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 THURSDAY: APRIL 12 , 2001 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 8.0 16.4 49 13.6 23.7 57 COTTONWOOD CREEK 7600 17.6 23.6 75 17.1 26.6 64 GRANITE CREEK 6770 11.2 18.0 62 15.6 25.0 62 GRASSY LAKE 7265 22.5 37.5 60 25.5 39.5 65 GROS VENTRE SUMMIT 8775 -M 16.0 * -M 17.0 * LEWIS LAKE DIVIDE 7860 18.1 36.6 49 21.0 40.1 52 PHILLIPS BENCH 8200 18.3 30.6 60 -M 31.7 * SALT RIVER SUMMIT 7600 8.9 14.0 64 13.3 18.0 74 SNAKE RIVER STATION 6920 10.8 18.6 58 16.3 27.7 59 SPRING CREEK DIVIDE 9000 19.4 29.2 66 18.7 29.1 64 THUMB DIVIDE 7980 8.7 17.4 50 11.8 22.1 53 TOGWOTEE PASS 9580 18.3 26.6 69 18.5 30.1 61 TWO OCEAN PLATEAU 9360 21.1 26.6 79 18.8 32.6 58 WILLOW CREEK 8450 20.1 31.4 64 26.4 34.1 77 ----- ----- Basin wide percent of average 62 62 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 13.8 25.1 55 12.8 19.3 66 BLACK BEAR 7950 25.1 39.8 63 24.9 43.2 58 CANYON 7940 9.6 13.4 72 12.2 15.1 81 FISHER CREEK 9100 21.4 37.5 57 22.0 39.0 56 MADISON PLATEAU 7750 13.9 25.4 55 16.7 27.9 60 NORTHEAST ENTRANCE 7350 5.4 9.0 60 8.4 12.6 67 PARKER PEAK 9400 15.8 22.9 69 14.1 16.6 85 SYLVAN LAKE 8420 16.3 23.6 69 19.5 20.4 96 THUMB DIVIDE 7980 8.7 17.4 50 11.8 22.1 53 TWO OCEAN PLATEAU 9360 21.1 26.6 79 18.8 32.6 58 WHISKEY CREEK 6800 6.8 18.1 38 14.4 23.2 62 WHITE MILL 8700 15.5 25.7 60 14.9 30.1 50 WOLVERINE 7650 7.7 11.8 65 8.4 13.7 61 ----- ----- Basin wide percent of average 61 63 WIND RIVER BURROUGHS CREEK 8750 -M 15.2 * -M 17.7 * COLD SPRINGS 9630 4.1 8.6 48 6.1 11.5 53 DEER PARK 9700 13.5 -M * 14.7 -M * HOBBS PARK 10100 8.1 16.2 50 7.6 15.3 50 LITTLE WARM 9620 8.4 13.1 64 8.9 14.4 62 SOUTH PASS 9040 11.6 17.3 67 10.7 18.4 58 ST. LAWRENCE ALT 8620 3.5 7.2 49 4.7 11.0 43 TOGWOTEE PASS 9580 18.3 26.6 69 18.5 30.1 61 TOWNSEND CREEK 8700 5.6 10.3 54 6.9 13.6 51 ----- ----- Basin wide percent of average 60 55 BIGHORN BASIN BALD MTN. 9375 17.3 21.9 79 15.6 18.6 84 BEAR TRAP MEADOW 7900 5.3 7.0 76 6.8 9.1 75 BLACKWATER 9780 16.6 24.2 69 15.6 19.0 82 BONE SPRINGS DIV 9350 13.4 17.8 75 13.6 16.2 84 EVENING STAR 9200 17.2 28.8 60 21.0 23.9 88 GRAVE SPRINGS 8550 7.2 10.4 69 7.4 10.6 70 KIRWIN 9550 6.6 10.9 61 7.5 11.7 64 MARQUETTE 8760 5.2 8.6 60 6.1 11.0 55 MIDDLE POWDER 7760 9.0 13.3 68 7.8 12.9 60 OWL CREEK 8975 4.3 4.7 91 4.5 6.9 65 POWDER RIVER PASS 9480 8.1 11.4 71 10.4 12.7 82 SHELL CREEK 9580 13.5 15.9 85 12.7 14.1 90 SYLVAN LAKE 8420 16.3 23.6 69 19.5 20.4 96 SYLVAN ROAD 8120 9.8 11.2 88 14.4 17.1 84 TIMBER CREEK 7950 4.3 6.5 66 5.5 8.1 68 YOUNTS PEAK 8350 9.5 18.1 52 10.5 17.7 59 ----- ----- Basin wide percent of average 70 78 SHOSHONE RIVER BLACKWATER 9780 16.6 24.2 69 15.6 19.0 82 EVENING STAR 9200 17.2 28.8 60 21.0 23.9 88 KIRWIN 9550 6.6 10.9 61 7.5 11.7 64 MARQUETTE 8760 5.2 8.6 60 6.1 11.0 55 SYLVAN LAKE 8420 16.3 23.6 69 19.5 20.4 96 SYLVAN ROAD 8120 9.8 11.2 88 14.4 17.1 84 YOUNTS PEAK 8350 9.5 18.1 52 10.5 17.7 59 ----- ----- Basin wide percent of average 65 78 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.3 7.0 76 6.8 9.1 75 BIG GOOSE 7990 7.2 -M * 8.2 -M * BONE SPRINGS DIV 9350 13.4 17.8 75 13.6 16.2 84 BURGESS JUNCTION 7880 9.5 12.7 75 9.3 12.6 74 CLOUD PEAK RESERVOIR 9860 11.2 16.4 68 10.4 14.7 71 DOME LAKE 8880 11.3 