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: APRIL 6 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 16.9 15.2 111 20.8 20.5 101 Black Bear 8170 43.2 37.2 116 42.2 37.6 112 Blind Bull Sum 8650 23.4 23.1 101 18.5 19.2 96 Cottonwood Creek 7670 20.2 21.0 96 25.1 24.3 103 East Rim Divide 7930 11.0 10.2 108 11.6 11.6 100 Grand Targhee 9260 42.6 38.2 112 31.2 30.4 103 Granite Creek 6770 18.5 14.6 127 20.1 19.4 104 Grassy Lake 7265 33.4 31.5 106 36.3 35.3 103 Gros Ventre Summit 8750 8.7 12.9 67 11.6 12.7 91 Gunsight Pass 9820 12.6 13.7 92 15.1 13.6 111 Lewis Lake Divide 7850 35.3 29.8 118 37.1 34.8 107 Phillips Bench 8200 29.2 25.2 116 31.2 27.7 113 Salt River Summit 7640 13.3 12.9 103 15.9 16.4 97 Snake River Station 6920 19.4 14.9 130 24.9 22.1 113 Spring Creek Divide 9000 22.9 22.5 102 23.3 23.5 99 Thumb Divide 7980 18.8 14.7 128 18.5 18.3 101 Togwotee Pass 9580 23.3 22.0 106 24.1 23.9 101 Two Ocean Plateau 9240 29.3 25.9 113 24.7 26.6 93 Willow Creek 8080 31.2 28.4 110 33.8 33.0 102 Younts Peak 8350 -M 14.3 * -M 15.5 * ----- ----- Basin Index (%) 109 103 MADISON-GALLATIN Black Bear 8170 43.2 37.2 116 42.2 37.6 112 Canyon 7870 13.8 12.5 110 15.7 16.0 98 Madison Plateau 7750 27.5 21.4 129 27.0 25.9 104 West Yellowstone 6700 12.8 9.7 132 16.7 14.0 119 Whiskey Creek 6800 19.5 14.9 131 19.8 19.8 100 ----- ----- Basin Index (%) 122 107 YELLOWSTONE Beartooth Lake 9360 19.5 21.2 92 17.9 19.4 92 Burnt Mtn 5880 7.5 4.6 163 12.7 12.8 99 Canyon 7870 13.8 12.5 110 15.7 16.0 98 Cole Creek 7850 15.2 14.4 106 -M 12.7 * Evening Star 9200 24.7 23.7 104 27.5 26.8 103 Fisher Creek 9100 30.2 31.1 97 33.0 31.1 106 Northeast Entrance 7350 9.6 9.1 105 13.1 12.0 109 Parker Peak 9400 22.9 19.3 119 23.3 17.3 135 Sylvan Lake 8420 20.8 19.3 108 26.5 21.8 122 Thumb Divide 7980 18.8 14.7 128 18.5 18.3 101 Two Ocean Plateau 9240 29.3 25.9 113 24.7 26.6 93 White Mill 8700 21.7 22.1 98 18.6 23.2 80 Wolverine 7650 11.1 9.5 117 12.4 12.0 103 Younts Peak 8350 -M 14.3 * -M 15.5 * ----- ----- Basin Index (%) 108 103 WIND RIVER Burroughs Creek 8750 10.6 -M * 12.3 -M * Castle Creek 8400 4.2 -M * 5.6 -M * Cold Springs 9630 7.2 6.8 106 7.4 9.8 76 Deer Park 9700 15.5 15.4 101 17.3 19.6 88 Hobbs Park 10100 14.3 14.0 102 11.0 13.2 83 Kirwin 9550 10.4 9.6 108 10.8 11.4 95 Little Warm 9370 9.0 10.2 88 9.1 12.6 72 Owl Creek 8975 4.6 5.8 79 5.9 5.9 100 South Pass 9040 13.4 15.1 89 11.0 17.1 64 St. Lawrence Alt 8620 -M 6.8 * -M 8.9 * Togwotee Pass 9580 23.3 22.0 106 24.1 23.9 101 Townsend Creek 8700 9.6 9.5 101 10.6 11.9 89 ----- ----- Basin Index (%) 99 85 BIGHORN BASIN Bald Mtn. 9380 16.2 19.0 85 12.0 16.7 72 Bear Trap Meadow 8200 6.9 5.0 138 7.0 8.4 83 Bone Springs Div 9350 11.5 16.7 69 11.0 15.3 72 Grave Springs 8550 8.0 9.3 86 9.0 10.4 87 Kirwin 9550 