Spot Forecast
Issued by NWS Denver/Boulder, CO
Issued by NWS Denver/Boulder, CO
544
FNUS75 KBOU 171313
FWSBOU
Spot Forecast for ACB Burn 24-001 Boyd Lake SP...OTHER
National Weather Service Denver/Boulder CO
713 AM MDT Tue Sep 17 2024
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...It`s best to have any planned burn completed by 1 pm
today as strong, gusty outflow winds are likely to develop with a
line of showers and thunderstorms this afternoon. Those showers
and storms are expected to arrive 230-4 pm, and then quickly push
east. A period of gusty winds to around 50 mph, possibly stronger,
along with brief rain can be expected. Before that, look for light
and variable winds to start early this morning, becoming
east/southeast and increasing to 10 to 15 mph by late morning
into early afternoon. Temperatures will be above normal with low
humidity readings before the showers and storms arrive.
Lighter winds, slightly cooler temperatures, but lower humidities
can be expected Wednesday.
.REST OF TODAY...
Sky/weather.........Partly cloudy (35-45 percent) until 1300, then
mostly cloudy (65-75 percent). Rain showers and
chance of thunderstorms after 1200.
CWR.................7 percent increasing to 27 percent in the
afternoon.
Chance of pcpn......80 percent.
LAL.................1 until 1300, then 3 until 1500, then 4.
Max temperature.....Around 87.
Min humidity........25 percent.
Wind (20 ft)........Breezy. Variable up to 5 mph until 1000, then
east around 5 mph until 1100, then around 8 mph
until 1200, then southeast around 12 mph until
1300, then south until 1400, then southwest
around 15 mph with gusts to around 25 mph until
1500, then 24 to 32 mph with gusts to around 41
mph until 1700, then around 20 mph with gusts
to around 31 mph. Gusty and erratic winds
expected near thunderstorms after 1200 until
1500Gusty and erratic winds expected near
thunderstorms after 1500.
Mixing height.......Below 1000 FT AGL until 1000, then 2400 ft AGL
until 1200, then 4400 ft AGL until 1300, then
9200 ft AGL until 1600, then 3700 ft AGL.
Transport winds.....Light winds until 1100, then southeast 8 to 16
mph until 1400, then south 23 to 28 mph until
1600, then southwest 20 to 28 mph.
Smoke dispersal.....Poor until 1300, then very good until 1400,
then excellent until 1600, then good until
1700, then poor.
Haines Index........4 or low potential for large plume dominated
fire growth.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........32 31 49 45 44 34 53 66 76 89 71
Weather cov..... SCH CHC CHC LKY DEF CHC
Weather type.... RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH CHC CHC CHC
CWR.............0 0 0 0 0 10 20 30 30 20 30
Chc of pcpn (%).0 0 0 10 10 10 30 50 60 80 50
LAL.............1 1 1 1 1 2 3 3 4 4 4
Temp............55 58 62 69 77 80 82 85 83 80 77
RH..............71 67 55 44 33 31 28 25 27 30 33
20 FT wind dir..NW N NE E E SE S SW SW SW SW
20 FT wind spd..3 2 2 5 8 12 12 15 28 28 20
20 FT wind gust.6 3 5 7 13 18 18 25 41 40 31
Mix hgt (kft)...0.5 0.5 0.7 1.6 2.4 4.4 7.7 9.6 8.7 4.0 2.3
Transp wind dir.NW NW N S SE S S S S W SW
Transp wind spd.5 3 3 6 8 12 16 23 28 28 20
Haines index....4 4 4 4 4 4 4 4 4 4 4
Vrate kt-ft/1K..2 1 2 8 12 35 108 192 208 92 32
SmokeDispersion.P P P P P P VG E E G P
.TONIGHT...
Sky/weather.........Mostly cloudy (50-60 percent) until 1900, then
mostly clear (15-25 percent).
CWR.................4 percent.
Chance of pcpn......10 percent.
LAL.................1.
Min temperature.....Around 45.
Max humidity........74 percent.
