651
FNUS75 KTFX 311109
FWSTFX

Spot Forecast for Jericho Creek Fire...USFS
National Weather Service Great Falls MT
509 AM MDT Sun May 31 2026

Forecast is based on forecast start time of 0600 MDT on May 31.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Periods of rain/cool today. Snow could mix at times this morning.
It is looking like the rain will continue into Monday morning,
before diminishing Monday afternoon. Temperatures warm by late
this week, but also expect another chance for
showers/thunderstorms by Thu as well.

.TODAY...

Sky/weather.........Cloudy (85-95 percent). Snow in the morning.
                    Rain through the day. Areas of fog.
CWR.................70 percent.
Chance of thunder...11 percent.
Max temperature.....42-47.
Min humidity........93-98 percent.
Wind (20 ft)........
 Slope/valley.......West winds 10 to 15 mph.
 Ridgetop...........West 15 to 20 mph.
Mixing height.......2500 ft AGL.
Transport winds.....West 20 to 25 mph.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........96  97  94  91  89  92  93  94  90  87  90  87
Weather cov.....LKY DEF DEF LKY LKY LKY DEF DEF DEF DEF LKY LKY
Weather type....RN  RN  RS  RN  RS  RN  RN  RN  RN  RN  RN  RN
Tstm cov........
CWR.............70  70  70  70  70  70  20  20  20  20  20  20
Chc of thdr (%).0   0   0   0   0   0   10  10  10  10  10  10
Temp............39  37  37  38  40  40  41  42  43  44  43  43
RH..............98  98  100 100 100 100 100 100 100 100 100 99
20 FT wind dir..W   W   W   W   W   W   W   W   W   W   W   W
20 FT wind spd..15  15  15  15  15  15  15  15  15  15  15  10
20 FT wind gust.25  25  25  25  25  25  20  20  20  20  20  20
Ridge wind dir..W   W   W   W   W   W   W   W   W   W   W   NW
Ridge wind spd..20  20  20  20  20  20  20  20  20  20  15  15
Mix hgt (kft)...1.5 1.5 1.5 1.5 1.5 1.5 2.0 2.0 2.0 2.0 2.5 2.5
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.20  20  20  20  20  20  20  20  20  25  20  20

.TONIGHT...

Sky/weather.........Cloudy (85-95 percent). Rain likely.
CWR.................20 percent.
Chance of thunder...6 percent.
Min temperature.....32-37.
Max humidity........95-100 percent.
Wind (20 ft)........
 Slope/valley.......West winds 5 to 10 mph.
 Ridgetop...........Northwest 15 to 20 mph becoming west 5 to 10
                    mph overnight.
Mixing height.......1000 ft AGL.
Transport winds.....West 15 to 20 mph decreasing to around 10 mph
                    late in the evening.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........92  89  95  97  93  87  81  80  79  79  80  83
Weather cov.....LKY LKY LKY CHC CHC CHC LKY CHC CHC CHC CHC LKY
Weather type....RN  RN  RN  RN  RN  RN  RN  RN  RN  RN  RN  RN
Tstm cov........
CWR.............10  10  10  10  10  10  20  20  20  20  20  20
Chc of thdr (%).10  10  10  0   0   0   0   0   0   0   0   0
Temp............42  42  41  41  39  39  39  39  38  38  38  37
RH..............99  98  99  100 100 100 99  96  97  95  97  96
20 FT wind dir..W   W   W   W   W   W   W   W   W   W   W   W
20 FT wind spd..10  10  10  10  5   5   5   5   5   5   5   5
20 FT wind gust.20  20  20  15  15  10  10  10  10  10  10  10
Ridge wind dir..NW  NW  W   W   W   NW  NW  NW  W   W   W   W
Ridge wind spd..15  15  15  20  15  15  15  15  10  10  5   5
Mix hgt (kft)...2.5 2.0 2.0 1.5 1.5 1.5 1.0 1.5 1.5 1.5 1.0 1.0
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.20  20  15  15  15  10  10  10  10  10  10  10

.MONDAY...

Sky/weather.........Mostly cloudy (70-80 percent). Chance of rain
                    through the day. Slight chance of thunderstorms
                    late in the afternoon.
CWR.................10 percent.
Chance of thunder...22 percent.
Max temperature.....48-53.
Min humidity........65-70 percent.
Wind (20 ft)........
 Slope/valley.......West winds 5 to 10 mph. Gusty and erratic winds
                    expected near thunderstorms late in the
                    afternoon.
 Ridgetop...........West around 5 mph shifting to the south 0 to 5
                    mph early in the morning, then shifting to the
                    west early in the afternoon shifting to the
                    northwest late in the afternoon.
Mixing height.......5000 ft AGL.
Transport winds.....West 10 to 15 mph.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........84  84  84  68  68  68  74  74  74  71  71  71
Weather cov.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
Weather type....RN  RN  RN  RN  RN  RN  RN  RN  RN  RN  RN  RN
Tstm cov........                                    SCH SCH SCH
CWR.............10  10  10  10  10  10  10  10  10  10  10  10
Chc of thdr (%).0   0   0   0   0   0   10  10  10  20  20  20
Temp............37  37  35  38  41  43  44  45  47  48  48  50
RH..............94  92  94  91  91  87  84  81  78  74  70  70
20 FT wind dir..W   W   W   W   W   W   W   W   W   NW  NW  NW
20 FT wind spd..5   5   5   5   5   5   5   5   5   10  10  10
20 FT wind gust.10  10  10  15  15  15  15  15  15  15  15  15
Ridge wind dir..W   W   S   S   S   SW  SW  SW  W   W   NW  NW
Ridge wind spd..5   5   0   0   5   5   5   10  10  10  15  10
Mix hgt (kft)...1.0 1.5 2.0 2.0 3.0 3.5 4.0 2.5 2.5 5.0 2.5 2.5
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.10  10  10  10  10  10  10  10  10  15  15  15

$$
Forecaster...Brusda
Requested by...Jake Fitzgerald
Type of request...WILDFIRE
.TAG 2613863.14/TFX
.DELDT 05/31/26
.FormatterVersion 2.0.0
.EMAIL jake.fitzgerald@usda.gov,MTHDC@firenet.gov,samuel.adams2@usda.gov,AASHDALE@lccountymt.gov,scott.nelson@dnr.wa.gov