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 21 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 7.1 3.8 187 31.2 26.1 120 COTTONWOOD CREEK 7670 14.0 11.0 127 29.7 34.6 86 GRAND TARGHEE 9260 55.8 -M * 42.1 -M * GRANITE CREEK 6770 7.0 5.4 130 25.7 24.0 107 GRASSY LAKE 7265 26.9 22.7 119 50.0 43.6 115 GROS VENTRE SUMMIT 8750 5.3 7.9 67 16.7 16.8 99 GUNSIGHT PASS 9820 7.2 -M * 18.1 -M * LEWIS LAKE DIVIDE 7850 28.6 25.5 112 42.5 44.2 96 PHILLIPS BENCH 8200 23.0 20.8 111 39.5 35.5 111 SALT RIVER SUMMIT 7760 .7 2.0 35 18.9 23.3 81 SNAKE RIVER STATION 6920 3.4 2.6 131 31.7 27.4 116 SPRING CREEK DIVIDE 9000 16.9 21.7 78 27.5 32.2 85 THUMB DIVIDE 7980 6.9 7.1 97 24.3 23.9 102 TOGWOTEE PASS 9580 28.1 26.0 108 35.5 31.5 113 TWO OCEAN PLATEAU 9240 41.3 29.3 141 38.3 34.9 110 WILLOW CREEK 8380 22.3 21.9 102 46.5 41.1 113 ----- ----- Basin wide percent of average 111 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 26.9 24.2 111 29.1 25.9 112 BLACK BEAR 8170 42.9 33.9 127 49.5 48.8 101 CANYON 7870 10.5 4.7 223 24.5 19.5 126 FISHER CREEK 9100 -M 34.5 * 45.3 45.1 100 MADISON PLATEAU 7750 25.1 16.3 154 37.9 32.9 115 NORTHEAST ENTRANCE 7350 .2 1.5 13 16.6 16.6 100 PARKER PEAK 9400 27.3 22.8 120 -M 21.9 * SYLVAN LAKE 8420 20.1 17.6 114 32.2 27.4 118 THUMB DIVIDE 7980 6.9 7.1 97 24.3 23.9 102 TWO OCEAN PLATEAU 9240 41.3 29.3 141 38.3 34.9 110 WHISKEY CREEK 6800 14.0 6.6 212 29.2 26.2 111 WHITE MILL 8700 26.9 23.0 117 32.5 33.8 96 WOLVERINE 7650 .0 1.5 0 17.7 17.3 102 ----- ----- Basin wide percent of average 128 107 WIND RIVER BURROUGHS CREEK 8750 10.3 8.2 126 21.3 21.5 99 COLD SPRINGS 9630 -M 2.0 * 13.6 16.1 84 DEER PARK 9700 13.4 15.9 84 25.1 29.7 85 HOBBS PARK 10100 14.2 15.1 94 20.4 19.7 104 LITTLE WARM 9370 1.0 5.4 19 17.7 19.0 93 SOUTH PASS 9040 7.8 11.0 71 21.8 25.1 87 ST. LAWRENCE ALT 8620 .2 1.9 11 12.0 14.2 85 TOGWOTEE PASS 9580 28.1 26.0 108 35.5 31.5 113 TOWNSEND CREEK 8700 .5 3.9 13 16.2 17.8 91 ----- ----- Basin wide percent of average 86 94 BIGHORN BASIN BALD MTN. 9380 16.8 21.6 78 20.7 24.1 86 BEAR TRAP MEADOW 8200 .1 .0 13.0 13.1 99 BLACKWATER 9780 28.1 28.5 99 30.1 27.4 110 BONE SPRINGS DIV 9350 15.1 14.0 108 23.8 21.0 113 EVENING STAR 9200 27.3 31.0 88 40.4 32.8 123 GRAVE SPRINGS 8550 7.5 4.4 170 14.5 15.2 95 KIRWIN 9550 8.0 9.7 82 18.0 16.4 110 MARQUETTE 8760 4.4 7.4 59 14.9 16.6 90 MIDDLE POWDER 7760 9.4 7.9 119 14.2 18.1 78 OWL CREEK 8975 .2 1.4 14 9.3 10.1 92 POWDER RIVER PASS 9480 7.9 5.8 136 19.1 18.4 104 SHELL CREEK 9580 17.0 14.8 115 20.9 19.3 108 SYLVAN LAKE 8420 20.1 17.6 114 32.2 27.4 118 SYLVAN ROAD 7120 .0 1.1 0 24.3 22.4 108 TIMBER CREEK 7950 .3 1.5 20 12.4 13.1 95 YOUNTS PEAK 8350 12.8 13.0 98 20.6 20.9 99 ----- ----- Basin wide percent of average 97 104 SHOSHONE RIVER BLACKWATER 9780 28.1 28.5 99 30.1 27.4 110 EVENING STAR 9200 27.3 31.0 88 40.4 32.8 123 KIRWIN 9550 8.0 9.7 82 18.0 16.4 110 MARQUETTE 8760 4.4 7.4 59 14.9 16.6 90 SYLVAN LAKE 8420 20.1 17.6 114 32.2 27.4 118 SYLVAN ROAD 7120 .0 1.1 0 24.3 22.4 108 YOUNTS PEAK 8350 12.8 13.0 98 20.6 20.9 99 ----- ----- Basin wide percent of average 93 110 POWDER-TONGUE BEAR TRAP MEADOW 8200 .1 .0 13.0 13.1 99 BIG GOOSE 7990 6.9 7.6 91 18.2 15.4 118 BONE SPRINGS DIV 9350 15.1 14.0 108 23.8 21.0 113 BURGESS JUNCTION 7880 13.3 7.6 175 20.4 17.6 116 CLOUD PEAK RESERVOIR 9860 15.3 12.8 120 22.1 20.2 109 DOME LAKE 8880 8.5 7.8 109 