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000
FXUS65 KVEF 170949
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
249 AM PDT Tue Sep 17 2019

.SYNOPSIS...Lighter winds along with cooler temperatures will be
felt across the region today. Another weather system will move into
the western States Wednesday and Thursday bringing another round of
gusty winds along with a chance of showers to central Nevada and the
Sierra.
&&

.DISCUSSION...through Tuesday.

Should be a fairly quite day across the forecast area as the trough
that brought the gusty winds Monday shifts east. We will still have
some gusty residual winds this morning, but winds are expected to
diminish by late morning with generally light winds this afternoon.
We will also see cooler temperatures today with readings down about
5-7 degrees from Monday`s highs.

The next system to affect us is currently sliding southeast out of
the Gulf of Alaska and will start to impact the region as early as
Wednesday with increasing southwest winds. Although most areas will
see breezy to windy conditions, wind speeds should generally remain
below advisory levels. A cold front will then push south through
Nevada on Thursday with breezy to windy conditions across much of
the area. There could be a brief period of higher wind speeds just
behind the front, but strong winds do not look to be widespread
enough for wind advisories. This could be more of an impact on fire
weather and this will certainly need to be watched, but it looks
like the humidity levels will remain elevated enough to keep from
issuing Red Flag products. However, this will need to be monitored.
A few showers will also be possible behind the front across the
Sierra and central Nevada, but this looks to mainly impact portions
of Esmeralda, central Nye, and northern Lincoln Counties.

By Friday we will see a dry northwest flow with occasional breezy
conditions, but overall conditions look to remain dry through the
weekend along temperatures slowly climbing to above normal.
&&

.AVIATION...For McCarran...Winds were southerly early this morning,
but there could be a brief period of gusty northerly winds mid to
late morning as a cold front reaches the Valley. Southerly winds 10
knots or less are expected this afternoon through Wednesday morning,
then speeds will increase Wednesday afternoon with gusts of 20 to 25
knots. No operationally significant clouds are expected through the
period.

For the rest of southern Nevada, northwest Arizona and southeast
California...A cold front will make it most of the way through the
region today, with breezy southwest winds ahead of it over Mohave
County and northerly gusts over the southern Great Basin decreasing
around noon. Southwesterly winds will begin to increase Wednesday
afternoon, with gusts of 15 to 25 knots common areawide. Clouds will
clear out of Mohave County this morning, with no operationally
significant clouds expected otherwise.
&&

.FIRE WEATHER...Gusty southwest winds will remain in place this
morning, but winds are expected to diminish by late morning with
wind speeds generally less than 10 mph by afternoon. Another system
will approach the area Wednesday bringing increasing southwest winds
once again. At this time, wind speeds look to remain below critical
levels. A cold front will move through the region Thursday with
gusty southwest winds ahead of the front and gusty northwest winds
behind. We could see a brief period of critical fire weather ahead of
the front and this will need to be watched for the potential of any
headlines. Higher RH readings are expected behind the front as
cooler air is expected to work into the region.
&&

.SPOTTER INFORMATION STATEMENT...Another system will bring more
gusty winds to the region Wednesday and Thursday. While spotter
activation is not anticipated, spotters are encouraged to report any
wind impacts according to standard operating procedures.
&&

$$

DISCUSSION/FIRE WEATHER...Gorelow
AVIATION.....Morgan

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