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 FRIDAY: MARCH 23 , 2018 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.4 14.6 119 19.4 19.2 101 Black Bear 8170 39.0 33.1 118 38.1 34.9 109 Blind Bull Sum 8650 30.8 20.8 148 18.5 17.9 103 Cottonwood Creek 7670 20.3 20.3 100 23.3 22.3 104 East Rim Divide 7930 11.3 9.6 118 11.4 10.7 107 Grand Targhee 9260 43.5 33.4 130 27.8 27.4 101 Granite Creek 6770 16.6 14.7 113 19.7 18.3 108 Grassy Lake 7265 30.4 29.7 102 33.3 33.1 101 Gros Ventre Summit 8750 13.9 11.8 118 13.4 11.6 116 Gunsight Pass 9820 15.0 12.3 122 14.6 12.2 120 Lewis Lake Divide 7850 36.5 28.2 129 36.2 32.5 111 Phillips Bench 8200 25.6 22.8 112 25.5 25.6 100 Salt River Summit 7640 10.4 12.2 85 11.9 15.2 78 Snake River Station 6920 17.4 15.5 112 22.3 20.6 108 Spring Creek Divide 9000 25.7 21.6 119 23.3 21.8 107 Thumb Divide 7980 18.9 14.4 131 17.8 16.7 107 Togwotee Pass 9580 29.8 20.9 143 29.4 22.0 134 Two Ocean Plateau 9240 35.3 24.4 145 27.7 24.8 112 Willow Creek 8080 -M 25.3 * 32.4 30.4 107 Younts Peak 8350 -M 13.6 * -M 14.3 * ----- ----- Basin Index (%) 122 107 MADISON-GALLATIN Black Bear 8170 39.0 33.1 118 38.1 34.9 109 Canyon 7870 16.0 11.8 136 18.5 14.7 126 Madison Plateau 7750 26.7 20.4 131 25.6 23.9 107 West Yellowstone 6700 12.9 10.0 129 16.4 12.8 128 Whiskey Creek 6800 15.9 14.4 110 17.5 18.3 96 ----- ----- Basin Index (%) 123 111 YELLOWSTONE Beartooth Lake 9360 36.5 19.8 184 -M 18.0 * Burnt Mtn 5880 6.7 4.7 143 13.1 11.0 119 Canyon 7870 16.0 11.8 136 18.5 14.7 126 Cole Creek 7850 12.6 12.3 102 -M 11.0 * Evening Star 9200 37.8 22.7 167 40.6 24.8 164 Fisher Creek 9100 49.0 28.4 173 43.1 28.9 149 Northeast Entrance 7350 13.6 9.3 146 17.1 11.1 154 Parker Peak 9400 31.1 17.9 174 27.3 15.9 172 Sylvan Lake 8420 23.7 18.4 129 25.1 20.2 124 Thumb Divide 7980 18.9 14.4 131 17.8 16.7 107 Two Ocean Plateau 9240 35.3 24.4 145 27.7 24.8 112 White Mill 8700 38.4 20.4 188 29.5 21.5 137 Wolverine 7650 20.2 8.9 227 19.6 11.1 177 ----- ----- Basin Index (%) 159 139 WIND RIVER Burroughs Creek 8750 15.4 -M * 17.1 -M * Castle Creek 8400 7.8 -M * 9.3 -M * Cold Springs 9630 9.0 6.6 136 9.3 8.7 107 Deer Park 9700 11.5 13.9 83 14.1 17.4 81 Hobbs Park 10100 15.8 12.2 130 13.4 11.3 119 Kirwin 9550 17.5 8.5 206 16.7 10.2 164 Little Warm 9370 14.6 9.4 155 15.1 11.3 134 Owl Creek 8975 3.7 4.7 79 5.5 5.1 108 South Pass 9040 10.8 14.3 76 -M 15.5 * St. Lawrence Alt 8620 3.4 6.4 53 7.9 7.7 103 Togwotee Pass 9580 29.8 20.9 143 29.4 22.0 134 Townsend Creek 8700 6.5 8.5 76 8.2 10.2 80 ----- ----- Basin Index (%) 116 115 BIGHORN BASIN Bald Mtn. 9380 18.9 16.6 114 13.4 15.1 89 Bear Trap Meadow 8200 8.4 5.2 162 9.0 7.3 123 Bone