486
FOUS55 KTFX 150935
PFMTFX
POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE GREAT FALLS MT
335 AM MDT FRI MAY 15 2026
MTZ312-152200-
GREAT FALLS-CASCADE MT
47.47N 111.38W ELEV. 3663 FT
335 AM MDT FRI MAY 15 2026
DATE FRI 05/15/26 SAT 05/16/26 SUN 05/17/26
MDT 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
MAX/MIN 62 41 57 34 43
TEMP 43 51 57 60 61 53 48 45 42 48 52 55 53 48 43 40 36 35 38 41 40
DEWPT 25 26 23 22 22 25 28 28 27 29 24 23 25 28 30 31 30 29 31 33 31
RH 49 37 27 23 22 33 46 51 55 47 33 29 33 46 60 70 79 78 76 73 70
WIND DIR SW W W W W W W W SW SW SW W W W NW NW NW NW N N N
WIND SPD 12 29 26 23 18 11 8 10 11 14 12 11 11 10 12 12 16 23 21 19 16
WIND GUST 26 41 32
CLOUDS FW FW SC SC FW SC B2 OV OV OV OV B2 B1 B2 B2 OV OV OV OV OV B2
POP 12HR 0 10 30 60 90
QPF 12HR 0 0 0 0.12 0.17
SNOW 12HR 00-00 00-00 00-00
RAIN S C C C L L D D S D L
SNOW S S D D D S
DATE MON 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26
MDT 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MIN/MAX 30 48 30 60 37 66 43 70
TEMP 36 31 42 46 37 32 53 59 44 38 60 64 50 44 65 68
DEWPT 31 28 29 29 30 28 30 30 33 31 33 32 35 34 34 34
PWIND DIR N N SE SW SW SW SW SW
WIND CHAR GN LT LT LT LT GN GN GN
AVG CLOUDS B2 B2 B2 B1 B1 SC B1 SC B1 B1 SC SC SC SC SC SC
POP 12HR 60 40 10 5 5 10 5 5
RAIN L C C S
SNOW L C C S
MTZ303-152200-
CUT BANK-GLACIER MT
48.60N 112.39W ELEV. 3838 FT
335 AM MDT FRI MAY 15 2026
DATE FRI 05/15/26 SAT 05/16/26 SUN 05/17/26
MDT 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
MAX/MIN 57 34 55 29 44
TEMP 39 45 52 55 55 46 41 36 35 44 51 53 51 42 37 32 30 33 37 42 42
DEWPT 26 24 23 22 23 25 28 25 25 24 21 20 24 28 31 29 27 28 27 28 26
RH 59 43 32 27 29 43 59 64 66 45 30 27 34 57 79 88 88 82 67 57 53
WIND DIR W W W W W W SW W SW W W W W NW NW NW NW N N N N
WIND SPD 24 35 33 31 27 19 13 17 18 23 21 23 20 18 14 17 20 26 26 25 20
WIND GUST 40 47 43 43 40 31 32 37 36 31
CLOUDS SC FW FW FW FW B2 B2 SC B1 B1 SC B1 B1 B1 B1 B2 OV OV B2 B2 OV
POP 12HR 0 5 10 50 60
QPF 12HR 0 0 0 0.01 0.03
SNOW 12HR 00-00 00-00 00-00
RAIN C C C C C S
SNOW C L L C C S
DATE MON 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26
MDT 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MIN/MAX 27 52 29 61 36 65 39 67
TEMP 34 28 45 50 37 31 54 59 44 38 59 62 47 41 62 64
DEWPT 27 24 25 24 28 27 27 28 32 30 31 31 34 33 32 32
PWIND DIR N N SE W W W W W
WIND CHAR GN LT LT LT GN GN GN GN
AVG CLOUDS B2 B1 SC SC B1 SC SC SC B1 B1 B1 SC B1 SC SC SC
POP 12HR 20 10 0 5 5 20 5 10
RAIN S S
SNOW S
