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 27 , 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 25.2 104 Black Bear 8170 39.8 29.9 133 52.8 45.6 116 Blind Bull Sum 8650 22.2 15.8 141 24.3 23.9 102 Cottonwood Creek 7670 8.4 .3 2800* 33.6 30.9 109 East Rim Divide 7930 .0 .0 * 16.5 14.7 112 Grand Targhee 9260 46.3 41.1 113 41.5 38.1 109 Granite Creek 6770 .1 .0 * 26.6 23.6 113 Grassy Lake 7265 -M 10.3 * -M 42.9 * Gros Ventre Summit 8750 .0 .9 0* 16.3 16.6 98 Gunsight Pass 9820 12.7 5.8 219 20.4 18.2 112 Lewis Lake Divide 7850 21.2 16.7 127 45.6 42.0 109 Phillips Bench 8200 19.8 13.6 146 38.6 33.6 115 Salt River Summit 7640 .0 .0 * 22.2 20.5 108 Snake River Station 6920 .0 .0 * 30.4 27.2 112 Spring Creek Divide 9000 21.5 15.1 142 29.7 28.7 103 Thumb Divide 7980 2.8 .0 * 23.8 23.4 102 Togwotee Pass 9580 24.8 21.7 114 31.3 30.5 103 Two Ocean Plateau 9240 29.0 27.4 106 31.6 33.8 93 Willow Creek 8080 18.9 8.6 220 44.7 41.9 107 Younts Peak 8350 -M 8.3 * -M 20.3 * ----- ----- Basin Index (%) 136 107 MADISON-GALLATIN Black Bear 8170 39.8 29.9 133 52.8 45.6 116 Canyon 7870 1.7 .0 * 20.2 20.5 99 Madison Plateau 7750 19.5 10.7 182 34.8 32.4 107 West Yellowstone 6700 .1 .0 * 21.6 18.1 119 Whiskey Creek 6800 6.3 1.1 573* 26.4 25.0 106 ----- ----- Basin Index (%) 162* 110 YELLOWSTONE Beartooth Lake 9360 25.3 19.8 128 26.8 24.8 108 Burnt Mtn 5880 .1 .0 * 24.5 20.4 120 Canyon 7870 1.7 .0 * 20.2 20.5 99 Cole Creek 7850 20.7 12.5 166 22.6 20.6 110 Evening Star 9200 27.3 20.9 131 37.8 34.4 110 Fisher Creek 9100 35.0 30.2 116 44.3 39.4 112 Northeast Entrance 7350 .1 .0 * 19.0 16.2 117 Parker Peak 9400 26.3 17.4 151 31.6 23.3 136 Sylvan Lake 8420 13.9 11.4 122 33.7 28.6 118 Thumb Divide 7980 2.8 .0 * 23.8 23.4 102 Two Ocean Plateau 9240 29.0 27.4 106 31.6 33.8 93 White Mill 8700 24.4 20.0 122 27.0 29.8 91 Wolverine 7650 .0 .0 * 17.5 16.1 109 Younts Peak 8350 -M 8.3 * -M 20.3 * ----- ----- Basin Index (%) 129 109 WIND RIVER Burroughs Creek 8750 2.0 -M * 18.5 -M * Castle Creek 8400 .0 -M * 10.8 -M * Cold Springs 9630 1.4 .0 * 14.0 15.0 93 Deer Park 9700 14.1 7.0 201 25.9 26.8 97 Hobbs Park 10100 19.4 9.6 202 21.5 20.0 108 Kirwin 9550 7.1 5.0 142 16.5 16.5 100 Little Warm 9370 1.9 .0 * 11.8 18.0 66 Owl Creek 8975 1.3 .0 * 12.2 10.3 118 South Pass 9040 10.9 1.5 727* 19.7 23.2 85 St. Lawrence Alt 8620 -M .0 * -M 14.1 * Togwotee Pass 9580 24.8 21.7 114 31.3 30.5 103 Townsend Creek 8700 8.2 .0 * 20.3 17.8 114 ----- ----- Basin Index (%) 199* 97 BIGHORN BASIN Bald Mtn. 9380 21.2 16.3 130 20.8 23.0 90 Bear Trap Meadow 8200 .1 .0 * 11.6 13.5 86 Bone Springs Div 9350 15.7 11.8 133 18.6 21.8 85 Grave Springs 8550 3.4 .0 * 13.9 15.9 87 Kirwin 9550 7.1 5.0 142 16.5 16.5 100 Marquette 8760 8.5 -M * 