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 22 , 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 20.4 19.2 106 Black Bear 8170 40.5 32.9 123 40.0 34.8 115 Blind Bull Sum 8650 21.5 20.7 104 17.3 17.8 97 Cottonwood Creek 7670 19.0 20.2 94 22.6 22.2 102 East Rim Divide 7930 10.3 9.6 107 10.4 10.6 98 Grand Targhee 9260 39.2 33.2 118 29.4 27.2 108 Granite Creek 6770 18.8 14.8 127 19.6 18.2 108 Grassy Lake 7265 31.7 29.6 107 34.7 32.9 105 Gros Ventre Summit 8750 8.5 11.8 72 11.3 11.5 98 Gunsight Pass 9820 12.1 12.2 99 14.1 12.2 116 Lewis Lake Divide 7850 32.8 28.0 117 35.6 32.4 110 Phillips Bench 8200 27.3 22.6 121 29.9 25.5 117 Salt River Summit 7640 12.5 12.1 103 14.3 15.1 95 Snake River Station 6920 19.7 15.4 128 24.2 20.6 117 Spring Creek Divide 9000 21.2 21.5 99 21.8 21.6 101 Thumb Divide 7980 17.7 14.3 124 17.6 16.6 106 Togwotee Pass 9580 21.9 20.8 105 22.7 21.9 104 Two Ocean Plateau 9240 28.1 24.2 116 23.8 24.7 96 Willow Creek 8080 28.3 25.3 112 31.1 30.2 103 Younts Peak 8350 -M 13.6 * -M 14.3 * ----- ----- Basin Index (%) 112 106 MADISON-GALLATIN Black Bear 8170 40.5 32.9 123 40.0 34.8 115 Canyon 7870 12.7 11.8 108 14.6 14.7 99 Madison Plateau 7750 26.2 20.2 130 25.6 23.8 108 West Yellowstone 6700 13.8 10.0 138 16.1 12.8 126 Whiskey Creek 6800 18.6 14.3 130 19.1 18.3 104 ----- ----- Basin Index (%) 125 111 YELLOWSTONE Beartooth Lake 9360 18.6 19.7 94 17.4 17.9 97 Burnt Mtn 5880 8.0 4.7 170 12.1 11.0 110 Canyon 7870 12.7 11.8 108 14.6 14.7 99 Cole Creek 7850 14.2 12.2 116 -M 10.9 * Evening Star 9200 23.9 22.5 106 26.2 24.7 106 Fisher Creek 9100 28.4 28.3 100 31.1 28.8 108 Northeast Entrance 7350 9.7 9.2 105 12.2 11.0 111 Parker Peak 9400 21.8 17.8 122 21.8 15.8 138 Sylvan Lake 8420 19.3 18.3 105 24.8 20.1 123 Thumb Divide 7980 17.7 14.3 124 17.6 16.6 106 Two Ocean Plateau 9240 28.1 24.2 116 23.8 24.7 96 White Mill 8700 20.0 20.2 99 17.7 21.4 83 Wolverine 7650 11.8 8.9 133 11.6 11.1 105 Younts Peak 8350 -M 13.6 * -M 14.3 * ----- ----- Basin Index (%) 110 106 WIND RIVER Burroughs Creek 8750 9.8 -M * 11.9 -M * Castle Creek 8400 3.9 -M * 5.2 -M * Cold Springs 9630 6.3 6.5 97 6.7 8.6 78 Deer Park 9700 14.9 13.7 109 16.3 17.4 94 Hobbs Park 10100 12.9 12.1 107 10.0 11.3 88 Kirwin 9550 9.4 8.5 111 9.9 10.1 98 Little Warm 9370 7.9 9.4 84 8.1 11.3 72 Owl Creek 8975 4.5 4.6 98 5.1 5.1 100 South Pass 9040 12.7 14.2 89 10.7 15.5 69 St. Lawrence Alt 8620 4.3 6.3 68 7.5 7.6 99 Togwotee Pass 9580 21.9 20.8 105 22.7 21.9 104 Townsend Creek 8700 8.3 8.4 99 9.2 10.2 90 ----- ----- Basin Index (%) 99 89 BIGHORN BASIN Bald Mtn. 9380 15.5 16.6 93 11.7 15.0 78 Bear Trap Meadow 8200 7.6 5.2 146 6.6 7.2 92 Bone Springs Div 9350 11.8 14.2 83 10.7 13.6 79 Grave Springs 8550 7.6 8.3 92 8.6 9.1 95 Kirwin 9550 9.4 8.5 111 