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 WEDNESDAY: APRIL 14 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 9.8 17.2 57 13.4 22.8 59 COTTONWOOD CREEK 7670 16.4 24.0 68 22.2 29.5 75 GRAND TARGHEE 9260 40.0 -M * 29.9 -M * GRANITE CREEK 6770 10.0 17.3 58 12.6 21.0 60 GRASSY LAKE 7265 -M 37.1 * -M 38.2 * GROS VENTRE SUMMIT 8750 8.9 14.6 61 8.9 13.9 64 GUNSIGHT PASS 9820 9.5 -M * 10.9 -M * LEWIS LAKE DIVIDE 7850 19.7 36.7 54 22.2 39.1 57 PHILLIPS BENCH 8200 19.1 30.5 63 20.6 30.9 67 SALT RIVER SUMMIT 7760 11.0 14.6 75 12.9 20.1 64 SNAKE RIVER STATION 6920 7.7 17.9 43 17.1 23.8 72 SPRING CREEK DIVIDE 9000 19.3 28.4 68 18.4 28.3 65 THUMB DIVIDE 7980 10.8 18.9 57 13.6 20.3 67 TOGWOTEE PASS 9580 19.7 26.5 74 19.6 26.5 74 TWO OCEAN PLATEAU 9240 22.5 30.3 74 18.3 29.6 62 WILLOW CREEK 8380 23.4 31.8 74 28.0 34.6 81 ----- ----- Basin wide percent of average 64 67 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 14.6 25.3 58 13.8 21.6 64 BLACK BEAR 8170 27.7 40.8 68 26.6 43.0 62 CANYON 7870 8.8 14.1 62 11.1 16.5 67 FISHER CREEK 9100 24.9 36.9 67 23.4 38.8 60 MADISON PLATEAU 7750 16.8 26.2 64 20.4 28.7 71 NORTHEAST ENTRANCE 7350 5.8 10.9 53 9.1 13.6 67 PARKER PEAK 9400 19.5 23.3 84 13.4 17.6 76 SYLVAN LAKE 8420 14.6 24.1 61 18.0 22.5 80 THUMB DIVIDE 7980 10.8 18.9 57 13.6 20.3 67 TWO OCEAN PLATEAU 9240 22.5 30.3 74 18.3 29.6 62 WHISKEY CREEK 6800 10.4 17.8 58 12.8 22.5 57 WHITE MILL 8700 17.1 25.9 66 16.2 28.9 56 WOLVERINE 7650 7.5 11.4 66 7.6 13.8 55 ----- ----- Basin wide percent of average 66 64 WIND RIVER BURROUGHS CREEK 8750 8.9 15.2 59 8.7 17.5 50 COLD SPRINGS 9630 7.6 7.6 100 9.8 11.9 82 DEER PARK 9700 18.1 16.8 108 20.2 23.9 85 HOBBS PARK 10100 17.5 16.8 104 17.1 14.4 119 LITTLE WARM 9370 8.1 12.6 64 9.0 14.6 62 SOUTH PASS 9040 16.3 17.7 92 17.8 20.1 89 ST. LAWRENCE ALT 8620 9.3 7.5 124 11.1 10.0 111 TOGWOTEE PASS 9580 19.7 26.5 74 19.6 26.5 74 TOWNSEND CREEK 8700 13.1 9.8 134 15.8 13.1 121 ----- ----- Basin wide percent of average 91 85 BIGHORN BASIN BALD MTN. 9380 14.3 21.6 66 11.5 18.9 61 BEAR TRAP MEADOW 8200 8.0 4.8 167 9.0 9.2 98 BLACKWATER 9780 18.3 26.6 69 16.8 22.4 75 BONE SPRINGS DIV 9350 12.5 17.5 71 10.5 16.0 66 EVENING STAR 9200 20.1 31.9 63 21.4 27.3 78 GRAVE SPRINGS 8550 9.9 10.5 94 11.0 11.1 99 KIRWIN 9550 10.1 12.3 82 9.7 12.3 79 MARQUETTE 8760 7.7 10.4 74 8.9 11.2 79 MIDDLE POWDER 7760 11.5 13.8 83 9.4 13.6 69 OWL CREEK 8975 6.0 5.4 111 5.5 6.7 82 POWDER RIVER PASS 9480 9.7 11.8 82 11.5 13.6 85 SHELL CREEK 9580 12.0 16.0 75 10.9 14.6 75 SYLVAN LAKE 8420 14.6 24.1 61 18.0 22.5 80 SYLVAN ROAD 7120 6.8 12.5 54 12.7 18.8 68 TIMBER CREEK 7950 5.0 5.7 88 6.7 8.4 80 YOUNTS PEAK 8350 11.1 18.0 62 9.7 17.3 56 ----- ----- Basin wide percent of average 73 75 SHOSHONE RIVER BLACKWATER 9780 18.3 26.6 69 16.8 22.4 75 EVENING STAR 9200 20.1 31.9 63 21.4 27.3 78 KIRWIN 9550 10.1 12.3 82 9.7 12.3 79 MARQUETTE 8760 7.7 10.4 74 8.9 11.2 79 SYLVAN LAKE 8420 14.6 24.1 61 18.0 22.5 80 SYLVAN ROAD 7120 6.8 12.5 54 12.7 18.8 68 YOUNTS PEAK 8350 11.1 18.0 62 9.7 17.3 56 ----- ----- Basin wide percent of average 65 74 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.0 4.8 167 9.0 9.2 98 BIG GOOSE 7990 9.5 12.2 78 10.8 10.2 106 BONE SPRINGS DIV 9350 12.5 17.5 71 10.5 16.0 66 BURGESS JUNCTION 7880 10.8 13.1 82 10.8 13.4 81 CLOUD PEAK RESERVOIR 9860 13.2 15.0 88 11.9 14.4 83 DOME LAKE 8880 9.1 13.9 65 11.7 14.5 81 GRAVE SPRINGS 