Springs Div 9350 16.8 14.2 118 12.9 13.6 95 Grave Springs 8550 6.0 8.3 72 -M 9.2 * Kirwin 9550 17.5 8.5 206 16.7 10.2 164 Marquette 8760 5.1 -M * 8.9 -M * Middle Powder 7760 7.5 10.2 74 -M 10.3 * Owl Creek 8975 3.7 4.7 79 5.5 5.1 108 Powder River Pass 9480 14.8 9.4 157 13.9 11.1 125 Shell Creek 9580 19.2 13.1 147 14.2 12.1 117 Timber Creek 7950 2.9 4.1 71 -M 6.3 * ----- ----- Basin Index (%) 123 115 SHOSHONE RIVER Blackwater 9780 32.3 21.0 154 29.8 18.4 162 Evening Star 9200 37.8 22.7 167 40.6 24.8 164 Marquette 8760 5.1 -M * 8.9 -M * Sylvan Road 7120 13.4 10.6 126 20.0 15.3 131 Younts Peak 8350 -M 13.6 * -M 14.3 * ----- ----- Basin Index (%) 154 155 POWDER RIVER Bear Trap Meadow 8200 8.4 5.2 162 9.0 7.3 123 Cloud Peak Reservoir 9860 13.8 13.2 105 12.4 11.5 108 Grave Springs 8550 6.0 8.3 72 -M 9.2 * Hansen Sawmill 8360 6.8 5.8 117 8.5 7.4 115 Middle Powder 7760 7.5 10.2 74 -M 10.3 * Powder River Pass 9480 14.8 9.4 157 13.9 11.1 125 Soldier Park 8720 5.6 -M * 8.3 -M * ----- ----- Basin Index (%) 110 117 TONGUE RIVER Big Goose 7990 6.6 8.0 82 7.0 9.4 74 Bone Springs Div 9350 16.8 14.2 118 12.9 13.6 95 Burgess Junction 7880 8.1 9.8 83 7.3 10.7 68 Dome Lake 8880 13.0 10.5 124 10.2 11.7 87 Little Goose 8870 8.0 -M * 10.3 -M * Sucker Creek 8880 8.8 11.0 80 6.9 12.5 55 Tie Creek 6870 3.8 5.1 75 7.5 9.9 76 ----- ----- Basin Index (%) 97 76 BELLE FOURCHE Cole Canyon 5910 6.5 5.6 116 8.2 8.0 102 ----- ----- Basin Index (%) 116 102 CHEYENNE RIVER BASIN Blind Park 6890 7.1 7.1 100 10.1 10.6 95 North Rapid Creek 6130 6.8 6.6 103 7.7 8.7 89 ----- ----- Basin Index (%) 101 92 UPPER N. PLATTE Arapaho Ridge 10960 17.5 18.2 96 17.2 19.9 86 Blackhall Mtn 9820 24.8 -M * 24.2 -M * Columbine 9160 21.2 22.1 96 21.1 23.3 91 Divide Peak 8880 13.4 18.0 74 16.4 19.4 85 Joe Wright 10120 16.2 19.3 84 25.3 23.2 109 Laprele Creek 8375 5.9 9.3 63 7.2 11.0 65 Med Bow 10500 36.4 -M * 30.4 -M * North French Creek 10130 24.4 26.1 93 23.8 24.0 99 Never Summer 10280 16.6 18.2 91 13.8 -M * Old Battle 10000 22.6 27.1 83 22.0 31.9 69 Rawah 9020 9.6 9.7 99 13.5 12.4 109 Sage Creek Basin 7850 8.6 11.6 74 9.5 13.0 73 Sand Lake 10050 23.8 25.3 94 20.0 22.0 91 South Brush Creek 8440 8.8 11.3 78 10.4 13.6 76 Tower 10500 30.9 40.7 76 26.5 36.2 73 Webber Springs 9250 16.7 21.5 78 19.5 24.2 81 Willow Creek Pass 9540 12.0 11.1 108 12.9 11.9 108 Zirkel 9340 25.2 25.5 99 28.5 25.6 111 ----- ----- Basin Index (%) 87 88 SWEETWATER Deer Park 9700 11.5 13.9 83 14.1 17.4 81 Larsen Creek 9000 11.3 11.4 99 10.9 -M * South Pass 9040 10.8 14.3 76 -M 15.5 * ----- ----- Basin Index (%) 85 81* LOWER N. PLATTE Casper Mtn. 7900 7.2 12.6 57 5.8 13.0 45 Laprele Creek 8375 5.9 9.3 