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 FRIDAY: MARCH 24 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.5 14.6 168 37.8 19.3 196 Black Bear 8170 43.2 33.4 129 49.9 35.1 142 Blind Bull Sum 8650 41.2 21.0 196 -M 17.9 * Cottonwood Creek 7670 26.0 20.4 127 35.4 22.5 157 East Rim Divide 7930 17.5 9.7 180 20.4 10.8 189 Grand Targhee 9260 41.5 33.6 124 37.9 27.5 138 Granite Creek 6770 28.2 14.8 191 34.6 18.4 188 Grassy Lake 7265 34.3 30.0 114 51.0 33.3 153 Gros Ventre Summit 8750 -M 11.9 * -M 11.7 * Gunsight Pass 9820 20.2 12.4 163 22.7 12.4 183 Lewis Lake Divide 7850 40.2 28.4 142 52.0 32.7 159 Phillips Bench 8200 34.7 22.9 152 44.4 25.8 172 Salt River Summit 7760 19.4 12.2 159 -M 15.3 * Snake River Station 6920 19.4 15.5 125 33.6 20.8 162 Spring Creek Divide 9000 37.8 21.8 173 37.9 21.9 173 Thumb Divide 7980 22.8 14.6 156 26.6 16.8 158 Togwotee Pass 9580 31.5 21.0 150 36.1 22.2 163 Two Ocean Plateau 9240 -M 24.5 * -M 24.9 * Willow Creek 8380 29.0 25.3 115 46.3 30.6 151 Younts Peak 8350 24.7 13.7 180 30.0 14.4 208 ----- ----- Basin Index (%) 147 164 MADISON-GALLATIN Black Bear 8170 43.2 33.4 129 49.9 35.1 142 Canyon 7870 17.0 11.9 143 24.4 14.8 165 Madison Plateau 7750 25.3 20.4 124 33.7 24.1 140 West Yellowstone 6700 10.1 10.0 101 21.8 12.9 169 Whiskey Creek 6800 13.3 14.4 92 25.1 18.4 136 ----- ----- Basin Index (%) 121 147 YELLOWSTONE Beartooth Lake 9360 30.7 20.0 154 26.3 18.1 145 Burnt Mtn 5880 2.4 4.8 50 12.6 11.2 112 Canyon 7870 17.0 11.9 143 24.4 14.8 165 Cole Creek 7850 9.5 12.4 77 6.8 11.1 61 Evening Star 9200 36.4 22.9 159 42.9 24.9 172 Fisher Creek 9100 41.5 28.4 146 44.6 29.2 153 Northeast Entrance 7350 9.8 9.4 104 19.3 11.2 172 Parker Peak 9400 31.6 17.9 177 32.3 16.0 202 Sylvan Lake 8420 21.9 18.5 118 35.3 20.3 174 Thumb Divide 7980 22.8 14.6 156 26.6 16.8 158 Two Ocean Plateau 9240 -M 24.5 * -M 24.9 * White Mill 8700 33.0 20.6 160 33.9 21.7 156 Wolverine 7650 9.1 8.9 102 20.0 11.2 179 ----- ----- Basin Index (%) 140 157 WIND RIVER Burroughs Creek 8750 23.1 -M * 25.8 -M * Castle Creek 8400 11.1 -M * 14.3 -M * Cold Springs 9630 12.6 6.6 191 15.3 8.8 174 Deer Park 9700 28.6 14.0 204 33.6 17.6 191 Hobbs Park 10100 23.3 12.4 188 21.8 11.4 191 Kirwin 9550 19.5 8.6 227 21.7 10.2 213 Little Warm 9370 16.2 9.6 169 21.9 11.5 190 Owl Creek 8975 6.8 4.7 145 9.2 5.2 177 South Pass 9040 26.9 14.4 187 24.3 15.7 155 St. Lawrence Alt 8620 5.9 6.4 92 13.0 7.8 167 Togwotee Pass 9580 31.5 21.0 150 36.1 22.2 163 Townsend Creek 8700 12.9 8.5 152 16.6 10.3 161 ----- ----- Basin Index (%) 173 177 BIGHORN BASIN Bald Mtn. 9380 17.6 16.7 105 14.9 15.2 98 Bear Trap Meadow 8200 4.3 5.2 83 6.6 7.4 89 Bone Springs Div 9350 16.6 14.3 116 15.3 13.7 112 Grave Springs 