Supercell over Laramie
WRDS/SCO may be working remotely so there could be a slight delay returning phone calls. Please email wrds@uwyo.edu if you are in need of information and we will respond as soon as possible

Wyoming Snow Precipitation Update

United States Natural Resources Water and Climate Center Department of Conservation Portland, Oregon Agriculture Service S N O W - P R E C I P I T A T I O N U P D A T E Based on Mountain Data from NRCS SNOTEL Sites As of TUESDAY: MARCH 17 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.4 14.4 107 15.9 18.8 85 Black Bear 8170 30.2 32.2 94 27.9 33.9 82 Blind Bull Sum 8650 22.6 20.2 112 13.5 17.4 78 Cottonwood Creek 7670 23.5 19.3 122 25.9 21.5 120 East Rim Divide 7930 10.9 9.5 115 8.7 10.4 84 Grand Targhee 9260 36.8 32.7 113 26.2 26.7 98 Granite Creek 6770 15.9 14.9 107 14.6 17.9 82 Grassy Lake 7265 29.2 28.9 101 28.9 32.2 90 Gros Ventre Summit 8750 11.0 11.3 97 10.7 11.2 96 Gunsight Pass 9820 11.5 11.9 97 11.4 12.0 95 Lewis Lake Divide 7850 22.8 27.4 83 26.0 31.6 82 Phillips Bench 8200 26.7 22.0 121 25.7 24.9 103 Salt River Summit 7640 13.5 11.8 114 13.7 14.7 93 Snake River Station 6920 15.7 15.2 103 18.2 20.1 91 Spring Creek Divide 9000 22.9 20.5 112 21.7 21.1 103 Thumb Divide 7980 14.0 13.8 101 13.7 16.2 85 Togwotee Pass 9580 24.9 20.3 123 23.8 21.4 111 Two Ocean Plateau 9240 26.7 23.7 113 21.6 24.0 90 Willow Creek 8080 32.4 25.2 129 30.7 29.4 104 Younts Peak 8350 16.0 13.1 122 12.6 13.9 91 ----- ----- Basin Index (%) 109 93 MADISON-GALLATIN Black Bear 8170 30.2 32.2 94 27.9 33.9 82 Canyon 7870 13.1 11.7 112 13.2 14.3 92 Madison Plateau 7750 19.2 19.9 96 16.9 23.3 73 West Yellowstone 6700 10.6 9.9 107 8.4 12.6 67 Whiskey Creek 6800 13.9 13.8 101 15.7 17.9 88 ----- ----- Basin Index (%) 99 80 YELLOWSTONE Beartooth Lake 9360 20.1 18.8 107 18.7 17.4 107 Burnt Mtn 5880 6.8 4.4 155 11.6 10.6 109 Canyon 7870 13.1 11.7 112 13.2 14.3 92 Cole Creek 7850 15.2 11.7 130 12.0 10.3 117 Evening Star 9200 24.7 21.8 113 26.8 24.0 112 Fisher Creek 9100 28.3 28.0 101 29.0 28.1 103 Northeast Entrance 7350 10.0 8.8 114 11.2 10.8 104 Parker Peak 9400 23.2 17.3 134 21.2 15.4 138 Sylvan Lake 8420 18.9 17.8 106 20.6 19.6 105 Thumb Divide 7980 14.0 13.8 101 13.7 16.2 85 Two Ocean Plateau 9240 26.7 23.7 113 21.6 24.0 90 White Mill 8700 23.2 19.6 118 19.4 20.9 93 Wolverine 7650 12.1 8.8 138 11.8 10.8 109 Younts Peak 8350 16.0 13.1 122 12.6 13.9 91 ----- ----- Basin Index (%) 115 103 WIND RIVER Burroughs Creek 8750 11.1 -M * 12.7 -M * Castle Creek 8400 5.0 -M * 5.8 -M * Cold Springs 9630 6.8 6.2 110 6.2 8.3 75 Deer Park 9700 11.0 12.6 87 9.7 16.8 58 Hobbs Park 10100 11.7 11.4 103 9.8 10.8 91 Kirwin 9550 10.3 8.3 124 9.0 9.7 93 Little Warm 9370 10.4 9.1 114 8.5 10.9 78 Owl Creek 8975 5.9 4.5 131 6.2 4.8 129 South Pass 9040 9.7 13.2 73 8.5 15.0 57 St. Lawrence Alt 8620 4.7 5.9 80 6.3 7.3 86 Togwotee Pass 9580 24.9 20.3 123 23.8 21.4 111 Townsend Creek 8700 7.9 7.9 100 8.1 