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 21 , 2000 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 9.0 14.0 64 20.5 24.4 84 COTTONWOOD CREEK 7600 19.7 22.1 89 23.2 27.4 85 GRANITE CREEK 6770 9.4 16.0 59 18.3 25.9 71 GRASSY LAKE 7265 27.0 36.3 74 32.1 40.6 79 GROS VENTRE SUMMIT 8775 11.3 15.2 74 11.6 17.5 66 LEWIS LAKE DIVIDE 7860 -M 35.9 * 29.4 41.3 71 PHILLIPS BENCH 8200 23.5 30.4 77 23.2 32.6 71 SALT RIVER SUMMIT 7600 10.1 12.7 80 15.2 18.6 82 SNAKE RIVER STATION 6920 8.8 17.8 49 20.8 28.5 73 SPRING CREEK DIVIDE 9000 23.1 29.5 78 22.6 29.9 76 THUMB DIVIDE 7980 10.9 16.5 66 16.1 22.8 71 TOGWOTEE PASS 9580 22.6 27.5 82 24.8 30.9 80 TWO OCEAN PLATEAU 9360 26.7 27.0 99 24.5 33.6 73 WILLOW CREEK 8450 27.4 31.8 86 31.2 35.1 89 ----- ----- Basin wide percent of average 77 77 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 21.9 25.7 85 20.6 20.2 102 BLACK BEAR 7950 -M 40.0 * 34.8 44.8 78 CANYON 7940 11.6 12.5 93 15.2 15.7 97 FISHER CREEK 9100 -M 38.2 * 33.0 40.5 81 MADISON PLATEAU 7750 17.2 24.9 69 22.6 28.8 78 NORTHEAST ENTRANCE 7350 6.0 7.8 77 13.2 13.2 100 PARKER PEAK 9400 18.3 23.4 78 -M 17.4 * SYLVAN LAKE 8420 18.6 23.9 78 22.7 21.3 107 THUMB DIVIDE 7980 10.9 16.5 66 16.1 22.8 71 TWO OCEAN PLATEAU 9360 26.7 27.0 99 24.5 33.6 73 WHISKEY CREEK 6800 12.2 17.1 71 17.4 24.0 72 WHITE MILL 8700 25.2 26.0 97 22.6 31.3 72 WOLVERINE 7650 5.8 10.4 56 11.4 14.4 79 ----- ----- Basin wide percent of average 81 82 WIND RIVER BURROUGHS CREEK 8750 12.9 14.4 90 15.0 18.5 81 COLD SPRINGS 9630 4.3 8.0 54 9.6 12.3 78 DEER PARK 9700 15.9 -M * 20.1 -M * HOBBS PARK 10100 12.0 17.1 70 11.9 16.3 73 LITTLE WARM 9620 10.8 12.3 88 13.6 15.3 89 SOUTH PASS 9040 14.9 17.8 84 17.1 19.4 88 ST. LAWRENCE ALT 8620 2.0 6.5 31 7.0 11.7 60 TOGWOTEE PASS 9580 22.6 27.5 82 24.8 30.9 80 TOWNSEND CREEK 8700 6.8 10.1 67 10.7 14.5 74 ----- ----- Basin wide percent of average 76 79 BIGHORN BASIN BALD MTN. 9375 21.6 23.0 94 20.2 19.7 103 BEAR TRAP MEADOW 7900 .2 5.9 3 7.1 9.8 72 BLACKWATER 9780 19.6 25.1 78 18.4 19.8 93 BONE SPRINGS DIV 9350 16.6 18.2 91 16.8 17.1 98 EVENING STAR 9200 23.0 29.8 77 26.1 24.8 105 GRAVE SPRINGS 8550 7.9 11.0 72 9.4 11.5 82 KIRWIN 9550 10.2 11.3 90 12.4 12.5 99 MARQUETTE 8760 7.8 8.7 90 8.3 12.2 68 MIDDLE POWDER 7760 11.9 14.1 84 9.7 13.8 70 OWL CREEK 8975 2.0 4.2 48 5.3 7.5 71 POWDER RIVER PASS 9480 7.7 11.2 69 12.1 13.6 89 SHELL CREEK 9580 15.0 16.5 91 14.0 15.0 93 SYLVAN LAKE 8420 18.6 23.9 78 22.7 21.3 107 SYLVAN ROAD 8120 9.5 9.7 98 16.0 17.8 90 TIMBER CREEK 7950 2.9 6.4 45 6.7 9.0 74 YOUNTS PEAK 8350 16.1 18.3 88 15.0 18.4 82 ----- ----- Basin wide percent of average 80 90 SHOSHONE RIVER BLACKWATER 9780 19.6 25.1 78 18.4 19.8 93 EVENING STAR 9200 23.0 29.8 77 26.1 24.8 105 KIRWIN 9550 10.2 11.3 90 12.4 12.5 99 MARQUETTE 8760 7.8 8.7 90 8.3 12.2 68 SYLVAN LAKE 8420 18.6 23.9 78 22.7 21.3 107 SYLVAN ROAD 8120 9.5 9.7 98 16.0 17.8 90 YOUNTS PEAK 8350 16.1 18.3 88 15.0 18.4 82 ----- ----- Basin wide percent of average 83 94 POWDER-TONGUE BEAR TRAP MEADOW 7900 .2 5.9 3 7.1 9.8 72 BIG GOOSE 7990 8.2 -M * 10.7 -M * BONE SPRINGS DIV 9350 16.6 18.2 91 16.8 17.1 98 BURGESS JUNCTION 7880 13.3 13.1 102 14.0 13.4 104 CLOUD PEAK RESERVOIR 9860 16.4 17.1 96 