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 SUNDAY: MAY 23 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 .1 3.3 3 16.8 26.2 64 COTTONWOOD CREEK 7670 11.1 10.4 107 28.8 34.7 83 GRAND TARGHEE 9260 44.5 -M * 36.9 -M * GRANITE CREEK 6770 .0 5.0 0 15.8 24.1 66 GRASSY LAKE 7265 13.3 22.0 60 32.0 43.8 73 GROS VENTRE SUMMIT 8750 5.2 7.5 69 13.2 16.9 78 GUNSIGHT PASS 9820 11.0 -M * 16.0 -M * LEWIS LAKE DIVIDE 7850 13.5 24.9 54 26.9 44.3 61 PHILLIPS BENCH 8200 12.8 20.2 63 25.2 35.6 71 SALT RIVER SUMMIT 7760 .5 1.5 33 16.8 23.4 72 SNAKE RIVER STATION 6920 .0 2.1 0 20.0 27.5 73 SPRING CREEK DIVIDE 9000 20.9 21.2 99 24.4 32.3 76 THUMB DIVIDE 7980 .0 6.6 0 16.9 24.0 70 TOGWOTEE PASS 9580 22.9 25.8 89 -M 31.6 * TWO OCEAN PLATEAU 9240 25.1 29.0 87 23.0 35.1 66 WILLOW CREEK 8380 19.1 21.2 90 37.0 41.2 90 ----- ----- Basin wide percent of average 72 73 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 17.0 24.0 71 18.3 26.0 70 BLACK BEAR 8170 22.6 33.3 68 32.5 49.0 66 CANYON 7870 2.3 4.3 53 14.8 19.6 76 FISHER CREEK 9100 24.9 34.0 73 30.2 45.2 67 MADISON PLATEAU 7750 11.9 15.6 76 25.8 33.0 78 NORTHEAST ENTRANCE 7350 .0 1.3 0 12.3 16.7 74 PARKER PEAK 9400 18.1 22.5 80 17.3 22.0 79 SYLVAN LAKE 8420 11.0 17.0 65 23.5 27.6 85 THUMB DIVIDE 7980 .0 6.6 0 16.9 24.0 70 TWO OCEAN PLATEAU 9240 25.1 29.0 87 23.0 35.1 66 WHISKEY CREEK 6800 3.1 6.1 51 16.5 26.3 63 WHITE MILL 8700 16.6 22.5 74 20.8 34.0 61 WOLVERINE 7650 .0 1.1 0* 9.9 17.4 57 ----- ----- Basin wide percent of average 70 70 WIND RIVER BURROUGHS CREEK 8750 9.4 7.6 124 -M 21.6 * COLD SPRINGS 9630 7.5 1.6 469 18.6 16.2 115 DEER PARK 9700 21.5 15.1 142 28.3 29.8 95 HOBBS PARK 10100 26.0 14.6 178 27.9 19.9 140 LITTLE WARM 9370 8.5 4.9 173 15.2 19.1 80 SOUTH PASS 9040 17.9 10.3 174 26.2 25.2 104 ST. LAWRENCE ALT 8620 6.6 1.5 440 19.8 14.3 138 TOGWOTEE PASS 9580 22.9 25.8 89 -M 31.6 * TOWNSEND CREEK 8700 14.0 3.5 400 24.8 17.9 139 ----- ----- Basin wide percent of average 158 113 BIGHORN BASIN BALD MTN. 9380 17.3 21.2 82 16.4 24.3 67 BEAR TRAP MEADOW 8200 .8 .0 * 13.4 13.2 102 BLACKWATER 9780 22.4 28.3 79 22.6 27.5 82 BONE SPRINGS DIV 9350 13.2 13.4 99 16.1 21.1 76 EVENING STAR 9200 18.5 30.6 60 26.6 33.0 81 GRAVE SPRINGS 8550 9.3 3.6 258 17.5 15.3 114 KIRWIN 9550 11.6 9.2 126 16.5 16.5 100 MARQUETTE 8760 12.8 7.0 183 18.0 16.7 108 MIDDLE POWDER 7760 10.1 7.2 140 13.7 18.2 75 OWL CREEK 8975 .1 