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 28 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.8 14.7 121 20.6 19.8 104 Black Bear 8170 41.3 35.0 118 40.7 35.9 113 Blind Bull Sum 8650 22.0 21.5 102 17.7 18.4 96 Cottonwood Creek 7670 19.0 20.8 91 23.3 23.1 101 East Rim Divide 7930 10.4 9.8 106 10.6 11.1 95 Grand Targhee 9260 40.2 35.0 115 30.0 28.5 105 Granite Creek 6770 18.6 14.9 125 19.7 18.8 105 Grassy Lake 7265 32.5 31.0 105 35.3 34.0 104 Gros Ventre Summit 8750 -M 12.4 * -M 12.0 * Gunsight Pass 9820 12.2 13.0 94 14.4 12.8 112 Lewis Lake Divide 7850 33.2 29.2 114 35.9 33.4 107 Phillips Bench 8200 27.9 23.6 118 30.3 26.5 114 Salt River Summit 7640 13.0 12.6 103 14.9 15.7 95 Snake River Station 6920 19.5 15.9 123 24.2 21.3 114 Spring Creek Divide 9000 21.7 22.3 97 22.2 22.5 99 Thumb Divide 7980 18.1 15.1 120 17.7 17.4 102 Togwotee Pass 9580 22.6 21.4 106 23.3 22.8 102 Two Ocean Plateau 9240 28.6 25.2 113 24.1 25.6 94 Willow Creek 8080 29.1 26.6 109 31.8 31.4 101 Younts Peak 8350 -M 13.9 * -M 14.8 * ----- ----- Basin Index (%) 110 104 MADISON-GALLATIN Black Bear 8170 41.3 35.0 118 40.7 35.9 113 Canyon 7870 13.1 12.2 107 14.9 15.1 99 Madison Plateau 7750 26.2 21.0 125 25.8 24.7 104 West Yellowstone 6700 13.3 10.1 132 16.1 13.1 123 Whiskey Creek 6800 18.7 14.7 127 19.3 19.0 102 ----- ----- Basin Index (%) 121 108 YELLOWSTONE Beartooth Lake 9360 18.9 20.5 92 17.5 18.4 95 Burnt Mtn 5880 7.7 4.6 167 12.1 11.5 105 Canyon 7870 13.1 12.2 107 14.9 15.1 99 Cole Creek 7850 14.3 12.9 111 -M 11.6 * Evening Star 9200 24.1 23.6 102 26.6 25.5 104 Fisher Creek 9100 28.8 29.2 99 31.6 29.8 106 Northeast Entrance 7350 9.6 9.7 99 12.4 11.4 109 Parker Peak 9400 22.0 18.4 120 22.4 16.4 137 Sylvan Lake 8420 20.0 18.8 106 25.6 20.8 123 Thumb Divide 7980 18.1 15.1 120 17.7 17.4 102 Two Ocean Plateau 9240 28.6 25.2 113 24.1 25.6 94 White Mill 8700 20.4 21.2 96 17.8 22.2 80 Wolverine 7650 11.3 8.9 127 12.0 11.4 105 Younts Peak 8350 -M 13.9 * -M 14.8 * ----- ----- Basin Index (%) 108 104 WIND RIVER Burroughs Creek 8750 10.0 -M * 12.0 -M * Castle Creek 8400 4.2 -M * 5.4 -M * Cold Springs 9630 6.4 7.0 91 6.8 9.1 75 Deer Park 9700 14.9 14.3 104 16.4 18.0 91 Hobbs Park 10100 13.1 12.9 102 10.0 12.0 83 Kirwin 9550 10.0 9.0 111 10.4 10.6 98 Little Warm 9370 8.3 10.0 83 8.5 11.9 71 Owl Creek 8975 4.4 5.0 88 5.2 5.4 96 South Pass 9040 12.6 14.5 87 10.7 16.1 66 St. Lawrence Alt 8620 4.1 6.6 62 7.6 8.1 94 Togwotee Pass 9580 22.6 21.4 106 23.3 22.8 102 Townsend Creek 8700 8.2 8.8 93 9.5 10.8 88 ----- ----- Basin Index (%) 96 87 BIGHORN BASIN Bald Mtn. 9380 15.7 17.5 90 11.7 15.7 75 Bear Trap Meadow 8200 7.2 5.1 141 6.8 7.6 89 Bone Springs Div 9350 12.3 14.9 83 10.8 14.2 76 Grave Springs 8550 7.7 8.5 91 8.6 9.5 91 Kirwin 9550 10.0 9.0 111 10.4 10.6 98 Marquette 8760 7.0 -M * 8.3 -M * Middle Powder 7760 8.5 10.7 79 4.6 10.6 43 Owl Creek 8975 4.4 5.0 88 5.2 5.4 96 Powder River Pass 9480 8.8 9.7 91 8.3 11.5 72 Shell Creek 9580 12.3 13.9 88 10.7 12.6 85 Timber Creek 7950 3.4 4.4 77 5.3 6.6 80 ----- ----- Basin Index (%) 91 79 SHOSHONE RIVER Blackwater 9780 22.2 21.5 103 22.5 19.1 118 Evening Star 9200 24.1 23.6 102 26.6 25.5 104 Marquette 8760 7.0 -M * 8.3 -M * Sylvan Lake 8420 20.0 18.8 106 25.6 20.8 123 Sylvan Road 7120 11.0 11.0 100 15.2 15.7 97 Younts Peak 8350 -M 13.9 * -M 14.8 * ----- ----- Basin Index (%) 103 111 POWDER RIVER Bear Trap Meadow 8200 7.2 5.1 141 6.8 7.6 89 Cloud Peak Reservoir 9860 11.2 13.6 82 10.1 12.0 84 Grave Springs 8550 7.7 8.5 91 8.6 9.5 91 Hansen Sawmill 8360 5.3 6.1 87 6.8 7.8 87 Middle Powder 7760 8.5 10.7 79 4.6 10.6 43 Powder River Pass 9480 8.8 9.7 91 8.3 11.5 72 Soldier Park 8720 3.9 -M * 6.4 -M * ----- ----- Basin Index (%) 91 77 TONGUE RIVER Big Goose 7990 7.4 8.4 88 9.1 9.8 93 Bone Springs Div 9350 12.3 14.9 83 10.8 14.2 76 Burgess Junction 7880 8.0 10.7 75 8.2 11.2 73 Dome Lake 8880 8.3 11.1 75 7.4 12.3 60 Little Goose 8870 8.5 -M * 7.2 -M * Sucker Creek 8880 10.1 11.2 90 9.5 13.0 73 Tie Creek 6870 4.1 5.4 76 9.1 10.3 88 ----- ----- Basin Index (%) 81 76 BELLE FOURCHE Blind Park 6890 7.1 7.1 100 7.3 10.9 67 Cole Canyon 5910 6.4 5.7 112 10.8 8.4 129 ----- ----- Basin Index (%) 105 94 CHEYENNE RIVER BASIN Blind Park 6890 7.1 7.1 100 7.3 10.9 67 North Rapid Creek 6130 6.5 6.7 97 6.6 9.0 73 ----- ----- Basin Index (%) 99 70 UPPER N. PLATTE Arapaho Ridge 10960 25.3 19.1 132 25.4 20.6 123 Blackhall Mtn 9820 31.5 -M * 32.2 -M * Columbine 9160 30.2 22.1 137 28.2 23.8 118 Divide Peak 8880 21.0 18.9 111 22.5 19.9 113 Joe Wright 10120 21.6 19.8 109 29.1 24.0 121 Laprele Creek 8375 12.5 9.4 133 13.3 11.4 117 Med Bow 10500 36.8 -M * 33.0 -M * Never Summer 10280 22.4 18.9 119 18.5 -M * North French Creek 10130 29.6 27.1 109 29.1 25.0 116 Old Battle 10000 35.2 28.4 124 35.8 32.7 109 Rawah 9020 14.6 10.1 145 17.2 13.0 132 Sage Creek Basin 7850 18.4 12.3 150 16.1 13.4 120 Sand Lake 10050 28.4 26.4 108 24.0 22.9 105 South Brush Creek 8440 11.2 12.0 93 12.0 14.1 85 Tower 10500 49.8 42.3 118 -M 37.3 * Webber Springs 9250 26.0 22.5 116 30.6 24.9 123 Whiskey Park 8950 31.2 24.9 125 31.7 26.2 121 Willow Creek Pass 9540 16.0 11.5 139 17.1 12.3 139 Zirkel 9340 33.0 26.0 127 36.4 26.7 136 ----- ----- Basin Index (%) 121 119 SWEETWATER Deer Park 9700 14.9 14.3 104 16.4 18.0 91 Larsen Creek 9000 10.7 11.9 90 13.6 -M * South Pass 9040 12.6 14.5 87 10.7 16.1 66 ----- ----- Basin Index (%) 94 79 LOWER N. PLATTE Casper Mtn. 7900 14.3 12.8 112 11.3 13.5 84 Laprele Creek 8375 12.5 9.4 133 13.3 11.4 117 Reno Hill 8400 15.2 12.7 120 15.7 14.0 112 Windy Peak 7900 10.5 7.7 136 11.2 9.7 115 ----- ----- Basin Index (%) 