Area Forecast Discussion
Issued by NWS Las Vegas, NV

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FXUS65 KVEF 070434

Area Forecast Discussion
National Weather Service Las Vegas NV
834 PM PST Tue Dec 6 2016

.SYNOPSIS...A cold front will move through the area tonight and
Wednesday bringing breezy conditions to the Colorado River Valley
and cooler temperatures area wide. Temperatures will warm back up
again during the latter part of the week.

.UPDATE...North winds associated with the cold front pushing down
through southern Nevada will be a little slower to spread over Clark
County and points to the south. The 00Z WRF and HRRR indicate north
winds will make it down through central and southern Clark County a
little after midnight with speeds generally 10-20 mph. Gusts over 40
mph were still evident this evening over parts of western San
Bernardino County but should generally drop below 30 mph by 06Z, so
will let the Wind Advisory continue as scheduled. Wind grids will be
updated with the latest local 4KM WRF NAM input. -Adair

.AVIATION...For McCarran...Light, diurnally-driven winds and VFR
conditions are expected through the period. South-southwest winds
this evening will transition to a northerly direction around or
shortly after 08Z. Wind speeds could be fickle most of the night
before a more consistent north-northeast wind develops
arounddaybreak Wednesday with gusts possibly up to 20 knots.

For the rest of southern Nevada...northwest Arizona...and
southeastCalifornia...A cold front pushing down through southern
Nevada andsurrounding areas will bring north winds 10-20 knots to
the regionovernight. The strongest north winds on Wednesday will
impact KEEDand KIFP with gusts up to 30 kts possible. VFR conditions
areexpected across the area through the period.

219 PM PST Tue Dec 6 2016

.DISCUSSION...Gusty west winds in excess of 40 mph will continue
across the Mojave Desert this evening. No change was done to
the existing Wind Advisory.

Those winds will start to diminish after midnight as a shortwave
moves through northeast Nevada and into Utah tonight. A cold front
associated with the shortwave will work south through southern
Nevada tonight. Hi-Res models showing a mixed bag regarding frontal
passage for Las Vegas. Consensus indicates wind shift will be around
9 pm with more consistent and gusty northeast wind developing around

Models have stayed consistent that Thursday morning will not be as
cold as models suggest just a few days ago. This seems to be helped
by models showing more clouds overhead.

Between Thursday and next Tuesday models in agreement showing a fast
progressive zonal flow. There is usually lower confidence in these
patterns due to the difficult timing of individual disturbances. The
only agreement seems to be that both models show quite a bit of
cloudiness streaming through the western CONUS with most of the
precipitation just grazing our northern areas.

.SPOTTER INFORMATION STATEMENT...Spotter activation will not be



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