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 9 , 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 20.2 18.1 112 Black Bear 8170 40.0 31.2 128 39.3 32.8 120 Blind Bull Sum 8650 20.9 19.1 109 16.9 16.8 101 Cottonwood Creek 7670 19.1 18.3 104 22.3 20.6 108 East Rim Divide 7930 10.2 9.3 110 10.3 10.1 102 Grand Targhee 9260 38.7 31.5 123 29.0 25.4 114 Granite Creek 6770 18.7 14.5 129 19.2 17.4 110 Grassy Lake 7265 31.2 27.3 114 34.0 31.0 110 Gros Ventre Summit 8750 8.8 10.7 82 10.7 10.8 99 Gunsight Pass 9820 12.1 11.5 105 14.0 11.5 122 Lewis Lake Divide 7850 32.5 26.1 125 30.8 30.5 101 Phillips Bench 8200 27.3 20.9 131 -M 24.0 * Salt River Summit 7640 12.2 11.0 111 13.8 14.1 98 Snake River Station 6920 19.8 15.0 132 24.0 19.5 123 Spring Creek Divide 9000 20.7 19.5 106 21.3 20.3 105 Thumb Divide 7980 17.5 13.0 135 16.4 15.6 105 Togwotee Pass 9580 22.1 19.3 115 22.5 20.5 110 Two Ocean Plateau 9240 27.8 22.7 122 21.9 23.1 95 Willow Creek 8080 27.2 24.0 113 30.5 28.1 109 Younts Peak 8350 -M 12.2 * -M 13.3 * ----- ----- Basin Index (%) 118 108 MADISON-GALLATIN Black Bear 8170 40.0 31.2 128 39.3 32.8 120 Canyon 7870 12.6 11.4 111 14.4 13.9 104 Madison Plateau 7750 26.0 19.0 137 25.2 22.6 112 West Yellowstone 6700 13.8 9.5 145 15.9 12.3 129 Whiskey Creek 6800 18.2 13.0 140 18.4 17.2 107 ----- ----- Basin Index (%) 132 115 YELLOWSTONE Beartooth Lake 9360 18.3 18.1 101 17.0 16.7 102 Burnt Mtn 5880 7.8 4.4 177 12.0 10.0 120 Canyon 7870 12.6 11.4 111 14.4 13.9 104 Cole Creek 7850 13.6 11.0 124 -M 9.8 * Evening Star 9200 23.6 20.6 115 25.6 23.2 110 Fisher Creek 9100 28.0 26.7 105 30.8 26.9 114 Northeast Entrance 7350 10.0 8.6 116 12.2 10.4 117 Parker Peak 9400 -M 16.5 * -M 14.8 * Sylvan Lake 8420 19.1 16.8 114 24.5 18.9 130 Thumb Divide 7980 17.5 13.0 135 16.4 15.6 105 Two Ocean Plateau 9240 27.8 22.7 122 21.9 23.1 95 White Mill 8700 19.8 19.0 104 17.4 20.1 87 Wolverine 7650 11.7 9.0 130 11.6 10.4 112 Younts Peak 8350 -M 12.2 * -M 13.3 * ----- ----- Basin Index (%) 116 108 WIND RIVER Burroughs Creek 8750 9.9 -M * 11.7 -M * Castle Creek 8400 3.9 -M * 5.2 -M * Cold Springs 9630 6.0 5.8 103 6.3 7.9 80 Deer Park 9700 14.6 11.8 124 15.7 16.1 98 Hobbs Park 10100 12.2 10.8 113 9.2 10.2 90 Kirwin 9550 9.2 7.6 121 9.4 9.3 101 Little Warm 9370 7.9 8.6 92 7.7 10.4 74 Owl Creek 8975 4.4 4.3 102 5.0 4.5 111 South Pass 9040 12.3 12.4 99 10.4 14.4 72 St. Lawrence Alt 8620 3.8 5.8 66 7.2 6.9 104 Togwotee Pass 9580 22.1 19.3 115 22.5 20.5 110 Townsend Creek 8700 7.7 7.3 105 8.4 9.2 91 ----- ----- Basin Index (%) 107 93 BIGHORN BASIN Bald Mtn. 9380 14.9 15.9 94 10.7 13.8 78 Bear Trap Meadow 8200 7.1 4.6 154 6.2 6.5 95 Bone Springs Div 9350 11.5 13.2 87 9.8 12.4 79 Grave Springs 8550 6.8 7.3 93 7.5 8.2 91 Kirwin 9550 9.2 7.6 121 9.4 9.3 101 Marquette 8760 6.2 -M * 