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 7 , 2000 ----------------------------------------------------------------------------- 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 17.0 91 19.5 23.3 84 COTTONWOOD CREEK 7600 21.8 24.0 91 22.6 26.2 86 GRANITE CREEK 6770 13.4 18.4 73 17.3 24.6 70 GRASSY LAKE 7265 31.3 36.9 85 30.7 38.9 79 GROS VENTRE SUMMIT 8775 11.8 15.9 74 10.4 16.7 62 LEWIS LAKE DIVIDE 7860 -M 36.2 * 28.2 39.5 71 PHILLIPS BENCH 8200 23.2 30.0 77 22.6 31.2 72 SALT RIVER SUMMIT 7600 12.8 14.2 90 14.1 17.7 80 SNAKE RIVER STATION 6920 15.5 18.7 83 20.1 27.2 74 SPRING CREEK DIVIDE 9000 22.6 28.8 78 21.7 28.6 76 THUMB DIVIDE 7980 -M 17.3 * -M 21.8 * TOGWOTEE PASS 9580 22.0 26.0 85 23.0 29.6 78 TWO OCEAN PLATEAU 9360 26.1 26.7 98 23.0 32.1 72 WILLOW CREEK 8450 28.7 31.0 93 28.2 33.6 84 ----- ----- Basin wide percent of average 85 76 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 21.7 24.5 89 19.9 18.8 106 BLACK BEAR 7950 -M 39.2 * 33.8 42.3 80 CANYON 7940 13.2 13.3 99 14.6 14.8 99 FISHER CREEK 9100 32.9 36.9 89 31.1 38.1 82 MADISON PLATEAU 7750 19.6 25.1 78 22.0 27.3 81 NORTHEAST ENTRANCE 7350 10.4 9.1 114 12.8 12.3 104 PARKER PEAK 9400 18.5 22.4 83 -M 16.2 * SYLVAN LAKE 8420 19.3 23.0 84 21.4 19.9 108 THUMB DIVIDE 7980 -M 17.3 * -M 21.8 * TWO OCEAN PLATEAU 9360 26.1 26.7 98 23.0 32.1 72 WHISKEY CREEK 6800 14.7 17.8 83 16.9 22.7 74 WHITE MILL 8700 24.7 25.4 97 21.7 29.5 74 WOLVERINE 7650 10.9 11.7 93 11.2 13.3 84 ----- ----- Basin wide percent of average 90 84 WIND RIVER BURROUGHS CREEK 8750 13.0 15.1 86 13.9 17.2 81 COLD SPRINGS 9630 6.1 8.5 72 8.4 11.1 76 DEER PARK 9700 13.9 -M * 16.9 -M * HOBBS PARK 10100 11.2 15.7 71 10.0 14.8 68 LITTLE WARM 9620 10.5 12.4 85 12.1 13.9 87 SOUTH PASS 9040 14.3 16.9 85 14.6 17.8 82 ST. LAWRENCE ALT 8620 4.4 7.4 59 6.1 10.7 57 TOGWOTEE PASS 9580 22.0 26.0 85 23.0 29.6 78 TOWNSEND CREEK 8700 6.6 10.1 65 8.2 13.1 63 ----- ----- Basin wide percent of average 79 75 BIGHORN BASIN BALD MTN. 9375 21.1 21.3 99 19.5 18.1 108 BEAR TRAP MEADOW 7900 5.1 7.1 72 6.4 8.7 74 BLACKWATER 9780 18.0 23.4 77 17.1 18.6 92 BONE SPRINGS DIV 9350 -M 17.2 * 15.7 15.7 100 EVENING STAR 9200 23.8 28.1 85 25.3 23.3 109 GRAVE SPRINGS 8550 8.1 10.0 81 8.1 10.2 79 KIRWIN 9550 9.1 10.5 87 11.0 11.3 97 MARQUETTE 8760 7.1 8.4 85 7.0 10.3 68 MIDDLE POWDER 7760 12.5 12.8 98 9.0 12.4 73 OWL CREEK 8975 4.3 4.6 93 4.8 6.6 73 POWDER RIVER PASS 9480 9.6 11.2 86 11.5 12.1 95 SHELL CREEK 9580 15.3 15.5 99 13.6 13.7 99 SYLVAN LAKE 8420 19.3 23.0 84 21.4 19.9 108 SYLVAN ROAD 8120 13.0 11.8 110 15.5 16.7 93 TIMBER CREEK 7950 3.4 6.4 53 5.3 7.6 70 YOUNTS PEAK 8350 15.7 17.7 89 13.6 17.2 79 ----- ----- Basin wide percent of average 88 92 SHOSHONE RIVER BLACKWATER 9780 18.0 23.4 77 17.1 18.6 92 EVENING STAR 9200 23.8 28.1 85 25.3 23.3 109 KIRWIN 9550 9.1 10.5 87 11.0 11.3 97 MARQUETTE 8760 7.1 8.4 85 7.0 10.3 68 SYLVAN LAKE 8420 19.3 23.0 84 21.4 19.9 108 SYLVAN ROAD 8120 13.0 11.8 110 15.5 16.7 93 YOUNTS PEAK 8350 15.7 17.7 89 13.6 17.2 79 ----- ----- Basin wide percent of average 86 95 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.1 7.1 72 6.4 8.7 74 BIG GOOSE 7990 8.6 -M * 9.8 -M * BONE SPRINGS DIV 9350 -M 17.2 * 15.7 15.7 100 BURGESS JUNCTION 7880 13.2 12.3 107 13.2 12.1 109 CLOUD PEAK RESERVOIR 9860 15.6 15.7 99 13.3 14.1 94 