1.2 8 11.9 10.2 117 POWDER RIVER PASS 9480 6.2 5.4 115 15.4 18.5 83 SHELL CREEK 9580 14.5 14.3 101 16.9 19.4 87 SYLVAN LAKE 8420 11.0 17.0 65 23.5 27.6 85 SYLVAN ROAD 7120 .0 .7 0* 16.7 22.5 74 TIMBER CREEK 7950 2.2 1.3 169 14.4 13.3 108 YOUNTS PEAK 8350 9.3 12.4 75 13.7 21.0 65 ----- ----- Basin wide percent of average 92 86 SHOSHONE RIVER BLACKWATER 9780 22.4 28.3 79 22.6 27.5 82 EVENING STAR 9200 18.5 30.6 60 26.6 33.0 81 KIRWIN 9550 11.6 9.2 126 16.5 16.5 100 MARQUETTE 8760 12.8 7.0 183 18.0 16.7 108 SYLVAN LAKE 8420 11.0 17.0 65 23.5 27.6 85 SYLVAN ROAD 7120 .0 .7 0* 16.7 22.5 74 YOUNTS PEAK 8350 9.3 12.4 75 13.7 21.0 65 ----- ----- Basin wide percent of average 81 83 POWDER-TONGUE BEAR TRAP MEADOW 8200 .8 .0 * 13.4 13.2 102 BIG GOOSE 7990 10.6 7.3 145 18.8 15.5 121 BONE SPRINGS DIV 9350 13.2 13.4 99 16.1 21.1 76 BURGESS JUNCTION 7880 11.8 7.2 164 17.1 17.7 97 CLOUD PEAK RESERVOIR 9860 17.5 12.3 142 20.0 20.4 98 DOME LAKE 8880 11.7 7.2 163 19.8 19.6 101 GRAVE SPRINGS 8550 9.3 3.6 258 17.5 15.3 114 HANSEN SAWMILL 8360 1.6 .9 178 14.4 13.1 110 MIDDLE POWDER 7760 10.1 7.2 140 13.7 18.2 75 POWDER RIVER PASS 9480 6.2 5.4 115 15.4 18.5 83 SUCKER CREEK 8880 15.5 7.6 204 22.0 20.4 108 TIE CREEK 6870 2.6 .2 1300* 19.0 16.2 117 ----- ----- Basin wide percent of average 153 99 BELLE FOURCHE BLIND PARK 6890 .2 .0 * 18.9 16.8 113 COLE CANYON 5910 .0 .0 100* 17.8 11.9 150 NORTH RAPID CREEK 6130 .2 .1 200* 17.8 13.2 135 ----- ----- Basin wide percent of average 400* 130 UPPER N. PLATTE RIVER COLUMBINE 9160 11.4 8.0 143 30.6 31.4 97 DIVIDE PEAK 8880 15.3 8.7 176 31.8 26.6 120 ELK RIVER 8700 7.1 4.2 169 27.2 25.2 108 JOE WRIGHT 10120 24.3 21.8 111 31.3 33.5 93 NORTH FRENCH CREEK 10130 43.2 30.4 142 45.3 33.0 137 OLD BATTLE 10000 42.6 32.3 132 47.3 43.1 110 SAGE CREEK BASIN 7850 .0 5.0 0 17.6 15.4 114 SOUTH BRUSH CREEK 8440 6.5 4.2 155 27.2 22.7 120 TOWER 10500 44.1 49.2 90 45.4 48.7 93 WEBBER SPRINGS 9250 21.4 13.2 162 36.8 33.7 109 WILLOW CREEK PASS 9540 11.7 7.9 148 18.5 17.8 104 ----- ----- Basin wide percent of average 123 108 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.1 18.7 124 30.3 30.0 101 CASPER MTN. 7900 11.1 8.2 135 21.3 22.8 93 DEADMAN HILL 10220 -M 15.8 * -M 23.7 * DEER PARK 9700 21.5 15.1 142 28.3 29.8 95 LAPRELE CREEK 8375 .4 2.1 19 19.2 19.1 101 RENO HILL 8400 15.1 6.7 225 26.9 23.5 114 ROACH 9700 19.6 10.2 192 29.8 25.3 118 SAND