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 MONDAY: APRIL 30 , 2007 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 1.2 12.6 10 21.2 24.3 87 COTTONWOOD CREEK 7600 12.8 20.1 64 24.8 31.8 78 GRANITE CREEK 6770 3.2 13.1 24 16.8 22.3 75 GRASSY LAKE 7265 19.8 33.6 59 36.4 40.8 89 GROS VENTRE SUMMIT 8750 8.8 13.4 66 13.2 15.2 87 LEWIS LAKE DIVIDE 7850 19.2 34.7 55 32.4 41.5 78 PHILLIPS BENCH 8200 15.1 29.5 51 24.7 33.0 75 SALT RIVER SUMMIT 7600 3.8 10.8 35 15.8 21.5 73 SNAKE RIVER STATION 6920 .0 12.5 0 23.4 25.4 92 SPRING CREEK DIVIDE 9000 20.8 28.6 73 22.5 30.1 75 THUMB DIVIDE 7980 5.1 15.1 34 17.2 21.9 79 TOGWOTEE PASS 9580 18.8 27.8 68 23.0 28.9 80 TWO OCEAN PLATEAU 9240 27.2 31.7 86 25.3 32.0 79 WILLOW CREEK 8450 17.6 30.7 57 33.1 37.5 88 ----- ----- Basin wide percent of average 55 81 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 21.5 25.9 83 21.6 23.4 92 BLACK BEAR 8170 29.7 40.0 74 37.0 45.6 81 CANYON 8090 8.6 11.5 75 17.3 17.6 98 FISHER CREEK 9100 32.9 37.8 87 33.5 41.7 80 MADISON PLATEAU 7750 15.7 24.3 65 24.2 30.3 80 NORTHEAST ENTRANCE 7350 .3 7.3 4 14.8 14.7 101 PARKER PEAK 9400 19.9 24.4 82 20.9 19.4 108 SYLVAN LAKE 8420 14.9 23.8 63 24.4 24.6 99 THUMB DIVIDE 7980 5.1 15.1 34 17.2 21.9 79 TWO OCEAN PLATEAU 9240 27.2 31.7 86 25.3 32.0 79 WHISKEY CREEK 6800 7.8 15.4 51 19.0 24.1 79 WHITE MILL 8700 20.6 26.4 78 22.8 31.1 73 WOLVERINE 7650 .1 7.4 1 13.0 15.1 86 ----- ----- Basin wide percent of average 70 85 WIND RIVER BURROUGHS CREEK 8750 11.7 13.7 85 15.1 19.2 79 COLD SPRINGS 9630 .0 4.9 0 10.1 13.8 73 DEER PARK 9700 10.6 18.5 57 17.7 26.8 66 HOBBS PARK 10100 12.5 17.9 70 14.7 16.8 87 LITTLE WARM 9370 5.7 11.2 51 11.9 16.7 71 SOUTH PASS 9040 8.8 18.0 49 15.1 22.6 67 ST. LAWRENCE ALT 8620 .2 6.2 3 10.2 12.0 85 TOGWOTEE PASS 9580 18.8 27.8 68 23.0 28.9 80 TOWNSEND CREEK 8700 3.5 9.1 38 11.8 15.4 77 ----- ----- Basin wide percent of average 56 75 BIGHORN BASIN BALD MTN. 9380 22.3 23.5 95 18.1 21.2 85 BEAR TRAP MEADOW 8200 2.3 2.6 88 11.9 10.8 110 BLACKWATER 9780 22.4 28.7 78 22.4 24.6 91 BONE SPRINGS DIV 9350 18.7 18.3 102 19.2 18.2 105 EVENING STAR 9200 22.1 33.2 67 29.9 29.8 100 GRAVE SPRINGS 8550 6.6 11.1 59 9.3 13.0 72 KIRWIN 9550 11.2 13.0 86 14.2 14.1 101 MARQUETTE 8760 2.8 11.3 25 12.4 13.6 91 MIDDLE POWDER 7760 11.2 14.3 78 11.1 15.7 71 OWL CREEK 8975 .1 4.1 2 8.3 8.1 102 POWDER RIVER PASS 9480 8.7 10.8 81 14.5 15.7 92 SHELL CREEK 9580 16.8 16.8 100 14.7 16.7 88 SYLVAN LAKE 8420 14.9 23.8 63 24.4 24.6 99 SYLVAN ROAD 7120 .0 8.3 0 17.5 20.4 86 TIMBER CREEK 7950 1.7 4.9 35 10.1 10.4 97 YOUNTS PEAK 8350 10.5 18.1 58 15.6 18.7 83 ----- ----- Basin wide percent of average 71 92 SHOSHONE RIVER BLACKWATER 9780 22.4 28.7 78 22.4 24.6 91 EVENING STAR 9200 22.1 33.2 67 29.9 29.8 100 KIRWIN 9550 11.2 13.0 86 14.2 14.1 101 MARQUETTE 8760 2.8 11.3 25 12.4 13.6 91 SYLVAN LAKE 8420 14.9 23.8 63 24.4 24.6 99 SYLVAN ROAD 7120 .0 8.3 0 17.5 20.4 86 YOUNTS PEAK 8350 10.5 18.1 58 15.6 18.7 83 ----- ----- Basin wide percent of average 62 94 POWDER-TONGUE BEAR TRAP MEADOW 8200 2.3 2.6 88 11.9 10.8 110 BIG GOOSE 7990 8.6 11.7 74 13.8 12.8 108 BONE SPRINGS DIV 9350 18.7 18.3 102 19.2 18.2 105 BURGESS JUNCTION 7880 12.6 13.3 95 15.5 15.3 101 CLOUD PEAK RESERVOIR 9860 15.5 16.1 96 15.7 17.0 92 DOME LAKE 8880 11.6 13.5 86 16.9 16.7 101 GRAVE