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 11 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 14.0 13.8 101 14.5 18.3 79 Black Bear 8170 28.4 31.5 90 26.6 33.1 80 Blind Bull Sum 8650 22.0 19.4 113 13.1 16.9 78 Cottonwood Creek 7670 24.0 18.5 130 25.5 20.7 123 East Rim Divide 7930 10.8 9.4 115 8.5 10.2 83 Grand Targhee 9260 34.6 31.9 108 24.6 25.7 96 Granite Creek 6770 14.6 14.6 100 -M 17.5 * Grassy Lake 7265 27.4 27.6 99 27.3 31.2 88 Gros Ventre Summit 8750 9.9 10.9 91 9.5 10.9 87 Gunsight Pass 9820 10.9 11.6 94 10.8 11.6 93 Lewis Lake Divide 7850 21.1 26.5 80 24.4 30.8 79 Phillips Bench 8200 24.1 21.2 114 23.4 24.2 97 Salt River Summit 7640 13.3 11.2 119 13.3 14.2 94 Snake River Station 6920 14.3 15.2 94 17.0 19.6 87 Spring Creek Divide 9000 22.5 19.6 115 21.4 20.4 105 Thumb Divide 7980 12.6 13.2 95 12.3 15.8 78 Togwotee Pass 9580 23.2 19.5 119 22.3 20.7 108 Two Ocean Plateau 9240 24.8 23.1 107 20.2 23.3 87 Willow Creek 8080 31.6 24.1 131 30.4 28.5 107 Younts Peak 8350 15.0 12.4 121 12.0 13.4 90 ----- ----- Basin Index (%) 106 92 MADISON-GALLATIN Black Bear 8170 28.4 31.5 90 26.6 33.1 80 Canyon 7870 11.9 11.5 103 12.0 14.0 86 Madison Plateau 7750 17.7 19.3 92 15.5 22.8 68 West Yellowstone 6700 9.6 9.7 99 7.8 12.4 63 Whiskey Creek 6800 12.7 13.2 96 14.6 17.4 84 ----- ----- Basin Index (%) 94 77 YELLOWSTONE Beartooth Lake 9360 19.3 18.4 105 17.9 16.8 107 Burnt Mtn 5880 5.7 4.3 133 10.8 10.2 106 Canyon 7870 11.9 11.5 103 12.0 14.0 86 Cole Creek 7850 14.6 11.2 130 11.0 9.9 111 Evening Star 9200 23.6 20.9 113 25.6 23.4 109 Fisher Creek 9100 27.0 27.0 100 27.6 27.2 101 Northeast Entrance 7350 9.2 8.6 107 10.4 10.5 99 Parker Peak 9400 22.0 16.7 132 20.1 15.0 134 Sylvan Lake 8420 17.7 17.0 104 19.5 19.0 103 Thumb Divide 7980 12.6 13.2 95 12.3 15.8 78 Two Ocean Plateau 9240 24.8 23.1 107 20.2 23.3 87 White Mill 8700 21.8 19.2 114 18.0 20.3 89 Wolverine 7650 11.6 9.0 129 11.4 10.5 109 Younts Peak 8350 15.0 12.4 121 12.0 13.4 90 ----- ----- Basin Index (%) 111 100 WIND RIVER Burroughs Creek 8750 10.5 -M * 11.8 -M * Castle Creek 8400 4.5 -M * 5.2 -M * Cold Springs 9630 6.4 5.9 108 6.2 8.0 78 Deer Park 9700 10.7 12.1 88 9.4 16.3 58 Hobbs Park 10100 11.1 11.0 101 9.3 10.4 89 Kirwin 9550 9.5 7.8 122 8.3 9.4 88 Little Warm 9370 9.7 8.7 111 7.6 10.5 72 Owl Creek 8975 5.4 4.3 126 5.8 4.6 126 South Pass 9040 9.5 12.5 76 8.3 14.5 57 St. Lawrence Alt 8620 4.5 5.9 76 6.1 7.0 87 Togwotee Pass 9580 23.2 19.5 119 22.3 20.7 108 Townsend Creek 8700 7.8 7.4 105 8.0 9.4 85 ----- ----- Basin Index (%) 103 82 BIGHORN BASIN Bald Mtn. 9380 18.9 16.0 118 14.6 13.9 105 Bear Trap Meadow 8200 8.3 4.7 177 8.4 6.6 127 Bone Springs Div 9350 15.4 13.3 116 12.5 12.6 99 Grave Springs 8550 9.2 7.5 123 9.6 8.3 116 Kirwin 9550 9.5 7.8 122 8.3 