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 SATURDAY: MARCH 23 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.9 14.6 123 20.4 19.2 106 Black Bear 8170 40.6 33.1 123 40.2 34.9 115 Blind Bull Sum 8650 21.5 20.8 103 17.4 17.9 97 Cottonwood Creek 7670 19.1 20.3 94 22.7 22.3 102 East Rim Divide 7930 10.3 9.6 107 10.4 10.7 97 Grand Targhee 9260 39.3 33.4 118 29.4 27.4 107 Granite Creek 6770 18.8 14.7 128 19.6 18.3 107 Grassy Lake 7265 31.7 29.7 107 34.7 33.1 105 Gros Ventre Summit 8750 -M 11.8 * -M 11.6 * Gunsight Pass 9820 12.0 12.3 98 14.1 12.2 116 Lewis Lake Divide 7850 32.7 28.2 116 35.7 32.5 110 Phillips Bench 8200 27.3 22.8 120 29.9 25.6 117 Salt River Summit 7640 12.7 12.2 104 14.4 15.2 95 Snake River Station 6920 19.4 15.5 125 24.3 20.6 118 Spring Creek Divide 9000 21.2 21.6 98 21.9 21.8 100 Thumb Divide 7980 17.8 14.4 124 17.6 16.7 105 Togwotee Pass 9580 22.1 20.9 106 22.7 22.0 103 Two Ocean Plateau 9240 28.1 24.4 115 23.8 24.8 96 Willow Creek 8080 28.3 25.3 112 31.2 30.4 103 Younts Peak 8350 -M 13.6 * -M 14.3 * ----- ----- Basin Index (%) 113 106 MADISON-GALLATIN Black Bear 8170 40.6 33.1 123 40.2 34.9 115 Canyon 7870 12.7 11.8 108 14.7 14.7 100 Madison Plateau 7750 26.2 20.4 128 25.7 23.9 108 West Yellowstone 6700 13.7 10.0 137 16.1 12.8 126 Whiskey Creek 6800 18.6 14.4 129 19.1 18.3 104 ----- ----- Basin Index (%) 125 111 YELLOWSTONE Beartooth Lake 9360 18.6 19.8 94 17.5 18.0 97 Burnt Mtn 5880 7.9 4.7 168 12.1 11.0 110 Canyon 7870 12.7 11.8 108 14.7 14.7 100 Cole Creek 7850 14.1 12.3 115 -M 11.0 * Evening Star 9200 23.7 22.7 104 26.3 24.8 106 Fisher Creek 9100 28.3 28.4 100 31.2 28.9 108 Northeast Entrance 7350 9.6 9.3 103 12.2 11.1 110 Parker Peak 9400 21.7 17.9 121 21.8 15.9 137 Sylvan Lake 8420 19.2 18.4 104 24.7 20.2 122 Thumb Divide 7980 17.8 14.4 124 17.6 16.7 105 Two Ocean Plateau 9240 28.1 24.4 115 23.8 24.8 96 White Mill 8700 19.9 20.4 98 17.7 21.5 82 Wolverine 7650 11.5 8.9 129 11.7 11.1 105 Younts Peak 8350 -M 13.6 * -M 14.3 * ----- ----- Basin Index (%) 109 106 WIND RIVER Burroughs Creek 8750 10.0 -M * 11.8 -M * Castle Creek 8400 3.9 -M * 5.2 -M * Cold Springs 9630 6.4 6.6 97 6.7 8.7 77 Deer Park 9700 15.0 13.9 108 16.3 17.4 94 Hobbs Park 10100 13.0 12.2 107 9.9 11.3 88 Kirwin 9550 9.4 8.5 111 9.9 10.2 97 Little Warm 9370 8.0 9.4 85 8.0 11.3 71 Owl Creek 8975 4.4 4.7 94 5.1 5.1 100 South Pass 9040 12.7 14.3 89 10.7 15.5 69 St. Lawrence Alt 8620 4.2 6.4 66 7.5 7.7 97 Togwotee Pass 9580 22.1 20.9 106 22.7 22.0 103 Townsend Creek 8700 8.2 8.5 96 9.2 10.2 90 ----- ----- Basin Index (%) 98 89 BIGHORN BASIN Bald Mtn. 9380 15.5 16.6 93 11.7 15.1 77 Bear Trap Meadow 8200 7.5 5.2 144 6.7 7.3 92 Bone Springs Div 9350 12.0 14.2 85 10.7 13.6 79 Grave Springs 8550 7.6 8.3 92 8.6 9.2 93 Kirwin 