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 TUESDAY: MARCH 3 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.4 13.6 99 14.0 17.4 80 Black Bear 8170 26.4 29.9 88 24.7 31.3 79 Blind Bull Sum 8650 20.9 18.2 115 12.3 16.1 76 Cottonwood Creek 7670 22.9 17.2 133 24.0 19.8 121 East Rim Divide 7930 10.3 8.3 124 8.1 9.6 84 Grand Targhee 9260 33.9 30.5 111 23.9 25.0 96 Granite Creek 6770 13.8 13.9 99 -M 16.6 * Grassy Lake 7265 26.0 26.4 98 26.1 29.8 88 Gros Ventre Summit 8750 9.3 10.0 93 9.2 10.2 90 Gunsight Pass 9820 10.6 10.7 99 10.6 10.9 97 Lewis Lake Divide 7850 20.1 25.3 79 23.4 29.2 80 Phillips Bench 8200 23.4 19.9 118 22.7 23.0 99 Salt River Summit 7640 12.7 10.7 119 12.9 13.6 95 Snake River Station 6920 13.9 14.4 97 16.3 18.8 87 Spring Creek Divide 9000 21.7 18.8 115 20.6 19.5 106 Thumb Divide 7980 11.5 12.4 93 11.6 14.8 78 Togwotee Pass 9580 22.5 18.1 124 21.6 19.6 110 Two Ocean Plateau 9240 23.3 21.7 107 19.0 21.9 87 Willow Creek 8080 29.2 22.6 129 28.6 27.1 106 Younts Peak 8350 14.5 11.7 124 11.7 12.8 91 ----- ----- Basin Index (%) 107 92 MADISON-GALLATIN Black Bear 8170 26.4 29.9 88 24.7 31.3 79 Canyon 7870 11.0 10.7 103 11.3 13.2 86 Madison Plateau 7750 16.4 18.0 91 14.2 21.5 66 West Yellowstone 6700 8.8 9.1 97 7.5 11.7 64 Whiskey Creek 6800 11.7 12.1 97 13.4 16.5 81 ----- ----- Basin Index (%) 93 75 YELLOWSTONE Beartooth Lake 9360 18.3 17.1 107 16.9 15.9 106 Burnt Mtn 5880 5.6 4.1 137 10.7 9.6 111 Canyon 7870 11.0 10.7 103 11.3 13.2 86 Cole Creek 7850 14.6 10.2 143 10.7 9.2 116 Evening Star 9200 22.4 19.4 115 24.3 22.3 109 Fisher Creek 9100 25.4 26.0 98 26.1 25.8 101 Northeast Entrance 7350 8.9 8.3 107 10.1 10.0 101 Parker Peak 9400 21.0 16.2 130 19.3 14.2 136 Sylvan Lake 8420 16.9 16.0 106 18.6 18.1 103 Thumb Divide 7980 11.5 12.4 93 11.6 14.8 78 Two Ocean Plateau 9240 23.3 21.7 107 19.0 21.9 87 White Mill 8700 20.8 18.5 112 17.0 19.2 89 Wolverine 7650 11.5 8.6 134 11.0 10.1 109 Younts Peak 8350 14.5 11.7 124 11.7 12.8 91 ----- ----- Basin Index (%) 112 101 WIND RIVER Burroughs Creek 8750 10.2 -M * 11.3 -M * Castle Creek 8400 4.6 -M * 5.3 -M * Cold Springs 9630 6.4 5.6 114 5.9 7.5 79 Deer Park 9700 10.2 10.9 94 9.1 15.4 59 Hobbs Park 10100 10.9 9.9 110 9.2 9.6 96 Kirwin 9550 9.4 7.1 132 8.1 8.9 91 Little Warm 9370 9.4 8.1 116 7.5 9.9 76 Owl Creek 8975 5.5 4.0 138 5.7 4.4 130 South Pass 9040 9.2 11.6 79 8.1 13.6 60 St. Lawrence Alt 8620 4.6 5.3 87 5.9 6.6 89 Togwotee Pass 9580 22.5 18.1 124 21.6 19.6 110 Townsend Creek 8700 7.7 6.7 115 7.7 8.7 89 ----- ----- Basin Index (%) 110 85 BIGHORN BASIN Bald Mtn. 9380 18.5 15.0 123 14.1 13.3 106 Bear Trap Meadow 8200 8.3 4.5 184 8.2 6.2 132 Bone Springs Div 9350 14.7 12.3 120 12.1 11.9 102 Grave Springs 8550 9.2 7.0 131 9.6 8.0 120 Kirwin 9550 9.4 7.1 132 8.1 8.9 91 Marquette 8760 6.0 -M * 7.5 -M * Middle Powder 7760 11.3 8.2 138 10.9 8.8 124 Owl Creek 8975 5.5 4.0 138 5.7 4.4 130 Powder River Pass 9480 11.1 8.0 139 10.9 9.7 112 Shell Creek 9580 12.6 11.8 107 12.1 10.7 113 Timber Creek 7950 5.2 3.9 133 5.9 5.3 111 ----- ----- Basin Index (%) 129 112 SHOSHONE RIVER Blackwater 9780 18.0 17.5 103 18.3 16.3 112 Evening Star 9200 22.4 19.4 115 24.3 22.3 109 Marquette 8760 6.0 -M * 7.5 -M * Sylvan Lake 8420 16.9 16.0 106 18.6 18.1 103 Sylvan Road 7120 10.4 9.6 108 -M 14.0 * Younts Peak 8350 14.5 11.7 124 11.7 12.8 91 ----- ----- Basin Index (%) 111 105 POWDER RIVER Bear Trap Meadow 8200 8.3 4.5 184 8.2 6.2 132 Cloud Peak Reservoir 9860 11.8 10.5 112 11.1 9.7 114 Grave Springs 8550 9.2 7.0 131 9.6 8.0 120 Hansen Sawmill 8360 6.2 4.7 132 7.2 6.2 116 Middle Powder 7760 11.3 8.2 138 10.9 8.8 124 Powder River Pass 9480 11.1 8.0 139 10.9 9.7 112 Soldier Park 8720 4.8 -M * 7.2 -M * ----- ----- Basin Index (%) 135 119 TONGUE RIVER Big Goose 7990 7.5 6.3 119 8.5 8.0 106 Bone Springs Div 9350 14.7 12.3 120 12.1 11.9 102 Burgess Junction 7880 9.8 8.4 117 10.9 9.1 120 Dome Lake 8880 11.0 8.8 125 8.1 10.0 81 Little Goose 8870 9.1 -M * 7.0 -M * Sucker Creek 8880 11.9 9.1 131 11.0 10.7 103 Tie Creek 6870 7.7 4.4 175 11.4 8.6 133 ----- ----- Basin Index (%) 127 106 BELLE FOURCHE Blind Park 6890 7.5 6.4 117 7.5 9.5 79 Cole Canyon 5910 -M 4.9 * -M 7.2 * ----- ----- Basin Index (%) 117 79 CHEYENNE RIVER BASIN Blind Park 6890 7.5 6.4 117 7.5 9.5 79 North Rapid Creek 6130 6.9 6.0 115 7.2 7.7 94 ----- ----- Basin Index (%) 116 85 UPPER N. PLATTE Arapaho Ridge 10960 19.2 16.9 114 18.4 17.9 103 Blackhall Mtn 9820 25.1 -M * 24.4 -M * Columbine 9160 27.6 20.1 137 24.8 20.6 120 Divide Peak 8880 17.9 16.1 111 18.6 16.9 110 Joe Wright 10120 18.4 16.9 109 22.8 20.1 113 Laprele Creek 8375 11.0 7.8 141 11.3 9.4 120 Med Bow 10500 37.9 -M * 30.6 -M * Never Summer 10280 16.7 16.3 102 12.3 -M * North French Creek 10130 29.5 21.2 139 28.4 21.2 134 Old Battle 10000 26.3 24.2 109 24.2 28.1 86 Rawah 9020 11.2 8.8 127 12.7 11.0 115 Sage Creek Basin 7850 13.8 10.7 129 10.8 11.8 92 Sand Lake 10050 25.2 21.3 118 23.2 19.1 121 South Brush Creek 8440 11.7 10.4 112 11.6 11.8 98 Tower 10500 39.4 36.7 107 35.3 32.3 109 Webber Springs 9250 18.6 18.9 98 20.0 21.3 94 Whiskey Park 8950 29.7 21.8 136 27.9 22.6 123 Willow Creek Pass 9540 11.1 9.7 114 10.5 10.5 100 Zirkel 9340 24.9 23.3 107 26.7 23.6 113 ----- ----- Basin Index (%) 117 110 SWEETWATER Deer Park 9700 10.2 10.9 94 9.1 15.4 59 Larsen Creek 9000 4.7 9.7 48 6.4 -M * South Pass 9040 9.2 11.6 79 8.1 13.6 60 ----- ----- Basin Index (%) 75 59 LOWER N. PLATTE Casper Mtn. 7900 14.2 10.4 137 9.5 11.2 85 Laprele Creek 8375 11.0 7.8 141 11.3 9.4 120 Reno Hill 8400 14.7 10.3 143 14.9 11.2 133 Windy Peak 7900 8.8 5.8 152 7.3 7.8 94 ----- ----- Basin Index (%) 142 109 LARAMIE RIVER Brooklyn Lake 10240 23.6 15.3 154 22.7 16.2 140 Cinnabar Park 9574 21.2 17.3 123 23.0 19.8 116 Crow Creek 8330 7.0 6.8 103 9.2 7.9 116 Deadman Hill 10220 15.5 12.5 124 13.7 12.9 106 Rawah 9020 11.2 8.8 127 12.7 11.0 115 Roach 9700 12.4 12.6 98 12.3 14.8 83 Windy Peak 7900 8.8 5.8 152 7.3 7.8 94 ----- ----- Basin Index (%) 126 112 S. PLATTE Black Mountain 8920 9.1 -M * 11.0 -M * Crow Creek 8330 7.0 6.8 103 9.2 7.9 116 Deadman Hill 10220 15.5 12.5 124 13.7 12.9 106 ----- ----- Basin Index (%) 117 110 LITTLE SNAKE RIVER Battle Mountain 7440 12.5 9.9 126 12.6 12.2 103 Divide Peak 8880 17.9 16.1 111 18.6 16.9 110 Elk River 8700 18.4 15.8 116 15.5 16.1 96 Little Snake River 8915 24.2 19.8 122 28.4 25.2 113 Old Battle 10000 26.3 24.2 109 24.2 28.1 86 Sage Creek Basin 7850 13.8 10.7 129 10.8 11.8 92 Sandstone RS 8150 14.7 10.7 137 13.7 15.2 90 Whiskey Park 8950 29.7 21.8 136 27.9 22.6 123 ----- ----- Basin Index (%) 122 102 UPPER GREEN RIVER Big Sandy Opening 9080 7.8 10.2 76 6.6 10.6 62 Blind Bull Sum 8650 20.9 18.2 115 12.3 16.1 76 East Rim Divide 7930 10.3 8.3 124 8.1 9.6 84 Elkhart Park G.S. 9400 8.9 9.5 94 8.5 10.6 80 Gros Ventre Summit 8750 9.3 10.0 93 9.2 10.2 90 Gunsight Pass 9820 10.6 10.7 99 10.6 10.9 97 Indian Creek 9425 19.1 19.1 100 13.6 18.0 76 Kendall R.S. 7740 8.8 9.9 89 8.7 11.8 74 Loomis Park 8240 12.4 11.9 104 15.0 14.2 106 New Fork Lake 8340 9.0 8.3 108 -M 8.8 * Pocket Creek 9360 -M -M * 6.6 -M * Snider Basin 8060 11.8 9.9 119 12.1 11.7 103 Spring Creek Divide 9000 21.7 18.8 115 20.6 19.5 106 Triple Peak 8500 22.2 17.1 130 22.2 20.5 108 ----- ----- Basin Index (%) 107 90 LOWER GREEN RIVER Blacks Fork Jct 8869 6.5 -M * 9.9 -M * Buck Pasture 9632 15.0 -M * 14.6 -M * EF Blacks Fork GS 9360 12.3 -M * -M -M * Hams Fork 7840 11.1 9.4 118 9.6 9.2 104 Hewinta 9500 9.1 8.0 114 12.1 11.0 110 Hickerson Park 9122 8.9 6.0 148 9.3 7.6 122 Hole-in-Rock 9168 9.0 5.7 158 8.9 7.2 124 Indian Creek 9425 19.1 19.1 100 13.6 18.0 76 Kelley R.S. 8180 13.0 12.2 107 13.8 14.7 94 Spirit Lk 10235 13.6 -M * 14.5 -M * Steel Creek Park 10158 14.2 11.7 121 15.0 12.6 119 ----- ----- Basin Index (%) 117 102 UPPER BEAR RIVER Bear River RS 8777 7.8 -M * 8.9 -M * Bug Lake 7987 16.3 15.0 109 15.1 15.6 97 Burts Miller Ranch 8000 5.6 -M * 5.8 -M * Chalk Creek #1 9171 16.4 18.6 88 15.3 19.8 77 Hayden Fork 9130 13.8 12.3 112 16.8 16.6 101 Kelley R.S. 8180 13.0 12.2 107 13.8 14.7 94 Lily Lake 9133 9.9 10.5 94 10.0 13.4 75 Monte Cristo 8932 23.0 21.5 107 20.4 20.8 98 Salt River Summit 7640 12.7 10.7 119 12.9 13.6 95 Spring Creek Divide 9000 21.7 18.8 115 20.6 19.5 106 ----- ----- Basin Index (%) 106 93 ----------------------------------------------------------------------------- -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.