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 26 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.6 14.6 121 19.7 19.5 101 Black Bear 8170 39.1 34.2 114 39.7 35.4 112 Blind Bull Sum 8650 31.3 21.2 148 18.7 18.2 103 Cottonwood Creek 7670 20.9 20.5 102 23.9 22.9 104 East Rim Divide 7930 11.6 9.7 120 11.5 11.0 105 Grand Targhee 9260 44.6 34.2 130 28.2 28.1 100 Granite Creek 6770 17.3 14.8 117 20.1 18.6 108 Grassy Lake 7265 30.8 30.5 101 33.8 33.6 101 Gros Ventre Summit 8750 14.3 12.1 118 13.6 11.9 114 Gunsight Pass 9820 15.4 12.7 121 14.9 12.6 118 Lewis Lake Divide 7850 37.3 28.8 130 36.8 33.1 111 Phillips Bench 8200 26.3 23.3 113 26.3 26.1 101 Salt River Summit 7640 10.8 12.4 87 12.3 15.5 79 Snake River Station 6920 18.0 15.7 115 22.7 21.0 108 Spring Creek Divide 9000 25.8 22.1 117 23.6 22.2 106 Thumb Divide 7980 18.6 14.9 125 18.0 17.1 105 Togwotee Pass 9580 30.3 21.2 143 30.4 22.4 136 Two Ocean Plateau 9240 35.6 24.8 144 28.0 25.2 111 Willow Creek 8080 32.3 25.8 125 33.4 31.0 108 Younts Peak 8350 -M 13.7 * -M 14.6 * ----- ----- Basin Index (%) 121 107 MADISON-GALLATIN Black Bear 8170 39.1 34.2 114 39.7 35.4 112 Canyon 7870 16.5 12.0 138 18.8 15.0 125 Madison Plateau 7750 27.2 20.7 131 26.4 24.4 108 West Yellowstone 6700 13.4 10.1 133 16.9 13.0 130 Whiskey Creek 6800 16.3 14.5 112 18.7 18.7 100 ----- ----- Basin Index (%) 123 113 YELLOWSTONE Beartooth Lake 9360 36.6 20.3 180 33.0 18.2 181 Burnt Mtn 5880 6.7 4.7 143 13.1 11.2 117 Canyon 7870 16.5 12.0 138 18.8 15.0 125 Cole Creek 7850 13.0 12.7 102 -M 11.3 * Evening Star 9200 37.9 23.3 163 40.9 25.2 162 Fisher Creek 9100 49.6 28.7 173 43.8 29.4 149 Northeast Entrance 7350 13.5 9.6 141 17.3 11.3 153 Parker Peak 9400 31.4 18.2 173 27.4 16.2 169 Sylvan Lake 8420 24.1 18.7 129 25.4 20.6 123 Thumb Divide 7980 18.6 14.9 125 18.0 17.1 105 Two Ocean Plateau 9240 35.6 24.8 144 28.0 25.2 111 White Mill 8700 38.8 20.9 186 29.9 21.9 137 Wolverine 7650 19.9 8.9 224 19.4 11.3 172 ----- ----- Basin Index (%) 157 142 WIND RIVER Burroughs Creek 8750 15.5 -M * 17.0 -M * Castle Creek 8400 7.9 -M * 9.4 -M * Cold Springs 9630 9.4 6.8 138 9.3 9.0 103 Deer Park 9700 11.8 14.1 84 14.4 17.7 81 Hobbs Park 10100 16.4 12.7 129 13.9 11.6 120 Kirwin 9550 18.8 8.8 214 16.9 10.4 162 Little Warm 9370 14.9 9.8 152 15.5 11.7 132 Owl Creek 8975 3.9 4.8 81 5.8 5.3 109 South Pass 9040 11.1 14.4 77 -M 15.9 * St. Lawrence Alt 8620 3.1 6.5 48 8.2 7.9 104 Togwotee Pass 9580 30.3 21.2 143 30.4 22.4 136 Townsend Creek 8700 6.5 8.7 75 8.3 10.5 79 ----- ----- Basin Index (%) 117 115 BIGHORN BASIN Bald Mtn. 9380 19.5 17.0 115 13.8 15.4 90 Bear Trap Meadow 8200 9.3 5.2 179 9.8 7.5 131 Bone Springs Div 9350 17.6 14.5 121 13.5 