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: MARCH 27 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 18.0 14.7 122 20.6 19.7 105 Black Bear 8170 41.4 34.6 120 40.7 35.6 114 Blind Bull Sum 8650 21.8 21.3 102 17.7 18.3 97 Cottonwood Creek 7670 19.0 20.6 92 23.2 23.0 101 East Rim Divide 7930 10.5 9.8 107 10.5 11.0 95 Grand Targhee 9260 40.2 34.6 116 30.0 28.3 106 Granite Creek 6770 18.7 14.8 126 19.7 18.7 105 Grassy Lake 7265 32.4 30.8 105 35.2 33.9 104 Gros Ventre Summit 8750 -M 12.2 * -M 11.9 * Gunsight Pass 9820 12.3 12.9 95 14.3 12.7 113 Lewis Lake Divide 7850 33.2 29.0 114 35.7 33.2 108 Phillips Bench 8200 27.7 23.4 118 30.3 26.4 115 Salt River Summit 7640 13.2 12.5 106 14.8 15.6 95 Snake River Station 6920 20.0 15.8 127 24.2 21.1 115 Spring Creek Divide 9000 21.6 22.2 97 22.2 22.3 100 Thumb Divide 7980 18.1 15.1 120 17.7 17.2 103 Togwotee Pass 9580 22.8 21.3 107 23.3 22.6 103 Two Ocean Plateau 9240 28.4 25.0 114 24.1 25.4 95 Willow Creek 8080 29.2 26.2 111 31.8 31.2 102 Younts Peak 8350 -M 13.8 * -M 14.7 * ----- ----- Basin Index (%) 111 105 MADISON-GALLATIN Black Bear 8170 41.4 34.6 120 40.7 35.6 114 Canyon 7870 13.1 12.1 108 14.9 15.0 99 Madison Plateau 7750 26.4 20.8 127 25.8 24.5 105 West Yellowstone 6700 13.5 10.1 134 16.1 13.1 123 Whiskey Creek 6800 18.7 14.6 128 19.2 18.8 102 ----- ----- Basin Index (%) 123 109 YELLOWSTONE Beartooth Lake 9360 18.8 20.4 92 17.5 18.4 95 Burnt Mtn 5880 7.8 4.7 166 12.2 11.4 107 Canyon 7870 13.1 12.1 108 14.9 15.0 99 Cole Creek 7850 14.3 12.8 112 -M 11.4 * Evening Star 9200 24.1 23.5 103 26.6 25.4 105 Fisher Creek 9100 28.8 28.9 100 31.6 29.6 107 Northeast Entrance 7350 9.6 9.7 99 12.4 11.4 109 Parker Peak 9400 22.1 18.3 121 22.4 16.3 137 Sylvan Lake 8420 20.0 18.8 106 25.6 20.7 124 Thumb Divide 7980 18.1 15.1 120 17.7 17.2 103 Two Ocean Plateau 9240 28.4 25.0 114 24.1 25.4 95 White Mill 8700 20.4 21.1 97 17.8 22.0 81 Wolverine 7650 11.3 8.9 127 11.9 11.3 105 Younts Peak 8350 -M 13.8 * -M 14.7 * ----- ----- Basin Index (%) 108 105 WIND RIVER Burroughs Creek 8750 10.1 -M * 12.0 -M * Castle Creek 8400 4.3 -M * 5.4 -M * Cold Springs 9630 6.5 6.9 94 6.7 9.0 74 Deer Park 9700 14.7 14.2 104 16.4 17.9 92 Hobbs Park 10100 13.0 12.8 102 9.9 11.8 84 Kirwin 9550 10.0 8.9 112 10.4 10.5 99 Little Warm 9370 8.3 9.9 84 8.3 11.8 70 Owl Creek 8975 4.5 4.8 94 5.2 5.4 96 South Pass 9040 12.7 14.4 88 10.7 16.0 67 St. Lawrence Alt 8620 4.2 6.6 64 7.6 8.0 95 Togwotee Pass 9580 22.8 21.3 107 23.3 22.6 103 Townsend Creek 8700 8.3 8.7 95 9.4 10.6 89 ----- ----- Basin Index (%) 97 87 BIGHORN BASIN Bald Mtn. 9380 15.7 17.3 91 11.7 15.5 75 Bear Trap Meadow 8200 7.3 5.1 143 6.7 7.6 88 Bone Springs Div 9350 12.2 14.7 83 10.8 14.1 77 Grave Springs 8550 7.7 8.4 92 8.6 9.4 91 Kirwin 9550 10.0 8.9 112 10.4 10.5 99 Marquette 8760 