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 27 , 1998 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 13.1 12.0 109 22.9 24.9 92 COTTONWOOD CREEK 7600 18.9 20.8 91 25.6 27.9 92 GRANITE CREEK 6770 14.3 14.1 101 22.2 26.4 84 GRASSY LAKE 7265 32.0 34.9 92 38.3 41.4 93 GROS VENTRE SUMMIT 8775 12.2 14.4 85 14.9 17.9 83 LEWIS LAKE DIVIDE 7860 33.0 35.0 94 35.2 42.1 84 PHILLIPS BENCH 8200 28.0 29.9 94 28.9 33.2 87 SALT RIVER SUMMIT 7600 13.8 11.6 119 20.0 18.9 106 SNAKE RIVER STATION 6920 15.5 16.9 92 24.8 29.0 86 SPRING CREEK DIVIDE 9000 24.6 29.6 83 24.2 30.4 80 THUMB DIVIDE 7980 16.6 15.7 106 19.9 23.3 85 TOGWOTEE PASS 9580 25.6 28.0 91 26.7 31.5 85 TWO OCEAN PLATEAU 9360 31.7 27.4 116 30.3 34.3 88 WILLOW CREEK 8450 26.7 31.9 84 35.0 35.8 98 ----- ----- Basin wide percent of average 95 88 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 20.5 25.9 79 18.2 20.8 88 BLACK BEAR 7950 41.7 39.9 105 39.9 45.8 87 CANYON 7940 12.5 11.6 108 16.4 16.0 102 FISHER CREEK 9100 32.0 38.5 83 30.7 41.5 74 MADISON PLATEAU 7750 22.4 24.3 92 25.7 29.5 87 NORTHEAST ENTRANCE 7350 3.3 6.7 49 12.7 13.6 93 PARKER PEAK 9400 20.4 23.6 86 17.8 17.9 99 SYLVAN LAKE 8420 18.4 23.8 77 22.6 21.9 103 THUMB DIVIDE 7980 16.6 15.7 106 19.9 23.3 85 TWO OCEAN PLATEAU 9360 31.7 27.4 116 30.3 34.3 88 WHISKEY CREEK 6800 15.9 15.9 100 21.3 24.5 87 WHITE MILL 8700 24.5 26.2 94 23.0 32.1 72 WOLVERINE 7650 5.8 9.0 64 10.9 14.9 73 ----- ----- Basin wide percent of average 92 86 WIND RIVER BURROUGHS CREEK 8750 17.1 13.5 127 19.3 19.0 102 COLD SPRINGS 9630 11.6 7.3 159 14.7 12.8 115 DEER PARK 9700 -M -M * 24.5 -M * HOBBS PARK 10100 19.6 17.6 111 18.0 16.9 107 LITTLE WARM 9620 12.3 11.2 110 15.9 15.9 100 SOUTH PASS 9040 17.4 18.0 97 21.0 20.1 104 ST. LAWRENCE ALT 8620 11.3 5.8 195 12.7 12.2 104 TOGWOTEE PASS 9580 25.6 28.0 91 26.7 31.5 85 TOWNSEND CREEK 8700 12.9 9.7 133 17.0 15.1 113 ----- ----- Basin wide percent of average 115 101 BIGHORN BASIN BALD MTN. 9375 22.7 23.7 96 20.4 20.3 100 BEAR TRAP MEADOW 7900 5.7 4.9 116 11.3 10.3 110 BLACKWATER 9780 22.7 25.4 89 20.4 20.3 100 BONE SPRINGS DIV 9350 19.7 18.3 108 19.7 17.7 111 EVENING STAR 9200 23.9 30.4 79 27.1 25.5 106 GRAVE SPRINGS 8550 12.7 -M * 13.9 12.0 116 KIRWIN 9550 13.8 11.6 119 15.9 13.0 122 MARQUETTE 8760 14.6 8.6 170 16.2 13.0 125 MIDDLE POWDER 7760 13.0 14.5 90 13.4 14.4 93 OWL CREEK 8975 8.2 3.7 222 9.7 7.8 124 POWDER RIVER PASS 9480 13.7 10.8 127 16.1 14.3 113 SHELL CREEK 9580 17.4 16.8 104 13.8 15.5 89 SYLVAN LAKE 8420 18.4 23.8 77 22.6 21.9 103 SYLVAN ROAD 8120 7.8 8.6 91 15.4 18.3 84 TIMBER CREEK 7950 9.5 6.2 153 12.7 9.6 132 YOUNTS PEAK 8350 16.1 18.3 88 16.7 19.0 88 ----- ----- Basin wide percent of average 101 105 SHOSHONE RIVER BLACKWATER 9780 22.7 25.4 89 20.4 20.3 100 EVENING STAR 9200 23.9 30.4 79 27.1 25.5 106 KIRWIN 9550 13.8 11.6 119 15.9 13.0 122 MARQUETTE 8760 14.6 8.6 170 16.2 13.0 125 SYLVAN LAKE 8420 18.4 23.8 77 22.6 21.9 103 SYLVAN ROAD 8120 7.8 8.6 91 15.4 18.3 84 YOUNTS PEAK 8350 16.1 18.3 88 16.7 19.0 88 ----- ----- Basin wide percent of average 93 103 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.7 4.9 116 11.3 10.3 110 BONE SPRINGS DIV 9350 19.7 18.3 108 19.7 17.7 111 BURGESS JUNCTION 7880 13.2 13.4 99 15.0 14.0 107 CLOUD PEAK RESERVOIR 9860 19.1 17.5 109 19.7 16.6 119 DOME LAKE 8880 -M 15.0 * 16.4 16.0 102 GRAVE SPRINGS 8550 12.7 -M * 13.9 12.0 116 HANSEN SAWMILL 8760 9.7 7.1 137 13.6 10.0 136 MIDDLE POWDER 7760 13.0 14.5 90 13.4 14.4 93 POWDER RIVER PASS 9480 13.7 10.8 127 16.1 14.3 113 SUCKER CREEK 8880 14.0 13.7 102 16.7 16.0 104 TIE CREEK 6870 7.7 -M * 16.3 13.4 122 ----- ----- Basin wide percent of average 108 111 BELLE FOURCHE BLIND PARK 6890 4.3 10.1 43 13.8 13.3 104 NORTH RAPID CREEK 6130 6.5 -M * 11.7 -M * WARREN PEAK 6520 10.0 10.1 99 12.3 10.0 123 ----- ----- Basin wide percent of average 71 112 UPPER N. PLATTE RIVER COLUMBINE 9400 17.4 22.7 77 25.2 27.6 91 DIVIDE PEAK 8800 19.0 19.9 95 22.4 26.7 84 ELK RIVER 8700 14.8 17.2 86 22.8 21.7 105 JOE WRIGHT 10120 23.7 24.6 96 27.2 29.6 92 NORTH FRENCH CREEK 10100 33.8 29.1 116 32.6 27.4 119 OLD BATTLE 10000 36.0 37.6 96 38.8 35.0 111 SOUTH BRUSH CREEK 8400 4.7 11.2 42 14.4 20.0 72 TOWER 10500 53.5 50.6 106 45.1 42.3 107 WEBBER SPRINGS 9200 21.3 26.7 80 28.5 29.9 95 WILLOW CREEK PASS 9540 9.5 13.5 70 9.5 15.0 63 ----- ----- Basin wide percent of average 92 97 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.2 28.9 87 24.7 23.2 106 CASPER MTN. 7900 11.9 18.1 66 15.0 18.2 82 DEADMAN HILL 10220 16.8 18.8 89 17.0 20.5 83 DEER PARK 9700 -M -M * 24.5 -M * LAPRELE CREEK 8320 6.5 7.2 90 12.7 14.3 89 RENO HILL 8400 11.9 13.9 86 13.7 22.0 62 ROACH 9700 16.3 18.1 90 19.5 25.2 77 SAND LAKE 10080 31.4 36.8 85 27.2 24.2 112 SOUTH PASS 9040 17.4 18.0 97 21.0 20.1 104 WINDY PEAK 7840 5.8 8.3 70 10.8 11.8 92 ----- ----- Basin wide percent of average 85 90 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 6.7 6.3 106 17.3 18.1 96 DIVIDE PEAK 8800 19.0 19.9 95 22.4 26.7 84 OLD BATTLE 10000 36.0 37.6 96 38.8 35.0 111 SANDSTONE RS 8150 10.5 11.2 94 21.5 22.4 96 WHISKEY PARK 8950 29.8 29.9 100 31.1 33.2 94 ----- ----- Basin wide percent of average 97 97 UPPER GREEN RIVER BIG SANDY OPENING 9100 13.4 14.3 94 13.9 18.2 76 BLIND BULL SUM 8650 24.8 24.8 100 20.9 26.6 79 EAST RIM DIVIDE 7930 13.1 14.9 88 13.4 17.1 78 ELKHART PARK G.S. 9400 12.9 14.2 91 15.3 17.9 85 GROS VENTRE SUMMIT 8775 12.2 14.4 85 14.9 17.9 83 KENDALL R.S. 7740 11.1 11.2 99 16.6 17.4 95 LOOMIS PARK 8240 -M 15.6 * 19.1 21.1 91 NEW FORK LAKE 8340 9.8 9.5 103 12.4 16.2 77 SNIDER BASIN 8250 13.3 13.6 98 14.0 17.0 82 SPRING CREEK DIVIDE 9000 24.6 29.6 83 24.2 30.4 80 TRIPLE PEAK 8500 19.9 25.5 78 24.2 34.6 70 ----- ----- Basin wide percent of average 90 81 LOWER GREEN RIVER HAMS FORK 7840 7.1 5.7 125 13.1 15.0 87 HEWINTA 9500 10.7 6.2 173 17.2 15.9 108 HICKERSON PARK 9150 13.2 3.8 347 15.3 11.9 129 HOLE-IN-ROCK 9150 8.9 3.3 270 13.2 11.9 111 INDIAN CREEK 9425 25.5 29.3 87 21.7 28.9 75 KELLEY R.S. 8180 14.6 15.7 93 18.3 21.0 87 STEEL CREEK PARK 10100 20.5 18.6 110 21.5 15.7 137 ----- ----- Basin wide percent of average 122 100 UPPER BEAR RIVER BUG LAKE 7950 20.2 17.0 119 23.5 22.2 106 HAYDEN FORK 9400 13.0 7.7 169 23.6 22.5 105 KELLEY R.S. 8180 14.6 15.7 93 18.3 21.0 87 LILY LAKE 9050 14.2 9.8 145 20.7 17.6 118 MONTE CRISTO 8960 30.4 27.0 113 29.5 29.7 99 SALT RIVER SUMMIT 7600 13.8 11.6 119 20.0 18.9 106 TRIAL LAKE 9960 25.3 24.5 103 26.4 27.7 95 ----- ----- Basin wide percent of average 116 102 ----------------------------------------------------------------------------- -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.