SPRINGS 8550 6.6 11.1 59 9.3 13.0 72 HANSEN SAWMILL 8360 2.2 5.0 44 11.1 10.9 102 MIDDLE POWDER 7760 11.2 14.3 78 11.1 15.7 71 POWDER RIVER PASS 9480 8.7 10.8 81 14.5 15.7 92 SUCKER CREEK 8880 13.2 13.1 101 18.1 17.3 105 TIE CREEK 6870 .1 4.0 2 13.3 13.4 99 ----- ----- Basin wide percent of average 83 96 BELLE FOURCHE BLIND PARK 6890 .0 4.2 0 11.2 14.1 79 COLE CANYON 5910 .4 5.3 8 10.9 -M * NORTH RAPID CREEK 6130 .0 4.1 0 10.3 11.3 91 ----- ----- Basin wide percent of average 3 85 UPPER N. PLATTE RIVER COLUMBINE 9160 4.9 21.1 23 23.7 29.1 81 DIVIDE PEAK 8860 12.3 19.4 63 21.5 24.2 89 ELK RIVER 8700 2.0 15.3 13 19.9 22.9 87 JOE WRIGHT 10120 23.0 25.0 92 26.2 29.9 88 NORTH FRENCH CREEK 10130 26.5 34.4 77 27.4 29.5 93 OLD BATTLE 9920 26.1 36.8 71 31.1 39.7 78 SAGE CREEK BASIN 7850 .1 11.3 1 13.7 14.0 98 SOUTH BRUSH CREEK 8440 .3 11.2 3 16.0 20.0 80 TOWER 10500 31.4 52.0 60 36.1 44.9 80 WEBBER SPRINGS 9250 13.2 25.2 52 25.4 31.0 82 WILLOW CREEK PASS 9540 16.1 14.2 113 15.2 15.6 97 ----- ----- Basin wide percent of average 59 85 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10220 20.9 28.1 74 23.1 26.8 86 CASPER MTN. 7850 8.5 17.1 50 14.5 19.3 75 DEADMAN HILL 10220 13.9 19.6 71 20.7 20.9 99 DEER PARK 9700 10.6 18.5 57 17.7 26.8 66 LAPRELE CREEK 8375 1.8 7.3 25 12.9 16.4 79 RENO HILL 8500 11.5 14.8 78 18.1 20.0 90 ROACH 9700 18.7 18.5 101 22.8 22.3 102 SAND LAKE 10050 28.6 36.9 78 28.9 29.1 99 SOUTH PASS 9040 8.8 18.0 49 15.1 22.6 67 WINDY PEAK 7900 2.1 5.1 41 13.3 13.4 99 ----- ----- Basin wide percent of average 68 86 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 4.9 0 14.4 18.5 78 DIVIDE PEAK 8860 12.3 19.4 63 21.5 24.2 89 OLD BATTLE 9920 26.1 36.8 71 31.1 39.7 78 SANDSTONE RS 8150 .5 9.7 5 16.8 21.8 77 WHISKEY PARK 8950 17.1 30.5 56 26.3 33.6 78 ----- ----- Basin wide percent of average 55 80 UPPER GREEN RIVER BIG SANDY OPENING 9080 6.4 13.6 47 12.0 15.8 76 BLIND BULL SUM 8900 23.1 28.0 82 19.0 25.1 76 EAST RIM DIVIDE 7930 .0 13.2 0 10.4 13.8 75 ELKHART PARK G.S. 9400 10.0 12.9 78 13.8 15.9 87 GROS VENTRE SUMMIT 8750 8.8 13.4 66 13.2 15.2 87 KENDALL R.S. 7740 .1 10.2 1 14.0 16.5 85 LOOMIS PARK 8240 2.8 14.5 19 15.7 19.8 79 NEW FORK LAKE 8340 3.5 8.6 41 10.5 13.3 79 SNIDER BASIN 8060 6.2 12.7 49 13.2 18.4 72 SPRING CREEK DIVIDE 9000 20.8 28.6 73 22.5 30.1 75 TRIPLE PEAK 8500 14.6 23.8 61 25.6 28.5 90 ----- ----- Basin wide percent of average 54 80 LOWER GREEN RIVER HAMS FORK 7840 .0 6.2 0 11.4 14.6 78 HEWINTA 9500 -M 9.5 * 14.0 17.7 79 HICKERSON PARK 9100 .4 5.9 7 12.0 10.1 119 HOLE-IN-ROCK 9150 .4 4.9 8 10.8 9.6 113 INDIAN CREEK 9425 16.2 28.4 57 19.7 29.4 67 KELLEY R.S. 8180 7.8 14.3 55 17.2 23.5 73 STEEL CREEK PARK 10100 14.0 18.5 76 15.0 20.1 75 ----- ----- Basin wide percent of average 50 80 UPPER BEAR RIVER BUG LAKE 7950 8.4 18.2 46 16.2 22.3 73 HAYDEN FORK 9100 .0 13.2 0 20.9 25.0 84 KELLEY R.S. 8180 7.8 14.3 55 17.2 23.5 73 LILY LAKE 9050 2.1 11.3 19 15.6 21.0 74 MONTE CRISTO 8960 13.7 28.4 48 23.5 30.1 78 SALT RIVER SUMMIT 7600 3.8 10.8 35 15.8 21.5 73 TRIAL LAKE 9960 11.9 26.5 45 22.1 29.3 75 ----- ----- Basin wide percent of average 39 76 ----------------------------------------------------------------------------- -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 1971-2000. 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.