Preview of NWS' New Version of Forecast
This preview is not operational and should not be used for support decisions.

Area Forecast Discussion (AFD)

Issued by Las Vegas, NV (VEF)

                            
164 
FXUS65 KVEF 192231
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
231 PM PST Mon Feb 19 2018

.SYNOPSIS...Winds will settle down this evening, and isolated 
snow showers will dissipate shortly after sunset. Much colder air 
will bring below normal temperatures through the rest of the week, 
with a hard freeze expected in Kingman and surrounding areas 
Wednesday morning. Precipitation chances will return to the Sierra 
on Wednesday, and to much of the Mojave Desert and southern Great 
Basin Thursday night.
&&

.SHORT TERM...through Tuesday. Winds are diminishing in all zones 
except the Barstow area and the Morongo Basin. When the first 
segment expires at 4 PM, plan to cancel the rest of the wind 
products, unless the aforementioned areas need to be extended. 
Spotty snow showers will dissipate shortly after sunset, followed by 
a lot of the clouds as surface temperatures fall and the column 
stabilizes. Next concern is unseasonably cold temperatures. Freeze 
Risk grids for the Kingman area depict a greater risk Wednesday 
morning than tomorrow morning; however, since temperatures have not 
been this cold in about two months, decided to upgrade the Hard 
Freeze Watch to a Warning for both days.

.LONG TERM...Wednesday through Monday.

Next up in this winter 2018 parade of storms drops into the area on 
Wednesday. This one is forecast to remain weak with limited 
moisture, bringing an increase in shower chances to mainly the 
Sierra and for all the area, keeping temperatures from rebounding 
much.

Wednesday's system moves east by early Thursday and then is quickly 
followed by a stronger system that moves over the area Thursday and 
lingers through Friday. This one is expected to bring a much more 
widespread chance of showers but overall, moisture is limited and 
precipitation amounts are expected to be light. More chilly air 
accompanies this one and will result in well below normal conditions 
continuing right up to the weekend. Gusty winds should spread over 
much of the area Thursday and Friday.

Which brings me to the weekend forecast. Right now, Saturday looks 
like a quiet weather day in between systems. The result would be 
dry, cool weather but several degrees warmer than Friday. Mostly 
sunny skies and light winds will make it feel a little warmer as 
well. Very low confidence in whether the next storm will arrive to 
affect the end of the weekend weather on Sunday so I will spare you 
the not-too-clear details for now.
&&

.AVIATION...For McCarran...Clouds will scatter out shortly after 
sunset, and northwest winds will diminish and back around to more 
westerly later in the evening. Winds will return to a more typical 
diurnal pattern of light easterly during the day and southwesterly 
during the night for Tuesday and Wednesday.

For the rest of southern Nevada, northwest Arizona and southeast 
California...Winds will diminish this evening, and clouds and spotty 
snow showers will decrease shortly after sunset. Much quieter 
weather is expected tomorrow and Wednesday, except for precip 
chances returning to the Sierra on Wednesday as the next storm 
system approaches.
&&

.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.
&&

$$

SHORT TERM/AVIATION...Morgan
LONG TERM...Salmen

For more forecast information...see us on our webpage:

http://weather.gov/lasvegas or follow us on Facebook and Twitter