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 THURSDAY: MARCH 30 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 23.9 14.7 163 38.1 20.0 190 Black Bear 8170 44.0 35.7 123 51.5 36.3 142 Blind Bull Sum 8650 42.0 22.0 191 -M 18.6 * Cottonwood Creek 7670 26.4 21.0 126 36.0 23.4 154 East Rim Divide 7930 17.2 9.9 174 20.6 11.2 184 Grand Targhee 9260 43.0 35.7 120 38.6 28.8 134 Granite Creek 6770 27.8 15.0 185 35.0 18.9 185 Grassy Lake 7265 35.4 31.5 112 52.1 34.3 152 Gros Ventre Summit 8750 -M 12.7 * -M 12.2 * Gunsight Pass 9820 20.9 13.2 158 23.2 13.0 178 Lewis Lake Divide 7850 42.9 29.4 146 53.1 33.8 157 Phillips Bench 8200 36.0 23.9 151 45.1 26.8 168 Salt River Summit 7760 19.6 12.7 154 -M 15.8 * Snake River Station 6920 18.8 15.8 119 34.3 21.5 160 Spring Creek Divide 9000 38.8 22.4 173 38.6 22.7 170 Thumb Divide 7980 22.8 15.0 152 26.9 17.6 153 Togwotee Pass 9580 31.8 21.5 148 36.5 23.0 159 Two Ocean Plateau 9240 -M 25.4 * -M 25.9 * Willow Creek 8380 28.4 27.3 104 46.8 31.8 147 Younts Peak 8350 25.1 14.0 179 30.2 15.0 201 ----- ----- Basin Index (%) 143 160 MADISON-GALLATIN Black Bear 8170 44.0 35.7 123 51.5 36.3 142 Canyon 7870 17.1 12.3 139 24.6 15.4 160 Madison Plateau 7750 26.1 21.2 123 34.7 25.0 139 West Yellowstone 6700 8.6 10.2 84 22.2 13.4 166 Whiskey Creek 6800 13.6 14.9 91 25.7 19.2 134 ----- ----- Basin Index (%) 116 145 YELLOWSTONE Beartooth Lake 9360 31.3 20.8 150 26.6 18.6 143 Burnt Mtn 5880 .0 4.4 0 12.7 11.8 108 Canyon 7870 17.1 12.3 139 24.6 15.4 160 Cole Creek 7850 10.0 13.2 76 7.1 11.8 60 Evening Star 9200 37.2 23.9 156 43.2 25.8 167 Fisher Creek 9100 42.5 29.7 143 45.4 30.2 150 Northeast Entrance 7350 9.5 9.7 98 19.8 11.6 171 Parker Peak 9400 32.6 18.6 175 32.8 16.7 196 Sylvan Lake 8420 22.7 19.0 119 35.7 21.1 169 Thumb Divide 7980 22.8 15.0 152 26.9 17.6 153 Two Ocean Plateau 9240 -M 25.4 * -M 25.9 * White Mill 8700 34.5 21.4 161 34.8 22.5 155 Wolverine 7650 7.5 9.0 83 20.3 11.5 177 ----- ----- Basin Index (%) 136 154 WIND RIVER Burroughs Creek 8750 23.0 -M * 26.4 -M * Castle Creek 8400 10.6 -M * 14.7 -M * Cold Springs 9630 13.5 7.1 190 16.2 9.4 172 Deer Park 9700 29.4 14.5 203 34.5 18.5 186 Hobbs Park 10100 24.8 13.1 189 23.4 12.3 190 Kirwin 9550 20.4 9.2 222 22.8 10.9 209 Little Warm 9370 16.7 10.1 165 22.4 12.1 185 Owl Creek 8975 7.7 5.2 148 10.2 5.6 182 South Pass 9040 28.0 14.7 190 25.2 16.4 154 St. Lawrence Alt 8620 6.5 6.7 97 13.7 8.3 165 Togwotee Pass 9580 31.8 21.5 148 36.5 23.0 159 Townsend Creek 8700 14.1 8.8 160 18.3 11.1 165 ----- ----- Basin Index (%) 174 175 BIGHORN BASIN Bald Mtn. 9380 18.2 18.1 101 15.8 16.0 99 Bear Trap Meadow 8200 4.3 5.1 84 7.4 7.9 94 Bone Springs Div 9350 18.0 15.4 