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 THURSDAY: MARCH 12 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 14.1 13.8 102 14.6 18.3 80 Black Bear 8170 28.5 31.6 90 26.6 33.3 80 Blind Bull Sum 8650 22.2 19.6 113 13.2 17.0 78 Cottonwood Creek 7670 23.9 18.6 128 25.5 20.9 122 East Rim Divide 7930 10.8 9.5 114 8.6 10.2 84 Grand Targhee 9260 34.3 32.1 107 24.6 25.7 96 Granite Creek 6770 14.6 14.7 99 13.8 17.6 78 Grassy Lake 7265 27.5 27.7 99 27.3 31.4 87 Gros Ventre Summit 8750 9.9 10.9 91 9.7 11.0 88 Gunsight Pass 9820 11.0 11.6 95 11.0 11.7 94 Lewis Lake Divide 7850 21.1 26.7 79 24.5 30.9 79 Phillips Bench 8200 24.2 21.4 113 23.4 24.3 96 Salt River Summit 7640 13.3 11.3 118 13.5 14.3 94 Snake River Station 6920 14.3 15.2 94 17.0 19.7 86 Spring Creek Divide 9000 22.5 19.7 114 21.5 20.5 105 Thumb Divide 7980 12.6 13.3 95 12.3 15.8 78 Togwotee Pass 9580 23.2 19.6 118 22.3 20.8 107 Two Ocean Plateau 9240 24.8 23.2 107 20.2 23.4 86 Willow Creek 8080 31.7 24.2 131 30.4 28.7 106 Younts Peak 8350 15.2 12.4 123 12.1 13.5 90 ----- ----- Basin Index (%) 106 91 MADISON-GALLATIN Black Bear 8170 28.5 31.6 90 26.6 33.3 80 Canyon 7870 12.0 11.5 104 12.0 14.0 86 Madison Plateau 7750 17.7 19.4 91 15.5 22.9 68 West Yellowstone 6700 9.4 9.8 96 7.8 12.4 63 Whiskey Creek 6800 12.8 13.3 96 14.6 17.5 83 ----- ----- Basin Index (%) 94 76 YELLOWSTONE Beartooth Lake 9360 19.5 18.4 106 18.0 16.9 107 Burnt Mtn 5880 6.4 4.3 149 11.4 10.2 112 Canyon 7870 12.0 11.5 104 12.0 14.0 86 Cole Creek 7850 15.4 11.3 136 11.5 10.0 115 Evening Star 9200 23.7 21.1 112 25.7 23.5 109 Fisher Creek 9100 27.1 27.2 100 27.8 27.4 101 Northeast Entrance 7350 9.2 8.7 106 10.5 10.5 100 Parker Peak 9400 22.2 16.8 132 20.3 15.0 135 Sylvan Lake 8420 17.8 17.1 104 19.5 19.1 102 Thumb Divide 7980 12.6 13.3 95 12.3 15.8 78 Two Ocean Plateau 9240 24.8 23.2 107 20.2 23.4 86 White Mill 8700 21.8 19.3 113 18.0 20.3 89 Wolverine 7650 11.6 9.0 129 11.5 10.5 110 Younts Peak 8350 15.2 12.4 123 12.1 13.5 90 ----- ----- Basin Index (%) 112 100 WIND RIVER Burroughs Creek 8750 10.5 -M * 12.0 -M * Castle Creek 8400 4.6 -M * 5.5 -M * Cold Springs 9630 6.4 6.0 107 6.1 8.1 75 Deer Park 9700 10.6 12.2 87 9.5 16.3 58 Hobbs Park 10100 11.1 11.0 101 9.3 10.4 89 Kirwin 9550 9.6 7.9 122 8.4 9.4 89 Little Warm 9370 9.7 8.8 110 7.9 10.6 75 Owl Creek 8975 5.4 4.4 123 5.8 4.6 126 South Pass 9040 9.6 12.6 76 8.5 14.6 58 St. Lawrence Alt 8620 4.5 5.9 76 6.1 7.1 86 Togwotee Pass 9580 23.2 19.6 118 22.3 20.8 107 Townsend Creek 8700 7.9 7.4 107 8.1 9.4 86 ----- ----- Basin Index (%) 102 83 BIGHORN BASIN Bald Mtn. 9380 19.1 16.0 119 14.9 14.0 106 Bear Trap Meadow 8200 8.3 4.7 177 8.5 6.6 129 Bone Springs Div 9350 15.5 13.3 117 12.6 12.6 100 Grave Springs 8550 9.2 7.5 123 9.7 8.4 115 Kirwin 9550 9.6 7.9 