Alert archive / Idaho / Winter Storm Warnings in 2018

Winter Storm Warning 3, NWS Boise, ID

February 24, 20187 counties in Idaho

NWS Boise, ID issued this winter storm warning at Feb 24, 2018, 9:01 PM MST for 7 counties in Idaho. It took effect at Feb 25, 2018, 5:00 AM MST. It was in force for 28 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 24, 2018, 9:01 PM MST (04:01 UTC)
In effect from: Feb 25, 2018, 5:00 AM MST
Expired: Feb 26, 2018, 9:27 AM MST
In force: 28 hr
Issued by: NWS Boise, ID

Counties Adams County, ID, Boise County, ID, Camas County, ID, Elmore County, ID, Gem County, ID, Valley County, ID, Washington County, ID

The radar

The Boise radar (KCBX), 77 km from the middle of the area, began a volume at 04:02 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

Spokane, WA (KOTX), launched 00:00Z, 4.0 hours before the alert went out and 398 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 754 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 63 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 winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boise, ID wrote its last area forecast discussion before this winter storm warning went out at Feb 24, 3:08 PM MST, 5 hours 53 minutes earlier.

Area forecast discussion, Feb 24, 3:08 PM MST, 5 hours 53 minutes before

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In the hours before

Local storm report, Feb 24, 4:30 PM MST, 4 hours 31 minutes before

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Local storm report, Feb 24, 4:47 PM MST, 4 hours 14 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 Boise, ID issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 24, 9:01 PM MST	Winter Weather Advisory	BOI	Ada, Camas, Elmore, Gooding, Jerome, Owyhee and 1 more	41 hr

Nearby

Winter Storm Warnings in Idaho, 2018 Every winter storm warning in 2018

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.