Alert archive / Nevada / Mesoscale Discussions in 2014

Mesoscale Discussion 1765

September 26, 2014Clark County, Lincoln County, White Pine County, Nevada; Iron County, Washington County, Utah

The Storm Prediction Center issued this mesoscale discussion at Sep 26, 2014, 11:44 AM PDT for Clark County, Lincoln County, White Pine County, Nevada; Iron County, Washington County, Utah. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Sep 26, 2014, 11:44 AM PDT (18:44 UTC)
Expired
Sep 26, 2014, 1:45 PM PDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%

Counties Clark County, NV, Lincoln County, NV, White Pine County, NV, Iron County, UT, Washington County, UT

The radar

The Cedar City radar (KICX), 154 km from the middle of the area, began a volume at 18:45 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, 6.7 hours before the alert went out and 180 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 2014-09-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 365 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 2014-09-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 square meters per square second.193958Sfc1 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
365 J/kg
Mixed-layer CIN
-151 J/kg
Mixed-layer LCL
2032 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 26, 3:09 PM PDTMesoscale DiscussionSPCClark66 min

Nearby

Mesoscale Discussions in Nevada, 2014Mesoscale Discussions in Utah, 2014Every mesoscale discussion in 2014

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.