551
FNUS75 KMSO 212344
FWSMSO
SPOT FORECAST FOR 2025 LINCOLN COUNTY FLOOD INCIDENT
NATIONAL WEATHER SERVICE MISSOULA MT
444 PM MST SUN DEC 21 2025
FORECAST IS BASED ON FORECAST START TIME OF 1900 MST ON DECEMBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
LIGHT SNOW WILL OVERSPREAD THE AREA TONIGHT MIXING
WITH RAIN BY EARLY MONDAY MORNING. GENERAL ACCUMULATIONS AROUND 1
INCH, LOCALIZED 2 INCHES. WATCH FOR BLACK ICE FORMATION ON WET
ROADS. PRECIPITATION DIMINISHES ON MONDAY MORNING WITH SCATTERED
RAIN/SNOW SHOWERS AT TIMES THROUGH TUESDAY BUT WITH LIMITED
FURTHER ACCUMULATIONS.
WINDS WILL BE LIGHT ASIDE FROM MONDAY LATE MORNING/AFTERNOON WHEN
GUSTS TO 20 MPH MAY OCCUR FOR A FEW HOURS, ESPECIALLY JUST ABOVE
THE VALLEY FLOOR.
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. PATCHY FOG EARLY IN THE
EVENING, THEN AREAS OF FOG LATE IN THE EVENING. SNOW BECOMING LIKELY
IN THE EVENING, THEN RAIN AND SNOW OVERNIGHT.
* CHANCE OF PRECIP....90 PERCENT.
* CHANCE LIGHTNING....UP TO 10 PERCENT.
* MIN TEMPERATURE.....28-33.
* MAX HUMIDITY........95-100 PERCENT.
* WIND (20 FT)........VARIABLE 1-3 MPH.
* PRECIP AMOUNT.......0.15 INCHES.
TIME (MST) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........86 86 82 86 80 81 85 94 82 73 80
WEATHER COV.....PTY PTY ARS CHC LKY CHC LKY DEF LKY CHC LKY
WEATHER TYPE....FOG FOG FOG SN SN RS RS RS RS RS RN
TSTM COV........
CHC OF PCPN (%).0 10 10 50 60 50 70 90 70 40 60
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 10
TEMP............32 30 30 30 30 30 31 31 32 31 32
RH..............91 92 94 96 100 100 99 100 100 100 100
SURFACE WND DIR.N N N N SE S S E NE N NE
SURFACE WND SPD.0 0 0 0 1 1 1 1 1 2 2
SURFACE WND GST.5 5 5 5 5 5 5 5 5
MONDAY
* SKY/WEATHER.........PARTLY CLOUDY. PATCHY FOG IN THE MORNING.
CHANCE OF RAIN AND SNOW EARLY IN THE MORNING, THEN SLIGHT
CHANCE OF RAIN AND SNOW LATE IN THE MORNING.
* CHANCE OF PRECIP....40 PERCENT.
* CHANCE LIGHTNING....UP TO 10 PERCENT.
* MAX TEMPERATURE.....38-43.
* MIN HUMIDITY........67-72 PERCENT.
* WIND (20 FT)........VARIABLE 1-3 MPH BECOMING SOUTHWEST 3-7 MPH
WITH GUSTS TO 20 MPH LATE MORNING/AFTERNOON.
* PRECIP AMOUNT.......0.08 INCHES.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........80 80 80 80 80 49 49 49 35 48 48 41
WEATHER COV.....CHC CHC CHC SCH SCH
WEATHER TYPE....RN RN RS RNF RNF
TSTM COV........
CHC OF PCPN (%).40 30 30 20 20 10 10 10 10 10 10 10
CHC OF LTNG (%).10 10 10 10 10 0 0 0 0 0 0 0
TEMP............32 32 32 31 33 35 37 39 38 38 37 33
RH..............100 96 95 97 95 89 84 76 74 75 78 84
SURFACE WND DIR.NE E S SW SW S S S S S SE E
SURFACE WND SPD.2 2 1 2 2 5 6 6 5 1 1 1
SURFACE WND GST.5 5 10 10 10 15 20 20 15 10 5 5
MONDAY NIGHT
* SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING CLOUDY. PATCHY
FOG IN THE LATE EVENING AND OVERNIGHT. CHANCE OF RAIN AND SNOW
LATE IN THE EVENING AND OVERNIGHT.
* CHANCE OF PRECIP....30 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MIN TEMPERATURE.....26-31.
* MAX HUMIDITY........91-96 PERCENT.
* WIND (20 FT)........VARIABLE 1-3 MPH.
* PRECIP AMOUNT.......0.02 INCHES.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........41 41 51 51 51 62 62 62 77 77 77 88
WEATHER COV..... PTY PTY CHC CHC CHC CHC CHC CHC CHC
WEATHER TYPE.... FOG FOG RS SN SN RS SN SN RS
TSTM COV........
CHC OF PCPN (%).10 10 10 10 10 30 30 30 30 30 30 30
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............31 30 29 28 28 29 29 29 29 29 29 29
RH..............89 93 94 95 96 96 95 94 94 95 97 98
SURFACE WND DIR.E E SE SE SE SE SE SE SE SE SE S
SURFACE WND SPD.1 1 1 1 1 1 1 1 1 1 1 1
SURFACE WND GST.5 5 5 5 5 5 5 5 5 5 5 5
TUESDAY
* SKY/WEATHER.........MOSTLY CLOUDY. PATCHY FOG EARLY IN THE
MORNING. CHANCE OF SNOW AND RAIN IN THE MORNING, THEN CHANCE OF
RAIN LATE IN THE AFTERNOON.
* CHANCE OF PRECIP....40 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MAX TEMPERATURE.....39-44.
* MIN HUMIDITY........74-79 PERCENT.
* WIND (20 FT)........VARIABLE 1-5 MPH.
* PRECIP AMOUNT.......0.01 INCHES.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........88 88 86 86 86 81 81 81 79 79 79 85
WEATHER COV.....CHC CHC CHC CHC CHC CHC
WEATHER TYPE....SN SN RS SN RS RN
TSTM COV........
CHC OF PCPN (%).30 30 30 40 30 10 10 10 10 10 10 40
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............29 29 29 30 32 35 37 39 40 40 39 37
RH..............98 98 97 96 95 93 89 84 81 82 85 89
SURFACE WND DIR.S S S S S S S S N N N N
SURFACE WND SPD.1 1 1 1 1 1 1 1 0 0 0 0
SURFACE WND GST.5 5 5 5 5 5 5 5 5 5 5 5
FORECASTER...BOOTH
REQUESTED BY...VICKI STEPHENS
TYPE OF REQUEST...OTHER
.TAG 2527597.8/MSO
.DELDT 12/21/25
.FORMATTERVERSION 2.0.0
.EMAIL VICKI.STEPHENS@MT.GOV
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