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: MAY 13 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 6.7 2.7 248 24.6 23.9 103 Black Bear 8170 42.4 36.5 116 49.8 43.6 114 Blind Bull Sum 8650 24.5 22.2 110 22.0 22.6 97 Cottonwood Creek 7670 13.4 11.6 116 30.4 29.3 104 East Rim Divide 7930 .0 5.0 0 14.5 13.8 105 Grand Targhee 9260 47.6 45.9 104 38.5 36.5 105 Granite Creek 6770 6.8 3.2 212 23.8 22.4 106 Grassy Lake 7265 -M 23.9 * -M 40.9 * Gros Ventre Summit 8750 4.0 9.2 43 14.9 15.6 96 Gunsight Pass 9820 14.3 12.4 115 19.2 17.3 111 Lewis Lake Divide 7850 28.4 27.9 102 43.5 40.1 108 Phillips Bench 8200 23.7 22.5 105 36.2 32.3 112 Salt River Summit 7640 3.7 2.7 137 19.3 19.4 99 Snake River Station 6920 2.3 .6 383* 28.6 25.8 111 Spring Creek Divide 9000 23.2 23.1 100 27.6 27.5 100 Thumb Divide 7980 10.3 6.8 151 22.4 22.1 101 Togwotee Pass 9580 25.1 25.1 100 29.2 29.0 101 Two Ocean Plateau 9240 31.7 29.4 108 30.0 32.0 94 Willow Creek 8080 23.0 20.2 114 41.1 39.9 103 Younts Peak 8350 -M 14.5 * -M 18.9 * ----- ----- Basin Index (%) 108 105 MADISON-GALLATIN Black Bear 8170 42.4 36.5 116 49.8 43.6 114 Canyon 7870 8.9 6.3 141 19.0 19.2 99 Madison Plateau 7750 24.6 18.4 134 32.3 30.3 107 West Yellowstone 6700 .0 .0 * 19.9 16.9 118 Whiskey Creek 6800 12.6 9.5 133 24.7 23.4 106 ----- ----- Basin Index (%) 125 109 YELLOWSTONE Beartooth Lake 9360 25.4 22.8 111 24.6 23.5 105 Burnt Mtn 5880 .0 .0 * 20.1 18.7 107 Canyon 7870 8.9 6.3 141 19.0 19.2 99 Cole Creek 7850 20.5 17.1 120 -M 18.8 * Evening Star 9200 28.5 25.5 112 35.2 32.3 109 Fisher Creek 9100 36.0 34.4 105 41.6 37.2 112 Northeast Entrance 7350 .1 .5 20* 17.3 14.9 116 Parker Peak 9400 28.1 22.0 128 29.2 21.6 135 Sylvan Lake 8420 17.4 17.5 99 31.8 26.8 119 Thumb Divide 7980 10.3 6.8 151 22.4 22.1 101 Two Ocean Plateau 9240 31.7 29.4 108 30.0 32.0 94 White Mill 8700 26.4 24.8 106 24.8 28.0 89 Wolverine 7650 .0 .0 * 16.0 15.0 107 Younts Peak 8350 -M 14.5 * -M 18.9 * ----- ----- Basin Index (%) 113 107 WIND RIVER Burroughs Creek 8750 6.2 -M * 17.0 -M * Castle Creek 8400 .0 -M * 9.1 -M * Cold Springs 9630 3.0 .8 375 12.3 13.9 88 Deer Park 9700 15.4 14.2 108 23.4 25.4 92 Hobbs Park 10100 19.1 15.6 122 18.2 18.5 98 Kirwin 9550 9.3 10.7 87 14.6 15.2 96 Little Warm 9370 6.6 6.5 102 11.3 16.8 67 Owl Creek 8975 .1 .3 33* 9.9 9.1 109 South Pass 9040 12.7 10.9 117 17.1 21.9 78 St. Lawrence Alt 8620 -M .4 * -M 13.0 * Togwotee Pass 9580 25.1 25.1 100 29.2 29.0 101 Townsend Creek 8700 9.4 2.3 409 16.6 16.5 101 ----- ----- Basin Index (%) 117 92 BIGHORN BASIN Bald Mtn. 9380 20.9 20.8 100 17.5 21.5 81 Bear Trap Meadow 8200 .0 .0 * 9.2 12.0 77 Bone Springs Div 9350 16.7 16.3 102 16.1 20.1 80 Grave Springs 8550 6.3 7.1 89 11.7 14.6 80 Kirwin 9550 9.3 10.7 87 14.6 15.2 96 Marquette 8760 