Spot Forecast
Issued by NWS Denver/Boulder, CO
Issued by NWS Denver/Boulder, CO
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FNUS75 KBOU 222036
FWSBOU
Spot Forecast for Allenspark...NPS
National Weather Service Denver/Boulder CO
136 PM MST Wed Jan 22 2025
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...
A couple of very weak disturbances will keep temperatures cool today
and Thursday, with partly to mostly cloudy skies and periods of breezy
west/northwest winds. These winds will be strongest Thursday evening
through Friday morning when gusts 35 to 50 mph are expected. There is
high confidence in the prevailing wind direction through the forecast
period, but low confidence on peak wind gust strength and timing of any
weakening on winds on Friday. Nonetheless, anticipate gradual weakening
through the afternoon Friday as a shallow front enters the plains ahead
of an incoming system.
This storm system will bring several inches of snow to the site between
Friday evening and Sunday.
Smoke dispersal conditions will be Good or better for several hours each
afternoon through Friday.
.REST OF TODAY...
Sky/weather.........Mostly cloudy. Slight chance (20%) of a snow shower.
Patchy blowing snow.
CWR.................3 percent.
Chance of pcpn......20 percent.
LAL.................1.
Max temperature.....Around 13.
Min humidity........44 percent.
Wind (20 ft)........Northwest winds 5-10 mph with gusts to 20 mph.
Mixing height.......5100 ft AGL until 1200, then 8300 ft AGL until
1600, then 5300 ft AGL until 1700, then 1600 ft
AGL.
Transport winds.....Northwest 24 to 29 mph until 1700, then around
18 mph.
Smoke dispersal.....Good until 1100, then very good until 1200,
then excellent until 1600, then very good until
1700, then poor.
Haines Index........4 or low potential for large plume dominated
fire growth.
TIME (MST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........57 56 54 53 59 49 39 30
Weather cov.....SCH SCH SCH SCH SCH PTY PTY PTY
Weather type....SN SN SN SN SN BSN BSN BSN
Tstm cov........
CWR.............5 5 5 5 5 0 0 0
Chc of pcpn (%).20 20 20 20 20 5 5 5
LAL.............1 1 1 1 1 1 1 1
Temp............12 13 15 14 13 13 11 8
RH..............48 46 44 45 47 46 47 52
20 FT wind dir..NW NW NW NW NW NW NW NW
20 FT wind spd..10 10 10 9 9 9 8 8
20 FT wind gust.21 20 19 18 16 16 15 15
Mix hgt (kft)...3.7 5.5 7.1 8.2 8.3 7.5 5.3 1.6
Transp wind dir.NW NW NW NW NW NW NW NW
Transp wind spd.24 26 26 28 26 28 28 18
Haines index....4 4 4 4 4 4 4 4
Vrate kt-ft/1K..78 127 162 197 190 179 127 26
SmokeDispersion.G VG E E E E VG P
.TONIGHT...
Sky/weather.........Partly cloudy (40-50%)
CWR.................0 percent.
Chance of pcpn......5 percent.
LAL.................1.
Min temperature.....Around 3 above.
Max humidity........55 percent.
Wind (20 ft)........West winds 8 to 14 mph.
Mixing height.......1300 ft AGL.
Transport winds.....West 17 to 23 mph.
Smoke dispersal.....Poor.
Haines Index........2 or very low potential for large plume
dominated fire growth.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........27 24 22 27 31 36 45 54 63 58 54 50
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).5 5 5 5 5 5 5 5 5 5 5 0
LAL.............1 1 1 1 1 1 1 1 1 1 1 1
Temp............7 6 6 5 5 5 5 5 6 5 5 5
RH..............52 51 51 51 51 51 51 51 49 50 52 52
20 FT wind dir..W W W W W W W W W W W W
20 FT wind spd..8 8 8 9 9 9 10 10 9 10 10 9
20 FT wind gust.16 18 18 18 16 15 16 16 15 16 16 15
Mix hgt (kft)...1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3
Transp wind dir.W W W W W W W W W W W W
Transp wind spd.17 22 22 22 21 21 21 22 23 22 23 23
Haines index....2 2 2 2 2 2 2 2 2 2 2 2
Vrate kt-ft/1K..20 24 24 24 23 23 23 24 25 24 25 25
SmokeDispersion.P P P P P P P P P P P P
.THURSDAY...
Sky/weather.........Partly cloudy (35-45 percent) until 1000, then
mostly sunny (15-25 percent). Patchy blowing
snow after 1000.
CWR.................1 percent.
Chance of pcpn......0 percent.
LAL.................1.
Max temperature.....Around 16.
Min humidity........43 percent.
Wind (20 ft)........West-northwest winds 8 to 15 mph with gusts to 20 mph in
the morning. Strengthening to 12 to 20 mph with gusts up to
27 mph in the afternoon.
Mixing height.......2600 ft AGL.
Transport winds.....West 22 to 27 mph.
Smoke dispersal.....Poor until 1000, then fair until 1100, then
good until 1500, then fair until 1600, then
poor.
Haines Index........2 or very low potential for large plume
dominated fire growth.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........45 46 43 29 22 20 18 16 14 14 14 15
Weather cov..... PTY PTY PTY PTY PTY PTY PTY PTY
Weather type.... BSN BSN BSN BSN BSN BSN BSN BSN
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0
LAL.............1 1 1 1 1 1 1 1 1 1 1 1
Temp............3 4 5 9 11 12 14 15 15 14 13 12
RH..............55 53 51 46 46 47 46 49 48 47 48 46
20 FT wind dir..W W W W W W W W W W W W
20 FT wind spd..12 13 14 15 17 18 19 20 20 20 20 20
20 FT wind gust.17 17 18 18 18 20 22 23 26 25 26 27
Mix hgt (kft)...1.3 1.3 1.3 1.7 2.1 2.7 2.8 2.9 3.0 2.4 1.9 1.3
Transp wind dir.W W W W W NW NW W W W W W
Transp wind spd.22 22 23 23 25 26 26 25 25 24 24 23
Haines index....2 2 2 2 2 2 2 2 2 2 2 2
Vrate kt-ft/1K..24 24 27 33 47 63 64 65 66 52 39 26
SmokeDispersion.P P P P F G G G G F P P
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...
Not as cold. Windy, especially before mid afternoon, with west-northwest
winds 20-25 mph and gusts up to 40 mph. Partly cloudy with a chance of
snow after 5pm. Highs in the upper 20s.
.SATURDAY...
Colder, with snow. Accumulating several inches. Lows around 10.
Highs around 14. North winds around 8 mph.
.SUNDAY...
Mostly cloudy with snow. Lows around 4. Highs in the lower 20s.
Variable winds less than 10 mph.
$$
Forecaster...Rodriguez
Requested by...Nathan Hallam
Type of request...PRESCRIBED
.TAG 2501067.0/BOU
.DELDT 01/22/25
.FormatterVersion 2.0.0
.EMAIL nathan_hallam@nps.gov