Alert archive / Nevada / Heavy Snow Warnings in 2007

Heavy Snow Warning 4, NWS Las Vegas, NV

December 6, 2007Clark County, Lincoln County, Nye County, Nevada

NWS Las Vegas, NV issued this heavy snow warning at Dec 6, 2007, 3:33 PM PST for Clark County, Lincoln County, Nye County, Nevada. It took effect at Dec 7, 2007, 12:00 AM PST. It was in force for 5 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: Dec 6, 2007, 3:33 PM PST (23:33 UTC)
In effect from: Dec 7, 2007, 12:00 AM PST
Expired: Dec 7, 2007, 4:42 AM PST
In force: 5 hr
Issued by: NWS Las Vegas, NV

Counties Clark County, NV, Lincoln County, NV, Nye County, NV

The radar

The Las Vegas radar (KESX), 185 km from the middle of the area, began a volume at 23:30 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

Mercury/Desert R, NV (KDRA), launched 12:00Z, 11.6 hours before the alert went out and 90 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1992 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 145 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 heavy snow 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 heavy snow warning went out at Dec 6, 10:20 AM PST, 5 hours 13 minutes earlier.

Area forecast discussion, Dec 6, 10:20 AM PST, 5 hours 13 minutes before

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Hazardous weather outlook, Dec 6, 5:10 AM PST, 10 hours 23 minutes before

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    <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>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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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
Dec 6, 3:33 PM PST	Snow Advisory	VEF	Clark, Esmeralda, Lincoln, Nye	30 hr
Dec 6, 3:41 PM PST	Wind Advisory	VEF	Clark, Lincoln, Nye	26 hr

Nearby

Heavy Snow Warnings in Nevada, 2007 Every heavy snow warning in 2007

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.