Spot Forecast
Issued by NWS Denver/Boulder, CO
Issued by NWS Denver/Boulder, CO
055
FNUS75 KBOU 071102
FWSBOU
Spot Forecast for Green MTN RX...USFS
National Weather Service Denver/Boulder CO
502 AM MDT Fri Jun 7 2024
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...
Above normal temperatures and dry surface conditions are expected
today. Relative humidity values drop to 17-20 percent in the
afternoon. Winds start out this morning out of the southwest,
transition to northwest in the afternoon. Clouds increase in the
afternoon with scattered showers and thunderstorms developing with
increasing mid-level moisture and instability. 1-5 PM is a most
likely timeframe for showers and storms; however, given the nature
of the scattered coverage chances are less than 40%. Any nearby or
passing thunderstorms will carry the hazard of lightning and gusty
outflow winds up to 45 mph. Chance of wetting rain will be low.
Transport winds out of the west.
Saturday will be cooler with more moisture around. Showers and
thunderstorms are likely in the afternoon with an increased chance
for wetting rain.
.TODAY...
Sky/weather.........Mostly sunny (5-15 percent) until 1000, then
partly cloudy (30-40 percent) until 1200, then
mostly cloudy (60-70 percent). Slight chance of
rain showers and thunderstorms after 1200 until
1400, then chance of rain showers and
thunderstorms.
CWR.................7 percent.
Chance of pcpn......40 percent.
LAL.................1 until 1300, then 3 until 1400, then 4.
Max temperature.....Around 81.
Min humidity........17 percent.
Wind (20 ft)........Southwest winds 5 to 12 mph until 1000.
Northwest 7 to 12 mph after 1500. Gusty and
erratic winds expected near thunderstorms after
1200.
Mixing height.......Below 1000 FT AGL until 0800, then 1000 ft AGL
until 0900, then 4400 ft AGL until 1000, then
10800 ft AGL until 1200, then 13500 ft AGL
until 1600, then 9100 ft AGL.
Transport winds.....West 10 to 15 mph until 1000, then 20 to 25
mph.
Smoke dispersal.....Poor until 0900, then fair until 1000, then
excellent.
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 (%).........10 11 12 14 28 43 59 61 64 65 66 66
Weather cov..... SCH SCH CHC CHC CHC CHC
Weather type.... RW RW RW RW RW RW
Tstm cov........ SCH SCH CHC CHC CHC CHC
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
Chc of pcpn (%).0 0 0 0 0 0 10 20 30 40 40 30
LAL.............1 1 1 1 1 1 2 3 4 4 4 4
Temp............56 59 63 71 75 78 80 79 80 78 78 77
RH..............53 47 39 28 22 19 17 17 17 18 18 19
20 FT wind dir..SW SW SW W W W W W W NW W NW
20 FT wind spd..7 7 7 7 7 8 8 9 12 10 9 10
20 FT wind gust.12 12 12 12 12 13 13 15 18 16 16 16
Mix hgt (kft)...0.3 0.3 1.0 4.4 9.2 11 13 14 12 12 9.1 8.6
Transp wind dir.W W W W W W W W W W W W
Transp wind spd.12 10 12 15 21 22 22 24 23 24 22 21
Haines index....6 6 6 6 6 6 6 6 6 6 6 6
Vrate kt-ft/1K..3 3 10 57 165 215 255 291 248 256 172 155
SmokeDispersion.P P P F E E E E E E E E
.TONIGHT...
Sky/weather.........Mostly cloudy (50-60 percent) until 0100, then
partly cloudy (30-40 percent). Chance of
thunderstorms until 2100. Chance of rain
showers until 2400. Slight chance of
thunderstorms after 2100 until 2400.
CWR.................7 percent.
Chance of pcpn......30 percent.
LAL.................4 until 2100, then 3 until 2400, then 1.
Min temperature.....Around 55.
Max humidity........55 percent.
Wind (20 ft)........North winds 5 to 13 mph until 2000, then
northwest around 6 mph until 2100, then west 5
to 7 mph until 2300, then southwest until 0100,
then variable up to 5 mph until 0200, then
southwest around 5 mph until 0300, then
variable up to 5 mph until 0400, then southwest
5 to 7 mph. Gusty and erratic winds expected
near thunderstorms until 2100Gusty and erratic
winds expected near thunderstorms after 2100
until 2400.
Mixing height.......6900 ft AGL until 1900. Below 1000 FT AGL after
2000.
