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 14 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 13.2 7.0 189 31.3 25.5 123 COTTONWOOD CREEK 7670 21.8 14.4 151 30.1 33.7 89 GRAND TARGHEE 9260 58.7 -M * 41.7 -M * GRANITE CREEK 6770 12.6 8.2 154 25.5 23.5 109 GRASSY LAKE 7265 33.3 27.1 123 49.9 42.7 117 GROS VENTRE SUMMIT 8750 11.6 10.2 114 16.9 16.3 104 GUNSIGHT PASS 9820 12.9 -M * 18.0 -M * LEWIS LAKE DIVIDE 7850 38.9 29.5 132 -M 43.3 * PHILLIPS BENCH 8200 30.4 24.6 124 39.4 34.7 114 SALT RIVER SUMMIT 7760 9.5 5.3 179 18.9 22.7 83 SNAKE RIVER STATION 6920 12.7 6.2 205 31.8 26.8 119 SPRING CREEK DIVIDE 9000 22.8 25.1 91 27.4 31.5 87 THUMB DIVIDE 7980 14.4 10.1 143 24.2 23.3 104 TOGWOTEE PASS 9580 31.3 27.5 114 35.2 30.7 115 TWO OCEAN PLATEAU 9240 -M 30.8 * -M 34.0 * WILLOW CREEK 8380 30.2 25.8 117 46.3 40.0 116 ----- ----- Basin wide percent of average 128 107 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 29.7 25.6 116 29.0 25.1 116 BLACK BEAR 8170 48.5 37.0 131 49.5 47.9 103 CANYON 7870 15.9 7.4 215 24.4 18.9 129 FISHER CREEK 9100 47.5 36.8 129 45.0 44.0 102 MADISON PLATEAU 7750 30.9 20.1 154 37.8 32.0 118 NORTHEAST ENTRANCE 7350 4.6 3.8 121 16.5 15.9 104 PARKER PEAK 9400 33.0 24.1 137 -M 21.1 * SYLVAN LAKE 8420 21.8 20.8 105 32.1 26.5 121 THUMB DIVIDE 7980 14.4 10.1 143 24.2 23.3 104 TWO OCEAN PLATEAU 9240 -M 30.8 * -M 34.0 * WHISKEY CREEK 6800 18.8 10.3 183 29.2 25.5 115 WHITE MILL 8700 32.0 24.9 129 32.3 33.0 98 WOLVERINE 7650 5.5 3.5 157 17.4 16.6 105 ----- ----- Basin wide percent of average 135 109 WIND RIVER BURROUGHS CREEK 8750 15.1 10.6 142 21.3 20.8 102 COLD SPRINGS 9630 .5 3.5 14 13.3 15.4 86 DEER PARK 9700 16.1 17.3 93 24.6 28.7 86 HOBBS PARK 10100 17.2 16.9 102 19.6 18.8 104 LITTLE WARM 9370 8.2 8.0 102 17.6 18.3 96 SOUTH PASS 9040 13.6 14.4 94 21.5 24.4 88 ST. LAWRENCE ALT 8620 1.7 4.0 42 11.5 13.6 85 TOGWOTEE PASS 9580 31.3 27.5 114 35.2 30.7 115 TOWNSEND CREEK 8700 6.1 5.9 103 16.0 17.1 94 ----- ----- Basin wide percent of average 102 96 BIGHORN BASIN BALD MTN. 9380 20.6 23.2 89 20.2 23.2 87 BEAR TRAP MEADOW 8200 4.7 .9 522 13.0 12.4 105 BLACKWATER 9780 31.2 28.9 108 29.6 26.5 112 BONE SPRINGS DIV 9350 21.4 16.5 130 23.0 20.1 114 EVENING STAR 9200 33.0 32.6 101 40.2 31.8 126 GRAVE SPRINGS 8550 11.8 8.4 140 14.4 14.6 99 KIRWIN 9550 12.6 11.3 112 17.7 15.7 113 MARQUETTE 8760 10.0 9.1 110 14.8 15.6 95 MIDDLE POWDER 7760 15.8 11.5 137 14.4 17.4 83 OWL CREEK 8975 .1 2.5 4 9.2 9.4 98 POWDER RIVER PASS 9480 12.8 8.4 152 19.0 17.5 109 SHELL CREEK 9580 19.8 16.5 120 20.5 18.5 111 SYLVAN LAKE 8420 21.8 20.8 105 32.1 26.5 121 SYLVAN ROAD 7120 3.8 3.1 123 24.4 21.8 112 TIMBER CREEK 7950 3.6 2.3 157 12.2 12.2 100 YOUNTS PEAK 8350 17.0 15.8 108 20.3 20.2 100 ----- ----- Basin wide percent of average 113 107 SHOSHONE RIVER BLACKWATER 9780 31.2 28.9 108 29.6 26.5 112 EVENING STAR 9200 33.0 32.6 101 40.2 31.8 126 KIRWIN 9550 12.6 11.3 112 17.7 15.7 113 MARQUETTE 8760 10.0 9.1 110 14.8 15.6 95 SYLVAN LAKE 8420 21.8 20.8 105 32.1 26.5 121 SYLVAN ROAD 7120 3.8 3.1 123 24.4 21.8 112 YOUNTS PEAK 8350 17.0 15.8 108 20.3 20.2 100 ----- ----- Basin wide percent of average 106 113 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.7 .9 522 13.0 12.4 105 BIG GOOSE 7990 11.6 9.3 125 17.9 14.7 122 BONE SPRINGS DIV 9350 21.4 16.5 130 23.0 20.1 114 BURGESS JUNCTION 7880 17.0 10.5 162 20.0 16.9 118 CLOUD PEAK RESERVOIR 9860 19.8 15.0 132 21.6 19.2 113 