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 WEDNESDAY: MAY 29 , 2019 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Average Avg ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 .0 .0 * 26.2 25.4 103 Black Bear 8170 39.1 28.0 140 53.1 45.9 116 Blind Bull Sum 8650 23.1 14.2 163 25.0 24.1 104 Cottonwood Creek 7670 6.9 .0 * 34.1 31.1 110 East Rim Divide 7930 .0 .0 * 17.1 14.8 116 Grand Targhee 9260 46.0 40.8 113 41.5 38.2 109 Granite Creek 6770 .1 .0 * 26.9 23.8 113 Grassy Lake 7265 -M 8.3 * -M 43.3 * Gros Ventre Summit 8750 .0 .0 * 16.6 16.8 99 Gunsight Pass 9820 12.9 4.6 280 20.8 18.4 113 Lewis Lake Divide 7850 19.5 14.6 134 45.5 42.3 108 Phillips Bench 8200 18.8 12.1 155 39.0 33.9 115 Salt River Summit 7640 .0 .0 * 22.6 20.6 110 Snake River Station 6920 .0 .0 * 30.4 27.5 111 Spring Creek Divide 9000 21.3 13.6 157 30.1 28.9 104 Thumb Divide 7980 1.0 .0 * 23.9 23.6 101 Togwotee Pass 9580 25.1 20.6 122 31.7 30.7 103 Two Ocean Plateau 9240 28.8 26.5 109 31.7 34.1 93 Willow Creek 8080 17.6 6.4 275 45.4 42.2 108 Younts Peak 8350 -M 6.3 * -M 20.4 * ----- ----- Basin Index (%) 143 108 MADISON-GALLATIN Black Bear 8170 39.1 28.0 140 53.1 45.9 116 Canyon 7870 .5 .0 * 20.5 20.7 99 Madison Plateau 7750 18.2 9.0 202 35.3 32.8 108 West Yellowstone 6700 .0 .0 * 22.0 18.3 120 Whiskey Creek 6800 4.9 .0 * 27.0 25.3 107 ----- ----- Basin Index (%) 169* 110 YELLOWSTONE Beartooth Lake 9360 25.6 18.9 135 27.5 25.0 110 Burnt Mtn 5880 .0 .0 * -M 20.5 * Canyon 7870 .5 .0 * 20.5 20.7 99 Cole Creek 7850 20.8 11.4 182 23.7 21.0 113 Evening Star 9200 28.0 19.8 141 38.9 34.6 112 Fisher Creek 9100 34.3 29.2 117 44.4 39.7 112 Northeast Entrance 7350 .1 .0 * 19.1 16.4 116 Parker Peak 9400 26.6 15.9 167 32.0 23.5 136 Sylvan Lake 8420 13.2 9.6 138 34.0 29.0 117 Thumb Divide 7980 1.0 .0 * 23.9 23.6 101 Two Ocean Plateau 9240 28.8 26.5 109 31.7 34.1 93 White Mill 8700 23.5 18.9 124 27.2 30.1 90 Wolverine 7650 .0 .0 * 18.4 16.3 113 Younts Peak 8350 -M 6.3 * -M 20.4 * ----- ----- Basin Index (%) 135 109 WIND RIVER Burroughs Creek 8750 2.3 -M * 19.2 -M * Castle Creek 8400 .1 -M * 12.1 -M * Cold Springs 9630 3.5 .0 * 16.1 15.1 107 Deer Park 9700 14.5 5.4 269 26.2 26.9 97 Hobbs Park 10100 21.0 8.1 259 22.9 20.2 113 Kirwin 9550 10.2 3.6 283 19.9 16.7 119 Little Warm 9370 2.9 .0 * 12.5 18.2 69 Owl Creek 8975 -M .0 * 15.4 10.5 147 South Pass 9040 11.2 .7 1600* 20.2 23.4 86 St. Lawrence Alt 8620 -M .0 * -M 14.3 * Togwotee Pass 9580 25.1 20.6 122 31.7 30.7 103 Townsend Creek 8700 8.8 .0 * 21.2 17.9 118 ----- ----- Basin Index (%) 253* 104 BIGHORN BASIN Bald Mtn. 9380 22.5 15.3 147 21.8 23.2 94 Bear Trap Meadow 8200 .3 .0 * 13.4 13.6 99 Bone Springs Div 9350 16.8 10.8 156 19.5 22.0 89 Grave Springs 8550 4.2 .0 * 15.9 16.0 99 