LAKE 10050 39.8 32.7 122 41.4 32.9 126 SOUTH PASS 9040 17.9 10.3 174 26.2 25.2 104 WINDY PEAK 7900 .9 .8 113* 19.1 16.0 119 ----- ----- Basin wide percent of average 143 108 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100* 20.3 20.3 100 DIVIDE PEAK 8880 15.3 8.7 176 31.8 26.6 120 OLD BATTLE 10000 42.6 32.3 132 47.3 43.1 110 SANDSTONE RS 8150 -M 1.7 * 23.4 24.0 98 WHISKEY PARK 8950 28.6 22.1 129 40.9 36.8 111 ----- ----- Basin wide percent of average 137 109 UPPER GREEN RIVER BIG SANDY OPENING 9080 4.4 6.1 72 13.3 17.8 75 BLIND BULL SUM 8650 18.1 22.5 80 17.4 27.2 64 EAST RIM DIVIDE 7930 .1 6.3 2 9.9 15.4 64 ELKHART PARK G.S. 9400 4.9 7.1 69 12.3 18.1 68 GROS VENTRE SUMMIT 8750 5.2 7.5 69 13.2 16.9 78 GUNSIGHT PASS 9820 11.0 -M * 16.0 -M * KENDALL R.S. 7740 .1 .0 * 11.9 18.0 66 LOOMIS PARK 8240 .4 6.8 6 14.0 21.7 65 NEW FORK LAKE 8340 .0 1.2 0 9.0 15.1 60 POCKET CREEK 9360 7.4 -M * 14.8 -M * SNIDER BASIN 8060 2.7 4.5 60 16.2 19.9 81 SPRING CREEK DIVIDE 9000 20.9 21.2 99 24.4 32.3 76 TRIPLE PEAK 8500 13.7 12.4 110 27.7 31.0 89 ----- ----- Basin wide percent of average 74 73 LOWER GREEN RIVER HAMS FORK 7840 .3 .0 * 15.0 16.3 92 HEWINTA 9519 3.9 2.3 170 17.9 19.6 91 HICKERSON PARK 9145 .3 .7 43* 15.8 11.9 133 HOLE-IN-ROCK 9150 .0 .6 0* 15.3 11.5 133 INDIAN CREEK 9425 20.3 20.4 100 23.7 31.6 75 KELLEY R.S. 8180 5.8 6.1 95 19.0 25.4 75 STEEL CREEK PARK 10200 20.8 16.1 129 22.5 22.3 101 ----- ----- Basin wide percent of average 111 93 UPPER BEAR RIVER BUG LAKE 7950 8.1 7.0 116 20.2 24.3 83 HAYDEN FORK 9212 1.4 4.5 31 24.4 27.5 89 KELLEY R.S. 8180 5.8 6.1 95 19.0 25.4 75 LILY LAKE 9156 8.0 4.0 200 20.6 23.2 89 MONTE CRISTO 8960 17.6 18.8 94 26.6 33.1 80 SALT RIVER SUMMIT 7760 .5 1.5 33 16.8 23.4 72 TRIAL LAKE 9992 18.6 20.1 93 22.2 32.2 69 ----- ----- Basin wide percent of average 97 79 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Average Snow Water Equivalent and Total Precipitation values If the Basin wide percent of average 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 Average represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the average 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. Reference period for average conditions is 1971-2000. Provisional data, subject to revision. ---------------------------------------------------------------------------- -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.