Cooperative Observer Water Year Precipitation
Western and Central Wyoming
PRELIMINARY WATER YEAR PRECIPITATION TOTALS
DATA AS OF: SEPTEMBER 2025
FILE CREATED AT: Mon Oct 6 18:00:03 GMT 2025
NOTE: Precipitation totals preceding an "*" character may be low,
because of one or more daily reports are missing in the database.
Use this data with caution.
BIG HORN COUNTY WY STATIONS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
KGEY GREYBULL ASOS 0.38 0.21 0.23 0.16 0.05 0.47 0.45 1.58 0.46 0.86 0.17 0.65 5.67 +0.12 102
GBLW4 GREYBULL COOP M M M M M M M M M M M M M M M
SHLW4 SHELL 1NE COOP 0.85 0.43 0.27 0.24 1.03 0.43 1.24 1.79 0.54 0.75 0.12 0.29* 7.98* -2.61 75
BSNW4 BASIN COOP 0.85 0.41 0.29 0.00* M M 0.87 0.50* 0.00* 0.00* 0.01 1.13 4.06* -2.78 59
DEVW4 DEAVER COOP 0.30 T T 0.17 0.45 0.11 0.44 1.52 0.66 0.54 0.20 0.48 4.87 -0.53 90
EMBW4 EMBLEM COOP 0.26 0.09 0.02 0.19 0.78 0.46 0.57 1.04 M M M M 3.41* -3.96 46
LOVW4 LOVELL COOP M 0.20 0.03 M M 0.22* 0.97 1.44 0.93 0.00* 0.06* 0.78 4.63* -1.71 73
RONW4 RAIRDEN 2WSW COOP 0.63 0.27 0.18 0.10 0.34 0.70 1.19 1.65 1.16 0.76 0.41 M 7.39* +0.33 105
FREMONT COUNTY WY STATIONS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
KLND LANDER ASOS 1.45 0.32 0.04 0.87 0.15 3.03 2.57 1.88 0.70* 0.28* 0.47 1.20 12.96* -0.27 98
LNRW4 LANDER COOP 1.44* 0.33* 0.02* 0.87* 0.14 2.63* 2.09 2.06 1.15* M M M 10.73* -0.43 96
KRIW RIVERTON ASOS 0.57 0.15 0.05 0.42 0.08 1.72 1.16 1.14 0.90 0.31 0.52 0.99 8.01 -1.42 85
RIVW4 RIVERTON COOP 0.60 0.24* 0.05* 0.51 0.06 1.42 1.42 0.91 1.36 0.46 0.41 0.82* 8.26* -0.16 98
ATLW4 ATLANTIC CITY COOP M M M M M M M M M M 0.00* 0.00* M M M
JEFW4 JEFFREY CITY COOP 1.26 0.01* 0.00* 1.03 T 0.98* 1.01 1.88 0.85 0.34 2.15 0.00* 9.51* -0.55 95
SBDW4 BOYSEN DAM COOP 0.31* T* 0.40 0.58 T* 1.04* 0.89 1.95 0.95 1.56 1.45 0.59 9.72* +0.84 109
SSHW4 SHOSHONI COOP 0.25* 0.05* 0.40* 0.02 0.03 1.08* 0.43 0.64 0.52 0.93 0.32 0.54* 5.21* -2.32 69
DBOW4 DUBOIS COOP 0.74 0.45* 0.23 0.28* 1.06* 1.42 0.92 0.64 0.40 0.71 0.59 1.01 8.45* -1.46 85
PVLW4 PAVILLION COOP 0.60 0.08 0.00 0.42 0.05 1.06 0.61 0.92 2.26 1.27 0.46 0.43* 8.16* +0.24 103
MTNW4 DIVERSION DAM COOP M M M M M M M M M M M M M M M
HOT SPRINGS COUNTY WY STATIONS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
