Alert archive / Nevada / Areal Flood Warnings in 2017

Areal Flood Warning 13, NWS Reno, NV

February 9, 2017Douglas County, Storey County, Washoe County, Nevada; 4 counties in California

NWS Reno, NV issued this areal flood warning at Feb 9, 2017, 12:27 PM PST for Douglas County, Storey County, Washoe County, Nevada; 4 counties in California. It was in force for 57 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 9, 2017, 12:27 PM PST (20:27 UTC)
Expired: Feb 11, 2017, 9:15 PM PST
In force: 57 hr
Issued by: NWS Reno, NV
Area: Storm-based polygon
Flood severity: None

Counties Alpine County, CA, El Dorado County, CA, Nevada County, CA, Placer County, CA, Douglas County, NV, Storey County, NV, Washoe County, NV

The radar

The Reno radar (KRGX), 78 km from the middle of the area, began a volume at 20:28 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

Oakland, CA (KOAK), launched 12:00Z, 8.5 hours before the alert went out and 250 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: 2 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 838 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 353 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 areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Reno, NV wrote its last area forecast discussion before this areal flood warning went out at Feb 9, 10:37 AM PST, 1 hour 50 minutes earlier.

Area forecast discussion, Feb 9, 10:37 AM PST, 1 hour 50 minutes before

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In the hours before

Local storm report, Feb 9, 7:31 AM PST, 4 hours 56 minutes before

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<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.
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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 Reno, NV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 9, 1:46 AM PST	Lake Wind Advisory	REV	Douglas, Washoe	8 hr
Feb 9, 9:54 AM PST	Areal Flood Warning	REV	Lassen, Plumas, Sierra	12 hr

Nearby

Areal Flood Warnings in Nevada, 2017 Areal Flood Warnings in California, 2017 Every areal flood 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.