122 8.4 9.4 89 Marquette 8760 5.9 -M * 7.6 -M * Middle Powder 7760 11.2 8.9 126 11.0 9.4 117 Owl Creek 8975 5.4 4.4 123 5.8 4.6 126 Powder River Pass 9480 11.2 8.6 130 11.4 10.2 112 Shell Creek 9580 13.4 12.3 109 12.8 11.2 114 Timber Creek 7950 5.0 4.1 122 6.0 5.6 107 ----- ----- Basin Index (%) 123 110 SHOSHONE RIVER Blackwater 9780 18.9 19.2 98 19.2 17.3 111 Evening Star 9200 23.7 21.1 112 25.7 23.5 109 Marquette 8760 5.9 -M * 7.6 -M * Sylvan Lake 8420 17.8 17.1 104 19.5 19.1 102 Sylvan Road 7120 10.5 10.0 105 -M 14.6 * Younts Peak 8350 15.2 12.4 123 12.1 13.5 90 ----- ----- Basin Index (%) 108 104 POWDER RIVER Bear Trap Meadow 8200 8.3 4.7 177 8.5 6.6 129 Cloud Peak Reservoir 9860 12.8 11.9 108 11.8 10.4 113 Grave Springs 8550 9.2 7.5 123 9.7 8.4 115 Hansen Sawmill 8360 6.4 5.2 123 7.5 6.6 114 Middle Powder 7760 11.2 8.9 126 11.0 9.4 117 Powder River Pass 9480 11.2 8.6 130 11.4 10.2 112 Soldier Park 8720 6.1 -M * 7.8 -M * ----- ----- Basin Index (%) 126 116 TONGUE RIVER Big Goose 7990 8.2 7.0 117 8.9 8.5 105 Bone Springs Div 9350 15.5 13.3 117 12.6 12.6 100 Burgess Junction 7880 10.2 9.3 110 11.3 9.8 115 Dome Lake 8880 12.4 9.4 132 8.4 10.7 79 Little Goose 8870 9.8 -M * 7.6 -M * Sucker Creek 8880 12.4 10.2 122 11.6 11.4 102 Tie Creek 6870 7.7 4.7 164 11.8 9.0 131 ----- ----- Basin Index (%) 123 104 BELLE FOURCHE Blind Park 6890 7.1 6.9 103 7.7 10.1 76 Cole Canyon 5910 -M 5.1 * -M 7.4 * ----- ----- Basin Index (%) 103 76 CHEYENNE RIVER BASIN Blind Park 6890 7.1 6.9 103 7.7 10.1 76 North Rapid Creek 6130 7.2 6.3 114 7.4 8.1 91 ----- ----- Basin Index (%) 108 83 UPPER N. PLATTE Arapaho Ridge 10960 20.3 17.8 114 19.5 18.9 103 Blackhall Mtn 9820 26.4 -M * 25.6 -M * Columbine 9160 30.1 21.2 142 26.5 21.9 121 Divide Peak 8880 18.6 17.0 109 19.1 18.1 106 Joe Wright 10120 19.3 18.5 104 23.7 21.6 110 Laprele Creek 8375 11.1 8.6 129 11.4 10.2 112 Med Bow 10500 39.4 -M * 31.9 -M * Never Summer 10280 17.5 17.1 102 13.0 -M * North French Creek 10130 30.5 23.3 131 28.7 22.6 127 Old Battle 10000 27.5 25.7 107 25.1 30.0 84 Rawah 9020 11.4 9.3 123 13.0 11.6 112 Sage Creek Basin 7850 14.5 11.7 124 11.0 12.5 88 Sand Lake 10050 26.1 22.8 114 23.9 20.5 117 South Brush Creek 8440 12.2 11.2 109 11.8 12.6 94 Tower 10500 41.5 38.4 108 37.5 34.1 110 Webber Springs 9250 19.4 20.2 96 21.3 22.8 93 Whiskey Park 8950 30.7 23.5 131 28.7 24.0 120 Willow Creek Pass 9540 11.6 10.3 113 11.0 11.1 99 Zirkel 9340 26.6 25.3 105 27.9 24.7 113 ----- ----- Basin Index (%) 115 107 SWEETWATER Deer Park 9700 10.6 12.2 87 9.5 16.3 58 Larsen Creek 9000 4.9 10.5 47 6.6 -M * South Pass 9040 9.6 12.6 76 8.5 14.6 58 ----- ----- Basin Index (%) 71 58 LOWER N. PLATTE Casper Mtn. 7900 14.1 11.6 122 9.5 12.1 79 Laprele Creek 8375 11.1 8.6 129 11.4 10.2 112 Reno Hill 8400 14.9 11.3 