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 4 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 17.1 13.6 126 19.0 17.5 109 Black Bear 8170 37.8 30.1 126 37.4 31.6 118 Blind Bull Sum 8650 19.3 18.3 105 15.7 16.3 96 Cottonwood Creek 7670 17.8 17.4 102 20.6 19.9 104 East Rim Divide 7930 9.3 8.5 109 9.5 9.7 98 Grand Targhee 9260 36.5 30.6 119 27.5 25.2 109 Granite Creek 6770 17.0 14.0 121 18.2 16.8 108 Grassy Lake 7265 28.9 26.6 109 32.2 30.0 107 Gros Ventre Summit 8750 8.3 10.1 82 9.9 10.3 96 Gunsight Pass 9820 11.3 10.8 105 13.2 11.0 120 Lewis Lake Divide 7850 30.2 25.4 119 30.2 29.4 103 Phillips Bench 8200 25.4 20.0 127 -M 23.2 * Salt River Summit 7640 11.1 10.7 104 12.9 13.7 94 Snake River Station 6920 18.2 14.4 126 22.6 18.9 120 Spring Creek Divide 9000 19.2 19.0 101 19.8 19.6 101 Thumb Divide 7980 15.9 12.4 128 15.7 15.0 105 Togwotee Pass 9580 21.1 18.3 115 21.6 19.8 109 Two Ocean Plateau 9240 26.3 21.8 121 21.1 22.1 95 Willow Creek 8080 25.1 22.9 110 28.6 27.3 105 Younts Peak 8350 -M 11.8 * -M 12.9 * ----- ----- Basin Index (%) 115 106 MADISON-GALLATIN Black Bear 8170 37.8 30.1 126 37.4 31.6 118 Canyon 7870 11.7 10.8 108 13.4 13.3 101 Madison Plateau 7750 24.6 18.1 136 23.7 21.7 109 West Yellowstone 6700 13.1 9.1 144 14.8 11.9 124 Whiskey Creek 6800 16.9 12.2 139 17.5 16.6 105 ----- ----- Basin Index (%) 130 112 YELLOWSTONE Beartooth Lake 9360 17.3 17.3 100 15.8 16.0 99 Burnt Mtn 5880 7.6 4.1 185 11.7 9.7 121 Canyon 7870 11.7 10.8 108 13.4 13.3 101 Cole Creek 7850 13.1 10.4 126 -M 9.3 * Evening Star 9200 22.7 19.6 116 24.6 22.5 109 Fisher Creek 9100 26.6 26.1 102 29.1 26.0 112 Northeast Entrance 7350 9.6 8.4 114 11.4 10.0 114 Parker Peak 9400 20.3 16.2 125 20.2 14.3 141 Sylvan Lake 8420 18.2 16.1 113 23.3 18.3 127 Thumb Divide 7980 15.9 12.4 128 15.7 15.0 105 Two Ocean Plateau 9240 26.3 21.8 121 21.1 22.1 95 White Mill 8700 18.6 18.6 100 16.2 19.3 84 Wolverine 7650 11.1 8.6 129 10.7 10.1 106 Younts Peak 8350 -M 11.8 * -M 12.9 * ----- ----- Basin Index (%) 115 108 WIND RIVER Burroughs Creek 8750 9.4 -M * 10.7 -M * Castle Creek 8400 3.6 -M * 4.8 -M * Cold Springs 9630 5.5 5.6 98 5.9 7.6 78 Deer Park 9700 14.0 10.9 128 14.9 15.5 96 Hobbs Park 10100 11.5 10.0 115 8.3 9.7 86 Kirwin 9550 8.6 7.2 119 8.7 8.9 98 Little Warm 9370 7.1 8.2 87 6.4 10.0 64 Owl Creek 8975 4.1 4.0 102 4.4 4.4 100 South Pass 9040 11.6 11.8 98 10.0 13.7 73 St. Lawrence Alt 8620 3.1 5.4 57 6.9 6.6 105 Togwotee Pass 9580 21.1 18.3 115 21.6 19.8 109 Townsend Creek 8700 7.2 6.8 106 8.0 8.8 91 ----- ----- Basin Index (%) 106 91 BIGHORN BASIN Bald Mtn. 9380 14.4 15.2 95 10.0 13.3 75 Bear Trap Meadow 8200 6.4 4.5 142 5.3 6.3 84 Bone Springs Div 9350 11.1 12.5 89 9.1 12.0 76 Grave Springs 8550 5.8 7.1 82 6.6 8.0 82 Kirwin 9550 8.6 7.2 119 8.7 8.9 98 Marquette 