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 19 , 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 14.7 105 15.9 18.9 84 Black Bear 8170 30.5 32.4 94 28.4 34.3 83 Blind Bull Sum 8650 22.8 20.4 112 13.6 17.6 77 Cottonwood Creek 7670 23.9 19.7 121 26.0 21.8 119 East Rim Divide 7930 11.1 9.5 117 8.6 10.5 82 Grand Targhee 9260 37.4 32.9 114 26.5 26.9 99 Granite Creek 6770 16.0 15.0 107 -M 18.1 * Grassy Lake 7265 29.8 29.3 102 29.5 32.5 91 Gros Ventre Summit 8750 11.1 11.6 96 10.7 11.4 94 Gunsight Pass 9820 11.7 12.0 98 11.6 12.0 97 Lewis Lake Divide 7850 23.3 27.6 84 26.5 31.9 83 Phillips Bench 8200 26.8 22.3 120 26.1 25.2 104 Salt River Summit 7640 13.6 12.0 113 13.7 14.9 92 Snake River Station 6920 16.0 15.1 106 18.6 20.3 92 Spring Creek Divide 9000 23.0 20.9 110 21.8 21.3 102 Thumb Divide 7980 14.4 14.0 103 14.1 16.4 86 Togwotee Pass 9580 25.2 20.5 123 24.2 21.7 112 Two Ocean Plateau 9240 26.8 23.9 112 21.8 24.2 90 Willow Creek 8080 32.5 25.4 128 30.9 29.8 104 Younts Peak 8350 16.0 13.4 119 12.5 14.0 89 ----- ----- Basin Index (%) 109 94 MADISON-GALLATIN Black Bear 8170 30.5 32.4 94 28.4 34.3 83 Canyon 7870 13.4 11.7 115 13.6 14.5 94 Madison Plateau 7750 19.4 20.0 97 17.1 23.5 73 West Yellowstone 6700 10.6 9.9 107 8.5 12.7 67 Whiskey Creek 6800 14.1 14.1 100 15.9 18.0 88 ----- ----- Basin Index (%) 100 81 YELLOWSTONE Beartooth Lake 9360 20.3 19.1 106 18.8 17.6 107 Burnt Mtn 5880 -M 4.5 * 12.0 10.8 111 Canyon 7870 13.4 11.7 115 13.6 14.5 94 Cole Creek 7850 15.3 11.9 129 12.1 10.6 114 Evening Star 9200 24.8 22.0 113 26.9 24.3 111 Fisher Creek 9100 29.1 28.2 103 29.7 28.4 105 Northeast Entrance 7350 10.3 9.0 114 11.6 10.9 106 Parker Peak 9400 23.4 17.5 134 21.4 15.6 137 Sylvan Lake 8420 19.2 18.0 107 20.9 19.8 106 Thumb Divide 7980 14.4 14.0 103 14.1 16.4 86 Two Ocean Plateau 9240 26.8 23.9 112 21.8 24.2 90 White Mill 8700 23.8 19.7 121 19.8 21.1 94 Wolverine 7650 12.0 8.9 135 11.9 10.9 109 Younts Peak 8350 16.0 13.4 119 12.5 14.0 89 ----- ----- Basin Index (%) 114 103 WIND RIVER Burroughs Creek 8750 11.5 -M * 12.5 -M * Castle Creek 8400 5.0 -M * 5.6 -M * Cold Springs 9630 6.8 6.3 108 6.1 8.5 72 Deer Park 9700 11.1 13.1 85 9.7 17.0 57 Hobbs Park 10100 11.6 11.6 100 9.7 11.0 88 Kirwin 9550 10.2 8.4 121 8.9 9.9 90 Little Warm 9370 10.4 9.2 113 8.0 11.1 72 Owl Creek 8975 6.0 4.6 130 6.2 4.9 127 South Pass 9040 9.8 13.6 72 8.4 15.2 55 St. Lawrence Alt 8620 4.6 6.1 75 6.3 7.4 85 Togwotee Pass 9580 25.2 20.5 123 24.2 21.7 112 Townsend Creek 8700 7.9 8.1 98 8.1 10.0 81 ----- ----- Basin Index (%) 102 82 BIGHORN BASIN Bald Mtn. 9380 19.5 16.4 119 15.1 14.7 103 Bear Trap Meadow 8200 8.7 5.0 174 8.7 7.0 124 Bone Springs Div 9350 16.0 14.0 114 13.1 13.3 98 Grave Springs 8550 9.4 8.1 116 9.8 8.9 110 Kirwin 9550 10.2 8.4 121 8.9 