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 22 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 20.9 13.7 153 28.7 24.5 118 COTTONWOOD CREEK 7600 24.0 21.9 110 30.0 27.5 110 GRANITE CREEK 6770 20.5 15.7 131 24.2 26.0 94 GRASSY LAKE 7265 42.9 36.2 119 44.5 40.8 110 GROS VENTRE SUMMIT 8775 16.4 15.1 109 16.9 17.7 96 LEWIS LAKE DIVIDE 7860 41.3 35.8 116 42.7 41.5 103 PHILLIPS BENCH 8200 35.2 30.4 116 33.9 32.8 104 SALT RIVER SUMMIT 7600 15.2 12.5 122 19.5 18.7 105 SNAKE RIVER STATION 6920 19.9 17.7 113 27.9 28.7 98 SPRING CREEK DIVIDE 9000 32.2 29.5 109 30.4 30.0 102 THUMB DIVIDE 7980 23.5 16.4 144 24.4 23.0 107 TOGWOTEE PASS 9580 -M 27.7 * 31.0 31.2 100 TWO OCEAN PLATEAU 9360 40.8 27.2 151 34.2 33.8 101 WILLOW CREEK 8450 32.8 31.9 104 40.8 35.3 116 ----- ----- Basin wide percent of average 121 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.9 25.9 108 25.2 20.4 124 BLACK BEAR 7950 48.2 40.2 120 -M 45.0 * CANYON 7940 17.7 12.5 142 20.5 15.9 130 FISHER CREEK 9100 38.4 38.3 101 39.2 40.8 97 MADISON PLATEAU 7750 -M 24.9 * 34.3 29.0 118 NORTHEAST ENTRANCE 7350 10.5 7.8 136 15.0 13.5 112 PARKER PEAK 9400 26.0 23.5 111 -M 17.5 * SYLVAN LAKE 8420 27.9 23.9 117 30.5 21.5 142 THUMB DIVIDE 7980 23.5 16.4 144 24.4 23.0 107 TWO OCEAN PLATEAU 9360 40.8 27.2 151 34.2 33.8 101 WHISKEY CREEK 6800 21.9 16.9 129 26.0 24.2 108 WHITE MILL 8700 29.4 26.2 113 26.4 31.5 84 WOLVERINE 7650 12.0 10.2 118 13.9 14.5 96 ----- ----- Basin wide percent of average 121 108 WIND RIVER BURROUGHS CREEK 8750 17.7 14.4 124 19.5 18.7 105 COLD SPRINGS 9630 9.2 8.0 117 13.6 12.5 110 DEER PARK 9700 18.5 -M * 24.7 -M * HOBBS PARK 10100 -M 17.2 * -M 16.4 * LITTLE WARM 9620 -M 12.2 * -M 15.5 * SOUTH PASS 9040 18.2 17.9 102 21.7 19.7 111 ST. LAWRENCE ALT 8620 8.0 6.5 125 12.1 12.0 102 TOGWOTEE PASS 9580 -M 27.7 * 31.0 31.2 100 TOWNSEND CREEK 8700 11.2 10.1 111 15.9 14.7 108 ----- ----- Basin wide percent of average 114 105 BIGHORN BASIN BALD MTN. 9375 22.5 23.2 98 20.9 19.9 106 BEAR TRAP MEADOW 7900 1.4 5.8 23 11.5 10.0 116 BLACKWATER 9780 32.8 25.2 131 27.0 19.9 136 BONE SPRINGS DIV 9350 20.5 18.4 113 20.2 17.4 117 EVENING STAR 9200 35.0 30.0 117 36.8 25.0 147 GRAVE SPRINGS 8550 10.7 11.1 97 14.0 11.6 121 KIRWIN 9550 13.9 11.5 122 15.7 12.6 125 MARQUETTE 8760 12.0 8.7 137 13.0 12.5 105 MIDDLE POWDER 7760 16.7 14.2 117 20.2 14.0 144 OWL CREEK 8975 7.0 4.3 165 8.1 7.6 107 POWDER RIVER PASS 9480 13.0 11.2 116 17.4 13.9 126 SHELL CREEK 9580 18.4 16.7 111 17.2 15.1 114 SYLVAN LAKE 8420 27.9 23.9 117 30.5 21.5 142 SYLVAN ROAD 8120 -M 9.6 * -M 17.9 * TIMBER CREEK 7950 6.5 6.5 102 9.7 9.2 106 YOUNTS PEAK 8350 22.4 18.4 122 20.7 18.7 111 ----- ----- Basin wide percent of average 114 124 SHOSHONE RIVER BLACKWATER 9780 32.8 25.2 131 27.0 19.9 136 EVENING STAR 9200 35.0 30.0 117 36.8 25.0 147 KIRWIN 9550 13.9 11.5 122 15.7 12.6 125 MARQUETTE 8760 12.0 8.7 137 13.0 12.5 105 SYLVAN LAKE 8420 27.9 23.9 117 30.5 21.5 142 SYLVAN ROAD 8120 -M 9.6 * -M 17.9 * YOUNTS PEAK 8350 22.4 18.4 122 20.7 18.7 111 ----- ----- Basin wide percent of average 123 131 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.4 5.8 23 11.5 10.0 116 BIG GOOSE 7990 9.9 -M * 14.2 -M * BONE SPRINGS DIV 9350 20.5 18.4 113 20.2 17.4 117 BURGESS JUNCTION 7880 12.2 13.2 93 14.4 13.6 106 CLOUD PEAK RESERVOIR 9860 20.0 17.2 117 18.7 16.0 117 DOME LAKE 8880 -M 15.0 * 14.4 15.5 93 GRAVE SPRINGS 8550 10.7 11.1 97 14.0 11.6 121 HANSEN SAWMILL 8760 4.8 7.3 66 11.1 9.6 116 MIDDLE POWDER 7760 16.7 14.2 117 20.2 14.0 144 POWDER RIVER PASS 9480 13.0 11.2 116 17.4 13.9 126 SUCKER CREEK 8880 13.7 13.6 101 17.4 15.5 112 TIE CREEK 6870 -M -M * -M 13.0 * ----- ----- Basin wide percent of average 101 116 BELLE FOURCHE BLIND PARK 6890 3.8 10.9 36 17.7 12.7 140 NORTH RAPID CREEK 6130 5.0 -M * 16.0 -M * WARREN PEAK 6520 10.7 10.9 100 12.6 9.7 130 ----- ----- Basin wide percent of average 68 136 UPPER N. PLATTE RIVER COLUMBINE 9400 17.4 23.4 74 24.7 27.2 91 DIVIDE PEAK 8800 21.2 20.9 102 27.7 26.0 107 ELK RIVER 8700 15.0 18.7 81 24.4 21.4 115 JOE WRIGHT 10120 22.4 24.5 92 28.9 28.9 100 NORTH FRENCH CREEK 10100 35.2 28.9 122 33.5 26.7 126 OLD BATTLE 10000 33.8 36.9 92 40.3 34.2 118 SOUTH BRUSH CREEK 8400 10.5 12.0 88 21.5 19.4 111 TOWER 10500 49.8 50.0 100 42.3 41.3 103 WEBBER SPRINGS 9200 21.2 27.5 78 29.5 29.0 102 WILLOW CREEK PASS 9540 13.5 13.5 100 13.5 14.6 92 ----- ----- Basin wide percent of average 94 107 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.9 29.0 59 25.7 22.5 114 CASPER MTN. 7900 14.7 18.5 80 20.4 17.4 117 DEADMAN HILL 10220 18.4 18.4 100 19.7 19.9 99 DEER PARK 9700 18.5 -M * 24.7 -M * LAPRELE CREEK 8320 -M 8.5 * 17.4 14.0 126 RENO HILL 8400 17.2 14.6 118 22.9 21.5 107 ROACH 9700 18.7 18.2 103 23.5 24.4 97 SAND LAKE 10080 40.8 36.4 113 32.8 23.5 140 SOUTH PASS 9040 18.2 17.9 102 21.7 19.7 111 WINDY PEAK 7840 6.8 8.7 78 14.5 11.5 128 ----- ----- Basin wide percent of average 94 114 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 7.5 8.4 90 19.4 17.7 111 DIVIDE PEAK 8800 21.2 20.9 102 27.7 26.0 107 OLD BATTLE 10000 33.8 36.9 92 40.3 34.2 118 SANDSTONE RS 8150 11.4 13.0 88 22.7 21.7 105 WHISKEY PARK 8950 29.5 30.4 98 32.8 32.3 102 ----- ----- Basin wide percent of average 95 109 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.2 14.9 109 16.5 18.0 92 BLIND BULL SUM 8650 30.2 27.4 110 23.5 26.4 90 EAST RIM DIVIDE 7930 14.5 15.0 97 15.0 16.9 90 ELKHART PARK G.S. 9400 -M 14.6 * -M 17.7 * GROS VENTRE SUMMIT 8775 16.4 15.1 109 16.9 17.7 96 KENDALL R.S. 7740 14.2 12.1 118 17.7 17.2 103 LOOMIS PARK 8240 -M 16.2 * 21.4 20.9 103 NEW FORK LAKE 8340 12.5 10.0 125 13.0 16.0 82 SNIDER BASIN 8250 17.7 14.5 122 18.9 16.7 114 SPRING CREEK DIVIDE 9000 32.2 29.5 109 30.4 30.0 102 TRIPLE PEAK 8500 28.7 26.2 110 32.3 34.2 95 ----- ----- Basin wide percent of average 111 97 LOWER GREEN RIVER HAMS FORK 7840 11.0 5.8 188 12.5 14.9 85 HEWINTA 9500 10.5 7.5 142 15.9 15.5 103 HICKERSON PARK 9150 4.8 5.0 95 11.4 11.5 99 HOLE-IN-ROCK 9150 7.3 4.5 161 11.5 11.5 100 INDIAN CREEK 9425 32.4 29.9 109 27.2 28.5 96 KELLEY R.S. 8180 16.2 16.5 99 20.2 20.7 98 STEEL CREEK PARK 10100 16.5 18.4 90 18.7 15.2 123 ----- ----- Basin wide percent of average 113 100 UPPER BEAR RIVER BUG LAKE 7950 21.9 18.4 120 22.0 21.9 101 HAYDEN FORK 9400 11.9 9.0 132 22.4 21.9 102 KELLEY R.S. 8180 16.2 16.5 99 20.2 20.7 98 LILY LAKE 9050 11.7 11.1 106 19.7 17.2 116 MONTE CRISTO 8960 27.9 28.0 100 28.7 29.0 99 SALT RIVER SUMMIT 7600 15.2 12.5 122 19.5 18.7 105 TRIAL LAKE 9960 20.5 25.2 82 23.9 27.2 89 ----- ----- Basin wide percent of average 104 100 ----------------------------------------------------------------------------- -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.