MTZ319-152200-
HELENA-LEWIS & CLARK MT
46.61N 111.96W ELEV. 3893 FT
335 AM MDT FRI MAY 15 2026
DATE FRI 05/15/26 SAT 05/16/26 SUN 05/17/26
MDT 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
MAX/MIN 63 39 55 34 43
TEMP 42 45 55 61 63 54 46 44 40 43 48 52 51 47 42 37 34 36 40 42 41
DEWPT 28 24 22 20 19 20 24 27 29 31 28 27 21 25 27 27 28 29 29 32 27
RH 57 43 27 20 18 26 42 51 64 62 46 38 30 42 55 67 78 75 64 67 57
WIND DIR W W W W W W W W W W NW W NW NW W W NW NW N N N
WIND SPD 9 18 19 23 20 11 2 3 1 3 5 10 14 13 9 9 9 14 17 20 19
WIND GUST 27 33 32 32 24 28 32 33 32
CLOUDS FW SC FW SC SC SC B2 OV OV OV B2 B2 B1 B2 OV OV OV OV OV OV B2
POP 12HR 5 10 60 50 90
QPF 12HR 0 0 0.02 0.11 0.10
SNOW 12HR 00-00 00-00 00-00
RAIN C C L C C C C C S S S
RAIN SHWRS D D
SNOW S C D D C
SNOWSHWRS D D
TSTMS S S
DATE MON 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26
MDT 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MIN/MAX 31 49 30 61 35 67 40 71
TEMP 37 31 42 48 38 31 53 59 44 35 59 66 50 40 64 69
DEWPT 28 27 27 25 28 27 28 26 30 29 31 29 33 33 33 30
PWIND DIR NW N W SW W W W W
WIND CHAR GN GN LT LT LT LT LT LT
AVG CLOUDS OV B2 B2 B1 B1 SC B1 SC B1 SC SC SC B1 SC B1 SC
POP 12HR 50 30 5 10 5 20 5 10
RAIN C S C C
RAIN SHWRS S
SNOW C S C C
TSTMS S
MTZ326-152200-
BOZEMAN-GALLATIN MT
45.78N 111.16W ELEV. 4475 FT
335 AM MDT FRI MAY 15 2026
DATE FRI 05/15/26 SAT 05/16/26 SUN 05/17/26
MDT 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
MAX/MIN 65 37 59 29 44
TEMP 38 47 57 63 65 55 47 43 40 47 55 55 49 40 37 34 30 35 40 42 41
DEWPT 24 25 23 21 18 21 24 26 25 27 25 31 37 35 33 32 29 31 31 32 31
RH 57 42 27 20 16 26 40 51 55 45 31 40 63 82 85 92 96 85 70 67 67
WIND DIR SW W W W NW N SW S S W W NW NW NW W W W NW NW NW N
WIND SPD 4 14 14 18 14 8 2 2 3 4 8 12 12 10 8 5 5 9 9 14 16
WIND GUST 26 32 27 18 19 27 31
CLOUDS SC SC SC SC SC SC B1 B2 OV OV B2 OV OV OV OV OV OV B2 B2 B2 B2
POP 12HR 0 5 70 100 80
QPF 12HR 0 0 0.02 0.28 0.13
SNOW 12HR 00-00 00-00 00-00
RAIN C D D D D S S L C
RAIN SHWRS C L
SNOW D D D D L S
SNOWSHWRS L
TSTMS S S
DATE MON 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26
MDT 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MIN/MAX 26 45 25 56 30 64 35 69
TEMP 34 27 39 43 33 28 48 54 39 33 58 62 45 38 63 67
DEWPT 29 25 29 29 29 26 29 28 29 27 31 30 32 30 33 32
PWIND DIR NW NW SE SW SW SW SE SW
WIND CHAR GN LT LT LT LT LT LT LT
AVG CLOUDS B2 B2 B2 B1 B1 SC B1 SC B1 B1 SC SC B1 SC SC SC
POP 12HR 50 50 20 10 10 10 10 10
RAIN C C S
SNOW C C C C S
MTZ330-152200-
