643
FNUS75 KBYZ 221406
FWSBYZ

Spot Forecast for French Creek...Forest Service
National Weather Service Billings MT
806 AM MDT Fri Aug 22 2025

Forecast is based on forecast start time of 0800 MDT on August 22.
If conditions become unrepresentative...contact the National Weather
Service.

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

.DISCUSSION...
Today will be seasonably cool with high humidity at the fire site.
A few light showers are possible before noon, but the greater
chance of showers and wet thunderstorms starts around 2pm and
continues into the early evening. A brief downpour is possible
with the showers, along with erratic wind gusts to 35 mph.
Otherwise, easterly surface winds will prevail. Look for a bit
warmer and drier conditions on Saturday.

.TODAY...

Sky/weather.........Partly sunny then becoming mostly cloudy.
                    Isolated showers after 10am, then scattered
                    showers and thunderstorms in the afternoon.
                    Erratic wind gusts possible near storms.
CWR.................20 percent.
Chance of lightning.30 percent.
Max temperature.....58-62.
Min humidity........69-73 percent.
Wind (20 ft)........
 Slope/valley.......Light and variable early, becoming northeast to
                    east 6-12 mph by late morning. Gusts to 18 mph
                    in the afternoon.
 Ridgetop...........West to northwest around 10 mph.
Mixing height.......Increasing to 2000 ft AGL in the afternoon.
Transport winds.....Northeast 12 mph.

TIME (MDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........50  53  58  66  82  92  85  90  82  90
Weather cov.....        ISO ISO ISO ISO SCT SCT SCT SCT
Weather type....    RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........                ISO ISO ISO SCT SCT SCT
Chc of ltng (%).4   6   8   10  15  20  20  25  30  30
Temp............52  53  57  58  60  59  58  56  57  58
RH..............85  80  78  74  71  79  84  88  85  79
20 FT wind dir..VRB NE  NE  NE  E   E   NE  NE  NE  NE
20 FT wind spd..3   5   6   7   9   10   9   7   7   6
20 FT wind gust.6   7   9   12  16  17  15  13  12  12

.TONIGHT...

Sky/weather.........Mostly cloudy with scattered showers and
                    isolated thunderstorms until sunset, then
                    becoming partly cloudy. Erratic wind gusts
                    possible near storms.
CWR.................15 percent.
Chance of lightning.25 percent.
Min temperature.....44-48.
Max humidity........Above 90 percent.
Wind (20 ft)........
 Slope/valley.......Northeast 6-12 mph early in the evening
                    becoming west 3-7 mph after sunset.
 Ridgetop...........Southwest to west around 10 mph.
Mixing height.......Decreasing to 300 ft AGL overnight.
Transport winds.....Northeast 10 mph becoming west 5 mph.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........86  88  86  87  86  86  74  66  52  43  47  34
Weather cov.....SCT SCT SCT ISO ISO ISO
Weather type....RW  RW  RW  RW  RW  RW
Tstm cov........ISO ISO ISO
Chc of ltng (%).25  20  15  10  10  5   5   0   0   0   0   0
Temp............59  57  57  54  53  52  50  48  47  47  46  46
RH..............78  80  85  88  85  90  92  90  83  80  75  73
20 FT wind dir..NE  NE  NE  N   N   NW  W   W   W   W   W   W
20 FT wind spd..7   6   6   5   4   3   3   3   3   3   4   5
20 FT wind gust.12  11  10  9   7   6   5   4   5   5   6   7

.SATURDAY...

Sky/weather.........Sunny. Scattered afternoon cumulus.
CWR.................0 percent.
Chance of lightning.5 percent.
Max temperature.....63-67.
Min humidity........54-58 percent.
Wind (20 ft)........
 Slope/valley.......Light and variable early, then east 6-12 mph
                    in the late morning and afternoon.
 Ridgetop...........West 5-10 mph.
Mixing height.......Increasing to 3500 ft AGL in the afternoon.
Transport winds.....East 8 mph.

TIME (MDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........31        13        22        50
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
Chc of ltng (%).0         0         0         5
Temp............47        52        60        65
RH..............72        65        59        56
20 FT wind......W 2G5     SE 4G7    E 7G10    E 9G12

$$
Forecaster...Lester
Requested by...Matthew Heinz
Type of request...WILDFIRE
.TAG 2520446.0/BYZ
.DELDT 08/22/25
.FormatterVersion 2.0.0
.EMAIL matthew.heinz@usda.gov