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 11 , 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 13.8 131 20.1 18.3 110 Black Bear 8170 40.4 31.5 128 39.6 33.1 120 Blind Bull Sum 8650 20.9 19.4 108 16.9 16.9 100 Cottonwood Creek 7670 19.1 18.5 103 22.1 20.7 107 East Rim Divide 7930 10.1 9.4 107 10.3 10.2 101 Grand Targhee 9260 38.5 31.9 121 28.9 25.7 112 Granite Creek 6770 18.6 14.6 127 19.2 17.5 110 Grassy Lake 7265 31.2 27.6 113 34.4 31.2 110 Gros Ventre Summit 8750 8.6 10.9 79 10.6 10.9 97 Gunsight Pass 9820 12.1 11.6 104 14.0 11.6 121 Lewis Lake Divide 7850 32.5 26.5 123 30.8 30.8 100 Phillips Bench 8200 27.1 21.2 128 -M 24.2 * Salt River Summit 7640 12.1 11.2 108 13.8 14.2 97 Snake River Station 6920 19.7 15.2 130 24.0 19.6 122 Spring Creek Divide 9000 20.7 19.6 106 21.3 20.4 104 Thumb Divide 7980 17.3 13.2 131 16.2 15.8 103 Togwotee Pass 9580 22.0 19.5 113 22.5 20.7 109 Two Ocean Plateau 9240 27.6 23.1 119 21.8 23.3 94 Willow Creek 8080 27.2 24.1 113 30.5 28.5 107 Younts Peak 8350 -M 12.4 * -M 13.4 * ----- ----- Basin Index (%) 117 107 MADISON-GALLATIN Black Bear 8170 40.4 31.5 128 39.6 33.1 120 Canyon 7870 12.5 11.5 109 14.2 14.0 101 Madison Plateau 7750 26.2 19.3 136 25.3 22.8 111 West Yellowstone 6700 14.0 9.7 144 15.9 12.4 128 Whiskey Creek 6800 18.3 13.2 139 18.7 17.4 107 ----- ----- Basin Index (%) 131 114 YELLOWSTONE Beartooth Lake 9360 18.4 18.4 100 17.0 16.8 101 Burnt Mtn 5880 7.8 4.3 181 11.9 10.2 117 Canyon 7870 12.5 11.5 109 14.2 14.0 101 Cole Creek 7850 13.7 11.2 122 -M 9.9 * Evening Star 9200 23.6 20.9 113 25.5 23.4 109 Fisher Creek 9100 28.2 27.0 104 30.7 27.2 113 Northeast Entrance 7350 10.1 8.6 117 12.1 10.5 115 Parker Peak 9400 -M 16.7 * -M 15.0 * Sylvan Lake 8420 19.3 17.0 114 24.5 19.0 129 Thumb Divide 7980 17.3 13.2 131 16.2 15.8 103 Two Ocean Plateau 9240 27.6 23.1 119 21.8 23.3 94 White Mill 8700 19.9 19.2 104 17.4 20.3 86 Wolverine 7650 11.7 9.0 130 11.5 10.5 110 Younts Peak 8350 -M 12.4 * -M 13.4 * ----- ----- Basin Index (%) 115 106 WIND RIVER Burroughs Creek 8750 9.7 -M * 11.4 -M * Castle Creek 8400 3.8 -M * 5.1 -M * Cold Springs 9630 5.8 5.9 98 6.2 8.0 78 Deer Park 9700 14.6 12.1 121 15.7 16.3 96 Hobbs Park 10100 12.0 11.0 109 8.8 10.4 85 Kirwin 9550 9.0 7.8 115 9.3 9.4 99 Little Warm 9370 7.7 8.7 89 7.2 10.5 69 Owl Creek 8975 4.4 4.3 102 4.9 4.6 107 South Pass 9040 12.2 12.5 98 10.4 14.5 72 St. Lawrence Alt 8620 3.6 5.9 61 7.1 7.0 101 Togwotee Pass 9580 22.0 19.5 113 22.5 20.7 109 Townsend Creek 8700 7.5 7.4 101 8.3 9.4 88 ----- ----- Basin Index (%) 104 91 BIGHORN BASIN Bald Mtn. 9380 14.9 16.0 93 10.7 13.9 77 Bear Trap Meadow 8200 7.0 4.7 149 6.0 6.6 91 Bone Springs Div 9350 11.5 13.3 86 9.8 12.6 78 Grave Springs 8550 6.8 7.5 91 7.3 8.3 88 Kirwin 9550 9.0 7.8 115 9.3 9.4 99 Marquette 8760 6.1 -M * 7.6 -M * Middle Powder 7760 8.1 8.8 92 4.2 9.3 45 Owl Creek 8975 4.4 4.3 102 4.9 4.6 107 Powder River Pass 9480 8.9 8.5 105 8.2 10.2 80 Shell Creek 9580 11.8 12.3 96 10.1 11.2 90 Timber Creek 7950 3.2 4.1 78 5.1 5.6 91 ----- ----- Basin Index (%) 98 82 SHOSHONE RIVER Blackwater 9780 21.3 19.1 112 21.5 17.2 125 Evening Star 9200 23.6 20.9 113 25.5 23.4 109 Marquette 8760 6.1 -M * 7.6 -M * Sylvan Lake 8420 19.3 17.0 114 24.5 19.0 129 Sylvan Road 7120 11.7 10.0 117 14.9 14.6 102 Younts Peak 8350 -M 12.4 * -M 13.4 * ----- ----- Basin Index (%) 113 116 POWDER RIVER Bear Trap Meadow 8200 7.0 4.7 149 6.0 6.6 91 Cloud Peak Reservoir 9860 9.7 11.8 82 8.5 10.3 83 Grave Springs 8550 6.8 7.5 91 7.3 8.3 88 Hansen Sawmill 8360 4.6 5.2 88 6.1 6.5 94 Middle Powder 7760 8.1 8.8 92 4.2 9.3 45 Powder River Pass 9480 8.9 8.5 105 8.2 10.2 80 Soldier Park 8720 3.3 -M * 5.8 -M * ----- ----- Basin Index (%) 97 79 TONGUE RIVER Big Goose 7990 6.5 6.9 94 8.3 8.4 99 Bone Springs Div 9350 11.5 13.3 86 9.8 12.6 78 Burgess Junction 7880 6.9 9.3 74 7.3 9.7 75 Dome Lake 8880 7.2 9.4 77 6.6 10.6 62 Little Goose 8870 7.6 -M * 6.5 -M * Sucker Creek 8880 8.9 10.1 88 8.1 11.4 71 Tie Creek 6870 3.9 4.7 83 8.4 9.0 93 ----- ----- Basin Index (%) 84 79 BELLE FOURCHE Blind Park 6890 7.1 6.8 104 6.2 10.0 62 Cole Canyon 5910 5.7 5.1 112 9.8 7.4 132 ----- ----- Basin Index (%) 108 92 CHEYENNE RIVER BASIN Blind Park 6890 7.1 6.8 104 6.2 10.0 62 North Rapid Creek 6130 5.9 6.3 94 5.8 8.1 72 ----- ----- Basin Index (%) 99 66 UPPER N. PLATTE Arapaho Ridge 10960 22.5 17.7 127 22.6 18.8 120 Blackhall Mtn 9820 28.8 -M * 29.9 -M * Columbine 9160 26.9 21.1 127 26.1 21.8 120 Divide Peak 8880 18.0 17.0 106 20.3 18.0 113 Joe Wright 10120 19.3 18.4 105 26.9 21.4 126 Laprele Creek 8375 10.3 8.5 121 10.9 10.1 108 Med Bow 10500 33.3 -M * 30.2 -M * Never Summer 10280 19.6 17.0 115 16.5 -M * North French Creek 10130 26.4 23.0 115 26.4 22.5 117 Old Battle 10000 32.5 25.6 127 31.1 29.8 104 Rawah 9020 12.6 9.3 135 15.1 11.5 131 Sage Creek Basin 7850 15.9 11.6 137 15.6 12.4 126 Sand Lake 10050 24.8 22.6 110 21.0 20.4 103 South Brush Creek 8440 10.1 11.1 91 10.5 12.6 83 Tower 10500 48.1 38.2 126 35.8 33.9 106 Webber Springs 9250 23.4 20.2 116 27.4 22.6 121 Whiskey Park 8950 -M 23.3 * -M 23.9 * Willow Creek Pass 9540 13.6 10.3 132 15.0 11.0 136 Zirkel 9340 31.3 25.2 124 31.3 24.6 127 ----- ----- Basin Index (%) 120 115 SWEETWATER Deer Park 9700 14.6 12.1 121 15.7 16.3 96 Larsen Creek 9000 10.5 10.4 101 13.4 -M * South Pass 9040 12.2 12.5 98 10.4 14.5 72 ----- ----- Basin Index (%) 107 85 LOWER N. PLATTE Casper Mtn. 7900 11.5 11.5 100 9.5 11.9 80 Laprele Creek 8375 10.3 8.5 121 10.9 10.1 108 Reno Hill 8400 12.2 11.2 109 13.0 12.0 108 Windy Peak 7900 8.0 6.6 121 8.4 8.5 99 ----- ----- Basin Index (%) 111 98 