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 8 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 18.2 13.8 132 19.9 18.0 111 Black Bear 8170 39.6 30.9 128 38.9 32.6 119 Blind Bull Sum 8650 20.7 19.0 109 16.8 16.6 101 Cottonwood Creek 7670 18.8 18.2 103 22.0 20.5 107 East Rim Divide 7930 10.2 9.2 111 10.4 10.0 104 Grand Targhee 9260 37.7 31.3 120 28.4 25.4 112 Granite Creek 6770 18.5 14.4 128 19.2 17.3 111 Grassy Lake 7265 30.7 27.2 113 33.9 30.8 110 Gros Ventre Summit 8750 8.6 10.7 80 10.5 10.7 98 Gunsight Pass 9820 12.0 11.3 106 13.8 11.4 121 Lewis Lake Divide 7850 32.2 25.9 124 30.7 30.3 101 Phillips Bench 8200 27.1 20.8 130 -M 23.8 * Salt River Summit 7640 12.1 11.0 110 13.8 14.1 98 Snake River Station 6920 19.6 14.9 132 23.9 19.5 123 Spring Creek Divide 9000 20.7 19.5 106 21.2 20.1 105 Thumb Divide 7980 17.2 12.8 134 16.3 15.5 105 Togwotee Pass 9580 21.7 19.2 113 22.3 20.4 109 Two Ocean Plateau 9240 27.5 22.5 122 21.8 22.9 95 Willow Creek 8080 26.8 23.8 113 30.1 28.0 108 Younts Peak 8350 -M 12.1 * -M 13.2 * ----- ----- Basin Index (%) 118 108 MADISON-GALLATIN Black Bear 8170 39.6 30.9 128 38.9 32.6 119 Canyon 7870 12.4 11.3 110 14.2 13.7 104 Madison Plateau 7750 25.7 18.8 137 25.0 22.4 112 West Yellowstone 6700 13.8 9.4 147 15.7 12.2 129 Whiskey Creek 6800 18.0 12.8 141 18.2 17.1 106 ----- ----- Basin Index (%) 132 114 YELLOWSTONE Beartooth Lake 9360 18.2 18.0 101 16.8 16.6 101 Burnt Mtn 5880 7.6 4.4 173 12.0 9.8 122 Canyon 7870 12.4 11.3 110 14.2 13.7 104 Cole Creek 7850 13.8 10.9 127 -M 9.6 * Evening Star 9200 23.4 20.5 114 25.4 23.1 110 Fisher Creek 9100 27.9 26.6 105 30.7 26.7 115 Northeast Entrance 7350 10.0 8.6 116 12.1 10.3 117 Parker Peak 9400 -M 16.5 * -M 14.7 * Sylvan Lake 8420 18.8 16.7 113 24.2 18.8 129 Thumb Divide 7980 17.2 12.8 134 16.3 15.5 105 Two Ocean Plateau 9240 27.5 22.5 122 21.8 22.9 95 White Mill 8700 19.7 18.9 104 17.3 19.9 87 Wolverine 7650 11.6 9.0 129 11.6 10.4 112 Younts Peak 8350 -M 12.1 * -M 13.2 * ----- ----- Basin Index (%) 115 108 WIND RIVER Burroughs Creek 8750 9.9 -M * 11.6 -M * Castle Creek 8400 3.8 -M * 5.1 -M * Cold Springs 9630 5.9 5.8 102 6.3 7.9 80 Deer Park 9700 14.6 11.6 126 15.7 16.1 98 Hobbs Park 10100 12.1 10.7 113 9.2 10.1 91 Kirwin 9550 9.0 7.6 118 9.4 9.2 102 Little Warm 9370 7.7 8.5 91 7.6 10.4 73 Owl Creek 8975 4.4 4.2 105 5.0 4.5 111 South Pass 9040 12.2 12.3 99 10.4 14.3 73 St. Lawrence Alt 8620 3.9 5.7 68 7.1 6.9 103 Togwotee Pass 9580 21.7 19.2 113 22.3 20.4 109 Townsend Creek 8700 7.6 7.2 106 8.4 9.1 92 ----- ----- Basin Index (%) 107 93 BIGHORN BASIN Bald Mtn. 9380 14.7 15.8 93 10.7 13.8 78 Bear Trap Meadow 8200 7.0 4.6 152 6.2 6.4 97 Bone Springs Div 9350 11.2 13.1 85 9.8 12.3 80 Grave Springs 8550 6.4 7.3 88 7.2 8.2 88 Kirwin 9550 9.0 7.6 118 9.4 9.2 102 Marquette 