7.7 -M * Middle Powder 7760 7.9 8.7 91 4.3 9.2 47 Owl Creek 8975 4.4 4.3 102 5.0 4.5 111 Powder River Pass 9480 8.9 8.3 107 8.2 10.1 81 Shell Creek 9580 12.0 12.2 98 10.1 11.1 91 Timber Creek 7950 3.2 4.0 80 5.1 5.5 93 ----- ----- Basin Index (%) 100 84 SHOSHONE RIVER Blackwater 9780 21.3 18.8 113 21.6 17.0 127 Evening Star 9200 23.6 20.6 115 25.6 23.2 110 Marquette 8760 6.2 -M * 7.7 -M * Sylvan Lake 8420 19.1 16.8 114 24.5 18.9 130 Sylvan Road 7120 11.8 10.0 118 14.8 14.6 101 Younts Peak 8350 -M 12.2 * -M 13.3 * ----- ----- Basin Index (%) 115 117 POWDER RIVER Bear Trap Meadow 8200 7.1 4.6 154 6.2 6.5 95 Cloud Peak Reservoir 9860 10.0 11.5 87 8.8 10.2 86 Grave Springs 8550 6.8 7.3 93 7.5 8.2 91 Hansen Sawmill 8360 4.6 5.1 90 6.2 6.5 95 Middle Powder 7760 7.9 8.7 91 4.3 9.2 47 Powder River Pass 9480 8.9 8.3 107 8.2 10.1 81 Soldier Park 8720 3.3 -M * 5.8 -M * ----- ----- Basin Index (%) 100 81 TONGUE RIVER Big Goose 7990 6.5 6.7 97 8.2 8.3 99 Bone Springs Div 9350 11.5 13.2 87 9.8 12.4 79 Burgess Junction 7880 6.8 9.1 75 7.5 9.6 78 Dome Lake 8880 7.2 9.3 77 6.8 10.5 65 Little Goose 8870 7.7 -M * 6.5 -M * Sucker Creek 8880 8.9 9.9 90 8.3 11.2 74 Tie Creek 6870 3.9 4.7 83 8.3 8.9 93 ----- ----- Basin Index (%) 85 80 BELLE FOURCHE Blind Park 6890 7.4 6.7 110 6.4 9.9 65 Cole Canyon 5910 5.7 5.0 114 9.8 7.3 134 ----- ----- Basin Index (%) 112 94 CHEYENNE RIVER BASIN Blind Park 6890 7.4 6.7 110 6.4 9.9 65 North Rapid Creek 6130 6.0 6.2 97 5.9 8.0 74 ----- ----- Basin Index (%) 104 69 UPPER N. PLATTE Arapaho Ridge 10960 22.2 17.5 127 22.3 18.5 121 Blackhall Mtn 9820 28.3 -M * 29.3 -M * Columbine 9160 26.2 20.9 125 25.5 21.4 119 Divide Peak 8880 17.9 16.8 107 19.9 17.8 112 Joe Wright 10120 18.8 18.2 103 26.4 21.2 125 Laprele Creek 8375 10.3 8.3 124 10.8 9.9 109 Med Bow 10500 32.5 -M * 29.7 -M * Never Summer 10280 19.4 16.8 115 16.4 -M * North French Creek 10130 25.7 22.5 114 25.9 22.2 117 Old Battle 10000 32.1 25.3 127 30.8 29.4 105 Rawah 9020 12.6 9.2 137 15.1 11.4 132 Sage Creek Basin 7850 16.0 11.3 142 15.6 12.3 127 Sand Lake 10050 24.3 22.3 109 20.2 20.1 100 South Brush Creek 8440 9.9 11.1 89 10.4 12.4 84 Tower 10500 47.2 37.9 125 -M 33.6 * Webber Springs 9250 23.2 20.0 116 27.3 22.3 122 Whiskey Park 8950 27.5 23.0 120 29.6 23.6 125 Willow Creek Pass 9540 13.4 10.2 131 14.9 10.9 137 Zirkel 9340 30.8 25.0 123 31.3 24.1 130 ----- ----- Basin Index (%) 119 117 SWEETWATER Deer Park 9700 14.6 11.8 124 15.7 16.1 98 Larsen Creek 9000 10.7 10.2 105 13.5 -M * South Pass 9040 12.3 12.4 99 10.4 14.4 72 ----- ----- Basin Index (%) 109 86 LOWER N. PLATTE Casper Mtn. 7900 11.2 11.3 99 9.4 11.8 80 Laprele Creek 8375 10.3 8.3 124 10.8 9.9 109 Reno Hill 8400 12.1 11.1 109 12.7 11.9 107 Windy Peak 7900 8.1 6.4 127 8.4 8.4 100 ----- ----- Basin Index (%) 112 98 LARAMIE