18.9 -M * Middle Powder 7760 2.4 .0 * 15.4 17.0 91 Owl Creek 8975 1.3 .0 * 12.2 10.3 118 Powder River Pass 9480 3.2 .2 1600* 13.9 18.2 76 Shell Creek 9580 16.0 12.6 127 17.0 19.4 88 Timber Creek 7950 2.4 .0 * 14.1 13.0 108 ----- ----- Basin Index (%) 159* 91 SHOSHONE RIVER Blackwater 9780 28.6 22.7 126 33.2 26.9 123 Evening Star 9200 27.3 20.9 131 37.8 34.4 110 Marquette 8760 8.5 -M * 18.9 -M * Sylvan Lake 8420 13.9 11.4 122 33.7 28.6 118 Sylvan Road 7120 .0 .0 * 19.7 20.9 94 Younts Peak 8350 -M 8.3 * -M 20.3 * ----- ----- Basin Index (%) 127 112 POWDER RIVER Bear Trap Meadow 8200 .1 .0 * 11.6 13.5 86 Cloud Peak Reservoir 9860 13.4 10.3 130 18.5 20.7 89 Grave Springs 8550 3.4 .0 * 13.9 15.9 87 Hansen Sawmill 8360 1.3 .0 * 13.9 13.8 101 Middle Powder 7760 2.4 .0 * 15.4 17.0 91 Powder River Pass 9480 3.2 .2 1600* 13.9 18.2 76 Soldier Park 8720 1.1 -M * 12.2 -M * ----- ----- Basin Index (%) 227* 88 TONGUE RIVER Big Goose 7990 8.0 .0 * 18.6 18.0 103 Bone Springs Div 9350 15.7 11.8 133 18.6 21.8 85 Burgess Junction 7880 6.6 3.0 220 14.7 17.7 83 Dome Lake 8880 8.5 .8 1062* 17.8 19.9 89 Little Goose 8870 10.7 -M * 13.9 -M * Sucker Creek 8880 11.0 4.0 275 18.8 21.1 89 Tie Creek 6870 1.6 .0 * 19.0 18.3 104 ----- ----- Basin Index (%) 262* 92 BELLE FOURCHE Blind Park 6890 .0 .0 * 11.3 17.8 63 Cole Canyon 5910 .1 .0 * 20.7 16.0 129 ----- ----- Basin Index (%) * 95 CHEYENNE RIVER BASIN Blind Park 6890 .0 .0 * 11.3 17.8 63 North Rapid Creek 6130 -M .0 * -M 15.5 * ----- ----- Basin Index (%) * 63 UPPER N. PLATTE Arapaho Ridge 10960 25.1 12.0 209 33.6 28.9 116 Blackhall Mtn 9820 28.5 -M * 40.7 -M * Columbine 9160 6.5 .0 * 35.2 31.1 113 Divide Peak 8880 4.9 .1 4900* 29.7 27.0 110 Joe Wright 10120 22.1 17.1 129 37.4 33.7 111 Laprele Creek 8375 .0 .0 * 19.3 17.6 110 Med Bow 10500 41.8 -M * 43.7 -M * Never Summer 10280 24.4 17.3 141 25.1 -M * North French Creek 10130 29.7 24.7 120 37.5 34.6 108 Old Battle 10000 40.2 28.2 143 45.8 43.1 106 Rawah 9020 .2 .0 * 21.8 19.3 113 Sage Creek Basin 7850 -M .0 * 20.3 17.7 115 Sand Lake 10050 31.5 23.6 133 31.6 32.6 97 South Brush Creek 8440 .0 .0 * 16.9 20.7 82 Tower 10500 57.3 42.6 135 56.8 48.7 117 Webber Springs 9250 17.3 4.0 432 38.8 32.6 119 Whiskey Park 8950 20.2 13.0 155 39.6 34.4 115 Willow Creek Pass 9540 12.3 3.9 315 22.1 18.0 123 Zirkel 9340 16.1 .0 * 45.2 33.8 134 ----- ----- Basin Index (%) 165 112 SWEETWATER Deer Park 9700 14.1 7.0 201 25.9 26.8 97 Larsen Creek 9000 .0 1.5 0 17.8 -M * South Pass 9040 10.9 1.5 727* 19.7 23.2 85 ----- ----- Basin Index (%) 250 91 LOWER N. PLATTE Casper Mtn. 7900 7.2 .3 2400* 20.2 21.2 95 Laprele Creek 8375 .0 .0 * 19.3 17.6 110 Reno Hill 8400 10.0 .0 * 25.1 22.2 113 Windy Peak 7900 .2 .0 * 15.1 15.6 97 ----- ----- Basin