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 SUNDAY: MARCH 19 , 2017 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7030 25.6 14.7 174 36.8 18.9 195 Black Bear 8170 43.0 32.4 133 48.7 34.3 142 Blind Bull Sum 8650 40.5 20.4 199 -M 17.6 * Cottonwood Creek 7670 26.0 19.7 132 34.4 21.8 158 East Rim Divide 7930 18.2 9.5 192 19.8 10.5 189 Grand Targhee 9260 40.0 32.9 122 36.8 26.9 137 Granite Creek 6770 29.6 15.0 197 34.3 18.1 190 Grassy Lake 7265 36.4 29.3 124 49.7 32.5 153 Gros Ventre Summit 8750 -M 11.6 * -M 11.4 * Gunsight Pass 9820 19.6 12.0 163 22.1 12.0 184 Lewis Lake Divide 7850 38.5 27.6 139 50.3 31.9 158 Phillips Bench 8200 35.3 22.3 158 43.9 25.2 174 Salt River Summit 7760 20.1 12.0 168 26.8 14.9 180 Snake River Station 6920 19.9 15.1 132 32.7 20.3 161 Spring Creek Divide 9000 36.7 20.9 176 37.1 21.3 174 Thumb Divide 7980 20.9 14.0 149 25.5 16.4 155 Togwotee Pass 9580 30.4 20.5 148 35.0 21.7 161 Two Ocean Plateau 9240 -M 23.9 * -M 24.2 * Willow Creek 8380 30.0 25.4 118 45.1 29.8 151 Younts Peak 8350 27.0 13.4 201 29.2 14.0 209 ----- ----- Basin Index (%) 151 164 MADISON-GALLATIN Black Bear 8170 43.0 32.4 133 48.7 34.3 142 Canyon 7870 16.7 11.7 143 23.7 14.5 163 Madison Plateau 7750 25.6 20.0 128 32.6 23.5 139 West Yellowstone 6700 11.0 9.9 111 21.2 12.7 167 Whiskey Creek 6800 14.7 14.1 104 24.2 18.0 134 ----- ----- Basin Index (%) 126 146 YELLOWSTONE Beartooth Lake 9360 29.8 19.1 156 25.4 17.6 144 Burnt Mtn 5880 3.6 4.5 80 12.0 10.8 111 Canyon 7870 16.7 11.7 143 23.7 14.5 163 Cole Creek 7850 9.3 11.9 78 6.7 10.6 63 Evening Star 9200 35.4 22.0 161 41.6 24.3 171 Fisher Creek 9100 39.7 28.2 141 42.9 28.4 151 Northeast Entrance 7350 10.8 9.0 120 18.6 10.9 171 Parker Peak 9400 30.7 17.5 175 -M 15.6 * Sylvan Lake 8420 -M 18.0 * 34.0 19.8 172 Thumb Divide 7980 20.9 14.0 149 25.5 16.4 155 Two Ocean Plateau 9240 -M 23.9 * -M 24.2 * White Mill 8700 31.7 19.7 161 32.6 21.1 155 Wolverine 7650 12.5 8.9 140 19.7 10.9 181 ----- ----- Basin Index (%) 145 153 WIND RIVER Burroughs Creek 8750 24.5 -M * 25.3 -M * Castle Creek 8400 11.4 -M * 14.3 -M * Cold Springs 9630 11.8 6.3 187 14.9 8.5 175 Deer Park 9700 27.2 13.1 208 32.2 17.0 189 Hobbs Park 10100 22.1 11.6 191 20.4 11.0 185 Kirwin 9550 17.8 8.4 212 21.0 9.9 212 Little Warm 9370 15.6 9.2 170 21.3 11.1 192 Owl Creek 8975 6.7 4.6 146 8.7 4.9 178 South Pass 9040 -M 13.6 * 23.8 15.2 157 St. Lawrence Alt 8620 6.4 6.1 105 12.0 7.4 162 Togwotee Pass 9580 30.4 20.5 148 35.0 21.7 161 Townsend Creek 8700 12.1 8.1 149 15.9 10.0 159 ----- ----- Basin Index (%) 171 176 BIGHORN BASIN Bald Mtn. 9380 16.8 16.4 102 14.7 14.7 100 Bear Trap Meadow 8200 4.9 5.0 98 6.2 7.0 89 Bone Springs Div 9350 15.3 14.0 109 14.6 13.3 110 Grave