Supercell over Laramie
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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 MONDAY: MARCH 9 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.8 13.8 100 14.3 18.1 79 Black Bear 8170 27.7 31.2 89 26.0 32.8 79 Blind Bull Sum 8650 21.2 19.1 111 12.5 16.8 74 Cottonwood Creek 7670 23.2 18.3 127 24.6 20.6 119 East Rim Divide 7930 10.6 9.3 114 8.3 10.1 82 Grand Targhee 9260 34.1 31.5 108 24.4 25.4 96 Granite Creek 6770 14.0 14.5 97 13.0 17.4 75 Grassy Lake 7265 26.8 27.3 98 26.8 31.0 86 Gros Ventre Summit 8750 9.8 10.7 92 9.5 10.8 88 Gunsight Pass 9820 10.7 11.5 93 10.7 11.5 93 Lewis Lake Divide 7850 20.5 26.1 79 23.9 30.5 78 Phillips Bench 8200 23.7 20.9 113 23.0 24.0 96 Salt River Summit 7640 13.0 11.0 118 13.0 14.1 92 Snake River Station 6920 14.2 15.0 95 16.7 19.5 86 Spring Creek Divide 9000 21.9 19.5 112 21.0 20.3 103 Thumb Divide 7980 12.1 13.0 93 11.9 15.6 76 Togwotee Pass 9580 22.8 19.3 118 21.9 20.5 107 Two Ocean Plateau 9240 24.2 22.7 107 19.7 23.1 85 Willow Creek 8080 30.2 24.0 126 29.2 28.1 104 Younts Peak 8350 14.9 12.2 122 12.0 13.3 90 ----- ----- Basin Index (%) 105 90 MADISON-GALLATIN Black Bear 8170 27.7 31.2 89 26.0 32.8 79 Canyon 7870 11.6 11.4 102 11.6 13.9 83 Madison Plateau 7750 17.3 19.0 91 15.1 22.6 67 West Yellowstone 6700 9.4 9.5 99 7.8 12.3 63 Whiskey Creek 6800 12.5 13.0 96 14.4 17.2 84 ----- ----- Basin Index (%) 93 76 YELLOWSTONE Beartooth Lake 9360 18.9 18.1 104 17.5 16.7 105 Burnt Mtn 5880 5.6 4.4 127 10.3 10.0 103 Canyon 7870 11.6 11.4 102 11.6 13.9 83 Cole Creek 7850 14.4 11.0 131 10.9 9.8 111 Evening Star 9200 23.1 20.6 112 25.1 23.2 108 Fisher Creek 9100 26.3 26.7 99 27.1 26.9 101 Northeast Entrance 7350 9.2 8.6 107 10.3 10.4 99 Parker Peak 9400 21.6 16.5 131 19.8 14.8 134 Sylvan Lake 8420 17.2 16.8 102 19.0 18.9 101 Thumb Divide 7980 12.1 13.0 93 11.9 15.6 76 Two Ocean Plateau 9240 24.2 22.7 107 19.7 23.1 85 White Mill 8700 21.3 19.0 112 17.6 20.1 88 Wolverine 7650 11.4 9.0 127 11.2 10.4 108 Younts Peak 8350 14.9 12.2 122 12.0 13.3 90 ----- ----- Basin Index (%) 110 99 WIND RIVER Burroughs Creek 8750 10.2 -M * 11.5 -M * Castle Creek 8400 4.6 -M * 5.3 -M * Cold Springs 9630 6.4 5.8 110 6.0 7.9 76 Deer Park 9700 10.4 11.8 88 9.4 16.1 58 Hobbs Park 10100 11.0 10.8 102 9.4 10.2 92 Kirwin 9550 9.4 7.6 124 8.3 9.3 89 Little Warm 9370 9.5 8.6 110 7.7 10.4 74 Owl Creek 8975 5.5 4.3 128 5.8 4.5 129 South Pass 9040 9.3 12.4 75 8.3 14.4 58 St. Lawrence Alt 8620 4.4 5.8 76 6.0 6.9 87 Togwotee Pass 9580 22.8 19.3 118 21.9 20.5 107 Townsend Creek 8700 7.8 7.3 107 8.0 9.2 87 ----- ----- Basin Index (%) 103 83 BIGHORN BASIN Bald Mtn. 9380 18.8 15.9 118 14.8 13.8 107 Bear Trap Meadow 8200 8.3 4.6 180 8.4 6.5 129 Bone Springs Div 9350 15.2 13.2 115 12.5 12.4 101 Grave Springs 8550 9.2 7.3 126 9.6 8.2 117 