Alta Sierra, California 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Alta Sierra CA
National Weather Service Forecast for:
Alta Sierra CA
Issued by: National Weather Service Sacramento, CA |
Updated: 12:21 am PDT Jun 6, 2025 |
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Overnight
 Clear
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Friday
 Sunny
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Friday Night
 Clear
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Saturday
 Sunny
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Saturday Night
 Mostly Clear
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Sunday
 Sunny
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Sunday Night
 Mostly Clear
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Monday
 Sunny
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Monday Night
 Clear
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Lo 61 °F |
Hi 86 °F |
Lo 61 °F |
Hi 89 °F |
Lo 62 °F |
Hi 89 °F |
Lo 62 °F |
Hi 89 °F |
Lo 60 °F |
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Overnight
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Clear, with a steady temperature around 61. Calm wind. |
Friday
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Sunny, with a high near 86. Calm wind becoming west around 6 mph in the afternoon. |
Friday Night
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Clear, with a low around 61. Calm wind. |
Saturday
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Sunny, with a high near 89. Calm wind becoming west southwest around 6 mph in the afternoon. |
Saturday Night
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Mostly clear, with a low around 62. West southwest wind around 5 mph becoming calm in the evening. |
Sunday
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Sunny, with a high near 89. |
Sunday Night
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Mostly clear, with a low around 62. |
Monday
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Sunny, with a high near 89. |
Monday Night
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Clear, with a low around 60. |
Tuesday
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Sunny, with a high near 89. |
Tuesday Night
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Clear, with a low around 60. |
Wednesday
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Sunny, with a high near 89. |
Wednesday Night
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Clear, with a low around 59. |
Thursday
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Sunny, with a high near 85. |
Forecast from NOAA-NWS
for Alta Sierra CA.
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Weather Forecast Discussion
089
FXUS66 KSTO 052033
AFDSTO
Area Forecast Discussion
National Weather Service Sacramento CA
133 PM PDT Thu Jun 5 2025
.DISCUSSION...
.SYNOPSIS...
Warm and dry weather continues today, with a warm-up expected over
the weekend, with likely triple digit temperatures and Major
HeatRisk in parts of the northern Sacramento Valley. Periodically
breezy winds continuing into next week. Daily afternoon/evening
mountain thunderstorm chances (10-15%) will continue today and
through the weekend over the High Sierra.
&&
.KEY MESSAGES...
* Today-Tuesday:
-Slightly cooler temperatures today, before high temperatures
follow a warming trend Friday and into early next week with
Moderate HeatRisk and some areas of Major HeatRisk
--Probability of Valley High Temperatures > 95F:
---Northern/Central Sacramento Valley: 75-100%
---Delta, S. Sacramento Valley, N. San Joaquin Valley: 40-80%
--Probability of Valley High Temperatures > 100F:
---Northern/Central Sacramento Valley: 40-70%, Saturday-Monday
-Chances for isolated afternoon/early evening mountain showers
and thunderstorms:
--Today-Saturday: 15-25%, South of US 50 along the Sierra Crest.
--Sunday-Monday: 10-20%, Along the Sierra Crest
.CHANGES FROM PREVIOUS FORECAST...
-Probability for temperatures over 100F have increased slightly
in the northern Sacramento Valley
&&
.AVIATION...
VFR conditions prevail over interior NorCal next 24 hours.
Surface winds generally below 12 kts, except in the vicinity of
the Delta where surface winds could get up to 25 kts between 22Z
Thursday and 06Z Friday. Additionally, there is a 15-25% chance of
isolated showers or thunderstorms over the Sierra south of US 50
until and 03Z Friday.
&&
.STO WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
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