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 WEDNESDAY: MARCH 4 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 13.6 13.6 100 14.1 17.5 81 Black Bear 8170 26.7 30.1 89 25.0 31.6 79 Blind Bull Sum 8650 21.0 18.3 115 12.4 16.3 76 Cottonwood Creek 7670 22.9 17.4 132 24.1 19.9 121 East Rim Divide 7930 10.5 8.5 124 8.2 9.7 85 Grand Targhee 9260 34.2 30.6 112 24.2 25.2 96 Granite Creek 6770 13.8 14.0 99 -M 16.8 * Grassy Lake 7265 26.3 26.6 99 26.3 30.0 88 Gros Ventre Summit 8750 9.4 10.1 93 9.3 10.3 90 Gunsight Pass 9820 10.6 10.8 98 10.6 11.0 96 Lewis Lake Divide 7850 20.2 25.4 80 23.6 29.4 80 Phillips Bench 8200 23.5 20.0 118 22.8 23.2 98 Salt River Summit 7640 12.7 10.7 119 12.9 13.7 94 Snake River Station 6920 14.1 14.4 98 16.5 18.9 87 Spring Creek Divide 9000 21.8 19.0 115 20.8 19.6 106 Thumb Divide 7980 11.6 12.4 94 11.6 15.0 77 Togwotee Pass 9580 22.6 18.3 123 21.7 19.8 110 Two Ocean Plateau 9240 23.6 21.8 108 19.1 22.1 86 Willow Creek 8080 29.2 22.9 128 28.7 27.3 105 Younts Peak 8350 14.8 11.8 125 11.8 12.9 91 ----- ----- Basin Index (%) 107 92 MADISON-GALLATIN Black Bear 8170 26.7 30.1 89 25.0 31.6 79 Canyon 7870 11.2 10.8 104 11.4 13.3 86 Madison Plateau 7750 16.6 18.1 92 14.4 21.7 66 West Yellowstone 6700 8.9 9.1 98 7.5 11.9 63 Whiskey Creek 6800 11.9 12.2 98 13.6 16.6 82 ----- ----- Basin Index (%) 94 76 YELLOWSTONE Beartooth Lake 9360 18.5 17.3 107 17.1 16.0 107 Burnt Mtn 5880 5.5 4.1 134 10.9 9.7 112 Canyon 7870 11.2 10.8 104 11.4 13.3 86 Cole Creek 7850 14.2 10.4 137 10.8 9.3 116 Evening Star 9200 22.6 19.6 115 24.7 22.5 110 Fisher Creek 9100 25.6 26.1 98 26.4 26.0 102 Northeast Entrance 7350 9.0 8.4 107 10.1 10.0 101 Parker Peak 9400 21.2 16.2 131 19.4 14.3 136 Sylvan Lake 8420 16.9 16.1 105 18.7 18.3 102 Thumb Divide 7980 11.6 12.4 94 11.6 15.0 77 Two Ocean Plateau 9240 23.6 21.8 108 19.1 22.1 86 White Mill 8700 20.9 18.6 112 17.2 19.3 89 Wolverine 7650 11.6 8.6 135 11.1 10.1 110 Younts Peak 8350 14.8 11.8 125 11.8 12.9 91 ----- ----- Basin Index (%) 112 101 WIND RIVER Burroughs Creek 8750 10.2 -M * 11.7 -M * Castle Creek 8400 4.6 -M * 5.2 -M * Cold Springs 9630 6.4 5.6 114 6.1 7.6 80 Deer Park 9700 10.3 10.9 94 9.1 15.5 59 Hobbs Park 10100 10.9 10.0 109 9.3 9.7 96 Kirwin 9550 9.3 7.2 129 8.1 8.9 91 Little Warm 9370 9.5 8.2 116 7.7 10.0 77 Owl Creek 8975 5.5 4.0 138 5.8 4.4 132 South Pass 9040 9.2 11.8 78 8.1 13.7 59 St. Lawrence Alt 8620 4.5 5.4 83 5.9 6.6 89 Togwotee Pass 9580 22.6 18.3 123 21.7 19.8 110 Townsend Creek 8700 7.8 6.8 115 7.8 8.8 89 ----- ----- Basin Index (%) 109 85 BIGHORN BASIN Bald Mtn. 9380 18.6 15.2 122 14.2 13.3 107 Bear Trap Meadow 8200 8.3 4.5 184 8.3 6.3 132 Bone Springs Div 9350 14.9 12.5 119 12.2 12.0 102 Grave Springs 8550 9.2 7.1 130 9.6 8.0 120 Kirwin 9550 