9.4 88 Marquette 8760 5.8 -M * 7.5 -M * Middle Powder 7760 11.2 8.8 127 11.0 9.3 118 Owl Creek 8975 5.4 4.3 126 5.8 4.6 126 Powder River Pass 9480 11.2 8.5 132 11.3 10.2 111 Shell Creek 9580 13.2 12.3 107 12.6 11.2 112 Timber Creek 7950 5.1 4.1 124 5.9 5.6 105 ----- ----- Basin Index (%) 123 109 SHOSHONE RIVER Blackwater 9780 18.8 19.1 98 19.0 17.2 110 Evening Star 9200 23.6 20.9 113 25.6 23.4 109 Marquette 8760 5.8 -M * 7.5 -M * Sylvan Lake 8420 17.7 17.0 104 19.5 19.0 103 Sylvan Road 7120 10.4 10.0 104 -M 14.6 * Younts Peak 8350 15.0 12.4 121 12.0 13.4 90 ----- ----- Basin Index (%) 108 104 POWDER RIVER Bear Trap Meadow 8200 8.3 4.7 177 8.4 6.6 127 Cloud Peak Reservoir 9860 12.6 11.8 107 11.7 10.3 114 Grave Springs 8550 9.2 7.5 123 9.6 8.3 116 Hansen Sawmill 8360 6.3 5.2 121 7.4 6.5 114 Middle Powder 7760 11.2 8.8 127 11.0 9.3 118 Powder River Pass 9480 11.2 8.5 132 11.3 10.2 111 Soldier Park 8720 5.9 -M * 7.7 -M * ----- ----- Basin Index (%) 126 116 TONGUE RIVER Big Goose 7990 7.9 6.9 114 8.7 8.4 104 Bone Springs Div 9350 15.4 13.3 116 12.5 12.6 99 Burgess Junction 7880 10.0 9.3 108 11.2 9.7 115 Dome Lake 8880 12.0 9.4 128 8.3 10.6 78 Little Goose 8870 9.4 -M * 7.3 -M * Sucker Creek 8880 12.1 10.1 120 11.4 11.4 100 Tie Creek 6870 7.7 4.7 164 11.6 9.0 129 ----- ----- Basin Index (%) 121 103 BELLE FOURCHE Blind Park 6890 7.4 6.8 109 7.7 10.0 77 Cole Canyon 5910 -M 5.1 * -M 7.4 * ----- ----- Basin Index (%) 109 77 CHEYENNE RIVER BASIN Blind Park 6890 7.4 6.8 109 7.7 10.0 77 North Rapid Creek 6130 7.2 6.3 114 7.4 8.1 91 ----- ----- Basin Index (%) 111 83 UPPER N. PLATTE Arapaho Ridge 10960 19.9 17.7 112 19.2 18.8 102 Blackhall Mtn 9820 26.1 -M * 25.3 -M * Columbine 9160 29.3 21.1 139 26.1 21.8 120 Divide Peak 8880 18.5 17.0 109 19.1 18.0 106 Joe Wright 10120 19.0 18.4 103 23.4 21.4 109 Laprele Creek 8375 11.1 8.5 131 11.4 10.1 113 Med Bow 10500 39.1 -M * 30.9 -M * Never Summer 10280 17.2 17.0 101 12.8 -M * North French Creek 10130 30.3 23.0 132 28.7 22.5 128 Old Battle 10000 27.2 25.6 106 25.1 29.8 84 Rawah 9020 11.2 9.3 120 12.9 11.5 112 Sage Creek Basin 7850 14.5 11.6 125 10.9 12.4 88 Sand Lake 10050 25.9 22.6 115 23.8 20.4 117 South Brush Creek 8440 12.1 11.1 109 11.8 12.6 94 Tower 10500 40.8 38.2 107 36.9 33.9 109 Webber Springs 9250 19.3 20.2 96 21.1 22.6 93 Whiskey Park 8950 30.4 23.3 130 28.5 23.9 119 Willow Creek Pass 9540 11.4 10.3 111 10.9 11.0 99 Zirkel 9340 26.3 25.2 104 27.5 24.6 112 ----- ----- Basin Index (%) 114 107 SWEETWATER Deer Park 9700 10.7 12.1 88 9.4 16.3 58 Larsen Creek 9000 -M 10.4 * 6.6 -M * South Pass 9040 9.5 12.5 76 8.3 14.5 57 ----- ----- Basin Index (%) 82 57 LOWER N. PLATTE Casper Mtn. 7900 14.2 11.5 123 9.5 11.9 80 Laprele Creek 8375 11.1 8.5 131 11.4 10.1 113 Reno Hill 8400 14.8 