THMW4 THERMOPOLIS COOP 1.08 0.67 0.11 0.36* 0.07 1.23 1.83 3.09* 1.42* 0.97 0.08 1.55* 12.46* +0.75 106
BMTW4 THERMOPOLIS 9NE COOP 1.49* 0.39* T 0.32* 0.16* 1.30 2.49 3.11 1.06 1.14 0.93* 1.11 13.50* +0.81 106
THDW4 THERMOPOLIS 8WNW COOP 0.96 0.15 0.13 0.27 0.11 0.67 1.36 2.00 1.12 0.53 0.93* 0.00* 8.23* M M
BTXW4 BLACK MOUNTAIN COOP 1.00 0.46 0.08 0.43 0.36 1.66 3.24 2.62 1.04 0.69 0.40 0.00* 11.98* -2.27 84
JOHNSON COUNTY WY STATIONS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
KBYG BUFFALO ASOS 0.78 0.05 0.01 T* 0.04 0.60* 0.91 2.79 1.28 2.41 0.32 0.67 9.86* -3.59 73
BUFW4 BUFFALO COOP M M M M M M M M M M M M M M M
BFFW4 BUFFALO 5WSW COOP M M M M M M M M M M M M M M M
BLYW4 BILLY CREEK COOP M M M M M M M M M M M M M M M
KCEW4 KAYCEE COOP 1.08 0.27 T 0.25 0.20 0.80 1.86 2.44 1.47 1.74 0.73 0.00* 10.84* -1.53 88
LINCOLN COUNTY WY STATIONS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
AFOW4 AFTON COOP 1.32* 1.06 2.28 1.32 2.74 3.02* 2.11 2.35 0.02 0.74 2.01 0.86* 19.83* +1.67 109
BDFW4 BEDFORD 3SE COOP 1.22* 1.99 2.29* 1.82* 4.36* 3.61* 2.09* 2.46 0.11* 0.81 2.20 0.32* 23.28* +1.88 109
FBMW4 FOSSIL BUTTE NAT MON COOP 1.09 0.84* 1.41* 0.44* 2.00* 1.75* 0.76 1.18 T 0.72 0.49 1.00 11.68* +0.68 106
FNTW4 FONTENELLE DAM COOP 0.98 0.19 0.21 0.06 0.55 0.71 0.24 0.41 0.19 0.22 0.71 0.41* 4.88* -2.65 65
KMRW4 KEMMERER 2N COOP 0.85 T 0.00* 0.00* 0.56 T T* 1.20 T 0.33 0.88 0.00* 3.82* -6.53 37
NATRONA COUNTY WY STATIONS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
KCPR CASPER ASOS 1.51 0.39 0.16 0.48 0.23 1.33 1.59 1.28 0.53 1.14 0.72 2.55 11.91* -0.61 95
CSWW4 CASPER 1SW COOP M M M M M M M M M M M M M M M
CWWW4 CASPER WWTP COOP 2.34 0.31 0.25* 0.50 0.16 0.59 1.52 2.69 1.78 1.33 0.98 2.05* 14.50* +2.03 116
MWTW4 MIDWEST COOP 1.74 0.18* 0.12 0.87* 0.12* 0.76* 0.35* 1.92* 0.00* 3.92* 0.00* 0.00* 9.98* -2.56 80
ACVW4 PATHFINDER DAM COOP 0.64 0.36 0.11 0.84 0.16 1.67 0.94 2.26 0.69 0.37 0.02 1.72* 9.78* -1.17 89
PRSW4 POWDER RIVER SCHOOL COOP 1.06 0.40 0.07 M M 0.19* 1.08 1.95 1.44 1.57 0.72 2.22* 10.70* +0.27 103
BCRW4 BATES CREEK COOP 1.28 0.10 0.56 0.89 0.05 0.96 1.54 2.19 1.41 1.94 0.92 M 11.84* -1.17 91
PARK COUNTY WY STATIONS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