9.8 83 ----- ----- Basin Index (%) 104 84 BIGHORN BASIN Bald Mtn. 9380 19.4 16.3 119 15.0 14.5 103 Bear Trap Meadow 8200 8.7 4.9 178 8.7 6.8 128 Bone Springs Div 9350 15.9 13.8 115 13.0 13.1 99 Grave Springs 8550 9.3 7.9 118 9.7 8.7 111 Kirwin 9550 10.3 8.3 124 9.0 9.7 93 Marquette 8760 6.3 -M * 7.9 -M * Middle Powder 7760 11.8 9.3 127 11.2 9.7 115 Owl Creek 8975 5.9 4.5 131 6.2 4.8 129 Powder River Pass 9480 11.7 8.9 131 11.8 10.6 111 Shell Creek 9580 13.8 12.6 110 13.1 11.6 113 Timber Creek 7950 5.4 4.2 129 6.2 5.9 105 ----- ----- Basin Index (%) 124 109 SHOSHONE RIVER Blackwater 9780 19.6 20.2 97 20.1 17.8 113 Evening Star 9200 24.7 21.8 113 26.8 24.0 112 Marquette 8760 6.3 -M * 7.9 -M * Sylvan Lake 8420 18.9 17.8 106 20.6 19.6 105 Sylvan Road 7120 11.2 10.3 109 -M 14.9 * Younts Peak 8350 16.0 13.1 122 12.6 13.9 91 ----- ----- Basin Index (%) 109 106 POWDER RIVER Bear Trap Meadow 8200 8.7 4.9 178 8.7 6.8 128 Cloud Peak Reservoir 9860 13.3 12.5 106 12.3 10.8 114 Grave Springs 8550 9.3 7.9 118 9.7 8.7 111 Hansen Sawmill 8360 6.7 5.5 122 7.8 6.9 113 Middle Powder 7760 11.8 9.3 127 11.2 9.7 115 Powder River Pass 9480 11.7 8.9 131 11.8 10.6 111 Soldier Park 8720 6.4 -M * 7.9 -M * ----- ----- Basin Index (%) 126 115 TONGUE RIVER Big Goose 7990 8.4 7.5 112 9.3 8.8 106 Bone Springs Div 9350 15.9 13.8 115 13.0 13.1 99 Burgess Junction 7880 10.4 9.4 111 11.4 10.1 113 Dome Lake 8880 12.6 9.9 127 8.8 11.1 79 Little Goose 8870 10.2 -M * 7.8 -M * Sucker Creek 8880 12.7 10.6 120 11.8 11.8 100 Tie Creek 6870 7.8 4.8 162 11.8 9.5 124 ----- ----- Basin Index (%) 121 103 BELLE FOURCHE Blind Park 6890 7.4 7.2 103 7.6 10.3 74 Cole Canyon 5910 -M 5.4 * -M 7.8 * ----- ----- Basin Index (%) 103 74 CHEYENNE RIVER BASIN Blind Park 6890 7.4 7.2 103 7.6 10.3 74 North Rapid Creek 6130 7.4 6.4 116 7.6 8.4 90 ----- ----- Basin Index (%) 109 81 UPPER N. PLATTE Arapaho Ridge 10960 20.8 18.0 116 20.0 19.1 105 Blackhall Mtn 9820 27.1 -M * 26.1 -M * Columbine 9160 30.4 21.7 140 26.7 22.5 119 Divide Peak 8880 18.7 17.4 107 19.4 18.6 104 Joe Wright 10120 19.7 18.8 105 24.1 22.3 108 Laprele Creek 8375 11.3 9.0 126 11.6 10.5 110 Med Bow 10500 40.0 -M * 32.1 -M * Never Summer 10280 18.0 17.5 103 13.4 -M * North French Creek 10130 30.9 24.3 127 29.5 23.2 127 Old Battle 10000 28.1 26.1 108 26.0 30.8 84 Rawah 9020 11.6 9.2 126 13.3 11.7 114 Sage Creek Basin 7850 14.4 11.7 123 11.1 12.8 87 Sand Lake 10050 26.4 23.9 110 24.3 21.1 115 South Brush Creek 8440 12.6 11.1 114 12.0 13.0 92 Tower 10500 42.4 39.3 108 38.3 35.1 109 Webber Springs 9250 19.9 20.8 96 21.8 23.3 94 Whiskey Park 8950 31.1 24.0 130 29.0 24.5 118 Willow Creek Pass 9540 11.9 10.7 111 11.3 11.5 98 Zirkel 9340 27.1 25.7 105 28.3 25.0 113 ----- ----- Basin Index (%) 114 107 SWEETWATER Deer Park 9700 11.0 12.6 87 9.7 16.8 58 Larsen Creek 9000 5.1 10.9 47 6.8 -M * South Pass 9040 9.7 13.2 73 8.5 15.0 57 ----- ----- Basin Index (%) 70 57 LOWER N. PLATTE Casper Mtn. 7900 14.6 