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 12 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 14.2 6.1 233 30.2 26.2 115 COTTONWOOD CREEK 7600 23.2 15.4 152 35.3 29.4 121 GRANITE CREEK 6770 14.4 8.6 167 27.2 27.9 98 GRASSY LAKE 7265 39.3 28.7 137 48.2 43.5 111 GROS VENTRE SUMMIT 8775 16.4 11.0 149 19.4 18.9 103 LEWIS LAKE DIVIDE 7860 38.0 30.7 124 44.8 44.3 102 PHILLIPS BENCH 8200 33.9 26.4 129 36.8 34.9 106 SALT RIVER SUMMIT 7600 12.0 2.4 501 22.2 20.0 111 SNAKE RIVER STATION 6920 11.6 12.6 93 29.4 30.5 97 SPRING CREEK DIVIDE 9000 37.4 26.9 140 35.3 31.9 111 THUMB DIVIDE 7980 17.0 12.1 141 25.9 24.5 106 TOGWOTEE PASS 9580 -M 26.5 * 34.3 33.3 104 TWO OCEAN PLATEAU 9360 41.3 26.7 156 35.9 36.2 100 WILLOW CREEK 8450 31.4 28.7 110 47.0 37.7 125 ----- ----- Basin wide percent of average 140 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 29.2 25.2 116 27.5 22.7 122 BLACK BEAR 7950 55.4 37.8 147 53.0 48.0 111 CANYON 7940 12.5 7.5 167 21.4 17.4 124 FISHER CREEK 9100 41.3 37.8 110 42.3 44.0 97 MADISON PLATEAU 7750 -M 20.0 * 36.9 31.2 119 NORTHEAST ENTRANCE 7350 2.4 3.4 71 16.7 15.0 113 PARKER PEAK 9400 26.4 23.0 115 -M 19.4 * SYLVAN LAKE 8420 24.7 21.4 116 32.3 23.9 136 THUMB DIVIDE 7980 17.0 12.1 141 25.9 24.5 106 TWO OCEAN PLATEAU 9360 41.3 26.7 156 35.9 36.2 100 WHISKEY CREEK 6800 18.4 10.9 171 28.5 25.9 111 WHITE MILL 8700 30.7 25.2 122 28.9 34.2 85 WOLVERINE 7650 2.3 4.1 54 15.5 16.4 95 ----- ----- Basin wide percent of average 129 108 WIND RIVER BURROUGHS CREEK 8750 18.4 8.2 225 22.2 20.5 109 COLD SPRINGS 9630 18.7 3.8 506 23.9 14.2 169 DEER PARK 9700 25.9 -M * 32.7 -M * HOBBS PARK 10100 30.2 17.2 176 27.9 18.7 150 LITTLE WARM 9620 20.4 6.5 313 24.2 17.4 140 SOUTH PASS 9040 24.4 16.9 144 30.2 21.9 138 ST. LAWRENCE ALT 8620 13.0 3.2 420 21.2 13.5 158 TOGWOTEE PASS 9580 -M 26.5 * 34.3 33.3 104 TOWNSEND CREEK 8700 18.9 7.0 273 25.9 16.7 155 ----- ----- Basin wide percent of average 230 135 BIGHORN BASIN BALD MTN. 9375 25.0 24.4 103 24.5 22.4 110 BEAR TRAP MEADOW 7900 1.4 2.2 67 -M 11.9 * BLACKWATER 9780 35.5 25.0 143 29.4 21.9 134 BONE SPRINGS DIV 9350 22.0 17.0 130 23.9 19.7 122 EVENING STAR 9200 36.9 30.5 121 40.0 27.4 146 GRAVE SPRINGS 8550 11.2 11.2 100 18.2 13.9 132 KIRWIN 9550 17.4 10.5 166 20.5 14.5 143 MARQUETTE 8760 17.4 8.0 219 19.7 15.0 133 MIDDLE POWDER 7760 17.7 14.2 124 23.2 16.2 144 OWL CREEK 8975 11.1 1.7 694 14.5 9.1 159 POWDER RIVER PASS 9480 12.2 7.3 170 21.5 16.0 135 SHELL CREEK 9580 19.4 17.0 115 20.4 17.4 118 SYLVAN LAKE 8420 24.7 21.4 116 32.3 23.9 136 SYLVAN ROAD 8120 7.6 5.0 156 21.9 19.9 111 TIMBER CREEK 7950 10.9 3.3 328 16.9 11.5 148 YOUNTS PEAK 8350 21.4 16.4 130 21.7 20.4 107 ----- ----- Basin wide percent of average 136 130 SHOSHONE RIVER BLACKWATER 9780 35.5 25.0 143 29.4 21.9 134 EVENING STAR 9200 36.9 30.5 121 40.0 27.4 146 KIRWIN 9550 17.4 10.5 166 20.5 14.5 143 MARQUETTE 8760 17.4 8.0 219 19.7 15.0 133 SYLVAN LAKE 8420 24.7 21.4 116 32.3 23.9 136 SYLVAN ROAD 8120 7.6 5.0 156 21.9 19.9 111 YOUNTS PEAK 8350 21.4 16.4 130 21.7 20.4 107 ----- ----- Basin wide percent of average 138 130 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.4 2.2 67 -M 11.9 * BIG GOOSE 7990 9.9 -M * 18.4 -M * BONE SPRINGS DIV 9350 22.0 17.0 130 23.9 19.7 122 BURGESS JUNCTION 7880 12.0 11.7 102 17.7 15.6 113 CLOUD PEAK RESERVOIR 9860 24.7 16.5 150 24.9 18.7 134 DOME