DOME LAKE 8880 11.6 14.2 82 13.4 13.8 97 GRAVE SPRINGS 8550 8.1 10.0 81 8.1 10.2 79 HANSEN SAWMILL 8760 5.7 7.3 78 7.3 8.4 87 MIDDLE POWDER 7760 12.5 12.8 98 9.0 12.4 73 POWDER RIVER PASS 9480 9.6 11.2 86 11.5 12.1 95 SUCKER CREEK 8880 13.3 12.7 105 16.0 13.8 116 TIE CREEK 6870 6.7 -M * 10.4 11.6 90 ----- ----- Basin wide percent of average 92 94 BELLE FOURCHE BLIND PARK 6890 6.3 11.3 56 8.1 10.8 75 NORTH RAPID CREEK 6130 7.0 -M * 7.0 -M * WARREN PEAK 6520 12.3 11.3 109 9.1 8.5 107 ----- ----- Basin wide percent of average 82 89 UPPER N. PLATTE RIVER COLUMBINE 9400 29.9 24.7 121 26.4 25.2 105 DIVIDE PEAK 8800 15.9 21.5 74 17.9 23.7 76 ELK RIVER 8700 18.5 20.2 92 17.6 19.8 89 JOE WRIGHT 10120 -M 23.0 * -M 26.1 * NORTH FRENCH CREEK 10100 25.6 26.7 96 23.4 24.4 96 OLD BATTLE 10000 26.3 33.7 78 29.7 31.3 95 SOUTH BRUSH CREEK 8400 10.2 13.2 77 11.9 17.2 69 TOWER 10500 46.8 46.9 100 40.8 37.6 109 WEBBER SPRINGS 9200 19.5 28.4 69 22.1 26.3 84 WILLOW CREEK PASS 9540 15.0 12.6 119 15.4 13.2 117 ----- ----- Basin wide percent of average 91 94 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.5 27.5 67 18.3 20.3 90 CASPER MTN. 7900 15.9 17.6 90 12.2 15.0 81 DEADMAN HILL 10220 14.2 17.1 83 16.0 17.6 91 DEER PARK 9700 13.9 -M * 16.9 -M * LAPRELE CREEK 8320 9.8 10.3 95 12.1 12.4 98 RENO HILL 8400 13.8 14.9 93 13.4 19.8 68 ROACH 9700 15.5 17.7 88 17.8 22.0 81 SAND LAKE 10080 24.1 34.2 70 20.7 21.2 98 SOUTH PASS 9040 14.3 16.9 85 14.6 17.8 82 WINDY PEAK 7840 7.9 9.0 88 10.6 10.0 106 ----- ----- Basin wide percent of average 81 87 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 8.2 11.1 74 12.8 15.9 81 DIVIDE PEAK 8800 15.9 21.5 74 17.9 23.7 76 OLD BATTLE 10000 26.3 33.7 78 29.7 31.3 95 SANDSTONE RS 8150 13.2 15.1 87 16.3 19.5 84 WHISKEY PARK 8950 23.7 29.7 80 26.4 29.4 90 ----- ----- Basin wide percent of average 79 86 UPPER GREEN RIVER BIG SANDY OPENING 9100 -M 15.0 * -M 17.0 * BLIND BULL SUM 8650 24.9 30.3 82 17.7 25.1 71 EAST RIM DIVIDE 7930 11.9 14.4 83 11.1 15.9 70 ELKHART PARK G.S. 9400 12.0 14.4 83 11.9 16.7 71 GROS VENTRE SUMMIT 8775 11.8 15.9 74 10.4 16.7 62 KENDALL R.S. 7740 13.8 14.0 99 14.1 16.2 87 LOOMIS PARK 8240 17.2 17.3 99 17.1 19.7 87 NEW FORK LAKE 8340 10.8 11.0 98 9.9 15.1 66 SNIDER BASIN 8250 12.4 15.2 82 11.5 15.8 73 SPRING CREEK DIVIDE 9000 22.6 28.8 78 21.7 28.6 76 TRIPLE PEAK 8500 21.9 26.3 83 23.3 32.4 72 ----- ----- Basin wide percent of average 85 74 LOWER GREEN RIVER HAMS FORK 7840 10.7 9.5 113 8.7 14.0 62 HEWINTA 9500 10.7 10.4 103 12.1 13.7 88 HICKERSON PARK 9150 6.8 6.8 100 7.9 10.1 78 HOLE-IN-ROCK 9150 6.1 6.4 95 7.9 10.1 78 INDIAN CREEK 9425 22.9 29.6 77 18.8 27.1 69 KELLEY R.S. 8180 13.9 17.4 80 14.6 19.6 74 STEEL CREEK PARK 10100 13.3 17.2 77 13.7 13.5 101 ----- ----- Basin wide percent of average 87 77 UPPER BEAR RIVER BUG LAKE 7950 15.9 20.7 77 13.4 20.2 66 HAYDEN FORK 9400 11.9 14.1 84 17.3 19.9 87 KELLEY R.S. 8180 13.9 17.4 80 14.6 19.6 74 LILY LAKE 9050 9.8 13.2 74 13.4 15.4 87 MONTE CRISTO 8960 20.2 29.6 68 19.5 26.6 73 SALT RIVER SUMMIT 7600 12.8 14.2 90 14.1 17.7 80 TRIAL LAKE 9960 20.0 25.4 79 21.2 24.9 85 ----- ----- Basin wide percent of average 78 79 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Average Snow Water Equivalent and Total Precipitation values 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.