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 SUNDAY: MARCH 8 , 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 13.8 99 14.2 18.0 79 Black Bear 8170 27.2 30.9 88 25.6 32.6 79 Blind Bull Sum 8650 21.1 19.0 111 12.4 16.6 75 Cottonwood Creek 7670 22.9 18.2 126 24.3 20.5 119 East Rim Divide 7930 10.3 9.2 112 8.3 10.0 83 Grand Targhee 9260 34.0 31.3 109 24.4 25.4 96 Granite Creek 6770 13.9 14.4 97 13.2 17.3 76 Grassy Lake 7265 26.5 27.2 97 26.5 30.8 86 Gros Ventre Summit 8750 9.6 10.7 90 9.5 10.7 89 Gunsight Pass 9820 10.7 11.3 95 10.7 11.4 94 Lewis Lake Divide 7850 20.3 25.9 78 23.7 30.3 78 Phillips Bench 8200 23.6 20.8 113 22.9 23.8 96 Salt River Summit 7640 12.9 11.0 117 13.1 14.1 93 Snake River Station 6920 13.9 14.9 93 16.6 19.5 85 Spring Creek Divide 9000 21.9 19.5 112 21.0 20.1 104 Thumb Divide 7980 11.9 12.8 93 11.7 15.5 75 Togwotee Pass 9580 22.5 19.2 117 21.6 20.4 106 Two Ocean Plateau 9240 23.6 22.5 105 19.2 22.9 84 Willow Creek 8080 29.9 23.8 126 28.8 28.0 103 Younts Peak 8350 14.8 12.1 122 12.1 13.2 92 ----- ----- Basin Index (%) 105 90 MADISON-GALLATIN Black Bear 8170 27.2 30.9 88 25.6 32.6 79 Canyon 7870 11.4 11.3 101 11.5 13.7 84 Madison Plateau 7750 16.9 18.8 90 14.8 22.4 66 West Yellowstone 6700 9.1 9.4 97 7.6 12.2 62 Whiskey Creek 6800 12.2 12.8 95 13.9 17.1 81 ----- ----- Basin Index (%) 92 75 YELLOWSTONE Beartooth Lake 9360 18.7 18.0 104 17.4 16.6 105 Burnt Mtn 5880 5.3 4.4 120 10.5 9.8 107 Canyon 7870 11.4 11.3 101 11.5 13.7 84 Cole Creek 7850 13.8 10.9 127 10.8 9.6 112 Evening Star 9200 23.0 20.5 112 25.0 23.1 108 Fisher Creek 9100 25.9 26.6 97 26.8 26.7 100 Northeast Entrance 7350 9.0 8.6 105 10.2 10.3 99 Parker Peak 9400 21.4 16.5 130 19.6 14.7 133 Sylvan Lake 8420 17.0 16.7 102 18.8 18.8 100 Thumb Divide 7980 11.9 12.8 93 11.7 15.5 75 Two Ocean Plateau 9240 23.6 22.5 105 19.2 22.9 84 White Mill 8700 21.1 18.9 112 17.5 19.9 88 Wolverine 7650 11.3 9.0 126 11.1 10.4 107 Younts Peak 8350 14.8 12.1 122 12.1 13.2 92 ----- ----- Basin Index (%) 109 99 WIND RIVER Burroughs Creek 8750 10.2 -M * 11.8 -M * Castle Creek 8400 4.6 -M * 5.4 -M * Cold Springs 9630 6.4 5.8 110 6.2 7.9 78 Deer Park 9700 10.3 11.6 89 9.4 16.1 58 Hobbs Park 10100 11.0 10.7 103 9.4 10.1 93 Kirwin 9550 9.5 7.6 125 8.4 9.2 91 Little Warm 9370 9.6 8.5 113 7.9 10.4 76 Owl Creek 8975 5.5 4.2 131 5.8 4.5 129 South Pass 9040 9.3 12.3 76 8.4 14.3 59 St. Lawrence Alt 8620 4.5 5.7 79 6.1 6.9 88 Togwotee Pass 9580 22.5 19.2 117 21.6 20.4 106 Townsend Creek 8700 7.9 7.2 110 8.0 9.1 88 ----- ----- Basin Index (%) 104 84 BIGHORN BASIN Bald Mtn. 9380 18.8 15.8 119 14.8 13.8 107 Bear Trap Meadow 8200 8.4 4.6 183 8.6 6.4 134 Bone Springs Div 9350 15.0 13.1 115 12.5 12.3 102 Grave Springs 8550 9.3 7.3 127 9.7 8.2 118 Kirwin 9550 9.5 7.6 125 8.4 9.2 91 Marquette 8760 5.8 -M * 7.4 -M * Middle Powder 7760 11.3 8.6 131 11.0 9.1 121 Owl Creek 8975 5.5 4.2 131 5.8 4.5 129 Powder River Pass 9480 11.1 8.3 134 11.2 10.0 112 Shell Creek 9580 12.9 12.2 106 12.3 11.0 112 Timber Creek 7950 5.0 4.0 125 5.9 5.5 107 ----- ----- Basin Index (%) 125 111 SHOSHONE RIVER Blackwater 9780 18.0 18.6 97 18.6 16.9 110 Evening Star 9200 23.0 20.5 112 25.0 23.1 108 Marquette 8760 5.8 -M * 7.4 -M * Sylvan Lake 8420 17.0 16.7 102 18.8 18.8 100 Sylvan Road 7120 10.3 9.9 104 -M 14.5 * Younts Peak 8350 14.8 12.1 122 12.1 13.2 92 ----- ----- Basin Index (%) 107 103 POWDER RIVER Bear Trap Meadow 8200 8.4 4.6 183 8.6 6.4 134 Cloud Peak Reservoir 9860 12.3 11.3 109 11.7 10.1 116 Grave Springs 8550 9.3 7.3 127 9.7 8.2 118 Hansen Sawmill 8360 6.3 5.0 126 7.3 6.4 114 Middle Powder 7760 11.3 8.6 131 11.0 9.1 121 Powder River Pass 9480 11.1 8.3 134 11.2 10.0 112 Soldier Park 8720 5.8 -M * 7.5 -M * ----- ----- Basin Index (%) 130 119 TONGUE RIVER Big Goose 7990 7.7 6.6 117 8.5 8.3 102 Bone Springs Div 9350 15.0 13.1 115 12.5 12.3 102 Burgess Junction 7880 10.0 9.0 111 11.1 9.5 117 Dome Lake 8880 11.7 9.2 127 8.3 10.4 80 Little Goose 8870 9.3 -M * 7.3 -M * Sucker Creek 8880 12.0 9.8 122 11.5 11.1 104 Tie Creek 6870 7.6 4.7 162 11.5 8.8 131 ----- ----- Basin Index (%) 122 105 BELLE FOURCHE Blind Park 6890 7.5 6.6 114 7.7 9.8 79 Cole Canyon 5910 -M 4.9 * -M 7.3 * ----- ----- Basin Index (%) 114 79 CHEYENNE RIVER BASIN Blind Park 6890 7.5 6.6 114 7.7 9.8 79 North Rapid Creek 6130 7.2 6.2 116 7.4 7.9 94 ----- ----- Basin Index (%) 115 85 UPPER N. PLATTE Arapaho Ridge 10960 19.2 17.4 110 18.7 18.4 102 Blackhall Mtn 9820 25.0 -M * 24.6 -M * Columbine 9160 28.9 20.8 139 25.7 21.3 121 Divide Peak 8880 18.0 16.8 107 18.8 17.6 107 Joe Wright 10120 18.5 18.0 103 22.8 21.0 109 Laprele Creek 8375 11.2 8.2 137 11.4 9.8 116 Med Bow 10500 38.1 -M * 30.6 -M * Never Summer 10280 16.6 16.7 99 12.4 -M * North French Creek 10130 29.7 22.1 134 28.4 22.1 129 Old Battle 10000 26.3 25.1 105 24.5 29.3 84 Rawah 9020 11.3 9.1 124 12.8 11.4 112 Sage Creek Basin 7850 14.1 11.2 126 10.8 12.2 89 Sand Lake 10050 25.5 22.0 116 23.4 20.0 117 South Brush Creek 8440 11.9 11.0 108 11.6 12.3 94 Tower 10500 39.6 37.8 105 36.0 33.4 108 Webber Springs 9250 18.5 19.8 93 20.3 22.2 91 Whiskey Park 8950 29.9 22.8 131 27.9 23.4 119 Willow Creek Pass 9540 11.2 10.1 111 10.6 10.9 97 Zirkel 9340 25.4 24.7 103 26.8 24.1 111 ----- ----- Basin Index (%) 113 107 SWEETWATER Deer Park 9700 10.3 11.6 89 9.4 16.1 58 Larsen Creek 9000 -M 10.1 * 6.6 -M * South Pass 9040 9.3 12.3 76 8.4 14.3 59 ----- ----- Basin Index (%) 82 59 LOWER N. PLATTE Casper Mtn. 7900 14.2 11.2 127 9.5 11.6 82 Laprele Creek 8375 11.2 8.2 137 11.4 9.8 116 Reno Hill 8400 14.8 11.0 135 15.2 11.8 129 Windy Peak 7900 8.9 6.4 139 7.7 8.3 93 ----- ----- Basin Index (%) 133 106 LARAMIE RIVER Brooklyn Lake 10240 23.7 16.3 145 22.9 17.0 135 Cinnabar Park 9574 21.3 17.7 120 23.0 20.3 113 Crow Creek 8330 6.9 7.0 99 9.4 8.3 113 Deadman Hill 10220 15.7 12.8 123 13.8 13.7 101 Rawah 9020 11.3 9.1 124 12.8 11.4 112 Roach 9700 12.6 13.1 96 12.8 15.6 82 Windy Peak 7900 8.9 6.4 139 7.7 8.3 93 ----- ----- Basin Index (%) 122 108 S. PLATTE Black Mountain 8920 8.9 -M * 11.0 -M * Crow Creek 8330 6.9 7.0 99 9.4 8.3 113 Deadman Hill 10220 15.7 12.8 123 13.8 13.7 101 ----- ----- Basin Index (%) 114 105 LITTLE SNAKE RIVER Battle Mountain 7440 12.6 10.3 122 12.8 12.7 101 Divide Peak 8880 18.0 16.8 107 18.8 17.6 107 Elk River 8700 18.4 16.6 111 15.6 16.8 93 Little Snake River 8915 23.9 20.2 118 28.6 25.6 112 Old Battle 10000 26.3 25.1 105 24.5 29.3 84 Sage Creek Basin 7850 14.1 11.2 126 10.8 12.2 89 Sandstone RS 8150 14.6 11.7 125 13.8 15.7 88 Whiskey Park 8950 29.9 22.8 131 27.9 23.4 119 ----- ----- Basin Index (%) 117 100 UPPER GREEN RIVER Big Sandy Opening 9080 7.9 10.6 75 6.7 11.0 61 Blind Bull Sum 8650 21.1 19.0 111 12.4 16.6 75 East Rim Divide 7930 10.3 9.2 112 8.3 10.0 83 Elkhart Park G.S. 9400 9.2 9.9 93 8.8 11.0 80 Gros Ventre Summit 8750 9.6 10.7 90 9.5 10.7 89 Gunsight Pass 9820 10.7 11.3 95 10.7 11.4 94 Indian Creek 9425 19.3 19.9 97 13.8 18.7 74 Kendall R.S. 7740 8.9 10.3 86 9.0 12.3 73 Loomis Park 8240 12.4 12.5 99 15.4 14.7 105 New Fork Lake 8340 9.1 8.8 103 7.2 9.2 78 Pocket Creek 9360 -M -M * 6.6 -M * Snider Basin 8060 12.0 10.5 114 12.4 12.0 103 Spring Creek Divide 9000 21.9 19.5 112 21.0 20.1 104 Triple Peak 8500 22.3 18.2 123 22.5 21.2 106 ----- ----- Basin Index (%) 103 88 LOWER GREEN RIVER Blacks Fork Jct 8869 6.7 -M * 10.0 -M * Buck Pasture 9632 15.1 -M * 14.6 -M * EF Blacks Fork GS 9360 12.4 -M * 8.1 -M * Hams Fork 7840 11.1 9.8 113 9.7 9.5 102 Hewinta 9500 9.2 8.5 108 12.4 11.3 110 Hickerson Park 9122 9.0 6.2 145 9.2 8.0 115 Hole-in-Rock 9168 9.1 5.9 154 9.1 7.4 123 Indian Creek 9425 19.3 19.9 97 13.8 18.7 74 Kelley R.S. 8180 13.4 12.5 107 14.0 15.2 92 Spirit Lk 10235 13.7 -M * 14.7 -M * Steel Creek Park 10158 14.4 12.3 117 15.1 13.0 116 ----- ----- Basin Index (%) 114 100 UPPER BEAR RIVER Bear River RS 8777 7.7 -M * 9.1 -M * Bug Lake 7987 16.7 15.8 106 15.2 16.1 94 Burts Miller Ranch 8000 5.5 -M * 6.1 -M * Chalk Creek #1 9171 16.8 19.4 87 15.6 20.5 76 Hayden Fork 9130 13.3 12.8 104 17.1 17.1 100 Kelley R.S. 8180 13.4 12.5 107 14.0 15.2 92 Lily Lake 9133 9.9 10.8 92 10.0 13.9 72 Monte Cristo 8932 23.2 22.5 103 20.6 21.4 96 Salt River Summit 7640 12.9 11.0 117 13.1 14.1 93 Spring Creek Divide 9000 21.9 19.5 112 21.0 20.1 104 ----- ----- Basin Index (%) 103 91 ----------------------------------------------------------------------------- -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.