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 27 , 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 37.9 19.7 192 Black Bear 8170 42.5 34.6 123 50.5 35.6 142 Blind Bull Sum 8650 41.9 21.3 197 -M 18.3 * Cottonwood Creek 7670 26.4 20.6 128 35.8 23.0 156 East Rim Divide 7930 17.6 9.8 180 20.5 11.0 186 Grand Targhee 9260 41.9 34.6 121 38.0 28.3 134 Granite Creek 6770 28.2 14.8 191 34.9 18.7 187 Grassy Lake 7265 34.5 30.8 112 51.5 33.9 152 Gros Ventre Summit 8750 -M 12.2 * -M 11.9 * Gunsight Pass 9820 20.8 12.9 161 23.1 12.7 182 Lewis Lake Divide 7850 41.5 29.0 143 52.6 33.2 158 Phillips Bench 8200 35.4 23.4 151 44.8 26.4 170 Salt River Summit 7760 19.7 12.5 158 -M 15.6 * Snake River Station 6920 18.9 15.8 120 33.9 21.1 161 Spring Creek Divide 9000 -M 22.2 * -M 22.3 * Thumb Divide 7980 22.8 15.1 151 26.7 17.2 155 Togwotee Pass 9580 31.9 21.3 150 36.4 22.6 161 Two Ocean Plateau 9240 -M 25.0 * -M 25.4 * Willow Creek 8380 28.5 26.2 109 46.7 31.2 150 Younts Peak 8350 25.1 13.8 182 30.1 14.7 205 ----- ----- Basin Index (%) 143 161 MADISON-GALLATIN Black Bear 8170 42.5 34.6 123 50.5 35.6 142 Canyon 7870 16.9 12.1 140 24.4 15.0 163 Madison Plateau 7750 25.5 20.8 123 34.3 24.5 140 West Yellowstone 6700 9.0 10.1 89 22.0 13.1 168 Whiskey Creek 6800 13.4 14.6 92 25.3 18.8 135 ----- ----- Basin Index (%) 116 146 YELLOWSTONE Beartooth Lake 9360 30.9 20.4 151 26.4 18.4 143 Burnt Mtn 5880 1.4 4.7 30 12.6 11.4 111 Canyon 7870 16.9 12.1 140 24.4 15.0 163 Cole Creek 7850 9.7 12.8 76 6.8 11.4 60 Evening Star 9200 36.9 23.5 157 43.0 25.4 169 Fisher Creek 9100 41.7 28.9 144 44.8 29.6 151 Northeast Entrance 7350 9.4 9.7 97 19.4 11.4 170 Parker Peak 9400 31.9 18.3 174 32.4 16.3 199 Sylvan Lake 8420 22.4 18.8 119 35.5 20.7 171 Thumb Divide 7980 22.8 15.1 151 26.7 17.2 155 Two Ocean Plateau 9240 -M 25.0 * -M 25.4 * White Mill 8700 33.6 21.1 159 34.1 22.0 155 Wolverine 7650 7.9 8.9 89 20.1 11.3 178 ----- ----- Basin Index (%) 137 155 WIND RIVER Burroughs Creek 8750 23.3 -M * 26.2 -M * Castle Creek 8400 10.9 -M * 14.4 -M * Cold Springs 9630 13.0 6.9 188 15.7 9.0 174 Deer Park 9700 29.0 14.2 204 34.0 17.9 190 Hobbs Park 10100 23.7 12.8 185 22.3 11.8 189 Kirwin 9550 19.7 8.9 221 22.1 10.5 210 Little Warm 9370 16.5 9.9 167 22.2 11.8 188 Owl Creek 8975 7.3 4.8 152 9.8 5.4 181 South Pass 9040 27.3 14.4 190 24.5 16.0 153 St. Lawrence Alt 8620 5.9 6.6 89 13.0 8.0 162 Togwotee Pass 9580 31.9 21.3 150 36.4 22.6 161 Townsend Creek 8700 13.0 8.7 149 17.1 10.6 161 ----- ----- Basin Index (%) 173 176 BIGHORN BASIN Bald Mtn. 9380 18.1 17.3 105 15.6 15.5 101 Bear Trap Meadow 8200 4.3 5.1 84 7.0 7.6 92 Bone Springs Div 9350 17.3 14.7 118 16.2 14.1 115 Grave Springs 8550 6.2 8.4 74 6.7 