150
FOUS55 KTFX 152135
PFMTFX
POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE GREAT FALLS MT
335 PM MDT FRI MAY 15 2026
MTZ312-161000-
GREAT FALLS-CASCADE MT
47.47N 111.38W ELEV. 3663 FT
335 PM MDT FRI MAY 15 2026
DATE 05/15/26 SAT 05/16/26 SUN 05/17/26 MON
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
MIN/MAX 41 57 34 44 29
TEMP 62 54 48 45 42 48 51 55 54 48 43 40 37 38 39 42 41 38 36 33 30
DEWPT 24 25 27 26 25 29 28 27 26 27 28 30 30 31 31 32 31 29 30 29 27
RH 23 32 44 47 50 47 41 34 34 44 55 67 75 76 73 67 67 70 79 85 88
WIND DIR W W W SW SW SW SW W W W W W NW NW N N N N NW W W
WIND SPD 16 10 8 11 10 14 13 11 11 12 12 12 14 20 21 20 17 12 6 5 5
WIND GUST 32 31
CLOUDS SC B1 B2 OV OV OV B2 B2 OV OV B2 OV OV OV B2 B2 B2 OV B2 B2 B2
POP 12HR 5 20 40 80 50
QPF 12HR 0 0 0.05 0.18 0.03
SNOW 12HR 00-00 00-00 00-00
RAIN S S C S C C D D D C C C C
SNOW C D D D C C C C C
DATE 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26 FRI 05/22/26
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MAX/MIN 50 29 61 37 65 42 70 44 69
TEMP 43 47 36 32 54 59 45 39 60 63 50 44 64 67 53 46 65 66
DEWPT 27 27 29 26 29 30 34 32 33 33 36 35 34 33 38 37 35 35
PWIND DIR N SE SW S SW SW SW SW W
WIND CHAR LT LT LT GN GN GN GN GN GN
AVG CLOUDS B1 SC SC SC SC SC B1 SC SC SC SC SC B1 SC B1 B1 B1 SC
POP 12HR 30 10 10 10 10 5 10 20 20
RAIN C S S S
RAIN SHWRS S
SNOW C
TSTMS S
MTZ303-161000-
CUT BANK-GLACIER MT
48.60N 112.39W ELEV. 3838 FT
335 PM MDT FRI MAY 15 2026
DATE 05/15/26 SAT 05/16/26 SUN 05/17/26 MON
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
MIN/MAX 34 55 29 43 26
TEMP 57 48 42 37 35 44 51 53 52 43 37 34 32 33 38 42 41 38 34 29 27
DEWPT 25 26 28 26 24 24 22 22 23 26 30 31 28 28 28 28 26 27 28 25 23
RH 29 42 57 64 64 45 32 29 32 51 75 89 85 82 67 57 55 64 78 85 85
WIND DIR W W W SW SW W W W W W NW NW N N N N N N NW NW NW
WIND SPD 24 17 13 16 16 24 23 23 21 17 14 18 21 26 27 27 20 11 5 5 5
WIND GUST 34 33 28 41 40 32
CLOUDS SC B2 B2 B1 B1 B2 B1 B1 B1 B1 B2 OV OV B2 B2 B2 B2 B2 B1 SC B1
POP 12HR 5 5 70 70 10
QPF 12HR 0 0 0.01 0.04 0
SNOW 12HR 00-00 00-00 00-00
RAIN L L C
SNOW L L L L C C
DATE 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26 FRI 05/22/26
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MAX/MIN 54 29 61 36 63 38 67 40 65
TEMP 46 51 38 31 55 58 44 38 57 61 46 40 62 65 48 41 60 63
DEWPT 25 25 28 27 28 30 33 31 32 32 34 33 32 33 36 34 33 32
PWIND DIR N SE SW SW W W W W NW
WIND CHAR LT LT LT GN GN GN GN GN GN
AVG CLOUDS SC SC B1 SC SC SC B1 SC SC B1 B1 SC SC SC B1 B1 B1 SC
POP 12HR 5 0 20 10 20 5 10 20 20
RAIN S S S S S
RAIN SHWRS S
