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 22 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 24.2 14.7 165 37.6 19.2 196 Black Bear 8170 44.5 32.9 135 49.8 34.8 143 Blind Bull Sum 8650 40.9 20.7 198 -M 17.8 * Cottonwood Creek 7670 25.1 20.2 124 34.5 22.2 155 East Rim Divide 7930 17.3 9.6 180 19.9 10.6 188 Grand Targhee 9260 41.3 33.2 124 37.5 27.2 138 Granite Creek 6770 28.8 14.8 195 34.5 18.2 190 Grassy Lake 7265 35.2 29.6 119 50.8 32.9 154 Gros Ventre Summit 8750 -M 11.8 * -M 11.5 * Gunsight Pass 9820 19.8 12.2 162 22.4 12.2 184 Lewis Lake Divide 7850 40.1 28.0 143 51.8 32.4 160 Phillips Bench 8200 34.5 22.6 153 44.3 25.5 174 Salt River Summit 7760 19.2 12.1 159 26.9 15.1 178 Snake River Station 6920 19.3 15.4 125 33.5 20.6 163 Spring Creek Divide 9000 36.9 21.5 172 37.2 21.6 172 Thumb Divide 7980 22.4 14.3 157 26.4 16.6 159 Togwotee Pass 9580 31.0 20.8 149 35.6 21.9 163 Two Ocean Plateau 9240 -M 24.2 * -M 24.7 * Willow Creek 8380 29.4 25.3 116 45.5 30.2 151 Younts Peak 8350 25.7 13.6 189 29.8 14.3 208 ----- ----- Basin Index (%) 148 165 MADISON-GALLATIN Black Bear 8170 44.5 32.9 135 49.8 34.8 143 Canyon 7870 16.9 11.8 143 24.3 14.7 165 Madison Plateau 7750 25.5 20.2 126 33.7 23.8 142 West Yellowstone 6700 10.4 10.0 104 21.8 12.8 170 Whiskey Creek 6800 14.0 14.3 98 24.8 18.3 136 ----- ----- Basin Index (%) 125 148 YELLOWSTONE Beartooth Lake 9360 30.7 19.7 156 26.2 17.9 146 Burnt Mtn 5880 2.8 4.7 60 12.4 11.0 113 Canyon 7870 16.9 11.8 143 24.3 14.7 165 Cole Creek 7850 9.6 12.2 79 6.8 10.9 62 Evening Star 9200 36.6 22.5 163 42.7 24.7 173 Fisher Creek 9100 41.3 28.3 146 44.2 28.8 153 Northeast Entrance 7350 10.3 9.2 112 19.1 11.0 174 Parker Peak 9400 31.5 17.8 177 32.3 15.8 204 Sylvan Lake 8420 22.6 18.3 123 35.0 20.1 174 Thumb Divide 7980 22.4 14.3 157 26.4 16.6 159 Two Ocean Plateau 9240 -M 24.2 * -M 24.7 * White Mill 8700 33.0 20.2 163 33.7 21.4 157 Wolverine 7650 10.1 8.9 113 20.1 11.1 181 ----- ----- Basin Index (%) 143 158 WIND RIVER Burroughs Creek 8750 23.2 -M * 25.7 -M * Castle Creek 8400 11.3 -M * 14.4 -M * Cold Springs 9630 11.8 6.5 182 14.9 8.6 173 Deer Park 9700 27.0 13.7 197 32.2 17.4 185 Hobbs Park 10100 21.7 12.1 179 20.4 11.3 181 Kirwin 9550 19.1 8.5 225 21.5 10.1 213 Little Warm 9370 15.6 9.4 166 21.4 11.3 189 Owl Creek 8975 6.7 4.6 146 9.1 5.1 178 South Pass 9040 25.5 14.2 180 23.8 15.5 154 St. Lawrence Alt 8620 5.3 6.3 84 12.0 7.6 158 Togwotee Pass 9580 31.0 20.8 149 35.6 21.9 163 Townsend Creek 8700 11.7 8.4 139 16.0 10.2 157 ----- ----- Basin Index (%) 168 174 BIGHORN BASIN Bald Mtn. 9380 17.2 16.6 104 14.9 15.0 99 Bear Trap Meadow 8200 4.2 5.2 81 6.2 7.2 86 Bone Springs Div 9350 16.0 14.2 113 15.3 13.6 112 Grave Springs 