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 SUNDAY: APRIL 1 , 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 17.8 45 12.1 22.8 53 COTTONWOOD CREEK 7600 15.6 24.5 64 18.8 25.7 73 GRANITE CREEK 6770 10.9 18.8 58 14.3 24.0 60 GRASSY LAKE 7265 20.5 36.3 56 23.4 38.1 61 GROS VENTRE SUMMIT 8775 9.5 15.8 60 8.6 16.3 53 LEWIS LAKE DIVIDE 7860 16.8 35.7 47 18.9 38.7 49 PHILLIPS BENCH 8200 16.3 29.4 55 -M 30.6 * SALT RIVER SUMMIT 7600 7.6 14.5 52 11.6 17.3 67 SNAKE RIVER STATION 6920 10.2 18.8 54 14.7 26.7 55 SPRING CREEK DIVIDE 9000 16.8 28.3 59 16.9 28.1 60 THUMB DIVIDE 7980 7.5 17.2 44 10.4 21.3 49 TOGWOTEE PASS 9580 16.6 25.2 66 16.9 29.0 58 TWO OCEAN PLATEAU 9360 19.1 26.8 71 16.9 31.4 54 WILLOW CREEK 8450 18.4 30.5 60 23.8 32.9 72 ----- ----- Basin wide percent of average 57 59 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 11.9 23.8 50 11.2 18.2 62 BLACK BEAR 7950 23.0 38.5 60 23.3 41.3 56 CANYON 7940 8.8 13.1 67 11.3 14.4 78 FISHER CREEK 9100 18.8 36.1 52 19.7 37.1 53 MADISON PLATEAU 7750 13.0 24.8 52 15.6 26.7 58 NORTHEAST ENTRANCE 7350 4.4 9.2 48 7.5 11.9 63 PARKER PEAK 9400 13.9 21.8 64 12.7 15.7 81 SYLVAN LAKE 8420 14.3 22.3 64 17.4 19.3 90 THUMB DIVIDE 7980 7.5 17.2 44 10.4 21.3 49 TWO OCEAN PLATEAU 9360 19.1 26.8 71 16.9 31.4 54 WHISKEY CREEK 6800 -M 17.5 * -M 22.2 * WHITE MILL 8700 13.2 25.1 53 13.0 28.7 45 WOLVERINE 7650 6.7 11.7 57 7.6 12.8 59 ----- ----- Basin wide percent of average 57 60 WIND RIVER BURROUGHS CREEK 8750 -M 15.0 * 9.5 16.7 57 COLD SPRINGS 9630 3.1 8.4 37 4.8 10.6 45 DEER PARK 9700 10.4 -M * 11.5 -M * HOBBS PARK 10100 6.4 15.1 42 6.2 14.2 44 LITTLE WARM 9620 7.6 11.6 66 7.7 13.3 58 SOUTH PASS 9040 9.1 16.4 55 8.5 17.1 50 ST. LAWRENCE ALT 8620 3.2 7.6 42 3.9 10.2 38 TOGWOTEE PASS 9580 16.6 25.2 66 16.9 29.0 58 TOWNSEND CREEK 8700 4.9 9.9 49 6.2 12.5 50 ----- ----- Basin wide percent of average 54 52 BIGHORN BASIN BALD MTN. 9375 14.1 20.5 69 12.8 17.4 74 BEAR TRAP MEADOW 7900 5.4 7.2 75 5.9 8.2 72 BLACKWATER 9780 14.6 22.4 65 13.6 18.1 75 BONE SPRINGS DIV 9350 10.6 16.5 64 10.9 15.1 72 EVENING STAR 9200 14.7 27.2 54 18.5 22.7 81 GRAVE SPRINGS 8550 6.2 9.6 65 6.4 9.6 67 KIRWIN 9550 5.5 10.0 55 6.4 10.8 59 MARQUETTE 8760 4.5 8.1 56 5.7 9.5 60 MIDDLE POWDER 7760 8.6 12.2 70 7.3 11.8 62 OWL CREEK 8975 3.5 4.6 76 3.6 6.2 58 POWDER RIVER PASS 9480 6.6 10.9 61 8.4 11.5 73 SHELL CREEK 9580 10.8 15.0 72 10.3 13.1 79 SYLVAN LAKE 8420 14.3 22.3 64 17.4 19.3 90 SYLVAN ROAD 8120 8.3 12.5 66 12.9 16.2 80 TIMBER CREEK 7950 3.1 6.3 49 4.3 7.0 61 YOUNTS PEAK 8350 8.4 17.3 49 9.4 16.7 56 ----- ----- Basin wide percent of average 63 72 SHOSHONE RIVER BLACKWATER 9780 14.6 22.4 65 13.6 18.1 75 EVENING STAR 9200 14.7 27.2 54 18.5 22.7 81 KIRWIN 9550 5.5 10.0 55 6.4 10.8 59 MARQUETTE 8760 4.5 8.1 56 5.7 9.5 60 SYLVAN LAKE 8420 14.3 22.3 64 17.4 19.3 90 SYLVAN ROAD 8120 8.3 12.5 66 12.9 16.2 80 YOUNTS PEAK 8350 8.4 17.3 49 9.4 16.7 56 ----- ----- Basin wide percent of average 59 74 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.4 7.2 75 5.9 8.2 72 BIG GOOSE 7990 5.8 -M * 7.0 -M * BONE SPRINGS DIV 9350 10.6 16.5 64 10.9 15.1 72 BURGESS JUNCTION 7880 8.4 11.8 71 8.3 11.5 72 CLOUD PEAK RESERVOIR 9860 9.9 14.9 66 9.2 13.3 69 DOME LAKE 8880 9.4 