TSTMS S
MTZ319-161000-
HELENA-LEWIS & CLARK MT
46.61N 111.96W ELEV. 3893 FT
335 PM MDT FRI MAY 15 2026
DATE 05/15/26 SAT 05/16/26 SUN 05/17/26 MON
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
MIN/MAX 39 54 34 46 31
TEMP 64 56 47 44 41 42 47 52 51 47 42 38 35 37 43 45 44 40 38 34 32
DEWPT 18 22 25 27 31 31 31 29 24 23 24 26 27 27 29 30 27 26 28 27 27
RH 17 26 42 51 67 65 53 41 34 38 48 62 72 67 57 55 51 57 67 75 81
WIND DIR W W N SW N W W W W W W W W NW N N N N NW NW NW
WIND SPD 17 10 0 3 0 2 4 9 16 12 9 8 9 12 16 20 19 16 9 6 3
WIND GUST 27 24 29 33 33 26
CLOUDS B1 B1 B2 B2 OV OV B2 B2 B2 B2 B2 B2 B2 B2 OV OV B2 OV B2 B2 B2
POP 12HR 10 50 30 80 40
QPF 12HR 0 0.02 0.05 0.08 0.01
SNOW 12HR 00-00 00-00 00-00
RAIN S C C C C S C L C C S
RAIN SHWRS D D
SNOW C C L L S S S
SNOWSHWRS D D
TSTMS S S
DATE 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26 FRI 05/22/26
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MAX/MIN 52 30 62 35 66 38 71 41 71
TEMP 45 48 38 31 54 60 46 37 59 64 49 41 63 69 53 43 65 70
DEWPT 26 24 27 26 27 25 31 31 31 29 33 34 33 30 34 35 33 31
PWIND DIR N W W SW W W W W W
WIND CHAR LT LT LT LT LT LT LT LT LT
AVG CLOUDS B1 SC B1 SC B1 B1 B1 SC SC SC B1 SC B1 SC B1 SC SC SC
POP 12HR 20 10 10 10 10 5 10 10 20
RAIN S
RAIN SHWRS S S
SNOW S
TSTMS S S
MTZ326-161000-
BOZEMAN-GALLATIN MT
45.78N 111.16W ELEV. 4475 FT
335 PM MDT FRI MAY 15 2026
DATE 05/15/26 SAT 05/16/26 SUN 05/17/26 MON
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
MIN/MAX 36 58 29 45 26
TEMP 65 55 47 42 37 47 54 54 49 39 34 33 31 35 40 44 43 38 34 31 27
DEWPT 18 21 23 24 23 27 29 34 38 34 30 31 30 30 29 31 28 28 28 27 25
RH 16 26 38 48 56 45 38 46 66 82 85 92 96 82 64 60 55 67 78 85 92
WIND DIR NW N W N S W W NW NW NW W SW W W NW NW N N N N NW
WIND SPD 13 6 3 0 2 5 8 12 12 9 6 4 4 8 9 13 14 13 8 5 5
WIND GUST 23 19 26 28
CLOUDS SC B1 B2 B1 B2 OV B2 B2 OV OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR 5 70 90 70 30
QPF 12HR 0 0.04 0.17 0.07 0.01
SNOW 12HR 00-00 00-00 T
RAIN D D L L C C
RAIN SHWRS C L
SNOW D L L L L L C C C C
SNOWSHWRS L
TSTMS S S
DATE 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26 FRI 05/22/26
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MAX/MIN 48 27 58 32 64 36 69 39 70
TEMP 40 43 34 29 50 56 41 34 57 62 46 37 63 67 50 40 65 68
DEWPT 27 26 28 26 27 25 30 28 30 30 33 31 32 31 35 33 33 32
PWIND DIR NW E SW SE SW SE SW S SW
WIND CHAR LT LT LT LT LT LT LT LT LT
AVG CLOUDS B2 B1 SC SC SC SC SC B1 SC SC B1 B1 SC SC SC B1 SC SC
POP 12HR 40 20 10 10 10 10 10 20 20
RAIN S S
RAIN SHWRS C S S
SNOW C
SNOWSHWRS C
TSTMS S S S
