Alert archive / Idaho / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 39, NWS Pocatello, ID

August 23, 20264 counties in Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at Aug 23, 2026, 3:20 PM MDT for 4 counties in Idaho. 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: Aug 23, 2026, 3:20 PM MDT (21:20 UTC)
Expired: Aug 23, 2026, 4:00 PM MDT
In force: 40 min
Issued by: NWS Pocatello, ID
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

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 21:20 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, 9.3 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-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: 275 J/kg
Mixed-layer CIN: -256 J/kg
Mixed-layer LCL: 1941 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 99 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 Aug 23, 2:00 PM MDT, 1 hour 20 minutes earlier.

Area forecast discussion, Aug 23, 2:00 PM MDT, 1 hour 20 minutes before

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In the hours before

Special weather statement, Aug 23, 2:54 PM MDT, 26 minutes before

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  <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>
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      <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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        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.

Issued	Product	Office	Counties	Lasted
Aug 22, 6:17 PM MDT	Severe Thunderstorm Warning Considerable damage threat	PIH	Bingham, Blaine, Bonneville, Butte, Jefferson, Power	43 min
Aug 22, 6:38 PM MDT	Special Weather Statement	PIH	Bingham	52 min
Aug 22, 7:00 PM MDT	Special Weather Statement	PIH	Bonneville, Madison	45 min
Aug 22, 7:55 PM MDT	Special Weather Statement	PIH	Madison	35 min
Aug 22, 8:07 PM MDT	Flash Flood Warning Considerable damage threat	PIH	Jefferson, Madison	3 hr
Aug 22, 8:10 PM MDT	Special Weather Statement	PIH	Fremont	35 min
Aug 23, 2:54 PM MDT	Special Weather Statement	PIH	Power	51 min
Aug 23, 3:09 PM MDT	Severe Thunderstorm Warning	PIH	Bannock, Power	36 min
Aug 23, 3:43 PM MDT	Severe Thunderstorm Warning	PIH	Bannock, Oneida, Power	47 min
Aug 23, 3:54 PM MDT	Severe Thunderstorm Warning	PIH	Cassia, Power	30 min
Aug 23, 3:57 PM MDT	Severe Thunderstorm Warning	PIH	Caribou	48 min
Aug 23, 5:05 PM MDT	Severe Thunderstorm Warning	PIH	Cassia, Oneida	40 min
Aug 23, 5:47 PM MDT	Special Weather Statement	PIH	Bear Lake	28 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2026 Every severe thunderstorm warning in 2026

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.