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 SUNDAY: FEBRUARY 21 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 20.6 14.8 139 -M 19.0 * COTTONWOOD CREEK 7600 20.1 17.3 116 22.9 20.9 110 GRANITE CREEK 6770 18.2 14.5 126 19.9 20.0 100 GRASSY LAKE 7265 34.6 29.7 116 34.0 30.8 110 GROS VENTRE SUMMIT 8775 13.2 12.2 108 13.0 13.5 96 LEWIS LAKE DIVIDE 7860 33.3 27.7 120 28.5 31.3 91 PHILLIPS BENCH 8200 26.8 22.9 117 23.6 24.7 96 SALT RIVER SUMMIT 7600 13.6 11.2 121 15.6 14.3 109 SNAKE RIVER STATION 6920 18.4 15.2 121 21.8 21.6 101 SPRING CREEK DIVIDE 9000 23.9 21.8 110 23.7 22.8 104 THUMB DIVIDE 7980 19.7 13.5 146 18.6 17.8 104 TOGWOTEE PASS 9580 -M 19.7 * 24.4 23.4 104 TWO OCEAN PLATEAU 9360 30.8 21.2 145 23.3 26.2 89 WILLOW CREEK 8450 27.5 24.7 111 31.3 26.9 116 ----- ----- Basin wide percent of average 122 102 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 21.8 18.8 116 19.4 14.2 137 BLACK BEAR 7950 42.0 29.8 141 -M 31.6 * CANYON 7940 15.7 10.0 157 16.2 11.5 141 FISHER CREEK 9100 33.5 28.6 117 -M 29.0 * MADISON PLATEAU 7750 -M 19.4 * 24.2 20.5 118 NORTHEAST ENTRANCE 7350 10.5 7.6 138 12.1 9.7 125 PARKER PEAK 9400 19.7 17.0 116 -M 12.4 * SYLVAN LAKE 8420 22.2 17.5 127 24.2 15.4 157 THUMB DIVIDE 7980 19.7 13.5 146 18.6 17.8 104 TWO OCEAN PLATEAU 9360 30.8 21.2 145 23.3 26.2 89 WHISKEY CREEK 6800 17.7 13.5 131 19.3 17.0 114 WHITE MILL 8700 22.5 20.1 112 20.3 22.5 90 WOLVERINE 7650 12.4 9.5 131 11.3 10.4 109 ----- ----- Basin wide percent of average 130 114 WIND RIVER BURROUGHS CREEK 8750 14.8 12.4 119 16.2 13.2 123 COLD SPRINGS 9630 8.1 6.7 121 10.0 8.0 125 DEER PARK 9700 14.8 -M * 19.3 -M * HOBBS PARK 10100 14.6 11.5 127 13.8 10.6 130 LITTLE WARM 9620 11.7 8.6 136 12.8 10.3 124 SOUTH PASS 9040 15.7 13.3 118 16.8 12.9 130 ST. LAWRENCE ALT 8620 6.3 5.8 109 9.2 7.5 123 TOGWOTEE PASS 9580 -M 19.7 * 24.4 23.4 104 TOWNSEND CREEK 8700 8.3 7.5 111 11.0 9.2 120 ----- ----- Basin wide percent of average 121 120 BIGHORN BASIN BALD MTN. 9375 16.3 16.1 101 15.1 13.4 113 BEAR TRAP MEADOW 7900 5.7 5.6 102 7.9 6.0 132 BLACKWATER 9780 25.3 16.9 150 21.5 14.3 150 BONE SPRINGS DIV 9350 12.8 12.6 102 12.9 11.0 117 EVENING STAR 9200 28.7 21.3 135 27.6 17.9 154 GRAVE SPRINGS 8550 5.9 7.1 83 8.8 7.1 124 KIRWIN 9550 10.8 7.6 142 12.5 8.1 154 MARQUETTE 8760 6.7 6.2 108 7.4 6.7 110 MIDDLE POWDER 7760 6.5 9.1 71 12.2 8.8 139 OWL CREEK 8975 5.3 3.4 156 5.8 4.6 126 POWDER RIVER PASS 9480 10.4 8.3 125 -M 8.9 * SHELL CREEK 9580 14.0 12.0 117 13.1 10.1 130 SYLVAN LAKE 8420 22.2 17.5 127 24.2 15.4 157 SYLVAN ROAD 8120 -M 10.5 * -M 12.9 * TIMBER CREEK 7950 4.5 4.6 98 6.3 4.8 131 YOUNTS PEAK 8350 18.4 14.1 130 16.2 13.2 123 ----- ----- Basin wide percent of average 119 135 SHOSHONE RIVER BLACKWATER 9780 25.3 16.9 150 21.5 14.3 150 EVENING STAR 9200 28.7 21.3 135 27.6 17.9 154 KIRWIN 9550 10.8 7.6 142 12.5 8.1 154 MARQUETTE 8760 6.7 6.2 108 7.4 6.7 110 SYLVAN LAKE 8420 22.2 17.5 127 24.2 15.4 157 SYLVAN ROAD 8120 -M 10.5 * -M 12.9 * YOUNTS PEAK 8350 18.4 14.1 130 16.2 13.2 123 ----- ----- Basin wide percent of average 134 145 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.7 5.6 102 7.9 6.0 132 BIG GOOSE 7990 4.8 -M * 7.7 -M * BONE SPRINGS DIV 9350 12.8 12.6 102 12.9 11.0 117 BURGESS JUNCTION 7880 6.5 9.1 71 8.4 8.2 102 CLOUD PEAK RESERVOIR 9860 11.6 10.2 114 9.7 9.7 100 DOME