Kirwin 9550 9.4 7.6 124 8.3 9.3 89 Marquette 8760 5.8 -M * 7.4 -M * Middle Powder 7760 11.3 8.7 130 11.0 9.2 120 Owl Creek 8975 5.5 4.3 128 5.8 4.5 129 Powder River Pass 9480 11.1 8.3 134 11.3 10.1 112 Shell Creek 9580 13.0 12.2 107 12.4 11.1 112 Timber Creek 7950 5.1 4.0 128 5.9 5.5 107 ----- ----- Basin Index (%) 124 110 SHOSHONE RIVER Blackwater 9780 18.4 18.8 98 18.7 17.0 110 Evening Star 9200 23.1 20.6 112 25.1 23.2 108 Marquette 8760 5.8 -M * 7.4 -M * Sylvan Lake 8420 17.2 16.8 102 19.0 18.9 101 Sylvan Road 7120 10.4 10.0 104 -M 14.6 * Younts Peak 8350 14.9 12.2 122 12.0 13.3 90 ----- ----- Basin Index (%) 107 103 POWDER RIVER Bear Trap Meadow 8200 8.3 4.6 180 8.4 6.5 129 Cloud Peak Reservoir 9860 12.3 11.5 107 11.7 10.2 115 Grave Springs 8550 9.2 7.3 126 9.6 8.2 117 Hansen Sawmill 8360 6.3 5.1 124 7.2 6.5 111 Middle Powder 7760 11.3 8.7 130 11.0 9.2 120 Powder River Pass 9480 11.1 8.3 134 11.3 10.1 112 Soldier Park 8720 5.7 -M * 7.5 -M * ----- ----- Basin Index (%) 129 117 TONGUE RIVER Big Goose 7990 7.7 6.7 115 8.5 8.3 102 Bone Springs Div 9350 15.2 13.2 115 12.5 12.4 101 Burgess Junction 7880 10.0 9.1 110 11.1 9.6 116 Dome Lake 8880 11.7 9.3 126 8.3 10.5 79 Little Goose 8870 9.2 -M * 7.3 -M * Sucker Creek 8880 12.0 9.9 121 11.5 11.2 103 Tie Creek 6870 7.6 4.7 162 11.5 8.9 129 ----- ----- Basin Index (%) 121 104 BELLE FOURCHE Blind Park 6890 7.2 6.7 107 7.7 9.9 78 Cole Canyon 5910 -M 5.0 * -M 7.3 * ----- ----- Basin Index (%) 107 78 CHEYENNE RIVER BASIN Blind Park 6890 7.2 6.7 107 7.7 9.9 78 North Rapid Creek 6130 7.2 6.2 116 7.4 8.0 92 ----- ----- Basin Index (%) 112 84 UPPER N. PLATTE Arapaho Ridge 10960 19.3 17.5 110 18.7 18.5 101 Blackhall Mtn 9820 25.4 -M * 24.9 -M * Columbine 9160 28.9 20.9 138 25.8 21.4 121 Divide Peak 8880 18.4 16.8 110 19.0 17.8 107 Joe Wright 10120 18.7 18.2 103 23.0 21.2 108 Laprele Creek 8375 11.2 8.3 135 11.4 9.9 115 Med Bow 10500 38.4 -M * 30.7 -M * Never Summer 10280 16.7 16.8 99 12.5 -M * North French Creek 10130 30.0 22.5 133 28.5 22.2 128 Old Battle 10000 26.8 25.3 106 24.6 29.4 84 Rawah 9020 11.2 9.2 122 12.8 11.4 112 Sage Creek Basin 7850 14.1 11.3 125 10.9 12.3 89 Sand Lake 10050 25.7 22.3 115 23.5 20.1 117 South Brush Creek 8440 11.9 11.1 107 11.7 12.4 94 Tower 10500 39.8 37.9 105 36.3 33.6 108 Webber Springs 9250 18.9 20.0 94 20.6 22.3 92 Whiskey Park 8950 30.1 23.0 131 28.2 23.6 119 Willow Creek Pass 9540 11.1 10.2 109 10.6 10.9 97 Zirkel 9340 25.6 25.0 102 27.1 24.1 112 ----- ----- Basin Index (%) 113 107 SWEETWATER Deer Park 9700 10.4 11.8 88 9.4 16.1 58 Larsen Creek 9000 -M 10.2 * 6.5 -M * South Pass 9040 9.3 12.4 75 8.3 14.4 58 ----- ----- Basin Index (%) 81 58 LOWER N. PLATTE Casper Mtn. 7900 14.2 11.3 126 9.5 11.8 81 Laprele Creek 8375 11.2 8.3 135 11.4 9.9 115 Reno Hill 8400 14.8 11.1 133 15.2 11.9 128 Windy Peak 7900 9.0 