14.0 96 Grave Springs 8550 6.5 8.4 77 -M 9.3 * Kirwin 9550 18.8 8.8 214 16.9 10.4 162 Marquette 8760 5.5 -M * 9.2 -M * Middle Powder 7760 8.2 10.5 78 -M 10.5 * Owl Creek 8975 3.9 4.8 81 5.8 5.3 109 Powder River Pass 9480 15.6 9.6 162 14.5 11.4 127 Shell Creek 9580 19.8 13.5 147 14.8 12.4 119 Timber Creek 7950 3.3 4.2 79 -M 6.5 * ----- ----- Basin Index (%) 127 117 SHOSHONE RIVER Blackwater 9780 32.3 21.2 152 30.0 18.8 160 Evening Star 9200 37.9 23.3 163 40.9 25.2 162 Marquette 8760 5.5 -M * 9.2 -M * Sylvan Road 7120 13.4 10.8 124 20.2 15.5 130 Younts Peak 8350 -M 13.7 * -M 14.6 * ----- ----- Basin Index (%) 151 153 POWDER RIVER Bear Trap Meadow 8200 9.3 5.2 179 9.8 7.5 131 Cloud Peak Reservoir 9860 14.4 13.4 107 13.0 11.8 110 Grave Springs 8550 6.5 8.4 77 -M 9.3 * Hansen Sawmill 8360 8.0 6.0 133 9.3 7.6 122 Middle Powder 7760 8.2 10.5 78 -M 10.5 * Powder River Pass 9480 15.6 9.6 162 14.5 11.4 127 Soldier Park 8720 6.4 -M * 9.0 -M * ----- ----- Basin Index (%) 117 122 TONGUE RIVER Big Goose 7990 7.2 8.2 88 7.4 9.6 77 Bone Springs Div 9350 17.6 14.5 121 13.5 14.0 96 Burgess Junction 7880 8.7 10.3 84 7.3 10.9 67 Dome Lake 8880 13.7 10.8 127 10.8 12.0 90 Little Goose 8870 8.8 -M * 10.8 -M * Sucker Creek 8880 9.6 11.1 86 7.2 12.7 57 Tie Creek 6870 3.9 5.3 74 -M 10.1 * ----- ----- Basin Index (%) 101 78 BELLE FOURCHE Cole Canyon 5910 6.4 5.7 112 8.4 8.2 102 ----- ----- Basin Index (%) 112 102 CHEYENNE RIVER BASIN Blind Park 6890 7.0 7.1 99 10.3 10.7 96 North Rapid Creek 6130 6.7 6.7 100 7.9 8.9 89 ----- ----- Basin Index (%) 99 93 UPPER N. PLATTE Arapaho Ridge 10960 18.7 18.7 100 18.3 20.3 90 Blackhall Mtn 9820 26.1 -M * 25.3 -M * Columbine 9160 21.4 22.0 97 21.9 23.7 92 Divide Peak 8880 12.9 18.5 70 16.6 19.7 84 Joe Wright 10120 17.4 19.6 89 26.7 23.7 113 Laprele Creek 8375 5.9 9.4 63 7.2 11.2 64 Med Bow 10500 37.5 -M * 30.6 -M * North French Creek 10130 25.4 26.8 95 24.8 24.6 101 Never Summer 10280 17.8 18.6 96 14.7 -M * Old Battle 10000 23.8 27.8 86 22.9 32.4 71 Rawah 9020 10.1 9.9 102 14.1 12.8 110 Sage Creek Basin 7850 8.2 12.0 68 9.8 13.3 74 Sand Lake 10050 24.4 25.9 94 20.6 22.5 92 South Brush Creek 8440 9.1 11.7 78 10.9 13.9 78 Tower 10500 33.2 41.6 80 26.4 36.8 72 Webber Springs 9250 17.8 22.0 81 20.3 24.6 83 Willow Creek Pass 9540 12.7 11.3 112 13.4 12.1 111 Zirkel 9340 26.1 25.7 102 29.6 26.2 113 ----- ----- Basin Index (%) 89 89 SWEETWATER Deer Park 9700 11.8 14.1 84 14.4 17.7 81 Larsen Creek 9000 10.8 11.7 92 11.0 -M * South Pass 9040 11.1 14.4 77 -M 15.9 * ----- ----- Basin Index (%) 84 81* LOWER N. PLATTE Casper Mtn. 7900 7.3 12.8 57 5.9 13.3 44 Laprele Creek 8375 5.9 9.4 63 7.2 11.2 64 Reno Hill 8400 9.0 12.5 72 10.3 13.7 75 Windy