MTZ330-161000-
WEST YELLOWSTONE-GALLATIN MT
44.69N 111.11W ELEV. 6644 FT
335 PM MDT FRI MAY 15 2026
DATE 05/15/26 SAT 05/16/26 SUN 05/17/26 MON
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
MIN/MAX 30 55 25 42 21
TEMP 61 50 39 34 31 40 51 53 53 43 34 30 26 31 39 42 39 33 29 25 22
DEWPT 10 17 18 18 18 19 21 22 22 26 26 25 24 22 19 19 19 22 24 23 21
RH 13 27 42 51 58 42 30 29 29 51 72 81 92 69 44 39 44 63 81 92 96
WIND DIR SW SW SW S S SW SW SW SW W NW NW N NW NW N N N N N N
WIND SPD 14 10 4 1 1 4 17 19 16 9 4 2 2 3 4 8 12 14 12 11 11
WIND GUST 27 21 16 14 35 36 36 27 17 18 28 34 31 28 29
CLOUDS B1 B1 SC SC B1 B2 B2 B1 B1 B2 OV OV OV B2 B2 B2 B2 B1 B2 B2 B1
POP 12HR 5 30 70 60 30
QPF 12HR 0 0 0.01 0.03 0
SNOW 12HR 00-00 00-00 T
RAIN C C
RAIN SHWRS S
SNOW C L L L L S S C C C
SNOWSHWRS L L
TSTMS S S S
WINTER WEATH Y Y Y Y
DATE 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26 FRI 05/22/26
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MAX/MIN 42 19 50 24 57 28 64 32 64
TEMP 38 39 26 21 45 48 31 26 53 55 36 29 59 62 40 32 60 63
DEWPT 19 16 23 21 18 19 26 24 24 26 29 27 26 27 31 28 27 27
PWIND DIR N N SW W SW SW SW SW SW
WIND CHAR GN LT LT LT LT LT LT LT LT
AVG CLOUDS B1 B1 SC SC SC B1 B1 B1 SC SC B1 SC SC SC SC SC SC SC
POP 12HR 30 10 10 10 10 5 10 10 20
RAIN SHWRS S
SNOW C
SNOWSHWRS S
TSTMS S S
MTZ328-161000-
DILLON-BEAVERHEAD MT
45.26N 112.55W ELEV. 5357 FT
335 PM MDT FRI MAY 15 2026
DATE 05/15/26 SAT 05/16/26 SUN 05/17/26 MON
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
MIN/MAX 37 58 27 46 25
TEMP 64 53 46 41 41 48 55 56 51 40 35 31 28 33 42 45 43 37 33 29 26
DEWPT 18 20 22 22 22 27 26 28 30 27 25 24 22 24 26 26 26 25 26 24 22
RH 17 27 38 46 46 44 32 34 44 59 66 75 78 69 53 47 51 61 75 81 85
WIND DIR W NW SW S SW SW SW W NW N N NW SW N N N N N N N N
WIND SPD 13 6 5 4 4 6 18 18 16 13 9 6 8 9 12 18 20 21 18 14 11
WIND GUST 28 27 24 23 28 33 33 28
CLOUDS SC B2 B2 OV OV B2 B2 B1 B2 OV OV B2 B1 B1 B2 B2 B1 B2 B2 B1 B1
POP 12HR 5 30 60 60 30
QPF 12HR 0 0 0.06 0.04 0.01
SNOW 12HR 00-00 00-00 T
RAIN C L C C
RAIN SHWRS S C L
SNOW L C C C C C C S
SNOWSHWRS L L
TSTMS S S S S
DATE 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26 FRI 05/22/26
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MAX/MIN 48 27 58 32 63 36 69 39 71
TEMP 42 44 34 29 51 56 41 34 57 61 45 38 63 67 49 41 65 69
DEWPT 25 24 25 23 25 24 27 26 28 28 29 28 31 29 30 29 30 27
PWIND DIR N E SW SW SW W SW SW SW
WIND CHAR GN LT LT LT LT LT GN GN GN
AVG CLOUDS B1 SC SC B1 B1 SC B1 SC SC SC B1 SC SC FW SC SC SC FW
POP 12HR 20 10 10 10 10 10 5 10 10
RAIN SHWRS S
SNOW S