6.9 -M * 8.3 -M * Middle Powder 7760 8.7 10.6 82 4.7 10.6 44 Owl Creek 8975 4.5 4.8 94 5.2 5.4 96 Powder River Pass 9480 8.9 9.6 93 8.3 11.4 73 Shell Creek 9580 12.3 13.7 90 10.7 12.5 86 Timber Creek 7950 3.4 4.3 79 5.3 6.5 82 ----- ----- Basin Index (%) 93 80 SHOSHONE RIVER Blackwater 9780 22.2 21.4 104 22.5 18.9 119 Evening Star 9200 24.1 23.5 103 26.6 25.4 105 Marquette 8760 6.9 -M * 8.3 -M * Sylvan Lake 8420 20.0 18.8 106 25.6 20.7 124 Sylvan Road 7120 11.2 10.9 103 15.2 15.7 97 Younts Peak 8350 -M 13.8 * -M 14.7 * ----- ----- Basin Index (%) 104 111 POWDER RIVER Bear Trap Meadow 8200 7.3 5.1 143 6.7 7.6 88 Cloud Peak Reservoir 9860 11.3 13.5 84 10.0 11.9 84 Grave Springs 8550 7.7 8.4 92 8.6 9.4 91 Hansen Sawmill 8360 5.3 6.1 87 6.8 7.7 88 Middle Powder 7760 8.7 10.6 82 4.7 10.6 44 Powder River Pass 9480 8.9 9.6 93 8.3 11.4 73 Soldier Park 8720 3.9 -M * 6.4 -M * ----- ----- Basin Index (%) 92 77 TONGUE RIVER Big Goose 7990 7.5 8.3 90 9.1 9.8 93 Bone Springs Div 9350 12.2 14.7 83 10.8 14.1 77 Burgess Junction 7880 8.0 10.5 76 8.2 11.1 74 Dome Lake 8880 8.3 11.0 75 7.4 12.2 61 Little Goose 8870 8.5 -M * 7.2 -M * Sucker Creek 8880 10.2 11.1 92 9.5 12.9 74 Tie Creek 6870 4.3 5.3 81 9.2 10.2 90 ----- ----- Basin Index (%) 83 77 BELLE FOURCHE Blind Park 6890 7.6 7.1 107 7.3 10.8 68 Cole Canyon 5910 6.5 5.7 114 10.8 8.3 130 ----- ----- Basin Index (%) 110 95 CHEYENNE RIVER BASIN Blind Park 6890 7.6 7.1 107 7.3 10.8 68 North Rapid Creek 6130 6.6 6.7 99 6.6 8.9 74 ----- ----- Basin Index (%) 103 71 UPPER N. PLATTE Arapaho Ridge 10960 25.2 18.9 133 25.4 20.5 124 Blackhall Mtn 9820 31.9 -M * 32.1 -M * Columbine 9160 30.0 22.0 136 28.2 23.8 118 Divide Peak 8880 20.6 18.8 110 22.5 19.8 114 Joe Wright 10120 21.8 19.7 111 29.1 23.8 122 Laprele Creek 8375 12.8 9.4 136 13.2 11.4 116 Med Bow 10500 36.8 -M * 32.9 -M * Never Summer 10280 22.3 18.7 119 18.5 -M * North French Creek 10130 29.5 27.0 109 29.0 24.8 117 Old Battle 10000 35.1 28.1 125 35.7 32.5 110 Rawah 9020 14.8 10.0 148 17.2 12.9 133 Sage Creek Basin 7850 18.4 12.2 151 16.1 13.4 120 Sand Lake 10050 28.4 26.1 109 24.0 22.7 106 South Brush Creek 8440 11.7 11.8 99 12.0 14.0 86 Tower 10500 49.8 41.9 119 -M 37.1 * Webber Springs 9250 26.1 22.3 117 30.6 24.8 123 Whiskey Park 8950 31.2 24.8 126 31.7 26.0 122 Willow Creek Pass 9540 16.1 11.4 141 17.1 12.2 140 Zirkel 9340 33.2 25.9 128 36.4 26.5 137 ----- ----- Basin Index (%) 122 119 SWEETWATER Deer Park 9700 14.7 14.2 104 16.4 17.9 92 Larsen Creek 9000 10.8 11.8 92 13.7 -M * South Pass 9040 12.7 14.4 88 10.7 16.0 67 ----- ----- Basin Index (%) 95 80 LOWER N. PLATTE Casper Mtn. 7900 14.5 12.8 113 11.3 13.4 84 Laprele Creek 8375 12.8 9.4 136 13.2 11.4 116 Reno Hill 8400 15.2 12.6 121 15.7 13.8 114 Windy Peak 7900 10.7 7.7 139 11.2 9.6 117 ----- ----- Basin Index (%) 