KCOD CODY AWOS 0.26* 0.23 T* 0.04* 0.11* 0.62* 1.54 1.35 0.81 0.34 0.25* 0.54* 6.09* M M
COPW4 CODY COOP 0.39 0.49 0.01 0.45 2.11 1.11* 2.57 1.68 1.00 0.59 0.25* 0.00* 10.65* +0.09 101
BLBW4 BUFFALO BILL DAM COOP 0.33 0.45* 0.06 0.62 3.66 1.76 3.19 2.41 1.37 0.63 0.09 2.22* 16.79* +6.15 158
OBAW4 CODY 12SE COOP 0.35 0.19 T 0.45 1.83 0.44 1.63* 1.58 0.94 1.11* T 0.73* 9.25* +0.01 100
CLAW4 CLARK COOP 0.10* 0.11* 0.03 0.19 1.48 0.27 1.27 0.73 0.68 0.57 0.09 0.73* 6.25* -0.95 87
SUNW4 SUNSHINE 5NE COOP M M M M M M M M M M M M M M M
WAPW4 WAPITI 1NE COOP M M M M M M M M M M M M M M M
NFKW4 PAHASKA COOP 1.38 0.90 1.34 1.31 4.72 3.73 2.70 2.47 1.21 0.66 2.61 1.73* 24.76* M M
PFSW4 POWELL FIELD STN COOP 0.19* 0.05* 0.00* 0.04* 0.65 0.49 2.39 1.32 0.98* 0.80* M 0.00* M M M
SUBLETTE COUNTY WY STATIONS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
KBPI BIG PINEY ASOS 0.75 0.05 0.30 0.05* 0.42 1.26 1.04 0.66 0.34 0.98 1.11 0.51 7.47* +0.99 115
BPIW4 BIG PINEY COOP 0.97 0.12 0.47 0.16 0.59 0.88* 1.04 0.60 0.18 0.21 M M 5.22* -1.26 81
BPEW4 BIG PINEY 6NE COOP M M M M M M M M M M M M M M M
BNWW4 BONDURANT COOP 0.50 0.93 3.54 0.87 3.95 2.88 1.22 0.67 0.14 1.29 1.11 0.55* 17.65* -1.11 94
BRSW4 BOULDER REARING STN COOP 0.53* 0.26* 0.48 0.43 0.78 1.10 1.78 0.60 0.25 0.56 0.59 1.11* 8.47* -1.25 87
CORW4 CORA COOP M M M M M M M M M M M M M M M
PNDW4 PINEDALE COOP 0.94 0.41 0.54* 0.36 1.12 1.36 0.84 0.69 0.04 0.63 0.60 1.52* 9.05* -2.35 79
DANW4 DANIEL FISH HATCHERY COOP 0.55 0.36* 1.13 0.47 1.50 0.95 1.55 0.23 0.05* 1.03 1.12* 0.54* 9.48* -2.24 81
SWEETWATER COUNTY WY STATIONS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
KRKS ROCK SPRINGS ASOS 0.71 0.36 0.18 0.05* 0.22 1.23 0.48 0.34 0.02 0.38 0.23 0.54 4.74* -3.82 55
RSFW4 ROCK SPRINGS FD COOP 0.72* 0.32* 0.65* 0.34* 0.28 0.81* 0.34* 0.49 0.08 0.68 0.28 0.80* 5.79* -3.87 60
GRNW4 GREEN RIVER COOP 1.28* 1.20 0.65 0.48 0.93 0.96* 0.49 1.11 0.46 0.40 0.28 1.30 9.54* +1.21 115
FGRW4 FLAMING GORGE COOP M M M M M M M M M M M M M M M
FSNW4 FARSON 2NNE COOP 0.54 0.13 0.11 0.09 0.15 0.38 0.30 0.71 0.24 0.23 0.82 0.50* 4.20* -5.10 45
BITW4 BITTER CREEK 4NE COOP 0.48 0.15 0.06 0.02 0.14 0.66 0.31 0.21 0.24 0.05 0.38 0.63* 3.33* -3.61 48
WMSW4 WAMSUTTER COOP 0.99* 0.26* 0.12* 0.26* 0.29 0.82 0.84 0.71 0.17 M 0.92 0.76* 6.14* -2.04 75
