Mammoth Mountain
Stoke today Oct 30
Next 24 hours forecast
Forecast
1.5″
best available forecast · as of Oct 30 15:57
NWS 1.5″ · Open-Meteo 0.0″
Last 24 hours measured
Station
—
no snow station linked yet
Next 48 hours (10.5″ snow · as of Oct 30 15:57)
10-day outlook
Forecast data: National Weather Service; Weather data by Open-Meteo.com (CC BY 4.0); Data from MET Norway (CC BY 4.0) — adapted by SnowAlert.
In the forecaster’s words
Today 1–2″
Snow likely. Mostly cloudy. High near 33, with temperatures falling to around 29 in the afternoon. Wind chill values as low as 15. Southwest wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
This Afternoon 0–1″
A chance of snow. Partly sunny. High near 33, with temperatures falling to around 31 in the afternoon. Wind chill values as low as 19. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Tonight 0–0.5″
A chance of snow. Mostly cloudy. Low around 27, with temperatures rising to around 31 overnight. Wind chill values as low as 20. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New snow accumulation of less than half an inch possible.
Saturday 4–6″
Snow. Mostly cloudy. High near 31, with temperatures falling to around 29 in the afternoon. Wind chill values as low as 14. South southwest wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New snow accumulation of 4 to 6 inches possible.
Saturday Night 7–11″
Snow. Cloudy, with a low around 25. Wind chill values as low as 15. Southwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of 7 to 11 inches possible.
Sunday 1–2″
Snow likely before 4pm. Partly sunny, with a high near 30. West wind 5 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Regional forecast discussion NWS REV · Oct 30 02:34
Written by the National Weather Service's REV office for its whole forecast area, not for Mammoth Mountain alone.
* Chances of light rain and mountain snow continue through the day mainly for the Sierra and vicinity areas. * A storm system on Saturday and Sunday brings colder temperatures along with light valley rain, and mountain snow above 7000 ft. * Drier and warmer conditions return by Sunday afternoon through mid-week next week.
Read the full discussion
000
FXUS65 KREV 300934
AFDREV
Area Forecast Discussion
National Weather Service Reno NV
234 AM PDT Fri Oct 30 2026
.KEY MESSAGES...
* Chances of light rain and mountain snow continue through the day
mainly for the Sierra and vicinity areas.
* A storm system on Saturday and Sunday brings colder temperatures
along with light valley rain, and mountain snow above 7000 ft.
* Drier and warmer conditions return by Sunday afternoon through
mid-week next week.
&&
.DISCUSSION...
Current radar imagery shows a band of light rain and light mountain
snow over Central CA and the western slopes of the Sierra. Most
of it is being blocked at the crest with a few light showers
spilling over to the eastern slopes of the Sierra and western NV.
Rain amounts are very light or none at all. This is expected to
continue through the morning hours per the HREF and REFS. Although
more spillover is expected later this morning especially for the
Sierra and Sierra Front. Rain also develops in areas east of
US-95, especially closer to far eastern Churchill/Pershing
counties today. Activity will be more spotty this afternoon and
evening, so expect breaks with the light rain in western NV, and
the rain snow mix in the Sierra. Snow levels will be around
7000-7500 feet, above those elevations a trace to 3 inches of snow
are possible through the evening hours today. Chances of
exceeding 3 inches are 10-50%+ above 10 kft south of US-50, and a
10-40% of exceeding one inch above 7 kft.
The models are finally starting to align with better consistency
for a clearer scenario on Saturday and Sunday. The broad upper
low off the PacNW generates a secondary low in the Eastern Pacific
and pulling a plume of warm and moist air which, merges with the
colder and drier air from the northern system over California and
Nevada. This scenario has led to an increase in precipitation
with snow levels starting around 7-8 kft Saturday and potentially
dropping to 5 kft or lower by Sunday morning. The main area of
concern will be in the Sierra above 7000 ft, where snow amounts
of 3-6 inches are likely with a 10-40% chance of exceeding 6
inches north of US-50 and 30-60% to the south of US-50 by Sunday
afternoon. At Lake Tahoe level and US-395 in Mono county, there
is a 10-50% chance of reaching 2 inches of snow by Sunday
afternoon too. A Winter Weather Advisory remains in effect for the
Sierra for the above reasons. Checking with CalTrans and NDOT
(for Mt. Rose Highway) for the latest road conditions is
recommended as travel through these areas, especially the passes
will be hazardous.
Western NV and NE CA valleys will see mostly rain with a low
(5-15%) chance of a wintry mix making it to valley floors on
Sunday morning. The moisture is mostly leaving as the really cold
air makes it in. So, a few snow showers amounting up to a trace or
a dusting of snow are possible by Sunday morning in the valleys.
By Sunday evening through Tuesday or Wednesday next week warmer
and drier conditions are expected with an upper ridge developing
in the region. Model uncertainty continues with the ending of the
precipitation on Sunday as some ensemble members keep showers in
the area through Sunday night, albeit light. Then again with the
approach of the next system sometime between Tuesday evening and
Thursday, and a potentially subsequent system for the following
weekend. However, based on how guidance has behaved this week, I
wouldn't put much trust in them until at least early next week.
-HC
&&
.AVIATION...
VFR conditions with brief periods of MVFR are expected through
Saturday morning over western NV and northeast CA. The periods of
MVFR will be due to -RA primarily reducing CIGs. VIS reductions
should be minimal, except near the strongest showers. Rain
chances are 5-30% through Saturday morning. For KTRK, KTVL and
KMMH, expect periods of VFR and MVFR due to low clouds and 30%+
chances of -RA/-SN. Snow chances will be higher in the early
morning hours, especially around sunrise. Little to no snow
accumulations are expected. Mountain obscurations prevail through
the weekend. Periods of turbulence and LLWS are expected through
this morning, then return again late this evening.
More valley rain and mountain snow is expected on Saturday and
Sunday with the next system.
-HC
&&
.REV Watches/Warnings/Advisories...
NV...Winter Weather Advisory from 8 AM Saturday to 7 AM PDT Sunday
NVZ002.
CA...Winter Weather Advisory from 8 AM Saturday to 7 AM PDT Sunday
CAZ072-073.
&&
$$
Sources & last updated
- Data from MET Norway — CC BY 4.0, adapted by SnowAlert fetched Oct 30 14:10
- National Weather Service fetched Oct 30 15:57
- Weather data by Open-Meteo.com, from the ECMWF and NOAA models — CC BY 4.0, adapted by SnowAlert fetched Oct 30 15:07