Alert archive / Idaho / Special Weather Statements in 2011

Special Weather Statement, NWS Boise, ID

August 4, 2011Ada County, Idaho

NWS Boise, ID issued this special weather statement at Aug 4, 2011, 9:49 AM MDT for Ada County, Idaho. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 4, 2011, 9:49 AM MDT (15:49 UTC)
Expired: Aug 4, 2011, 10:30 AM MDT
In force: 41 min
Issued by: NWS Boise, ID

County Ada County, ID

The radar

The Boise radar (KCBX), 26 km from the middle of the area, began a volume at 15:50 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

Boise Airport, ID (KBOI), launched 12:00Z, 3.8 hours before the alert went out and 36 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: 3137 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 3, 2:37 PM MDT, 19 hours 12 minutes earlier.

Area forecast discussion, Aug 3, 2:37 PM MDT, 19 hours 12 minutes before

<!doctype html>
<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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

Everything else NWS Boise, ID issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 4, 8:20 AM MDT	Special Weather Statement	BOI	Owyhee	55 min
Aug 4, 11:05 AM MDT	Special Weather Statement	BOI	Ada	40 min
Aug 4, 2:27 PM MDT	Special Weather Statement	BOI	Twin Falls	48 min
Aug 4, 3:12 PM MDT	Special Weather Statement	BOI	Twin Falls	48 min
Aug 4, 4:20 PM MDT	Special Weather Statement	BOI	Jerome	25 min
Aug 4, 4:41 PM MDT	Special Weather Statement	BOI		49 min
Aug 4, 5:15 PM MDT	Special Weather Statement	BOI	Boise	30 min
Aug 4, 5:19 PM MDT	Special Weather Statement	BOI	Twin Falls	26 min
Aug 4, 5:28 PM MDT	Severe Thunderstorm Warning	BOI	Owyhee, Twin Falls	32 min
Aug 4, 5:46 PM MDT	Special Weather Statement	BOI	Boise	59 min

Nearby

Special Weather Statements in Idaho, 2011 Every special weather statement in 2011

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.