LARAMIE RIVER Brooklyn Lake 10240 21.2 16.8 126 22.2 17.4 128 Cinnabar Park 9574 18.7 17.8 105 21.0 20.6 102 Crow Creek 8330 4.3 7.1 61 8.2 8.4 98 Deadman Hill 10220 17.7 13.0 136 16.5 14.0 118 Rawah 9020 12.6 9.3 135 15.1 11.5 131 Roach 9700 15.5 13.4 116 18.8 15.9 118 Windy Peak 7900 8.0 6.6 121 8.4 8.5 99 ----- ----- Basin Index (%) 117 114 S. PLATTE Black Mountain 8920 9.2 -M * 10.0 -M * Crow Creek 8330 4.3 7.1 61 8.2 8.4 98 Deadman Hill 10220 17.7 13.0 136 16.5 14.0 118 ----- ----- Basin Index (%) 109 110 LITTLE SNAKE RIVER Battle Mountain 7440 12.7 10.6 120 15.1 12.9 117 Divide Peak 8880 18.0 17.0 106 20.3 18.0 113 Elk River 8700 19.1 16.9 113 17.6 17.1 103 Little Snake River 8915 27.2 20.3 134 33.6 25.8 130 Old Battle 10000 32.5 25.6 127 31.1 29.8 104 Sage Creek Basin 7850 15.9 11.6 137 15.6 12.4 126 Sandstone RS 8150 16.5 11.8 140 17.1 16.0 107 Whiskey Park 8950 -M 23.3 * -M 23.9 * ----- ----- Basin Index (%) 125 114 UPPER GREEN RIVER Big Sandy Opening 9080 12.7 10.8 118 13.4 11.2 120 Blind Bull Sum 8650 20.9 19.4 108 16.9 16.9 100 East Rim Divide 7930 10.1 9.4 107 10.3 10.2 101 Elkhart Park G.S. 9400 11.5 10.1 114 12.2 11.1 110 Gros Ventre Summit 8750 8.6 10.9 79 10.6 10.9 97 Gunsight Pass 9820 12.1 11.6 104 14.0 11.6 121 Indian Creek 9425 19.5 20.3 96 15.6 19.0 82 Kendall R.S. 7740 10.7 10.5 102 11.0 12.5 88 Loomis Park 8240 14.9 12.7 117 15.7 14.9 105 New Fork Lake 8340 9.1 9.0 101 8.4 9.3 90 Pocket Creek 9360 13.1 -M * 13.9 -M * Snyder Basin 8060 10.8 10.6 102 12.3 12.2 101 Spring Creek Divide 9000 20.7 19.6 106 21.3 20.4 104 Triple Peak 8500 21.0 18.6 113 22.9 21.6 106 ----- ----- Basin Index (%) 105 102 LOWER GREEN RIVER Blacks Fork Jct 8869 8.0 -M * 11.0 -M * Buck Pasture 9632 13.4 -M * 16.1 -M * EF Blacks Fork GS 9360 10.6 -M * 8.9 -M * Hams Fork 7840 9.7 10.0 97 10.1 9.6 105 Hewinta 9500 9.9 8.6 115 12.3 11.5 107 Hickerson Park 9122 7.0 6.4 109 9.2 8.1 114 Hole-in-Rock 9168 5.8 6.1 95 8.8 7.6 116 Indian Creek 9425 19.5 20.3 96 15.6 19.0 82 Kelley R.S. 8180 12.8 12.7 101 13.3 15.4 86 Spirit Lk 10235 13.4 -M * 13.8 -M * Steel Creek Park 10158 12.9 12.6 102 15.3 13.3 115 ----- ----- Basin Index (%) 101 100 UPPER BEAR RIVER Bear River RS 8777 10.0 -M * 12.9 -M * Bug Lake 7987 20.8 16.1 129 20.6 16.4 126 Burts Miller Ranch 8000 7.0 -M * 7.4 -M * Chalk Creek #1 9171 22.1 20.0 110 24.4 20.8 117 Hayden Fork 9130 16.2 13.4 121 20.7 17.4 119 Kelley R.S. 8180 12.8 12.7 101 13.3 15.4 86 Lily Lake 9133 10.9 11.1 98 14.1 14.1 100 Monte Cristo 8932 28.5 22.9 124 27.2 21.8 125 Salt River Summit 7640 12.1 11.2 108 13.8 14.2 97 Spring Creek Divide 9000 20.7 19.6 106 21.3 20.4 104 ----- ----- Basin Index (%) 113 111 ----------------------------------------------------------------------------- -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.