8550 5.8 8.3 70 6.1 9.1 67 Kirwin 9550 19.1 8.5 225 21.5 10.1 213 Marquette 8760 7.1 -M * 11.7 -M * Middle Powder 7760 5.9 10.1 58 6.2 10.2 61 Owl Creek 8975 6.7 4.6 146 9.1 5.1 178 Powder River Pass 9480 6.8 9.3 73 10.6 11.0 96 Shell Creek 9580 14.9 13.0 115 11.9 12.0 99 Timber Creek 7950 4.3 4.1 105 7.0 6.2 113 ----- ----- Basin Index (%) 107 109 SHOSHONE RIVER Blackwater 9780 35.8 21.0 170 39.7 18.3 217 Evening Star 9200 36.6 22.5 163 42.7 24.7 173 Marquette 8760 7.1 -M * 11.7 -M * Sylvan Road 7120 12.9 10.5 123 29.4 15.3 192 Younts Peak 8350 25.7 13.6 189 29.8 14.3 208 ----- ----- Basin Index (%) 164 195 POWDER RIVER Bear Trap Meadow 8200 4.2 5.2 81 6.2 7.2 86 Cloud Peak Reservoir 9860 12.0 13.1 92 13.1 11.4 115 Grave Springs 8550 5.8 8.3 70 6.1 9.1 67 Hansen Sawmill 8360 7.4 5.8 128 9.6 7.3 132 Middle Powder 7760 5.9 10.1 58 6.2 10.2 61 Powder River Pass 9480 6.8 9.3 73 10.6 11.0 96 Soldier Park 8720 11.2 -M * 9.5 -M * ----- ----- Basin Index (%) 81 92 TONGUE RIVER Big Goose 7990 8.2 8.0 102 9.6 9.4 102 Bone Springs Div 9350 16.0 14.2 113 15.3 13.6 112 Burgess Junction 7880 8.1 9.7 84 9.1 10.6 86 Dome Lake 8880 12.5 10.4 120 12.4 11.7 106 Little Goose 8870 8.9 -M * 12.0 -M * Sucker Creek 8880 9.7 11.0 88 9.9 12.4 80 Tie Creek 6870 2.8 5.1 55 10.0 9.9 101 ----- ----- Basin Index (%) 98 98 BELLE FOURCHE Cole Canyon 5910 1.5 5.6 27 6.5 8.0 81 ----- ----- Basin Index (%) 27 81 CHEYENNE RIVER BASIN Blind Park 6890 2.4 7.2 33 7.9 10.6 75 North Rapid Creek 6130 3.5 6.6 53 6.7 8.7 77 ----- ----- Basin Index (%) 43 76 UPPER N. PLATTE Arapaho Ridge 10960 23.1 18.1 128 23.6 19.8 119 Blackhall Mtn 9820 34.2 -M * 35.2 -M * Columbine 9160 21.4 22.1 97 26.1 23.2 112 Divide Peak 8880 16.1 17.9 90 20.9 19.3 108 Joe Wright 10120 16.9 19.3 88 25.7 23.1 111 Laprele Creek 8375 10.4 9.3 112 10.6 10.9 97 Med Bow 10500 37.3 -M * 32.5 -M * North French Creek 10130 23.3 25.8 90 25.2 23.9 105 Never Summer 10280 20.9 18.0 116 17.2 -M * Old Battle 10000 35.4 26.8 132 36.4 31.8 114 Rawah 9020 9.6 9.7 99 15.2 12.4 123 Sage Creek Basin 7850 9.7 11.5 84 15.2 13.0 117 Sand Lake 10050 28.5 25.1 114 25.5 21.9 116 South Brush Creek 8440 7.3 11.2 65 11.7 13.5 87 Tower 10500 38.9 40.5 96 41.8 36.1 116 Webber Springs 9250 25.5 21.3 120 31.6 24.1 131 Willow Creek Pass 9540 16.2 11.0 147 17.1 11.8 145 Zirkel 9340 36.1 25.6 141 40.3 25.6 157 ----- ----- Basin Index (%) 108 118 SWEETWATER Deer Park 9700 27.0 13.7 197 32.2 17.4 185 Larsen Creek 9000 16.0 11.3 142 21.0 -M * South Pass 9040 25.5 14.2 180 23.8 15.5 154 ----- ----- Basin Index (%) 175 170 LOWER N. PLATTE Casper Mtn. 7900 9.6 12.5 77 10.4 12.9 81 Laprele Creek 8375 10.4 9.3 112 10.6 10.9 97 Reno Hill 8400 10.5 12.2 86 11.8 13.2 89 Windy Peak 