133
FNUS75 KMSO 070143
FWSMSO
SPOT FORECAST FOR LOOP SAR
NATIONAL WEATHER SERVICE MISSOULA MT
743 PM MDT SUN SEP 6 2026
FORECAST IS BASED ON FORECAST START TIME OF 2000 MDT ON SEPTEMBER 06.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
A VERY WET SYSTEM FOR SEPTEMBER IS IMPACTING THE
REGION CURRENTLY. THROUGH 11 PM, A STRONG THUNDERSTORM WILL BE
POSSIBLE, THREATS BEING LIGHTNING, SMALL HAIL, AND VERY HEAVY
RAINFALL RATES. THE CHARACTERISTIC OF RAIN WILL SLOWLY CHANGE OVER
NIGHT FROM SHOWERS TO LIGHT STEADY AND EVENTUALLY MODERATE TO
HEAVY RAIN THROUGH TUESDAY.
OVERALL RAIN AMOUNTS WILL PRODUCE A REACTION IN SMALL STREAMS AND
CREEKS. ADDITIONALLY, DEBRIS SLIDES WILL BE A SMALL THREAT FOR
THE NEXT 36 HOURS MINIMUM.
WINDS WILL BE LIGHT AND COMBINE WITH MIN TEMPERATURES OVERNIGHT TO
PRODUCE WET AND RAW CONDITIONS WITH WIND CHILLS SIMILAR TO
TEMPERATURES. WINDS GUSTS INCREASE 10 TO 15 MPH TOMORROW AS THE
LOW PRESSURE MOVES EAST OF THE REGION AND WIND CHILLS BECOME 4-8
DEGREES COOLER THAN TEMPERATURES INCREASING CHANCES OF
HYPOTHERMIA.
REST OF TONIGHT
* SKY/WEATHER.........CLOUDY THEN BECOMING MOSTLY CLOUDY. RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS EARLY IN THE EVENING,
THEN RAIN LIKELY OVERNIGHT.
* CHANCE OF PRECIP....80 PERCENT.
* CHANCE LIGHTNING....20 PERCENT.
* MIN TEMPERATURE.....45-50.
* MAX HUMIDITY........95-100 PERCENT.
* WIND CHILL..........40-45.
* WIND (20 FT)........VARIABLE 1-3 MPH.
* PRECIP AMOUNT.......0.07-0.37 INCHES.
TIME (MDT) 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........97 96 79 82 60 79 74 82 75 89
WEATHER COV.....DEF LKY CHC CHC CHC CHC CHC CHC CHC LKY
WEATHER TYPE....RW RN RN RN RN RN RN RN RN RN
TSTM COV........SCH
CHC OF PCPN (%).80 60 40 40 30 30 50 30 40 60
CHC OF LTNG (%).20 10 10 10 10 10 10 10 10 10
TEMP............57 55 52 52 51 49 49 49 49 48
RH..............91 88 87 87 89 92 91 88 91 91
WIND CHILL (F)..56 54 51 50 50 48 48 47 47 45
SURFACE WND DIR.NE E NE NE NE NE E NE E E
SURFACE WND SPD.2 2 2 2 1 1 1 1 1 1
SURFACE WND GST.5 5 5 5 5 5 5 5 5 5
LABOR DAY
* SKY/WEATHER.........CLOUDY. RAIN IN THE MORNING, THEN RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
* CHANCE OF PRECIP....100 PERCENT.
* CHANCE LIGHTNING....25 PERCENT.
* MAX TEMPERATURE.....54-59.
* MIN HUMIDITY........86-91 PERCENT.
* WIND CHILL..........54-59.
* WIND (20 FT)........VARIABLE 1-3 MPH BECOMING WEST 5-9 MPH WITH GUSTS
TO 14 MPH LATE IN THE AFTERNOON.
* PRECIP AMOUNT.......0.68-1.04 INCHES.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........91 99 98 96 92 96 100 100 98 97 96 97
WEATHER COV.....CHC CHC CHC LKY DEF DEF DEF DEF DEF DEF DEF DEF
WEATHER TYPE....RN RN RN RN RN RN RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH SCH SCH SCH
CHC OF PCPN (%).30 40 50 60 80 90 100 100 90 90 90 90
CHC OF LTNG (%).10 10 10 10 10 10 30 30 30 20 20 20
TEMP............48 47 48 51 53 53 53 54 54 54 54 55
RH..............91 91 93 91 95 98 100 100 100 100 100 100
WIND CHILL (F)..46 45 46 49 51 51 51 51 51 50 49 50
SURFACE WND DIR.NE E NE N N N W W W W W W
SURFACE WND SPD.1 1 1 2 2 2 3 3 3 5 5 5
SURFACE WND GST.5 5 5 5 5 5 5 10 10 10 15 15
MONDAY NIGHT
* SKY/WEATHER.........CLOUDY. RAIN.
* CHANCE OF PRECIP....100 PERCENT.
* CHANCE LIGHTNING....UP TO 10 PERCENT.
* MIN TEMPERATURE.....45-50.
* MAX HUMIDITY........95-100 PERCENT.
* WIND CHILL..........38-43.
* WIND (20 FT)........SOUTHWEST 5-7 MPH WITH GUSTS TO 14 MPH.
* PRECIP AMOUNT.......0.41-0.96 INCHES.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........99 99 99 99 99 99 98 98 98 98 98 98
WEATHER COV.....LKY LKY DEF DEF DEF DEF LKY DEF DEF DEF DEF DEF
WEATHER TYPE....RN RN RN RN RN RN RN RN RN RN RN RN
TSTM COV........
CHC OF PCPN (%).70 70 90 80 90 100 70 90 80 90 90 90
CHC OF LTNG (%).10 10 10 10 10 10 10 10 10 0 0 0
TEMP............54 54 52 50 49 49 48 47 47 48 48 48
RH..............100 100 99 91 90 89 90 93 92 89 90 90
WIND CHILL (F)..51 51 48 46 45 45 44 40 40 42 43 44
SURFACE WND DIR.W W W SW SW SW SW SW SW SW SW SW
SURFACE WND SPD.6 6 6 7 7 7 6 6 6 5 5 5
SURFACE WND GST.15 15 15 15 15 15 15 15 15 15 15 15
FORECASTER...BEC
REQUESTED BY...RANGER SEIFERT
TYPE OF REQUEST...SAR
.TAG 2621347.0/MSO
.DELDT 09/06/26
.FORMATTERVERSION 2.0.0
.EMAIL GLAC_DISPATCH@NPS.GOV
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