Alert archive / California / Winter Weather Advisories in 2011

Winter Weather Advisory 13, NWS Las Vegas, NV

April 7, 2011Inyo County, California; Mohave County, Arizona

NWS Las Vegas, NV issued this winter weather advisory at Apr 7, 2011, 2:47 PM PDT for Inyo County, California; Mohave County, Arizona. It took effect at Apr 8, 2011, 5:00 AM PDT. It was in force for 28 hr.

The area

The counties it named.

The facts

Issued: Apr 7, 2011, 2:47 PM PDT (21:47 UTC)
In effect from: Apr 8, 2011, 5:00 AM PDT
Expired: Apr 9, 2011, 9:03 AM PDT
In force: 28 hr
Issued by: NWS Las Vegas, NV

Counties Mohave County, AZ, Inyo County, CA

The radar

The Las Vegas radar (KESX), 77 km from the middle of the area, began a volume at 21:51 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

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 9.8 hours before the alert went out and 355 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: 8 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 703 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 243 m²/s²
0-3 km storm-relative helicity: 213 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 weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Las Vegas, NV wrote its last area forecast discussion before this winter weather advisory went out at Apr 7, 10:05 AM PDT, 4 hours 42 minutes earlier.

Area forecast discussion, Apr 7, 10:05 AM PDT, 4 hours 42 minutes before

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Hazardous weather outlook, Apr 7, 5:18 AM PDT, 9 hours 29 minutes before

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In the hours before

Local storm report, Apr 7, 11:52 AM PDT, 2 hours 55 minutes before

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Local storm report, Apr 7, 12:20 PM PDT, 2 hours 27 minutes before

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        Please try again in a few minutes.
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      <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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Local storm report, Apr 7, 1:03 PM PDT, 1 hour 44 minutes before

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      <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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Local storm report, Apr 7, 1:21 PM PDT, 1 hour 26 minutes before

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      <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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Local storm report, Apr 7, 1:38 PM PDT, 1 hour 9 minutes before

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<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>
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Local storm report, Apr 7, 2:03 PM PDT, 44 minutes before

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<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 Las Vegas, NV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 7, 6:06 AM PDT	High Wind Warning	VEF	Clark, Esmeralda, Nye	17 hr

Nearby

Winter Weather Advisories in California, 2011 Winter Weather Advisories in Arizona, 2011 Every winter weather advisory 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.