WEST YELLOWSTONE-GALLATIN MT
44.69N 111.11W ELEV. 6644 FT
335 AM MDT FRI MAY 15 2026
DATE FRI 05/15/26 SAT 05/16/26 SUN 05/17/26
MDT 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
MAX/MIN 63 31 56 26 42
TEMP 31 43 57 61 61 50 40 35 32 41 52 54 54 43 35 29 26 32 39 42 38
DEWPT 16 20 15 13 10 20 21 22 21 22 17 18 18 26 27 25 25 24 19 23 22
RH 53 39 19 15 13 30 46 59 63 46 25 24 24 51 72 85 96 72 44 46 52
WIND DIR SE SW W SW W SW SW SW S SW SW SW SW SW SW W NW NW NW N N
WIND SPD 3 5 16 14 13 10 4 1 2 8 18 19 17 10 4 2 1 2 3 6 12
WIND GUST 19 29 32 31 26 16 36 35 36 27 16 29
CLOUDS CL FW SC SC B1 B1 SC SC B2 OV OV B1 B1 B1 B1 B2 B2 B2 B2 B2 B2
POP 12HR 0 5 10 50 70
QPF 12HR 0 0 0 0.01 0.04
SNOW 12HR 00-00 00-00 00-00
RAIN C C
SNOW C C C L L C
SNOWSHWRS L L
TSTMS S S
DATE MON 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26
MDT 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MIN/MAX 21 40 19 50 24 58 29 65
TEMP 28 22 36 38 26 21 45 49 31 26 53 56 37 30 60 63
DEWPT 25 21 20 18 23 21 19 20 25 23 23 25 28 26 26 28
PWIND DIR N N N W W SW SW SW
WIND CHAR GN GN LT LT LT LT LT LT
AVG CLOUDS B2 B2 B2 B1 B1 SC B1 B1 B1 SC SC SC B1 SC SC SC
POP 12HR 40 50 10 10 20 20 5 10
RAIN S
RAIN SHWRS S
SNOW C C C C S
SNOWSHWRS S
TSTMS S
MTZ328-152200-
DILLON-BEAVERHEAD MT
45.26N 112.55W ELEV. 5357 FT
335 AM MDT FRI MAY 15 2026
DATE FRI 05/15/26 SAT 05/16/26 SUN 05/17/26
MDT 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
MAX/MIN 65 38 58 28 44
TEMP 37 46 57 63 65 53 46 42 39 46 55 56 50 40 35 31 29 33 40 43 41
DEWPT 23 27 22 16 18 21 23 23 20 26 22 24 30 29 28 26 25 27 27 29 28
RH 56 47 25 16 16 28 40 46 46 45 27 29 46 64 75 81 85 78 59 57 59
WIND DIR SW SW W W W NW SW S W SW SW W NW N N NW W N N N N
WIND SPD 5 8 16 19 17 10 5 4 5 10 20 18 14 16 12 9 9 11 17 19 23
WIND GUST 18 26 31 27 25 27 33 36
CLOUDS SC FW FW SC B1 B2 B2 OV OV B2 B2 B2 B2 OV OV OV B2 B2 B2 B2 B1
POP 12HR 0 10 30 70 70
QPF 12HR 0 0 0 0.20 0.08
SNOW 12HR 00-00 00-00 00-00
RAIN L L C
RAIN SHWRS C S S
SNOW S L L L L C
SNOWSHWRS L L
TSTMS S S S S
DATE MON 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26
MDT 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MIN/MAX 25 46 25 56 31 64 36 69
TEMP 32 26 40 44 33 28 50 55 39 33 57 62 45 38 63 67
DEWPT 26 22 26 26 25 23 26 25 27 24 28 27 29 27 30 29
PWIND DIR N N E SW W SW SW SW
WIND CHAR WY BZ LT LT LT LT LT LT
AVG CLOUDS B2 B2 B1 B1 B1 SC B1 SC B1 B1 SC FW SC SC SC SC
POP 12HR 30 30 10 10 10 10 5 10
RAIN C
RAIN SHWRS S
SNOW C C C
SNOWSHWRS S
TSTMS S
MTZ305-152200-
HAVRE-HILL MT
