565
FNUS75 KMSO 190018
FWSMSO
SPOT FORECAST FOR 2025 LINCOLN COUNTY FLOOD INCIDENT
NATIONAL WEATHER SERVICE MISSOULA MT
518 PM MST THU DEC 18 2025
FORECAST IS BASED ON FORECAST START TIME OF 1800 MST ON DECEMBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
...WIND ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 8 AM MST
FRIDAY...
DISCUSSION
WIND GUSTS TONIGHT HAVE AN 80% PROBABILITY OF
EXCEEDING 40 MPH BEFORE 6 AM, WITH LESS THAN 20% OF EXCEEDING 50
MPH. WINDS WILL SLOWLY DECREASE THROUGH THE MORNING AFTER 6 AM.
TOTAL PRECIPITATION OF 0.20 TO 0.40 INCHES IN THE VALLEY, WITH 1
TO 2 INCHES IN THE MOUNTAINS SOUTH OF US-2. SNOW LEVELS WILL ALLOW
FOR MOST OF THE MOUNTAIN PRECIPITATION TO BE IN THE FORM OF SNOW
WITH LITTLE TO NO RISE EXPECTED IN EITHER THE YAAK RIVER AT TROY
OR FISCHER RIVER NEAR LIBBY.
TONIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW THEN RAIN
OVERNIGHT.
* CHANCE OF PRECIP....100 PERCENT.
* CHANCE LIGHTNING....UP TO 10 PERCENT.
* MIN TEMPERATURE.....30-37.
* MAX HUMIDITY........95-100 PERCENT.
* WIND (20 FT)........SOUTHWEST 5-6 MPH SHIFTING TO THE WEST 10-13
MPH.
* PRECIP AMOUNT.......0.20-0.42 INCHES.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........93 91 89 94 100 95 95 86 73 59 46 51
WEATHER COV.....DEF DEF DEF DEF DEF DEF DEF DEF LKY CHC SCH CHC
WEATHER TYPE....RN RN RN RN RN RN RN RN RN RN RN RS
TSTM COV........
CHC OF PCPN (%).90 80 80 90 100 90 90 80 60 40 20 30
CHC OF LTNG (%).0 0 0 0 0 0 0 0 10 10 10 0
TEMP............36 34 35 36 37 36 37 37 33 37 35 35
RH..............100 99 100 100 100 100 100 100 99 89 89 80
SURFACE WND DIR.W SW SW SW S S SW SW W W W W
SURFACE WND SPD.5 5 5 6 6 7 8 9 10 12 15 15
SURFACE WND GST. 10 10 10 15 15 20 30 40 40
FRIDAY
* SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF RAIN AND
SNOW.
* CHANCE OF PRECIP....50 PERCENT.
* CHANCE LIGHTNING....0 PERCENT.
* MAX TEMPERATURE.....38-43.
* MIN HUMIDITY........57-62 PERCENT.
* WIND (20 FT)........WEST 7-12 MPH WITH GUST TO 30 MPH, BECOMING
VARIABLE 7-10 MPH.
* PRECIP AMOUNT.......0.00 INCHES.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........40 32 24 20 14 18 26 31 37 33 38 69
WEATHER COV.....SCH SCH CHC
WEATHER TYPE....SN SN SN
TSTM COV........
CHC OF PCPN (%).20 10 10 10 0 0 0 0 10 10 20 50
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............34 34 32 33 37 35 34 35 35 35 34 31
RH..............79 78 77 76 75 69 67 63 61 62 68 73
SURFACE WND DIR.SW W W W W W W W W W W W
SURFACE WND SPD.12 9 8 7 7 7 7 7 7 8 7 3
SURFACE WND GST.30 20 15 10 10 10 10 10 10 10 10 15
FRIDAY NIGHT
* SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW.
* CHANCE OF PRECIP....80 PERCENT.
* CHANCE LIGHTNING....UP TO 10 PERCENT.
* MIN TEMPERATURE.....26-31.
* MAX HUMIDITY........83-88 PERCENT.
* WIND (20 FT)........VARIABLE 1-3 MPH.
* PRECIP AMOUNT.......0.03 INCHES.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........69 69 69 69 69 83 83 83 83 83 83 85
WEATHER COV.....CHC CHC CHC CHC CHC LKY LKY LKY LKY LKY LKY DEF
WEATHER TYPE....SN SN SN SN SN SN SN SN SN SN SN SN
TSTM COV........
CHC OF PCPN (%).50 50 50 50 50 70 70 70 70 70 70 80
CHC OF LTNG (%).0 0 10 10 10 0 0 0 0 0 0 0
TEMP............30 29 29 29 29 28 28 29 29 29 28 28
RH..............77 82 86 84 85 88 89 89 88 87 86 85
SURFACE WND DIR.W W SW SW SW SW SW SW SW SW SW SW
SURFACE WND SPD.3 3 3 3 3 3 3 3 3 3 3 3
SURFACE WND GST.15 15 15 15 15 15 15 15 10 10 10 10
SATURDAY
* SKY/WEATHER.........CLOUDY. SNOW.
* CHANCE OF PRECIP....90 PERCENT.
* MAX TEMPERATURE.....35-40.
* WIND (20 FT)........VARIABLE 1-3 MPH.
* PRECIP AMOUNT.......0.06 INCHES.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........85 85 85 85 85 95 95 95 95 95 95 81
WEATHER COV.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF LKY
WEATHER TYPE....SN SN SN SN SN SN SN SN SN SN SN SN
TSTM COV........
CHC OF PCPN (%).80 80 80 80 80 90 90 90 90 90 90 70
TEMP............29 29 30 31 32 33 34 36 36 36 35 34
SURFACE WND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
SURFACE WND SPD.3 3 2 2 2 2 2 2 3 3 3 2
SURFACE WND GST.10 10 10 10 10 15 15 15 15 15 15 10
FORECASTER...BEC
REQUESTED BY...VICKI STEPHENS
TYPE OF REQUEST...OTHER
.TAG 2527597.5/MSO
.DELDT 12/18/25
.FORMATTERVERSION 2.0.0
.EMAIL VICKI.STEPHENS@MT.GOV
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