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 21 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 18.1 14.7 123 20.4 19.1 107 Black Bear 8170 40.5 32.7 124 39.8 34.7 115 Blind Bull Sum 8650 21.4 20.6 104 17.3 17.7 98 Cottonwood Creek 7670 19.0 20.1 95 22.5 22.0 102 East Rim Divide 7930 10.3 9.6 107 10.4 10.6 98 Grand Targhee 9260 39.1 33.1 118 29.3 27.2 108 Granite Creek 6770 18.8 14.9 126 19.6 18.2 108 Grassy Lake 7265 31.7 29.4 108 34.7 32.8 106 Gros Ventre Summit 8750 8.4 11.7 72 11.2 11.5 97 Gunsight Pass 9820 12.2 12.1 101 14.0 12.2 115 Lewis Lake Divide 7850 32.7 27.9 117 -M 32.2 * Phillips Bench 8200 27.2 22.5 121 29.9 25.4 118 Salt River Summit 7640 12.5 12.1 103 14.2 15.0 95 Snake River Station 6920 19.9 15.3 130 24.2 20.5 118 Spring Creek Divide 9000 21.2 21.3 100 21.8 21.5 101 Thumb Divide 7980 17.7 14.2 125 17.6 16.6 106 Togwotee Pass 9580 22.1 20.7 107 22.7 21.8 104 Two Ocean Plateau 9240 27.9 24.1 116 23.8 24.5 97 Willow Creek 8080 28.5 25.4 112 31.1 30.1 103 Younts Peak 8350 -M 13.5 * -M 14.2 * ----- ----- Basin Index (%) 112 106 MADISON-GALLATIN Black Bear 8170 40.5 32.7 124 39.8 34.7 115 Canyon 7870 12.7 11.8 108 14.6 14.6 100 Madison Plateau 7750 26.4 20.1 131 25.6 23.8 108 West Yellowstone 6700 14.0 9.9 141 16.0 12.8 125 Whiskey Creek 6800 18.5 14.2 130 19.1 18.2 105 ----- ----- Basin Index (%) 126 111 YELLOWSTONE Beartooth Lake 9360 18.6 19.5 95 17.4 17.8 98 Burnt Mtn 5880 7.9 4.6 172 12.1 11.0 110 Canyon 7870 12.7 11.8 108 14.6 14.6 100 Cole Creek 7850 14.3 12.1 118 -M 10.8 * Evening Star 9200 23.9 22.4 107 26.2 24.6 107 Fisher Creek 9100 28.4 28.3 100 31.1 28.7 108 Northeast Entrance 7350 9.9 9.1 109 12.2 11.0 111 Parker Peak 9400 21.8 17.7 123 21.8 15.7 139 Sylvan Lake 8420 19.6 18.2 108 24.7 20.1 123 Thumb Divide 7980 17.7 14.2 125 17.6 16.6 106 Two Ocean Plateau 9240 27.9 24.1 116 23.8 24.5 97 White Mill 8700 20.1 20.0 100 17.7 21.3 83 Wolverine 7650 11.8 8.9 133 11.6 11.0 105 Younts Peak 8350 -M 13.5 * -M 14.2 * ----- ----- Basin Index (%) 111 106 WIND RIVER Burroughs Creek 8750 9.9 -M * 11.7 -M * Castle Creek 8400 3.9 -M * 5.1 -M * Cold Springs 9630 6.3 6.4 98 6.6 8.6 77 Deer Park 9700 15.0 13.5 111 16.2 17.3 94 Hobbs Park 10100 12.9 11.9 108 9.8 11.2 88 Kirwin 9550 9.4 8.4 112 9.9 10.0 99 Little Warm 9370 8.0 9.3 86 7.7 11.2 69 Owl Creek 8975 4.5 4.6 98 5.1 5.0 102 South Pass 9040 12.7 14.0 91 10.6 15.5 68 St. Lawrence Alt 8620 4.2 6.2 68 7.5 7.6 99 Togwotee Pass 9580 22.1 20.7 107 22.7 21.8 104 Townsend Creek 8700 8.2 8.3 99 9.1 10.2 89 ----- ----- Basin Index (%) 100 89 BIGHORN BASIN Bald Mtn. 9380 15.6 16.5 95 11.6 15.0 77 Bear Trap Meadow 8200 7.5 5.1 147 6.5 7.2 90 Bone Springs Div 9350 12.0 14.2 85 10.6 13.5 79 Grave Springs 8550 7.6 8.2 93 8.5 9.0 94 Kirwin 9550 9.4 8.4 112 9.9 10.0 99 Marquette 8760 