Spot Forecast
Issued by NWS Sacramento, CA
Issued by NWS Sacramento, CA
664
FNUS76 KSTO 020442
FWSSTO
Spot Forecast for Plumas Cal-Trex Old Highway...USFS
National Weather Service Sacramento CA
942 PM PDT Fri May 1 2026
Forecast is based on ignition time of 0600 PDT on May 02.
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...
Mostly dry weather on Saturday, with a nonzero chance for light
showers and a 15-20% chance of isolated afternoon thunderstorms.
Breezy south winds develop on Saturday by late morning, with
Valley/slope gusts up to 15 mph and ridgetop gusts up to 20 to 25
mph.
A spring weather system will bring rain showers and Sunday
through early Tuesday, with a 15-30% chance for scattered
thunderstorms. Highest chances for thunderstorms (20-30% chance)
on Sunday, a few of which may be strong to severe. Gusty to
erratic winds are expected near any thunderstorm that develops.
Storm total rain amounts are forecast between 0.80-1.00 inch.
.SATURDAY...
Sky/weather.........Partly sunny. Slight chance of rain late in the
morning. Slight chance of showers and
thunderstorms late in the afternoon, then
slight chance of rain late in the afternoon.
Max temperature.....73-77.
Min humidity........37-41 percent.
Wind (20 ft)........
Slope/valley.......Light winds becoming south up to 6 mph in the
afternoon. Gusty and erratic winds expected
near thunderstorms late in the afternoon.
Ridgetop...........South 6 to 12 mph increasing to 21 to 24 mph
late in the morning.
Mixing height.......8000 ft AGL.
Transport winds.....South 6 to 24 mph increasing to 12 to 21 mph
early in the morning, then increasing to 21 to
24 mph late in the afternoon.
CWR.................5 percent.
Chance of thunder...16 percent.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MC MC MC MC MC MC MC MC MC MC MC MC
CWR.............0 0 0 0 0 10 10 10 10 10 10 10
Chc of thdr (%).0 0 0 0 0 10 10 10 20 20 20 10
Temp............48 47 50 53 60 66 71 73 74 75 73 72
RH..............76 74 73 67 58 48 44 42 39 38 39 41
SL/VL wind dir..N N SE SE S S S S S S S S
SL/VL wind spd..0 0 1 1 2 2 5 5 6 6 6 5
SL/VL wind gust.1 1 2 5 6 9 10 12 12 13 13 12
Ridge wind dir..SE SE S S S S S S S S S S
Ridge wind spd..6 6 12 12 12 21 21 21 24 24 24 21
Mix hgt (kft)...1.8 1.8 3.7 3.7 3.7 7.7 7.7 7.7 8.0 8.0 8.0 6.6
Transp wind dir.SE SE S S S S S S S S S S
Transp wind spd.6 6 12 12 12 21 21 21 24 24 24 21
.SATURDAY NIGHT...
Sky/weather.........Mostly cloudy. Slight chance of rain, then
chance of rain early in the morning.
Min temperature.....45-49.
Max humidity........82-86 percent.
Wind (20 ft)........
Slope/valley.......South winds up to 5 mph early in the evening
becoming light.
Ridgetop...........South around 21 mph decreasing to around 8 mph
early in the evening, then shifting to the east
6 to 8 mph late in the evening.
Mixing height.......1800 ft AGL.
Transport winds.....South around 21 mph decreasing to around 8 mph
early in the evening, then shifting to the east
6 to 8 mph late in the evening.
CWR.................6 percent.
Chance of thunder...12 percent.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky cover.......MC MC MC MC MC MC MC MC MC MC MC MC
CWR.............10 10 10 10 10 10 10 10 10 10 10 10
Chc of thdr (%).10 10 0 0 0 0 0 0 0 0 0 0
Temp............70 65 61 58 56 54 52 51 50 49 48 47
RH..............43 52 62 67 70 72 74 75 76 79 82 84
SL/VL wind dir..S S S S S E E E E E E E
SL/VL wind spd..5 5 2 2 2 1 1 1 1 1 1 1
SL/VL wind gust.12 12 5 5 5 2 2 2 2 2 2 2
Ridge wind dir..S S S S S E E E E E E E
Ridge wind spd..21 21 8 8 8 6 6 6 7 7 7 8
Mix hgt (kft)...6.6 6.6 2.1 2.1 2.1 1.8 1.8 1.8 1.8 1.8 1.8 1.8
Transp wind dir.S S S S S E E E E E E E
Transp wind spd.21 21 8 8 8 6 6 6 7 7 7 8
.SUNDAY...
Sky/weather.........Mostly cloudy. Chance of rain in the morning,
then rain showers likely and chance of
thunderstorms late in the morning.
Max temperature.....69-73.
Min humidity........56-60 percent.
Wind (20 ft)........
Slope/valley.......Light winds. Gusty and erratic winds expected
near thunderstorms late in the morning.
Ridgetop...........Southeast 5 to 8 mph shifting to the southwest
10 to 13 mph late in the afternoon.
Mixing height.......6500 ft AGL.
Transport winds.....East around 8 mph shifting to the southeast 5
to 8 mph in the morning and early afternoon,
then shifting to the southwest 10 to 13 mph
late in the afternoon.
CWR.................6 percent increasing to 61 percent late in the
morning, then decreasing to 49 percent late in
the afternoon.
Chance of thunder...27 percent.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MC MC MC MC MC MC MC MC MC MC MC MC
CWR.............10 10 10 10 10 60 60 60 60 60 60 50
Chc of thdr (%).0 0 10 10 10 30 30 30 30 30 30 30
Temp............47 48 49 54 59 64 67 68 68 67 66 63
RH..............86 86 83 76 67 59 56 55 57 60 64 69
SL/VL wind dir..E E N N N SW SW SW W W W SW
SL/VL wind spd..1 1 0 0 0 1 1 1 3 3 3 2
SL/VL wind gust.2 2 1 1 1 5 5 5 7 7 7 7
Ridge wind dir..E E E E E SE SE SE W W W SW
Ridge wind spd..8 8 5 5 5 8 8 8 13 13 13 10
Mix hgt (kft)...1.8 1.8 1.8 1.8 1.8 6.5 6.5 6.5 4.5 4.5 4.5 3.3
Transp wind dir.E E E E E SE SE SE W W W SW
Transp wind spd.8 8 5 5 5 8 8 8 13 13 13 10
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...
Cooler. Showers likely and chance of thunderstorms. Lows in the
mid 40s. Highs around 60. Light winds.
.TUESDAY...
Warmer. Mostly cloudy. Rain likely and slight chance of
thunderstorms. Lows in the lower 40s. Highs in the lower 70s.
Light winds.
.WEDNESDAY...
Partly cloudy. Slight chance of rain. Lows in the mid 40s. Highs
around 80. Light winds.
$$
Forecaster...KF
Requested by...Michael Sprinkle
Type of request...PRESCRIBED
.TAG 2612481.0/STO
.DELDT 05/01/26
.FormatterVersion 2.0.0
.EMAIL michael.sprinkle@usda.gov