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 24 , 2003 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 11.9 14.3 83 23.5 23.8 99 COTTONWOOD CREEK 7600 17.6 21.6 81 26.0 30.9 84 GRANITE CREEK 6770 8.5 14.6 58 17.9 21.9 82 GRASSY LAKE 7265 30.1 35.0 86 35.4 39.9 89 GROS VENTRE SUMMIT 8775 12.2 13.9 88 12.7 14.8 86 LEWIS LAKE DIVIDE 7860 -M 35.5 * -M 40.6 * PHILLIPS BENCH 8200 23.4 29.9 78 25.7 32.2 80 SALT RIVER SUMMIT 7600 7.4 12.3 60 15.0 21.0 71 SNAKE RIVER STATION 6920 -M 14.5 * -M 24.8 * SPRING CREEK DIVIDE 9000 25.8 28.6 90 24.7 29.4 84 THUMB DIVIDE 7980 11.7 16.6 70 18.1 21.3 85 TOGWOTEE PASS 9580 24.9 27.4 91 25.7 28.0 92 TWO OCEAN PLATEAU 9360 34.4 31.3 110 28.5 31.1 92 WILLOW CREEK 8450 24.8 31.2 79 36.1 36.5 99 ----- ----- Basin wide percent of average 84 87 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 28.0 25.7 109 24.6 22.8 108 BLACK BEAR 8170 35.7 40.3 89 33.5 44.7 75 CANYON 8090 11.8 12.4 95 15.9 17.2 92 FISHER CREEK 9100 37.5 37.4 100 36.5 40.7 90 MADISON PLATEAU 7750 19.8 25.0 79 22.4 29.6 76 NORTHEAST ENTRANCE 7350 5.9 8.7 68 14.6 14.3 102 PARKER PEAK 9400 27.1 24.0 113 22.1 18.8 118 SYLVAN LAKE 8420 -M 24.0 * -M 23.9 * THUMB DIVIDE 7980 11.7 16.6 70 18.1 21.3 85 TWO OCEAN PLATEAU 9360 34.4 31.3 110 28.5 31.1 92 WHISKEY CREEK 6800 10.7 16.3 66 17.2 23.5 73 WHITE MILL 8700 28.4 26.2 108 25.4 30.3 84 WOLVERINE 7650 6.7 8.9 75 13.5 14.7 92 ----- ----- Basin wide percent of average 94 88 WIND RIVER BURROUGHS CREEK 8750 17.2 14.3 120 20.0 18.6 108 COLD SPRINGS 9630 3.1 5.8 53 11.1 13.2 84 DEER PARK 9700 14.5 17.9 81 19.5 25.9 75 HOBBS PARK 10100 13.1 17.5 75 14.7 16.0 92 LITTLE WARM 9370 7.2 11.7 62 12.2 16.0 76 SOUTH PASS 9040 11.9 17.9 66 15.7 21.7 72 ST. LAWRENCE ALT 8620 3.6 6.6 55 9.5 11.4 83 TOGWOTEE PASS 9580 24.9 27.4 91 25.7 28.0 92 TOWNSEND CREEK 8700 7.5 9.4 80 13.4 14.6 92 ----- ----- Basin wide percent of average 80 86 BIGHORN BASIN BALD MTN. 9380 18.1 22.9 79 18.3 20.4 90 BEAR TRAP MEADOW 8200 1.8 3.5 51 9.1 10.3 88 BLACKWATER 9780 27.2 28.0 97 23.8 23.8 100 BONE SPRINGS DIV 9350 18.3 18.0 102 18.0 17.5 103 EVENING STAR 9200 30.7 32.7 94 33.8 28.9 117 GRAVE SPRINGS 8550 5.5 10.9 50 8.9 12.3 72 KIRWIN 9550 12.7 12.7 100 13.9 13.5 103 MARQUETTE 8760 12.8 11.0 116 15.1 12.8 118 MIDDLE POWDER 7760 8.1 14.2 57 8.3 15.0 55 OWL CREEK 8975 .9 4.5 20 6.9 7.7 90 POWDER RIVER PASS 9480 8.7 11.2 78 13.5 15.0 90 SHELL CREEK 9580 15.5 16.5 94 15.6 16.0 98 SYLVAN LAKE 8420 -M 24.0 * -M 23.9 * SYLVAN ROAD 7120 10.5 9.8 107 18.7 19.9 94 TIMBER CREEK 7950 4.7 5.2 90 8.9 9.8 91 YOUNTS PEAK 8350 16.9 18.1 93 17.5 18.2 96 ----- ----- Basin wide percent of average 88 96 SHOSHONE RIVER BLACKWATER 9780 27.2 28.0 97 23.8 23.8 100 EVENING STAR 9200 30.7 32.7 94 33.8 28.9 117 KIRWIN 9550 12.7 12.7 100 13.9 13.5 103 MARQUETTE 8760 