48.54N 109.76W ELEV. 2585 FT
335 AM MDT FRI MAY 15 2026
DATE FRI 05/15/26 SAT 05/16/26 SUN 05/17/26
MDT 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
MAX/MIN 65 39 63 33 47
TEMP 44 49 58 63 63 54 49 44 40 48 58 61 59 51 45 41 37 35 42 45 44
DEWPT 29 30 28 26 25 26 29 28 28 27 28 25 27 31 34 35 33 31 34 34 33
RH 55 48 32 24 23 34 46 53 62 44 32 25 29 46 65 79 85 85 73 65 65
WIND DIR W W W W W W W SW SW W SW W W NW NW NW NW N N N N
WIND SPD 16 24 24 23 21 12 13 11 11 13 13 12 12 9 10 10 13 14 18 18 16
WIND GUST 31 35 35 35
CLOUDS B1 SC SC B1 SC FW FW SC SC B1 B2 OV B2 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR 5 5 20 60 80
QPF 12HR 0 0 0 0.03 0.15
SNOW 12HR 00-00 00-00 00-00
RAIN S S S L L D D D D L
SNOW S S S L
DATE MON 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26
MDT 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MIN/MAX 29 51 29 61 35 68 40 72
TEMP 37 30 44 49 37 31 54 59 45 38 63 66 50 43 67 70
DEWPT 33 29 30 28 31 29 31 30 33 32 35 33 37 35 37 35
PWIND DIR N N E S SE SW SW SW
WIND CHAR GN LT LT LT LT LT LT LT
AVG CLOUDS OV OV B2 B1 B1 SC SC SC SC B1 B1 SC SC SC SC SC
POP 12HR 60 30 10 5 5 10 5 5
RAIN L S S C
SNOW L S S
MTZ314-152200-
LEWISTOWN-FERGUS MT
47.05N 109.46W ELEV. 4144 FT
335 AM MDT FRI MAY 15 2026
DATE FRI 05/15/26 SAT 05/16/26 SUN 05/17/26
MDT 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
MAX/MIN 61 38 56 30 40
TEMP 40 48 56 59 59 50 45 43 39 47 53 53 48 41 38 36 34 32 36 38 37
DEWPT 22 24 22 22 22 25 26 26 24 27 26 31 35 34 33 32 32 29 31 32 32
RH 48 39 26 24 24 37 47 51 54 45 35 43 60 76 82 85 92 88 82 79 82
WIND DIR W W W W NW NW SW SW SW NW N NW NW NW NW NW NW NW NW NW NW
WIND SPD 16 26 24 23 18 6 4 3 4 5 5 6 6 6 6 8 11 16 16 16 16
WIND GUST 28 37 26 26
CLOUDS SC SC FW SC FW FW B1 B2 B2 B1 B2 OV OV OV OV OV OV OV OV OV OV
POP 12HR 0 10 80 90 90
QPF 12HR 0 0 0.05 0.35 0.15
SNOW 12HR 00-00 00-00 00-00
RAIN C D D D D S D D D S
RAIN SHWRS L
SNOW D D D D D D D
TSTMS S
DATE MON 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26
MDT 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MIN/MAX 27 40 26 53 31 61 37 66
TEMP 33 28 36 38 31 29 46 51 37 35 57 59 44 41 61 64
DEWPT 31 28 29 29 28 27 30 31 30 29 32 34 33 33 34 35
PWIND DIR NW NW S W S W SW W
WIND CHAR GN LT LT LT LT LT LT LT
AVG CLOUDS OV OV OV B2 B1 B1 B1 SC B1 B1 SC SC SC SC SC SC
POP 12HR 80 70 30 20 5 20 10 20
RAIN S S L C S
RAIN SHWRS S S
SNOW D L L L C S
TSTMS S S
HTTP://WWW.WEATHER.GOV/GREATFALLS
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page