10.4 9.6 108 10.8 11.4 95 Marquette 8760 7.3 -M * 8.7 -M * Middle Powder 7760 -M 11.9 * 7.1 11.5 62 Owl Creek 8975 4.6 5.8 79 5.9 5.9 100 Powder River Pass 9480 9.4 10.1 93 10.0 12.4 81 Shell Creek 9580 12.8 15.0 85 10.9 13.6 80 Timber Creek 7950 3.9 4.9 80 5.8 7.2 81 ----- ----- Basin Index (%) 88 79 SHOSHONE RIVER Blackwater 9780 23.2 22.4 104 23.4 20.2 116 Evening Star 9200 24.7 23.7 104 27.5 26.8 103 Marquette 8760 7.3 -M * 8.7 -M * Sylvan Lake 8420 20.8 19.3 108 26.5 21.8 122 Sylvan Road 7120 9.9 10.8 92 15.3 16.5 93 Younts Peak 8350 -M 14.3 * -M 15.5 * ----- ----- Basin Index (%) 103 109 POWDER RIVER Bear Trap Meadow 8200 6.9 5.0 138 7.0 8.4 83 Cloud Peak Reservoir 9860 11.6 14.7 79 10.3 13.1 79 Grave Springs 8550 8.0 9.3 86 9.0 10.4 87 Hansen Sawmill 8360 5.5 6.2 89 7.1 8.4 85 Middle Powder 7760 -M 11.9 * 7.1 11.5 62 Powder River Pass 9480 9.4 10.1 93 10.0 12.4 81 Soldier Park 8720 3.9 -M * 6.5 -M * ----- ----- Basin Index (%) 91 79 TONGUE RIVER Big Goose 7990 7.6 9.5 80 9.4 11.2 84 Bone Springs Div 9350 11.5 16.7 69 11.0 15.3 72 Burgess Junction 7880 8.1 11.8 69 8.4 12.2 69 Dome Lake 8880 -M 11.7 * 7.7 13.4 57 Little Goose 8870 8.9 -M * 7.5 -M * Sucker Creek 8880 10.2 12.0 85 9.6 14.2 68 Tie Creek 6870 4.1 5.5 75 9.6 11.5 83 ----- ----- Basin Index (%) 75 72 BELLE FOURCHE Blind Park 6890 5.8 7.1 82 7.4 11.8 63 Cole Canyon 5910 5.6 5.3 106 10.8 9.3 116 ----- ----- Basin Index (%) 92 86 CHEYENNE RIVER BASIN Blind Park 6890 5.8 7.1 82 7.4 11.8 63 North Rapid Creek 6130 5.9 6.6 89 6.9 9.8 70 ----- ----- Basin Index (%) 85 66 UPPER N. PLATTE Arapaho Ridge 10960 25.3 20.7 122 25.7 22.2 116 Blackhall Mtn 9820 32.7 -M * 33.3 -M * Columbine 9160 29.4 23.4 126 28.6 25.2 113 Divide Peak 8880 21.9 19.8 111 23.7 21.2 112 Joe Wright 10120 22.0 21.0 105 29.7 25.5 116 Laprele Creek 8375 13.5 9.4 144 14.7 12.3 120 Med Bow 10500 37.9 -M * 34.2 -M * Never Summer 10280 22.7 20.3 112 18.8 -M * North French Creek 10130 30.5 29.2 104 30.2 26.4 114 Old Battle 10000 36.6 31.1 118 36.9 34.6 107 Rawah 9020 13.5 10.6 127 17.4 14.0 124 Sage Creek Basin 7850 19.3 12.2 158 16.5 14.3 115 Sand Lake 10050 29.5 28.6 103 24.6 24.5 100 South Brush Creek 8440 11.1 12.0 92 12.3 15.0 82 Tower 10500 51.2 45.6 112 45.3 39.4 115 Webber Springs 9250 26.5 23.1 115 31.5 26.4 119 Whiskey Park 8950 31.6 27.2 116 32.7 27.6 118 Willow Creek Pass 9540 16.3 12.1 135 17.3 13.3 130 Zirkel 9340 34.7 26.3 132 37.2 28.1 132 ----- ----- Basin Index (%) 117 115 SWEETWATER Deer Park 9700 15.5 15.4 101 17.3 19.6 88 Larsen Creek 9000 10.6 11.7 91 14.2 -M * South Pass 9040 13.4 15.1 89 11.0 17.1 64 ----- ----- Basin Index (%) 94 77 LOWER N. PLATTE Casper Mtn. 7900 15.8 14.3 110 12.6 14.7 86 Laprele Creek 8375 13.5 9.4 144 14.7 12.3 120 Reno Hill 8400 17.0 14.0 121 17.5 15.2 