166
FNUS75 KBOU 131027
FWSBOU

Spot Forecast for Harris Park RX - Unit O...USFS
National Weather Service Denver/Boulder CO
427 AM MDT Tue Oct 13 2026

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

.DISCUSSION...
Temperatures will trend cooler and moisture will increase over the
next two days. Winds will be out of the south/southwest today,
with wind speeds around 10mph and gusts around 15 to 20mph this
afternoon. Winds will quickly weaken after sunset, turning more
easterly overnight. Minimum RHs today will remain above 40%.
Showers will continue on and off around the area for much of the
afternoon and evening. Smoke dispersal will be good or better for
much of the afternoon. Precipitation chances will increase this
evening and overnight, peaking Wednesday evening. This activity
will likely be a rain/snow mix starting late Tuesday into early
Wednesday, transitioning to all snow by Wednesday night.
Accumulations of an inch or two will be possible by Thursday
morning. RHs will be much higher on Wednesday, with values
remaining above 80% all day. Smoke dispersal will remain poor on
Wednesday.

.TODAY...

Sky/weather.........Partly cloudy (35-45 percent) until 1500, then
                    mostly cloudy (55-65 percent). Slight chance of
                    rain showers until 1500, then chance of rain
                    showers and slight chance of thunderstorms.
CWR.................6 percent.
Chance of pcpn......40 percent.
Chance of thunder...16 percent.
Max temperature.....Around 53.
Min humidity........42 percent.
Wind (20 ft)........Southwest winds around 5 mph until 0800.
                    Southeast around 7 mph after 1700. Gusty and
                    erratic winds expected near thunderstorms after
                    1500.
Mixing height.......Below 1000 FT AGL until 0900. 5500 ft AGL after
                    1100.
Transport winds.....Southwest 8 to 17 mph until 1300, then south 13
                    to 22 mph.
Smoke dispersal.....Poor until 1100, then good until 1300, then
                    very good until 1600, then good until 1700,
                    then fair.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........46  37  35  33  34  33  48  48  50  57  60  62
Weather cov.....SCH SCH SCH SCH SCH SCH SCH SCH SCH CHC CHC CHC
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........                                    SCH SCH SCH
CWR.............10  10  10  10  10  10  10  10  10  10  10  10
Chc of pcpn (%).20  20  20  20  20  20  20  20  20  40  40  40
Chc of thdr (%).10  10  10  10  10  10  10  10  10  20  20  20
Temp............40  38  38  41  46  49  50  51  52  51  50  49
RH..............73  79  82  79  60  52  48  46  43  42  48  50
20 FT wind dir..SW  S   S   S   S   S   S   S   S   S   S   SE
20 FT wind spd..3   3   3   3   5   7   9   10  10  10  9   7
20 FT wind gust.5   6   7   9   12  15  16  17  17  17  16  14
Mix hgt (kft)...0.6 0.6 0.7 1.8 2.9 4.6 5.4 5.8 6.6 6.0 5.1 3.8
Transp wind dir.SW  SW  SW  SW  SW  SW  SW  SW  SW  S   S   S
Transp wind spd.9   9   8   9   13  16  17  21  22  20  15  13
Vrate kt-ft/1K..5   5   5   14  32  65  81  104 125 102 67  42
SmokeDispersion.P   P   P   P   P   G   G   VG  VG  VG  G   F

.TONIGHT...