9550 9.4 8.5 111 9.9 10.2 97 Marquette 8760 6.7 -M * 7.9 -M * Middle Powder 7760 8.5 10.2 83 4.6 10.3 45 Owl Creek 8975 4.4 4.7 94 5.1 5.1 100 Powder River Pass 9480 9.0 9.4 96 8.8 11.1 79 Shell Creek 9580 12.3 13.1 94 10.6 12.1 88 Timber Creek 7950 3.2 4.1 78 5.1 6.3 81 ----- ----- Basin Index (%) 95 82 SHOSHONE RIVER Blackwater 9780 21.4 21.0 102 21.8 18.4 118 Evening Star 9200 23.7 22.7 104 26.3 24.8 106 Marquette 8760 6.7 -M * 7.9 -M * Sylvan Lake 8420 19.2 18.4 104 24.7 20.2 122 Sylvan Road 7120 11.2 10.6 106 15.1 15.3 99 Younts Peak 8350 -M 13.6 * -M 14.3 * ----- ----- Basin Index (%) 104 112 POWDER RIVER Bear Trap Meadow 8200 7.5 5.2 144 6.7 7.3 92 Cloud Peak Reservoir 9860 11.0 13.2 83 10.1 11.5 88 Grave Springs 8550 7.6 8.3 92 8.6 9.2 93 Hansen Sawmill 8360 4.9 5.8 84 6.5 7.4 88 Middle Powder 7760 8.5 10.2 83 4.6 10.3 45 Powder River Pass 9480 9.0 9.4 96 8.8 11.1 79 Soldier Park 8720 3.8 -M * 6.3 -M * ----- ----- Basin Index (%) 93 80 TONGUE RIVER Big Goose 7990 7.5 8.0 94 9.1 9.4 97 Bone Springs Div 9350 12.0 14.2 85 10.7 13.6 79 Burgess Junction 7880 7.7 9.8 79 8.0 10.7 75 Dome Lake 8880 8.1 10.5 77 7.3 11.7 62 Little Goose 8870 8.6 -M * 7.1 -M * Sucker Creek 8880 9.9 11.0 90 9.4 12.5 75 Tie Creek 6870 4.5 5.1 88 8.9 9.9 90 ----- ----- Basin Index (%) 85 79 BELLE FOURCHE Blind Park 6890 8.2 7.1 115 7.2 10.6 68 Cole Canyon 5910 6.7 5.6 120 10.7 8.0 134 ----- ----- Basin Index (%) 117 96 CHEYENNE RIVER BASIN Blind Park 6890 8.2 7.1 115 7.2 10.6 68 North Rapid Creek 6130 7.1 6.6 108 6.6 8.7 76 ----- ----- Basin Index (%) 112 72 UPPER N. PLATTE Arapaho Ridge 10960 24.7 18.2 136 24.9 19.9 125 Blackhall Mtn 9820 31.4 -M * 31.5 -M * Columbine 9160 29.0 22.1 131 27.8 23.3 119 Divide Peak 8880 20.3 18.0 113 22.4 19.4 115 Joe Wright 10120 21.3 19.3 110 28.7 23.2 124 Laprele Creek 8375 12.7 9.3 137 13.1 11.0 119 Med Bow 10500 36.0 -M * 32.6 -M * Never Summer 10280 21.8 18.2 120 18.2 -M * North French Creek 10130 28.8 26.1 110 28.7 24.0 120 Old Battle 10000 34.8 27.1 128 35.3 31.9 111 Rawah 9020 14.9 9.7 154 17.1 12.4 138 Sage Creek Basin 7850 17.7 11.6 153 16.0 13.0 123 Sand Lake 10050 27.9 25.3 110 23.9 22.0 109 South Brush Creek 8440 11.5 11.3 102 11.9 13.6 88 Tower 10500 49.2 40.7 121 -M 36.2 * Webber Springs 9250 25.8 21.5 120 30.2 24.2 125 Whiskey Park 8950 -M 24.5 * -M 25.3 * Willow Creek Pass 9540 15.8 11.1 142 16.7 11.9 140 Zirkel 9340 32.8 25.5 129 36.0 25.6 141 ----- ----- Basin Index (%) 123 121 SWEETWATER Deer Park 9700 15.0 13.9 108 16.3 17.4 94 Larsen Creek 9000 10.3 11.4 90 13.5 -M * South Pass 9040 12.7 14.3 89 10.7 15.5 69 ----- ----- Basin Index (%) 96 82 LOWER N. PLATTE Casper Mtn. 7900 14.3 12.6 113 11.1 13.0 85 Laprele Creek 8375 12.7 9.3 137 13.1 11.0 119 Reno Hill 8400 14.9 12.3 121 15.6 