117 16.8 14.6 115 Grave Springs 8550 6.3 8.7 72 6.9 9.8 70 Kirwin 9550 20.4 9.2 222 22.8 10.9 209 Marquette 8760 8.9 -M * 13.4 -M * Middle Powder 7760 6.8 11.0 62 6.9 10.9 63 Owl Creek 8975 7.7 5.2 148 10.2 5.6 182 Powder River Pass 9480 7.9 9.9 80 11.7 11.8 99 Shell Creek 9580 16.3 14.2 115 13.4 13.0 103 Timber Creek 7950 5.3 4.6 115 8.5 6.9 123 ----- ----- Basin Index (%) 110 112 SHOSHONE RIVER Blackwater 9780 36.4 21.8 167 40.3 19.4 208 Evening Star 9200 37.2 23.9 156 43.2 25.8 167 Marquette 8760 8.9 -M * 13.4 -M * Sylvan Road 7120 9.6 11.1 86 29.7 16.0 186 Younts Peak 8350 25.1 14.0 179 30.2 15.0 201 ----- ----- Basin Index (%) 153 188 POWDER RIVER Bear Trap Meadow 8200 4.3 5.1 84 7.4 7.9 94 Cloud Peak Reservoir 9860 14.1 13.9 101 15.7 12.4 127 Grave Springs 8550 6.3 8.7 72 6.9 9.8 70 Hansen Sawmill 8360 9.5 6.3 151 11.9 8.0 149 Middle Powder 7760 6.8 11.0 62 6.9 10.9 63 Powder River Pass 9480 7.9 9.9 80 11.7 11.8 99 Soldier Park 8720 13.2 -M * 11.9 -M * ----- ----- Basin Index (%) 89 100 TONGUE RIVER Big Goose 7990 10.1 8.6 117 11.9 10.4 114 Bone Springs Div 9350 18.0 15.4 117 16.8 14.6 115 Burgess Junction 7880 9.5 11.1 86 10.7 11.5 93 Dome Lake 8880 14.6 11.4 128 14.6 12.7 115 Little Goose 8870 11.2 -M * 14.4 -M * Sucker Creek 8880 11.4 11.3 101 11.6 13.4 87 Tie Creek 6870 3.0 5.4 56 11.5 10.7 107 ----- ----- Basin Index (%) 105 105 BELLE FOURCHE Cole Canyon 5910 .0 5.8 0 6.9 8.5 81 ----- ----- Basin Index (%) 0 81 CHEYENNE RIVER BASIN Blind Park 6890 .0 7.2 0 8.3 11.1 75 North Rapid Creek 6130 1.1 6.7 16 6.9 9.1 76 ----- ----- Basin Index (%) 8 75 UPPER N. PLATTE Arapaho Ridge 10960 24.1 19.4 124 25.0 21.0 119 Blackhall Mtn 9820 35.4 -M * 36.4 -M * Columbine 9160 19.6 22.4 88 26.4 24.1 110 Divide Peak 8880 15.5 19.3 80 21.5 20.2 106 Joe Wright 10120 17.8 20.0 89 27.0 24.3 111 Laprele Creek 8375 10.5 9.4 112 11.2 11.6 97 Med Bow 10500 36.8 -M * 33.6 -M * North French Creek 10130 23.5 27.5 85 26.1 25.3 103 Never Summer 10280 21.1 19.2 110 18.1 -M * Old Battle 10000 35.6 28.9 123 37.0 33.1 112 Rawah 9020 9.5 10.2 93 16.1 13.3 121 Sage Creek Basin 7850 7.6 12.6 60 15.5 13.6 114 Sand Lake 10050 29.7 27.0 110 26.6 23.2 115 South Brush Creek 8440 5.6 12.2 46 11.9 14.4 83 Tower 10500 39.5 43.2 91 42.2 37.7 112 Webber Springs 9250 25.8 22.7 114 32.3 25.3 128 Willow Creek Pass 9540 17.0 11.6 147 17.8 12.6 141 Zirkel 9340 33.3 26.3 127 40.9 26.9 152 ----- ----- Basin Index (%) 101 116 SWEETWATER Deer Park 9700 29.4 14.5 203 34.5 18.5 186 Larsen Creek 9000 16.7 12.0 139 22.2 -M * South Pass 9040 28.0 14.7 190 25.2 16.4 154 ----- ----- Basin Index (%) 180 171 LOWER N. PLATTE Casper Mtn. 7900 9.7 13.0 75 11.0 13.8 80 Laprele Creek 8375 