673
FNUS75 KTFX 232344
FWSTFX

Spot Forecast for Heath Project...Lewistown Fire Rescue
National Weather Service Great Falls MT
544 PM MDT Mon Sep 23 2024

Forecast is based on ignition time of 1800 MDT on September 24.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

It will be dry Tuesday night through Wednesday night with moderate
humidity recovery. Winds will be 10 - 15 mph with gusts up to 20
mph Tuesday night through Wednesday night. The strongest winds
will be Wednesday afternoon and evening. On Wednesday it will be
warm with temperatures in the mid to upper 80s with humidity
values as low as 20%.


.TUESDAY NIGHT...

Sky/weather.........Mostly clear (5-15 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....51-56.
Max humidity........58-63 percent.
Wind (20 ft)........
 Slope/valley.......Southeast winds 5 to 10 mph.
Mixing height.......500 ft AGL.
Transport winds.....South 5 to 10 mph.
Haines Index........

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........17  17  17  5   5   5   5   5   5   6   6   6
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............76  73  69  63  61  59  58  58  57  56  55  54
RH..............45  52  56  60  63  63  61  60  60  60  61  62
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..5   5   5   10  10  10  10  10  10  10  10  10
20 FT wind gust.10  10  15  15  15  15  15  15  15  15  15  15
Mix hgt (kft)...1.0 0.5 0.5 1.0 1.0 1.0 1.0 1.0 0.5 0.5 0.5 0.5
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   S
Transp wind spd.5   5   10  10  10  10  10  10  10  10  10  10
Haines index....3   3   3   M   M   M   M   M   M   M   M   M

.WEDNESDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....84-89.
Min humidity........20-25 percent.
Wind (20 ft)........
 Slope/valley.......South winds around 10 mph shifting to the
                    southwest in the afternoon.
Mixing height.......6500 ft AGL.
Transport winds.....Southwest 10 to 15 mph shifting to the west 15
                    to 20 mph in the afternoon.
Haines Index........4 or low potential for large plume dominated
                    fire growth early in the morning.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........6   6   6   5   5   5   3   3   3   3   3   3
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............54  55  58  62  69  75  81  84  85  85  85  83
RH..............62  60  57  52  45  36  29  25  24  24  25  29
20 FT wind dir..SE  SE  SE  S   S   S   SW  SW  SW  SW  SW  SW
20 FT wind spd..10  10  10  10  10  10  10  10  10  10  10  10
20 FT wind gust.15  15  15  15  15  15  20  20  20  20  20  20
Mix hgt (kft)...1.0 0.5 0.5 1.0 1.5 2.5 3.5 5.0 6.5 6.5 5.5 3.5
Transp wind dir.SW  SW  S   S   SW  SW  W   W   W   W   W   SW
Transp wind spd.10  10  10  15  15  15  15  20  20  20  15  15
Haines index....M   M   4   4   4   4   4   4   4   4   4   4

.WEDNESDAY NIGHT...

Sky/weather.........Mostly clear (15-25 percent).
CWR.................0 percent.
LAL.................1.
Min temperature.....50-55.
Max humidity........53-58 percent.
Wind (20 ft)........
 Slope/valley.......South winds 5 to 10 mph.
Mixing height.......1000 ft AGL.
Transport winds.....South 10 to 15 mph shifting to the west early
                    in the morning.
Haines Index........

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........3   3   3   9   9   9   32  32  32  32  32  32
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............80  76  72  66  65  64  64  63  61  59  56  54
RH..............32  36  40  45  45  44  42  41  42  43  47  52
20 FT wind dir..SW  SW  SW  S   S   S   S   S   S   SW  SW  SW
20 FT wind spd..5   5   5   10  10  10  10  10  10  10  10  10
20 FT wind gust.15  15  15  15  15  15  20  20  20  15  15  15
Mix hgt (kft)...1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
Transp wind dir.SW  SW  S   S   S   S   SW  SW  SW  SW  W   W
Transp wind spd.10  10  10  15  15  15  20  20  20  20  15  15
Haines index....4   4   4   M   M   M   M   M   M   M   M   M

$$
Forecaster...Gesell
Requested by...James Jensen
Type of request...PRESCRIBED
.TAG 2422932.0/TFX
.DELDT 09/23/24
.FormatterVersion 2.0.0
.EMAIL jjensen@ci.lewistown.mt.us, tfx.ops@noaa.gov