9.4 71 Kirwin 9550 19.7 8.9 221 22.1 10.5 210 Marquette 8760 8.0 -M * 12.6 -M * Middle Powder 7760 6.4 10.6 60 6.3 10.6 59 Owl Creek 8975 7.3 4.8 152 9.8 5.4 181 Powder River Pass 9480 7.5 9.6 78 11.1 11.4 97 Shell Creek 9580 15.9 13.7 116 13.0 12.5 104 Timber Creek 7950 4.9 4.3 114 8.1 6.5 125 ----- ----- Basin Index (%) 110 112 SHOSHONE RIVER Blackwater 9780 36.1 21.4 169 40.0 18.9 212 Evening Star 9200 36.9 23.5 157 43.0 25.4 169 Marquette 8760 8.0 -M * 12.6 -M * Sylvan Road 7120 10.8 10.9 99 29.5 15.7 188 Younts Peak 8350 25.1 13.8 182 30.1 14.7 205 ----- ----- Basin Index (%) 156 191 POWDER RIVER Bear Trap Meadow 8200 4.3 5.1 84 7.0 7.6 92 Cloud Peak Reservoir 9860 13.0 13.5 96 14.4 11.9 121 Grave Springs 8550 6.2 8.4 74 6.7 9.4 71 Hansen Sawmill 8360 8.2 6.1 134 10.7 7.7 139 Middle Powder 7760 6.4 10.6 60 6.3 10.6 59 Powder River Pass 9480 7.5 9.6 78 11.1 11.4 97 Soldier Park 8720 12.0 -M * 10.7 -M * ----- ----- Basin Index (%) 86 96 TONGUE RIVER Big Goose 7990 9.5 8.3 114 11.2 9.8 114 Bone Springs Div 9350 17.3 14.7 118 16.2 14.1 115 Burgess Junction 7880 9.3 10.5 89 10.3 11.1 93 Dome Lake 8880 13.8 11.0 125 13.9 12.2 114 Little Goose 8870 10.5 -M * 13.7 -M * Sucker Creek 8880 11.0 11.1 99 11.1 12.9 86 Tie Creek 6870 3.0 5.3 57 11.2 10.2 110 ----- ----- Basin Index (%) 105 105 BELLE FOURCHE Cole Canyon 5910 .0 5.7 0 6.7 8.3 81 ----- ----- Basin Index (%) 0 81 CHEYENNE RIVER BASIN Blind Park 6890 .2 7.1 3 8.2 10.8 76 North Rapid Creek 6130 1.9 6.7 28 6.8 8.9 76 ----- ----- Basin Index (%) 15 76 UPPER N. PLATTE Arapaho Ridge 10960 23.3 18.9 123 24.0 20.5 117 Blackhall Mtn 9820 34.4 -M * 35.7 -M * Columbine 9160 19.7 22.0 90 26.0 23.8 109 Divide Peak 8880 15.0 18.8 80 21.0 19.8 106 Joe Wright 10120 17.1 19.7 87 26.4 23.8 111 Laprele Creek 8375 10.0 9.4 106 10.8 11.4 95 Med Bow 10500 36.8 -M * 33.1 -M * North French Creek 10130 23.2 27.0 86 25.7 24.8 104 Never Summer 10280 21.1 18.7 113 17.9 -M * Old Battle 10000 35.4 28.1 126 36.5 32.5 112 Rawah 9020 9.2 10.0 92 15.8 12.9 122 Sage Creek Basin 7850 7.9 12.2 65 15.3 13.4 114 Sand Lake 10050 28.8 26.1 110 25.8 22.7 114 South Brush Creek 8440 5.9 11.8 50 11.6 14.0 83 Tower 10500 39.1 41.9 93 41.8 37.1 113 Webber Springs 9250 25.5 22.3 114 31.7 24.8 128 Willow Creek Pass 9540 16.6 11.4 146 17.4 12.2 143 Zirkel 9340 33.8 25.9 131 40.3 26.5 152 ----- ----- Basin Index (%) 102 116 SWEETWATER Deer Park 9700 29.0 14.2 204 34.0 17.9 190 Larsen Creek 9000 16.7 11.8 142 21.9 -M * South Pass 9040 27.3 14.4 190 24.5 16.0 153 ----- ----- Basin Index (%) 181 173 LOWER N. PLATTE Casper Mtn. 7900 9.2 12.8 72 10.5 13.4 78 Laprele Creek 8375 10.0 9.4 106 10.8 11.4 95 Reno Hill 8400 10.9 12.6 87 12.3 13.8 89 Windy Peak 