Sky/weather.........Mostly cloudy (70-80 percent). Chance of rain
                    showers and slight chance of thunderstorms
                    until 2400, then rain and snow showers likely.
CWR.................12 percent increasing to 30 percent overnight.
Chance of pcpn......70 percent.
Chance of thunder...16 percent.
Min temperature.....Around 33.
Max humidity........100 percent.
Wind (20 ft)........Southeast winds around 5 mph until 2300, then
                    variable up to 5 mph. Gusty and erratic winds
                    expected near thunderstorms until 2100.
Mixing height.......1200 ft AGL until 2000, then Below 1000 FT AGL
                    until 2200, then 1000 ft AGL until 2300, then
                    Below 1000 FT AGL until 0200, then 1200 ft AGL
                    until 0300, then Below 1000 FT AGL until 0500,
                    then 1500 ft AGL.
Transport winds.....Southeast 8 to 10 mph until 2000, then light
                    until 2100, then southeast 8 to 9 mph until
                    2300, then 8 to 10 mph until 0100, then 8 to 11
                    mph until 0500, then northeast around 10 mph.
Smoke dispersal.....Poor.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........62  60  62  60  60  60  80  80  80  80  83  90
Weather cov.....CHC CHC CHC CHC CHC CHC LKY LKY LKY LKY LKY LKY
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RS  RS
Tstm cov........SCH SCH SCH
CWR.............10  10  10  10  10  10  30  30  30  30  30  30
Chc of pcpn (%).40  40  40  40  40  40  70  70  70  70  70  70
Chc of thdr (%).20  20  20  10  10  10  10  10  10  10  10  10
Temp............46  42  40  40  39  38  38  37  37  37  37  36
RH..............60  79  82  85  89  92  89  92  92  92  92  96
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  E   E   E   E
20 FT wind spd..5   3   3   3   3   2   2   2   2   2   2   2
20 FT wind gust.9   7   6   6       3   3   3   5   5   6   6
Mix hgt (kft)...1.4 1.2 0.9 0.7 1.0 0.5 0.6 0.7 1.2 0.7 0.7 1.5
Transp wind dir.SE  SE  E   SE  SE  SE  SE  SE  E   SE  E   NE
Transp wind spd.7   7   6   6   7   7   7   7   7   8   9   10
Vrate kt-ft/1K..9   7   5   4   6   3   3   4   8   5   6   13
SmokeDispersion.P   P   P   P   P   P   P   P   P   P   P   P

.WEDNESDAY...

Sky/weather.........Cloudy (85-95 percent). Rain showers likely
                    until 1200. Snow showers likely. Slight chance
                    of rain showers after 1200.
CWR.................51 percent.
Chance of pcpn......70 percent.
Chance of thunder...14 percent.
Max temperature.....Around 39.
Min humidity........85 percent.
Wind (20 ft)........Variable up to 5 mph until 0800, then east 5 to
                    8 mph.
Mixing height.......Below 1000 FT AGL until 0700, then 1700 ft AGL.
Transport winds.....East 8 to 13 mph.
Smoke dispersal.....Poor.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........95  95  91  92  95  96  91  94  95  90  94  84
Weather cov.....LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY
Weather type....RS  RW  RS  SW  SW  SW  SW  SW  SW  SW  SW  SW
Tstm cov........
CWR.............50  50  50  50  50  50  50  50  50  50  50  50
Chc of pcpn (%).70  70  70  70  70  70  60  60  60  60  60  60
Chc of thdr (%).10  10  10  10  10  10  10  10  10  10  10  10
Temp............36  35  34  35  37  38  37  37  37  38  37  36
RH..............96  96  96  100 96  92  92  92  92  85  89  85
20 FT wind dir..E   SE  E   E   E   E   E   E   E   E   E   E
20 FT wind spd..2   3   6   8   8   8   8   8   8   8   6   5
20 FT wind gust.7   8   12  15  15  15  14  15  15  15  13  12
Mix hgt (kft)...0.9 1.7 1.6 1.4 1.2 1.1 1.2 1.2 1.2 1.2 1.2 1.1
Transp wind dir.E   E   E   E   E   E   E   E   NE  E   E   E
Transp wind spd.10  12  12  12  10  9   10  10  10  9   8   8
Vrate kt-ft/1K..8   17  16  14  11  9   11  11  11  10  9   8
SmokeDispersion.P   P   P   P   P   P   P   P   P   P   P   P

$$
Forecaster...Pettett
Requested by...Fuels AFMO
Type of request...PRESCRIBED
.TAG 2623464.7/BOU
.DELDT 10/13/26
.FormatterVersion 2.0.0
.EMAIL jarred.gordon@usda.gov,jpapenfus@elkcreekfire.org