Alert archive / Idaho / Red Flag Warnings in 2017

Red Flag Warning 6, NWS Boise, ID

August 9, 20178 counties in Idaho

NWS Boise, ID issued this red flag warning at Aug 9, 2017, 8:13 AM MDT for 8 counties in Idaho. It took effect at Aug 9, 2017, 12:00 PM MDT. It was in force for 9 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: Aug 9, 2017, 8:13 AM MDT (14:13 UTC)
In effect from: Aug 9, 2017, 12:00 PM MDT
Expired: Aug 9, 2017, 9:03 PM MDT
In force: 9 hr
Issued by: NWS Boise, ID

Counties Boise County, ID, Camas County, ID, Elmore County, ID, Gooding County, ID, Jerome County, ID, Lincoln County, ID, Owyhee County, ID, Twin Falls County, ID

The radar

The Boise radar (KCBX), 111 km from the middle of the area, began a volume at 14:15 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, 2.2 hours before the alert went out and 112 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: 26 J/kg
Mixed-layer CIN: -369 J/kg
Mixed-layer LCL: 2501 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 82 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 red flag 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 red flag warning went out at Aug 9, 3:02 AM MDT, 5 hours 11 minutes earlier.

Area forecast discussion, Aug 9, 3:02 AM MDT, 5 hours 11 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>

Nearby

Red Flag Warnings in Idaho, 2017 Red Flag Warnings in Oregon, 2017 Every red flag warning in 2017

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.