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 THURSDAY: APRIL 28 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 26.5 13.3 199 30.7 24.1 127 COTTONWOOD CREEK 7670 36.3 20.7 175 44.3 31.5 141 GRAND TARGHEE 9260 61.1 -M * 45.1 -M * GRANITE CREEK 6770 26.1 13.8 189 29.6 22.1 134 GRASSY LAKE 7265 48.9 34.4 142 50.9 40.5 126 GROS VENTRE SUMMIT 8750 18.6 13.7 136 18.8 15.0 125 GUNSIGHT PASS 9820 23.5 -M * 21.6 -M * LEWIS LAKE DIVIDE 7850 54.7 35.3 155 44.4 41.2 108 PHILLIPS BENCH 8200 39.9 30.0 133 41.2 32.7 126 SALT RIVER SUMMIT 7760 21.0 11.6 181 26.5 21.4 124 SNAKE RIVER STATION 6920 -M 13.4 * 32.8 25.2 130 SPRING CREEK DIVIDE 9000 44.0 28.8 153 39.8 29.9 133 THUMB DIVIDE 7980 28.9 15.9 182 26.3 21.7 121 TOGWOTEE PASS 9580 37.4 27.8 135 38.8 28.6 136 TWO OCEAN PLATEAU 9240 -M 31.7 * -M 31.7 * WILLOW CREEK 8380 47.5 31.2 152 51.4 37.1 139 ----- ----- Basin wide percent of average 155 128 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 32.5 25.9 125 31.0 23.2 134 BLACK BEAR 8170 56.9 40.5 140 54.5 45.4 120 CANYON 7870 21.4 11.9 180 23.2 17.5 133 FISHER CREEK 9100 50.6 37.8 134 47.9 41.4 116 MADISON PLATEAU 7750 37.5 24.9 151 39.2 30.1 130 NORTHEAST ENTRANCE 7350 17.1 7.8 219 19.3 14.6 132 PARKER PEAK 9400 37.4 24.4 153 31.8 19.2 166 SYLVAN LAKE 8420 32.6 24.0 136 36.1 24.3 149 THUMB DIVIDE 7980 28.9 15.9 182 26.3 21.7 121 TWO OCEAN PLATEAU 9240 -M 31.7 * -M 31.7 * WHISKEY CREEK 6800 24.2 15.9 152 29.0 23.9 121 WHITE MILL 8700 35.5 26.4 134 35.2 30.8 114 WOLVERINE 7650 17.2 7.8 221 18.0 14.9 121 ----- ----- Basin wide percent of average 149 128 WIND RIVER BURROUGHS CREEK 8750 20.6 14.1 146 21.5 19.0 113 CASTLE CREEK 8400 7.5 -M * 10.4 -M * COLD SPRINGS 9630 9.9 4.8 206 11.6 13.6 85 DEER PARK 9700 22.0 19.1 115 25.6 26.5 97 HOBBS PARK 10100 18.8 18.0 104 16.8 16.5 102 LITTLE WARM 9370 15.5 11.5 135 16.3 16.4 99 SOUTH PASS 9040 19.3 18.2 106 16.8 22.3 75 ST. LAWRENCE ALT 8620 4.1 6.4 64 9.7 11.7 83 TOGWOTEE PASS 9580 37.4 27.8 135 38.8 28.6 136 TOWNSEND CREEK 8700 9.3 9.6 97 13.3 15.1 88 ----- ----- Basin wide percent of average 121 100 BIGHORN BASIN BALD MTN. 9380 30.3 23.4 129 24.7 20.9 118 BEAR TRAP MEADOW 8200 11.1 2.8 396 11.8 10.6 111 BLACKWATER 9780 36.3 28.4 128 34.2 24.3 141 BONE SPRINGS DIV 9350 26.9 18.2 148 21.8 17.9 122 EVENING STAR 9200 41.2 33.0 125 43.0 29.5 146 GRAVE SPRINGS 8550 11.5 11.0 105 12.0 12.8 94 KIRWIN 