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 TUESDAY: MAY 4 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.4 9.5 162 29.7 25.5 117 COTTONWOOD CREEK 7600 22.5 18.9 120 33.3 28.5 117 GRANITE CREEK 6770 16.4 11.9 139 26.9 27.2 99 GRASSY LAKE 7265 39.2 32.5 121 47.2 42.4 112 GROS VENTRE SUMMIT 8775 16.4 13.1 126 18.7 18.4 102 LEWIS LAKE DIVIDE 7860 39.3 33.4 118 44.0 43.2 103 PHILLIPS BENCH 8200 35.3 28.7 123 36.2 34.0 107 SALT RIVER SUMMIT 7600 13.6 8.5 161 21.4 19.5 110 SNAKE RIVER STATION 6920 13.5 15.5 88 28.9 29.7 97 SPRING CREEK DIVIDE 9000 36.8 28.9 128 34.3 31.2 110 THUMB DIVIDE 7980 19.2 14.4 134 25.5 23.9 107 TOGWOTEE PASS 9580 -M 27.9 * 33.0 32.3 103 TWO OCEAN PLATEAU 9360 40.3 27.4 147 35.3 35.2 101 WILLOW CREEK 8450 31.2 31.2 101 45.3 36.7 124 ----- ----- Basin wide percent of average 124 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 28.2 25.9 109 27.4 21.7 127 BLACK BEAR 7950 -M 39.3 * 51.3 46.9 110 CANYON 7940 14.6 10.0 146 21.2 16.7 128 FISHER CREEK 9100 -M 38.5 * 41.8 42.8 98 MADISON PLATEAU 7750 -M 22.9 * 36.3 30.4 120 NORTHEAST ENTRANCE 7350 4.8 5.3 91 16.4 14.2 115 PARKER PEAK 9400 26.7 23.5 114 -M 18.7 * SYLVAN LAKE 8420 24.5 23.2 106 31.7 22.7 140 THUMB DIVIDE 7980 19.2 14.4 134 25.5 23.9 107 TWO OCEAN PLATEAU 9360 40.3 27.4 147 35.3 35.2 101 WHISKEY CREEK 6800 19.7 14.0 141 27.9 25.2 111 WHITE MILL 8700 30.4 26.2 117 28.5 33.0 87 WOLVERINE 7650 6.5 7.1 91 15.0 15.5 97 ----- ----- Basin wide percent of average 122 110 WIND RIVER BURROUGHS CREEK 8750 18.7 11.7 159 21.5 19.7 110 COLD SPRINGS 9630 19.4 6.0 324 -M 13.5 * DEER PARK 9700 25.9 -M * 31.9 -M * HOBBS PARK 10100 29.2 17.9 165 -M 17.7 * LITTLE WARM 9620 -M 9.5 * 23.0 16.7 139 SOUTH PASS 9040 24.9 17.9 140 29.4 21.0 141 ST. LAWRENCE ALT 8620 14.1 4.8 294 20.7 12.9 161 TOGWOTEE PASS 9580 -M 27.9 * 33.0 32.3 103 TOWNSEND CREEK 8700 19.5 8.9 222 25.2 16.0 158 ----- ----- Basin wide percent of average 188 129 BIGHORN BASIN BALD MTN. 9375 21.9 24.2 91 21.9 21.4 103 BEAR TRAP MEADOW 7900 1.2 3.8 30 14.5 11.0 132 BLACKWATER 9780 35.0 25.7 137 28.9 21.0 138 BONE SPRINGS DIV 9350 19.9 18.2 110 21.4 18.5 116 EVENING STAR 9200 36.8 30.7 120 39.5 26.4 151 GRAVE SPRINGS 8550 10.7 11.5 94 16.9 12.9 132 KIRWIN 9550 16.5 11.5 145 19.4 13.6 142 MARQUETTE 8760 17.0 8.5 203 18.9 14.0 136 MIDDLE POWDER 7760 15.7 14.7 107 22.2 15.2 146 OWL CREEK 8975 10.1 2.9 349 12.2 8.5 146 POWDER RIVER PASS 9480 11.9 9.6 123 19.5 15.1 130 SHELL CREEK 9580 17.7 17.0 104 18.4 16.4 113 SYLVAN LAKE 8420 24.5 23.2 106 31.7 22.7 140 SYLVAN ROAD 8120 10.1 7.1 143 21.7 19.0 114 TIMBER CREEK 7950 10.1 5.3 191 15.5 10.5 150 YOUNTS PEAK 8350 21.4 17.9 121 21.4 19.7 109 ----- ----- Basin wide percent of average 122 130 SHOSHONE RIVER BLACKWATER 9780 35.0 25.7 137 28.9 21.0 138 EVENING STAR 9200 36.8 30.7 120 39.5 26.4 151 KIRWIN 9550 16.5 11.5 145 19.4 13.6 142 MARQUETTE 8760 17.0 8.5 203 18.9 14.0 136 SYLVAN LAKE 8420 24.5 23.2 106 31.7 22.7 140 SYLVAN ROAD 8120 10.1 7.1 143 21.7 19.0 114 YOUNTS PEAK 8350 21.4 17.9 121 21.4 19.7 109 ----- ----- Basin wide percent of average 130 133 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.2 3.8 30 14.5 11.0 132 BIG GOOSE 7990 9.7 -M * 16.9 -M * BONE SPRINGS DIV 9350 19.9 18.2 110 21.4 18.5 116 BURGESS JUNCTION 7880 10.2 13.0 79 15.6 14.9 106 CLOUD PEAK RESERVOIR 9860 23.9 17.4 137 23.4 17.7 133 