370
FNUS75 KRIW 250156
FWSRIW
SPOT FORECAST FOR IRON MTN PILES...BLM
NATIONAL WEATHER SERVICE RIVERTON WY
656 PM MST TUE FEB 24 2026
FORECAST IS BASED ON IGNITION TIME OF 1900 MST ON FEBRUARY 24.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE
..HIGH WIND WARNING IN EFFECT FROM 8 AM TO 5 PM MST WEDNESDAY
DISCUSSION
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
REST OF TONIGHT
ISOLATED RAIN SHOWERS THROUGH THE OVERNIGHT HOURS (10-20%) WITH
MINIMAL CHANCES (<10%) AFTER SUNRISE WEDNESDAY MORNING. CLOUDY
SKIES TONIGHT AND FOR MUCH OF TOMORROW. WESTERLY WINDS GUSTING UP
TO 20 TO 30 MPH OVERNIGHT BECOMING 30 TO 40 MPH AFTER SUNRISE.
AFTER NOON WEDNESDAY, EXPECT FREQUENT GUSTS OVER 45 TO 50 MPH
THROUGH SUNSET BEFORE DIMINISHING TO 20 TO 30 MPH GUSTS FOR
WEDNESDAY NIGHT. HIGH WIND WARNINGS ARE IN EFFECT FOR WEDNESDAY
FROM 8AM UNTIL 5PM. SMOKE DISPERSAL WILL BE GOOD TO EXCELLENT DUE
TO THE STRONG WINDS. MINIMUM RELATIVE HUMIDITY VALUES ABOVE THE
50 PERCENT MARK WITH AFTERNOON HIGH TEMPERATURES IN THE UPPER 40S
WEDNESDAY.
SKY/WEATHER.........CLOUDY (85-95 PERCENT). ISOLATED RAIN SHOWERS
LATE IN THE EVENING. ISOLATED RAIN SHOWERS
OVERNIGHT.
CWR.................0 PERCENT.
CHANCE OF PCPN......20 PERCENT.
CHANCE OF THUNDER...2 PERCENT.
MIN TEMPERATURE.....AROUND 35.
MAX HUMIDITY........89 PERCENT.
WIND (20 FT)........WEST WINDS 11 TO 14 MPH WITH GUSTS TO AROUND 20
MPH.
RIDGETOP WIND.......WEST AROUND 20 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTHWEST 18 TO 22 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........95 90 90 90 90 85 90 90 90 95 85
WEATHER COV..... ISO ISO ISO ISO ISO ISO
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).10 10 20 20 10 20 20 20 20 10 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0
TEMP............42 40 40 39 39 39 39 38 38 38 37
RH..............69 73 82 89 79 85 89 89 89 85 85
20 FT WIND DIR..NW W W W W W W W W W W
20 FT WIND SPD..14 12 12 11 11 12 12 13 13 13 13
20 FT WIND GUST.20 18 18 17 17 18 18 18 19 19 19
RIDGE WIND DIR..NW W W W W W W W W W W
RIDGE WIND SPD..20 20 20 20 20 20 20 20 20 20 20
MIX HGT (KFT)...0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.NW NW W W W W W NW NW W W
TRANSP WIND SPD.22 20 20 18 18 20 20 21 21 21 21
SDSPL KT-FT/10008 5 5 6 6 6 7 8 7 6 6
WEDNESDAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT) THEN BECOMING
MOSTLY SUNNY (35-45 PERCENT). ISOLATED RAIN
SHOWERS AND SNOW SHOWERS LATE IN THE AFTERNOON.
CWR.................1 PERCENT.
CHANCE OF PCPN......20 PERCENT.
CHANCE OF THUNDER...4 PERCENT.
MAX TEMPERATURE.....AROUND 47.
MIN HUMIDITY........52 PERCENT.
WIND (20 FT)........BREEZY. WEST WINDS 15 TO 24 MPH WITH GUSTS TO
AROUND 37 MPH UNTIL 1200, THEN NORTHWEST 26 TO
28 MPH WITH GUSTS TO AROUND 44 MPH.
RIDGETOP WIND.......WEST 25 TO 30 MPH UNTIL 1100, THEN NORTHWEST 35
TO 40 MPH.
MIXING HEIGHT.......1500 FT AGL UNTIL 1000, THEN 4000 FT AGL UNTIL
1200, THEN 5000 FT AGL UNTIL 1700, THEN 3000 FT
AGL.
TRANSPORT WINDS.....WEST 23 TO 32 MPH UNTIL 1100, THEN 39 TO 47
MPH.