LAKE 8880 -M 11.5 * 17.7 17.9 100 GRAVE SPRINGS 8550 11.2 11.2 100 18.2 13.9 132 HANSEN SAWMILL 8760 4.8 4.8 100 17.2 11.4 153 MIDDLE POWDER 7760 17.7 14.2 124 23.2 16.2 144 POWDER RIVER PASS 9480 12.2 7.3 170 21.5 16.0 135 SUCKER CREEK 8880 14.9 11.4 131 21.4 18.0 119 TIE CREEK 6870 -M -M * -M 15.0 * ----- ----- Basin wide percent of average 126 127 BELLE FOURCHE BLIND PARK 6890 .3 5.8 6 19.2 15.5 125 NORTH RAPID CREEK 6130 .0 -M * 17.2 -M * WARREN PEAK 6520 1.9 5.8 34 -M 11.5 * ----- ----- Basin wide percent of average 20 125* UPPER N. PLATTE RIVER COLUMBINE 9400 15.5 16.0 98 29.2 29.2 100 DIVIDE PEAK 8800 19.9 14.0 142 31.7 28.7 111 ELK RIVER 8700 12.0 10.2 117 28.4 23.0 124 JOE WRIGHT 10120 23.5 24.0 98 33.3 32.0 104 NORTH FRENCH CREEK 10100 40.7 27.4 149 40.2 29.7 136 OLD BATTLE 10000 39.9 37.3 108 46.9 37.2 127 SOUTH BRUSH CREEK 8400 9.9 7.0 141 25.7 21.7 119 TOWER 10500 57.4 50.9 113 49.5 45.5 109 WEBBER SPRINGS 9200 21.2 21.7 98 33.9 31.9 107 WILLOW CREEK PASS 9540 15.6 11.5 137 16.0 16.5 97 ----- ----- Basin wide percent of average 117 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 28.7 25.9 111 32.0 25.0 129 CASPER MTN. 7900 12.9 12.7 101 23.4 20.4 115 DEADMAN HILL 10220 21.7 18.9 115 24.0 22.4 108 DEER PARK 9700 25.9 -M * 32.7 -M * LAPRELE CREEK 8320 .2 4.1 3 20.7 16.0 130 RENO HILL 8400 14.7 9.7 152 26.7 23.2 116 ROACH 9700 -M 16.5 * 26.2 27.4 96 SAND LAKE 10080 46.3 35.8 130 37.8 26.2 145 SOUTH PASS 9040 24.4 16.9 144 30.2 21.9 138 WINDY PEAK 7840 1.4 4.5 29 18.2 13.5 135 ----- ----- Basin wide percent of average 117 122 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 1.2 0* 23.2 19.4 120 DIVIDE PEAK 8800 19.9 14.0 142 31.7 28.7 111 OLD BATTLE 10000 39.9 37.3 108 46.9 37.2 127 SANDSTONE RS 8150 3.8 4.0 95 26.2 24.2 109 WHISKEY PARK 8950 30.7 26.4 117 37.9 35.7 107 ----- ----- Basin wide percent of average 115 115 UPPER GREEN RIVER BIG SANDY OPENING 9100 14.5 10.7 136 18.9 19.4 98 BLIND BULL SUM 8650 32.3 22.5 144 27.4 27.9 99 EAST RIM DIVIDE 7930 14.6 13.2 111 17.9 18.0 99 ELKHART PARK G.S. 9400 15.7 10.9 146 19.2 19.0 102 GROS VENTRE SUMMIT 8775 16.4 11.0 149 19.4 18.9 103 KENDALL R.S. 7740 10.0 2.3 431 19.9 18.4 108 LOOMIS PARK 8240 -M 12.2 * 24.5 22.4 110 NEW FORK LAKE 8340 11.0 7.0 160 16.2 17.2 95 SNIDER BASIN 8250 18.2 9.5 191 22.7 18.0 126 SPRING CREEK DIVIDE 9000 37.4 26.9 140 35.3 31.9 111 TRIPLE PEAK 8500 31.0 22.2 141 37.9 36.4 105 ----- ----- Basin wide percent of average 148 105 LOWER GREEN RIVER HAMS FORK 7840 7.3 1.4 562* 18.2 16.0 114 HEWINTA 9500 12.5 1.2 1042* 19.2 17.4 111 HICKERSON PARK 9150 4.8 1.2 437 14.5 13.5 108 HOLE-IN-ROCK 9150 8.4 .0 923 14.9 13.5 111 INDIAN CREEK 9425 38.3 25.9 149 34.0 30.4 112 KELLEY R.S. 8180 15.5 11.1 139 23.9 22.2 108 STEEL CREEK PARK 10100 21.9 17.2 129 23.0 17.5 132 ----- ----- Basin wide percent of average 186 114 UPPER BEAR RIVER BUG LAKE 7950 24.9 11.5 218 28.7 23.5 123 HAYDEN FORK 9400 14.6 2.0 730 27.9 24.2 115 KELLEY R.S. 8180 15.5 11.1 139 23.9 22.2 108 LILY LAKE 9050 12.5 6.5 194 24.2 19.2 126 MONTE CRISTO 8960 38.8 22.9 170 36.8 31.7 117 SALT RIVER SUMMIT 7600 12.0 2.4 501 22.2 20.0 111 TRIAL LAKE 9960 28.0 21.7 130 30.4 29.7 103 ----- ----- Basin wide percent of average 188 114 ----------------------------------------------------------------------------- -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.