Lake Havasu City Arizona Weather Forecast Discussion

745
FXUS65 KVEF 121751
AFDVEF
Area Forecast Discussion
National Weather Service Las Vegas NV
1051 AM PDT Sun Oct 12 2025
.KEY MESSAGES...
* Precipitation chances and gusty winds return Monday and Tuesday
  onward as a more traditional cool-season, Pacific system
  approaches.
* A Winter Storm Watch has been issued for the Eastern Sierra late
  Monday afternoon into early Wednesday.
&&
.DISCUSSION...through Friday.
For the first time in several days, we will see dry conditions
across the region as a Pacific trough swings through the region.
Along with the dry conditions we will see high temperatures drop
about 7 to 10 degrees from Saturday`s highs.
The next Pacific trough that will impact the area is currently
situated off the southwest Canada coast. This trough will quickly
develop into a closed low and dig down the West Coast over the next
couple of days. As this occurs, it will pick up plenty of Pacific
moisture and bring plenty of precipitation to the Pacific Northwest
Monday and into central California by Monday evening. Precipitation
chances will increase across the southern Sierra Monday afternoon
and begin to spill over into the eastern slopes Monday evening. How
much snow is still in question, but NBM probabilities of 8-12" in
Aspendell are around 60-80%. For this reason, have gone ahead and
issued a Winter Storm Watch for the eastern Sierra from late Monday
afternoon through early Wednesday morning. This system will also be
relatively cold, so snow levels are expected to drop to around 7000
feet. Current thinking is 1-2 feet of snow between 7000-9000 feet
and upwards of 2 feet or greater near the Sierra crest. Another
concern we have would be how much precipitation will be rainshadowed
by the Sierra as this system moves in. It looks like the flow will
be more favorable for this spillover to occur and rain is expected
to spread into the Owens Valley by Tuesday morning and across
Esmeralda, central Nye, and northern Lincoln counties by Wednesday
morning. Areas to the south will remain dry, but gusty southwest
winds are likely with the potential for impactful wind gusts over 40
MPH in parts of the Southern Great Basin Monday and Tuesday.
As the system moves inland, winds will decrease the rest of the week
as the low center moves over. Temperatures will remain well below
normal through the period, with the coldest temperatures expected
Tuesday night through Wednesday night. A Freeze Watch may be needed
for the Owens Valley Monday night, if not definitely Tuesday night
as ensembles probabilities show increasing chances for low
temperatures below 32F at Bishop and the valley areas.
&&
.AVIATION...For Harry Reid...For the 18Z Forecast
Package...Northerly wind gusts have largely diminished, though an
errant gust to around 12KT cannot be ruled out within the next 2
hours. Winds will start off somewhat variable between 350-020
true, before settling out of the northeast and becoming light by
early afternoon. Thereafter, winds remain light through tonight,
settling out of the southwest after sunset. Southwesterly winds
will then persist, increasing and becoming gusty by late morning,
with gusts to 20-25KT expected through the afternoon. VFR
conditions prevail, with increasing mid and high clouds tonight
through Monday.
For the rest of southern Nevada, northwest Arizona and southeast
California...For the 18Z Forecast Package...Northerly to
northeasterly winds will be the rule through late afternoon
across the area, with northerly gusts gradually diminishing over
the next few hours. The strongest gusts to around 25KT will
continue through the Colorado River Valley and northwestern
Arizona this afternoon, with light winds expected areawide this
evening and tonight. Winds are expected to shift to the southwest
late in the period and begin increasing, with stronger westerly
winds expected across the western Mojave Desert, including at
KDAG. The exception to these trends will be KBIH in the Owens
Valley, where light diurnal winds continue. VFR conditions prevail
areawide, with FEW-SCT clouds between 15-25kft this evening
onward.
&&
.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.
&&
$$
DISCUSSION...Gorelow
AVIATION...Phillipson
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NWS VEF Office Area Forecast Discussion