9.9 90 Marquette 8760 6.3 -M * 7.9 -M * Middle Powder 7760 11.8 9.6 123 11.3 9.9 114 Owl Creek 8975 6.0 4.6 130 6.2 4.9 127 Powder River Pass 9480 11.7 9.0 130 11.8 10.7 110 Shell Creek 9580 13.8 12.8 108 13.1 11.8 111 Timber Creek 7950 5.4 4.2 129 6.2 6.1 102 ----- ----- Basin Index (%) 122 107 SHOSHONE RIVER Blackwater 9780 19.8 20.6 96 20.2 18.0 112 Evening Star 9200 24.8 22.0 113 26.9 24.3 111 Marquette 8760 6.3 -M * 7.9 -M * Sylvan Lake 8420 19.2 18.0 107 20.9 19.8 106 Sylvan Road 7120 11.3 10.4 109 -M 15.1 * Younts Peak 8350 16.0 13.4 119 12.5 14.0 89 ----- ----- Basin Index (%) 108 106 POWDER RIVER Bear Trap Meadow 8200 8.7 5.0 174 8.7 7.0 124 Cloud Peak Reservoir 9860 13.4 12.8 105 12.3 11.1 111 Grave Springs 8550 9.4 8.1 116 9.8 8.9 110 Hansen Sawmill 8360 6.9 5.6 123 7.8 7.1 110 Middle Powder 7760 11.8 9.6 123 11.3 9.9 114 Powder River Pass 9480 11.7 9.0 130 11.8 10.7 110 Soldier Park 8720 6.3 -M * 7.9 -M * ----- ----- Basin Index (%) 124 113 TONGUE RIVER Big Goose 7990 8.4 7.7 109 9.2 9.2 100 Bone Springs Div 9350 16.0 14.0 114 13.1 13.3 98 Burgess Junction 7880 10.5 9.5 111 11.5 10.4 111 Dome Lake 8880 12.6 10.1 125 8.8 11.4 77 Little Goose 8870 10.1 -M * 7.8 -M * Sucker Creek 8880 12.7 10.8 118 11.9 12.1 98 Tie Creek 6870 7.8 5.0 156 11.9 9.7 123 ----- ----- Basin Index (%) 119 100 BELLE FOURCHE Blind Park 6890 6.5 7.2 90 7.7 10.5 73 Cole Canyon 5910 -M 5.5 * -M 7.8 * ----- ----- Basin Index (%) 90 73 CHEYENNE RIVER BASIN Blind Park 6890 6.5 7.2 90 7.7 10.5 73 North Rapid Creek 6130 7.3 6.5 112 7.6 8.5 89 ----- ----- Basin Index (%) 101 81 UPPER N. PLATTE Arapaho Ridge 10960 20.9 18.0 116 20.1 19.6 103 Blackhall Mtn 9820 27.2 -M * 26.2 -M * Columbine 9160 30.9 21.9 141 26.7 22.7 118 Divide Peak 8880 18.8 17.5 107 19.3 19.0 102 Joe Wright 10120 19.7 19.0 104 24.2 22.7 107 Laprele Creek 8375 11.3 9.1 124 11.6 10.8 107 Med Bow 10500 40.1 -M * 32.1 -M * Never Summer 10280 18.1 17.7 102 13.4 -M * North French Creek 10130 31.0 24.9 124 29.6 23.5 126 Old Battle 10000 28.1 26.2 107 26.1 31.2 84 Rawah 9020 11.5 9.3 124 13.3 12.0 111 Sage Creek Basin 7850 14.1 11.6 122 11.1 12.9 86 Sand Lake 10050 26.6 24.4 109 24.3 21.5 113 South Brush Creek 8440 12.5 11.1 113 12.1 13.2 92 Tower 10500 42.5 39.7 107 38.3 35.5 108 Webber Springs 9250 20.0 21.0 95 21.9 23.7 92 Whiskey Park 8950 31.1 24.2 129 29.1 24.8 117 Willow Creek Pass 9540 12.0 10.8 111 11.3 11.6 97 Zirkel 9340 26.9 25.8 104 28.4 25.3 112 ----- ----- Basin Index (%) 113 105 SWEETWATER Deer Park 9700 11.1 13.1 85 9.7 17.0 57 Larsen Creek 9000 5.1 11.1 46 6.9 -M * South Pass 9040 9.8 13.6 72 8.4 15.2 55 ----- ----- Basin Index (%) 69 56 LOWER N. PLATTE Casper Mtn. 7900 14.6 12.1 121 9.8 12.6 78 Laprele Creek 8375 11.3 9.1 124 11.6 10.8 107 Reno Hill 8400 15.5 11.9 130 15.8 