Peak 7900 5.8 7.6 76 7.4 9.5 78 ----- ----- Basin Index (%) 66 65 LARAMIE RIVER Brooklyn Lake 10240 23.3 18.5 126 23.1 19.2 120 Cinnabar Park 9574 20.0 19.4 103 23.1 22.2 104 Crow Creek 8330 3.6 6.9 52 9.9 9.7 102 Deadman Hill 10220 19.2 14.6 132 18.3 15.6 117 Rawah 9020 10.1 9.9 102 14.1 12.8 110 Roach 9700 12.6 14.5 87 15.9 17.5 91 ----- ----- Basin Index (%) 106 108 S. PLATTE Black Mountain 8920 9.8 -M * 12.5 -M * Crow Creek 8330 3.6 6.9 52 9.9 9.7 102 Deadman Hill 10220 19.2 14.6 132 18.3 15.6 117 ----- ----- Basin Index (%) 106 111 LITTLE SNAKE RIVER Battle Mountain 7440 6.2 11.1 56 9.6 14.0 69 Divide Peak 8880 12.9 18.5 70 16.6 19.7 84 Elk River 8700 13.9 17.7 79 15.3 18.5 83 Little Snake River 8915 20.1 21.7 93 26.0 27.3 95 Old Battle 10000 23.8 27.8 86 22.9 32.4 71 Sage Creek Basin 7850 8.2 12.0 68 9.8 13.3 74 Sandstone RS 8150 8.7 12.9 67 8.3 17.1 49 Whiskey Park 8950 22.6 24.7 91 23.8 25.8 92 ----- ----- Basin Index (%) 80 79 UPPER GREEN RIVER Big Sandy Opening 9080 12.9 12.0 108 12.7 12.2 104 Blind Bull Sum 8650 31.3 21.2 148 18.7 18.2 103 East Rim Divide 7930 11.6 9.7 120 11.5 11.0 105 Elkhart Park G.S. 9400 11.9 11.4 104 11.4 12.3 93 Gros Ventre Summit 8750 14.3 12.1 118 13.6 11.9 114 Gunsight Pass 9820 15.4 12.7 121 14.9 12.6 118 Kendall R.S. 7740 14.1 11.3 125 14.5 13.4 108 Loomis Park 8240 17.0 14.1 121 17.5 16.1 109 New Fork Lake 8340 11.4 9.8 116 10.7 10.1 106 Pocket Creek 9360 8.7 -M * 8.7 -M * Snider Basin 8060 12.7 11.4 111 14.1 13.1 108 Spring Creek Divide 9000 25.8 22.1 117 23.6 22.2 106 Triple Peak 8500 27.9 20.4 137 29.1 23.5 124 ----- ----- Basin Index (%) 123 109 LOWER GREEN RIVER Blacks Fork Jct 8869 7.4 -M * 8.5 -M * Buck Pasture 9632 11.7 -M * 12.6 -M * EF Blacks Fork GS 9360 10.6 -M * 5.8 -M * Hams Fork 7840 9.2 10.6 87 9.1 10.5 87 Hewinta 9500 8.7 10.0 87 10.7 12.8 84 Hickerson Park 9122 6.6 6.9 96 7.5 9.2 82 Hole-in-Rock 9168 6.9 6.9 100 8.1 8.6 94 Indian Creek 9425 20.7 22.4 92 15.1 20.9 72 Kelley R.S. 8180 13.0 14.2 92 14.1 16.8 84 Spirit Lk 10235 10.4 -M * 11.6 -M * Steel Creek Park 10158 13.3 14.0 95 13.2 14.8 89 ----- ----- Basin Index (%) 92 83 UPPER BEAR RIVER Bear River RS 8777 7.9 -M * 10.2 -M * Bug Lake 7987 14.7 17.4 84 15.5 17.9 87 Burts Miller Ranch 8000 5.2 -M * 6.2 -M * Chalk Creek #1 9171 14.5 22.3 65 15.6 23.1 68 Hayden Fork 9130 13.0 14.6 89 15.6 19.3 81 Kelley R.S. 8180 13.0 14.2 92 14.1 16.8 84 Lily Lake 9133 8.9 11.7 76 11.0 15.6 71 Monte Cristo 8932 21.3 25.2 85 20.7 24.0 86 Salt River Summit 7640 10.8 12.4 87 12.3 15.5 79 ----- ----- Basin Index (%) 82 79 ----------------------------------------------------------------------------- -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.