516
FNUS75 KBOU 010329
FWSBOU

Spot Forecast for Upper Diamond Lake Rescue...Boulder County Sheriffs Office
National Weather Service Denver/Boulder CO
929 PM MDT Sat Oct 31 2026

If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Dry conditions can be expected overnight with
temperatures falling below freezing. Winds will be relatively
light for those elevations.

On Sunday, clouds will increase and thicken with scattered light
snow showers. The majority of these will be early in the morning,
and then another round developing late in the afternoon or
evening. Little or no accumulation is expected in this period.

The majority of accumulating snow is expected late Sunday night
through Monday night when 2-5 inches of snow will be possible.
Temperatures will also be turning colder during that period, winds
will become stronger, and mountain obscurations will occur due to
snow and blowing snow.

.REST OF TONIGHT...

Sky/weather.........Partly cloudy (45-55 percent) until 2400, then
                    mostly cloudy (60-70 percent).
Chance of pcpn......0 percent.
Min temperature.....Around 27.
Max humidity........85 percent.
Min apparent temp...20.
Surface winds (mph).Southwest winds 5 to 12 mph until 2400. South 6
                    to 11 mph after 0200.
Snowfall amount.....0.0 inches.

TIME (MDT)      10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........48  48  54  64  63  68  73  77
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0
Temp............28  27  28  28  29  29  29  30
RH..............85  85  81  81  78  78  78  72
Aparnt tmp (F)..21  20  21  21  21  21  21  22
Surface wnd dir.W   SW  SW  S   S   S   S   S
Surface wnd spd.7   7   7   7   8   8   8   8
Surface wnd gst.12  12  12  12  13  13  13  13

.SUNDAY...

Sky/weather.........Mostly cloudy (75-85 percent). Patchy fog until
                    1200. Slight chance of snow after 0900 until
                    1500, then chance of snow and slight chance of
                    rain.
Chance of pcpn......30 percent.
Max temperature.....Around 39.
Min humidity........62 percent.
Min apparent temp...22.
Surface winds (mph).South winds 7 to 12 mph until 0800, then
                    southeast 9 to 14 mph with gusts to around 21
                    mph until 1200, then south 8 to 13 mph until
                    1500, then southwest 7 to 12 mph.
Snowfall amount.....0.0 inches.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........80  82  82  79  84  81  80  81  79  77  77  75
Weather cov.....    SCH CHC CHC CHC SCH SCH SCH SCH CHC CHC CHC
Weather type....    SN  SN  SN  SN  SN  SN  SN  SN  SN  SN  SN
Tstm cov........
Chc of pcpn (%).10  20  30  30  30  20  20  20  20  30  30  30
Temp............30  30  31  32  33  35  36  39  39  39  39  37
RH..............72  75  72  69  72  69  69  70  70  62  64  70
Aparnt tmp (F)..22  22  22  23  25  27  29  32  32  32  33  30
Surface wnd dir.S   S   SE  SE  SE  SE  S   S   S   SW  SW  SW
Surface wnd spd.9   9   10  13  10  10  10  10  10  10  9   9
Surface wnd gst.15  15  16  21  16  16  16  16  16  16  15  15

$$
Forecaster...Barjenbruch
Requested by...1837
Type of request...SAR
.TAG 2624984.0/BOU
.DELDT 10/31/26
.FormatterVersion 2.0.0
.EMAIL awsmith@bouldercounty.gov