RIVER Brooklyn Lake 10240 20.9 16.5 127 21.7 17.2 126 Cinnabar Park 9574 18.5 17.7 105 20.7 20.6 100 Crow Creek 8330 4.4 7.0 63 8.3 8.4 99 Deadman Hill 10220 17.6 12.8 138 16.3 13.7 119 Rawah 9020 12.6 9.2 137 15.1 11.4 132 Roach 9700 15.3 13.2 116 18.7 15.7 119 Windy Peak 7900 8.1 6.4 127 8.4 8.4 100 ----- ----- Basin Index (%) 118 114 S. PLATTE Black Mountain 8920 9.2 -M * 10.0 -M * Crow Creek 8330 4.4 7.0 63 8.3 8.4 99 Deadman Hill 10220 17.6 12.8 138 16.3 13.7 119 ----- ----- Basin Index (%) 111 111 LITTLE SNAKE RIVER Battle Mountain 7440 12.5 10.4 120 14.9 12.8 116 Divide Peak 8880 17.9 16.8 107 19.9 17.8 112 Elk River 8700 18.8 16.7 113 17.1 16.9 101 Little Snake River 8915 26.8 20.2 133 33.5 25.7 130 Old Battle 10000 32.1 25.3 127 30.8 29.4 105 Sage Creek Basin 7850 16.0 11.3 142 15.6 12.3 127 Sandstone RS 8150 16.2 11.8 137 16.8 15.8 106 Whiskey Park 8950 27.5 23.0 120 29.6 23.6 125 ----- ----- Basin Index (%) 124 115 UPPER GREEN RIVER Big Sandy Opening 9080 12.7 10.6 120 13.5 11.1 122 Blind Bull Sum 8650 20.9 19.1 109 16.9 16.8 101 East Rim Divide 7930 10.2 9.3 110 10.3 10.1 102 Elkhart Park G.S. 9400 11.6 10.0 116 12.3 11.1 111 Gros Ventre Summit 8750 8.8 10.7 82 10.7 10.8 99 Gunsight Pass 9820 12.1 11.5 105 14.0 11.5 122 Indian Creek 9425 19.5 20.0 98 15.6 18.8 83 Kendall R.S. 7740 10.8 10.4 104 11.2 12.4 90 Loomis Park 8240 15.0 12.5 120 15.8 14.8 107 New Fork Lake 8340 9.2 8.9 103 8.5 9.2 92 Pocket Creek 9360 13.2 -M * 14.0 -M * Snyder Basin 8060 10.9 10.5 104 12.4 12.1 102 Spring Creek Divide 9000 20.7 19.5 106 21.3 20.3 105 Triple Peak 8500 21.0 18.3 115 23.0 21.4 107 ----- ----- Basin Index (%) 107 103 LOWER GREEN RIVER Blacks Fork Jct 8869 8.0 -M * 10.8 -M * Buck Pasture 9632 13.4 -M * 15.7 -M * EF Blacks Fork GS 9360 10.6 -M * 8.9 -M * Hams Fork 7840 9.8 9.9 99 10.1 9.6 105 Hewinta 9500 9.6 8.6 112 12.1 11.4 106 Hickerson Park 9122 6.8 6.3 108 9.1 8.0 114 Hole-in-Rock 9168 5.7 6.0 95 8.7 7.5 116 Indian Creek 9425 19.5 20.0 98 15.6 18.8 83 Kelley R.S. 8180 12.9 12.6 102 13.4 15.3 88 Spirit Lk 10235 13.2 -M * 13.6 -M * Steel Creek Park 10158 12.7 12.4 102 15.0 13.1 115 ----- ----- Basin Index (%) 102 100 UPPER BEAR RIVER Bear River RS 8777 9.9 -M * 12.8 -M * Bug Lake 7987 20.7 15.9 130 20.5 16.2 127 Burts Miller Ranch 8000 6.9 -M * 7.4 -M * Chalk Creek #1 9171 21.8 19.6 111 24.4 20.6 118 Hayden Fork 9130 16.0 13.0 123 20.6 17.2 120 Kelley R.S. 8180 12.9 12.6 102 13.4 15.3 88 Lily Lake 9133 10.8 10.9 99 14.0 14.0 100 Monte Cristo 8932 28.3 22.7 125 25.7 21.5 120 Salt River Summit 7640 12.2 11.0 111 13.8 14.1 98 Spring Creek Divide 9000 20.7 19.5 106 21.3 20.3 105 ----- ----- Basin Index (%) 115 110 ----------------------------------------------------------------------------- -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.