DOME LAKE 8880 -M 14.0 * 16.5 16.9 99 GRAVE SPRINGS 8550 10.7 11.5 94 16.9 12.9 132 HANSEN SAWMILL 8760 5.5 6.3 88 15.4 10.6 145 MIDDLE POWDER 7760 15.7 14.7 107 22.2 15.2 146 POWDER RIVER PASS 9480 11.9 9.6 123 19.5 15.1 130 SUCKER CREEK 8880 13.6 13.1 104 19.2 16.9 114 TIE CREEK 6870 -M -M * -M 14.2 * ----- ----- Basin wide percent of average 105 124 BELLE FOURCHE BLIND PARK 6890 .0 8.6 0 18.0 14.4 126 NORTH RAPID CREEK 6130 .5 -M * 16.5 -M * WARREN PEAK 6520 3.8 8.6 45 13.2 10.6 125 ----- ----- Basin wide percent of average 23 126 UPPER N. PLATTE RIVER COLUMBINE 9400 16.7 20.4 82 27.9 28.4 99 DIVIDE PEAK 8800 21.5 17.9 121 30.7 27.7 111 ELK RIVER 8700 14.1 14.6 97 27.4 22.4 122 JOE WRIGHT 10120 23.2 24.5 95 31.4 30.9 102 NORTH FRENCH CREEK 10100 39.3 28.9 136 38.0 28.5 134 OLD BATTLE 10000 38.8 38.0 103 44.4 36.2 123 SOUTH BRUSH CREEK 8400 9.6 9.6 100 23.2 20.9 111 TOWER 10500 56.3 51.2 111 47.2 43.9 108 WEBBER SPRINGS 9200 21.9 24.9 88 32.5 31.0 105 WILLOW CREEK PASS 9540 15.6 13.0 121 15.0 15.7 95 ----- ----- Basin wide percent of average 106 112 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 28.2 28.2 101 30.7 24.2 127 CASPER MTN. 7900 12.5 16.4 77 21.4 19.2 112 DEADMAN HILL 10220 21.7 19.0 115 23.2 21.5 108 DEER PARK 9700 25.9 -M * 31.9 -M * LAPRELE CREEK 8320 .0 5.8 0 19.9 15.1 132 RENO HILL 8400 14.9 12.5 120 24.7 22.7 109 ROACH 9700 -M 17.7 * 25.4 26.4 97 SAND LAKE 10080 46.3 36.9 126 36.8 25.2 147 SOUTH PASS 9040 24.9 17.9 140 29.4 21.0 141 WINDY PEAK 7840 5.5 7.0 78 17.9 12.6 142 ----- ----- Basin wide percent of average 108 123 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 1.7 3.8 43 22.0 18.9 118 DIVIDE PEAK 8800 21.5 17.9 121 30.7 27.7 111 OLD BATTLE 10000 38.8 38.0 103 44.4 36.2 123 SANDSTONE RS 8150 6.1 8.2 75 24.9 23.4 107 WHISKEY PARK 8950 31.5 28.7 110 36.4 34.5 106 ----- ----- Basin wide percent of average 104 113 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.0 13.1 123 18.5 18.9 99 BLIND BULL SUM 8650 32.3 22.7 143 26.9 27.2 99 EAST RIM DIVIDE 7930 14.7 14.5 103 17.4 17.5 100 ELKHART PARK G.S. 9400 16.0 13.2 122 18.2 18.4 99 GROS VENTRE SUMMIT 8775 16.4 13.1 126 18.7 18.4 102 KENDALL R.S. 7740 11.5 8.5 137 19.2 17.9 108 LOOMIS PARK 8240 -M 14.4 * 23.9 21.7 111 NEW FORK LAKE 8340 12.0 8.5 142 15.1 16.7 91 SNIDER BASIN 8250 19.7 12.1 163 22.0 17.4 127 SPRING CREEK DIVIDE 9000 36.8 28.9 128 34.3 31.2 110 TRIPLE PEAK 8500 31.9 24.2 132 36.9 35.4 105 ----- ----- Basin wide percent of average 131 105 LOWER GREEN RIVER HAMS FORK 7840 10.0 4.5 221 17.4 15.5 113 HEWINTA 9500 13.0 4.3 310 18.4 16.7 111 HICKERSON PARK 9150 6.5 2.5 261 14.2 12.6 113 HOLE-IN-ROCK 9150 9.1 2.0 455 14.5 12.6 116 INDIAN CREEK 9425 37.5 28.2 134 32.7 29.5 111 KELLEY R.S. 8180 16.7 14.0 120 23.4 21.7 108 STEEL CREEK PARK 10100 20.9 18.5 113 22.2 16.5 135 ----- ----- Basin wide percent of average 154 115 UPPER BEAR RIVER BUG LAKE 7950 25.5 14.9 173 27.9 22.9 122 HAYDEN FORK 9400 14.1 5.5 262 25.9 23.4 111 KELLEY R.S. 8180 16.7 14.0 120 23.4 21.7 108 LILY LAKE 9050 13.9 8.1 171 23.4 18.4 127 MONTE CRISTO 8960 37.9 25.4 150 35.7 30.7 116 SALT RIVER SUMMIT 7600 13.6 8.5 161 21.4 19.5 110 TRIAL LAKE 9960 27.0 23.4 116 29.5 28.7 103 ----- ----- Basin wide percent of average 150 114 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. 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.