14.6 77 10.3 14.4 72 GRAVE SPRINGS 8550 7.2 10.4 69 7.4 10.6 70 HANSEN SAWMILL 8760 6.1 7.5 81 7.1 8.8 81 MIDDLE POWDER 7760 9.0 13.3 68 7.8 12.9 60 POWDER RIVER PASS 9480 8.1 11.4 71 10.4 12.7 82 SUCKER CREEK 8880 9.1 13.1 69 10.5 14.3 73 TIE CREEK 6870 6.1 -M * 8.8 12.0 73 ----- ----- Basin wide percent of average 73 74 BELLE FOURCHE BLIND PARK 6890 7.8 11.5 68 12.2 11.4 107 COLE CANYON 5910 4.6 5.9 78 11.4 8.8 130 NORTH RAPID CREEK 6130 6.5 -M * 9.9 -M * ----- ----- Basin wide percent of average 71 117 UPPER N. PLATTE RIVER COLUMBINE 9400 20.2 24.5 82 22.6 25.8 88 DIVIDE PEAK 8800 17.8 21.7 82 20.4 24.4 84 ELK RIVER 8700 16.5 20.3 81 17.9 20.3 88 JOE WRIGHT 10120 -M 23.8 * -M 26.9 * NORTH FRENCH CREEK 10100 30.8 27.6 112 24.0 25.1 96 OLD BATTLE 10000 28.6 35.0 82 29.7 32.2 92 SOUTH BRUSH CREEK 8400 10.0 13.1 76 -M 17.9 * TOWER 10500 37.9 48.2 79 36.0 38.8 93 WEBBER SPRINGS 9200 19.5 28.5 68 21.6 27.2 79 WILLOW CREEK PASS 9540 13.0 13.2 98 13.7 13.6 101 ----- ----- Basin wide percent of average 84 90 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 20.5 28.4 72 19.2 21.0 91 CASPER MTN. 7900 13.5 18.5 73 12.1 15.8 77 DEADMAN HILL 10220 15.2 17.5 87 13.9 18.3 76 DEER PARK 9700 13.5 -M * 14.7 -M * LAPRELE CREEK 8320 10.1 10.1 100 11.0 12.9 85 RENO HILL 8400 15.3 15.3 100 13.6 20.4 67 ROACH 9700 14.4 17.9 80 16.6 22.8 73 SAND LAKE 10080 29.6 35.1 84 24.4 21.9 111 SOUTH PASS 9040 11.6 17.3 67 10.7 18.4 58 WINDY PEAK 7840 7.9 9.2 86 10.1 10.5 96 ----- ----- Basin wide percent of average 82 81 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 8.7 11.0 79 14.7 16.5 89 DIVIDE PEAK 8800 17.8 21.7 82 20.4 24.4 84 OLD BATTLE 10000 28.6 35.0 82 29.7 32.2 92 SANDSTONE RS 8150 12.5 15.2 82 17.6 20.2 87 WHISKEY PARK 8950 24.6 30.3 81 23.9 30.3 79 ----- ----- Basin wide percent of average 81 86 UPPER GREEN RIVER BIG SANDY OPENING 9100 12.4 15.2 82 11.6 17.3 67 BLIND BULL SUM 8650 17.0 30.7 55 14.0 25.4 55 EAST RIM DIVIDE 7930 11.0 14.8 74 9.7 16.2 60 ELKHART PARK G.S. 9400 12.8 14.8 86 12.5 17.0 74 GROS VENTRE SUMMIT 8775 -M 16.0 * -M 17.0 * KENDALL R.S. 7740 8.7 13.4 65 10.4 16.5 63 LOOMIS PARK 8240 12.3 17.1 72 13.5 20.1 67 NEW FORK LAKE 8340 9.8 10.8 91 9.6 15.4 62 SNIDER BASIN 8250 9.7 15.4 63 11.1 16.1 69 SPRING CREEK DIVIDE 9000 19.4 29.2 66 18.7 29.1 64 TRIPLE PEAK 8500 17.1 26.7 64 19.4 32.9 59 ----- ----- Basin wide percent of average 69 63 LOWER GREEN RIVER HAMS FORK 7840 8.5 7.1 120 9.0 14.2 63 HEWINTA 9500 9.8 9.5 103 12.8 14.3 90 HICKERSON PARK 9150 9.8 6.7 146 11.9 10.5 113 HOLE-IN-ROCK 9150 8.1 6.3 129 10.9 10.5 104 INDIAN CREEK 9425 19.4 30.1 64 16.4 27.6 59 KELLEY R.S. 8180 11.9 17.5 68 14.0 20.0 70 STEEL CREEK PARK 10100 14.4 17.6 82 14.5 14.0 104 ----- ----- Basin wide percent of average 86 81 UPPER BEAR RIVER BUG LAKE 7950 13.5 20.3 67 14.2 20.7 69 HAYDEN FORK 9400 11.6 12.0 97 18.2 20.5 89 KELLEY R.S. 8180 11.9 17.5 68 14.0 20.0 70 LILY LAKE 9050 11.5 13.0 88 14.4 16.0 90 MONTE CRISTO 8960 21.1 29.4 72 21.2 27.4 77 SALT RIVER SUMMIT 7600 8.9 14.0 64 13.3 18.0 74 TRIAL LAKE 9960 17.7 25.8 69 19.9 25.6 78 ----- ----- Basin wide percent of average 73 78 ----------------------------------------------------------------------------- -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.