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 MONDAY: APRIL 20 , 1998 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.5 14.3 108 22.4 24.3 92 COTTONWOOD CREEK 7600 22.0 22.3 99 25.3 27.3 93 GRANITE CREEK 6770 16.1 16.3 99 22.1 25.8 86 GRASSY LAKE 7265 33.0 36.6 90 37.6 40.5 93 GROS VENTRE SUMMIT 8775 12.9 15.3 84 14.6 17.4 84 LEWIS LAKE DIVIDE 7860 33.3 36.1 92 34.9 41.2 85 PHILLIPS BENCH 8200 27.5 30.5 90 27.8 32.5 86 SALT RIVER SUMMIT 7600 15.8 12.9 122 19.8 18.5 107 SNAKE RIVER STATION 6920 17.9 17.9 100 24.5 28.4 86 SPRING CREEK DIVIDE 9000 23.6 29.5 80 23.8 29.8 80 THUMB DIVIDE 7980 18.1 16.7 108 19.7 22.8 86 TOGWOTEE PASS 9580 25.5 27.4 93 26.4 30.8 86 TWO OCEAN PLATEAU 9360 30.8 26.9 114 29.7 33.5 89 WILLOW CREEK 8450 29.9 31.8 94 34.5 35.0 99 ----- ----- Basin wide percent of average 96 89 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 20.7 25.7 81 18.1 20.1 90 BLACK BEAR 7950 42.2 40.1 105 39.5 44.6 89 CANYON 7940 13.7 12.7 108 16.3 15.6 104 FISHER CREEK 9100 32.2 38.2 84 30.4 40.3 75 MADISON PLATEAU 7750 23.4 25.0 94 25.5 28.7 89 NORTHEAST ENTRANCE 7350 6.3 8.0 79 12.6 13.2 95 PARKER PEAK 9400 20.4 23.4 87 17.7 17.3 102 SYLVAN LAKE 8420 19.7 23.9 82 22.4 21.2 106 THUMB DIVIDE 7980 18.1 16.7 108 19.7 22.8 86 TWO OCEAN PLATEAU 9360 30.8 26.9 114 29.7 33.5 89 WHISKEY CREEK 6800 16.5 17.3 95 21.1 23.9 88 WHITE MILL 8700 25.0 26.0 96 22.9 31.2 73 WOLVERINE 7650 9.0 10.6 85 11.0 14.3 77 ----- ----- Basin wide percent of average 94 88 WIND RIVER BURROUGHS CREEK 8750 17.7 14.6 121 19.2 18.4 104 COLD SPRINGS 9630 12.9 8.1 159 14.5 12.2 119 DEER PARK 9700 -M -M * 24.1 -M * HOBBS PARK 10100 19.5 17.0 115 17.3 16.2 107 LITTLE WARM 9620 12.9 12.5 103 15.6 15.2 103 SOUTH PASS 9040 18.5 17.8 104 20.7 19.3 107 ST. LAWRENCE ALT 8620 12.0 6.6 182 12.5 11.7 107 TOGWOTEE PASS 9580 25.5 27.4 93 26.4 30.8 86 TOWNSEND CREEK 8700 13.4 10.1 133 16.7 14.4 116 ----- ----- Basin wide percent of average 116 103 BIGHORN BASIN BALD MTN. 9375 22.7 22.9 99 19.9 19.6 102 BEAR TRAP MEADOW 7900 8.5 6.1 139 11.3 9.7 116 BLACKWATER 9780 22.4 25.0 90 20.0 19.7 102 BONE SPRINGS DIV 9350 20.3 18.2 112 19.1 17.0 112 EVENING STAR 9200 24.8 29.7 84 26.8 24.7 109 GRAVE SPRINGS 8550 13.2 -M * 13.7 11.4 120 KIRWIN 9550 14.4 11.3 127 15.6 12.4 126 MARQUETTE 8760 16.2 8.7 186 16.1 12.0 134 MIDDLE POWDER 7760 13.7 14.0 98 13.1 13.7 96 OWL CREEK 8975 9.9 4.3 230 9.6 7.4 130 POWDER RIVER PASS 9480 14.8 11.3 131 15.8 13.5 117 SHELL CREEK 9580 17.1 16.5 104 13.5 14.9 91 SYLVAN LAKE 8420 19.7 23.9 82 22.4 21.2 106 SYLVAN ROAD 8120 10.1 9.9 102 15.3 17.7 86 TIMBER CREEK 7950 10.7 6.4 167 12.7 8.9 143 YOUNTS PEAK 8350 16.1 18.3 88 16.5 18.3 90 ----- ----- Basin wide percent of average 107 108 SHOSHONE RIVER BLACKWATER 9780 22.4 25.0 90 20.0 19.7 102 EVENING STAR 9200 24.8 29.7 84 26.8 24.7 109 KIRWIN 9550 14.4 11.3 127 15.6 12.4 126 MARQUETTE 8760 16.2 8.7 186 16.1 12.0 134 SYLVAN LAKE 8420 19.7 23.9 82 22.4 21.2 106 SYLVAN ROAD 8120 10.1 9.9 102 15.3 17.7 86 YOUNTS PEAK 8350 16.1 18.3 88 16.5 18.3 90 ----- ----- Basin wide percent of average 98 105 POWDER-TONGUE BEAR TRAP MEADOW 7900 8.5 6.1 139 11.3 9.7 116 BONE SPRINGS DIV 9350 20.3 18.2 112 19.1 17.0 112 BURGESS JUNCTION 7880 13.5 13.1 103 14.7 13.3 111 CLOUD PEAK RESERVOIR 9860 19.0 17.1 111 19.2 15.7 122 DOME LAKE 8880 -M 