Kirwin 9550 10.2 3.6 283 19.9 16.7 119 Marquette 8760 -M -M * -M -M * Middle Powder 7760 2.3 .0 * 17.6 17.1 103 Owl Creek 8975 -M .0 * 15.4 10.5 147 Powder River Pass 9480 3.9 .0 * 15.1 18.4 82 Shell Creek 9580 16.7 11.2 149 17.8 19.6 91 Timber Creek 7950 4.2 .0 * 19.2 13.2 145 ----- ----- Basin Index (%) 198* 103 SHOSHONE RIVER Blackwater 9780 30.4 21.7 140 34.9 27.1 129 Evening Star 9200 28.0 19.8 141 38.9 34.6 112 Marquette 8760 -M -M * -M -M * Sylvan Lake 8420 13.2 9.6 138 34.0 29.0 117 Sylvan Road 7120 .1 .0 * 20.0 21.1 95 Younts Peak 8350 -M 6.3 * -M 20.4 * ----- ----- Basin Index (%) 140 114 POWDER RIVER Bear Trap Meadow 8200 .3 .0 * 13.4 13.6 99 Cloud Peak Reservoir 9860 16.6 8.4 198 21.5 20.9 103 Grave Springs 8550 4.2 .0 * 15.9 16.0 99 Hansen Sawmill 8360 3.4 .0 * 17.2 13.9 124 Middle Powder 7760 2.3 .0 * 17.6 17.1 103 Powder River Pass 9480 3.9 .0 * 15.1 18.4 82 Soldier Park 8720 3.3 -M * 15.4 -M * ----- ----- Basin Index (%) 365* 101 TONGUE RIVER Big Goose 7990 9.0 .0 * 21.3 18.1 118 Bone Springs Div 9350 16.8 10.8 156 19.5 22.0 89 Burgess Junction 7880 6.6 1.4 471 16.4 17.8 92 Dome Lake 8880 10.4 .0 * 19.9 20.1 99 Little Goose 8870 12.4 -M * 15.6 -M * Sucker Creek 8880 12.9 2.3 561 21.3 21.2 100 Tie Creek 6870 .8 .0 * 23.6 18.4 128 ----- ----- Basin Index (%) 390* 104 BELLE FOURCHE Blind Park 6890 .0 .0 * 11.8 18.0 66 Cole Canyon 5910 .0 .0 * -M 16.1 * ----- ----- Basin Index (%) * 66 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 11.8 18.0 66 North Rapid Creek 6130 -M .0 * 12.4 15.7 79 ----- ----- Basin Index (%) * 72 UPPER N. PLATTE Arapaho Ridge 10960 26.3 10.2 258 35.1 29.0 121 Blackhall Mtn 9820 29.3 -M * 42.2 -M * Columbine 9160 6.4 .0 * 36.0 31.3 115 Divide Peak 8880 5.6 .0 * 30.8 27.2 113 Joe Wright 10120 22.4 15.7 143 38.2 33.9 113 Laprele Creek 8375 .4 .0 * 20.2 17.7 114 Med Bow 10500 42.2 -M * 44.8 -M * Never Summer 10280 24.7 16.6 149 25.7 -M * North French Creek 10130 30.5 23.0 133 38.5 34.8 111 Old Battle 10000 41.1 26.5 155 46.4 43.2 107 Rawah 9020 1.4 .0 * 23.1 19.3 120 Sage Creek Basin 7850 -M .0 * 21.1 17.8 119 Sand Lake 10050 32.4 22.1 147 32.5 32.8 99 South Brush Creek 8440 .1 .0 * 17.3 20.9 83 Tower 10500 58.0 40.1 145 57.3 48.9 117 Webber Springs 9250 17.9 1.1 1627* 40.0 32.8 122 Whiskey Park 8950 -M 10.2 * -M 34.6 * Willow Creek Pass 9540 12.2 1.9 642 22.6 18.2 124 Zirkel 9340 15.5 .0 * 46.0 33.8 136 ----- ----- Basin Index (%) 188* 114 SWEETWATER Deer Park 9700 14.5 5.4 269 26.2 26.9 97 Larsen Creek 9000 .0 .9 0* 18.2 -M * South Pass 9040 11.2 .7 1600* 20.2 23.4 86 ----- ----- Basin Index (%) 367* 92 LOWER N. PLATTE Casper Mtn. 7900 7.8 .0 * 22.6 21.4 106 Laprele Creek 8375 .4 .0 * 20.2 17.7 114 Reno Hill 8400 11.0 .0 * 26.7 22.4 119 Windy Peak 7900 .9 .0 * 15.6 15.8 99 ----- ----- Basin Index (%) * 110 LARAMIE RIVER Brooklyn Lake 10240 18.9 8.0 236 33.7 28.1 120 Cinnabar Park 9574 14.9 3.7 403 31.2 30.1 104 Crow Creek 8330 -M .0 * 16.1 15.9 101 Deadman Hill 10220 16.9 10.3 164 25.7 23.8 108 Rawah 9020 1.4 .0 * 23.1 19.3 120 Roach 9700 9.9 3.9 254 30.0 25.4 118 Windy Peak 7900 .9 .0 * 15.6 15.8 99 ----- ----- Basin Index (%) 243 111 S. PLATTE Black Mountain 8920 .7 -M * 19.5 -M * Crow Creek 8330 -M .0 * 16.1 15.9 101 Deadman Hill 10220 16.9 10.3 164 25.7 23.8 108 ----- ----- Basin Index (%) 164* 105 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 22.4 19.1 117 Divide Peak 8880 5.6 .0 * 30.8 27.2 113 Elk River 8700 .5 .0 * 25.6 25.2 102 Little Snake River 8915 17.5 4.1 427 46.6 35.9 130 Old Battle 10000 41.1 26.5 155 46.4 43.2 107 Sage Creek Basin 7850 -M .0 * 21.1 17.8 119 Sandstone RS 8150 .0 .0 * 23.4 23.1 101 Whiskey Park 8950 -M 10.2 * -M 34.6 * ----- ----- Basin Index (%) 211* 113 UPPER GREEN RIVER Big Sandy Opening 9080 5.7 .0 * 19.5 17.7 110 Blind Bull Sum 8650 23.1 14.2 163 25.0 24.1 104 East Rim Divide 7930 .0 .0 * 17.1 14.8 116 Elkhart Park G.S. 9400 10.7 1.0 1070* 20.4 17.6 116 Gros Ventre Summit 8750 .0 .0 * 16.6 16.8 99 Gunsight Pass 9820 12.9 4.6 280 20.8 18.4 113 Indian Creek 9425 20.7 12.6 164 26.4 27.8 95 Kendall R.S. 7740 .0 .0 * 16.8 17.4 97 Loomis Park 8240 2.5 .0 * 23.2 21.3 109 New Fork Lake 8340 .0 .0 * 15.9 14.3 111 Pocket Creek 9360 9.7 -M * 19.2 -M * Snider Basin 8060 .0 .0 * 18.4 17.4 106 Spring Creek Divide 9000 21.3 13.6 157 30.1 28.9 104 Triple Peak 8500 -M .1 * -M 31.2 * ----- ----- Basin Index (%) 211* 106 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 18.2 -M * Buck Pasture 9632 8.5 -M * 27.4 -M * EF Blacks Fork GS 9360 .1 -M * 18.5 -M * Hams Fork 7840 .1 .0 * 19.3 15.0 129 Hewinta 9500 .0 .0 * 20.9 18.4 114 Hickerson Park 9122 .1 .0 * 17.7 14.2 125 Hole-in-Rock 9168 .0 .0 * 17.4 13.7 127 Indian Creek 9425 20.7 12.6 164 26.4 27.8 95 Kelley R.S. 8180 4.2 .0 * 23.7 22.6 105 Spirit Lk 10235 13.6 -M * 24.6 -M * Steel Creek Park 10158 16.8 10.5 160 26.6 21.7 123 ----- ----- Basin Index (%) 181* 114 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 20.4 -M * Bug Lake 7987 9.0 .0 * 32.0 24.3 132 Burts Miller Ranch 8000 .0 -M * 11.3 -M * Chalk Creek #1 9171 19.1 8.1 236 37.8 31.7 119 Hayden Fork 9130 .0 .0 * 30.6 26.6 115 Kelley R.S. 8180 4.2 .0 * 23.7 22.6 105 Lily Lake 9133 .0 .0 * 22.3 22.1 101 Monte Cristo 8932 28.4 6.3 451 41.6 32.5 128 Salt River Summit 7640 .0 .0 * 22.6 20.6 110 Spring Creek Divide 9000 21.3 13.6 157 30.1 28.9 104 ----- ----- Basin Index (%) 293* 115 ----------------------------------------------------------------------------- -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.