935
FNUS75 KBYZ 231653
FWSBYZ

Spot Forecast for Highline RX...BLM
National Weather Service Billings MT
1053 AM MDT Wed Apr 23 2025

Forecast is based on ignition time of 0800 MDT on April 26.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office if you have questions
or concerns with this forecast.

.DISCUSSION...

Saturday into Sunday will see warm and dry conditions.
Sunday afternoon into evening will see a system move into the
region bringing the potential for significant precipitation. There
is a 50% chance for greater than 0.5 inches of precipitation.
There remains a lot of uncertainty with this system.
Torgerson

.SATURDAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
Chance of lightning.10 percent.
Max temperature.....72-76.
Min humidity........28-32 percent.
Wind (20 ft)........
 Slope/valley.......South winds 14 to 18 mph with gusts to around 30
                    mph in the morning decreasing to 8 to 12 mph
gusting to 15 to 20 mph by late afternoon.
 Ridgetop...........South around 30 mph in the morning becoming north
20 mph by late afternoon.
Mixing height.......Increasing to 6600 ft AGL in the afternoon.
Transport winds.....South 18 to 22 mph early in the morning becoming
northwest 10 to 12 mph.

TIME (MDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........64  51  51  51  36  36  36  29  29  29
Weather cov.....
Weather type....
Tstm cov........
Chc of ltng (%).0   0   0   0   10  10  10  10  10  10
Temp............51  54  58  61  65  68  71  72  74  74
RH..............77  71  63  55  47  41  37  34  31  29
20 FT wind dir..S   S   S   S   S   S   S   S   S   S
20 FT wind spd..16  16  16  16  12  12  12  10  10  10
20 FT wind gust.30  30  30  30  19  19  19  18  18  18

.SATURDAY NIGHT...

Sky/weather.........Partly cloudy.
CWR.................0.
Chance of lightning.10 percent.
Min temperature.....45-49.
Max humidity........80-84 percent.
Wind (20 ft)........
 Slope/valley.......South winds becoming northwest 6 to 8 mph gusting
10 to 14 mph.
 Ridgetop...........Northwest becoming southwest 15 mph.
Mixing height.......Decreasing to 500 ft in the early morning.
Transport winds.....Southwest 8 to 12 mph.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........42  42  42  50  50  50  46  46  46  45  45  45
Weather cov.....
Weather type....
Tstm cov........
Chc of ltng (%).10  10  10  10  10  10  0   0   0   0   0   0
Temp............73  70  65  61  58  56  54  52  51  50  49  48
RH..............30  35  43  51  57  63  68  72  75  77  80  82
20 FT wind dir..S   S   S   S   S   SW  SW  SW  SW   W   NW  NW
20 FT wind spd..8   8   8   8   8   8   8   8   8   7   7   7
20 FT wind gust.14  14  14  14  14  14  13  13  13  12  12  12

.SUNDAY...

Sky/weather.........Cloudy. Chance of rain showers and slight
                    chance of thunderstorms in the afternoon.
CWR.................20.
Chance of lightning.20 percent.
Max temperature.....70-74.
Min humidity........28-32 percent.
Wind (20 ft)........
 Slope/valley.......Southwest winds 5 to 10 mph. Gusts up to 21 mph
                    late in the afternoon. Gusty and erratic winds
                    expected near thunderstorms in the afternoon.
 Ridgetop...........Southwest 15 mph.
Mixing height.......Increasing to 9,200 ft in the late afternoon.
Transport winds.....Southwest 10 to 15 mph.

TIME (MDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........59        61        57        67
Weather cov.....                    CHANCE    CHANCE
Weather type....NONE      NONE      RNSHWR    RNSHWR
Tstm cov........                    S CHC     S CHC
Chc of ltng (%).0         0         20        20
Temp............48        55        69        72
RH..............81        63        37        29
20 FT wind......S 7G12    SW 8G14   SW 9G14   W 10G17

$$
Forecaster...Arthur/Torgerson
Requested by...Rusty Butler
Type of request...PRESCRIBED
.TAG 2511542.0/BYZ
.DELDT 04/23/25
.FormatterVersion 2.0.0
.EMAIL rbutler@blm.gov