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 MONDAY: MARCH 23 , 2020 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 15.8 14.6 108 16.3 19.2 85 Black Bear 8170 30.7 33.1 93 28.7 34.9 82 Blind Bull Sum 8650 22.8 20.8 110 13.7 17.9 77 Cottonwood Creek 7670 24.1 20.3 119 26.3 22.3 118 East Rim Divide 7930 10.9 9.6 114 8.7 10.7 81 Grand Targhee 9260 38.7 33.4 116 27.4 27.4 100 Granite Creek 6770 16.1 14.7 110 14.8 18.3 81 Grassy Lake 7265 30.6 29.7 103 30.2 33.1 91 Gros Ventre Summit 8750 11.4 11.8 97 11.0 11.6 95 Gunsight Pass 9820 12.1 12.3 98 12.0 12.2 98 Lewis Lake Divide 7850 24.0 28.2 85 27.3 32.5 84 Phillips Bench 8200 27.3 22.8 120 26.6 25.6 104 Salt River Summit 7640 13.7 12.2 112 13.9 15.2 91 Snake River Station 6920 16.5 15.5 106 19.1 20.6 93 Spring Creek Divide 9000 23.5 21.6 109 22.1 21.8 101 Thumb Divide 7980 14.8 14.4 103 14.4 16.7 86 Togwotee Pass 9580 25.5 20.9 122 24.6 22.0 112 Two Ocean Plateau 9240 27.3 24.4 112 22.0 24.8 89 Willow Creek 8080 32.9 25.3 130 31.2 30.4 103 Younts Peak 8350 16.3 13.6 120 12.8 14.3 90 ----- ----- Basin Index (%) 109 93 MADISON-GALLATIN Black Bear 8170 30.7 33.1 93 28.7 34.9 82 Canyon 7870 13.5 11.8 114 13.6 14.7 93 Madison Plateau 7750 19.5 20.4 96 17.1 23.9 72 West Yellowstone 6700 10.6 10.0 106 8.5 12.8 66 Whiskey Creek 6800 14.2 14.4 99 15.9 18.3 87 ----- ----- Basin Index (%) 99 80 YELLOWSTONE Beartooth Lake 9360 20.4 19.8 103 19.0 18.0 106 Burnt Mtn 5880 7.2 4.7 153 12.4 11.0 113 Canyon 7870 13.5 11.8 114 13.6 14.7 93 Cole Creek 7850 15.5 12.3 126 12.2 11.0 111 Evening Star 9200 25.0 22.7 110 27.1 24.8 109 Fisher Creek 9100 29.2 28.4 103 29.9 28.9 103 Northeast Entrance 7350 10.2 9.3 110 11.6 11.1 105 Parker Peak 9400 23.5 17.9 131 21.4 15.9 135 Sylvan Lake 8420 19.3 18.4 105 21.0 20.2 104 Thumb Divide 7980 14.8 14.4 103 14.4 16.7 86 Two Ocean Plateau 9240 27.3 24.4 112 22.0 24.8 89 White Mill 8700 23.9 20.4 117 19.9 21.5 93 Wolverine 7650 12.0 8.9 135 12.0 11.1 108 Younts Peak 8350 16.3 13.6 120 12.8 14.3 90 ----- ----- Basin Index (%) 114 102 WIND RIVER Burroughs Creek 8750 11.9 -M * 12.9 -M * Castle Creek 8400 5.2 -M * 5.7 -M * Cold Springs 9630 6.9 6.6 105 6.1 8.7 70 Deer Park 9700 11.3 13.9 81 10.0 17.4 57 Hobbs Park 10100 11.8 12.2 97 9.9 11.3 88 Kirwin 9550 10.3 8.5 121 9.1 10.2 89 Little Warm 9370 10.7 9.4 114 8.4 11.3 74 Owl Creek 8975 6.1 4.7 130 6.2 5.1 122 South Pass 9040 10.0 14.3 70 8.6 15.5 55 St. Lawrence Alt 8620 4.8 6.4 75 6.4 7.7 83 Togwotee Pass 9580 25.5 20.9 122 24.6 22.0 112 Townsend Creek 8700 8.1 8.5 95 8.1 10.2 79 ----- ----- Basin Index (%) 100 82 BIGHORN BASIN Bald Mtn. 9380 19.6 16.6 118 15.2 15.1 101 Bear Trap Meadow 8200 8.8 5.2 169 8.7 7.3 119 Bone Springs Div 9350 16.4 14.2 115 13.3 13.6 98 Grave Springs 8550 9.4 8.3 113 9.9 9.2 108 