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 SATURDAY: MAY 9 , 1998 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 5.3 7.3 73 22.9 25.9 88 COTTONWOOD CREEK 7600 11.0 16.6 66 26.3 28.9 91 GRANITE CREEK 6770 7.9 9.7 81 22.4 27.6 81 GRASSY LAKE 7265 21.7 30.1 72 38.5 43.0 90 GROS VENTRE SUMMIT 8775 9.0 11.7 77 15.1 18.6 81 LEWIS LAKE DIVIDE 7860 23.4 31.7 74 35.3 43.8 81 PHILLIPS BENCH 8200 22.9 27.1 85 29.2 34.5 85 SALT RIVER SUMMIT 7600 5.1 4.6 111 21.3 19.8 108 SNAKE RIVER STATION 6920 -M 13.6 * -M 30.2 * SPRING CREEK DIVIDE 9000 19.8 27.5 72 24.8 31.6 78 THUMB DIVIDE 7980 -M 12.9 * -M 24.2 * TOGWOTEE PASS 9580 23.1 27.0 86 26.8 32.8 82 TWO OCEAN PLATEAU 9360 27.8 26.9 103 30.4 35.7 85 WILLOW CREEK 8450 17.8 29.6 60 35.4 37.2 95 ----- ----- Basin wide percent of average 78 87 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 16.9 25.4 67 18.3 22.2 82 BLACK BEAR 7950 34.9 38.2 91 39.9 47.6 84 CANYON 7940 4.9 8.4 58 16.3 17.0 96 FISHER CREEK 9100 27.7 38.0 73 30.9 43.4 71 MADISON PLATEAU 7750 16.0 21.0 76 25.7 30.8 83 NORTHEAST ENTRANCE 7350 .0 4.0 0 12.7 14.6 87 PARKER PEAK 9400 15.2 23.1 66 18.0 19.1 94 SYLVAN LAKE 8420 13.0 22.0 59 22.7 23.3 97 THUMB DIVIDE 7980 -M 12.9 * -M 24.2 * TWO OCEAN PLATEAU 9360 27.8 26.9 103 30.4 35.7 85 WHISKEY CREEK 6800 10.9 11.9 92 21.1 25.6 82 WHITE MILL 8700 20.4 25.5 80 23.1 33.6 69 WOLVERINE 7650 .0 5.2 0 -M 15.9 * ----- ----- Basin wide percent of average 75 83 WIND RIVER BURROUGHS CREEK 8750 12.9 9.5 136 19.6 20.2 97 COLD SPRINGS 9630 6.3 4.5 140 15.2 13.9 109 DEER PARK 9700 -M -M * 25.1 -M * HOBBS PARK 10100 19.1 17.4 110 19.2 18.2 105 LITTLE WARM 9620 6.6 7.5 88 16.0 17.1 94 SOUTH PASS 9040 13.8 17.2 80 21.7 21.5 101 ST. LAWRENCE ALT 8620 5.8 3.7 157 13.7 13.1 105 TOGWOTEE PASS 9580 23.1 27.0 86 26.8 32.8 82 TOWNSEND CREEK 8700 9.1 7.6 120 17.7 16.3 109 ----- ----- Basin wide percent of average 102 98 BIGHORN BASIN BALD MTN. 9375 19.5 24.3 80 20.4 22.0 93 BEAR TRAP MEADOW 7900 .0 2.6 0 11.7 11.5 102 BLACKWATER 9780 20.1 25.2 80 20.5 21.5 95 BONE SPRINGS DIV 9350 16.8 17.4 97 19.8 19.2 103 EVENING STAR 9200 19.1 30.5 63 27.2 26.9 101 GRAVE SPRINGS 8550 8.9 -M * 14.3 13.4 107 KIRWIN 9550 10.8 10.8 100 16.4 14.0 117 MARQUETTE 8760 10.9 8.0 136 16.5 14.5 114 MIDDLE POWDER 7760 9.1 14.3 64 13.5 15.7 86 OWL CREEK 8975 1.8 2.0 90 9.8 8.8 111 POWDER RIVER PASS 9480 9.6 8.0 120 16.5 15.6 106 SHELL CREEK 9580 13.2 17.0 78 13.8 16.9 82 SYLVAN LAKE 8420 13.0 22.0 59 22.7 23.3 97 SYLVAN ROAD 8120 .1 5.7 2 15.2 19.4 78 TIMBER CREEK 7950 3.9 4.0 98 12.7 11.0 115 YOUNTS PEAK 8350 13.7 16.9 81 17.0 20.1 85 ----- ----- Basin wide percent of average 77 98 SHOSHONE RIVER BLACKWATER 9780 20.1 25.2 80 20.5 21.5 95 EVENING STAR 9200 19.1 30.5 63 27.2 26.9 101 KIRWIN 9550 10.8 10.8 100 16.4 14.0 117 MARQUETTE 8760 10.9 8.0 136 16.5 14.5 114 SYLVAN LAKE 8420 13.0 22.0 59 22.7 23.3 97 SYLVAN ROAD 8120 .1 5.7 2 15.2 19.4 78 YOUNTS PEAK 8350 13.7 16.9 81 17.0 20.1 85 ----- ----- Basin wide percent of average 74 97 POWDER-TONGUE BEAR TRAP MEADOW 7900 .0 2.6 0 11.7 11.5 102 BONE SPRINGS DIV 9350 16.8 17.4 97 19.8 19.2 103 BURGESS JUNCTION 7880 9.8 12.1 81 15.2 15.3 99 CLOUD PEAK RESERVOIR 9860 15.6 16.8 93 20.0 18.2 110 DOME LAKE 8880 -M 12.3 * 