6.7 -M * 7.9 -M * Middle Powder 7760 8.5 9.9 86 4.6 10.1 46 Owl Creek 8975 4.5 4.6 98 5.1 5.0 102 Powder River Pass 9480 9.0 9.2 98 8.6 10.9 79 Shell Creek 9580 12.2 12.9 95 10.5 11.9 88 Timber Creek 7950 3.2 4.2 76 5.1 6.2 82 ----- ----- Basin Index (%) 96 82 SHOSHONE RIVER Blackwater 9780 21.5 20.9 103 21.7 18.2 119 Evening Star 9200 23.9 22.4 107 26.2 24.6 107 Marquette 8760 6.7 -M * 7.9 -M * Sylvan Lake 8420 19.6 18.2 108 24.7 20.1 123 Sylvan Road 7120 11.3 10.5 108 15.1 15.2 99 Younts Peak 8350 -M 13.5 * -M 14.2 * ----- ----- Basin Index (%) 106 112 POWDER RIVER Bear Trap Meadow 8200 7.5 5.1 147 6.5 7.2 90 Cloud Peak Reservoir 9860 10.9 13.0 84 9.8 11.3 87 Grave Springs 8550 7.6 8.2 93 8.5 9.0 94 Hansen Sawmill 8360 5.0 5.7 88 6.4 7.2 89 Middle Powder 7760 8.5 9.9 86 4.6 10.1 46 Powder River Pass 9480 9.0 9.2 98 8.6 10.9 79 Soldier Park 8720 3.8 -M * 6.2 -M * ----- ----- Basin Index (%) 95 80 TONGUE RIVER Big Goose 7990 7.4 7.9 94 9.1 9.3 98 Bone Springs Div 9350 12.0 14.2 85 10.6 13.5 79 Burgess Junction 7880 7.7 9.6 80 7.9 10.6 75 Dome Lake 8880 8.1 10.3 79 7.3 11.6 63 Little Goose 8870 8.6 -M * 7.1 -M * Sucker Creek 8880 10.0 10.9 92 9.4 12.3 76 Tie Creek 6870 4.5 5.0 90 8.9 9.8 91 ----- ----- Basin Index (%) 86 79 BELLE FOURCHE Blind Park 6890 8.7 7.2 121 7.1 10.5 68 Cole Canyon 5910 7.1 5.5 129 10.7 7.9 135 ----- ----- Basin Index (%) 124 97 CHEYENNE RIVER BASIN Blind Park 6890 8.7 7.2 121 7.1 10.5 68 North Rapid Creek 6130 7.4 6.5 114 6.6 8.6 77 ----- ----- Basin Index (%) 118 72 UPPER N. PLATTE Arapaho Ridge 10960 24.6 18.1 136 24.7 19.8 125 Blackhall Mtn 9820 31.2 -M * 31.3 -M * Columbine 9160 29.2 22.0 133 27.6 23.1 119 Divide Peak 8880 20.3 17.7 115 22.4 19.2 117 Joe Wright 10120 21.1 19.2 110 28.3 23.0 123 Laprele Creek 8375 12.6 9.2 137 13.0 10.9 119 Med Bow 10500 35.8 -M * 32.6 -M * Never Summer 10280 21.3 17.9 119 17.8 -M * North French Creek 10130 29.4 25.5 115 28.6 23.8 120 Old Battle 10000 34.7 26.6 130 -M 31.6 * Rawah 9020 14.6 9.6 152 16.8 12.3 137 Sage Creek Basin 7850 17.7 11.5 154 16.0 13.0 123 Sand Lake 10050 27.7 24.9 111 23.8 21.8 109 South Brush Creek 8440 11.6 11.2 104 11.7 13.4 87 Tower 10500 49.1 40.2 122 -M 35.9 * Webber Springs 9250 25.8 21.2 122 29.9 24.0 125 Whiskey Park 8950 30.5 24.4 125 31.5 25.1 125 Willow Creek Pass 9540 15.4 11.0 140 16.3 11.8 138 Zirkel 9340 32.7 25.7 127 35.9 25.5 141 ----- ----- Basin Index (%) 125 122 SWEETWATER Deer Park 9700 15.0 13.5 111 16.2 17.3 94 Larsen Creek 9000 10.6 11.2 95 13.6 -M * South Pass 9040 12.7 14.0 91 10.6 15.5 68 ----- ----- Basin Index (%) 99 82 LOWER N. PLATTE Casper Mtn. 7900 14.3 12.3 116 11.0 12.9 85 Laprele Creek 8375 12.6 9.2 137 13.0 10.9 119 Reno Hill 8400 15.0 12.1 124 15.6 13.1 119 Windy Peak 7900 10.5 7.2 146 10.7 9.2 116 ----- ----- Basin Index (%) 