10.5 9.4 112 11.2 11.6 97 Reno Hill 8400 11.4 12.8 89 12.8 14.3 90 Windy Peak 7900 8.3 7.8 106 10.8 9.8 110 ----- ----- Basin Index (%) 93 93 LARAMIE RIVER Brooklyn Lake 10240 22.6 19.4 116 22.2 19.8 112 Cinnabar Park 9574 17.3 19.7 88 21.4 22.8 94 Crow Creek 8330 .5 6.8 7 8.8 10.0 88 Deadman Hill 10220 20.3 15.2 134 19.5 16.2 120 Rawah 9020 9.5 10.2 93 16.1 13.3 121 Roach 9700 16.3 15.2 107 20.2 18.0 112 ----- ----- Basin Index (%) 100 108 S. PLATTE Black Mountain 8920 10.5 -M * 12.1 -M * Crow Creek 8330 .5 6.8 7 8.8 10.0 88 Deadman Hill 10220 20.3 15.2 134 19.5 16.2 120 ----- ----- Basin Index (%) 95 108 LITTLE SNAKE RIVER Battle Mountain 7440 -M 10.8 * 16.0 14.3 112 Divide Peak 8880 15.5 19.3 80 21.5 20.2 106 Elk River 8700 13.0 18.1 72 19.4 19.0 102 Little Snake River 8915 26.5 22.6 117 37.5 27.9 134 Old Battle 10000 35.6 28.9 123 37.0 33.1 112 Sage Creek Basin 7850 7.6 12.6 60 15.5 13.6 114 Sandstone RS 8150 7.6 13.1 58 15.8 17.5 90 Whiskey Park 8950 25.4 25.2 101 28.9 26.5 109 ----- ----- Basin Index (%) 94 111 UPPER GREEN RIVER Big Sandy Opening 9080 20.5 12.2 168 22.7 12.5 182 Blind Bull Sum 8650 42.0 22.0 191 -M 18.6 * East Rim Divide 7930 17.2 9.9 174 20.6 11.2 184 Elkhart Park G.S. 9400 18.7 11.8 158 23.6 12.6 187 Gros Ventre Summit 8750 -M 12.7 * -M 12.2 * Gunsight Pass 9820 20.9 13.2 158 23.2 13.0 178 Kendall R.S. 7740 20.5 11.4 180 28.3 13.6 208 Loomis Park 8240 26.5 14.4 184 31.4 16.5 190 New Fork Lake 8340 15.7 10.2 154 17.3 10.3 168 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.1 12.0 151 26.2 13.5 194 Spring Creek Divide 9000 38.8 22.4 173 38.6 22.7 170 Triple Peak 8500 35.1 21.3 165 39.2 24.1 163 ----- ----- Basin Index (%) 170 181 LOWER GREEN RIVER Blacks Fork Jct 8869 8.6 -M * 15.1 -M * Buck Pasture 9632 17.0 -M * 22.5 -M * EF Blacks Fork GS 9360 14.6 -M * 16.1 -M * Hams Fork 7840 13.2 10.7 123 19.8 10.8 183 Hewinta 9500 7.9 10.6 75 16.2 13.2 123 Hickerson Park 9122 8.4 7.3 115 11.7 9.5 123 Hole-in-Rock 9168 6.5 7.0 93 12.3 9.0 137 Indian Creek 9425 39.0 23.5 166 -M 21.4 * Kelley R.S. 8180 24.5 14.7 167 29.4 17.3 170 Spirit Lk 10235 15.1 -M * 17.4 -M * Steel Creek Park 10158 17.5 14.8 118 19.6 15.4 127 ----- ----- Basin Index (%) 132 145 UPPER BEAR RIVER Bear River RS 8777 9.3 -M * 17.7 -M * Bug Lake 7987 30.3 18.0 168 32.1 18.4 174 Burts Miller Ranch 8000 2.9 -M * 9.4 -M * Chalk Creek #1 9171 32.2 23.0 140 34.6 23.8 145 Hayden Fork 9130 19.4 14.9 130 28.6 19.9 144 Kelley R.S. 8180 24.5 14.7 167 29.4 17.3 170 Lily Lake 9133 13.3 11.9 112 19.2 16.1 119 Monte Cristo 8932 33.9 25.8 131 37.0 24.6 150 Salt River Summit 7760 19.6 12.7 154 -M 15.8 * ----- ----- 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.