11.9 123 9.8 12.4 79 Laprele Creek 8375 11.3 9.0 126 11.6 10.5 110 Reno Hill 8400 15.5 11.7 132 15.7 12.5 126 Windy Peak 7900 9.1 6.8 134 8.0 8.8 91 ----- ----- Basin Index (%) 128 102 LARAMIE RIVER Brooklyn Lake 10240 24.9 17.5 142 23.9 18.0 133 Cinnabar Park 9574 21.9 17.8 123 23.5 21.1 111 Crow Creek 8330 7.1 7.1 100 9.6 8.7 110 Deadman Hill 10220 16.5 13.6 121 14.5 14.5 100 Rawah 9020 11.6 9.2 126 13.3 11.7 114 Roach 9700 13.8 13.7 101 14.0 16.5 85 Windy Peak 7900 9.1 6.8 134 8.0 8.8 91 ----- ----- Basin Index (%) 122 108 S. PLATTE Black Mountain 8920 9.2 -M * 11.3 -M * Crow Creek 8330 7.1 7.1 100 9.6 8.7 110 Deadman Hill 10220 16.5 13.6 121 14.5 14.5 100 ----- ----- Basin Index (%) 114 104 LITTLE SNAKE RIVER Battle Mountain 7440 12.1 11.1 109 13.0 13.3 98 Divide Peak 8880 18.7 17.4 107 19.4 18.6 104 Elk River 8700 19.7 17.3 114 16.4 17.6 93 Little Snake River 8915 25.4 20.7 123 29.8 26.2 114 Old Battle 10000 28.1 26.1 108 26.0 30.8 84 Sage Creek Basin 7850 14.4 11.7 123 11.1 12.8 87 Sandstone RS 8150 15.5 11.7 132 14.2 16.4 87 Whiskey Park 8950 31.1 24.0 130 29.0 24.5 118 ----- ----- Basin Index (%) 118 99 UPPER GREEN RIVER Big Sandy Opening 9080 8.3 11.3 73 7.1 11.6 61 Blind Bull Sum 8650 22.6 20.2 112 13.5 17.4 78 East Rim Divide 7930 10.9 9.5 115 8.7 10.4 84 Elkhart Park G.S. 9400 9.5 10.5 90 9.3 11.6 80 Gros Ventre Summit 8750 11.0 11.3 97 10.7 11.2 96 Gunsight Pass 9820 11.5 11.9 97 11.4 12.0 95 Indian Creek 9425 20.1 20.9 96 14.0 19.7 71 Kendall R.S. 7740 9.4 11.0 85 9.4 12.8 73 Loomis Park 8240 13.3 13.1 102 15.9 15.3 104 New Fork Lake 8340 9.8 9.2 107 -M 9.6 * Pocket Creek 9360 -M -M * 6.9 -M * Snider Basin 8060 11.9 10.9 109 12.6 12.6 100 Spring Creek Divide 9000 22.9 20.5 112 21.7 21.1 103 Triple Peak 8500 24.0 19.2 125 23.7 22.3 106 ----- ----- Basin Index (%) 103 89 LOWER GREEN RIVER Blacks Fork Jct 8869 7.4 -M * 10.6 -M * Buck Pasture 9632 16.2 -M * 15.3 -M * EF Blacks Fork GS 9360 13.1 -M * -M -M * Hams Fork 7840 11.1 10.2 109 9.8 10.0 98 Hewinta 9500 9.7 9.4 103 12.9 12.0 108 Hickerson Park 9122 10.3 6.6 156 9.9 8.6 115 Hole-in-Rock 9168 9.8 6.4 153 9.7 8.1 120 Indian Creek 9425 20.1 20.9 96 14.0 19.7 71 Kelley R.S. 8180 13.7 13.1 105 14.2 15.9 89 Spirit Lk 10235 15.6 -M * 16.3 -M * Steel Creek Park 10158 15.1 13.2 114 15.8 14.0 113 ----- ----- Basin Index (%) 113 98 UPPER BEAR RIVER Bear River RS 8777 8.5 -M * 9.7 -M * Bug Lake 7987 16.8 16.5 102 15.5 17.1 91 Burts Miller Ranch 8000 5.4 -M * 6.3 -M * Chalk Creek #1 9171 17.8 20.6 86 16.3 21.7 75 Hayden Fork 9130 14.4 14.1 102 18.0 18.2 99 Kelley R.S. 8180 13.7 13.1 105 14.2 15.9 89 Lily Lake 9133 10.5 11.4 92 10.8 14.7 73 Monte Cristo 8932 24.5 23.9 103 21.2 22.7 93 Salt River Summit 7640 13.5 11.8 114 13.7 14.7 93 Spring Creek Divide 9000 22.9 20.5 112 21.7 21.1 103 ----- ----- Basin Index (%) 102 90 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100. ---------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100.