8760 6.1 -M * 7.6 -M * Middle Powder 7760 7.5 8.6 87 4.3 9.1 47 Owl Creek 8975 4.4 4.2 105 5.0 4.5 111 Powder River Pass 9480 8.7 8.3 105 8.1 10.0 81 Shell Creek 9580 11.7 12.2 96 10.0 11.0 91 Timber Creek 7950 3.2 4.0 80 5.0 5.5 91 ----- ----- Basin Index (%) 98 84 SHOSHONE RIVER Blackwater 9780 21.1 18.6 113 21.4 16.9 127 Evening Star 9200 23.4 20.5 114 25.4 23.1 110 Marquette 8760 6.1 -M * 7.6 -M * Sylvan Lake 8420 18.8 16.7 113 24.2 18.8 129 Sylvan Road 7120 11.7 9.9 118 14.7 14.5 101 Younts Peak 8350 -M 12.1 * -M 13.2 * ----- ----- Basin Index (%) 114 117 POWDER RIVER Bear Trap Meadow 8200 7.0 4.6 152 6.2 6.4 97 Cloud Peak Reservoir 9860 9.6 11.3 85 8.7 10.1 86 Grave Springs 8550 6.4 7.3 88 7.2 8.2 88 Hansen Sawmill 8360 4.5 5.0 90 6.0 6.4 94 Middle Powder 7760 7.5 8.6 87 4.3 9.1 47 Powder River Pass 9480 8.7 8.3 105 8.1 10.0 81 Soldier Park 8720 3.2 -M * 5.7 -M * ----- ----- Basin Index (%) 97 81 TONGUE RIVER Big Goose 7990 6.2 6.6 94 7.9 8.3 95 Bone Springs Div 9350 11.2 13.1 85 9.8 12.3 80 Burgess Junction 7880 6.6 9.0 73 7.5 9.5 79 Dome Lake 8880 7.0 9.2 76 6.8 10.4 65 Little Goose 8870 7.5 -M * 6.2 -M * Sucker Creek 8880 8.6 9.8 88 8.4 11.1 76 Tie Creek 6870 3.8 4.7 81 8.1 8.8 92 ----- ----- Basin Index (%) 83 80 BELLE FOURCHE Blind Park 6890 7.3 6.6 111 6.4 9.8 65 Cole Canyon 5910 5.5 4.9 112 9.6 7.3 132 ----- ----- Basin Index (%) 111 94 CHEYENNE RIVER BASIN Blind Park 6890 7.3 6.6 111 6.4 9.8 65 North Rapid Creek 6130 5.9 6.2 95 5.8 7.9 73 ----- ----- Basin Index (%) 103 69 UPPER N. PLATTE Arapaho Ridge 10960 21.3 17.4 122 21.6 18.4 117 Blackhall Mtn 9820 27.4 -M * 28.7 -M * Columbine 9160 25.3 20.8 122 25.0 21.3 117 Divide Peak 8880 17.0 16.8 101 19.6 17.6 111 Joe Wright 10120 18.0 18.0 100 25.6 21.0 122 Laprele Creek 8375 9.9 8.2 121 10.5 9.8 107 Med Bow 10500 31.7 -M * 29.3 -M * Never Summer 10280 18.6 16.7 111 15.8 -M * North French Creek 10130 25.0 22.1 113 25.3 22.1 114 Old Battle 10000 31.0 25.1 124 30.7 29.3 105 Rawah 9020 12.1 9.1 133 14.7 11.4 129 Sage Creek Basin 7850 15.6 11.2 139 15.1 12.2 124 Sand Lake 10050 23.7 22.0 108 20.1 20.0 100 South Brush Creek 8440 9.6 11.0 87 10.3 12.3 84 Tower 10500 45.5 37.8 120 35.7 33.4 107 Webber Springs 9250 22.4 19.8 113 26.5 22.2 119 Whiskey Park 8950 -M 22.8 * -M 23.4 * Willow Creek Pass 9540 12.9 10.1 128 14.5 10.9 133 Zirkel 9340 29.7 24.7 120 31.3 24.1 130 ----- ----- Basin Index (%) 116 114 SWEETWATER Deer Park 9700 14.6 11.6 126 15.7 16.1 98 Larsen Creek 9000 10.7 10.1 106 13.5 -M * South Pass 9040 12.2 12.3 99 10.4 14.3 73 ----- ----- Basin Index (%) 110 86 LOWER N. PLATTE Casper Mtn. 7900 11.1 11.2 99 9.3 11.6 80 Laprele Creek 8375 9.9 8.2 121 10.5 9.8 107 Reno Hill 8400 11.9 11.0 108 12.7 11.8 108 Windy Peak 7900 7.7 6.4 120 8.2 8.3 99 ----- ----- Basin Index (%) 110 