SNOWSHWRS S
TSTMS S
MTZ305-161000-
HAVRE-HILL MT
48.54N 109.76W ELEV. 2585 FT
335 PM MDT FRI MAY 15 2026
DATE 05/15/26 SAT 05/16/26 SUN 05/17/26 MON
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
MIN/MAX 38 62 33 47 28
TEMP 64 55 49 44 39 48 57 60 59 51 45 41 37 38 42 45 43 40 37 33 29
DEWPT 27 29 29 28 26 27 27 27 28 32 35 36 34 35 35 34 33 33 34 31 28
RH 24 37 46 53 59 44 31 28 30 48 68 82 89 89 76 65 67 76 89 92 96
WIND DIR W W W SW SW W SW W SW S W W NW N N N N N N NW NW
WIND SPD 18 8 11 10 10 13 13 11 10 9 9 10 12 13 17 18 16 11 8 6 4
CLOUDS SC SC SC B1 SC B1 OV B2 OV OV OV OV OV OV OV OV B2 OV B2 B2 B2
POP 12HR 10 20 40 80 70
QPF 12HR 0 0 0.06 0.25 0.04
SNOW 12HR 00-00 00-00 00-00
RAIN S S S C C L L D D L L C C S
RAIN SHWRS
SNOW S
DATE 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26 FRI 05/22/26
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MAX/MIN 52 28 62 36 66 39 71 43 69
TEMP 44 49 37 30 55 60 46 38 62 64 49 41 67 69 53 44 67 68
DEWPT 30 28 30 28 32 31 34 33 36 34 38 36 37 34 39 38 38 36
PWIND DIR N E S S W S SW SW W
WIND CHAR LT LT LT LT GN LT LT GN GN
AVG CLOUDS B2 B1 B1 FW SC FW SC B1 SC SC SC B1 SC SC B1 B1 B1 SC
POP 12HR 20 5 5 5 20 10 5 20 20
RAIN S S S S
RAIN SHWRS S S
TSTMS S S
MTZ314-161000-
LEWISTOWN-FERGUS MT
47.05N 109.46W ELEV. 4144 FT
335 PM MDT FRI MAY 15 2026
DATE 05/15/26 SAT 05/16/26 SUN 05/17/26 MON
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12
MIN/MAX 38 56 30 41 27
TEMP 59 50 45 44 42 47 52 51 47 41 38 37 34 35 38 39 38 35 33 31 28
DEWPT 23 25 25 26 28 28 30 33 37 36 34 33 32 31 31 32 32 31 30 29 28
RH 25 37 45 49 57 47 43 50 68 82 85 85 92 85 76 76 79 85 89 92100
WIND DIR NW W SW SW S NW NW N NW W W W W NW NW NW NW NW NW NW NW
WIND SPD 16 5 4 3 3 5 5 5 5 5 8 10 13 16 17 18 18 14 11 10 9
WIND GUST 28 28
CLOUDS FW SC B1 B2 B1 B1 B2 B2 OV OV OV OV OV B2 OV OV OV OV OV OV OV
POP 12HR 5 80 90 90 80
QPF 12HR 0 0.07 0.25 0.20 0.06
SNOW 12HR 00-00 00-00 00-00
RAIN C D L L L D D D S
RAIN SHWRS L
SNOW L L L L D D D D D D L
TSTMS S
DATE 05/18/26 TUE 05/19/26 WED 05/20/26 THU 05/21/26 FRI 05/22/26
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
MAX/MIN 43 26 55 32 60 36 65 40 65
TEMP 37 39 31 30 49 53 39 36 56 58 43 40 61 62 48 43 61 63
DEWPT 29 29 28 26 29 30 30 30 33 34 34 33 34 35 36 36 35 36
PWIND DIR NW SE W S W SW W SW W
WIND CHAR GN LT LT LT GN LT LT LT LT
AVG CLOUDS OV B1 B1 SC SC SC SC B1 SC B1 SC B1 SC SC SC B1 SC B1
POP 12HR 70 20 20 5 30 10 10 20 30
RAIN C S S S
RAIN SHWRS S C S C
SNOW L C
TSTMS S S S S
HTTP://WWW.WEATHER.GOV/GREATFALLS
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page