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: APRIL 11 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 19.0 14.7 129 23.1 21.0 110 Black Bear 8170 42.0 36.7 114 43.0 38.4 112 Blind Bull Sum 8650 36.3 23.5 154 21.5 19.6 110 Cottonwood Creek 7670 23.8 20.7 115 27.8 24.8 112 East Rim Divide 7930 12.9 10.2 126 13.2 11.8 112 Grand Targhee 9260 49.7 39.6 126 30.6 31.2 98 Granite Creek 6770 18.7 13.6 138 23.3 19.7 118 Grassy Lake 7265 33.7 31.4 107 37.4 36.1 104 Gros Ventre Summit 8750 17.4 12.8 136 16.5 13.1 126 Gunsight Pass 9820 18.8 13.8 136 17.8 14.1 126 Lewis Lake Divide 7850 43.4 30.2 144 41.7 35.6 117 Phillips Bench 8200 31.1 25.8 121 30.1 28.3 106 Salt River Summit 7640 10.8 12.3 88 13.8 16.8 82 Snake River Station 6920 18.9 14.2 133 24.9 22.6 110 Spring Creek Divide 9000 28.1 22.7 124 26.2 23.9 110 Thumb Divide 7980 20.7 14.6 142 20.3 18.8 108 Togwotee Pass 9580 34.6 22.6 153 32.8 24.5 134 Two Ocean Plateau 9240 40.2 26.6 151 30.5 27.4 111 Willow Creek 8080 36.9 27.8 133 37.9 33.9 112 Younts Peak 8350 -M 14.5 * -M 15.9 * ----- ----- Basin Index (%) 130 111 MADISON-GALLATIN Black Bear 8170 42.0 36.7 114 43.0 38.4 112 Canyon 7870 17.8 12.3 145 20.3 16.3 125 Madison Plateau 7750 27.6 22.0 125 28.1 26.4 106 West Yellowstone 6700 12.3 8.8 140 17.6 14.2 124 Whiskey Creek 6800 16.4 14.7 112 19.8 20.3 98 ----- ----- Basin Index (%) 123 111 YELLOWSTONE Beartooth Lake 9360 40.9 21.7 188 37.3 19.9 187 Burnt Mtn 5880 8.0 3.0 267 15.4 13.2 117 Canyon 7870 17.8 12.3 145 20.3 16.3 125 Cole Creek 7850 15.6 15.2 103 -M 13.3 * Evening Star 9200 44.4 24.1 184 42.3 27.6 153 Fisher Creek 9100 54.3 31.5 172 48.2 31.8 152 Northeast Entrance 7350 15.3 8.6 178 19.0 12.3 154 Parker Peak 9400 36.2 20.0 181 30.2 17.8 170 Sylvan Lake 8420 27.5 19.7 140 29.3 22.5 130 Thumb Divide 7980 20.7 14.6 142 20.3 18.8 108 Two Ocean Plateau 9240 40.2 26.6 151 30.5 27.4 111 White Mill 8700 43.4 22.9 190 33.5 23.9 140 Wolverine 7650 23.9 9.4 254 22.6 12.3 184 ----- ----- Basin Index (%) 169 143 WIND RIVER Burroughs Creek 8750 17.3 -M * 19.0 -M * Castle Creek 8400 8.7 -M * 10.4 -M * Cold Springs 9630 10.2 6.3 162 10.5 10.2 103 Deer Park 9700 13.2 16.1 82 16.2 20.4 79 Hobbs Park 10100 18.5 14.6 127 15.9 13.8 115 Kirwin 9550 20.8 9.7 214 18.8 11.7 161 Little Warm 9370 17.6 10.2 173 18.4 13.0 142 Owl Creek 8975 4.6 5.7 81 6.4 6.2 103 South Pass 9040 12.5 15.6 80 -M 17.7 * St. Lawrence Alt 8620 1.5 6.9 22 8.7 9.2 95 Togwotee Pass 9580 34.6 22.6 153 32.8 24.5 134 Townsend Creek 8700 7.4 9.9 75 9.7 12.4 78 ----- ----- Basin Index (%) 120 113 BIGHORN BASIN Bald Mtn. 9380 22.9 19.3 119 17.1 17.3 99 Bear Trap Meadow 8200 -M 4.7 * 11.7 8.8 133 Bone Springs Div 9350 21.0 17.0 124 16.2 15.8 103 