9.9 10.1 98 Marquette 8760 6.4 -M * 8.0 -M * Middle Powder 7760 8.4 10.1 83 4.6 10.2 45 Owl Creek 8975 4.5 4.6 98 5.1 5.1 100 Powder River Pass 9480 8.9 9.3 96 8.7 11.0 79 Shell Creek 9580 12.3 13.0 95 10.6 12.0 88 Timber Creek 7950 3.2 4.1 78 5.1 6.2 82 ----- ----- Basin Index (%) 95 82 SHOSHONE RIVER Blackwater 9780 21.5 21.0 102 21.8 18.3 119 Evening Star 9200 23.9 22.5 106 26.2 24.7 106 Marquette 8760 6.4 -M * 8.0 -M * Sylvan Lake 8420 19.3 18.3 105 24.8 20.1 123 Sylvan Road 7120 11.3 10.5 108 15.0 15.3 98 Younts Peak 8350 -M 13.6 * -M 14.3 * ----- ----- Basin Index (%) 105 112 POWDER RIVER Bear Trap Meadow 8200 7.6 5.2 146 6.6 7.2 92 Cloud Peak Reservoir 9860 10.9 13.1 83 10.0 11.4 88 Grave Springs 8550 7.6 8.3 92 8.6 9.1 95 Hansen Sawmill 8360 5.0 5.8 86 6.5 7.3 89 Middle Powder 7760 8.4 10.1 83 4.6 10.2 45 Powder River Pass 9480 8.9 9.3 96 8.7 11.0 79 Soldier Park 8720 3.8 -M * 6.2 -M * ----- ----- Basin Index (%) 93 80 TONGUE RIVER Big Goose 7990 7.3 8.0 91 9.1 9.4 97 Bone Springs Div 9350 11.8 14.2 83 10.7 13.6 79 Burgess Junction 7880 7.7 9.7 79 8.0 10.6 75 Dome Lake 8880 8.0 10.4 77 7.3 11.7 62 Little Goose 8870 8.5 -M * 7.1 -M * Sucker Creek 8880 9.9 11.0 90 9.3 12.4 75 Tie Creek 6870 4.5 5.1 88 8.9 9.9 90 ----- ----- Basin Index (%) 84 79 BELLE FOURCHE Blind Park 6890 8.6 7.2 119 7.1 10.6 67 Cole Canyon 5910 6.9 5.6 123 10.7 8.0 134 ----- ----- Basin Index (%) 121 96 CHEYENNE RIVER BASIN Blind Park 6890 8.6 7.2 119 7.1 10.6 67 North Rapid Creek 6130 7.3 6.6 111 6.6 8.7 76 ----- ----- Basin Index (%) 115 71 UPPER N. PLATTE Arapaho Ridge 10960 24.5 18.1 135 24.8 19.8 125 Blackhall Mtn 9820 31.2 -M * 31.4 -M * Columbine 9160 29.1 22.1 132 27.8 23.2 120 Divide Peak 8880 20.4 17.9 114 22.4 19.3 116 Joe Wright 10120 21.1 19.3 109 28.3 23.1 123 Laprele Creek 8375 12.7 9.3 137 13.1 10.9 120 Med Bow 10500 35.7 -M * 32.6 -M * Never Summer 10280 21.4 18.0 119 17.9 -M * North French Creek 10130 29.0 25.8 112 28.6 23.9 120 Old Battle 10000 34.7 26.8 129 35.3 31.8 111 Rawah 9020 14.6 9.7 151 16.9 12.4 136 Sage Creek Basin 7850 17.8 11.5 155 16.0 13.0 123 Sand Lake 10050 27.9 25.1 111 23.9 21.9 109 South Brush Creek 8440 11.6 11.2 104 11.8 13.5 87 Tower 10500 49.1 40.5 121 -M 36.1 * Webber Springs 9250 25.8 21.3 121 30.2 24.1 125 Whiskey Park 8950 30.4 24.5 124 31.4 25.2 125 Willow Creek Pass 9540 15.4 11.0 140 16.5 11.8 140 Zirkel 9340 32.8 25.6 128 35.9 25.6 140 ----- ----- Basin Index (%) 124 121 SWEETWATER Deer Park 9700 14.9 13.7 109 16.3 17.4 94 Larsen Creek 9000 10.9 11.3 96 13.6 -M * South Pass 9040 12.7 14.2 89 10.7 15.5 69 ----- ----- Basin Index (%) 98 82 LOWER N. PLATTE Casper Mtn. 7900 14.3 12.5 114 11.1 12.9 86 Laprele Creek 8375 12.7 9.3 137 13.1 10.9 120 Reno Hill 8400 14.9 12.2 122 15.6 13.2 118 