12.8 123 Windy Peak 7900 9.2 7.0 131 8.1 9.0 90 ----- ----- Basin Index (%) 126 100 LARAMIE RIVER Brooklyn Lake 10240 25.0 17.6 142 24.0 18.3 131 Cinnabar Park 9574 21.8 17.9 122 23.5 21.2 111 Crow Creek 8330 7.0 7.0 100 9.7 8.8 110 Deadman Hill 10220 16.6 13.8 120 14.6 14.9 98 Rawah 9020 11.5 9.3 124 13.3 12.0 111 Roach 9700 13.7 13.9 99 14.1 16.8 84 Windy Peak 7900 9.2 7.0 131 8.1 9.0 90 ----- ----- Basin Index (%) 121 106 S. PLATTE Black Mountain 8920 9.3 -M * 11.5 -M * Crow Creek 8330 7.0 7.0 100 9.7 8.8 110 Deadman Hill 10220 16.6 13.8 120 14.6 14.9 98 ----- ----- Basin Index (%) 113 103 LITTLE SNAKE RIVER Battle Mountain 7440 11.9 11.3 105 13.1 13.4 98 Divide Peak 8880 18.8 17.5 107 19.3 19.0 102 Elk River 8700 19.6 17.3 113 16.4 17.9 92 Little Snake River 8915 25.5 21.0 121 29.9 26.3 114 Old Battle 10000 28.1 26.2 107 26.1 31.2 84 Sage Creek Basin 7850 14.1 11.6 122 11.1 12.9 86 Sandstone RS 8150 15.6 12.0 130 14.2 16.6 86 Whiskey Park 8950 31.1 24.2 129 29.1 24.8 117 ----- ----- Basin Index (%) 117 98 UPPER GREEN RIVER Big Sandy Opening 9080 8.3 11.6 72 7.1 11.7 61 Blind Bull Sum 8650 22.8 20.4 112 13.6 17.6 77 East Rim Divide 7930 11.1 9.5 117 8.6 10.5 82 Elkhart Park G.S. 9400 9.5 10.6 90 9.4 11.8 80 Gros Ventre Summit 8750 11.1 11.6 96 10.7 11.4 94 Gunsight Pass 9820 11.7 12.0 98 11.6 12.0 97 Indian Creek 9425 20.2 21.2 95 14.1 20.0 70 Kendall R.S. 7740 9.4 11.2 84 9.4 12.9 73 Loomis Park 8240 13.2 13.3 99 15.9 15.5 103 New Fork Lake 8340 9.9 9.3 106 -M 9.7 * Pocket Creek 9360 -M -M * 6.9 -M * Snider Basin 8060 12.1 11.0 110 12.5 12.7 98 Spring Creek Divide 9000 23.0 20.9 110 21.8 21.3 102 Triple Peak 8500 23.9 19.3 124 23.7 22.6 105 ----- ----- Basin Index (%) 102 88 LOWER GREEN RIVER Blacks Fork Jct 8869 7.4 -M * 10.8 -M * Buck Pasture 9632 16.4 -M * 15.6 -M * EF Blacks Fork GS 9360 13.1 -M * 10.3 -M * Hams Fork 7840 11.1 10.2 109 9.7 10.1 96 Hewinta 9500 10.2 9.8 104 13.1 12.2 107 Hickerson Park 9122 10.5 6.6 159 10.3 8.8 117 Hole-in-Rock 9168 10.2 6.6 155 10.0 8.2 122 Indian Creek 9425 20.2 21.2 95 14.1 20.0 70 Kelley R.S. 8180 13.7 13.3 103 14.2 16.1 88 Spirit Lk 10235 16.0 -M * 16.6 -M * Steel Creek Park 10158 15.3 13.4 114 16.0 14.2 113 ----- ----- Basin Index (%) 112 98 UPPER BEAR RIVER Bear River RS 8777 8.5 -M * 9.8 -M * Bug Lake 7987 16.5 16.6 99 15.7 17.3 91 Burts Miller Ranch 8000 5.2 -M * 6.4 -M * Chalk Creek #1 9171 18.0 21.0 86 16.6 22.0 75 Hayden Fork 9130 14.9 14.2 105 18.3 18.4 99 Kelley R.S. 8180 13.7 13.3 103 14.2 16.1 88 Lily Lake 9133 10.7 11.4 94 11.0 14.9 74 Monte Cristo 8932 24.7 24.2 102 21.6 23.0 94 Salt River Summit 7640 13.6 12.0 113 13.7 14.9 92 Spring Creek Divide 9000 23.0 20.9 110 21.8 21.3 102 ----- ----- Basin Index (%) 101 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.