Grave Springs 8550 8.4 9.5 88 -M 11.0 * Kirwin 9550 20.8 9.7 214 18.8 11.7 161 Marquette 8760 7.0 -M * 10.7 -M * Middle Powder 7760 10.7 12.3 87 7.1 12.0 59 Owl Creek 8975 4.6 5.7 81 6.4 6.2 103 Powder River Pass 9480 16.9 10.3 164 16.6 12.9 129 Shell Creek 9580 22.5 15.5 145 17.2 14.0 123 Timber Creek 7950 3.5 5.1 69 -M 7.6 * ----- ----- Basin Index (%) 126 113 SHOSHONE RIVER Blackwater 9780 36.9 23.1 160 -M 20.8 * Evening Star 9200 44.4 24.1 184 42.3 27.6 153 Marquette 8760 7.0 -M * 10.7 -M * Sylvan Road 7120 15.6 10.4 150 23.5 16.8 140 Younts Peak 8350 -M 14.5 * -M 15.9 * ----- ----- Basin Index (%) 168 148* POWDER RIVER Bear Trap Meadow 8200 -M 4.7 * 11.7 8.8 133 Cloud Peak Reservoir 9860 17.2 15.2 113 15.6 13.7 114 Grave Springs 8550 8.4 9.5 88 -M 11.0 * Hansen Sawmill 8360 10.0 6.1 164 11.6 8.8 132 Middle Powder 7760 10.7 12.3 87 7.1 12.0 59 Powder River Pass 9480 16.9 10.3 164 16.6 12.9 129 Soldier Park 8720 8.8 -M * 11.2 -M * ----- ----- Basin Index (%) 118 111 TONGUE RIVER Big Goose 7990 9.5 9.9 96 10.0 11.9 84 Bone Springs Div 9350 21.0 17.0 124 16.2 15.8 103 Burgess Junction 7880 11.4 12.2 93 9.7 12.7 76 Dome Lake 8880 16.4 11.9 138 13.4 14.0 96 Little Goose 8870 11.3 -M * 13.5 -M * Sucker Creek 8880 12.5 12.5 100 10.3 14.8 70 Tie Creek 6870 6.2 5.3 117 10.5 12.1 87 ----- ----- Basin Index (%) 112 86 BELLE FOURCHE Cole Canyon 5910 8.1 4.3 188 11.1 9.7 114 ----- ----- Basin Index (%) 188 114 CHEYENNE RIVER BASIN Blind Park 6890 9.1 6.4 142 12.6 12.2 103 North Rapid Creek 6130 7.9 6.2 127 9.9 10.2 97 ----- ----- Basin Index (%) 135 100 UPPER N. PLATTE Arapaho Ridge 10960 22.4 21.3 105 22.0 23.2 95 Blackhall Mtn 9820 30.3 -M * 28.8 -M * Columbine 9160 26.0 23.0 113 27.3 25.9 105 Divide Peak 8880 15.2 20.3 75 19.1 21.8 88 Joe Wright 10120 22.2 21.8 102 31.8 26.2 121 Laprele Creek 8375 7.2 9.4 77 8.9 12.8 70 Med Bow 10500 43.7 -M * 31.1 -M * North French Creek 10130 31.0 30.7 101 29.6 27.2 109 Never Summer 10280 21.3 20.5 104 17.5 -M * Old Battle 10000 27.3 31.9 86 25.7 35.5 72 Rawah 9020 11.9 10.4 114 16.1 14.8 109 Sage Creek Basin 7850 6.9 10.8 64 11.1 14.9 74 Sand Lake 10050 29.5 29.8 99 25.1 25.2 100 South Brush Creek 8440 11.4 11.6 98 13.0 15.6 83 Tower 10500 41.7 46.9 89 -M 40.3 * Webber Springs 9250 19.2 23.3 82 22.7 27.1 84 Willow Creek Pass 9540 14.2 12.5 114 15.1 13.7 110 Zirkel 9340 28.5 25.5 112 33.4 29.0 115 ----- ----- Basin Index (%) 96 96 SWEETWATER Deer Park 9700 13.2 16.1 82 16.2 20.4 79 Larsen Creek 9000 11.9 11.2 106 12.0 -M * South Pass 9040 12.5 15.6 80 -M 17.7 * ----- ----- Basin Index (%) 88 79* LOWER N. PLATTE Casper Mtn. 7900 8.7 14.5 60 7.4 15.4 48 Laprele Creek 8375 7.2 9.4 77 8.9 12.8 70 Reno Hill 8400 10.8 14.2 76 12.3 15.9 