9.3 7.2 129 8.1 8.9 91 Marquette 8760 6.0 -M * 7.5 -M * Middle Powder 7760 11.3 8.3 136 11.0 8.9 124 Owl Creek 8975 5.5 4.0 138 5.8 4.4 132 Powder River Pass 9480 11.1 8.1 137 11.0 9.8 112 Shell Creek 9580 12.6 11.9 106 12.1 10.8 112 Timber Creek 7950 5.2 3.9 133 5.9 5.4 109 ----- ----- Basin Index (%) 128 112 SHOSHONE RIVER Blackwater 9780 18.0 17.7 102 18.2 16.4 111 Evening Star 9200 22.6 19.6 115 24.7 22.5 110 Marquette 8760 6.0 -M * 7.5 -M * Sylvan Lake 8420 16.9 16.1 105 18.7 18.3 102 Sylvan Road 7120 10.4 9.7 107 -M 14.1 * Younts Peak 8350 14.8 11.8 125 11.8 12.9 91 ----- ----- Basin Index (%) 110 105 POWDER RIVER Bear Trap Meadow 8200 8.3 4.5 184 8.3 6.3 132 Cloud Peak Reservoir 9860 11.8 10.6 111 11.2 9.8 114 Grave Springs 8550 9.2 7.1 130 9.6 8.0 120 Hansen Sawmill 8360 6.2 4.7 132 7.3 6.2 118 Middle Powder 7760 11.3 8.3 136 11.0 8.9 124 Powder River Pass 9480 11.1 8.1 137 11.0 9.8 112 Soldier Park 8720 5.1 -M * 7.3 -M * ----- ----- Basin Index (%) 134 119 TONGUE RIVER Big Goose 7990 7.6 6.3 121 8.3 8.0 104 Bone Springs Div 9350 14.9 12.5 119 12.2 12.0 102 Burgess Junction 7880 9.8 8.6 114 10.9 9.2 118 Dome Lake 8880 11.3 8.8 128 8.1 10.1 80 Little Goose 8870 9.1 -M * 7.1 -M * Sucker Creek 8880 11.9 9.2 129 11.0 10.8 102 Tie Creek 6870 7.7 4.4 175 11.4 8.6 133 ----- ----- Basin Index (%) 127 105 BELLE FOURCHE Blind Park 6890 7.7 6.4 120 7.6 9.6 79 Cole Canyon 5910 -M 4.9 * -M 7.2 * ----- ----- Basin Index (%) 120 79 CHEYENNE RIVER BASIN Blind Park 6890 7.7 6.4 120 7.6 9.6 79 North Rapid Creek 6130 7.1 6.0 118 7.5 7.7 97 ----- ----- Basin Index (%) 119 87 UPPER N. PLATTE Arapaho Ridge 10960 19.1 17.0 112 18.4 18.0 102 Blackhall Mtn 9820 25.1 -M * 24.5 -M * Columbine 9160 27.6 20.2 137 25.6 20.6 124 Divide Peak 8880 18.0 16.3 110 18.7 17.0 110 Joe Wright 10120 18.3 17.1 107 22.8 20.2 113 Laprele Creek 8375 11.1 7.8 142 11.3 9.5 119 Med Bow 10500 37.9 -M * 30.6 -M * Never Summer 10280 16.7 16.3 102 12.2 -M * North French Creek 10130 29.4 21.3 138 28.4 21.3 133 Old Battle 10000 26.3 24.3 108 24.2 28.3 86 Rawah 9020 11.2 8.9 126 12.7 11.1 114 Sage Creek Basin 7850 13.7 10.7 128 10.8 11.9 91 Sand Lake 10050 25.2 21.4 118 23.2 19.1 121 South Brush Creek 8440 11.7 10.6 110 11.6 11.9 97 Tower 10500 39.4 36.9 107 35.6 32.4 110 Webber Springs 9250 18.6 19.0 98 20.1 21.4 94 Whiskey Park 8950 29.6 22.0 135 27.9 22.7 123 Willow Creek Pass 9540 11.1 9.7 114 10.5 10.5 100 Zirkel 9340 24.8 23.6 105 -M 23.6 * ----- ----- Basin Index (%) 116 109 SWEETWATER Deer Park 9700 10.3 10.9 94 9.1 15.5 59 Larsen Creek 9000 4.7 9.8 48 6.4 -M * South Pass 9040 9.2 11.8 78 8.1 13.7 59 ----- ----- Basin Index (%) 74 59 LOWER N. PLATTE Casper Mtn. 7900 14.2 10.6 134 9.5 11.3 84 Laprele Creek 8375 11.1 7.8 142 11.3 9.5 119 Reno Hill 8400 14.8 