Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 225, NWS State College, PA

August 2, 2019Clearfield County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 2, 2019, 11:17 AM EDT for Clearfield County, Pennsylvania. It was in force for 58 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 2, 2019, 11:17 AM EDT (15:17 UTC)
Expired
Aug 2, 2019, 12:15 PM EDT
In force
58 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Clearfield County, PA

The radar

The State College radar (KCCX), 40 km from the middle of the area, began a volume at 15:19 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

Pittsburgh, PA (KPIT), launched 12:00Z, 3.3 hours before the alert went out and 152 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, Pittsburgh, PA at 12:00Z on 2019-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 36 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, Pittsburgh, PA at 12:00Z on 2019-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.1939Sfc1 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
36 J/kg
Mixed-layer CIN
-147 J/kg
Mixed-layer LCL
1497 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
26 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 Aug 2, 10:44 AM EDT, 33 minutes earlier.

Area forecast discussion, Aug 2, 10:44 AM EDT, 33 minutes before
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Hazardous weather outlook, Aug 2, 4:30 AM EDT, 6 hours 47 minutes before
Hazardous Weather Outlook
National Weather Service State College PA
430 AM EDT Fri Aug 2 2019

PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053-
056>059-063>066-030830-
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin-
Juniata-Somerset-Bedford-Fulton-Franklin-Tioga-Northern Lycoming-
Sullivan-Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-
Adams-York-Lancaster-
430 AM EDT Fri Aug 2 2019

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Aug 2, 11:00 AM EDT, 17 minutes before
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 11:00 AM EDTSpecial Weather StatementCTPClearfield60 min
Aug 2, 11:58 AM EDTSpecial Weather StatementCTPClearfield62 min
Aug 2, 12:22 PM EDTAreal Flood AdvisoryCTPClearfield3 hr
Aug 2, 12:25 PM EDTSpecial Weather StatementCTPCentre35 min
Aug 2, 12:42 PM EDTSpecial Weather StatementCTPCumberland48 min
Aug 2, 1:12 PM EDTSpecial Weather StatementCTPUnion33 min
Aug 2, 1:27 PM EDTSevere Thunderstorm WarningCTPClinton, Lycoming33 min
Aug 2, 1:48 PM EDTAreal Flood AdvisoryCTPBlair, Cambria3 hr
Aug 2, 1:53 PM EDTSpecial Weather StatementCTPClinton37 min
Aug 2, 2:01 PM EDTSpecial Weather StatementCTPBlair59 min
Aug 2, 2:28 PM EDTAreal Flood AdvisoryCTPBedford3 hr
Aug 2, 2:45 PM EDTSpecial Weather StatementCTPBlair45 min
Aug 2, 3:11 PM EDTAreal Flood AdvisoryCTPBlair, Cambria3 hr
Aug 2, 3:24 PM EDTFlash Flood WarningCTPBlair3 hr
Aug 2, 3:45 PM EDTAreal Flood AdvisoryCTPCentre, Mifflin, Snyder, Union3 hr
Aug 2, 4:02 PM EDTAreal Flood AdvisoryCTPColumbia, Northumberland, Schuylkill3 hr
Aug 2, 4:50 PM EDTAreal Flood AdvisoryCTPMontour, Northumberland, Snyder, Union3 hr
Aug 2, 5:01 PM EDTSevere Thunderstorm WarningCTPColumbia, Montour, Northumberland, Schuylkill59 min
Aug 2, 5:24 PM EDTSpecial Weather StatementCTPSchuylkill36 min
Aug 2, 5:27 PM EDTFlash Flood WarningCTPColumbia, Montour, Northumberland3 hr
Aug 2, 5:42 PM EDTSpecial Weather StatementCTPColumbia, Montour33 min
Aug 2, 5:52 PM EDTSpecial Weather StatementCTPMontour23 min
Aug 2, 5:57 PM EDTSpecial Weather StatementCTPSchuylkill33 min
Aug 2, 6:03 PM EDTAreal Flood AdvisoryCTPSchuylkill3 hr
Aug 2, 7:11 PM EDTSpecial Weather StatementCTPLebanon34 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2019Every 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.