21.3 19.5 109 GRAVE SPRINGS 8550 7.5 4.4 170 14.5 15.2 95 HANSEN SAWMILL 8360 .3 1.0 30 13.2 13.0 102 MIDDLE POWDER 7760 9.4 7.9 119 14.2 18.1 78 POWDER RIVER PASS 9480 7.9 5.8 136 19.1 18.4 104 SUCKER CREEK 8880 14.7 8.1 181 24.7 20.3 122 TIE CREEK 6870 .3 .5 60 17.3 16.1 107 ----- ----- Basin wide percent of average 128 107 BELLE FOURCHE BLIND PARK 6890 -M .0 * 16.6 16.6 100 COLE CANYON 5910 .0 .1 0 14.7 11.8 125 NORTH RAPID CREEK 6130 -M .1 * 16.7 13.2 127 ----- ----- Basin wide percent of average 0* 115 UPPER N. PLATTE RIVER COLUMBINE 9160 15.4 8.7 177 35.2 31.3 112 DIVIDE PEAK 8880 14.7 9.3 158 29.2 26.5 110 ELK RIVER 8700 9.0 4.6 196 28.7 25.1 114 JOE WRIGHT 10120 26.0 22.2 117 36.8 33.4 110 NORTH FRENCH CREEK 10130 30.3 30.9 98 37.4 32.9 114 OLD BATTLE 10000 35.0 32.8 107 48.1 43.0 112 SAGE CREEK BASIN 7850 .3 5.4 6 20.6 15.4 134 SOUTH BRUSH CREEK 8440 .2 4.5 4 21.9 22.6 97 TOWER 10500 48.7 49.6 98 -M 48.6 * WEBBER SPRINGS 9250 19.9 13.9 143 37.9 33.6 113 WILLOW CREEK PASS 9540 18.5 8.4 220 21.5 17.7 121 ----- ----- Basin wide percent of average 115 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 15.9 19.3 82 28.3 29.9 95 CASPER MTN. 7900 11.1 8.7 128 21.4 22.7 94 DEADMAN HILL 10220 20.6 16.1 128 26.1 23.5 111 DEER PARK 9700 13.4 15.9 84 25.1 29.7 85 LAPRELE CREEK 8375 .0 2.3 0 16.5 19.0 87 RENO HILL 8400 13.1 7.1 185 26.6 23.4 114 ROACH 9700 17.4 10.6 164 28.8 25.1 115 SAND LAKE 10050 32.8 33.2 99 37.9 32.8 116 SOUTH PASS 9040 7.8 11.0 71 21.8 25.1 87 WINDY PEAK 7900 .8 .9 89 14.2 15.9 89 ----- ----- Basin wide percent of average 106 100 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100 20.7 20.2 102 DIVIDE PEAK 8880 14.7 9.3 158 29.2 26.5 110 OLD BATTLE 10000 35.0 32.8 107 48.1 43.0 112 SANDSTONE RS 8150 3.5 2.0 175 26.0 23.9 109 WHISKEY PARK 8950 31.7 22.8 139 43.6 36.7 119 ----- ----- Basin wide percent of average 127 112 UPPER GREEN RIVER BIG SANDY OPENING 9080 1.6 6.5 25 16.0 17.7 90 BLIND BULL SUM 8650 24.9 22.9 109 20.9 27.1 77 EAST RIM DIVIDE 7930 .0 6.7 0 12.9 15.3 84 ELKHART PARK G.S. 9400 3.0 7.4 41 14.4 18.0 80 GROS VENTRE SUMMIT 8750 5.3 7.9 67 16.7 16.8 99 GUNSIGHT PASS 9820 7.2 -M * 18.1 -M * KENDALL R.S. 7740 .1 .5 20 16.1 17.9 90 LOOMIS PARK 8240 2.0 7.2 28 20.5 21.7 94 NEW FORK LAKE 8340 .0 1.6 0 12.8 15.0 85 SNIDER BASIN 8060 .4 4.9 8 16.1 19.8 81 SPRING CREEK DIVIDE 9000 16.9 21.7 78 27.5 32.2 85 TRIPLE PEAK 8500 14.2 13.1 108 33.7 30.9 109 ----- ----- Basin wide percent of average 68 89 LOWER GREEN RIVER HAMS FORK 7840 .1 .0 13.0 16.3 80 HEWINTA 9519 -M 2.6 * 20.3 19.5 104 HICKERSON PARK 9145 .0 .9 0 11.4 11.8 97 HOLE-IN-ROCK 9150 .0 .7 0 12.0 11.4 105 INDIAN CREEK 9425 -M 20.9 * -M 31.5 * KELLEY R.S. 8180 4.8 6.5 74 21.4 25.4 84 STEEL CREEK PARK 10200 16.5 16.4 101 22.5 22.2 101 ----- ----- Basin wide percent of average 87 94 UPPER BEAR RIVER BUG LAKE 7950 8.4 7.5 112 20.3 24.3 84 HAYDEN FORK 9212 .2 4.8 4 27.6 27.4 101 KELLEY R.S. 8180 4.8 6.5 74 21.4 25.4 84 LILY LAKE 9156 1.0 4.3 23 21.7 23.1 94 MONTE CRISTO 8960 17.4 19.4 90 30.4 32.9 92 SALT RIVER SUMMIT 7760 .7 2.0 35 18.9 23.3 81 TRIAL LAKE 9992 13.1 20.5 64 28.8 32.1 90 ----- ----- Basin wide percent of average 70 90 ----------------------------------------------------------------------------- -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 1961-90. 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.