765
FNUS75 KGGW 291840
FWSGGW

Spot Forecast for Rattlesnake...BLM
National Weather Service Glasgow MT
1240 PM MDT Fri Aug 29 2025

Forecast is based on forecast start time of 1300 MDT on August 29.
If conditions become unrepresentative...contact the National Weather
Service at (406) 228-9622.

.DISCUSSION...
A push of monsoonal air from the southwest has aided in bringing
relative humidity values above 30 percent. There is moderate (50
percent) confidence of precipitation chances reaching Dawson
county after midnight, and isolated thunderstorms Saturday
afternoon. There is high (70 percent) confidence of wind speeds
remaining below 15 mph, and moderate (50 percent) confidence of
wind gusts remaining below 15 mph in the requested forecast
period.

.REST OF TODAY...

Sky/weather.........Mostly sunny (40-50 percent). Areas of smoke.
CWR.................2 percent.
Chance of thunder...4 percent.
Max temperature.....Around 80.
Min humidity........41 percent.
Wind (20 ft)........East winds around 7 mph.
Mixing height.......8500 ft AGL.
Transport winds.....East at 10 to 15 mph.

TIME (MDT)      1PM 2PM 3PM 4PM 5PM
Sky (%).........42  41  48  49  51
Weather cov.....    ARS ARS ARS ARS
Weather type....    SMK SMK SMK SMK
Tstm cov........
CWR.............0   0   0   0   0
Chc of thdr (%).0   0   0   0   0
Temp............79  80  80  80  80
RH..............43  41  41  41  41
20 FT wind dir..E   E   E   E   E
20 FT wind spd..7   10  10  10  9
20 FT wind gust.        10  8   8
Mix hgt (kft)...7.3 7.9 8.5 7.8 6.9
Transp wind dir.E   E   E   E   NE
Transp wind spd.9   11  13  15  13

.TONIGHT...

Sky/weather.........Partly cloudy (40-50 percent) then becoming
                    mostly cloudy (65-75 percent). Areas of smoke
                    early. Slight chance of rain showers after 2 am.
CWR.................5 percent.
Chance of thunder...11 percent.
Min temperature.....Around 58.
Max humidity........93 percent.
Wind (20 ft)........South southeast winds 6 to 11 mph.
Mixing height.......500 ft AGL.
Transport winds.....East southeast around 13 mph.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........47  58  68  58  55  51  62  71  79  80  84  87
Weather cov.....ARS ARS                             SCH SCH SCH
Weather type....SMK SMK                             RW  RW  RW
Tstm cov........
CWR.............0   0   0   0   0   0   10  10  10  10  10  10
Chc of thdr (%).10  10  10  0   10  10  10  10  10  10  10  10
Temp............78  78  75  70  67  66  64  63  62  60  60  58
RH..............41  43  50  59  64  68  73  76  78  84  86  90
20 FT wind dir..E   E   E   SE  SE  SE  S   SW  S   SE  SE  S
20 FT wind spd..8   8   10  10  10  8   6   4   4   4   3   3
20 FT wind gust.
Mix hgt (kft)...5.6 2.2 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.E   E   SE  SE  SE  S   S   S   S   S   S   S
Transp wind spd.11  12  12  13  12  9   7   8   7   7   6   5

.SATURDAY...

Sky/weather.........Mostly cloudy (65-75 percent). Slight chance of
                    rain showers in the morning, then chance of
                    rain showers and slight chance of thunderstorms
                    in the afternoon. Areas of smoke.
CWR.................5 percent increasing to 16 percent in the
                    afternoon.
Chance of thunder...24 percent.
Max temperature.....Around 78.
Min humidity........55 percent.
Wind (20 ft)........Winds variable around 5 to 10 mph.
Mixing height.......6400 ft AGL.
Transport winds.....Southeast at 10 to 15 mph.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........82  72  72  86  81  85  70  80  70  62  62  58
Weather cov.....SCH SCH SCH SCH SCH SCH         SCH CHC ARS SCH
Weather type....RW  RW  RW  RW  RW  RW          RW  RW  SMK RW
Tstm cov........                                SCH SCH SCH SCH
CWR.............10  10  10  10  10  10  20  20  20  20  20  20
Chc of thdr (%).0   0   0   10  10  10  10  10  20  20  20  20
Temp............58  58  61  64  69  72  74  75  76  76  77  76
RH..............91  93  87  77  70  62  58  55  55  55  55  56
20 FT wind dir..S   SE  SW  E   NE  N   NE  W   S   E   E   SE
20 FT wind spd..2   3   2   4   4   6   9   11  10  10  8   6
20 FT wind gust.                        10  10  10  10  10  10
Mix hgt (kft)...0.5 0.4 0.5 1.1 2.2 4.1 5.2 5.6 5.9 6.4 5.4 3.7
Transp wind dir.S   SE  E   NE  NE  NE  E   E   E   E   E   SE
Transp wind spd.5   5   3   5   7   8   11  15  13  12  10  12

$$
Forecaster...STOINSKI
Requested by...Kelsey
Type of request...WILDFIRE
.TAG 2520946.0/GGW
.DELDT 08/29/25
.FormatterVersion 2.0.0
.EMAIL mtmcc@firenet.gov