13.2 118 Windy Peak 7900 10.6 7.4 143 10.9 9.2 118 ----- ----- Basin Index (%) 126 109 LARAMIE RIVER Brooklyn Lake 10240 23.5 18.0 131 24.5 18.8 130 Cinnabar Park 9574 19.7 18.7 105 22.5 21.6 104 Crow Creek 8330 5.8 6.9 84 9.8 9.1 108 Deadman Hill 10220 20.5 14.2 144 19.2 15.2 126 Rawah 9020 14.9 9.7 154 17.1 12.4 138 Roach 9700 17.4 14.3 122 20.6 17.1 120 Windy Peak 7900 10.6 7.4 143 10.9 9.2 118 ----- ----- Basin Index (%) 126 121 S. PLATTE Black Mountain 8920 11.6 -M * 12.4 -M * Crow Creek 8330 5.8 6.9 84 9.8 9.1 108 Deadman Hill 10220 20.5 14.2 144 19.2 15.2 126 ----- ----- Basin Index (%) 125 119 LITTLE SNAKE RIVER Battle Mountain 7440 13.3 11.3 118 15.8 13.7 115 Divide Peak 8880 20.3 18.0 113 22.4 19.4 115 Elk River 8700 20.2 17.5 115 18.9 18.2 104 Little Snake River 8915 28.3 21.4 132 36.1 26.8 135 Old Battle 10000 34.8 27.1 128 35.3 31.9 111 Sage Creek Basin 7850 17.7 11.6 153 16.0 13.0 123 Sandstone RS 8150 17.4 12.7 137 18.1 16.9 107 Whiskey Park 8950 -M 24.5 * -M 25.3 * ----- ----- Basin Index (%) 127 116 UPPER GREEN RIVER Big Sandy Opening 9080 12.8 11.9 108 13.5 12.0 112 Blind Bull Sum 8650 21.5 20.8 103 17.4 17.9 97 East Rim Divide 7930 10.3 9.6 107 10.4 10.7 97 Elkhart Park G.S. 9400 11.8 11.0 107 12.5 12.0 104 Gros Ventre Summit 8750 -M 11.8 * -M 11.6 * Gunsight Pass 9820 12.0 12.3 98 14.1 12.2 116 Indian Creek 9425 20.2 21.8 93 16.3 20.5 80 Kendall R.S. 7740 10.4 11.4 91 11.1 13.1 85 Loomis Park 8240 15.3 13.7 112 15.8 15.7 101 New Fork Lake 8340 9.2 9.5 97 8.7 9.8 89 Pocket Creek 9360 13.2 -M * 14.0 -M * Snider Basin 8060 11.1 11.2 99 12.7 12.9 98 Spring Creek Divide 9000 21.2 21.6 98 21.9 21.8 100 Triple Peak 8500 21.3 20.0 106 23.3 23.1 101 ----- ----- Basin Index (%) 101 98 LOWER GREEN RIVER Blacks Fork Jct 8869 8.8 -M * 11.8 -M * Buck Pasture 9632 14.2 -M * 16.7 -M * EF Blacks Fork GS 9360 11.5 -M * 9.8 -M * Hams Fork 7840 10.2 10.5 97 10.4 10.3 101 Hewinta 9500 11.9 9.9 120 13.5 12.6 107 Hickerson Park 9122 8.1 6.8 119 10.4 9.1 114 Hole-in-Rock 9168 6.5 6.8 96 9.6 8.5 113 Indian Creek 9425 20.2 21.8 93 16.3 20.5 80 Kelley R.S. 8180 -M 13.8 * -M 16.5 * Spirit Lk 10235 14.8 -M * 15.2 -M * Steel Creek Park 10158 14.1 13.7 103 16.7 14.6 114 ----- ----- Basin Index (%) 102 102 UPPER BEAR RIVER Bear River RS 8777 11.2 -M * 13.8 -M * Bug Lake 7987 22.4 17.0 132 21.7 17.7 123 Burts Miller Ranch 8000 7.7 -M * 7.9 -M * Chalk Creek #1 9171 23.6 21.9 108 27.2 22.6 120 Hayden Fork 9130 16.4 14.5 113 21.5 18.9 114 Kelley R.S. 8180 -M 13.8 * -M 16.5 * Lily Lake 9133 11.9 11.5 103 15.0 15.3 98 Monte Cristo 8932 29.9 24.9 120 28.5 23.5 121 Salt River Summit 7640 12.7 12.2 104 14.4 15.2 95 Spring Creek Divide 9000 21.2 21.6 98 21.9 21.8 100 ----- ----- 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.