7900 8.4 7.3 115 10.1 9.2 110 ----- ----- Basin Index (%) 94 93 LARAMIE RIVER Brooklyn Lake 10240 24.0 17.9 134 21.8 18.7 117 Cinnabar Park 9574 16.9 18.4 92 20.8 21.5 97 Crow Creek 8330 2.5 6.9 36 8.1 9.1 89 Deadman Hill 10220 19.4 14.1 138 18.2 15.2 120 Rawah 9020 9.6 9.7 99 15.2 12.4 123 Roach 9700 15.0 14.2 106 18.4 17.1 108 ----- ----- Basin Index (%) 108 109 S. PLATTE Black Mountain 8920 9.2 -M * 10.5 -M * Crow Creek 8330 2.5 6.9 36 8.1 9.1 89 Deadman Hill 10220 19.4 14.1 138 18.2 15.2 120 ----- ----- Basin Index (%) 104 108 LITTLE SNAKE RIVER Battle Mountain 7440 5.4 11.3 48 15.7 13.7 115 Divide Peak 8880 16.1 17.9 90 20.9 19.3 108 Elk River 8700 15.2 17.4 87 19.1 18.1 106 Little Snake River 8915 27.1 21.3 127 36.8 26.7 138 Old Battle 10000 35.4 26.8 132 36.4 31.8 114 Sage Creek Basin 7850 9.7 11.5 84 15.2 13.0 117 Sandstone RS 8150 10.2 12.6 81 15.2 16.8 90 Whiskey Park 8950 25.3 24.5 103 28.3 25.2 112 ----- ----- Basin Index (%) 101 114 UPPER GREEN RIVER Big Sandy Opening 9080 19.3 11.8 164 21.6 11.9 182 Blind Bull Sum 8650 40.9 20.7 198 -M 17.8 * East Rim Divide 7930 17.3 9.6 180 19.9 10.6 188 Elkhart Park G.S. 9400 17.5 10.9 161 22.2 11.9 187 Gros Ventre Summit 8750 -M 11.8 * -M 11.5 * Gunsight Pass 9820 19.8 12.2 162 22.4 12.2 184 Kendall R.S. 7740 21.3 11.4 187 27.6 13.0 212 Loomis Park 8240 25.7 13.6 189 30.6 15.7 195 New Fork Lake 8340 15.8 9.4 168 16.8 9.8 171 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.1 11.1 163 25.5 12.9 198 Spring Creek Divide 9000 36.9 21.5 172 37.2 21.6 172 Triple Peak 8500 34.4 19.8 174 37.7 23.0 164 ----- ----- Basin Index (%) 176 183 LOWER GREEN RIVER Blacks Fork Jct 8869 8.1 -M * 13.6 -M * Buck Pasture 9632 15.8 -M * 20.7 -M * EF Blacks Fork GS 9360 13.1 -M * 14.2 -M * Hams Fork 7840 13.6 10.4 131 18.7 10.3 182 Hewinta 9500 6.5 9.9 66 14.1 12.5 113 Hickerson Park 9122 5.8 6.7 87 8.4 9.0 93 Hole-in-Rock 9168 4.2 6.8 62 9.2 8.4 110 Indian Creek 9425 37.1 21.6 172 -M 20.4 * Kelley R.S. 8180 23.9 13.7 174 28.4 16.4 173 Spirit Lk 10235 11.8 -M * 14.7 -M * Steel Creek Park 10158 15.1 13.6 111 17.2 14.5 119 ----- ----- Basin Index (%) 128 135 UPPER BEAR RIVER Bear River RS 8777 7.9 -M * 15.5 -M * Bug Lake 7987 29.3 16.9 173 30.1 17.6 171 Burts Miller Ranch 8000 3.0 -M * 8.4 -M * Chalk Creek #1 9171 30.3 21.6 140 32.1 22.4 143 Hayden Fork 9130 17.3 14.4 120 26.7 18.8 142 Kelley R.S. 8180 23.9 13.7 174 28.4 16.4 173 Lily Lake 9133 10.9 11.5 95 16.9 15.2 111 Monte Cristo 8932 32.1 24.7 130 34.7 23.4 148 Salt River Summit 7760 19.2 12.1 159 26.9 15.1 178 ----- ----- Basin Index (%) 142 152 ----------------------------------------------------------------------------- -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.