Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Las Vegas Nevada
207 am PST sun Feb 1 2015
Synopsis...a dry northwest flow will persist through much of the
coming week with temperatures running well above normal.
Short term...through Tuesday night...clouds associated with the
upper low had completely exited our County Warning Area early this morning.
Satellite loop showed cirrus trying to spill in from the northwest
but dissipating as it comes. Only concern in the immediate term is
fog potential. Smallest surface dewpoint depressions were over
Mohave County...where previous forecasts had mentioned fog...so left
it in place. Down the Colorado River valley...gusty north winds are
expected today and should subside around sunset. Otherwise...quiet
weather is expected through the short term as high pressure sets up
along the West Coast...with high clouds passing by and temperatures
rising several degrees above normal for early February.
Long term...Wednesday through Saturday
Mean ridge will remain positioned over the west/intermountain west
during the period. This will lead to well above normal or
'spring-like' temperatures for the first week of February. Records
continue to look out of reach...but will be Worth watching.
A series of disturbances ejecting out a deep trough over the Pacific
will affect northern California with heavy rain Friday into
Saturday. The strongest disturbance in the series will bring some
enhanced winds to the Sierra crest along with a slight chance of
light showers Friday night/Saturday. The rest of the southern Great
Basin and Mojave Desert will only be affected by more cloud cover.
Aviation...for McCarran...no operationally significant weather is
expected at least through Wednesday.
For the rest of southern Nevada...northwest Arizona...and southeast
California...areas of fog may develop south and east of Kingman
early this morning. North wind gusts of 20-30 knots can be expected
along the Colorado River valley from Laughlin-Bullhead City to
Needles through this afternoon. Otherwise...no operationally
significant weather is expected at least through Wednesday.
Spotter information statement...spotter activation is not expected
at this time.
For more forecast information...see US on our webpage:
Http://weather.Gov/lasvegas or follow US on facebook and twitter