Windy Peak 7900 10.6 7.3 145 10.8 9.2 117 ----- ----- Basin Index (%) 127 110 LARAMIE RIVER Brooklyn Lake 10240 23.3 17.9 130 24.4 18.7 130 Cinnabar Park 9574 19.7 18.4 107 22.3 21.5 104 Crow Creek 8330 5.7 6.9 83 9.7 9.1 107 Deadman Hill 10220 20.0 14.1 142 18.8 15.2 124 Rawah 9020 14.6 9.7 151 16.9 12.4 136 Roach 9700 17.3 14.2 122 20.5 17.1 120 Windy Peak 7900 10.6 7.3 145 10.8 9.2 117 ----- ----- Basin Index (%) 126 120 S. PLATTE Black Mountain 8920 11.2 -M * 12.1 -M * Crow Creek 8330 5.7 6.9 83 9.7 9.1 107 Deadman Hill 10220 20.0 14.1 142 18.8 15.2 124 ----- ----- Basin Index (%) 122 117 LITTLE SNAKE RIVER Battle Mountain 7440 13.4 11.3 119 15.8 13.7 115 Divide Peak 8880 20.4 17.9 114 22.4 19.3 116 Elk River 8700 20.3 17.4 117 18.8 18.1 104 Little Snake River 8915 28.4 21.3 133 36.1 26.7 135 Old Battle 10000 34.7 26.8 129 35.3 31.8 111 Sage Creek Basin 7850 17.8 11.5 155 16.0 13.0 123 Sandstone RS 8150 17.6 12.6 140 18.1 16.8 108 Whiskey Park 8950 30.4 24.5 124 31.4 25.2 125 ----- ----- Basin Index (%) 128 118 UPPER GREEN RIVER Big Sandy Opening 9080 12.9 11.8 109 13.6 11.9 114 Blind Bull Sum 8650 21.5 20.7 104 17.3 17.8 97 East Rim Divide 7930 10.3 9.6 107 10.4 10.6 98 Elkhart Park G.S. 9400 11.8 10.9 108 12.5 11.9 105 Gros Ventre Summit 8750 8.5 11.8 72 11.3 11.5 98 Gunsight Pass 9820 12.1 12.2 99 14.1 12.2 116 Indian Creek 9425 20.0 21.6 93 16.1 20.4 79 Kendall R.S. 7740 10.5 11.4 92 11.1 13.0 85 Loomis Park 8240 15.3 13.6 112 15.8 15.7 101 New Fork Lake 8340 9.2 9.4 98 8.7 9.8 89 Pocket Creek 9360 13.3 -M * 14.0 -M * Snider Basin 8060 11.0 11.1 99 12.7 12.9 98 Spring Creek Divide 9000 21.2 21.5 99 21.8 21.6 101 Triple Peak 8500 21.1 19.8 107 23.1 23.0 100 ----- ----- Basin Index (%) 100 98 LOWER GREEN RIVER Blacks Fork Jct 8869 8.7 -M * 11.5 -M * Buck Pasture 9632 13.9 -M * 16.5 -M * EF Blacks Fork GS 9360 11.2 -M * 9.5 -M * Hams Fork 7840 10.0 10.4 96 10.3 10.3 100 Hewinta 9500 11.7 9.9 118 13.1 12.5 105 Hickerson Park 9122 8.0 6.7 119 10.2 9.0 113 Hole-in-Rock 9168 6.4 6.8 94 9.5 8.4 113 Indian Creek 9425 20.0 21.6 93 16.1 20.4 79 Kelley R.S. 8180 -M 13.7 * -M 16.4 * Spirit Lk 10235 14.3 -M * 14.8 -M * Steel Creek Park 10158 13.5 13.6 99 16.2 14.5 112 ----- ----- Basin Index (%) 101 100 UPPER BEAR RIVER Bear River RS 8777 11.0 -M * 13.7 -M * Bug Lake 7987 21.9 16.9 130 21.3 17.6 121 Burts Miller Ranch 8000 7.7 -M * 7.9 -M * Chalk Creek #1 9171 23.5 21.6 109 27.1 22.4 121 Hayden Fork 9130 16.5 14.4 115 21.3 18.8 113 Kelley R.S. 8180 -M 13.7 * -M 16.4 * Lily Lake 9133 11.8 11.5 103 14.8 15.2 97 Monte Cristo 8932 29.5 24.7 119 28.3 23.4 121 Salt River Summit 7640 12.5 12.1 103 14.3 15.1 95 Spring Creek Divide 9000 21.2 21.5 99 21.8 21.6 101 ----- ----- 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.