6.4 141 7.7 8.4 92 ----- ----- Basin Index (%) 133 104 LARAMIE RIVER Brooklyn Lake 10240 24.0 16.5 145 23.0 17.2 134 Cinnabar Park 9574 21.4 17.7 121 23.1 20.6 112 Crow Creek 8330 6.9 7.0 99 9.4 8.4 112 Deadman Hill 10220 15.6 12.8 122 13.8 13.7 101 Rawah 9020 11.2 9.2 122 12.8 11.4 112 Roach 9700 12.5 13.2 95 12.8 15.7 82 Windy Peak 7900 9.0 6.4 141 7.7 8.4 92 ----- ----- Basin Index (%) 121 108 S. PLATTE Black Mountain 8920 8.8 -M * 11.1 -M * Crow Creek 8330 6.9 7.0 99 9.4 8.4 112 Deadman Hill 10220 15.6 12.8 122 13.8 13.7 101 ----- ----- Basin Index (%) 114 105 LITTLE SNAKE RIVER Battle Mountain 7440 12.6 10.4 121 12.9 12.8 101 Divide Peak 8880 18.4 16.8 110 19.0 17.8 107 Elk River 8700 18.4 16.7 110 15.7 16.9 93 Little Snake River 8915 24.3 20.2 120 28.9 25.7 112 Old Battle 10000 26.8 25.3 106 24.6 29.4 84 Sage Creek Basin 7850 14.1 11.3 125 10.9 12.3 89 Sandstone RS 8150 14.9 11.8 126 13.9 15.8 88 Whiskey Park 8950 30.1 23.0 131 28.2 23.6 119 ----- ----- Basin Index (%) 118 100 UPPER GREEN RIVER Big Sandy Opening 9080 7.9 10.6 75 6.7 11.1 60 Blind Bull Sum 8650 21.2 19.1 111 12.5 16.8 74 East Rim Divide 7930 10.6 9.3 114 8.3 10.1 82 Elkhart Park G.S. 9400 9.0 10.0 90 8.8 11.1 79 Gros Ventre Summit 8750 9.8 10.7 92 9.5 10.8 88 Gunsight Pass 9820 10.7 11.5 93 10.7 11.5 93 Indian Creek 9425 19.3 20.0 96 13.8 18.8 73 Kendall R.S. 7740 8.9 10.4 86 8.9 12.4 72 Loomis Park 8240 12.5 12.5 100 15.3 14.8 103 New Fork Lake 8340 9.2 8.9 103 7.3 9.2 79 Pocket Creek 9360 -M -M * 6.6 -M * Snider Basin 8060 12.0 10.5 114 12.3 12.1 102 Spring Creek Divide 9000 21.9 19.5 112 21.0 20.3 103 Triple Peak 8500 22.5 18.3 123 22.6 21.4 106 ----- ----- Basin Index (%) 102 87 LOWER GREEN RIVER Blacks Fork Jct 8869 7.0 -M * 10.4 -M * Buck Pasture 9632 15.5 -M * 14.9 -M * EF Blacks Fork GS 9360 12.5 -M * 8.2 -M * Hams Fork 7840 11.3 9.9 114 9.7 9.6 101 Hewinta 9500 9.5 8.6 110 12.3 11.4 108 Hickerson Park 9122 9.4 6.3 149 9.6 8.0 120 Hole-in-Rock 9168 9.3 6.0 155 9.2 7.5 123 Indian Creek 9425 19.3 20.0 96 13.8 18.8 73 Kelley R.S. 8180 13.4 12.6 106 14.0 15.3 92 Spirit Lk 10235 14.3 -M * 15.3 -M * Steel Creek Park 10158 14.6 12.4 118 15.4 13.1 118 ----- ----- Basin Index (%) 115 100 UPPER BEAR RIVER Bear River RS 8777 8.1 -M * 9.5 -M * Bug Lake 7987 17.0 15.9 107 15.3 16.2 94 Burts Miller Ranch 8000 5.8 -M * 6.1 -M * Chalk Creek #1 9171 17.4 19.6 89 16.1 20.6 78 Hayden Fork 9130 13.8 13.0 106 17.4 17.2 101 Kelley R.S. 8180 13.4 12.6 106 14.0 15.3 92 Lily Lake 9133 10.4 10.9 95 10.6 14.0 76 Monte Cristo 8932 24.0 22.7 106 21.2 21.5 99 Salt River Summit 7640 13.0 11.0 118 13.0 14.1 92 Spring Creek Divide 9000 21.9 19.5 112 21.0 20.3 103 ----- ----- Basin Index (%) 105 92 ----------------------------------------------------------------------------- -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.