132 15.2 12.2 125 Windy Peak 7900 8.8 6.6 133 7.8 8.6 91 ----- ----- Basin Index (%) 128 102 LARAMIE RIVER Brooklyn Lake 10240 24.5 17.0 144 23.4 17.5 134 Cinnabar Park 9574 21.7 17.8 122 23.3 20.7 113 Crow Creek 8330 6.9 7.1 97 -M 8.5 * Deadman Hill 10220 16.2 13.1 124 14.2 14.1 101 Rawah 9020 11.4 9.3 123 13.0 11.6 112 Roach 9700 13.1 13.5 97 13.1 16.0 82 Windy Peak 7900 8.8 6.6 133 7.8 8.6 91 ----- ----- Basin Index (%) 122 107 S. PLATTE Black Mountain 8920 9.0 -M * 11.2 -M * Crow Creek 8330 6.9 7.1 97 -M 8.5 * Deadman Hill 10220 16.2 13.1 124 14.2 14.1 101 ----- ----- Basin Index (%) 114 101* LITTLE SNAKE RIVER Battle Mountain 7440 12.6 10.7 118 13.0 13.0 100 Divide Peak 8880 18.6 17.0 109 19.1 18.1 106 Elk River 8700 18.8 17.0 111 15.8 17.2 92 Little Snake River 8915 25.0 20.3 123 29.5 26.0 113 Old Battle 10000 27.5 25.7 107 25.1 30.0 84 Sage Creek Basin 7850 14.5 11.7 124 11.0 12.5 88 Sandstone RS 8150 15.0 11.8 127 14.1 16.0 88 Whiskey Park 8950 30.7 23.5 131 28.7 24.0 120 ----- ----- Basin Index (%) 118 100 UPPER GREEN RIVER Big Sandy Opening 9080 8.0 10.8 74 6.8 11.3 60 Blind Bull Sum 8650 22.2 19.6 113 13.2 17.0 78 East Rim Divide 7930 10.8 9.5 114 8.6 10.2 84 Elkhart Park G.S. 9400 9.5 10.2 93 9.1 11.3 81 Gros Ventre Summit 8750 9.9 10.9 91 9.7 11.0 88 Gunsight Pass 9820 11.0 11.6 95 11.0 11.7 94 Indian Creek 9425 19.8 20.4 97 13.9 19.1 73 Kendall R.S. 7740 9.2 10.6 87 9.3 12.5 74 Loomis Park 8240 12.8 12.8 100 15.7 15.0 105 New Fork Lake 8340 9.5 9.1 104 -M 9.4 * Pocket Creek 9360 -M -M * 6.7 -M * Snider Basin 8060 12.3 10.7 115 12.6 12.2 103 Spring Creek Divide 9000 22.5 19.7 114 21.5 20.5 105 Triple Peak 8500 23.5 18.7 126 23.6 21.6 109 ----- ----- Basin Index (%) 104 89 LOWER GREEN RIVER Blacks Fork Jct 8869 7.1 -M * 10.4 -M * Buck Pasture 9632 15.5 -M * 14.9 -M * EF Blacks Fork GS 9360 12.6 -M * 8.3 -M * Hams Fork 7840 11.4 10.0 114 9.8 9.7 101 Hewinta 9500 9.7 8.7 111 12.6 11.6 109 Hickerson Park 9122 9.5 6.5 146 9.6 8.2 117 Hole-in-Rock 9168 9.5 6.2 153 9.4 7.7 122 Indian Creek 9425 19.8 20.4 97 13.9 19.1 73 Kelley R.S. 8180 13.6 12.8 106 14.2 15.5 92 Spirit Lk 10235 14.5 -M * 15.4 -M * Steel Creek Park 10158 14.6 12.7 115 15.4 13.4 115 ----- ----- Basin Index (%) 114 100 UPPER BEAR RIVER Bear River RS 8777 8.3 -M * 9.5 -M * Bug Lake 7987 16.6 16.3 102 15.4 16.6 93 Burts Miller Ranch 8000 5.8 -M * 6.2 -M * Chalk Creek #1 9171 17.7 20.2 88 16.2 21.0 77 Hayden Fork 9130 14.2 13.6 104 17.6 17.6 100 Kelley R.S. 8180 13.6 12.8 106 14.2 15.5 92 Lily Lake 9133 10.5 11.2 94 10.6 14.3 74 Monte Cristo 8932 24.4 23.0 106 21.2 22.0 96 Salt River Summit 7640 13.3 11.3 118 13.5 14.3 94 Spring Creek Divide 9000 22.5 19.7 114 21.5 20.5 105 ----- ----- Basin Index (%) 104 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.