14.9 * 15.9 15.2 105 GRAVE SPRINGS 8550 13.2 -M * 13.7 11.4 120 HANSEN SAWMILL 8760 11.4 7.4 154 13.4 9.4 143 MIDDLE POWDER 7760 13.7 14.0 98 13.1 13.7 96 POWDER RIVER PASS 9480 14.8 11.3 131 15.8 13.5 117 SUCKER CREEK 8880 14.5 13.5 107 16.3 15.3 107 TIE CREEK 6870 9.3 -M * 15.9 12.8 124 ----- ----- Basin wide percent of average 115 115 BELLE FOURCHE BLIND PARK 6890 8.4 11.0 76 14.0 12.4 113 NORTH RAPID CREEK 6130 9.9 -M * 11.5 -M * WARREN PEAK 6520 13.3 11.0 121 12.2 9.5 128 ----- ----- Basin wide percent of average 99 120 UPPER N. PLATTE RIVER COLUMBINE 9400 20.2 23.7 85 25.0 26.8 93 DIVIDE PEAK 8800 21.4 21.0 102 22.5 25.7 88 ELK RIVER 8700 18.7 19.1 98 21.9 21.0 104 JOE WRIGHT 10120 23.2 24.4 95 26.1 28.4 92 NORTH FRENCH CREEK 10100 34.0 28.6 119 32.2 26.4 122 OLD BATTLE 10000 35.9 36.6 98 38.2 33.7 113 SOUTH BRUSH CREEK 8400 5.3 12.2 43 14.2 19.0 75 TOWER 10500 52.9 49.7 106 40.9 40.6 101 WEBBER SPRINGS 9200 21.8 27.8 78 28.2 28.6 99 WILLOW CREEK PASS 9540 9.3 13.5 69 9.2 14.4 64 ----- ----- Basin wide percent of average 95 98 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.4 29.0 88 24.2 22.2 109 CASPER MTN. 7900 13.7 18.6 74 14.8 17.0 87 DEADMAN HILL 10220 16.9 18.2 93 16.6 19.5 85 DEER PARK 9700 -M -M * 24.1 -M * LAPRELE CREEK 8320 9.6 8.8 109 12.6 13.6 93 RENO HILL 8400 14.2 14.8 96 13.6 21.2 64 ROACH 9700 16.6 18.1 92 19.0 24.1 79 SAND LAKE 10080 31.0 36.2 86 26.9 23.2 116 SOUTH PASS 9040 18.5 17.8 104 20.7 19.3 107 WINDY PEAK 7840 8.0 8.9 90 10.9 11.2 97 ----- ----- Basin wide percent of average 90 93 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.1 9.0 123 17.0 17.3 98 DIVIDE PEAK 8800 21.4 21.0 102 22.5 25.7 88 OLD BATTLE 10000 35.9 36.6 98 38.2 33.7 113 SANDSTONE RS 8150 14.9 13.6 110 21.5 21.4 100 WHISKEY PARK 8950 31.3 30.4 103 30.6 31.9 96 ----- ----- Basin wide percent of average 104 100 UPPER GREEN RIVER BIG SANDY OPENING 9100 14.4 14.9 97 13.6 17.8 76 BLIND BULL SUM 8650 25.9 28.4 91 20.7 26.1 79 EAST RIM DIVIDE 7930 13.8 14.9 93 13.3 16.6 80 ELKHART PARK G.S. 9400 14.3 14.7 97 15.0 17.5 86 GROS VENTRE SUMMIT 8775 12.9 15.3 84 14.6 17.4 84 KENDALL R.S. 7740 14.4 12.3 117 16.5 17.0 97 LOOMIS PARK 8240 -M 16.3 * 18.9 20.6 92 NEW FORK LAKE 8340 12.2 10.2 120 12.0 15.8 76 SNIDER BASIN 8250 13.5 14.7 92 13.9 16.6 84 SPRING CREEK DIVIDE 9000 23.6 29.5 80 23.8 29.8 80 TRIPLE PEAK 8500 22.0 26.3 84 23.9 33.8 71 ----- ----- Basin wide percent of average 92 81 LOWER GREEN RIVER HAMS FORK 7840 10.7 5.7 188 12.7 14.7 86 HEWINTA 9500 16.3 7.8 209 17.0 15.1 113 HICKERSON PARK 9150 15.3 5.4 283 14.9 11.3 132 HOLE-IN-ROCK 9150 11.9 5.0 238 13.0 11.3 115 INDIAN CREEK 9425 26.5 29.9 89 21.5 28.2 76 KELLEY R.S. 8180 16.2 16.8 96 18.1 20.5 88 STEEL CREEK PARK 10100 19.5 18.2 107 20.8 14.9 140 ----- ----- Basin wide percent of average 131 102 UPPER BEAR RIVER BUG LAKE 7950 22.3 18.8 119 23.0 21.5 107 HAYDEN FORK 9400 15.6 9.5 164 23.4 21.6 108 KELLEY R.S. 8180 16.2 16.8 96 18.1 20.5 88 LILY LAKE 9050 16.2 11.6 140 20.3 16.8 121 MONTE CRISTO 8960 32.5 28.3 115 29.2 28.6 102 SALT RIVER SUMMIT 7600 15.8 12.9 122 19.8 18.5 107 TRIAL LAKE 9960 25.1 25.4 99 26.1 26.7 98 ----- ----- Basin wide percent of average 117 104 ----------------------------------------------------------------------------- -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.