123 106 LARAMIE RIVER Brooklyn Lake 10240 23.7 18.9 125 24.7 19.5 127 Cinnabar Park 9574 19.9 19.5 102 22.7 22.6 100 Crow Creek 8330 5.7 6.9 83 9.9 9.8 101 Deadman Hill 10220 20.8 14.9 140 19.4 15.9 122 Rawah 9020 14.6 10.1 145 17.2 13.0 132 Roach 9700 17.3 14.9 116 20.8 17.8 117 Windy Peak 7900 10.5 7.7 136 11.2 9.7 115 ----- ----- Basin Index (%) 121 116 S. PLATTE Black Mountain 8920 11.6 -M * 12.4 -M * Crow Creek 8330 5.7 6.9 83 9.9 9.8 101 Deadman Hill 10220 20.8 14.9 140 19.4 15.9 122 ----- ----- Basin Index (%) 122 114 LITTLE SNAKE RIVER Battle Mountain 7440 12.8 10.9 117 15.9 14.1 113 Divide Peak 8880 21.0 18.9 111 22.5 19.9 113 Elk River 8700 20.0 17.9 112 18.9 18.7 101 Little Snake River 8915 28.9 22.1 131 36.4 27.6 132 Old Battle 10000 35.2 28.4 124 35.8 32.7 109 Sage Creek Basin 7850 18.4 12.3 150 16.1 13.4 120 Sandstone RS 8150 17.1 13.1 131 18.2 17.3 105 Whiskey Park 8950 31.2 24.9 125 31.7 26.2 121 ----- ----- Basin Index (%) 124 115 UPPER GREEN RIVER Big Sandy Opening 9080 13.1 12.1 108 13.7 12.4 110 Blind Bull Sum 8650 22.0 21.5 102 17.7 18.4 96 East Rim Divide 7930 10.4 9.8 106 10.6 11.1 95 Elkhart Park G.S. 9400 12.0 11.6 103 12.7 12.4 102 Gros Ventre Summit 8750 -M 12.4 * -M 12.0 * Gunsight Pass 9820 12.2 13.0 94 14.4 12.8 112 Indian Creek 9425 20.9 23.0 91 16.8 21.1 80 Kendall R.S. 7740 10.5 11.3 93 11.1 13.5 82 Loomis Park 8240 15.2 14.4 106 16.1 16.3 99 New Fork Lake 8340 9.3 10.0 93 8.8 10.2 86 Pocket Creek 9360 13.8 -M * 14.4 -M * Snider Basin 8060 11.3 11.7 97 12.9 13.3 97 Spring Creek Divide 9000 21.7 22.3 97 22.2 22.5 99 Triple Peak 8500 21.9 20.9 105 23.6 23.8 99 ----- ----- Basin Index (%) 99 96 LOWER GREEN RIVER Blacks Fork Jct 8869 8.9 -M * 11.8 -M * Buck Pasture 9632 14.3 -M * 17.0 -M * EF Blacks Fork GS 9360 11.3 -M * 9.9 -M * Hams Fork 7840 10.3 10.6 97 10.6 10.7 99 Hewinta 9500 12.3 10.2 121 13.6 13.0 105 Hickerson Park 9122 8.5 7.1 120 10.6 9.3 114 Hole-in-Rock 9168 6.3 7.0 90 9.7 8.8 110 Indian Creek 9425 20.9 23.0 91 16.8 21.1 80 Kelley R.S. 8180 14.3 14.5 99 14.6 17.0 86 Spirit Lk 10235 15.2 -M * 15.6 -M * Steel Creek Park 10158 13.9 14.4 97 16.8 15.1 111 ----- ----- Basin Index (%) 100 98 UPPER BEAR RIVER Bear River RS 8777 10.8 -M * 13.8 -M * Bug Lake 7987 22.8 17.7 129 22.0 18.2 121 Burts Miller Ranch 8000 7.0 -M * 8.0 -M * Chalk Creek #1 9171 23.9 22.6 106 27.6 23.5 117 Hayden Fork 9130 16.5 14.7 112 21.6 19.6 110 Kelley R.S. 8180 14.3 14.5 99 14.6 17.0 86 Lily Lake 9133 11.9 11.8 101 15.1 15.9 95 Monte Cristo 8932 30.7 25.4 121 29.1 24.3 120 Salt River Summit 7640 13.0 12.6 103 14.9 15.7 95 Spring Creek Divide 9000 21.7 22.3 97 22.2 22.5 99 ----- ----- Basin Index (%) 109 107 ----------------------------------------------------------------------------- -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.