Kirwin 9550 10.3 8.5 121 9.1 10.2 89 Marquette 8760 6.5 -M * 8.0 -M * Middle Powder 7760 11.9 10.2 117 11.3 10.3 110 Owl Creek 8975 6.1 4.7 130 6.2 5.1 122 Powder River Pass 9480 11.8 9.4 126 11.9 11.1 107 Shell Creek 9580 13.9 13.1 106 13.1 12.1 108 Timber Creek 7950 5.5 4.1 134 6.3 6.3 100 ----- ----- Basin Index (%) 121 105 SHOSHONE RIVER Blackwater 9780 20.1 21.0 96 20.4 18.4 111 Evening Star 9200 25.0 22.7 110 27.1 24.8 109 Marquette 8760 6.5 -M * 8.0 -M * Sylvan Lake 8420 19.3 18.4 105 21.0 20.2 104 Sylvan Road 7120 11.6 10.6 109 -M 15.3 * Younts Peak 8350 16.3 13.6 120 12.8 14.3 90 ----- ----- Basin Index (%) 107 105 POWDER RIVER Bear Trap Meadow 8200 8.8 5.2 169 8.7 7.3 119 Cloud Peak Reservoir 9860 13.4 13.2 102 12.5 11.5 109 Grave Springs 8550 9.4 8.3 113 9.9 9.2 108 Hansen Sawmill 8360 6.9 5.8 119 7.9 7.4 107 Middle Powder 7760 11.9 10.2 117 11.3 10.3 110 Powder River Pass 9480 11.8 9.4 126 11.9 11.1 107 Soldier Park 8720 6.4 -M * 8.0 -M * ----- ----- Basin Index (%) 119 110 TONGUE RIVER Big Goose 7990 8.5 8.0 106 9.2 9.4 98 Bone Springs Div 9350 16.4 14.2 115 13.3 13.6 98 Burgess Junction 7880 10.7 9.8 109 11.6 10.7 108 Dome Lake 8880 12.8 10.5 122 8.9 11.7 76 Little Goose 8870 10.2 -M * 7.8 -M * Sucker Creek 8880 12.8 11.0 116 11.9 12.5 95 Tie Creek 6870 8.0 5.1 157 12.1 9.9 122 ----- ----- Basin Index (%) 118 99 BELLE FOURCHE Blind Park 6890 6.4 7.1 90 7.8 10.6 74 Cole Canyon 5910 -M 5.6 * -M 8.0 * ----- ----- Basin Index (%) 90 74 CHEYENNE RIVER BASIN Blind Park 6890 6.4 7.1 90 7.8 10.6 74 North Rapid Creek 6130 7.3 6.6 111 7.7 8.7 89 ----- ----- Basin Index (%) 100 80 UPPER N. PLATTE Arapaho Ridge 10960 22.0 18.2 121 21.0 19.9 106 Blackhall Mtn 9820 28.6 -M * 27.4 -M * Columbine 9160 31.0 22.1 140 27.4 23.3 118 Divide Peak 8880 19.5 18.0 108 20.1 19.4 104 Joe Wright 10120 -M 19.3 * -M 23.2 * Laprele Creek 8375 11.6 9.3 125 11.7 11.0 106 Med Bow 10500 41.1 -M * 32.4 -M * Never Summer 10280 19.1 18.2 105 14.2 -M * North French Creek 10130 31.5 26.1 121 30.3 24.0 126 Old Battle 10000 29.5 27.1 109 27.0 31.9 85 Rawah 9020 12.3 9.7 127 13.9 12.4 112 Sage Creek Basin 7850 15.1 11.6 130 11.3 13.0 87 Sand Lake 10050 27.3 25.3 108 25.0 22.0 114 South Brush Creek 8440 12.9 11.3 114 12.2 13.6 90 Tower 10500 44.5 40.7 109 39.6 36.2 109 Webber Springs 9250 21.0 21.5 98 22.8 24.2 94 Whiskey Park 8950 31.8 24.5 130 30.0 25.3 119 Willow Creek Pass 9540 12.8 11.1 115 12.0 11.9 101 Zirkel 9340 27.9 25.5 109 29.6 25.6 116 ----- ----- Basin Index (%) 115 106 SWEETWATER Deer Park 9700 11.3 13.9 81 10.0 17.4 57 Larsen Creek 9000 -M 11.4 * 6.9 -M * South Pass 9040 10.0 14.3 70 8.6 15.5 55 ----- ----- Basin Index (%) 76 57 LOWER N. PLATTE Casper Mtn. 7900 14.7 12.6 117 9.9 13.0 76 Laprele Creek 8375 11.6 9.3 125 11.7 11.0 106 Reno Hill 8400 