8760 5.7 -M * 7.1 -M * Middle Powder 7760 7.0 8.3 84 3.5 8.9 39 Owl Creek 8975 4.1 4.0 102 4.4 4.4 100 Powder River Pass 9480 8.4 8.1 104 7.6 9.8 78 Shell Creek 9580 11.2 11.9 94 9.4 10.8 87 Timber Creek 7950 2.9 3.9 74 4.9 5.4 91 ----- ----- Basin Index (%) 97 79 SHOSHONE RIVER Blackwater 9780 19.9 17.7 112 20.1 16.4 123 Evening Star 9200 22.7 19.6 116 24.6 22.5 109 Marquette 8760 5.7 -M * 7.1 -M * Sylvan Lake 8420 18.2 16.1 113 23.3 18.3 127 Sylvan Road 7120 10.9 9.7 112 14.2 14.1 101 Younts Peak 8350 -M 11.8 * -M 12.9 * ----- ----- Basin Index (%) 114 115 POWDER RIVER Bear Trap Meadow 8200 6.4 4.5 142 5.3 6.3 84 Cloud Peak Reservoir 9860 9.3 10.6 88 7.7 9.8 79 Grave Springs 8550 5.8 7.1 82 6.6 8.0 82 Hansen Sawmill 8360 4.1 4.7 87 5.6 6.2 90 Middle Powder 7760 7.0 8.3 84 3.5 8.9 39 Powder River Pass 9480 8.4 8.1 104 7.6 9.8 78 Soldier Park 8720 2.2 -M * 5.2 -M * ----- ----- Basin Index (%) 95 74 TONGUE RIVER Big Goose 7990 5.7 6.3 90 7.5 8.0 94 Bone Springs Div 9350 11.1 12.5 89 9.1 12.0 76 Burgess Junction 7880 6.5 8.6 76 6.6 9.2 72 Dome Lake 8880 6.4 8.8 73 6.0 10.1 59 Little Goose 8870 7.0 -M * 6.1 -M * Sucker Creek 8880 8.3 9.2 90 7.2 10.8 67 Tie Creek 6870 3.3 4.4 75 7.5 8.6 87 ----- ----- Basin Index (%) 83 75 BELLE FOURCHE Blind Park 6890 7.0 6.4 109 5.8 9.6 60 Cole Canyon 5910 5.3 4.9 108 9.1 7.2 126 ----- ----- Basin Index (%) 109 89 CHEYENNE RIVER BASIN Blind Park 6890 7.0 6.4 109 5.8 9.6 60 North Rapid Creek 6130 5.5 6.0 92 5.5 7.7 71 ----- ----- Basin Index (%) 101 65 UPPER N. PLATTE Arapaho Ridge 10960 19.9 17.0 117 20.3 18.0 113 Blackhall Mtn 9820 25.5 -M * 27.0 -M * Columbine 9160 23.3 20.2 115 23.3 20.6 113 Divide Peak 8880 16.0 16.3 98 18.9 17.0 111 Joe Wright 10120 16.9 17.1 99 24.5 20.2 121 Laprele Creek 8375 9.1 7.8 117 9.8 9.5 103 Med Bow 10500 29.4 -M * 27.5 -M * Never Summer 10280 17.2 16.3 106 15.0 -M * North French Creek 10130 23.4 21.3 110 24.1 21.3 113 Old Battle 10000 29.0 24.3 119 29.4 28.3 104 Rawah 9020 11.0 8.9 124 13.6 11.1 123 Sage Creek Basin 7850 14.4 10.7 135 14.2 11.9 119 Sand Lake 10050 22.3 21.4 104 18.6 19.1 97 South Brush Creek 8440 8.9 10.6 84 9.5 11.9 80 Tower 10500 42.6 36.9 115 35.2 32.4 109 Webber Springs 9250 20.7 19.0 109 24.6 21.4 115 Whiskey Park 8950 24.3 22.0 110 26.9 22.7 119 Willow Creek Pass 9540 12.1 9.7 125 13.7 10.5 130 Zirkel 9340 26.9 23.6 114 30.6 23.6 130 ----- ----- Basin Index (%) 112 113 SWEETWATER Deer Park 9700 14.0 10.9 128 14.9 15.5 96 Larsen Creek 9000 9.5 9.8 97 12.5 -M * South Pass 9040 11.6 11.8 98 10.0 13.7 73 ----- ----- Basin Index (%) 108 85 LOWER N. PLATTE Casper Mtn. 7900 10.9 10.6 103 8.8 11.3 78 Laprele Creek 8375 9.1 7.8 117 9.8 9.5 103 Reno Hill 8400 10.9 10.5 104 11.5 11.3 102 Windy Peak 7900 6.6 5.9 112 7.3 7.9 92 ----- ----- Basin Index (%) 