15.0 15.8 95 DOME LAKE 8880 11.3 14.9 76 14.7 15.3 96 GRAVE SPRINGS 8550 7.9 11.0 72 9.4 11.5 82 HANSEN SAWMILL 8760 3.4 7.3 47 8.6 9.5 91 MIDDLE POWDER 7760 11.9 14.1 84 9.7 13.8 70 POWDER RIVER PASS 9480 7.7 11.2 69 12.1 13.6 89 SUCKER CREEK 8880 13.2 13.5 98 17.0 15.4 110 TIE CREEK 6870 4.9 -M * 11.9 12.9 92 ----- ----- Basin wide percent of average 81 92 BELLE FOURCHE BLIND PARK 6890 4.4 10.8 41 11.2 12.5 90 NORTH RAPID CREEK 6130 6.9 -M * 10.5 -M * WARREN PEAK 6520 10.8 10.8 100 10.2 9.5 107 ----- ----- Basin wide percent of average 70 97 UPPER N. PLATTE RIVER COLUMBINE 9400 23.3 23.5 99 27.4 26.9 102 DIVIDE PEAK 8800 13.3 20.9 64 18.9 25.8 73 ELK RIVER 8700 13.6 18.8 72 18.7 21.1 89 JOE WRIGHT 10120 24.4 24.4 100 28.3 28.5 99 NORTH FRENCH CREEK 10100 27.4 28.6 96 26.1 26.5 98 OLD BATTLE 10000 27.7 36.7 75 31.9 33.9 94 SOUTH BRUSH CREEK 8400 8.5 12.1 70 13.8 19.2 72 TOWER 10500 45.8 49.8 92 43.5 40.9 106 WEBBER SPRINGS 9200 19.0 27.6 69 23.5 28.8 82 WILLOW CREEK PASS 9540 16.7 13.5 124 16.1 14.5 111 ----- ----- Basin wide percent of average 86 93 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.6 29.0 64 19.5 22.3 87 CASPER MTN. 7900 17.0 18.6 91 14.6 17.2 85 DEADMAN HILL 10220 17.6 18.3 96 17.7 19.6 90 DEER PARK 9700 15.9 -M * 20.1 -M * LAPRELE CREEK 8320 10.2 8.6 119 15.4 13.7 112 RENO HILL 8400 15.7 14.7 107 17.2 21.3 81 ROACH 9700 15.5 18.1 86 19.7 24.2 81 SAND LAKE 10080 25.2 36.3 69 22.9 23.3 98 SOUTH PASS 9040 14.9 17.8 84 17.1 19.4 88 WINDY PEAK 7840 8.4 8.8 95 13.6 11.3 120 ----- ----- Basin wide percent of average 84 92 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .8 8.6 9 14.0 17.4 80 DIVIDE PEAK 8800 13.3 20.9 64 18.9 25.8 73 OLD BATTLE 10000 27.7 36.7 75 31.9 33.9 94 SANDSTONE RS 8150 9.0 13.2 68 17.8 21.5 83 WHISKEY PARK 8950 24.8 30.3 82 28.0 32.1 87 ----- ----- Basin wide percent of average 69 85 UPPER GREEN RIVER BIG SANDY OPENING 9100 12.3 14.8 83 12.0 17.9 67 BLIND BULL SUM 8650 25.2 27.9 90 18.3 26.1 70 EAST RIM DIVIDE 7930 11.1 14.9 74 11.7 16.7 70 ELKHART PARK G.S. 9400 11.8 14.6 81 12.6 17.6 72 GROS VENTRE SUMMIT 8775 11.3 15.2 74 11.6 17.5 66 KENDALL R.S. 7740 9.3 12.2 76 14.7 17.0 86 LOOMIS PARK 8240 13.6 16.2 84 17.4 20.7 84 NEW FORK LAKE 8340 8.6 10.1 85 10.6 15.9 67 SNIDER BASIN 8250 10.8 14.6 74 11.7 16.6 70 SPRING CREEK DIVIDE 9000 23.1 29.5 78 22.6 29.9 76 TRIPLE PEAK 8500 18.5 26.2 71 24.1 33.9 71 ----- ----- Basin wide percent of average 79 73 LOWER GREEN RIVER HAMS FORK 7840 7.2 5.7 126 9.6 14.7 65 HEWINTA 9500 6.5 7.6 86 12.7 15.2 84 HICKERSON PARK 9150 4.8 5.2 92 9.0 11.4 79 HOLE-IN-ROCK 9150 3.4 4.7 72 8.5 11.4 75 INDIAN CREEK 9425 23.0 29.8 77 19.7 28.3 70 KELLEY R.S. 8180 12.3 16.6 74 15.8 20.6 77 STEEL CREEK PARK 10100 14.3 18.3 78 14.7 15.0 98 ----- ----- Basin wide percent of average 81 77 UPPER BEAR RIVER BUG LAKE 7950 13.2 18.5 71 14.4 21.6 67 HAYDEN FORK 9400 9.2 9.2 100 18.6 21.7 86 KELLEY R.S. 8180 12.3 16.6 74 15.8 20.6 77 LILY LAKE 9050 7.1 11.3 63 14.7 16.9 87 MONTE CRISTO 8960 17.9 28.1 64 21.0 28.8 73 SALT RIVER SUMMIT 7600 10.1 12.7 80 15.2 18.6 82 TRIAL LAKE 9960 21.0 25.2 83 22.6 26.9 84 ----- ----- Basin wide percent of average 75 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.