8550 6.1 8.3 73 6.5 9.3 70 Kirwin 9550 19.5 8.6 227 21.7 10.2 213 Marquette 8760 7.6 -M * 12.3 -M * Middle Powder 7760 6.2 10.3 60 6.2 10.4 60 Owl Creek 8975 6.8 4.7 145 9.2 5.2 177 Powder River Pass 9480 7.1 9.4 76 10.6 11.2 95 Shell Creek 9580 15.0 13.2 114 12.0 12.2 98 Timber Creek 7950 4.5 4.1 110 7.6 6.4 119 ----- ----- Basin Index (%) 109 109 SHOSHONE RIVER Blackwater 9780 35.9 21.1 170 39.7 18.5 215 Evening Star 9200 36.4 22.9 159 42.9 24.9 172 Marquette 8760 7.6 -M * 12.3 -M * Sylvan Road 7120 12.0 10.7 112 29.6 15.4 192 Younts Peak 8350 24.7 13.7 180 30.0 14.4 208 ----- ----- Basin Index (%) 159 194 POWDER RIVER Bear Trap Meadow 8200 4.3 5.2 83 6.6 7.4 89 Cloud Peak Reservoir 9860 12.4 13.3 93 13.5 11.6 116 Grave Springs 8550 6.1 8.3 73 6.5 9.3 70 Hansen Sawmill 8360 7.6 5.9 129 10.1 7.5 135 Middle Powder 7760 6.2 10.3 60 6.2 10.4 60 Powder River Pass 9480 7.1 9.4 76 10.6 11.2 95 Soldier Park 8720 11.3 -M * 9.9 -M * ----- ----- Basin Index (%) 83 93 TONGUE RIVER Big Goose 7990 8.7 8.1 107 10.2 9.5 107 Bone Springs Div 9350 16.6 14.3 116 15.3 13.7 112 Burgess Junction 7880 8.6 9.9 87 9.5 10.8 88 Dome Lake 8880 12.9 10.6 122 12.9 11.8 109 Little Goose 8870 9.7 -M * 12.8 -M * Sucker Creek 8880 10.2 11.1 92 10.2 12.6 81 Tie Creek 6870 2.7 5.2 52 10.6 10.0 106 ----- ----- Basin Index (%) 101 100 BELLE FOURCHE Cole Canyon 5910 .8 5.6 14 6.6 8.1 81 ----- ----- Basin Index (%) 14 81 CHEYENNE RIVER BASIN Blind Park 6890 1.3 7.1 18 7.9 10.6 75 North Rapid Creek 6130 2.6 6.7 39 6.7 8.8 76 ----- ----- Basin Index (%) 28 75 UPPER N. PLATTE Arapaho Ridge 10960 22.7 18.4 123 23.7 20.1 118 Blackhall Mtn 9820 33.9 -M * 35.2 -M * Columbine 9160 20.5 22.1 93 26.0 23.4 111 Divide Peak 8880 15.2 18.2 84 20.9 19.6 107 Joe Wright 10120 16.5 19.4 85 25.8 23.4 110 Laprele Creek 8375 10.0 9.3 108 10.7 11.1 96 Med Bow 10500 36.9 -M * 32.6 -M * North French Creek 10130 22.9 26.3 87 25.2 24.3 104 Never Summer 10280 20.8 18.3 114 17.4 -M * Old Battle 10000 35.4 27.3 130 36.4 32.1 113 Rawah 9020 8.8 9.8 90 15.2 12.5 122 Sage Creek Basin 7850 8.4 11.8 71 15.2 13.1 116 Sand Lake 10050 28.3 25.5 111 25.5 22.2 115 South Brush Creek 8440 6.2 11.5 54 11.6 13.7 85 Tower 10500 38.7 41.0 94 41.7 36.4 115 Webber Springs 9250 26.0 21.6 120 31.6 24.4 130 Willow Creek Pass 9540 16.3 11.2 146 17.1 12.0 142 Zirkel 9340 34.4 25.5 135 40.2 25.8 156 ----- ----- Basin Index (%) 104 117 SWEETWATER Deer Park 9700 28.6 14.0 204 33.6 17.6 191 Larsen Creek 9000 16.7 11.5 145 21.9 -M * South Pass 9040 26.9 14.4 187 24.3 15.7 155 ----- ----- Basin Index (%) 181 174 LOWER N. PLATTE Casper Mtn. 7900 9.1 12.6 72 10.3 13.2 78 Laprele Creek 8375 10.0 9.3 108 10.7 11.1 96 Reno Hill 8400 10.5 12.4 85 11.9 13.4 89 