Transport winds.....Northwest 8 to 17 mph until 2200, then
southwest around 8 mph until 2300, then
northwest around 10 mph until 2400, then west
around 8 mph until 0100, then light until 0200,
then southwest 8 to 11 mph until 0400, then
west 8 to 9 mph.
Smoke dispersal.....Very good until 1900. Poor after 0100.
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 (%).........62 57 52 51 51 54 55 47 35 24 22 25
Weather cov.....CHC CHC CHC CHC CHC CHC
Weather type....RW RW RW RW RW RW
Tstm cov........CHC CHC CHC SCH SCH SCH
CWR.............10 10 10 10 10 10 0 0 0 0 0 0
Chc of pcpn (%).30 30 30 30 30 30 10 10 10 10 10 10
LAL.............4 4 4 3 3 3 1 1 1 1 1 1
Temp............76 73 68 64 64 61 61 59 58 57 56 56
RH..............21 25 32 35 37 41 42 47 49 51 51 51
20 FT wind dir..N N NW W W W SW SW SW SW SW SW
20 FT wind spd..8 7 6 5 5 5 5 3 5 3 5 5
20 FT wind gust.13 12 9 7 7 7 7 6 7 6 7 7
Mix hgt (kft)...6.9 3.7 0.8 0.4 0.3 0.3 0.3 0.3 0.2 0.2 0.2 0.2
Transp wind dir.W NW NW NW SW NW W W SW SW W W
Transp wind spd.17 13 10 8 8 10 8 7 8 8 7 6
Haines index....5 5 5 5 5 5 5 5 5 5 5 5
Vrate kt-ft/1K..104 41 7 3 2 3 2 2 2 2 2 1
SmokeDispersion.VG F P P P P P P P P P P
.SATURDAY...
Sky/weather.........Partly cloudy (35-45 percent) until 1100, then
mostly cloudy (65-75 percent). Chance of
thunderstorms after 1200 until 1500. Rain
showers after 1200. Thunderstorms likely after
1500.
CWR.................3 percent increasing to 60 percent in the
afternoon.
Chance of pcpn......80 percent.
LAL.................1 until 1200, then 4 until 1500, then 5.
Max temperature.....Around 73.
Min humidity........35 percent.
Wind (20 ft)........Variable up to 5 mph until 1000, then east 6 to
11 mph until 1400, then northeast 10 to 15 mph
until 1600, then 12 to 17 mph. Gusty and
erratic winds expected near thunderstorms after
0900 until 1500Gusty and erratic winds expected
near thunderstorms after 1500.
Mixing height.......Below 1000 FT AGL until 0800. 4500 ft AGL after
1100.
Transport winds.....West 8 to 9 mph until 0800, then 8 to 14 mph
until 1300, then southwest until 1400, then
southeast 11 to 16 mph until 1600, then east
around 14 mph until 1700, then north.
Smoke dispersal.....Poor until 1100, then fair until 1200, then
good until 1400, then fair until 1500, then
poor.
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 (%).........33 35 35 37 46 58 86 86 86 86 86 86
Weather cov..... SCH SCH SCH DEF DEF DEF DEF DEF DEF
Weather type.... RW RW RW RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH CHC CHC CHC LKY LKY LKY
CWR.............0 0 0 0 0 0 60 60 60 60 60 60
Chc of pcpn (%).10 10 10 10 10 10 80 80 80 80 80 80
LAL.............1 1 1 2 2 2 4 4 4 5 5 5
Temp............56 59 63 67 70 72 73 73 72 71 70 68
RH..............55 53 48 43 39 35 35 37 38 42 44 49
20 FT wind dir..W S SE E E E E E E NE NE NE
20 FT wind spd..2 1 2 3 6 7 9 10 10 14 14 14
20 FT wind gust.6 6 6 6 7 12 13 12 13 15 15 15
Mix hgt (kft)...0.2 0.8 1.4 2.0 3.6 5.2 6.9 5.9 4.9 3.9 3.4 2.9
Transp wind dir.W W W W W W W SW SE E E N
Transp wind spd.6 6 7 7 9 12 14 13 12 14 14 14
Haines index....5 5 5 5 5 5 5 5 5 5 5 5
Vrate kt-ft/1K..1 4 8 12 29 52 82 65 49 35 33 30
SmokeDispersion.P P P P P F G G F P P P
$$
Forecaster...Mensch
Requested by...John Hill
Type of request...PRESCRIBED
.TAG 2415471.7/BOU
.DELDT 06/07/24
.FormatterVersion 2.0.0
.EMAIL John.Hill@usda.gov