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 FRIDAY: APRIL 17 , 1998 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.3 15.3 100 22.1 24.1 92 COTTONWOOD CREEK 7600 21.8 22.9 95 25.1 27.0 93 GRANITE CREEK 6770 16.0 17.2 93 21.7 25.5 85 GRASSY LAKE 7265 32.8 37.3 88 37.1 40.1 93 GROS VENTRE SUMMIT 8775 12.9 15.7 82 14.5 17.3 84 LEWIS LAKE DIVIDE 7860 33.2 36.5 91 34.6 40.8 85 PHILLIPS BENCH 8200 27.5 30.7 90 27.6 32.2 86 SALT RIVER SUMMIT 7600 15.9 13.4 119 19.6 18.3 107 SNAKE RIVER STATION 6920 17.7 18.3 97 24.1 28.1 86 SPRING CREEK DIVIDE 9000 23.3 29.4 79 23.7 29.5 80 THUMB DIVIDE 7980 17.9 17.1 105 19.4 22.5 86 TOGWOTEE PASS 9580 25.4 27.2 93 25.8 30.5 85 TWO OCEAN PLATEAU 9360 30.4 26.7 114 29.6 33.2 89 WILLOW CREEK 8450 29.5 31.7 93 34.2 34.7 99 ----- ----- Basin wide percent of average 94 89 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 20.6 25.6 80 17.9 19.8 90 BLACK BEAR 7950 42.1 40.2 105 38.9 44.1 88 CANYON 7940 13.8 13.2 105 16.3 15.4 106 FISHER CREEK 9100 32.2 38.0 85 29.4 39.8 74 MADISON PLATEAU 7750 23.4 25.4 92 25.4 28.4 89 NORTHEAST ENTRANCE 7350 6.3 8.6 73 12.6 13.0 97 PARKER PEAK 9400 20.2 23.3 87 17.5 17.0 103 SYLVAN LAKE 8420 19.5 23.9 82 22.1 20.9 106 THUMB DIVIDE 7980 17.9 17.1 105 19.4 22.5 86 TWO OCEAN PLATEAU 9360 30.4 26.7 114 29.6 33.2 89 WHISKEY CREEK 6800 16.3 17.8 92 21.1 23.6 89 WHITE MILL 8700 24.9 25.9 96 22.8 30.8 74 WOLVERINE 7650 9.0 11.3 80 10.7 14.1 76 ----- ----- Basin wide percent of average 93 88 WIND RIVER BURROUGHS CREEK 8750 17.5 15.0 117 19.0 18.1 105 COLD SPRINGS 9630 12.6 8.5 148 14.1 11.9 118 DEER PARK 9700 -M -M * 23.7 -M * HOBBS PARK 10100 18.7 16.7 112 16.7 15.9 105 LITTLE WARM 9620 12.5 13.1 95 15.1 14.9 101 SOUTH PASS 9040 18.3 17.7 103 20.5 19.0 108 ST. LAWRENCE ALT 8620 11.9 6.9 172 12.2 11.4 107 TOGWOTEE PASS 9580 25.4 27.2 93 25.8 30.5 85 TOWNSEND CREEK 8700 13.2 10.3 128 16.2 14.1 115 ----- ----- Basin wide percent of average 113 103 BIGHORN BASIN BALD MTN. 9375 22.2 22.5 99 19.5 19.2 102 BEAR TRAP MEADOW 7900 8.3 6.6 126 10.9 9.5 115 BLACKWATER 9780 21.9 24.8 88 19.7 19.4 102 BONE SPRINGS DIV 9350 19.7 18.1 109 18.6 16.7 111 EVENING STAR 9200 24.6 29.4 84 26.6 24.4 109 GRAVE SPRINGS 8550 12.9 -M * 13.4 11.1 121 KIRWIN 9550 14.1 11.2 126 15.3 12.1 126 MARQUETTE 8760 15.6 8.7 179 15.6 11.6 134 MIDDLE POWDER 7760 13.1 13.8 95 12.6 13.4 94 OWL CREEK 8975 9.8 4.5 218 9.3 7.2 129 POWDER RIVER PASS 9480 14.5 11.5 126 15.4 13.2 117 SHELL CREEK 9580 16.5 16.3 101 12.9 14.6 88 SYLVAN LAKE 8420 19.5 23.9 82 22.1 20.9 106 SYLVAN ROAD 8120 10.1 10.4 97 15.1 17.5 86 TIMBER CREEK 7950 10.5 6.5 162 12.5 8.6 145 YOUNTS PEAK 8350 16.0 18.3 87 16.4 18.1 91 ----- ----- Basin wide percent of average 104 108 SHOSHONE RIVER BLACKWATER 9780 21.9 24.8 88 19.7 19.4 102 EVENING STAR 9200 24.6 29.4 84 26.6 24.4 109 KIRWIN 9550 14.1 11.2 126 15.3 12.1 126 MARQUETTE 8760 15.6 8.7 179 15.6 11.6 134 SYLVAN LAKE 8420 19.5 23.9 82 22.1 20.9 106 SYLVAN ROAD 8120 10.1 10.4 97 15.1 17.5 86 YOUNTS PEAK 8350 16.0 18.3 87 16.4 18.1 91 ----- ----- Basin wide percent of average 96 105 POWDER-TONGUE BEAR TRAP MEADOW 7900 8.3 6.6 126 10.9 9.5 115 BONE SPRINGS DIV 9350 19.7 18.1 109 18.6 16.7 111 BURGESS JUNCTION 7880 12.9 13.0 99 14.1 13.0 108 CLOUD PEAK RESERVOIR 9860 18.4 16.9 109 18.6 15.3 122 DOME LAKE 8880 -M 14.8 * 15.5 14.9 104 GRAVE SPRINGS 8550 12.9 -M * 13.4 11.1 121 HANSEN SAWMILL 8760 11.3 7.5 151 13.2 9.2 143 MIDDLE POWDER 7760 13.1 13.8 95 12.6 13.4 94 POWDER RIVER PASS 9480 14.5 11.5 126 15.4 13.2 117 SUCKER CREEK 8880 13.9 13.4 104 15.5 14.9 104 TIE CREEK 6870 8.8 -M * 15.5 12.5 124 ----- ----- Basin wide percent of average 111 114 BELLE FOURCHE BLIND PARK 6890 8.2 11.3 73 13.6 12.0 113 NORTH RAPID CREEK 6130 9.4 -M * 11.2 -M * WARREN PEAK 6520 12.8 11.3 113 12.0 9.2 130 ----- ----- Basin wide percent of average 93 121 UPPER N. PLATTE RIVER COLUMBINE 9400 19.5 24.1 81 24.3 26.4 92 DIVIDE PEAK 8800 21.2 21.5 99 21.9 25.2 87 ELK RIVER 8700 18.1 19.9 91 21.7 20.7 105 JOE WRIGHT 10120 22.7 24.3 93 25.6 27.8 92 NORTH FRENCH CREEK 10100 34.1 28.4 120 31.6 25.9 122 OLD BATTLE 10000 35.3 36.1 98 37.9 33.1 115 SOUTH BRUSH CREEK 8400 5.9 12.7 46 13.9 18.6 75 TOWER 10500 51.4 49.3 104 41.0 39.9 103 WEBBER SPRINGS 9200 21.6 28.3 76 27.6 28.1 98 WILLOW CREEK PASS 9540 8.7 13.5 64 8.7 14.1 62 ----- ----- Basin wide percent of average 92 98 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 24.8 29.0 86 23.8 21.7 110 CASPER MTN. 7900 13.2 18.9 70 14.2 16.6 86 DEADMAN HILL 10220 16.0 18.0 89 15.8 19.0 83 DEER PARK 9700 -M -M * 23.7 -M * LAPRELE CREEK 8320 9.3 9.5 98 12.4 13.3 93 RENO HILL 8400 13.7 15.2 90 13.1 20.9 63 ROACH 9700 16.1 18.1 89 18.5 23.6 78 SAND LAKE 10080 30.2 35.9 84 26.4 22.7 116 SOUTH PASS 9040 18.3 17.7 103 20.5 19.0 108 WINDY PEAK 7840 7.8 9.1 86 10.3 10.9 94 ----- ----- Basin wide percent of average 87 92 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.2 10.1 111 16.7 17.0 98 DIVIDE PEAK 8800 21.2 21.5 99 21.9 25.2 87 OLD BATTLE 10000 35.3 36.1 98 37.9 33.1 115 SANDSTONE RS 8150 14.7 14.6 101 21.1 20.9 101 WHISKEY PARK 8950 30.8 30.6 101 30.3 31.3 97 ----- ----- Basin wide percent of average 100 100 UPPER GREEN RIVER BIG SANDY OPENING 9100 14.2 15.2 93 13.5 17.6 77 BLIND BULL SUM 8650 25.8 30.0 86 20.6 25.8 80 EAST RIM DIVIDE 7930 13.7 15.0 91 13.3 16.5 81 ELKHART PARK G.S. 9400 14.1 14.9 95 14.8 17.3 86 GROS VENTRE SUMMIT 8775 12.9 15.7 82 14.5 17.3 84 KENDALL R.S. 7740 14.4 12.8 112 16.1 16.8 96 LOOMIS PARK 8240 -M 16.7 * 18.8 20.4 92 NEW FORK LAKE 8340 12.2 10.5 116 11.7 15.7 75 SNIDER BASIN 8250 13.5 15.2 89 13.7 16.4 84 SPRING CREEK DIVIDE 9000 23.3 29.4 79 23.7 29.5 80 TRIPLE PEAK 8500 22.1 26.7 83 23.7 33.5 71 ----- ----- Basin wide percent of average 90 81 LOWER GREEN RIVER HAMS FORK 7840 11.3 5.7 198 12.7 14.5 88 HEWINTA 9500 14.9 8.5 175 16.6 14.8 112 HICKERSON PARK 9150 15.0 6.1 246 14.7 11.0 134 HOLE-IN-ROCK 9150 11.7 5.7 205 12.8 11.0 116 INDIAN CREEK 9425 26.4 30.2 87 21.3 28.0 76 KELLEY R.S. 8180 16.3 17.3 94 17.9 20.3 88 STEEL CREEK PARK 10100 19.1 18.0 106 20.4 14.6 140 ----- ----- Basin wide percent of average 125 102 UPPER BEAR RIVER BUG LAKE 7950 22.1 19.5 113 22.8 21.2 108 HAYDEN FORK 9400 15.3 10.3 149 23.1 21.2 109 KELLEY R.S. 8180 16.3 17.3 94 17.9 20.3 88 LILY LAKE 9050 16.3 12.4 131 20.1 16.5 122 MONTE CRISTO 8960 32.5 28.9 112 29.0 28.2 103 SALT RIVER SUMMIT 7600 15.9 13.4 119 19.6 18.3 107 TRIAL LAKE 9960 24.9 25.8 97 26.0 26.3 99 ----- ----- Basin wide percent of average 112 104 ----------------------------------------------------------------------------- -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.