Index (%) 5800* 104 LARAMIE RIVER Brooklyn Lake 10240 18.5 10.0 185 33.2 27.9 119 Cinnabar Park 9574 14.0 5.5 255 29.9 30.0 100 Crow Creek 8330 .0 .0 * 15.0 15.8 95 Deadman Hill 10220 16.6 11.8 141 25.1 23.6 106 Rawah 9020 .2 .0 * 21.8 19.3 113 Roach 9700 8.9 5.6 159 28.5 25.3 113 Windy Peak 7900 .2 .0 * 15.1 15.6 97 ----- ----- Basin Index (%) 178 107 S. PLATTE Black Mountain 8920 .1 -M * 18.7 -M * Crow Creek 8330 .0 .0 * 15.0 15.8 95 Deadman Hill 10220 16.6 11.8 141 25.1 23.6 106 ----- ----- Basin Index (%) 141* 102 LITTLE SNAKE RIVER Battle Mountain 7440 .0 .0 * 21.4 19.0 113 Divide Peak 8880 4.9 .1 4900* 29.7 27.0 110 Elk River 8700 .0 .0 * 25.1 25.1 100 Little Snake River 8915 16.9 5.9 286 45.3 35.8 127 Old Battle 10000 40.2 28.2 143 45.8 43.1 106 Sage Creek Basin 7850 -M .0 * 20.3 17.7 115 Sandstone RS 8150 -M .0 * 23.0 23.0 100 Whiskey Park 8950 20.2 13.0 155 39.6 34.4 115 ----- ----- Basin Index (%) 174* 111 UPPER GREEN RIVER Big Sandy Opening 9080 6.6 .0 * 19.2 17.5 110 Blind Bull Sum 8650 22.2 15.8 141 24.3 23.9 102 East Rim Divide 7930 .0 .0 * 16.5 14.7 112 Elkhart Park G.S. 9400 10.5 2.1 500 19.3 17.4 111 Gros Ventre Summit 8750 .0 .9 0* 16.3 16.6 98 Gunsight Pass 9820 12.7 5.8 219 20.4 18.2 112 Indian Creek 9425 20.6 13.6 151 25.9 27.7 94 Kendall R.S. 7740 .0 .0 * 16.1 17.3 93 Loomis Park 8240 3.9 .0 * 22.3 21.1 106 New Fork Lake 8340 .0 .0 * 15.4 14.1 109 Pocket Creek 9360 10.2 -M * 19.0 -M * Snider Basin 8060 .0 .0 * 18.0 17.2 105 Spring Creek Divide 9000 21.5 15.1 142 29.7 28.7 103 Triple Peak 8500 -M 1.7 * -M 31.0 * ----- ----- Basin Index (%) 184* 104 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 17.4 -M * Buck Pasture 9632 8.7 -M * 27.0 -M * EF Blacks Fork GS 9360 .0 -M * 17.8 -M * Hams Fork 7840 .0 .0 * 18.6 14.9 125 Hewinta 9500 .0 .0 * 20.1 18.2 110 Hickerson Park 9122 .1 .0 * 17.2 14.1 122 Hole-in-Rock 9168 .1 .0 * 16.8 13.6 124 Indian Creek 9425 20.6 13.6 151 25.9 27.7 94 Kelley R.S. 8180 4.7 .0 * 23.0 22.4 103 Spirit Lk 10235 13.3 -M * 23.9 -M * Steel Creek Park 10158 16.0 11.2 143 25.6 21.6 119 ----- ----- Basin Index (%) 167* 111 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 20.2 -M * Bug Lake 7987 10.0 .0 * 31.5 24.1 131 Burts Miller Ranch 8000 .0 -M * 11.2 -M * Chalk Creek #1 9171 19.4 9.5 204 37.5 31.6 119 Hayden Fork 9130 .0 .0 * 30.2 26.4 114 Kelley R.S. 8180 4.7 .0 * 23.0 22.4 103 Lily Lake 9133 .1 .0 * 22.1 22.0 100 Monte Cristo 8932 29.0 7.9 367 41.3 32.4 127 Salt River Summit 7640 .0 .0 * 22.2 20.5 108 Spring Creek Divide 9000 21.5 15.1 142 29.7 28.7 103 ----- ----- Basin Index (%) 261* 114 ----------------------------------------------------------------------------- -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.