16.6 17.4 95 GRAVE SPRINGS 8550 8.9 -M * 14.3 13.4 107 HANSEN SAWMILL 8760 3.3 5.2 63 13.9 11.0 126 MIDDLE POWDER 7760 9.1 14.3 64 13.5 15.7 86 POWDER RIVER PASS 9480 9.6 8.0 120 16.5 15.6 106 SUCKER CREEK 8880 9.2 11.9 77 17.0 17.5 97 TIE CREEK 6870 .2 -M * 16.3 14.6 112 ----- ----- Basin wide percent of average 83 103 BELLE FOURCHE BLIND PARK 6890 -M 6.7 * 14.4 14.9 97 NORTH RAPID CREEK 6130 .1 -M * 12.0 -M * WARREN PEAK 6520 -M 6.7 * -M 11.1 * ----- ----- Basin wide percent of average * 97* UPPER N. PLATTE RIVER COLUMBINE 9400 7.9 17.5 45 26.1 28.8 91 DIVIDE PEAK 8800 13.8 15.4 90 23.4 28.2 83 ELK RIVER 8700 7.8 11.8 66 22.8 22.7 100 JOE WRIGHT 10120 22.1 24.1 92 29.0 31.5 92 NORTH FRENCH CREEK 10100 32.0 27.9 115 34.3 29.1 118 OLD BATTLE 10000 35.4 37.5 94 39.9 36.7 109 SOUTH BRUSH CREEK 8400 1.5 7.9 19 15.3 21.3 72 TOWER 10500 53.3 50.9 105 46.7 44.8 104 WEBBER SPRINGS 9200 16.6 22.9 72 29.3 31.4 93 WILLOW CREEK PASS 9540 9.4 11.9 79 10.1 16.1 63 ----- ----- Basin wide percent of average 88 95 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.4 26.6 84 26.5 24.7 107 CASPER MTN. 7900 4.8 14.0 34 15.1 19.9 76 DEADMAN HILL 10220 17.2 18.8 91 18.7 22.0 85 DEER PARK 9700 -M -M * 25.1 -M * LAPRELE CREEK 8320 .0 4.6 0 12.7 15.6 81 RENO HILL 8400 4.0 10.7 37 13.6 22.9 59 ROACH 9700 14.1 16.9 83 21.1 26.9 78 SAND LAKE 10080 30.8 36.2 85 28.7 25.7 112 SOUTH PASS 9040 13.8 17.2 80 21.7 21.5 101 WINDY PEAK 7840 .0 5.4 0 10.8 13.1 82 ----- ----- Basin wide percent of average 71 88 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 2.1 0 17.7 19.1 93 DIVIDE PEAK 8800 13.8 15.4 90 23.4 28.2 83 OLD BATTLE 10000 35.4 37.5 94 39.9 36.7 109 SANDSTONE RS 8150 2.8 5.5 51 22.2 23.8 93 WHISKEY PARK 8950 28.5 27.1 105 33.3 35.1 95 ----- ----- Basin wide percent of average 92 96 UPPER GREEN RIVER BIG SANDY OPENING 9100 8.8 11.6 76 14.6 19.0 77 BLIND BULL SUM 8650 22.0 22.5 98 21.1 27.6 76 EAST RIM DIVIDE 7930 9.0 13.6 66 13.5 17.8 76 ELKHART PARK G.S. 9400 8.1 11.6 70 15.7 18.7 84 GROS VENTRE SUMMIT 8775 9.0 11.7 77 15.1 18.6 81 KENDALL R.S. 7740 3.9 4.5 87 17.1 18.1 94 LOOMIS PARK 8240 -M 12.9 * 19.7 22.0 90 NEW FORK LAKE 8340 2.7 7.4 36 13.4 16.9 79 SNIDER BASIN 8250 8.4 10.4 81 14.9 17.7 84 SPRING CREEK DIVIDE 9000 19.8 27.5 72 24.8 31.6 78 TRIPLE PEAK 8500 13.0 22.8 57 24.8 36.0 69 ----- ----- Basin wide percent of average 73 80 LOWER GREEN RIVER HAMS FORK 7840 .3 2.4 12 13.3 15.6 85 HEWINTA 9500 5.9 2.3 257 18.2 17.0 107 HICKERSON PARK 9150 8.0 1.6 500 16.8 13.0 129 HOLE-IN-ROCK 9150 4.3 1.3 331 14.3 13.0 110 INDIAN CREEK 9425 21.1 26.6 79 22.4 30.0 75 KELLEY R.S. 8180 7.6 12.1 63 18.6 21.9 85 STEEL CREEK PARK 10100 21.6 17.6 123 22.2 17.1 130 ----- ----- Basin wide percent of average 108 99 UPPER BEAR RIVER BUG LAKE 7950 14.0 12.6 111 24.0 23.2 103 HAYDEN FORK 9400 7.4 3.2 231 24.9 23.8 105 KELLEY R.S. 8180 7.6 12.1 63 18.6 21.9 85 LILY LAKE 9050 8.8 7.0 126 21.7 18.8 115 MONTE CRISTO 8960 23.7 23.7 100 30.2 31.2 97 SALT RIVER SUMMIT 7600 5.1 4.6 111 21.3 19.8 108 TRIAL LAKE 9960 20.6 22.3 92 27.4 29.2 94 ----- ----- Basin wide percent of average 102 100 ----------------------------------------------------------------------------- -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.