11.2 132 15.2 12.0 127 Windy Peak 7900 8.9 6.6 135 7.7 8.5 91 ----- ----- Basin Index (%) 130 103 LARAMIE RIVER Brooklyn Lake 10240 24.4 16.8 145 23.3 17.4 134 Cinnabar Park 9574 21.5 17.8 121 23.3 20.6 113 Crow Creek 8330 6.9 7.1 97 10.0 8.4 119 Deadman Hill 10220 15.8 13.0 122 13.9 14.0 99 Rawah 9020 11.2 9.3 120 12.9 11.5 112 Roach 9700 12.6 13.4 94 12.9 15.9 81 Windy Peak 7900 8.9 6.6 135 7.7 8.5 91 ----- ----- Basin Index (%) 121 108 S. PLATTE Black Mountain 8920 8.9 -M * 11.1 -M * Crow Creek 8330 6.9 7.1 97 10.0 8.4 119 Deadman Hill 10220 15.8 13.0 122 13.9 14.0 99 ----- ----- Basin Index (%) 113 107 LITTLE SNAKE RIVER Battle Mountain 7440 12.6 10.6 119 12.9 12.9 100 Divide Peak 8880 18.5 17.0 109 19.1 18.0 106 Elk River 8700 18.8 16.9 111 15.8 17.1 92 Little Snake River 8915 24.8 20.3 122 29.2 25.8 113 Old Battle 10000 27.2 25.6 106 25.1 29.8 84 Sage Creek Basin 7850 14.5 11.6 125 10.9 12.4 88 Sandstone RS 8150 15.1 11.8 128 14.0 16.0 88 Whiskey Park 8950 30.4 23.3 130 28.5 23.9 119 ----- ----- Basin Index (%) 118 100 UPPER GREEN RIVER Big Sandy Opening 9080 7.9 10.8 73 6.8 11.2 61 Blind Bull Sum 8650 22.0 19.4 113 13.1 16.9 78 East Rim Divide 7930 10.8 9.4 115 8.5 10.2 83 Elkhart Park G.S. 9400 9.3 10.1 92 9.1 11.1 82 Gros Ventre Summit 8750 9.9 10.9 91 9.5 10.9 87 Gunsight Pass 9820 10.9 11.6 94 10.8 11.6 93 Indian Creek 9425 19.6 20.3 97 13.9 19.0 73 Kendall R.S. 7740 9.2 10.5 88 9.2 12.5 74 Loomis Park 8240 12.8 12.7 101 15.5 14.9 104 New Fork Lake 8340 9.4 9.0 104 -M 9.3 * Pocket Creek 9360 -M -M * 6.6 -M * Snider Basin 8060 12.2 10.6 115 12.5 12.2 102 Spring Creek Divide 9000 22.5 19.6 115 21.4 20.4 105 Triple Peak 8500 23.4 18.6 126 23.3 21.6 108 ----- ----- Basin Index (%) 104 89 LOWER GREEN RIVER Blacks Fork Jct 8869 7.1 -M * 10.4 -M * Buck Pasture 9632 15.7 -M * 14.9 -M * EF Blacks Fork GS 9360 12.5 -M * 8.2 -M * Hams Fork 7840 11.5 10.0 115 9.7 9.6 101 Hewinta 9500 9.8 8.6 114 12.4 11.5 108 Hickerson Park 9122 9.5 6.4 148 9.6 8.1 119 Hole-in-Rock 9168 9.4 6.1 154 9.2 7.6 121 Indian Creek 9425 19.6 20.3 97 13.9 19.0 73 Kelley R.S. 8180 13.4 12.7 106 14.1 15.4 92 Spirit Lk 10235 14.3 -M * 15.3 -M * Steel Creek Park 10158 14.6 12.6 116 15.4 13.3 116 ----- ----- Basin Index (%) 114 100 UPPER BEAR RIVER Bear River RS 8777 8.3 -M * 9.4 -M * Bug Lake 7987 16.7 16.1 104 15.4 16.4 94 Burts Miller Ranch 8000 6.2 -M * 6.2 -M * Chalk Creek #1 9171 17.6 20.0 88 16.0 20.8 77 Hayden Fork 9130 14.3 13.4 107 17.5 17.4 101 Kelley R.S. 8180 13.4 12.7 106 14.1 15.4 92 Lily Lake 9133 10.5 11.1 95 10.6 14.1 75 Monte Cristo 8932 24.3 22.9 106 21.2 21.8 97 Salt River Summit 7640 13.3 11.2 119 13.3 14.2 94 Spring Creek Divide 9000 22.5 19.6 115 21.4 20.4 105 ----- ----- 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.