108 94 LARAMIE RIVER Brooklyn Lake 10240 18.4 15.5 119 19.8 16.3 121 Cinnabar Park 9574 16.7 17.4 96 19.2 19.8 97 Crow Creek 8330 3.8 6.8 56 7.6 7.9 96 Deadman Hill 10220 15.7 12.6 125 14.7 13.0 113 Rawah 9020 11.0 8.9 124 13.6 11.1 123 Roach 9700 13.2 12.6 105 16.2 14.9 109 Windy Peak 7900 6.6 5.9 112 7.3 7.9 92 ----- ----- Basin Index (%) 107 108 S. PLATTE Black Mountain 8920 8.4 -M * 9.3 -M * Crow Creek 8330 3.8 6.8 56 7.6 7.9 96 Deadman Hill 10220 15.7 12.6 125 14.7 13.0 113 ----- ----- Basin Index (%) 101 107 LITTLE SNAKE RIVER Battle Mountain 7440 11.2 10.0 112 13.3 12.3 108 Divide Peak 8880 16.0 16.3 98 18.9 17.0 111 Elk River 8700 16.4 16.0 102 15.6 16.2 96 Little Snake River 8915 23.0 19.9 116 31.1 25.2 123 Old Battle 10000 29.0 24.3 119 29.4 28.3 104 Sage Creek Basin 7850 14.4 10.7 135 14.2 11.9 119 Sandstone RS 8150 14.1 10.9 129 15.1 15.3 99 Whiskey Park 8950 24.3 22.0 110 26.9 22.7 119 ----- ----- Basin Index (%) 114 110 UPPER GREEN RIVER Big Sandy Opening 9080 11.6 10.3 113 12.3 10.7 115 Blind Bull Sum 8650 19.3 18.3 105 15.7 16.3 96 East Rim Divide 7930 9.3 8.5 109 9.5 9.7 98 Elkhart Park G.S. 9400 10.6 9.6 110 11.4 10.7 107 Gros Ventre Summit 8750 8.3 10.1 82 9.9 10.3 96 Gunsight Pass 9820 11.3 10.8 105 13.2 11.0 120 Indian Creek 9425 17.7 19.2 92 14.2 18.2 78 Kendall R.S. 7740 9.8 9.9 99 10.2 11.9 86 Loomis Park 8240 13.9 12.0 116 14.7 14.3 103 New Fork Lake 8340 8.4 8.4 100 7.7 8.9 87 Pocket Creek 9360 12.0 -M * 12.9 -M * Snyder Basin 8060 9.8 10.0 98 11.4 11.7 97 Spring Creek Divide 9000 19.2 19.0 101 19.8 19.6 101 Triple Peak 8500 19.7 17.4 113 21.7 20.6 105 ----- ----- Basin Index (%) 103 99 LOWER GREEN RIVER Blacks Fork Jct 8869 7.2 -M * 10.2 -M * Buck Pasture 9632 12.3 -M * 15.1 -M * EF Blacks Fork GS 9360 9.7 -M * 8.3 -M * Hams Fork 7840 8.4 9.5 88 8.9 9.3 96 Hewinta 9500 8.7 8.1 107 11.4 11.0 104 Hickerson Park 9122 6.5 6.1 107 8.8 7.7 114 Hole-in-Rock 9168 5.3 5.7 93 8.2 7.2 114 Indian Creek 9425 17.7 19.2 92 14.2 18.2 78 Kelley R.S. 8180 11.2 12.2 92 11.8 14.8 80 Spirit Lk 10235 12.3 -M * 12.7 -M * Steel Creek Park 10158 12.3 11.8 104 14.3 12.6 113 ----- ----- Basin Index (%) 97 96 UPPER BEAR RIVER Bear River RS 8777 9.0 -M * 11.9 -M * Bug Lake 7987 18.4 15.2 121 18.7 15.8 118 Burts Miller Ranch 8000 6.1 -M * 7.0 -M * Chalk Creek #1 9171 19.7 18.7 105 24.0 19.9 121 Hayden Fork 9130 14.5 12.4 117 19.3 16.7 116 Kelley R.S. 8180 11.2 12.2 92 11.8 14.8 80 Lily Lake 9133 10.1 10.6 95 13.3 13.5 99 Monte Cristo 8932 25.2 21.7 116 24.4 20.9 117 Salt River Summit 7640 11.1 10.7 104 12.9 13.7 94 Spring Creek Divide 9000 19.2 19.0 101 19.8 19.6 101 ----- ----- Basin Index (%) 107 107 ----------------------------------------------------------------------------- -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.