115 Windy Peak 7900 10.9 7.8 140 11.8 10.4 113 ----- ----- Basin Index (%) 126 108 LARAMIE RIVER Brooklyn Lake 10240 24.3 21.5 113 25.3 20.9 121 Cinnabar Park 9574 20.6 21.0 98 23.5 24.0 98 Crow Creek 8330 6.0 7.0 86 10.6 10.7 99 Deadman Hill 10220 21.5 16.0 134 20.0 17.1 117 Rawah 9020 13.5 10.6 127 17.4 14.0 124 Roach 9700 17.8 16.4 109 21.8 19.0 115 Windy Peak 7900 10.9 7.8 140 11.8 10.4 113 ----- ----- Basin Index (%) 114 112 S. PLATTE Black Mountain 8920 12.1 -M * 12.9 -M * Crow Creek 8330 6.0 7.0 86 10.6 10.7 99 Deadman Hill 10220 21.5 16.0 134 20.0 17.1 117 ----- ----- Basin Index (%) 120 110 LITTLE SNAKE RIVER Battle Mountain 7440 11.8 9.8 120 16.7 14.8 113 Divide Peak 8880 21.9 19.8 111 23.7 21.2 112 Elk River 8700 19.7 19.2 103 19.5 19.8 98 Little Snake River 8915 29.4 24.9 118 37.7 29.2 129 Old Battle 10000 36.6 31.1 118 36.9 34.6 107 Sage Creek Basin 7850 19.3 12.2 158 16.5 14.3 115 Sandstone RS 8150 16.5 12.8 129 18.9 18.1 104 Whiskey Park 8950 31.6 27.2 116 32.7 27.6 118 ----- ----- Basin Index (%) 119 113 UPPER GREEN RIVER Big Sandy Opening 9080 13.8 12.5 110 14.4 13.0 111 Blind Bull Sum 8650 23.4 23.1 101 18.5 19.2 96 East Rim Divide 7930 11.0 10.2 108 11.6 11.6 100 Elkhart Park G.S. 9400 13.2 12.2 108 13.8 13.1 105 Gros Ventre Summit 8750 8.7 12.9 67 11.6 12.7 91 Gunsight Pass 9820 12.6 13.7 92 15.1 13.6 111 Indian Creek 9425 22.8 24.6 93 18.1 22.3 81 Kendall R.S. 7740 10.5 11.5 91 11.4 14.0 81 Loomis Park 8240 15.2 13.8 110 16.6 17.0 98 New Fork Lake 8340 10.1 10.3 98 9.5 10.6 90 Pocket Creek 9360 14.6 -M * 15.2 -M * Snider Basin 8060 11.2 12.3 91 13.4 14.0 96 Spring Creek Divide 9000 22.9 22.5 102 23.3 23.5 99 Triple Peak 8500 24.1 21.9 110 24.8 25.0 99 ----- ----- Basin Index (%) 99 96 LOWER GREEN RIVER Blacks Fork Jct 8869 8.6 -M * 12.4 -M * Buck Pasture 9632 14.7 -M * 18.1 -M * EF Blacks Fork GS 9360 11.3 -M * 10.3 -M * Hams Fork 7840 10.3 10.7 96 11.5 11.2 103 Hewinta 9500 11.9 10.9 109 14.2 13.9 102 Hickerson Park 9122 8.9 7.9 113 11.0 10.1 109 Hole-in-Rock 9168 6.5 7.0 93 10.1 9.7 104 Indian Creek 9425 22.8 24.6 93 18.1 22.3 81 Kelley R.S. 8180 15.2 14.8 103 15.6 17.8 88 Spirit Lk 10235 15.6 -M * 16.3 -M * Steel Creek Park 10158 14.4 15.7 92 17.4 16.3 107 ----- ----- Basin Index (%) 98 97 UPPER BEAR RIVER Bear River RS 8777 10.0 -M * 14.5 -M * Bug Lake 7987 23.7 18.3 130 23.3 19.2 121 Burts Miller Ranch 8000 5.7 -M * 8.3 -M * Chalk Creek #1 9171 25.2 24.3 104 29.1 24.9 117 Hayden Fork 9130 15.4 15.4 100 22.5 20.9 108 Kelley R.S. 8180 15.2 14.8 103 15.6 17.8 88 Lily Lake 9133 12.4 12.6 98 15.7 17.0 92 Monte Cristo 8932 33.6 27.6 122 31.2 25.6 122 Salt River Summit 7640 13.3 12.9 103 15.9 16.4 97 Spring Creek Divide 9000 22.9 22.5 102 23.3 23.5 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.