Alert archive / Nevada / Areal Flood Advisories in 2012

Areal Flood Advisory 113, NWS Las Vegas, NV

July 16, 2012Clark County, Nevada

NWS Las Vegas, NV issued this areal flood advisory at Jul 16, 2012, 4:36 PM PDT for Clark County, Nevada. It was in force for 68 min.

The area

The counties it named.

The facts

Issued: Jul 16, 2012, 4:36 PM PDT (23:36 UTC)
Expired: Jul 16, 2012, 5:44 PM PDT
In force: 68 min
Issued by: NWS Las Vegas, NV
Area: Storm-based polygon

County Clark County, NV

The radar

The Las Vegas radar (KESX), 58 km from the middle of the area, began a volume at 23:37 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, 11.6 hours before the alert went out and 50 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: 610 J/kg
Mixed-layer CIN: -168 J/kg
Mixed-layer LCL: 1601 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood 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 areal flood advisory went out at Jul 16, 3:34 PM PDT, 1 hour 2 minutes earlier.

Area forecast discussion, Jul 16, 3:34 PM PDT, 1 hour 2 minutes before

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Hazardous weather outlook, Jul 16, 2:43 AM PDT, 13 hours 53 minutes before

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In the hours before

Local storm report, Jul 16, 11:59 AM PDT, 4 hours 37 minutes before

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Local storm report, Jul 16, 12:02 PM PDT, 4 hours 34 minutes before

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Local storm report, Jul 16, 12:18 PM PDT, 4 hours 18 minutes before

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Local storm report, Jul 16, 1:42 PM PDT, 2 hours 54 minutes before

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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, Jul 16, 2:46 PM PDT, 1 hour 50 minutes before

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<body>
  <main class="wrap">
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      <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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      <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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The office that day

Everything else NWS Las Vegas, NV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 5:44 PM PDT	Flash Flood Warning	VEF	Lincoln	2 hr
Jul 15, 10:00 PM PDT	Severe Thunderstorm Warning	VEF	Clark	45 min
Jul 15, 10:07 PM PDT	Areal Flood Advisory	VEF	Clark	53 min
Jul 15, 10:48 PM PDT	Severe Thunderstorm Warning	VEF	Clark	42 min
Jul 15, 10:53 PM PDT	Areal Flood Advisory	VEF	Clark	52 min
Jul 16, 1:09 AM PDT	Severe Thunderstorm Warning	VEF	Clark	36 min
Jul 16, 2:00 AM PDT	Flash Flood Watch	VEF	Clark, Lincoln	19 hr
Jul 16, 1:04 PM PDT	Severe Thunderstorm Warning	VEF	Clark	41 min
Jul 15, 5:28 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	47 min
Jul 15, 6:12 PM PDT	Severe Thunderstorm Warning	VEF	San Bernardino	48 min
Jul 15, 5:42 PM PDT	Flash Flood Warning	VEF	Mohave	93 min
Jul 15, 7:12 PM PDT	Severe Thunderstorm Warning	VEF	Mohave	22 min
Jul 16, 11:53 AM PDT	Flash Flood Warning	VEF	Mohave	3 hr
Jul 16, 1:56 PM PDT	Severe Thunderstorm Warning	VEF	Mohave	27 min
Jul 16, 2:22 PM PDT	Severe Thunderstorm Warning	VEF	Mohave	23 min
Jul 16, 3:03 PM PDT	Flash Flood Warning	VEF	Mohave	60 min
Jul 16, 3:36 PM PDT	Severe Thunderstorm Warning	VEF	Mohave	39 min

Nearby

Areal Flood Advisories in Nevada, 2012 Every areal flood advisory in 2012

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.