SMOKE DISPERSAL.....POOR UNTIL 1000, THEN GOOD UNTIL 1100, THEN
VERY GOOD EARLY IN THE MORNING INCREASING TO
EXCELLENT IN THE AFTERNOON UNTIL 1300, THEN
EXCELLENT UNTIL 1600, THEN VERY GOOD EARLY IN
THE MORNING INCREASING TO EXCELLENT IN THE
AFTERNOON.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........80 75 75 70 55 55 55 30 25 30 55 50
WEATHER COV..... ISO
WEATHER TYPE.... RS
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).10 0 10 10 10 10 10 0 10 20 10 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............37 37 37 39 41 44 45 45 46 45 44 42
RH..............89 85 87 79 71 63 62 57 54 52 52 57
20 FT WIND DIR..W W W W W W W W W W NW NW
20 FT WIND SPD..16 15 17 20 22 24 26 27 28 28 28 28
20 FT WIND GUST.23 22 25 30 34 37 38 39 42 44 44 38
RIDGE WIND DIR..W W W W W W W W W W NW NW
RIDGE WIND SPD..25 25 25 30 30 35 35 40 40 40 40 40
MIX HGT (KFT)...0.5 0.5 0.5 1.5 2.5 4.0 4.5 5.0 5.0 4.5 4.0 3.0
TRANSP WIND DIR.W NW W W W W W W W W W NW
TRANSP WIND SPD.24 23 25 30 32 39 45 46 47 46 44 39
SDSPL KT-FT/10007 6 9 34 72 131 180 202 209 186 151 106
WEDNESDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......10 PERCENT.
CHANCE OF THUNDER...2 PERCENT.
MIN TEMPERATURE.....AROUND 28.
MAX HUMIDITY........76 PERCENT.
WIND (20 FT)........BREEZY. NORTHWEST WINDS 17 TO 26 MPH. GUSTS UP
TO 46 MPH DECREASING TO 36 MPH IN THE LATE
EVENING AND OVERNIGHT.
RIDGETOP WIND.......NORTHWEST 30 TO 35 MPH UNTIL 2400, THEN AROUND
25 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTHWEST 28 TO 37 MPH UNTIL 2400, THEN 25 TO
26 MPH.
SMOKE DISPERSAL.....FAIR EARLY IN THE EVENING DECREASING TO POOR
LATE IN THE NIGHT UNTIL 2100. POOR AFTER 2400.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........45 45 50 50 50 50 45 40 40 30 25 20
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).10 10 10 10 10 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............39 37 35 34 33 33 32 31 30 29 29 28
RH..............65 70 73 75 77 77 77 76 74 72 70 68
20 FT WIND DIR..NW NW NW NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..26 24 23 21 19 18 17 17 17 17 17 17
20 FT WIND GUST.37 35 32 30 29 26 26 26 26 25 25 24
RIDGE WIND DIR..NW NW NW NW NW NW NW NW NW NW NW NW
RIDGE WIND SPD..35 35 35 30 30 30 25 25 25 25 25 25
MIX HGT (KFT)...1.5 1.5 1.0 1.5 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.37 35 33 31 29 28 26 26 26 26 25 26
SDSPL KT-FT/100055 44 35 45 33 23 19 16 13 13 12 12
THURSDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 42.
MIN HUMIDITY........36 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 16 TO 19 MPH WITH GUSTS TO
AROUND 26 MPH.
RIDGETOP WIND.......NORTHWEST 25 TO 30 MPH.
MIXING HEIGHT.......2000 FT AGL UNTIL 1000, THEN 3500 FT AGL.
TRANSPORT WINDS.....NORTHWEST 26 TO 35 MPH.
SMOKE DISPERSAL.....POOR UNTIL 0800. GOOD EARLY IN THE MORNING
INCREASING TO VERY GOOD IN THE AFTERNOON AFTER
1000.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........20 25 25 25 20 15 15 15 10 10 10 10
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............28 29 30 32 34 37 39 41 42 42 42 40
RH..............67 66 64 59 52 46 41 38 36 35 35 38
20 FT WIND DIR..NW NW W W W W W W W W NW NW
20 FT WIND SPD..16 16 16 17 17 18 18 18 18 18 19 18
20 FT WIND GUST.23 23 23 24 25 26 26 26 26 26 26 25
RIDGE WIND DIR..NW NW W W W W W W W W NW NW
RIDGE WIND SPD..25 25 25 25 25 30 30 30 30 30 30 30
MIX HGT (KFT)...1.0 1.0 1.5 2.0 3.0 3.5 3.5 3.5 3.5 3.0 3.0 2.5
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.26 28 28 30 32 35 32 30 28 28 29 28
SDSPL KT-FT/100019 26 33 55 80 109 101 94 86 78 72 61
FORECAST DAYS 3 THROUGH 5
FRIDAY
MOSTLY CLEAR. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 40S. WEST
WINDS AROUND 12 MPH.
SATURDAY
PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS AROUND 50. WEST WINDS
AROUND 12 MPH.
SUNDAY
MOSTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS IN THE MID 30S.
HIGHS IN THE UPPER 40S. WEST WINDS AROUND 10 MPH.
FORECASTER...LOWE
REQUESTED BY...KALIE GLINES
TYPE OF REQUEST...PRESCRIBED
.TAG 2603895.0/RIW
.DELDT 02/24/26
.FORMATTERVERSION 2.0.0
.EMAIL KGLINES@BLM.GOV
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