10.5 141 15.0 11.3 133 Windy Peak 7900 8.8 5.9 149 7.4 7.9 94 ----- ----- Basin Index (%) 141 108 LARAMIE RIVER Brooklyn Lake 10240 23.6 15.5 152 22.8 16.3 140 Cinnabar Park 9574 21.1 17.4 121 23.0 19.8 116 Crow Creek 8330 6.9 6.8 101 9.3 7.9 118 Deadman Hill 10220 15.5 12.6 123 13.6 13.0 105 Rawah 9020 11.2 8.9 126 12.7 11.1 114 Roach 9700 12.4 12.6 98 12.4 14.9 83 Windy Peak 7900 8.8 5.9 149 7.4 7.9 94 ----- ----- Basin Index (%) 125 111 S. PLATTE Black Mountain 8920 9.0 -M * 11.0 -M * Crow Creek 8330 6.9 6.8 101 9.3 7.9 118 Deadman Hill 10220 15.5 12.6 123 13.6 13.0 105 ----- ----- Basin Index (%) 115 110 LITTLE SNAKE RIVER Battle Mountain 7440 12.5 10.0 125 12.7 12.3 103 Divide Peak 8880 18.0 16.3 110 18.7 17.0 110 Elk River 8700 18.4 16.0 115 15.5 16.2 96 Little Snake River 8915 24.2 19.9 122 28.5 25.2 113 Old Battle 10000 26.3 24.3 108 24.2 28.3 86 Sage Creek Basin 7850 13.7 10.7 128 10.8 11.9 91 Sandstone RS 8150 14.8 10.9 136 13.7 15.3 90 Whiskey Park 8950 29.6 22.0 135 27.9 22.7 123 ----- ----- Basin Index (%) 121 102 UPPER GREEN RIVER Big Sandy Opening 9080 7.8 10.3 76 6.7 10.7 63 Blind Bull Sum 8650 21.0 18.3 115 12.4 16.3 76 East Rim Divide 7930 10.5 8.5 124 8.2 9.7 85 Elkhart Park G.S. 9400 9.0 9.6 94 8.5 10.7 79 Gros Ventre Summit 8750 9.4 10.1 93 9.3 10.3 90 Gunsight Pass 9820 10.6 10.8 98 10.6 11.0 96 Indian Creek 9425 19.1 19.2 99 13.6 18.2 75 Kendall R.S. 7740 8.8 9.9 89 8.8 11.9 74 Loomis Park 8240 12.4 12.0 103 15.0 14.3 105 New Fork Lake 8340 9.0 8.4 107 -M 8.9 * Pocket Creek 9360 -M -M * 6.5 -M * Snider Basin 8060 11.8 10.0 118 12.3 11.7 105 Spring Creek Divide 9000 21.8 19.0 115 20.8 19.6 106 Triple Peak 8500 22.3 17.4 128 22.4 20.6 109 ----- ----- Basin Index (%) 106 90 LOWER GREEN RIVER Blacks Fork Jct 8869 6.5 -M * 9.9 -M * Buck Pasture 9632 15.1 -M * 14.6 -M * EF Blacks Fork GS 9360 12.3 -M * 8.0 -M * Hams Fork 7840 11.0 9.5 116 9.6 9.3 103 Hewinta 9500 9.2 8.1 114 11.8 11.0 107 Hickerson Park 9122 9.0 6.1 148 9.3 7.7 121 Hole-in-Rock 9168 8.9 5.7 156 8.8 7.2 122 Indian Creek 9425 19.1 19.2 99 13.6 18.2 75 Kelley R.S. 8180 13.1 12.2 107 13.9 14.8 94 Spirit Lk 10235 13.6 -M * 14.4 -M * Steel Creek Park 10158 14.2 11.8 120 15.0 12.6 119 ----- ----- Basin Index (%) 116 101 UPPER BEAR RIVER Bear River RS 8777 7.9 -M * 8.9 -M * Bug Lake 7987 16.3 15.2 107 15.1 15.8 96 Burts Miller Ranch 8000 5.7 -M * 5.8 -M * Chalk Creek #1 9171 16.5 18.7 88 15.4 19.9 77 Hayden Fork 9130 13.9 12.4 112 16.9 16.7 101 Kelley R.S. 8180 13.1 12.2 107 13.9 14.8 94 Lily Lake 9133 9.9 10.6 93 10.0 13.5 74 Monte Cristo 8932 23.0 21.7 106 20.4 20.9 98 Salt River Summit 7640 12.7 10.7 119 12.9 13.7 94 Spring Creek Divide 9000 21.8 19.0 115 20.8 19.6 106 ----- ----- 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.