Alert archive / Nevada / Freeze Warnings in 2006

Freeze Warning 1, NWS Las Vegas, NV

November 29, 2006Clark County, Nevada; San Bernardino County, California

NWS Las Vegas, NV issued this freeze warning at Nov 29, 2006, 3:33 AM PST for Clark County, Nevada; San Bernardino County, California. It took effect at Nov 30, 2006, 12:00 AM PST. It was in force for 8 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
Nov 29, 2006, 3:33 AM PST (11:33 UTC)
In effect from
Nov 30, 2006, 12:00 AM PST
Expired
Nov 30, 2006, 8:00 AM PST
In force
8 hr
Issued by
NWS Las Vegas, NV

Counties San Bernardino County, CA, Clark County, NV

The radar

The Las Vegas radar (KESX), 67 km from the middle of the area, began a volume at 11:32 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 00:00Z, 11.6 hours before the alert went out and 127 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, Mercury/Desert R, NV at 00:00Z on 2006-11-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLEL10008507005003002001001 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, Mercury/Desert R, NV at 00:00Z on 2006-11-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 square meters per square second.1939587897Sfc1 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
2 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1760 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
-31 m²/s²
0-3 km storm-relative helicity
143 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 freeze 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 freeze warning went out at Nov 29, 2:55 AM PST, 38 minutes earlier.

Area forecast discussion, Nov 29, 2:55 AM PST, 38 minutes before
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Hazardous weather outlook, Nov 28, 11:00 AM PST, 16 hours 33 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAS VEGAS NV
1100 AM PST TUE NOV 28 2006

CAZ523-524-291000-
WESTERN MOJAVE DESERT-EASTERN MOJAVE DESERT-
1100 AM PST TUE NOV 28 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT
A WIND ADVISORY CONTINUES OVER PORTIONS OF SAN BERNARDINO COUNTY
TODAY. THE WINDS ARE EXPECTED TO INCREASE AS THE DAY WEARS ON AND COULD
CREATE PROBLEMS FOR TRAVELERS ALONG INTERSTATE 15 AND 40. SEE
RNONPWVEF FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
A STRONG SURFACE COLD FRONT WILL MOVE THROUGH THE AREA EARLY
WEDNESDAY BRINGING STRONG GUSTY WINDS TO MUCH OF SOUTHERN
CALIFORNIA. A VERY COLD AIRMASS WILL BEGIN SETTLING INTO THE
REGION BEHIND THE FRONT WITH MUCH BELOW NORMAL TEMPERATURES
EXPECTED. TEMPERATURES THURSDAY AND FRIDAY MORNING WILL FALL BELOW
FREEZING FOR THE FIRST TIME THIS SEASON IN THE LOWER ELEVATIONS.

.SPOTTER INFORMATION STATEMENT...
NO SPOTTER ACTIVATION EXPECTED TODAY OR TONIGHT BUT SPOTTERS ARE
ENCOURAGED TO REPORT ANY SIGNIFICANT WIND EVENTS ACCORDING TO
STANDARD OPERATING PROCEDURES.

AZZ001-003-CAZ522-525-526-NVZ016-017-020-022-291000-
NORTHWEST PLATEAU-NORTHWEST DESERTS-DEATH VALLEY NATIONAL PARK-
MORONGO BASIN-CADIZ BASIN-NORTHEAST CLARK COUNTY-
WESTERN CLARK AND SOUTHERN NYE COUNTY-LAS VEGAS VALLEY-
SOUTHERN CLARK COUNTY-
1100 AM PST TUE NOV 28 2006 /1200 PM MST TUE NOV 28 2006/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
ARIZONA...CALIFORNIA AND SOUTHERN NEVADA.

.DAY ONE...TODAY AND TONIGHT
NO HAZARDOUS WEATHER EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
A STRONG SURFACE COLD FRONT WILL MOVE THROUGH THE AREA EARLY
WEDNESDAY BRINGING STRONG GUSTY WINDS TO MUCH OF SOUTHERN
NEVADA...NORTHWEST ARIZONA AND SOUTHERN CALIFORNIA. A VERY COLD
AIRMASS WILL BEGIN SETTLING INTO THE REGION BEHIND THE FRONT WITH
MUCH BELOW NORMAL TEMPERATURES EXPECTED AREA WIDE BY WEDNESDAY
AFTERNOON. OVERNIGHT TEMPERATURES WILL FALL BELOW FREEZING FOR
THE FIRST TIME THIS SEASON IN THE LOWER ELEVATIONS BOTH THURSDAY
AND FRIDAY MORNING.

.SPOTTER INFORMATION STATEMENT...
NO SPOTTER ACTIVATION EXPECTED TODAY OR TONIGHT.

AZZ002-036-CAZ527-NVZ021-291000-
LOWER COLORADO RIVER VALLEY-LAKE MEAD NATIONAL RECREATION AREA-
SAN BERNARDINO COUNTY-UPPER COLORADO RIVER VALLEY-
1100 AM PST TUE NOV 28 2006 /1200 PM MST TUE NOV 28 2006/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
ARIZONA...CALIFORNIA AND SOUTHERN NEVADA.

.DAY ONE...TODAY AND TONIGHT
NO HAZARDOUS WEATHER EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
A STRONG SURFACE COLD FRONT WILL MOVE THROUGH THE AREA ON
WEDNESDAY BRINGING VERY STRONG GUSTY WINDS TO THE LAKE MEAD
RECREATION AREA AND ALSO ALONG THE COLORADO RIVER VALLEY. SEE
RNONPWVEF FOR DETAILS ON A HIGH WIND WATCH FOR THIS REGION. A
COLD AIRMASS WILL SETTLE INTO THE REGION BEHIND THE FRONT
WEDNESDAY NIGHT AND THURSDAY WITH MUCH BELOW NORMAL TEMPERATURES
EXPECTED. OVERNIGHT TEMPERATURES WILL FALL TO NEAR FREEZING FOR
THE FIRST TIME THIS SEASON THURSDAY AND FRIDAY MORNING.

.SPOTTER INFORMATION STATEMENT...
NO SPOTTER ACTIVATION EXPECTED TODAY OR TONIGHT.

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 28, 7:35 PM PSTWind AdvisoryVEFClark, Nye22 hr

Nearby

Freeze Warnings in Nevada, 2006Freeze Warnings in California, 2006Freeze Warnings in Arizona, 2006Every freeze warning in 2006

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.