63 7.2 11.0 65 Reno Hill 8400 8.9 12.3 72 10.2 13.2 77 Windy Peak 7900 5.7 7.4 77 7.5 9.2 82 ----- ----- Basin Index (%) 67 66 LARAMIE RIVER Brooklyn Lake 10240 22.7 18.0 126 22.5 18.8 120 Cinnabar Park 9574 19.4 18.7 104 22.4 21.6 104 Crow Creek 8330 3.7 6.9 54 9.8 9.1 108 Deadman Hill 10220 18.4 14.2 130 17.7 15.2 116 Rawah 9020 9.6 9.7 99 13.5 12.4 109 Roach 9700 12.2 14.3 85 15.3 17.1 89 ----- ----- Basin Index (%) 105 107 S. PLATTE Black Mountain 8920 9.7 -M * 12.3 -M * Crow Creek 8330 3.7 6.9 54 9.8 9.1 108 Deadman Hill 10220 18.4 14.2 130 17.7 15.2 116 ----- ----- Basin Index (%) 105 113 LITTLE SNAKE RIVER Battle Mountain 7440 6.2 11.3 55 9.3 13.7 68 Divide Peak 8880 13.4 18.0 74 16.4 19.4 85 Elk River 8700 13.3 17.5 76 14.3 18.2 79 Little Snake River 8915 18.9 21.4 88 24.8 26.8 93 Old Battle 10000 22.6 27.1 83 22.0 31.9 69 Sage Creek Basin 7850 8.6 11.6 74 9.5 13.0 73 Sandstone RS 8150 8.0 12.7 63 7.7 16.9 46 Whiskey Park 8950 21.6 24.5 88 22.7 25.3 90 ----- ----- Basin Index (%) 78 77 UPPER GREEN RIVER Big Sandy Opening 9080 12.0 11.9 101 12.3 12.0 102 Blind Bull Sum 8650 30.8 20.8 148 18.5 17.9 103 East Rim Divide 7930 11.3 9.6 118 11.4 10.7 107 Elkhart Park G.S. 9400 11.8 11.0 107 11.3 12.0 94 Gros Ventre Summit 8750 13.9 11.8 118 13.4 11.6 116 Gunsight Pass 9820 15.0 12.3 122 14.6 12.2 120 Kendall R.S. 7740 13.8 11.4 121 14.4 13.1 110 Loomis Park 8240 16.6 13.7 121 17.2 15.7 110 New Fork Lake 8340 11.3 9.5 119 10.4 9.8 106 Pocket Creek 9360 8.4 -M * 8.4 -M * Snider Basin 8060 12.6 11.2 112 14.1 12.9 109 Spring Creek Divide 9000 25.7 21.6 119 23.3 21.8 107 Triple Peak 8500 27.3 20.0 136 28.6 23.1 124 ----- ----- Basin Index (%) 123 110 LOWER GREEN RIVER Blacks Fork Jct 8869 7.2 -M * 8.3 -M * Buck Pasture 9632 11.3 -M * 12.1 -M * EF Blacks Fork GS 9360 10.1 -M * 5.4 -M * Hams Fork 7840 9.1 10.5 87 9.0 10.3 87 Hewinta 9500 7.7 9.9 78 10.5 12.6 83 Hickerson Park 9122 -M 6.8 * 7.5 9.1 82 Hole-in-Rock 9168 6.9 6.8 101 7.9 8.5 93 Indian Creek 9425 20.6 21.8 94 15.1 20.5 74 Kelley R.S. 8180 12.9 13.8 93 14.0 16.5 85 Spirit Lk 10235 10.2 -M * 11.3 -M * Steel Creek Park 10158 11.1 13.7 81 12.6 14.6 86 ----- ----- Basin Index (%) 89 83 UPPER BEAR RIVER Bear River RS 8777 7.6 -M * 9.8 -M * Bug Lake 7987 14.3 17.0 84 14.9 17.7 84 Burts Miller Ranch 8000 4.8 -M * 6.1 -M * Chalk Creek #1 9171 14.0 21.9 64 15.0 22.6 66 Hayden Fork 9130 11.5 14.5 79 15.1 18.9 80 Kelley R.S. 8180 12.9 13.8 93 14.0 16.5 85 Lily Lake 9133 8.4 11.5 73 11.7 15.3 76 Monte Cristo 8932 20.0 24.9 80 19.4 23.5 83 Salt River Summit 7640 10.4 12.2 85 11.9 15.2 78 ----- ----- Basin Index (%) 79 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.