98 LARAMIE RIVER Brooklyn Lake 10240 20.1 16.3 123 21.2 17.0 125 Cinnabar Park 9574 17.9 17.7 101 20.3 20.3 100 Crow Creek 8330 4.3 7.0 61 8.1 8.3 98 Deadman Hill 10220 17.1 12.8 134 16.0 13.7 117 Rawah 9020 12.1 9.1 133 14.7 11.4 129 Roach 9700 14.7 13.1 112 18.0 15.6 115 Windy Peak 7900 7.7 6.4 120 8.2 8.3 99 ----- ----- Basin Index (%) 114 113 S. PLATTE Black Mountain 8920 9.0 -M * 9.8 -M * Crow Creek 8330 4.3 7.0 61 8.1 8.3 98 Deadman Hill 10220 17.1 12.8 134 16.0 13.7 117 ----- ----- Basin Index (%) 108 110 LITTLE SNAKE RIVER Battle Mountain 7440 12.0 10.3 117 14.4 12.7 113 Divide Peak 8880 17.0 16.8 101 19.6 17.6 111 Elk River 8700 17.8 16.6 107 16.5 16.8 98 Little Snake River 8915 25.7 20.2 127 33.4 25.6 130 Old Battle 10000 31.0 25.1 124 30.7 29.3 105 Sage Creek Basin 7850 15.6 11.2 139 15.1 12.2 124 Sandstone RS 8150 15.6 11.7 133 16.4 15.7 104 Whiskey Park 8950 -M 22.8 * -M 23.4 * ----- ----- Basin Index (%) 120 112 UPPER GREEN RIVER Big Sandy Opening 9080 12.7 10.6 120 13.5 11.0 123 Blind Bull Sum 8650 20.7 19.0 109 16.8 16.6 101 East Rim Divide 7930 10.2 9.2 111 10.4 10.0 104 Elkhart Park G.S. 9400 11.6 9.9 117 12.2 11.0 111 Gros Ventre Summit 8750 8.6 10.7 80 10.5 10.7 98 Gunsight Pass 9820 12.0 11.3 106 13.8 11.4 121 Indian Creek 9425 19.3 19.9 97 15.4 18.7 82 Kendall R.S. 7740 10.7 10.3 104 11.1 12.3 90 Loomis Park 8240 14.9 12.5 119 15.7 14.7 107 New Fork Lake 8340 9.2 8.8 105 8.5 9.2 92 Pocket Creek 9360 13.2 -M * 14.0 -M * Snyder Basin 8060 10.7 10.5 102 12.3 12.0 102 Spring Creek Divide 9000 20.7 19.5 106 21.2 20.1 105 Triple Peak 8500 20.9 18.2 115 22.9 21.2 108 ----- ----- Basin Index (%) 107 103 LOWER GREEN RIVER Blacks Fork Jct 8869 7.7 -M * 10.5 -M * Buck Pasture 9632 13.1 -M * 15.6 -M * EF Blacks Fork GS 9360 10.4 -M * 8.6 -M * Hams Fork 7840 9.7 9.8 99 10.0 9.5 105 Hewinta 9500 9.2 8.5 108 11.9 11.3 105 Hickerson Park 9122 6.7 6.2 108 9.0 8.0 112 Hole-in-Rock 9168 5.6 5.9 95 8.5 7.4 115 Indian Creek 9425 19.3 19.9 97 15.4 18.7 82 Kelley R.S. 8180 12.7 12.5 102 13.2 15.2 87 Spirit Lk 10235 12.9 -M * 13.3 -M * Steel Creek Park 10158 12.2 12.3 99 14.8 13.0 114 ----- ----- Basin Index (%) 100 100 UPPER BEAR RIVER Bear River RS 8777 9.6 -M * 12.4 -M * Bug Lake 7987 20.4 15.8 129 20.3 16.1 126 Burts Miller Ranch 8000 6.5 -M * 7.3 -M * Chalk Creek #1 9171 21.2 19.4 109 24.3 20.5 119 Hayden Fork 9130 15.3 12.8 120 19.9 17.1 116 Kelley R.S. 8180 12.7 12.5 102 13.2 15.2 87 Lily Lake 9133 10.5 10.8 97 13.7 13.9 99 Monte Cristo 8932 27.4 22.5 122 25.6 21.4 120 Salt River Summit 7640 12.1 11.0 110 13.8 14.1 98 Spring Creek Divide 9000 20.7 19.5 106 21.2 20.1 105 ----- ----- Basin Index (%) 113 110 ----------------------------------------------------------------------------- -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.