15.6 12.3 127 15.9 13.2 120 Windy Peak 7900 9.3 7.4 126 8.2 9.2 89 ----- ----- Basin Index (%) 123 98 LARAMIE RIVER Brooklyn Lake 10240 25.8 18.0 143 24.5 18.8 130 Cinnabar Park 9574 22.6 18.7 121 24.3 21.6 112 Crow Creek 8330 7.3 6.9 106 10.1 9.1 111 Deadman Hill 10220 17.7 14.2 125 15.6 15.2 103 Rawah 9020 12.3 9.7 127 13.9 12.4 112 Roach 9700 14.8 14.3 103 14.9 17.1 87 Windy Peak 7900 9.3 7.4 126 8.2 9.2 89 ----- ----- Basin Index (%) 123 108 S. PLATTE Black Mountain 8920 10.3 -M * 12.3 -M * Crow Creek 8330 7.3 6.9 106 10.1 9.1 111 Deadman Hill 10220 17.7 14.2 125 15.6 15.2 103 ----- ----- Basin Index (%) 118 106 LITTLE SNAKE RIVER Battle Mountain 7440 12.1 11.3 107 13.2 13.7 96 Divide Peak 8880 19.5 18.0 108 20.1 19.4 104 Elk River 8700 20.0 17.5 114 16.8 18.2 92 Little Snake River 8915 26.6 21.4 124 30.9 26.8 115 Old Battle 10000 29.5 27.1 109 27.0 31.9 85 Sage Creek Basin 7850 15.1 11.6 130 11.3 13.0 87 Sandstone RS 8150 16.1 12.7 127 14.7 16.9 87 Whiskey Park 8950 31.8 24.5 130 30.0 25.3 119 ----- ----- Basin Index (%) 118 99 UPPER GREEN RIVER Big Sandy Opening 9080 8.4 11.9 71 7.2 12.0 60 Blind Bull Sum 8650 22.8 20.8 110 13.7 17.9 77 East Rim Divide 7930 10.9 9.6 114 8.7 10.7 81 Elkhart Park G.S. 9400 9.7 11.0 88 9.5 12.0 79 Gros Ventre Summit 8750 11.4 11.8 97 11.0 11.6 95 Gunsight Pass 9820 12.1 12.3 98 12.0 12.2 98 Indian Creek 9425 20.6 21.8 94 14.3 20.5 70 Kendall R.S. 7740 9.8 11.4 86 9.6 13.1 73 Loomis Park 8240 13.5 13.7 99 16.2 15.7 103 New Fork Lake 8340 10.2 9.5 107 8.0 9.8 82 Pocket Creek 9360 -M -M * 7.1 -M * Snider Basin 8060 12.4 11.2 111 12.7 12.9 98 Spring Creek Divide 9000 23.5 21.6 109 22.1 21.8 101 Triple Peak 8500 24.1 20.0 120 24.0 23.1 104 ----- ----- Basin Index (%) 102 87 LOWER GREEN RIVER Blacks Fork Jct 8869 7.9 -M * 11.2 -M * Buck Pasture 9632 17.0 -M * 16.2 -M * EF Blacks Fork GS 9360 13.8 -M * 11.0 -M * Hams Fork 7840 11.6 10.5 110 10.0 10.3 97 Hewinta 9500 10.4 9.9 105 13.5 12.6 107 Hickerson Park 9122 10.3 6.8 151 10.8 9.1 119 Hole-in-Rock 9168 10.9 6.8 160 10.5 8.5 124 Indian Creek 9425 20.6 21.8 94 14.3 20.5 70 Kelley R.S. 8180 13.9 13.8 101 14.4 16.5 87 Spirit Lk 10235 16.9 -M * 17.4 -M * Steel Creek Park 10158 16.3 13.7 119 16.9 14.6 116 ----- ----- Basin Index (%) 113 98 UPPER BEAR RIVER Bear River RS 8777 8.9 -M * 10.1 -M * Bug Lake 7987 17.0 17.0 100 15.9 17.7 90 Burts Miller Ranch 8000 5.7 -M * 6.4 -M * Chalk Creek #1 9171 18.6 21.9 85 17.0 22.6 75 Hayden Fork 9130 15.7 14.5 108 18.8 18.9 99 Kelley R.S. 8180 13.9 13.8 101 14.4 16.5 87 Lily Lake 9133 11.2 11.5 97 11.7 15.3 76 Monte Cristo 8932 25.8 24.9 104 22.5 23.5 96 Salt River Summit 7640 13.7 12.2 112 13.9 15.2 91 Spring Creek Divide 9000 23.5 21.6 109 22.1 21.8 101 ----- ----- 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.