TETON COUNTY WY STATIONS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
KJAC JACKSON AWOS 0.20 0.68 0.95 0.64 1.90 1.43* 0.78 2.07 0.35 0.53 1.12 0.59* 11.24* M M
JFSW4 JACKSON COOP 0.41* 0.81* 1.23* 0.36 2.60 2.21 0.57* 2.64 0.40 0.95 0.75 1.20 14.13* -2.71 84
MOOW4 MOOSE COOP 0.38* 1.80* 0.91* 1.39* 4.93* 1.85* 0.87* 2.54 0.37* 0.17 0.88 0.83* 16.92* -4.88 78
MRAW4 MORAN 5WNW COOP 0.30 1.53* 0.41* 1.10* 5.39* 1.41* 0.95* 2.57* 0.42* 0.69* T* 0.49* 15.26* -9.39 62
DARW4 DARWIN RANCH COOP 0.28 1.11 1.25 0.32 2.42 1.87 1.08 0.60 0.17 0.98 0.75 0.99* 11.82* -4.30 73
ALTW4 ALTA COOP 1.18 1.32 1.60* 0.86 2.48 1.27 1.26 1.82 0.80 0.49 1.57 0.53* 15.18* -10.11 60
WASHAKIE COUNTY WY STATIONS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
KWRL WORLAND ASOS 0.99 0.11 0.09 0.12 T 0.64 1.11 1.61 0.46 0.97 0.06 0.45 6.61 -0.96 87
WORW4 WORLAND COOP 0.86 0.28* 0.02* 0.09 0.24 0.54* 1.34 2.30 0.67 1.54 0.17 0.33* 8.38* +0.56 107
TFRW4 TEN SLEEP 4NE COOP 1.20 0.30 0.27 0.82 0.33 1.12 2.86 2.12 1.95 1.49 0.58 0.33* 13.37* +0.24 102
TNSW4 TEN SLEEP 16SSE COOP 1.11 0.44 0.06 0.67 0.18 M M M 1.00* 0.97 0.13 0.04* 4.60* -8.97 34
YELLOWSTONE NATIONAL PARK STNS PRECIPITATION (INCHES)
SHEF ID STATION OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP TOTAL DIFF % OF NORMAL
KP60 LAKE YELLOWSTONE ASOS 0.60* 1.16 1.33 1.54 2.12* M 2.13* 2.45 0.65 0.74 1.09 1.46 15.27* -5.03 75
LKYW4 LAKE YELLOWSTONE COOP 0.14* 0.88* 0.86* 1.35* 2.94* 1.36* 1.50* 2.38* 0.16* 0.15 0.07* 0.39* 12.18* -8.72 58
OLFW4 OLD FAITHFUL COOP 0.22* 1.98* 0.82* 0.51* 1.52* 2.35* 0.26* M M M M 0.00* M M M
BKRW4 BECHLER RIVER COOP 0.91* M M M M M M M 0.76* 0.43 1.94 1.12 M M M
EYPW4 EAST ENTRANCE COOP 0.00* 0.15* 2.29* 1.65 3.98 0.90* 2.08* M 1.19 0.74 0.92 2.23* 16.13* M M
YLWW4 MAMMOTH COOP 0.44 0.54* 0.63 0.61 1.68 0.51* 1.79 0.87 1.23* 0.39 1.01 0.25* 9.95* -4.46 69
TWRW4 TOWER FALLS RNGR STN COOP 0.11* 0.66 0.74* 0.69* 1.63 0.80* 2.13* 0.71* 0.76 0.53 1.13 1.17* 11.06* -5.36 67
LMRW4 LAMAR RNGR STN COOP 0.49 0.43 0.92 1.40 1.78 0.75 2.13* 0.88 0.95 1.45 1.42 0.43* 13.03* M M
SNKW4 SNAKE RIVER RNGR STN COOP 0.56 2.02* 3.62* 2.06* 8.62 1.39* 2.18* 1.78* 0.39* 0.35* 1.21* 1.41* 25.59* -4.40 85
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