77 Windy Peak 7900 7.0 7.6 92 9.2 10.8 85 ----- ----- Basin Index (%) 74 69 LARAMIE RIVER Brooklyn Lake 10240 27.2 22.3 122 27.0 21.5 126 Cinnabar Park 9574 22.6 21.4 106 26.1 24.6 106 Crow Creek 8330 4.7 6.3 75 11.8 11.3 104 Deadman Hill 10220 22.0 16.5 133 20.7 17.7 117 Rawah 9020 11.9 10.4 114 16.1 14.8 109 Roach 9700 14.3 16.6 86 18.1 19.6 92 ----- ----- Basin Index (%) 110 109 S. PLATTE Black Mountain 8920 11.0 -M * 14.2 -M * Crow Creek 8330 4.7 6.3 75 11.8 11.3 104 Deadman Hill 10220 22.0 16.5 133 20.7 17.7 117 ----- ----- Basin Index (%) 117 112 LITTLE SNAKE RIVER Battle Mountain 7440 5.5 8.4 65 11.9 15.2 78 Divide Peak 8880 15.2 20.3 75 19.1 21.8 88 Elk River 8700 16.0 18.4 87 18.0 20.4 88 Little Snake River 8915 23.1 26.0 89 29.8 30.5 98 Old Battle 10000 27.3 31.9 86 25.7 35.5 72 Sage Creek Basin 7850 6.9 10.8 64 11.1 14.9 74 Sandstone RS 8150 9.3 12.6 74 10.3 18.6 55 Whiskey Park 8950 26.6 27.6 96 27.4 28.3 97 ----- ----- Basin Index (%) 83 83 UPPER GREEN RIVER Big Sandy Opening 9080 14.1 12.9 109 13.8 13.5 102 Blind Bull Sum 8650 36.3 23.5 154 21.5 19.6 110 East Rim Divide 7930 12.9 10.2 126 13.2 11.8 112 Elkhart Park G.S. 9400 13.5 12.3 110 12.7 13.5 94 Gros Ventre Summit 8750 17.4 12.8 136 16.5 13.1 126 Gunsight Pass 9820 18.8 13.8 136 17.8 14.1 126 Kendall R.S. 7740 15.3 10.9 140 16.8 14.3 117 Loomis Park 8240 19.3 13.7 141 19.9 17.4 114 New Fork Lake 8340 12.2 10.1 121 12.3 10.9 113 Pocket Creek 9360 9.7 -M * 9.8 -M * Snider Basin 8060 12.3 12.2 101 15.6 14.3 109 Spring Creek Divide 9000 28.1 22.7 124 26.2 23.9 110 Triple Peak 8500 34.3 21.0 163 33.8 25.5 133 ----- ----- Basin Index (%) 133 115 LOWER GREEN RIVER Blacks Fork Jct 8869 6.6 -M * 9.5 -M * Buck Pasture 9632 11.7 -M * 13.9 -M * EF Blacks Fork GS 9360 10.1 -M * -M -M * Hams Fork 7840 8.9 9.7 92 10.1 11.5 88 Hewinta 9500 7.3 10.6 69 12.0 14.4 83 Hickerson Park 9122 5.5 7.7 71 8.2 10.5 78 Hole-in-Rock 9168 6.7 7.1 94 8.8 10.0 88 Indian Creek 9425 23.6 24.8 95 17.1 22.7 75 Kelley R.S. 8180 14.1 14.3 99 15.5 18.2 85 Spirit Lk 10235 10.5 -M * 12.1 -M * Steel Creek Park 10158 14.3 16.0 89 14.6 16.9 86 ----- ----- Basin Index (%) 89 83 UPPER BEAR RIVER Bear River RS 8777 4.0 -M * 10.9 -M * Bug Lake 7987 14.3 19.0 75 17.0 19.6 87 Burts Miller Ranch 8000 1.3 -M * 6.4 -M * Chalk Creek #1 9171 15.0 24.7 61 16.9 25.6 66 Hayden Fork 9130 10.0 14.9 67 17.1 21.4 80 Kelley R.S. 8180 14.1 14.3 99 15.5 18.2 85 Lily Lake 9133 9.1 12.7 72 11.7 17.5 67 Monte Cristo 8932 23.1 27.9 83 23.0 26.3 87 Salt River Summit 7640 10.8 12.3 88 13.8 16.8 82 ----- ----- Basin Index (%) 77 79 ----------------------------------------------------------------------------- -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.