LAKE 8880 6.7 10.6 63 9.5 9.9 96 GRAVE SPRINGS 8550 5.9 7.1 83 8.8 7.1 124 HANSEN SAWMILL 8760 4.3 5.4 80 6.9 5.7 121 MIDDLE POWDER 7760 6.5 9.1 71 12.2 8.8 139 POWDER RIVER PASS 9480 10.4 8.3 125 -M 8.9 * SUCKER CREEK 8880 8.1 9.1 89 10.3 10.0 103 TIE CREEK 6870 2.7 -M * 6.5 7.8 83 ----- ----- Basin wide percent of average 90 111 BELLE FOURCHE BLIND PARK 6890 6.1 8.6 71 13.1 7.2 182 NORTH RAPID CREEK 6130 4.6 -M * 11.1 -M * WARREN PEAK 6520 7.5 8.6 87 11.7 5.9 198 ----- ----- Basin wide percent of average 79 189 UPPER N. PLATTE RIVER COLUMBINE 9400 16.8 19.5 86 17.5 19.3 91 DIVIDE PEAK 8800 16.0 15.8 101 20.7 18.0 115 ELK RIVER 8700 15.1 15.6 97 18.7 14.6 128 JOE WRIGHT 10120 16.2 16.5 98 22.0 19.1 115 NORTH FRENCH CREEK 10100 23.8 19.1 125 24.6 17.8 138 OLD BATTLE 10000 23.3 24.6 95 29.8 23.0 130 SOUTH BRUSH CREEK 8400 -M 8.7 * 16.2 12.3 132 TOWER 10500 35.7 35.3 101 32.9 28.3 116 WEBBER SPRINGS 9200 15.6 21.0 74 21.4 19.5 110 WILLOW CREEK PASS 9540 9.8 8.7 113 9.9 9.3 106 ----- ----- Basin wide percent of average 98 118 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 17.4 18.8 93 18.5 14.5 128 CASPER MTN. 7900 9.2 11.4 81 14.1 10.2 138 DEADMAN HILL 10220 -M 12.9 * 14.8 12.2 121 DEER PARK 9700 14.8 -M * 19.3 -M * LAPRELE CREEK 8320 -M 7.9 * 12.3 8.7 141 RENO HILL 8400 11.1 10.1 110 15.5 13.7 113 ROACH 9700 14.2 13.1 108 16.7 16.4 102 SAND LAKE 10080 27.0 25.3 107 23.6 15.5 152 SOUTH PASS 9040 15.7 13.3 118 16.8 12.9 130 WINDY PEAK 7840 5.1 5.7 89 10.9 6.8 160 ----- ----- Basin wide percent of average 102 129 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.1 9.1 133 15.3 12.1 126 DIVIDE PEAK 8800 16.0 15.8 101 20.7 18.0 115 OLD BATTLE 10000 23.3 24.6 95 29.8 23.0 130 SANDSTONE RS 8150 11.2 11.4 98 17.8 14.8 120 WHISKEY PARK 8950 21.7 22.1 98 22.9 21.8 105 ----- ----- Basin wide percent of average 102 119 UPPER GREEN RIVER BIG SANDY OPENING 9100 13.8 11.3 122 12.8 13.8 93 BLIND BULL SUM 8650 24.7 22.9 108 19.6 19.8 99 EAST RIM DIVIDE 7930 11.9 11.2 106 12.3 12.9 95 ELKHART PARK G.S. 9400 11.8 10.8 109 12.3 13.6 90 GROS VENTRE SUMMIT 8775 13.2 12.2 108 13.0 13.5 96 KENDALL R.S. 7740 13.6 11.8 115 13.0 13.2 98 LOOMIS PARK 8240 -M 14.0 * 17.3 15.9 109 NEW FORK LAKE 8340 10.8 9.3 116 10.6 12.2 87 SNIDER BASIN 8250 14.0 11.9 118 13.9 12.9 108 SPRING CREEK DIVIDE 9000 23.9 21.8 110 23.7 22.8 104 TRIPLE PEAK 8500 22.5 20.6 109 24.0 26.4 91 ----- ----- Basin wide percent of average 111 97 LOWER GREEN RIVER HAMS FORK 7840 11.1 9.9 112 9.6 11.3 85 HEWINTA 9500 8.8 7.8 113 11.5 9.7 119 HICKERSON PARK 9150 5.6 4.6 122 8.0 6.9 116 HOLE-IN-ROCK 9150 5.7 4.2 136 8.5 6.9 123 INDIAN CREEK 9425 24.3 21.6 112 20.1 21.3 94 KELLEY R.S. 8180 14.3 13.3 108 15.9 15.9 100 STEEL CREEK PARK 10100 11.4 11.6 98 13.2 9.8 135 ----- ----- Basin wide percent of average 111 106 UPPER BEAR RIVER BUG LAKE 7950 17.6 15.7 112 16.3 15.0 109 HAYDEN FORK 9400 12.1 12.7 95 15.9 14.3 111 KELLEY R.S. 8180 14.3 13.3 108 15.9 15.9 100 LILY LAKE 9050 10.9 10.0 109 14.7 11.1 132 MONTE CRISTO 8960 21.7 21.4 101 21.8 19.6 111 SALT RIVER SUMMIT 7600 13.6 11.2 121 15.6 14.3 109 TRIAL LAKE 9960 16.7 19.5 86 17.6 18.4 96 ----- ----- Basin wide percent of average 103 108 ----------------------------------------------------------------------------- -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.