Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 213, NWS State College, PA

December 1, 20104 counties in Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Dec 1, 2010, 6:29 AM EST for 4 counties in 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
Dec 1, 2010, 6:29 AM EST (11:29 UTC)
Expired
Dec 1, 2010, 7:15 AM EST
In force
46 min
Issued by
NWS State College, PA
Area
Storm-based polygon

Counties Juniata County, PA, Northumberland County, PA, Snyder County, PA, Union County, PA

The radar

The State College radar (KCCX), 81 km from the middle of the area, began a volume at 11:31 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 00:00Z, 11.5 hours before the alert went out and 205 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, Washington/Dulle, VA at 00:00Z on 2010-12-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Washington/Dulle, VA at 00:00Z on 2010-12-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 416 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
671 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
416 m²/s²
0-3 km storm-relative helicity
505 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 Dec 1, 5:24 AM EST, 1 hour 5 minutes earlier.

Area forecast discussion, Dec 1, 5:24 AM EST, 1 hour 5 minutes before
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Hazardous weather outlook, Dec 1, 5:33 AM EST, 56 minutes before
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In the hours before

Local storm report, Dec 1, 4:53 AM EST, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
453 AM EST WED DEC 01 2010

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

0445 AM     FLOOD            2 WSW BRADFORD          41.94N 78.67W
12/01/2010                   MCKEAN             PA   LAW ENFORCEMENT

            HAD TO EVACUATE DORMS AT UNIVERSITY OF PITTSBURGH AT
            BRADFORD DUE TO FLOODING. MULTIPLE ROAD CLOSURES ACROSS
            THE SOUTHEASTERN PART OF THE COUNTY.

&&

CERU
Local storm report, Dec 1, 6:22 AM EST, 7 minutes before
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <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>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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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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The office that day

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

IssuedProductOfficeCountiesLasted
Nov 30, 7:36 PM ESTRiver Flood WarningCTPBlair, Huntingdon28 hr
Nov 30, 8:54 PM ESTAreal Flood AdvisoryCTPBedford, Blair, Cambria, Cameron, Centre, Clearfield and 7 more8 hr
Nov 30, 9:36 PM ESTRiver Flood WarningCTPElk24 hr
Nov 30, 10:06 PM ESTRiver Flood WarningCTPBlair, Huntingdon35 hr
Nov 30, 10:24 PM ESTRiver Flood WarningCTPClinton, Lycoming38 hr
Nov 30, 10:24 PM ESTRiver Flood WarningCTPCentre, Snyder, Union38 hr
Nov 30, 11:36 PM ESTAreal Flood WarningCTPCameron, Clearfield, Clinton, Elk, McKean, Potter6 hr
Dec 1, 1:37 AM ESTAreal Flood WarningCTPBlair, Centre6 hr
Dec 1, 3:14 AM ESTAreal Flood WarningCTPBedford, Blair, Centre, Clinton, Fulton, Huntingdon6 hr
Dec 1, 4:20 AM ESTRiver Flood WarningCTPElk18 hr
Dec 1, 4:52 AM ESTAreal Flood WarningCTPCameron, Clearfield, Clinton, Elk, McKean, Potter6 hr
Dec 1, 5:01 AM ESTAreal Flood AdvisoryCTPAdams, Columbia, Cumberland, Franklin, Juniata, Lancaster and 7 more6 hr
Dec 1, 5:53 AM ESTAreal Flood AdvisoryCTPYork6 hr
Dec 1, 6:53 AM ESTSpecial Weather StatementCTPDauphin, Lycoming, Montour, Northumberland, Snyder, Union52 min
Dec 1, 7:48 AM ESTSpecial Weather StatementCTPAdams, Cumberland, York72 min
Dec 1, 8:47 AM ESTAreal Flood WarningCTPBedford, Blair, Centre, Clearfield, Clinton, Franklin and 10 more6 hr
Dec 1, 9:19 AM ESTRiver Flood WarningCTPClinton30 hr
Dec 1, 9:52 AM ESTWinter Weather AdvisoryCTPCambria, Cameron, Centre, Clearfield, Clinton, Elk and 6 more10 hr
Dec 1, 9:59 AM ESTSpecial Weather StatementCTPColumbia, Lancaster, Lebanon, Schuylkill31 min
Dec 1, 10:28 AM ESTRiver Flood WarningCTPCentre, Clinton15 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTPLycoming36 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTPLycoming47 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTPLycoming, Northumberland, Union45 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTPNorthumberland, Union42 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTPNorthumberland, Union47 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTPNorthumberland, Union47 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTPHuntingdon13 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTPHuntingdon23 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTPWarren5 hr
Dec 1, 10:28 AM ESTRiver Flood WarningCTPMcKean23 hr
Dec 1, 11:36 AM ESTAreal Flood AdvisoryCTPAdams, Columbia, Cumberland, Dauphin, Franklin, Lancaster and 6 more4 hr
Dec 1, 1:52 PM ESTAreal Flood WarningCTPSchuylkill9 hr
Dec 1, 2:30 PM ESTAreal Flood WarningCTPBedford, Blair, Cameron, Centre, Clinton, Elk and 12 more10 hr
Dec 1, 3:55 PM ESTRiver Flood WarningCTPClinton, Lycoming19 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2010Every severe thunderstorm warning in 2010

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.