:54 PM EDT	Special Weather Statement	CTP	Lancaster	51 min
Jul 30, 6:58 PM EDT	Severe Thunderstorm Warning	CTP	York	47 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2019 Every severe thunderstorm warning in 2019

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.