Springs 8550 5.9 8.1 73 6.1 8.9 69 Kirwin 9550 17.8 8.4 212 21.0 9.9 212 Marquette 8760 7.0 -M * 11.7 -M * Middle Powder 7760 6.2 9.6 65 6.2 9.9 63 Owl Creek 8975 6.7 4.6 146 8.7 4.9 178 Powder River Pass 9480 6.7 9.0 74 10.4 10.7 97 Shell Creek 9580 14.4 12.8 112 11.7 11.8 99 Timber Creek 7950 4.9 4.2 117 6.9 6.1 113 ----- ----- Basin Index (%) 108 110 SHOSHONE RIVER Blackwater 9780 34.6 20.6 168 38.7 18.0 215 Evening Star 9200 35.4 22.0 161 41.6 24.3 171 Marquette 8760 7.0 -M * 11.7 -M * Sylvan Road 7120 14.0 10.4 135 28.4 15.1 188 Younts Peak 8350 27.0 13.4 201 29.2 14.0 209 ----- ----- Basin Index (%) 167 193 POWDER RIVER Bear Trap Meadow 8200 4.9 5.0 98 6.2 7.0 89 Cloud Peak Reservoir 9860 11.7 12.8 91 13.0 11.1 117 Grave Springs 8550 5.9 8.1 73 6.1 8.9 69 Hansen Sawmill 8360 7.2 5.6 129 9.3 7.1 131 Middle Powder 7760 6.2 9.6 65 6.2 9.9 63 Powder River Pass 9480 6.7 9.0 74 10.4 10.7 97 Soldier Park 8720 11.1 -M * 9.2 -M * ----- ----- Basin Index (%) 85 94 TONGUE RIVER Big Goose 7990 8.1 7.7 105 9.3 9.2 101 Bone Springs Div 9350 15.3 14.0 109 14.6 13.3 110 Burgess Junction 7880 7.9 9.5 83 9.1 10.4 88 Dome Lake 8880 12.3 10.1 122 12.0 11.4 105 Little Goose 8870 8.8 -M * 11.6 -M * Sucker Creek 8880 9.5 10.8 88 9.8 12.1 81 Tie Creek 6870 3.5 5.0 70 9.7 9.7 100 ----- ----- Basin Index (%) 99 98 BELLE FOURCHE Cole Canyon 5910 2.2 5.5 40 6.5 7.8 83 ----- ----- Basin Index (%) 40 83 CHEYENNE RIVER BASIN Blind Park 6890 3.2 7.2 44 7.7 10.5 73 North Rapid Creek 6130 4.0 6.5 62 6.5 8.5 76 ----- ----- Basin Index (%) 53 75 UPPER N. PLATTE Arapaho Ridge 10960 24.0 18.0 133 23.6 19.6 120 Blackhall Mtn 9820 34.5 -M * 35.3 -M * Columbine 9160 23.0 21.9 105 25.9 22.7 114 Divide Peak 8880 17.6 17.5 101 21.0 19.0 111 Joe Wright 10120 17.3 19.0 91 25.7 22.7 113 Laprele Creek 8375 10.5 9.1 115 10.5 10.8 97 Med Bow 10500 37.0 -M * 32.5 -M * North French Creek 10130 23.7 24.9 95 25.1 23.5 107 Never Summer 10280 21.2 17.7 120 17.2 -M * Old Battle 10000 35.5 26.2 135 36.3 31.2 116 Rawah 9020 10.7 9.3 115 15.1 12.0 126 Sage Creek Basin 7850 11.5 11.6 99 15.2 12.9 118 Sand Lake 10050 28.2 24.4 116 25.4 21.5 118 South Brush Creek 8440 8.4 11.1 76 11.7 13.2 89 Tower 10500 39.4 39.7 99 41.7 35.5 117 Webber Springs 9250 27.0 21.0 129 31.5 23.7 133 Willow Creek Pass 9540 16.3 10.8 151 17.1 11.6 147 Zirkel 9340 38.6 25.8 150 40.2 25.3 159 ----- ----- Basin Index (%) 115 120 SWEETWATER Deer Park 9700 27.2 13.1 208 32.2 17.0 189 Larsen Creek 9000 17.2 11.1 155 21.0 -M * South Pass 9040 -M 13.6 * 23.8 15.2 157 ----- ----- Basin Index (%) 183 174 LOWER N. PLATTE Casper Mtn. 7900 10.5 12.1 87 10.4 12.6 83 Laprele Creek 8375 10.5 9.1 115 10.5 10.8 97 Reno Hill 8400 10.8 11.9 91 11.9 12.8 93 Windy Peak 