9550 16.8 13.0 129 17.3 13.9 124 MARQUETTE 8760 6.6 -M * 9.8 13.3 74 MIDDLE POWDER 7760 13.8 14.6 95 13.9 15.4 90 OWL CREEK 8975 7.8 4.0 195 8.9 7.9 113 POWDER RIVER PASS 9480 20.0 11.1 180 22.9 15.4 149 SHELL CREEK 9580 23.1 16.8 138 20.9 16.4 127 SYLVAN LAKE 8420 32.6 24.0 136 36.1 24.3 149 SYLVAN ROAD 7120 18.2 8.9 204 26.7 20.2 132 TIMBER CREEK 7950 6.6 4.9 135 8.0 10.1 79 YOUNTS PEAK 8350 23.6 18.2 130 20.8 18.5 112 ----- ----- Basin wide percent of average 138 123 SHOSHONE RIVER BLACKWATER 9780 36.3 28.4 128 34.2 24.3 141 EVENING STAR 9200 41.2 33.0 125 43.0 29.5 146 KIRWIN 9550 16.8 13.0 129 17.3 13.9 124 MARQUETTE 8760 6.6 -M * 9.8 13.3 74 SYLVAN LAKE 8420 32.6 24.0 136 36.1 24.3 149 SYLVAN ROAD 7120 18.2 8.9 204 26.7 20.2 132 YOUNTS PEAK 8350 23.6 18.2 130 20.8 18.5 112 ----- ----- Basin wide percent of average 134 130 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.1 2.8 396 11.8 10.6 111 BIG GOOSE 7990 12.4 12.0 103 14.3 12.5 114 BONE SPRINGS DIV 9350 26.9 18.2 148 21.8 17.9 122 BURGESS JUNCTION 7880 14.8 13.4 110 15.6 15.1 103 CLOUD PEAK RESERVOIR 9860 21.0 16.3 129 19.7 16.6 119 DOME LAKE 8880 18.4 13.8 133 18.0 16.4 110 GRAVE SPRINGS 8550 11.5 11.0 105 12.0 12.8 94 HANSEN SAWMILL 8360 10.3 5.1 202 11.6 10.7 108 LITTLE GOOSE 8870 14.6 -M * 18.8 -M * MIDDLE POWDER 7760 13.8 14.6 95 13.9 15.4 90 POWDER RIVER PASS 9480 20.0 11.1 180 22.9 15.4 149 SOLDIER PARK 8720 11.2 -M * 12.3 -M * SUCKER CREEK 8880 17.7 13.4 132 19.5 17.0 115 TIE CREEK 6870 8.5 4.5 189 13.8 13.1 105 ----- ----- Basin wide percent of average 137 112 BELLE FOURCHE BLIND PARK 6890 11.2 4.8 233 21.0 13.8 152 COLE CANYON 5910 8.8 5.6 157 15.7 9.1 173 NORTH RAPID CREEK 6130 6.4 5.1 125 16.7 11.0 152 ----- ----- Basin wide percent of average 170 158 UPPER N. PLATTE RIVER CINNABAR PARK 9574 31.2 16.5 189 36.9 23.1 160 COLUMBINE 9160 39.6 22.0 180 43.4 28.8 151 DIVIDE PEAK 8880 31.2 20.0 156 36.1 23.9 151 ELK RIVER 8700 30.1 16.2 186 33.6 22.7 148 JOE WRIGHT 10120 -M 25.0 * 46.7 29.5 158 NORTH FRENCH CREEK 10130 -M 34.3 * 61.5 29.1 211 OLD BATTLE 10000 55.7 36.5 153 47.2 39.4 120 SAGE CREEK BASIN 7850 19.7 11.6 170 23.7 13.9 171 SOUTH BRUSH CREEK 8440 24.7 11.7 211 29.8 19.7 151 TOWER 10500 70.8 51.9 136 47.7 44.5 107 WEBBER SPRINGS 9250 39.2 25.6 153 45.3 30.7 148 WILLOW CREEK PASS 9540 26.1 14.3 183 24.0 15.4 156 ----- ----- Basin wide percent of average 163 148 