125 107 LARAMIE RIVER Brooklyn Lake 10240 23.8 18.7 127 24.6 19.3 127 Cinnabar Park 9574 20.1 19.5 103 22.8 22.4 102 Crow Creek 8330 5.9 6.9 86 9.9 9.7 102 Deadman Hill 10220 20.7 14.8 140 19.4 15.8 123 Rawah 9020 14.8 10.0 148 17.2 12.9 133 Roach 9700 17.5 14.7 119 20.8 17.6 118 Windy Peak 7900 10.7 7.7 139 11.2 9.6 117 ----- ----- Basin Index (%) 123 117 S. PLATTE Black Mountain 8920 11.6 -M * 12.4 -M * Crow Creek 8330 5.9 6.9 86 9.9 9.7 102 Deadman Hill 10220 20.7 14.8 140 19.4 15.8 123 ----- ----- Basin Index (%) 123 115 LITTLE SNAKE RIVER Battle Mountain 7440 13.0 11.0 118 15.9 14.0 114 Divide Peak 8880 20.6 18.8 110 22.5 19.8 114 Elk River 8700 20.3 17.8 114 18.9 18.6 102 Little Snake River 8915 29.1 21.9 133 36.4 27.5 132 Old Battle 10000 35.1 28.1 125 35.7 32.5 110 Sage Creek Basin 7850 18.4 12.2 151 16.1 13.4 120 Sandstone RS 8150 17.4 13.0 134 18.2 17.2 106 Whiskey Park 8950 31.2 24.8 126 31.7 26.0 122 ----- ----- Basin Index (%) 125 116 UPPER GREEN RIVER Big Sandy Opening 9080 12.9 12.0 108 13.7 12.3 111 Blind Bull Sum 8650 21.8 21.3 102 17.7 18.3 97 East Rim Divide 7930 10.5 9.8 107 10.5 11.0 95 Elkhart Park G.S. 9400 11.9 11.5 103 12.6 12.3 102 Gros Ventre Summit 8750 -M 12.2 * -M 11.9 * Gunsight Pass 9820 12.3 12.9 95 14.3 12.7 113 Indian Creek 9425 21.0 22.7 93 16.7 21.0 80 Kendall R.S. 7740 10.5 11.3 93 11.1 13.5 82 Loomis Park 8240 15.3 14.3 107 16.0 16.2 99 New Fork Lake 8340 9.3 9.9 94 8.8 10.1 87 Pocket Creek 9360 13.7 -M * 14.4 -M * Snider Basin 8060 11.3 11.5 98 12.8 13.2 97 Spring Creek Divide 9000 21.6 22.2 97 22.2 22.3 100 Triple Peak 8500 21.8 20.7 105 23.5 23.7 99 ----- ----- Basin Index (%) 100 96 LOWER GREEN RIVER Blacks Fork Jct 8869 9.2 -M * 11.8 -M * Buck Pasture 9632 14.3 -M * 17.1 -M * EF Blacks Fork GS 9360 11.5 -M * 9.9 -M * Hams Fork 7840 10.6 10.6 100 10.6 10.6 100 Hewinta 9500 12.3 10.0 123 13.5 12.9 105 Hickerson Park 9122 8.5 7.0 121 10.5 9.3 113 Hole-in-Rock 9168 6.7 6.9 97 9.7 8.7 111 Indian Creek 9425 21.0 22.7 93 16.7 21.0 80 Kelley R.S. 8180 14.3 14.4 99 14.6 17.0 86 Spirit Lk 10235 15.2 -M * 15.6 -M * Steel Creek Park 10158 15.1 14.2 106 16.8 15.0 112 ----- ----- Basin Index (%) 103 98 UPPER BEAR RIVER Bear River RS 8777 11.3 -M * 13.8 -M * Bug Lake 7987 22.8 17.6 130 22.0 18.1 122 Burts Miller Ranch 8000 7.5 -M * 8.0 -M * Chalk Creek #1 9171 23.9 22.4 107 27.6 23.2 119 Hayden Fork 9130 16.8 14.6 115 21.7 19.4 112 Kelley R.S. 8180 14.3 14.4 99 14.6 17.0 86 Lily Lake 9133 12.1 11.8 103 15.0 15.7 96 Monte Cristo 8932 30.7 25.3 121 29.1 24.2 120 Salt River Summit 7640 13.2 12.5 106 14.8 15.6 95 Spring Creek Divide 9000 21.6 22.2 97 22.2 22.3 100 ----- ----- Basin Index (%) 110 107 ----------------------------------------------------------------------------- -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.