Alert archive / Idaho / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 50, NWS Pocatello, ID

September 18, 20144 counties in Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at Sep 18, 2014, 1:24 PM MDT for 4 counties in Idaho. It was in force for 36 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
Sep 18, 2014, 1:24 PM MDT (19:24 UTC)
Expired
Sep 18, 2014, 2:00 PM MDT
In force
36 min
Issued by
NWS Pocatello, ID
Area
Storm-based polygon

Counties Bannock County, ID, Bingham County, ID, Bonneville County, ID, Caribou County, ID

The radar

The Pocatello radar (KSFX), 61 km from the middle of the area, began a volume at 19:24 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

Salt Lake City I, UT (KSLC), launched 12:00Z, 7.4 hours before the alert went out and 248 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, Salt Lake City I, UT at 12:00Z on 2014-09-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 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, Salt Lake City I, UT at 12:00Z on 2014-09-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.193958Sfc1 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
17 J/kg
Mixed-layer CIN
-248 J/kg
Mixed-layer LCL
2714 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
50 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 Pocatello, ID wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 18, 8:07 AM MDT, 5 hours 17 minutes earlier.

Area forecast discussion, Sep 18, 8:07 AM MDT, 5 hours 17 minutes before
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In the hours before

Special weather statement, Sep 18, 1:07 PM MDT, 17 minutes before
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<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <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 Pocatello, ID issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 18, 1:07 PM MDTSpecial Weather StatementPIHCaribou53 min
Sep 18, 1:34 PM MDTSpecial Weather StatementPIHButte56 min
Sep 18, 1:54 PM MDTSpecial Weather StatementPIHCassia66 min
Sep 18, 1:56 PM MDTSevere Thunderstorm WarningPIHBingham, Bonneville, Caribou49 min
Sep 18, 2:17 PM MDTSpecial Weather StatementPIHJefferson58 min
Sep 18, 2:17 PM MDTSevere Thunderstorm WarningPIHCassia, Oneida, Power43 min
Sep 18, 2:20 PM MDTSpecial Weather StatementPIHBonneville55 min
Sep 18, 2:25 PM MDTSpecial Weather StatementPIHTeton50 min
Sep 18, 2:31 PM MDTSpecial Weather StatementPIHCaribou59 min
Sep 18, 2:42 PM MDTTornado WarningPIHCassia, Oneida, Power48 min
Sep 18, 3:26 PM MDTSevere Thunderstorm WarningPIHCassia, Oneida, Power41 min
Sep 18, 3:38 PM MDTSevere Thunderstorm WarningPIHBannock, Oneida, Power52 min
Sep 18, 4:11 PM MDTSpecial Weather StatementPIHOneida49 min
Sep 18, 4:15 PM MDTSevere Thunderstorm WarningPIHBannock, Caribou45 min
Sep 18, 4:27 PM MDTSpecial Weather StatementPIHBonneville48 min
Sep 18, 4:35 PM MDTSevere Thunderstorm WarningPIHBannock, Franklin, Oneida, Power40 min
Sep 18, 5:13 PM MDTSevere Thunderstorm WarningPIHBannock, Caribou, Oneida19 min
Sep 18, 5:43 PM MDTSpecial Weather StatementPIHOneida47 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2014Every severe thunderstorm warning in 2014

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.