8550 9.9 10.5 94 11.0 11.1 99 HANSEN SAWMILL 8360 6.7 6.3 106 7.8 9.2 85 MIDDLE POWDER 7760 11.5 13.8 83 9.4 13.6 69 POWDER RIVER PASS 9480 9.7 11.8 82 11.5 13.6 85 SUCKER CREEK 8880 12.3 13.4 92 13.5 15.0 90 TIE CREEK 6870 3.4 5.4 63 10.1 11.2 90 ----- ----- Basin wide percent of average 85 85 BELLE FOURCHE BLIND PARK 6890 5.4 7.9 68 12.3 12.1 102 COLE CANYON 5910 5.4 7.2 75 10.2 7.5 136 NORTH RAPID CREEK 6130 5.9 8.9 66 11.1 9.4 118 ----- ----- Basin wide percent of average 70 116 UPPER N. PLATTE RIVER COLUMBINE 9160 20.8 24.8 84 23.1 26.9 86 DIVIDE PEAK 8880 23.3 20.8 112 25.4 22.2 114 ELK RIVER 8700 19.8 19.9 99 21.1 21.0 100 JOE WRIGHT 10120 19.9 23.3 85 22.5 26.9 84 NORTH FRENCH CREEK 10130 38.0 32.2 118 35.8 26.6 135 OLD BATTLE 10000 35.5 34.4 103 38.0 36.8 103 SAGE CREEK BASIN 7850 17.4 12.1 144 13.9 12.9 108 SOUTH BRUSH CREEK 8440 14.2 13.4 106 19.3 17.9 108 TOWER 10500 37.8 49.1 77 35.0 41.2 85 WEBBER SPRINGS 9250 25.4 26.2 97 29.6 28.6 103 WILLOW CREEK PASS 9540 9.2 13.4 69 11.6 14.0 83 ----- ----- Basin wide percent of average 97 100 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.2 26.1 85 23.4 24.1 97 CASPER MTN. 7900 17.5 16.5 106 16.8 16.3 103 DEADMAN HILL 10220 21.6 18.1 119 18.5 18.5 100 DEER PARK 9700 18.1 16.8 108 20.2 23.9 85 LAPRELE CREEK 8375 10.8 10.5 103 14.6 14.0 104 RENO HILL 8400 17.6 15.8 111 19.5 17.0 115 ROACH 9700 18.5 18.3 101 21.7 20.1 108 SAND LAKE 10050 32.5 34.7 94 32.2 26.2 123 SOUTH PASS 9040 16.3 17.7 92 17.8 20.1 89 WINDY PEAK 7900 9.9 8.2 121 12.6 11.6 109 ----- ----- Basin wide percent of average 101 103 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.1 9.1 122 15.6 17.0 92 DIVIDE PEAK 8880 23.3 20.8 112 25.4 22.2 114 OLD BATTLE 10000 35.5 34.4 103 38.0 36.8 103 SANDSTONE RS 8150 14.9 13.7 109 18.1 19.9 91 WHISKEY PARK 8950 27.1 30.7 88 31.8 30.7 104 ----- ----- Basin wide percent of average 103 102 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.5 15.3 69 10.4 14.4 72 BLIND BULL SUM 8650 17.0 28.9 59 12.5 23.6 53 EAST RIM DIVIDE 7930 6.7 13.9 48 7.6 12.8 59 ELKHART PARK G.S. 9400 9.3 14.0 66 9.9 14.4 69 GROS VENTRE SUMMIT 8750 8.9 14.6 61 8.9 13.9 64 GUNSIGHT PASS 9820 9.5 -M * 10.9 -M * KENDALL R.S. 7740 6.7 13.8 49 9.0 15.4 58 LOOMIS PARK 8240 9.0 17.2 52 11.2 18.5 61 NEW FORK LAKE 8340 6.7 11.4 59 7.1 12.2 58 POCKET CREEK 9360 9.1 -M * 12.0 -M * SNIDER BASIN 8060 10.2 15.0 68 11.3 17.3 65 SPRING CREEK DIVIDE 9000 19.3 28.4 68 18.4 28.3 65 TRIPLE PEAK 8500 18.4 25.9 71 20.0 26.5 75 ----- ----- Basin wide percent of average 62 64 LOWER GREEN RIVER HAMS FORK 7840 9.2 10.3 89 10.1 13.2 77 HEWINTA 9519 11.4 12.4 92 12.6 16.0 79 HICKERSON PARK 9145 8.9 8.4 106 11.2 8.8 127 HOLE-IN-ROCK 9150 8.0 7.4 108 10.4 8.3 125 INDIAN CREEK 9425 19.8 29.5 67 17.4 27.4 64 KELLEY R.S. 8180 12.3 17.3 71 14.6 21.9 67 STEEL CREEK PARK 10200 14.8 17.1 87 15.8 18.0 88 ----- ----- Basin wide percent of average 82 81 UPPER BEAR RIVER BUG LAKE 7950 12.0 21.8 55 15.7 20.6 76 HAYDEN FORK 9212 14.0 16.7 84 18.1 22.8 79 KELLEY R.S. 8180 12.3 17.3 71 14.6 21.9 67 LILY LAKE 9156 13.0 14.6 89 14.5 19.1 76 MONTE CRISTO 8960 20.9 30.6 68 19.9 27.5 72 SALT RIVER SUMMIT 7760 11.0 14.6 75 12.9 20.1 64 TRIAL LAKE 9992 17.9 26.3 68 15.7 26.9 58 ----- ----- Basin wide percent of average 71 70 ----------------------------------------------------------------------------- -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.