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fxus65 klkn 210803 
afdlkn 


Area forecast discussion 
National Weather Service Elko Nevada 
1203 am PST Sat Nov 21 2009 


Synopsis...a weather disturbance will continue to spread across 
northern Nevada tonight...with snow showers and gusty winds 
possible into Saturday. A second storm system will move through 
northern Nevada on Sunday for another round of snow and gusty 
winds. High pressure rebuilds over the Great Basin beginning 
Monday...with dry conditions and above normal high temperatures 
through Thanksgiving weekend. && 


Update...with winds diminishing in most areas of central Nevada 
earlier this evening...allowed the Wind Advisory to end on 
schedule. As the trough moves over northern Nevada 
tonight...expect localized areas of breezy to windy conditions in 
northeastern Nevada...mainly along eastern slopes of higher 
terrain. Snow showers across northern Nevada will be relatively 
light tonight...with most activity limited to the mountains of 
Humboldt and Elko counties although flurries will be possible in 
valley areas of northern Nevada. 


Remainder of the forecast is unchanged at this time. && 






Previous discussion... /issued at 303 PM / 


Synopsis...a storm system will move into the region tonight. 
Breezy to windy conditions will continue through this evening ahead 
of this system...with snow showers tonight across northern Nevada. 
A weak storm system will brush extreme northern Nevada Sunday. 
High pressure rebuilds over the region Monday on through next week 
with dry conditions and above normal high temperatures expected. 


Short term...tonight through Monday. A strong upper trough and 
its associated cold front are currently moving into nocal/northwest Nevada. 
This system is causing breezy to windy conditions across the 
entire region this afternoon. So far...the strongest winds have 
been over central Nevada where peak gusts between 50-55 miles per hour have been 
experienced. These winds have also been stirring up a lot of dust 
around the area. Kwmc has had the lowest visibility in blowing 
dust today...down to around a mile at times. With the storm system 
continuing to move east this evening...will continue to see breezy 
to windy conditions and areas of blowing dust across our County Warning Area. Will 
continue with Wind Advisory over central Nevada until 8pm. So far 
there has not been a need for a blowing dust advisory over 
Humboldt County as visibilities below 1 mile are not widespread enough 
and should actually be improving over the next few hours as 
clouds/precipitation move into the area. Still appears as if rev's area 
will take the brunt of this storm system. The upper trough will 
lose its punch as it crosses northern Nevada tonight. Winds should 
diminish by this evening...and only expecting a few snow showers 
across northern Nevada overnight. The highest peaks could end up with 
an inch or so of snow...but the valleys of northern Nevada will be 
lucky to see a dusting overnight. 


The storm system will move out of NE Nevada by Saturday afternoon. 
There still should be a few lingering snow showers over far NE Nevada. 
The biggest change tomorrow will be temperatures as they are 
expected to be noticeably cooler than today. Highs Saturday will 
be in the 30s and 40s. 


A much weaker system will clip extreme northern Nevada on 
Sunday...with up to an inch of additional snow in the mountains of 
northern Elko County. Breezy conditions are likely in the area as 
well. Temperatures will warm a little bit and generally be in the 40s. 


High pressure will rebuild over the Great Basin by Monday. 
This will result in dry conditions and near to slightly above 
normal temperatures. 


Long term...Monday night through next Friday. A ridge of high 
pressure is expected to continue across the Great Basin for the 
beginning to middle portions of next week. Expect temperatures to 
gradually increase to near climatological norms through mainly 
Thanksgiving. There is an outside chance for another storm system to 
approach the forecast area by late next week into the weekend...and 
we have slight chance probability of precipitation to account for this. 


Winds will generally be light during the long term period through 
Thursday. 


Aviation...strong south to southwest winds of 20 to 30 knots with 
gusts to around 40 knots will continue ahead of a cold front. Blowing 
dust will result in reduced visibilities and ceilings...with areas 
of MVFR/local IFR conditions north of a ku31-kp68-kely line. Winds 
will ease with the passage of the cold front later this evening from 
west to east. Expect MVFR conditions along and behind the cold front 
due to rain and snow showers. Snow levels will start out around 5500 
to 6000 feet across Elko County and 4500 feet over Humboldt County. 
Snow levels will decrease rapidly behind the cold front...and any 
rain will quickly change to snow. Look for the best chances for 
-shra/-shsn across the northern half of the forecast area. Skies 
will gradually scatter out from west to east after 21/07z. 


&& 


Lkn watches/warnings/advisories... 
none. 
&& 


$$ 


96/99/84