13.8 68 8.5 13.2 64 GRAVE SPRINGS 8550 6.2 9.6 65 6.4 9.6 67 HANSEN SAWMILL 8760 5.0 7.1 70 5.9 7.9 75 MIDDLE POWDER 7760 8.6 12.2 70 7.3 11.8 62 POWDER RIVER PASS 9480 6.6 10.9 61 8.4 11.5 73 SUCKER CREEK 8880 8.1 12.2 66 9.5 13.1 73 TIE CREEK 6870 4.9 -M * 7.5 11.0 68 ----- ----- Basin wide percent of average 67 70 BELLE FOURCHE BLIND PARK 6890 7.7 11.1 69 10.8 10.0 108 COLE CANYON 5910 6.3 6.2 102 9.8 8.0 123 NORTH RAPID CREEK 6130 7.6 -M * 8.8 -M * ----- ----- Basin wide percent of average 81 114 UPPER N. PLATTE RIVER COLUMBINE 9400 20.9 24.9 84 20.8 24.5 85 DIVIDE PEAK 8800 14.9 21.3 70 17.1 22.8 75 ELK RIVER 8700 16.9 20.0 84 16.1 19.2 84 JOE WRIGHT 10120 -M 22.1 * -M 25.0 * NORTH FRENCH CREEK 10100 26.4 25.6 103 20.2 23.5 86 OLD BATTLE 10000 23.6 32.2 73 25.5 30.2 84 SOUTH BRUSH CREEK 8400 9.3 13.4 69 -M 16.3 * TOWER 10500 -M 45.4 * -M 36.2 * WEBBER SPRINGS 9200 16.1 28.3 57 18.2 25.2 72 WILLOW CREEK PASS 9540 11.7 12.0 98 12.6 12.6 100 ----- ----- Basin wide percent of average 79 83 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 17.0 26.4 64 15.3 19.4 79 CASPER MTN. 7900 11.6 16.6 70 9.9 14.0 71 DEADMAN HILL 10220 12.5 16.6 75 11.7 16.7 70 DEER PARK 9700 10.4 -M * 11.5 -M * LAPRELE CREEK 8320 8.8 10.6 83 9.4 11.8 80 RENO HILL 8400 12.6 14.4 88 11.3 19.2 59 ROACH 9700 11.7 17.4 67 13.8 21.1 65 SAND LAKE 10080 24.2 33.1 73 19.9 20.3 98 SOUTH PASS 9040 9.1 16.4 55 8.5 17.1 50 WINDY PEAK 7840 7.5 8.8 85 8.3 9.5 87 ----- ----- Basin wide percent of average 72 73 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 9.0 11.3 80 12.8 15.3 84 DIVIDE PEAK 8800 14.9 21.3 70 17.1 22.8 75 OLD BATTLE 10000 23.6 32.2 73 25.5 30.2 84 SANDSTONE RS 8150 11.6 15.0 77 15.5 18.6 83 WHISKEY PARK 8950 21.5 29.0 74 20.5 28.2 73 ----- ----- Basin wide percent of average 74 79 UPPER GREEN RIVER BIG SANDY OPENING 9100 9.8 14.7 67 9.1 16.6 55 BLIND BULL SUM 8650 15.5 29.8 52 12.7 24.6 52 EAST RIM DIVIDE 7930 9.9 14.0 71 8.8 15.5 57 ELKHART PARK G.S. 9400 11.0 13.9 79 10.6 16.3 65 GROS VENTRE SUMMIT 8775 9.5 15.8 60 8.6 16.3 53 KENDALL R.S. 7740 8.3 14.7 56 9.4 15.9 59 LOOMIS PARK 8240 11.3 17.6 64 12.1 19.3 63 NEW FORK LAKE 8340 8.9 11.3 79 8.5 14.8 57 SNIDER BASIN 8250 8.8 14.9 59 10.1 15.5 65 SPRING CREEK DIVIDE 9000 16.8 28.3 59 16.9 28.1 60 TRIPLE PEAK 8500 15.1 25.9 58 17.7 31.7 56 ----- ----- Basin wide percent of average 62 58 LOWER GREEN RIVER HAMS FORK 7840 7.5 12.3 61 7.8 13.7 57 HEWINTA 9500 6.8 11.5 59 10.8 13.1 82 HICKERSON PARK 9150 7.9 6.9 114 10.2 9.5 107 HOLE-IN-ROCK 9150 6.3 6.5 97 9.2 9.5 97 INDIAN CREEK 9425 17.3 29.0 60 14.6 26.6 55 KELLEY R.S. 8180 10.5 17.3 61 12.5 19.2 65 STEEL CREEK PARK 10100 11.4 16.6 69 11.7 12.8 91 ----- ----- Basin wide percent of average 68 74 UPPER BEAR RIVER BUG LAKE 7950 12.2 21.3 57 12.6 19.6 64 HAYDEN FORK 9400 9.3 16.5 56 15.4 19.1 81 KELLEY R.S. 8180 10.5 17.3 61 12.5 19.2 65 LILY LAKE 9050 9.2 13.4 69 11.8 14.8 80 MONTE CRISTO 8960 17.6 29.9 59 18.2 25.7 71 SALT RIVER SUMMIT 7600 7.6 14.5 52 11.6 17.3 67 TRIAL LAKE 9960 14.3 25.0 57 16.4 24.0 68 ----- ----- Basin wide percent of average 59 71 ----------------------------------------------------------------------------- -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.