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 41.5 28.3 147 38.0 26.5 143 CASPER MTN. 7900 13.1 17.5 75 17.9 19.0 94 DEADMAN HILL 10220 30.3 19.5 155 29.8 20.5 145 DEER PARK 9700 22.0 19.1 115 25.6 26.5 97 LAPRELE CREEK 8375 15.1 7.8 194 17.6 16.0 110 RENO HILL 8400 18.3 15.3 120 21.7 19.7 110 ROACH 9700 27.8 18.7 149 30.8 22.0 140 SAND LAKE 10050 48.5 36.8 132 -M 28.8 * SOUTH PASS 9040 19.3 18.2 106 16.8 22.3 75 WINDY PEAK 7900 10.4 5.7 182 16.4 13.2 124 ----- ----- Basin wide percent of average 132 116 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 5.4 * 21.2 18.3 116 DIVIDE PEAK 8880 31.2 20.0 156 36.1 23.9 151 OLD BATTLE 10000 55.7 36.5 153 47.2 39.4 120 SANDSTONE RS 8150 22.8 10.5 217 33.0 21.6 153 WHISKEY PARK 8950 -M 30.7 * 47.5 33.3 143 ----- ----- Basin wide percent of average 164 136 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.4 14.1 138 19.3 15.6 124 BLIND BULL SUM 8650 43.1 28.2 153 28.7 24.9 115 EAST RIM DIVIDE 7930 17.2 13.6 126 16.6 13.7 121 ELKHART PARK G.S. 9400 17.6 13.3 132 17.2 15.7 110 GROS VENTRE SUMMIT 8750 18.6 13.7 136 18.8 15.0 125 GUNSIGHT PASS 9820 23.5 -M * 21.6 -M * KENDALL R.S. 7740 15.1 10.9 139 19.6 16.4 120 LOOMIS PARK 8240 25.3 15.0 169 26.4 19.7 134 NEW FORK LAKE 8340 15.2 9.2 165 14.0 13.2 106 POCKET CREEK 9360 17.0 -M * 18.5 -M * SNIDER BASIN 8060 24.2 13.3 182 22.9 18.3 125 SPRING CREEK DIVIDE 9000 44.0 28.8 153 39.8 29.9 133 TRIPLE PEAK 8500 41.8 24.5 171 42.1 28.3 149 ----- ----- Basin wide percent of average 152 126 LOWER GREEN RIVER HAMS FORK 7840 18.2 6.9 264 18.8 14.5 130 HEWINTA 9519 17.2 10.1 170 22.1 17.5 126 HICKERSON PARK 9145 5.1 6.4 80 12.5 10.0 125 HOLE-IN-ROCK 9150 9.1 5.4 169 14.2 9.5 149 INDIAN CREEK 9425 39.9 28.9 138 33.0 29.1 113 KELLEY R.S. 8180 26.1 14.9 175 29.2 23.3 125 STEEL CREEK PARK 10200 23.6 18.4 128 25.7 19.9 129 ----- ----- Basin wide percent of average 153 126 UPPER BEAR RIVER BUG LAKE 7950 -M 19.1 * -M 22.1 * HAYDEN FORK 9212 -M 13.9 * 36.9 24.8 149 KELLEY R.S. 8180 26.1 14.9 175 29.2 23.3 125 LILY LAKE 9156 26.4 12.0 220 28.0 20.8 135 MONTE CRISTO 8960 48.1 29.0 166 45.9 29.8 154 SALT RIVER SUMMIT 7760 21.0 11.6 181 26.5 21.4 124 TRIAL LAKE 9992 46.0 26.6 173 41.7 29.0 144 ----- ----- Basin wide percent of average 178 140 ----------------------------------------------------------------------------- -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.