Alert archive / Arizona / Areal Flood Warnings in 2017

Areal Flood Warning 2, NWS Las Vegas, NV

July 25, 2017Mohave County, Arizona

NWS Las Vegas, NV issued this areal flood warning at Jul 25, 2017, 4:21 PM MST for Mohave County, Arizona. It was in force for 12 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
Jul 25, 2017, 4:21 PM MST (23:21 UTC)
Expired
Jul 26, 2017, 4:15 AM MST
In force
12 hr
Issued by
NWS Las Vegas, NV
Area
Storm-based polygon
Flood severity
None

County Mohave County, AZ

The radar

The Las Vegas radar (KESX), 102 km from the middle of the area, began a volume at 23:20 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

Las Vegas, NV (KVEF), launched 12:00Z, 11.4 hours before the alert went out and 177 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-pSkew-T log-p diagram, Las Vegas, NV at 12:00Z on 2017-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 916 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Las Vegas, NV at 12:00Z on 2017-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 149 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
916 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
897 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
149 m²/s²
0-3 km storm-relative helicity
167 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.2

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 Las Vegas, NV wrote its last area forecast discussion before this areal flood warning went out at Jul 25, 1:55 PM MST, 2 hours 26 minutes earlier.

Area forecast discussion, Jul 25, 1:55 PM MST, 2 hours 26 minutes before
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In the hours before

Local storm report, Jul 25, 11:23 AM MST, 4 hours 58 minutes before
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<html lang="en">
<head>
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  <title>Service Notice</title>
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</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>
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Local storm report, Jul 25, 11:43 AM MST, 4 hours 38 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>
Local storm report, Jul 25, 1:17 PM MST, 3 hours 4 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>
Local storm report, Jul 25, 2:18 PM MST, 2 hours 3 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>
Local storm report, Jul 25, 3:43 PM MST, 38 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 Las Vegas, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 24, 5:39 PM MSTAreal Flood AdvisoryVEFLincoln3 hr
Jul 24, 7:13 PM MSTFlash Flood WarningVEFLincoln3 hr
Jul 24, 9:34 PM MSTFlash Flood WarningVEFClark3 hr
Jul 24, 11:59 PM MSTFlash Flood WatchVEFClark, Nye20 hr
Jul 25, 12:43 AM MSTAreal Flood AdvisoryVEFLincoln4 hr
Jul 25, 2:15 AM MSTFlash Flood WarningVEFClark3 hr
Jul 25, 4:54 AM MSTFlash Flood WarningVEFClark6 hr
Jul 25, 5:42 AM MSTFlash Flood WarningVEFLincoln10 hr
Jul 25, 6:55 AM MSTFlash Flood WarningVEFClark5 hr
Jul 25, 8:06 AM MSTFlash Flood WarningVEFClark8 hr
Jul 25, 10:28 AM MSTAreal Flood AdvisoryVEFClark3 hr
Jul 25, 10:47 AM MSTAreal Flood AdvisoryVEFClark6 hr
Jul 25, 11:06 AM MSTFlash Flood WarningVEFClark6 hr
Jul 25, 1:57 PM MSTAreal Flood AdvisoryVEFEsmeralda4 hr
Jul 25, 2:57 PM MSTFlash Flood WarningVEFLincoln, Nye3 hr
Jul 25, 4:23 PM MSTFlash Flood WarningVEFLincoln, Nye3 hr
Jul 24, 6:30 PM MSTFlash Flood WarningVEFSan Bernardino3 hr
Jul 24, 6:54 PM MSTFlash Flood WarningVEFSan Bernardino3 hr
Jul 24, 7:40 PM MSTFlash Flood WarningVEFSan Bernardino2 hr
Jul 25, 11:39 AM MSTFlash Flood WarningVEFInyo3 hr
Jul 25, 1:28 PM MSTFlash Flood WarningVEFSan Bernardino3 hr
Jul 25, 4:07 PM MSTFlash Flood WarningVEFSan Bernardino3 hr
Jul 24, 6:14 PM MSTFlash Flood WarningVEFMohave3 hr
Jul 24, 7:30 PM MSTFlash Flood WarningVEFMohave3 hr
Jul 24, 8:40 PM MSTFlash Flood WarningVEFMohave3 hr

Nearby

Areal Flood Warnings in Arizona, 2017Every 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.