7900 8.0 7.7 104 10.4 9.6 108 ----- ----- Basin Index (%) 90 91 LARAMIE RIVER Brooklyn Lake 10240 22.7 18.7 121 21.7 19.3 112 Cinnabar Park 9574 17.0 19.5 87 21.0 22.4 94 Crow Creek 8330 .3 6.9 4 8.3 9.7 86 Deadman Hill 10220 19.8 14.8 134 18.8 15.8 119 Rawah 9020 9.2 10.0 92 15.8 12.9 122 Roach 9700 15.1 14.7 103 19.0 17.6 108 ----- ----- Basin Index (%) 99 107 S. PLATTE Black Mountain 8920 9.4 -M * 11.1 -M * Crow Creek 8330 .3 6.9 4 8.3 9.7 86 Deadman Hill 10220 19.8 14.8 134 18.8 15.8 119 ----- ----- Basin Index (%) 93 106 LITTLE SNAKE RIVER Battle Mountain 7440 3.6 11.0 33 15.8 14.0 113 Divide Peak 8880 15.0 18.8 80 21.0 19.8 106 Elk River 8700 13.6 17.8 76 19.2 18.6 103 Little Snake River 8915 26.1 21.9 119 37.1 27.5 135 Old Battle 10000 35.4 28.1 126 36.5 32.5 112 Sage Creek Basin 7850 7.9 12.2 65 15.3 13.4 114 Sandstone RS 8150 8.3 13.0 64 15.5 17.2 90 Whiskey Park 8950 25.1 24.8 101 28.7 26.0 110 ----- ----- Basin Index (%) 91 112 UPPER GREEN RIVER Big Sandy Opening 9080 20.2 12.0 168 22.6 12.3 184 Blind Bull Sum 8650 41.9 21.3 197 -M 18.3 * East Rim Divide 7930 17.6 9.8 180 20.5 11.0 186 Elkhart Park G.S. 9400 18.7 11.5 163 23.5 12.3 191 Gros Ventre Summit 8750 -M 12.2 * -M 11.9 * Gunsight Pass 9820 20.8 12.9 161 23.1 12.7 182 Kendall R.S. 7740 21.1 11.3 187 28.3 13.5 210 Loomis Park 8240 26.7 14.3 187 31.5 16.2 194 New Fork Lake 8340 16.3 9.9 165 17.2 10.1 170 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 18.3 11.5 159 26.1 13.2 198 Spring Creek Divide 9000 -M 22.2 * -M 22.3 * Triple Peak 8500 35.1 20.7 170 39.0 23.7 165 ----- ----- Basin Index (%) 175 185 LOWER GREEN RIVER Blacks Fork Jct 8869 7.8 -M * 14.1 -M * Buck Pasture 9632 16.3 -M * 21.6 -M * EF Blacks Fork GS 9360 13.7 -M * 15.2 -M * Hams Fork 7840 13.6 10.6 128 19.6 10.6 185 Hewinta 9500 6.7 10.0 67 14.9 12.9 116 Hickerson Park 9122 6.3 7.0 90 9.7 9.3 104 Hole-in-Rock 9168 4.6 6.9 67 10.2 8.7 117 Indian Creek 9425 38.6 22.7 170 -M 21.0 * Kelley R.S. 8180 24.5 14.4 170 29.3 17.0 172 Spirit Lk 10235 14.0 -M * 16.4 -M * Steel Creek Park 10158 16.3 14.2 115 18.5 15.0 123 ----- ----- Basin Index (%) 129 139 UPPER BEAR RIVER Bear River RS 8777 7.9 -M * 16.2 -M * Bug Lake 7987 30.1 17.6 171 31.8 18.1 176 Burts Miller Ranch 8000 1.9 -M * 8.5 -M * Chalk Creek #1 9171 30.3 22.4 135 32.9 23.2 142 Hayden Fork 9130 18.0 14.6 123 27.6 19.4 142 Kelley R.S. 8180 24.5 14.4 170 29.3 17.0 172 Lily Lake 9133 11.8 11.8 100 17.8 15.7 113 Monte Cristo 8932 33.7 25.3 133 36.6 24.2 151 Salt River Summit 7760 19.7 12.5 158 -M 15.6 * ----- ----- Basin Index (%) 142 150 ----------------------------------------------------------------------------- -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.