7.7 -M * 13.1 -M * Middle Powder 7760 4.4 9.9 44 11.2 15.7 71 Owl Creek 8975 .1 .3 33* 9.9 9.1 109 Powder River Pass 9480 6.1 8.7 70 -M 16.6 * Shell Creek 9580 16.4 16.8 98 13.9 18.0 77 Timber Creek 7950 .2 .8 25 10.2 11.6 88 ----- ----- Basin Index (%) 88 83 SHOSHONE RIVER Blackwater 9780 29.3 24.6 119 30.4 25.1 121 Evening Star 9200 28.5 25.5 112 35.2 32.3 109 Marquette 8760 7.7 -M * 13.1 -M * Sylvan Lake 8420 17.4 17.5 99 31.8 26.8 119 Sylvan Road 7120 .0 .2 0* 19.1 19.6 97 Younts Peak 8350 -M 14.5 * -M 18.9 * ----- ----- Basin Index (%) 111 112 POWDER RIVER Bear Trap Meadow 8200 .0 .0 * 9.2 12.0 77 Cloud Peak Reservoir 9860 14.2 16.6 86 15.2 18.8 81 Grave Springs 8550 6.3 7.1 89 11.7 14.6 80 Hansen Sawmill 8360 1.1 .4 275* 10.7 12.3 87 Middle Powder 7760 4.4 9.9 44 11.2 15.7 71 Powder River Pass 9480 6.1 8.7 70 -M 16.6 * Soldier Park 8720 .1 -M * 9.8 -M * ----- ----- Basin Index (%) 75 79 TONGUE RIVER Big Goose 7990 9.3 9.6 97 15.1 16.5 92 Bone Springs Div 9350 16.7 16.3 102 16.1 20.1 80 Burgess Junction 7880 9.2 11.2 82 12.4 16.4 76 Dome Lake 8880 8.9 10.7 83 13.7 18.4 74 Little Goose 8870 11.6 -M * 11.4 -M * Sucker Creek 8880 12.3 12.2 101 15.3 19.5 78 Tie Creek 6870 1.7 .6 283 15.9 16.7 95 ----- ----- Basin Index (%) 96 82 BELLE FOURCHE Blind Park 6890 .0 .0 * 10.1 16.0 63 Cole Canyon 5910 .0 .0 * 15.9 14.2 112 ----- ----- Basin Index (%) * 86 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 10.1 16.0 63 North Rapid Creek 6130 -M .0 * -M 14.1 * ----- ----- Basin Index (%) * 63 UPPER N. PLATTE Arapaho Ridge 10960 25.1 22.1 114 30.8 28.0 110 Blackhall Mtn 9820 33.0 -M * 39.0 -M * Columbine 9160 13.1 10.3 127 33.0 29.9 110 Divide Peak 8880 12.5 12.2 102 28.3 25.8 110 Joe Wright 10120 22.2 23.1 96 35.0 31.9 110 Laprele Creek 8375 2.2 .6 367* 17.4 16.3 107 Med Bow 10500 42.0 -M * 41.3 -M * Never Summer 10280 24.7 22.2 111 23.0 -M * North French Creek 10130 31.6 32.3 98 35.4 32.8 108 Old Battle 10000 40.5 36.4 111 43.0 41.3 104 Rawah 9020 3.0 1.8 167 20.5 18.6 110 Sage Creek Basin 7850 2.1 .0 * 19.3 17.1 113 Sand Lake 10050 32.5 31.3 104 30.0 31.0 97 South Brush Creek 8440 .0 2.8 0 15.5 19.4 80 Tower 10500 55.7 50.7 110 53.2 47.0 113 Webber Springs 9250 21.4 17.7 121 36.5 31.5 116 Whiskey Park 8950 26.6 25.6 104 38.1 33.3 114 Willow Creek Pass 9540 17.0 12.2 139 21.1 16.7 126 Zirkel 9340 23.6 18.3 129 43.2 33.1 131 ----- ----- Basin Index (%) 111 110 SWEETWATER Deer Park 9700 15.4 14.2 108 23.4 25.4 92 Larsen Creek 9000 .1 5.6 2 16.9 -M * South Pass 9040 12.7 10.9 117 17.1 21.9 78 ----- ----- Basin Index (%) 92 86 LOWER N. PLATTE Casper Mtn. 7900 9.9 10.4 95 16.5 19.8 83 Laprele Creek 8375 2.2 .6 367* 17.4 16.3 107 Reno Hill 8400 13.7 8.9 154 21.9 20.6 106 Windy Peak 7900 1.1 .0 * 14.2 14.1 101 ----- ----- Basin