Spot Forecast
Issued by NWS Denver/Boulder, CO
Issued by NWS Denver/Boulder, CO
847
FNUS75 KBOU 191229
FWSBOU
Spot Forecast for Pearl...Larimer County Sheriffs Office
National Weather Service Denver/Boulder CO
629 AM MDT Thu Sep 19 2024
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...Mostly sunny skies and dry conditions will prevail
again today, but winds will be lighter than yesterday. Light
downslope winds this early this morning will see a little increase
and more persistent west to southwest winds during the day. There
is a chance (30%) that south or southeast facing slopes could
develop a more southerly flow this afternoon. Minimum humidities
will drop to around 16 to 17 percent since the airmass is very
dry, and temperatures will be several degrees above normal.
Winds will decrease and become light this evening, with moderate
humidity recovery overnight. Similar weather conditions can be
expected for Friday.
A storm system will move into the area this weekend, with rain
showers likely and a couple thunderstorms possible starting
Saturday afternoon or evening.
.TODAY...
Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....Around 64.
Min humidity........16 percent.
Wind (20 ft)........West winds 4 to 8 mph increasing to 6 to 12 mph
by 0900. Gusts up to 16 mph.
Mixing height.......Below 1000 FT AGL until 0900. 7100 ft AGL after
1100.
Transport winds.....West 14 to 22 mph.
Smoke dispersal.....Poor until 1000, then good until 1200, then
very good.
Haines Index........5 or moderate potential for large plume
dominated fire growth.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........0 0 0 0 2 3 5 4 4 3 5 7
Weather cov.....
Weather type....
Tstm cov........
CWR.............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............43 42 45 49 55 57 60 60 63 63 63 64
RH..............45 46 43 37 28 26 22 21 18 19 19 19
20 FT wind dir..W W W W W W W W W W W W
20 FT wind spd..5 5 7 8 10 10 10 10 10 10 9 7
20 FT wind gust.10 10 12 13 16 16 16 16 17 16 15 12
Mix hgt (kft)...0.4 0.4 0.5 1.9 3.7 4.9 6.1 6.6 6.8 7.3 7.1 7.0
Transp wind dir.W W W W W W W W W W W W
Transp wind spd.14 14 14 16 20 21 21 22 22 22 20 18
Haines index....5 5 5 5 5 5 5 5 5 5 5 5
Vrate kt-ft/1K..4 4 6 27 64 88 110 126 130 139 120 111
SmokeDispersion.P P P P G G VG VG VG VG VG VG
.TONIGHT...
Sky/weather.........Mostly clear (5-15 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....Around 42.
Max humidity........44 percent.
Wind (20 ft)........Southwest winds 5 to 7 mph until 2000, then
south until 2200, then southwest 5 to 8 mph
until 0300, then west 6 to 11 mph.
Mixing height.......5100 ft AGL until 1900, then Below 1000 FT AGL.
Transport winds.....Southwest around 13 mph until 1900, then around
8 mph until 2100, then 8 to 10 mph until 2300,
then light until 2400, then west 8 to 13 mph.
Smoke dispersal.....Fair until 1900, then poor.
Haines Index........5 or moderate potential for large plume
dominated fire growth.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........10 9 9 8 7 5 4 7 10 13 10 8
Weather cov.....
Weather type....
Tstm cov........
CWR.............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............62 59 55 51 49 48 47 46 46 44 44 44
RH..............22 26 31 34 37 38 39 40 39 39 40 40
20 FT wind dir..SW S S SW SW SW SW W W W W W
20 FT wind spd..6 5 5 6 6 6 7 7 7 8 8 9
20 FT wind gust.10 8 7 8 8 9 10 10 12 12 13 15
Mix hgt (kft)...5.1 0.6 0.3 0.3 0.3 0.3 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.SW SW S S SW SW W W W W W W
Transp wind spd.13 6 5 7 7 6 8 8 10 12 12 12
Haines index....5 5 5 5 5 5 5 5 5 5 5 5
Vrate kt-ft/1K..56 3 1 2 2 2 3 3 3 4 4 4
SmokeDispersion.F P P P P P P P P P P P
.FRIDAY...
Sky/weather.........Mostly sunny (5-15 percent).
CWR.................1 percent.
LAL.................1.
Max temperature.....Around 65.
Min humidity........20 percent.
Wind (20 ft)........Southwest winds 7 to 12 mph.
Mixing height.......Below 1000 FT AGL until 0900. 7800 ft AGL after
1100.
Transport winds.....West 12 to 21 mph until 1200, then southwest 17
to 22 mph.
Smoke dispersal.....Poor until 1000, then good until 1200, then
very good until 1500, then excellent until
1600, then very good until 1700, then good.
Haines Index........6 or high potential for large plume dominated
fire growth.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........6 5 2 3 1 3 7 9 10 10 13 15
Weather cov.....
Weather type....
Tstm cov........
CWR.............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............42 44 46 51 57 60 62 64 65 65 65 64
RH..............42 44 43 38 30 26 24 22 21 20 20 21
20 FT wind dir..W W SW SW SW SW SW SW SW SW SW SW
20 FT wind spd..9 9 9 9 9 9 10 10 10 9 9 8
20 FT wind gust.15 15 15 15 15 15 16 16 16 15 15 13
Mix hgt (kft)...0.4 0.4 0.4 1.7 4.0 5.5 7.0 7.5 8.0 8.6 7.5 6.5
Transp wind dir.W W W W W W SW SW SW SW SW W
Transp wind spd.12 14 13 16 20 21 22 22 21 21 18 17
Haines index....6 6 6 6 6 6 6 6 6 6 6 6
Vrate kt-ft/1K..4 4 5 24 68 99 132 140 147 154 123 95
SmokeDispersion.P P P P G G VG VG VG E VG G
.FORECAST DAYS 3 THROUGH 5...
.SATURDAY...
Cooler. Partly cloudy with chance of showers and slight chance of
thunderstorms. Lows in the lower 40s. Highs in the lower 50s.
Northwest winds around 9 mph. Rain likely Saturday night, possibly
mixed with snow late.
.SUNDAY...
Mostly cloudy with showers, snow showers likely and slight chance
of thunderstorms. Lows in the mid 30s. Highs in the mid 40s.
Northeast winds around 8 mph.
.MONDAY...
Partly cloudy with slight chance of showers and thunderstorms.
Lows in the upper 30s. Highs in the mid 50s. Southwest winds
around 12 mph.
$$
Forecaster...Barjenbruch
Requested by...SGT Derek Rosenquist
Type of request...WILDFIRE
.TAG 2422609.6/BOU
.DELDT 09/18/24
.FormatterVersion 2.0.0
.EMAIL luke.finn@usda.gov,rosenqdc@co.larimer.co.us