Windy Peak 7900 7.8 7.5 104 10.0 9.4 106 ----- ----- Basin Index (%) 89 91 LARAMIE RIVER Brooklyn Lake 10240 23.2 18.2 127 21.7 19.0 114 Cinnabar Park 9574 16.5 18.9 87 20.8 21.8 95 Crow Creek 8330 1.1 6.9 16 8.1 9.4 86 Deadman Hill 10220 19.2 14.3 134 18.3 15.4 119 Rawah 9020 8.8 9.8 90 15.2 12.5 122 Roach 9700 15.1 14.3 106 18.7 17.2 109 ----- ----- Basin Index (%) 102 108 S. PLATTE Black Mountain 8920 8.9 -M * 10.6 -M * Crow Creek 8330 1.1 6.9 16 8.1 9.4 86 Deadman Hill 10220 19.2 14.3 134 18.3 15.4 119 ----- ----- Basin Index (%) 96 106 LITTLE SNAKE RIVER Battle Mountain 7440 4.3 11.2 38 15.6 13.9 112 Divide Peak 8880 15.2 18.2 84 20.9 19.6 107 Elk River 8700 13.8 17.5 79 19.1 18.3 104 Little Snake River 8915 26.0 21.5 121 36.9 27.0 137 Old Battle 10000 35.4 27.3 130 36.4 32.1 113 Sage Creek Basin 7850 8.4 11.8 71 15.2 13.1 116 Sandstone RS 8150 9.1 12.8 71 15.2 17.0 89 Whiskey Park 8950 24.7 24.6 100 28.4 25.5 111 ----- ----- Basin Index (%) 94 113 UPPER GREEN RIVER Big Sandy Opening 9080 19.8 11.9 166 22.3 12.0 186 Blind Bull Sum 8650 41.2 21.0 196 -M 17.9 * East Rim Divide 7930 17.5 9.7 180 20.4 10.8 189 Elkhart Park G.S. 9400 18.1 11.1 163 22.9 12.1 189 Gros Ventre Summit 8750 -M 11.9 * -M 11.7 * Gunsight Pass 9820 20.2 12.4 163 22.7 12.4 183 Kendall R.S. 7740 21.3 11.4 187 28.1 13.2 213 Loomis Park 8240 26.3 13.8 191 31.0 15.9 195 New Fork Lake 8340 16.0 9.6 167 17.0 9.9 172 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.3 11.3 162 25.8 13.0 198 Spring Creek Divide 9000 37.8 21.8 173 37.9 21.9 173 Triple Peak 8500 34.9 20.1 174 38.6 23.2 166 ----- ----- Basin Index (%) 176 185 LOWER GREEN RIVER Blacks Fork Jct 8869 7.7 -M * 14.0 -M * Buck Pasture 9632 16.2 -M * 21.4 -M * EF Blacks Fork GS 9360 13.4 -M * 14.9 -M * Hams Fork 7840 13.8 10.5 131 19.5 10.4 188 Hewinta 9500 6.5 9.9 66 14.7 12.7 116 Hickerson Park 9122 6.4 6.8 94 9.5 9.1 104 Hole-in-Rock 9168 4.4 6.9 64 9.9 8.6 115 Indian Creek 9425 37.9 22.0 172 -M 20.6 * Kelley R.S. 8180 24.2 14.0 173 29.0 16.6 175 Spirit Lk 10235 13.6 -M * 16.2 -M * Steel Creek Park 10158 16.0 13.7 117 18.1 14.6 124 ----- ----- Basin Index (%) 130 140 UPPER BEAR RIVER Bear River RS 8777 8.0 -M * 16.1 -M * Bug Lake 7987 29.8 17.2 173 31.4 17.8 176 Burts Miller Ranch 8000 2.4 -M * 8.6 -M * Chalk Creek #1 9171 30.5 22.0 139 32.7 22.8 143 Hayden Fork 9130 17.4 14.5 120 27.5 19.0 145 Kelley R.S. 8180 24.2 14.0 173 29.0 16.6 175 Lily Lake 9133 11.5 11.6 99 17.5 15.4 114 Monte Cristo 8932 33.8 25.0 135 36.3 23.6 154 Salt River Summit 7760 19.4 12.2 159 -M 15.3 * ----- ----- Basin Index (%) 143 151 ----------------------------------------------------------------------------- -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.