7900 9.0 7.0 129 10.0 9.0 111 ----- ----- Basin Index (%) 102 95 LARAMIE RIVER Brooklyn Lake 10240 24.2 17.6 138 21.7 18.3 119 Cinnabar Park 9574 17.7 17.9 99 20.8 21.2 98 Crow Creek 8330 4.0 7.0 57 8.2 8.8 93 Deadman Hill 10220 19.5 13.8 141 18.2 14.9 122 Rawah 9020 10.7 9.3 115 15.1 12.0 126 Roach 9700 15.2 13.9 109 18.4 16.8 110 ----- ----- Basin Index (%) 115 111 S. PLATTE Black Mountain 8920 9.2 -M * 10.5 -M * Crow Creek 8330 4.0 7.0 57 8.2 8.8 93 Deadman Hill 10220 19.5 13.8 141 18.2 14.9 122 ----- ----- Basin Index (%) 113 111 LITTLE SNAKE RIVER Battle Mountain 7440 7.4 11.3 65 15.7 13.4 117 Divide Peak 8880 17.6 17.5 101 21.0 19.0 111 Elk River 8700 17.1 17.3 99 19.1 17.9 107 Little Snake River 8915 28.7 21.0 137 36.8 26.3 140 Old Battle 10000 35.5 26.2 135 36.3 31.2 116 Sage Creek Basin 7850 11.5 11.6 99 15.2 12.9 118 Sandstone RS 8150 11.3 12.0 94 15.2 16.6 92 Whiskey Park 8950 26.1 24.2 108 28.3 24.8 114 ----- ----- Basin Index (%) 110 116 UPPER GREEN RIVER Big Sandy Opening 9080 19.9 11.6 172 21.7 11.7 185 Blind Bull Sum 8650 40.5 20.4 199 -M 17.6 * East Rim Divide 7930 18.2 9.5 192 19.8 10.5 189 Elkhart Park G.S. 9400 17.7 10.6 167 22.1 11.8 187 Gros Ventre Summit 8750 -M 11.6 * -M 11.4 * Gunsight Pass 9820 19.6 12.0 163 22.1 12.0 184 Kendall R.S. 7740 22.4 11.2 200 27.6 12.9 214 Loomis Park 8240 26.4 13.3 198 30.5 15.5 197 New Fork Lake 8340 15.8 9.3 170 16.7 9.7 172 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.6 11.0 169 25.5 12.7 201 Spring Creek Divide 9000 36.7 20.9 176 37.1 21.3 174 Triple Peak 8500 34.9 19.3 181 37.6 22.6 166 ----- ----- Basin Index (%) 182 185 LOWER GREEN RIVER Blacks Fork Jct 8869 9.2 -M * 13.6 -M * Buck Pasture 9632 17.2 -M * 20.6 -M * EF Blacks Fork GS 9360 14.5 -M * -M -M * Hams Fork 7840 15.2 10.2 149 18.5 10.1 183 Hewinta 9500 7.9 9.8 81 14.1 12.2 116 Hickerson Park 9122 6.7 6.6 102 8.5 8.8 97 Hole-in-Rock 9168 5.4 6.6 82 9.2 8.2 112 Indian Creek 9425 37.0 21.2 175 -M 20.0 * Kelley R.S. 8180 24.7 13.3 186 28.4 16.1 176 Spirit Lk 10235 12.7 -M * 14.6 -M * Steel Creek Park 10158 15.4 13.4 115 17.1 14.2 120 ----- ----- Basin Index (%) 138 138 UPPER BEAR RIVER Bear River RS 8777 9.3 -M * 15.4 -M * Bug Lake 7987 29.6 16.6 178 30.0 17.3 173 Burts Miller Ranch 8000 4.7 -M * 8.4 -M * Chalk Creek #1 9171 30.8 21.0 147 32.0 22.0 145 Hayden Fork 9130 19.4 14.2 137 26.7 18.4 145 Kelley R.S. 8180 24.7 13.3 186 28.4 16.1 176 Lily Lake 9133 11.9 11.4 104 16.9 14.9 113 Monte Cristo 8932 33.1 24.2 137 34.6 23.0 150 Salt River Summit 7760 20.1 12.0 168 26.8 14.9 180 ----- ----- Basin Index (%) 150 154 ----------------------------------------------------------------------------- -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.