Index (%) 135 99 LARAMIE RIVER Brooklyn Lake 10240 22.5 20.5 110 31.3 26.4 119 Cinnabar Park 9574 17.8 16.3 109 28.3 29.0 98 Crow Creek 8330 .0 .0 * 13.7 14.7 93 Deadman Hill 10220 21.7 18.4 118 24.4 22.1 110 Rawah 9020 3.0 1.8 167 20.5 18.6 110 Roach 9700 14.3 14.6 98 26.9 23.7 114 Windy Peak 7900 1.1 .0 * 14.2 14.1 101 ----- ----- Basin Index (%) 112 107 S. PLATTE Black Mountain 8920 5.7 -M * 17.9 -M * Crow Creek 8330 .0 .0 * 13.7 14.7 93 Deadman Hill 10220 21.7 18.4 118 24.4 22.1 110 ----- ----- Basin Index (%) 118* 104 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 20.1 18.3 110 Divide Peak 8880 12.5 12.2 102 28.3 25.8 110 Elk River 8700 7.8 5.2 150 23.5 24.1 98 Little Snake River 8915 22.9 19.3 119 43.5 34.8 125 Old Battle 10000 40.5 36.4 111 43.0 41.3 104 Sage Creek Basin 7850 2.1 .0 * 19.3 17.1 113 Sandstone RS 8150 1.3 .0 * 22.0 22.1 100 Whiskey Park 8950 26.6 25.6 104 38.1 33.3 114 ----- ----- Basin Index (%) 115 110 UPPER GREEN RIVER Big Sandy Opening 9080 11.2 8.4 133 18.1 16.4 110 Blind Bull Sum 8650 24.5 22.2 110 22.0 22.6 97 East Rim Divide 7930 .0 5.0 0 14.5 13.8 105 Elkhart Park G.S. 9400 12.4 9.2 135 17.2 16.3 106 Gros Ventre Summit 8750 4.0 9.2 43 14.9 15.6 96 Gunsight Pass 9820 14.3 12.4 115 19.2 17.3 111 Indian Creek 9425 20.2 21.3 95 22.0 26.5 83 Kendall R.S. 7740 .1 .0 * 14.4 16.4 88 Loomis Park 8240 8.5 6.5 131 20.2 20.1 100 New Fork Lake 8340 2.4 1.7 141 13.1 13.1 100 Pocket Creek 9360 13.4 -M * 17.9 -M * Snider Basin 8060 .0 6.4 0 15.8 16.5 96 Spring Creek Divide 9000 23.2 23.1 100 27.6 27.5 100 Triple Peak 8500 16.5 13.8 120 30.0 29.6 101 ----- ----- Basin Index (%) 99 99 LOWER GREEN RIVER Blacks Fork Jct 8869 .2 -M * 16.1 -M * Buck Pasture 9632 12.8 -M * 24.7 -M * EF Blacks Fork GS 9360 3.2 -M * 15.5 -M * Hams Fork 7840 .0 .0 * 15.2 14.1 108 Hewinta 9500 3.0 .3 1000* 18.5 17.3 107 Hickerson Park 9122 .9 .0 * 14.9 13.1 114 Hole-in-Rock 9168 .0 .0 * 14.3 12.6 113 Indian Creek 9425 20.2 21.3 95 22.0 26.5 83 Kelley R.S. 8180 6.9 7.4 93 19.2 21.4 90 Spirit Lk 10235 14.1 -M * 20.8 -M * Steel Creek Park 10158 16.8 17.2 98 23.3 20.5 114 ----- ----- Basin Index (%) 103* 102 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 18.6 -M * Bug Lake 7987 14.5 11.4 127 28.1 22.9 123 Burts Miller Ranch 8000 -M -M * 10.7 -M * Chalk Creek #1 9171 20.7 20.3 102 34.3 30.2 114 Hayden Fork 9130 5.2 4.5 116 27.8 25.3 110 Kelley R.S. 8180 6.9 7.4 93 19.2 21.4 90 Lily Lake 9133 6.6 2.8 236 20.1 20.9 96 Monte Cristo 8932 29.5 20.1 147 37.3 31.1 120 Salt River Summit 7640 3.7 2.7 137 19.3 19.4 99 Spring Creek Divide 9000 23.2 23.1 100 27.6 27.5 100 ----- ----- Basin Index (%) 120 108 ----------------------------------------------------------------------------- -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.