Spot Forecast
Issued by NWS Glasgow, MT
Issued by NWS Glasgow, MT
497
FNUS75 KGGW 211434
FWSGGW
Spot Forecast for Upper Tomato Can RX...BLM
National Weather Service Glasgow MT
834 AM MDT Tue Apr 21 2026
Forecast is based on ignition time of 0800 MDT on April 21.
If conditions become unrepresentative...contact the National Weather
Service at (406) 228-9622.
.DISCUSSION...
Winds should be increasing slightly from the west, peaking this
afternoon then becoming east early this evening about 7 pm. Winds
this afternoon could temporarily get around 15 mph, about 2 pm.
Windier conditions are expected Wednesday.
.REST OF TODAY...
Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Max temperature.....Around 80.
Min humidity........21 percent.
Wind (20 ft)........Light winds becoming west 5 to 7 mph in the
late morning and afternoon.
Mixing height.......7500 ft AGL.
Transport winds.....West 8 to 17 mph.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........6 11 17 0 0 0 0 0 0 0
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0
Temp............47 55 62 67 72 76 77 79 80 78
RH..............63 52 41 36 29 26 23 22 21 21
20 FT wind dir..NW W W W W W W W W W
20 FT wind spd..2 4 5 6 7 7 7 7 7 6
20 FT wind gust. 5 6 8 10 11 11 12 10 8
Mix hgt (kft)...0.4 0.6 1.4 2.6 4.6 6.4 7.0 7.2 7.5 7.5
Transp wind dir.W W W W W W W W W W
Transp wind spd.8 10 12 14 16 17 17 15 13 12
.TONIGHT...
Sky/weather.........Mostly clear (20-30 percent) then becoming
cloudy (85-95 percent).
CWR.................2 percent.
Min temperature.....Around 50.
Max humidity........53 percent.
Wind (20 ft)........Northwest winds around 6 mph early in the
evening becoming light, then becoming east 5 to
14 mph with gusts to around 20 mph early in the
evening.
Mixing height.......400 ft AGL.
Transport winds.....West around 9 mph shifting to the south around
3 mph early in the evening, then shifting to
the east 6 to 10 mph early in the evening
increasing to 17 to 25 mph in the late evening
and overnight.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........0 0 12 46 75 92 100 100 96 100 100 91
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............77 74 66 61 59 57 55 55 55 53 53 52
RH..............21 27 33 38 42 46 48 51 51 52 53 53
20 FT wind dir..NW E E E E E E E E E E SE
20 FT wind spd..6 3 5 6 8 10 12 13 13 13 13 14
20 FT wind gust.7 5 6 10 11 14 18 19 20 19 19 20
Mix hgt (kft)...7.0 2.0 0.8 0.4 0.4 0.5 0.6 0.6 0.7 0.6 0.6 0.6
Transp wind dir.W S E E E E E E SE SE SE SE
Transp wind spd.9 3 6 10 17 23 23 23 25 24 24 24
.WEDNESDAY...
Sky/weather.........Cloudy (90-100 percent) then becoming partly
sunny (45-55 percent). Slight chance of rain
showers in the afternoon.
CWR.................7 percent.
Max temperature.....Around 81.
Min humidity........25 percent.
Wind (20 ft)........East winds 11 to 14 mph shifting to the south
around 10 mph late in the afternoon.
Mixing height.......5100 ft AGL.
Transport winds.....Southeast 15 to 24 mph shifting to the south
around 14 mph early in the afternoon, then
shifting to the southwest around 13 mph late in
the afternoon.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........99 99 99 93 93 93 69 69 69 35 35 35
Weather cov..... SCH SCH SCH SCH SCH SCH
Weather type.... RW RW RW RW RW RW
Tstm cov........
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
Temp............51 53 55 58 64 69 73 76 78 79 80 78
RH..............53 53 49 45 41 36 31 29 27 26 24 24
20 FT wind dir..E E E E E E SE SE SE S S S
20 FT wind spd..14 14 14 14 14 14 11 11 11 10 10 10
20 FT wind gust.18 18 18 18 18 18 14 14 14 14 14 14
Mix hgt (kft)...0.6 0.6 0.7 0.8 1.5 2.2 3.0 3.7 4.4 5.1 5.0 4.9
Transp wind dir.SE E SE SE SE SE SE S SW SW SW SW
Transp wind spd.24 21 21 22 21 17 15 14 14 13 13 13
$$
Forecaster...JAMBA
Requested by...Jeff Barnes
Type of request...PRESCRIBED
.TAG 2611002.0/GGW
.DELDT 04/21/26
.FormatterVersion 2.0.0
.EMAIL jkbarnes@blm.gov