128 109 LARAMIE RIVER Brooklyn Lake 10240 23.2 17.8 130 24.4 18.6 131 Cinnabar Park 9574 19.8 18.2 109 22.2 21.5 103 Crow Creek 8330 5.7 6.9 83 9.6 8.9 108 Deadman Hill 10220 20.0 14.0 143 18.8 15.1 125 Rawah 9020 14.6 9.6 152 16.8 12.3 137 Roach 9700 17.3 14.1 123 20.4 17.0 120 Windy Peak 7900 10.5 7.2 146 10.7 9.2 116 ----- ----- Basin Index (%) 127 120 S. PLATTE Black Mountain 8920 11.2 -M * 12.1 -M * Crow Creek 8330 5.7 6.9 83 9.6 8.9 108 Deadman Hill 10220 20.0 14.0 143 18.8 15.1 125 ----- ----- Basin Index (%) 123 118 LITTLE SNAKE RIVER Battle Mountain 7440 13.5 11.4 118 15.7 13.7 115 Divide Peak 8880 20.3 17.7 115 22.4 19.2 117 Elk River 8700 20.4 17.4 117 18.8 18.0 104 Little Snake River 8915 28.4 21.2 134 36.0 26.6 135 Old Battle 10000 34.7 26.6 130 -M 31.6 * Sage Creek Basin 7850 17.7 11.5 154 16.0 13.0 123 Sandstone RS 8150 17.7 12.4 143 18.1 16.8 108 Whiskey Park 8950 30.5 24.4 125 31.5 25.1 125 ----- ----- Basin Index (%) 128 120 UPPER GREEN RIVER Big Sandy Opening 9080 12.8 11.7 109 13.6 11.9 114 Blind Bull Sum 8650 21.4 20.6 104 17.3 17.7 98 East Rim Divide 7930 10.3 9.6 107 10.4 10.6 98 Elkhart Park G.S. 9400 11.7 10.8 108 12.4 11.9 104 Gros Ventre Summit 8750 8.4 11.7 72 11.2 11.5 97 Gunsight Pass 9820 12.2 12.1 101 14.0 12.2 115 Indian Creek 9425 19.9 21.5 93 16.0 20.2 79 Kendall R.S. 7740 11.0 11.3 97 11.1 13.0 85 Loomis Park 8240 15.3 13.4 114 15.8 15.6 101 New Fork Lake 8340 9.2 9.3 99 8.7 9.7 90 Pocket Creek 9360 13.2 -M * 14.0 -M * Snider Basin 8060 10.9 11.1 98 12.6 12.8 98 Spring Creek Divide 9000 21.2 21.3 100 21.8 21.5 101 Triple Peak 8500 21.2 19.6 108 23.1 22.8 101 ----- ----- Basin Index (%) 101 98 LOWER GREEN RIVER Blacks Fork Jct 8869 8.4 -M * 11.5 -M * Buck Pasture 9632 13.7 -M * 16.6 -M * EF Blacks Fork GS 9360 11.1 -M * 9.4 -M * Hams Fork 7840 10.0 10.4 96 10.2 10.2 100 Hewinta 9500 11.1 10.0 111 13.0 12.4 105 Hickerson Park 9122 7.8 6.7 116 10.1 9.0 112 Hole-in-Rock 9168 6.3 6.7 94 9.4 8.4 112 Indian Creek 9425 19.9 21.5 93 16.0 20.2 79 Kelley R.S. 8180 -M 13.5 * -M 16.3 * Spirit Lk 10235 14.0 -M * 14.4 -M * Steel Creek Park 10158 13.7 13.5 101 16.1 14.4 112 ----- ----- Basin Index (%) 100 100 UPPER BEAR RIVER Bear River RS 8777 10.9 -M * 13.6 -M * Bug Lake 7987 21.7 16.8 129 21.1 17.5 121 Burts Miller Ranch 8000 7.7 -M * 7.8 -M * Chalk Creek #1 9171 23.5 21.4 110 27.1 22.3 122 Hayden Fork 9130 16.6 14.4 115 21.3 18.7 114 Kelley R.S. 8180 -M 13.5 * -M 16.3 * Lily Lake 9133 11.6 11.4 102 14.8 15.1 98 Monte Cristo 8932 29.4 24.6 120 28.2 23.3 121 Salt River Summit 7640 12.5 12.1 103 14.2 15.0 95 Spring Creek Divide 9000 21.2 21.3 100 21.8 21.5 101 ----- ----- Basin Index (%) 112 111 ----------------------------------------------------------------------------- -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.