Wind (20 ft)........West winds 11 to 19 mph with gusts to around 26
mph until 2000, then 6 to 11 mph until 2400,
then 5 to 8 mph until 0300, then west 5 to 8
mph. Gusty and erratic winds expected near
thunderstorms until 2200.
Mixing height.......1600 ft AGL until 1900, then Below 1000 FT AGL.
Transport winds.....West 9 to 16 mph until 0100. Light after 0500.
Smoke dispersal.....Poor.
Haines Index........3 or very low potential for large plume
dominated fire growth.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........54 35 16 13 10 7 6 10 6 2 5 7
Weather cov.....SCH SCH
Weather type....RW RW
Tstm cov........SCH SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).10 10 10 10 10 10 0 0 0 0 0 0
LAL.............2 2 1 1 1 1 1 1 1 1 1 1
Temp............71 68 65 62 61 59 57 56 53 51 49 48
RH..............40 45 50 51 49 51 53 55 62 62 69 69
20 FT wind dir..W W W W W W SW W W W W W
20 FT wind spd..16 14 10 9 8 7 7 7 6 6 6 6
20 FT wind gust.26 22 17 15 13 12 12 10 9 9 8 8
Mix hgt (kft)...1.6 0.5 0.6 0.6 0.6 0.6 0.6 0.4 0.3 0.3 0.4 0.6
Transp wind dir.W W SW SW NW SW SW S SW SW W W
Transp wind spd.16 14 12 10 9 10 9 7 7 7 6 6
Haines index....3 3 3 3 3 3 3 3 3 3 3 3
Vrate kt-ft/1K..17 5 6 5 5 5 4 3 2 2 2 3
SmokeDispersion.P P P P P P P P P P P P
.WEDNESDAY...
Sky/weather.........Mostly sunny (5-15 percent) until 0700, then
partly cloudy (25-35 percent) until 1300, then
mostly sunny (15-25 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
LAL.................1.
Max temperature.....Around 82.
Min humidity........14 percent.
Wind (20 ft)........West winds 5 to 7 mph until 0800. South 5 to 13
mph after 0900.
Mixing height.......Below 1000 FT AGL until 1000, then 3600 ft AGL
until 1200, then 8300 ft AGL until 1700, then
4900 ft AGL.
Transport winds.....Southwest 8 to 9 mph until 0800. West 12 to 17
mph after 1300.
Smoke dispersal.....Poor until 1100, then fair until 1200, then
good until 1300, then very good until 1600,
then good until 1700, then fair.
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 (%).........9 28 30 32 31 30 29 25 22 18 19 17
Weather cov.....
Weather type....
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............47 46 50 54 62 67 73 77 79 81 81 81
RH..............72 74 64 53 38 29 23 20 16 15 14 15
20 FT wind dir..W W SW S S S S S S S S SW
20 FT wind spd..6 5 5 5 6 7 7 8 9 10 10 9
20 FT wind gust.9 7 7 7 9 12 12 13 15 16 16 15
Mix hgt (kft)...0.5 0.4 0.4 0.8 2.2 4.0 6.7 7.8 8.4 9.0 7.0 4.9
Transp wind dir.SW S S S SW SW SW SW W W W W
Transp wind spd.7 6 7 7 8 12 13 15 16 16 15 13
Haines index....5 5 5 5 5 5 5 5 5 5 5 5
Vrate kt-ft/1K..3 2 3 5 15 40 74 101 113 126 88 56
SmokeDispersion.P P P P P F G VG VG VG G F
.FORECAST DAYS 3 THROUGH 5...
.THURSDAY...
Mostly clear. Lows in the upper 40s. Highs in the mid 80s. West
winds around 7 mph.
.FRIDAY...
Mostly clear. Lows around 50. Highs in the lower 80s. North winds
around 7 mph.
.SATURDAY...
Cooler. Mostly cloudy with chance of showers and thunderstorms.
Lows in the lower 50s. Highs in the upper 60s. North winds around
11 mph.
$$
Forecaster...Barjenbruch
Requested by...John Sanfilippo
Type of request...PRESCRIBED
.TAG 2422520.1/BOU
.DELDT 09/17/24
.FormatterVersion 2.0.0
.EMAIL john.sanfilippo@state.co.us