DOME LAKE 8880 12.8 10.7 120 21.0 18.6 113 GRAVE SPRINGS 8550 11.8 8.4 140 14.4 14.6 99 HANSEN SAWMILL 8360 3.1 2.4 129 13.1 12.3 107 MIDDLE POWDER 7760 15.8 11.5 137 14.4 17.4 83 POWDER RIVER PASS 9480 12.8 8.4 152 19.0 17.5 109 SUCKER CREEK 8880 18.3 10.5 174 23.7 19.4 122 TIE CREEK 6870 5.7 1.5 380 17.2 15.3 112 ----- ----- Basin wide percent of average 147 110 BELLE FOURCHE BLIND PARK 6890 2.0 .2 1000 16.3 15.8 103 COLE CANYON 5910 3.6 .9 400 14.2 11.1 128 NORTH RAPID CREEK 6130 5.8 .7 829 16.2 12.6 129 ----- ----- Basin wide percent of average 633 118 UPPER N. PLATTE RIVER COLUMBINE 9160 21.5 13.8 156 34.6 30.6 113 DIVIDE PEAK 8880 20.8 13.3 156 28.8 25.8 112 ELK RIVER 8700 17.9 8.1 221 28.7 24.4 118 JOE WRIGHT 10120 29.5 24.0 123 36.5 32.3 113 NORTH FRENCH CREEK 10130 34.7 33.4 104 37.1 31.9 116 OLD BATTLE 10000 39.8 35.8 111 47.6 42.0 113 SAGE CREEK BASIN 7850 8.6 7.7 112 20.4 15.0 136 SOUTH BRUSH CREEK 8440 6.0 6.9 87 21.4 21.8 98 TOWER 10500 51.2 51.7 99 -M 47.6 * WEBBER SPRINGS 9250 25.0 18.8 133 37.6 32.9 114 WILLOW CREEK PASS 9540 21.8 11.6 188 21.4 17.0 126 ----- ----- Basin wide percent of average 123 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 20.9 23.7 88 28.0 29.0 97 CASPER MTN. 7900 17.0 12.2 139 21.3 21.6 99 DEADMAN HILL 10220 21.4 18.3 117 25.4 22.7 112 DEER PARK 9700 16.1 17.3 93 24.6 28.7 86 LAPRELE CREEK 8375 4.3 3.8 113 16.2 18.1 90 RENO HILL 8400 18.0 10.1 178 25.6 22.4 114 ROACH 9700 20.5 13.9 147 28.4 24.3 117 SAND LAKE 10050 35.1 35.8 98 37.4 31.7 118 SOUTH PASS 9040 13.6 14.4 94 21.5 24.4 88 WINDY PEAK 7900 3.4 1.9 179 14.1 15.1 93 ----- ----- Basin wide percent of average 112 102 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .9 0 20.7 19.7 105 DIVIDE PEAK 8880 20.8 13.3 156 28.8 25.8 112 OLD BATTLE 10000 39.8 35.8 111 47.6 42.0 113 SANDSTONE RS 8150 10.6 4.1 259 25.9 23.3 111 WHISKEY PARK 8950 36.8 27.0 136 43.4 35.9 121 ----- ----- Basin wide percent of average 133 113 UPPER GREEN RIVER BIG SANDY OPENING 9080 9.4 9.4 100 15.9 17.1 93 BLIND BULL SUM 8650 27.9 25.2 111 20.6 26.5 78 EAST RIM DIVIDE 7930 4.5 9.6 47 12.9 14.8 87 ELKHART PARK G.S. 9400 9.5 9.7 98 13.9 17.3 80 GROS VENTRE SUMMIT 8750 11.6 10.2 114 16.9 16.3 104 GUNSIGHT PASS 9820 12.9 -M * 18.0 -M * KENDALL R.S. 7740 3.8 4.2 90 15.7 17.4 90 LOOMIS PARK 8240 9.1 10.1 90 20.5 21.1 97 NEW FORK LAKE 8340 3.6 4.2 86 11.4 14.5 79 SNIDER BASIN 8060 7.0 8.1 86 16.1 19.4 83 SPRING CREEK DIVIDE 9000 22.8 25.1 91 27.4 31.5 87 TRIPLE PEAK 8500 21.4 17.7 121 33.6 30.2 111 ----- ----- Basin wide percent of average 98 91 LOWER GREEN RIVER HAMS FORK 7840 3.3 1.5 220 12.8 15.8 81 HEWINTA 9519 7.2 4.8 150 20.2 19.0 106 HICKERSON PARK 9145 .0 2.3 0 11.3 11.3 100 HOLE-IN-ROCK 9150 .0 1.9 0 11.9 10.8 110 INDIAN CREEK 9425 -M 24.2 * -M 30.9 * KELLEY R.S. 8180 11.6 9.5 122 21.3 24.8 86 STEEL CREEK PARK 10200 20.3 18.3 111 22.4 21.5 104 ----- ----- Basin wide percent of average 111 97 UPPER BEAR RIVER BUG LAKE 7950 14.6 11.4 128 20.0 23.7 84 HAYDEN FORK 9212 9.0 7.8 115 27.6 26.7 103 KELLEY R.S. 8180 11.6 9.5 122 21.3 24.8 86 LILY LAKE 9156 9.4 6.7 140 21.6 22.5 96 MONTE CRISTO 8960 25.8 23.2 111 30.5 32.1 95 SALT RIVER SUMMIT 7760 9.5 5.3 179 18.9 22.7 83 TRIAL LAKE 9992 21.5 23.6 91 28.8 31.2 92 ----- ----- Basin wide percent of average 116 92 ----------------------------------------------------------------------------- -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.