12.8 11.0 116 15.1 12.8 118 SYLVAN LAKE 8420 -M 24.0 * -M 23.9 * SYLVAN ROAD 7120 10.5 9.8 107 18.7 19.9 94 YOUNTS PEAK 8350 16.9 18.1 93 17.5 18.2 96 ----- ----- Basin wide percent of average 99 105 POWDER-TONGUE BEAR TRAP MEADOW 8200 1.8 3.5 51 9.1 10.3 88 BIG GOOSE 7990 10.9 11.9 92 15.1 11.9 127 BONE SPRINGS DIV 9350 18.3 18.0 102 18.0 17.5 103 BURGESS JUNCTION 7880 12.5 13.3 94 15.5 14.7 105 CLOUD PEAK RESERVOIR 9860 15.7 15.8 99 16.0 16.1 99 DOME LAKE 8880 12.0 13.7 88 16.9 16.0 106 GRAVE SPRINGS 8550 5.5 10.9 50 8.9 12.3 72 HANSEN SAWMILL 8360 3.9 5.5 71 11.2 10.3 109 MIDDLE POWDER 7760 8.1 14.2 57 8.3 15.0 55 POWDER RIVER PASS 9480 8.7 11.2 78 13.5 15.0 90 SUCKER CREEK 8880 14.0 13.3 105 18.1 16.5 110 TIE CREEK 6870 3.8 4.5 84 15.1 12.7 119 ----- ----- Basin wide percent of average 85 98 BELLE FOURCHE BLIND PARK 6890 .0 5.6 0 11.0 13.5 81 COLE CANYON 5910 .1 -M * 7.7 -M * NORTH RAPID CREEK 6130 .1 6.0 2 9.1 10.7 85 ----- ----- Basin wide percent of average 1 83 UPPER N. PLATTE RIVER COLUMBINE 9400 20.6 22.6 91 28.0 28.3 99 DIVIDE PEAK 8800 21.0 20.0 105 24.2 23.5 103 ELK RIVER 8700 16.0 17.0 94 22.7 22.2 102 JOE WRIGHT 10120 29.4 24.4 120 33.9 28.9 117 NORTH FRENCH CREEK 10100 34.8 33.7 103 33.3 28.6 116 OLD BATTLE 10000 34.1 35.9 95 37.5 38.7 97 SAGE CREEK BASIN 7850 2.7 11.6 23 14.3 13.6 105 SOUTH BRUSH CREEK 8400 -M 12.1 * 21.0 19.2 109 TOWER 10500 -M 51.0 * 47.0 43.6 108 WEBBER SPRINGS 9200 20.8 25.5 82 28.4 30.1 94 WILLOW CREEK PASS 9540 19.6 13.9 141 17.6 15.0 117 ----- ----- Basin wide percent of average 97 106 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.9 27.5 69 23.7 25.9 92 CASPER MTN. 7900 14.2 17.0 84 14.2 18.3 78 DEADMAN HILL 10220 18.5 19.1 97 22.4 20.1 111 DEER PARK 9700 14.5 17.9 81 19.5 25.9 75 LAPRELE CREEK 8320 6.7 8.5 79 13.6 15.6 87 RENO HILL 8400 14.3 15.2 94 17.5 19.0 92 ROACH 9700 18.5 18.5 100 22.6 21.5 105 SAND LAKE 10080 29.8 36.1 83 25.9 28.1 92 SOUTH PASS 9040 11.9 17.9 66 15.7 21.7 72 WINDY PEAK 7840 -M 6.3 * -M 12.8 * ----- ----- Basin wide percent of average 83 89 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 6.4 * 18.1 18.0 101 DIVIDE PEAK 8800 21.0 20.0 105 24.2 23.5 103 OLD BATTLE 10000 34.1 35.9 95 37.5 38.7 97 SANDSTONE RS 8150 8.5 11.2 76 21.4 21.2 101 WHISKEY PARK 8950 -M 30.6 * -M 32.6 * ----- ----- Basin wide percent of average 95 100 UPPER GREEN RIVER BIG SANDY OPENING 9100 10.8 14.3 76 12.5 15.3 82 BLIND BULL SUM 8650 23.4 28.3 83 18.1 24.6 74 EAST RIM DIVIDE 7930 9.2 13.5 68 10.9 13.5 81 ELKHART PARK G.S. 9400 12.1 13.3 91 13.3 15.4 86 GROS VENTRE SUMMIT 8775 12.2 13.9 88 12.7 14.8 86 KENDALL R.S. 7740 6.6 11.6 57 13.8 16.2 85 LOOMIS PARK 8240 12.0 15.5 77 17.1 19.4 88 NEW FORK LAKE 8340 7.2 9.7 74 -M 12.9 * SNIDER BASIN 8250 9.4 13.6 69 13.8 18.0 77 SPRING CREEK DIVIDE 9000 25.8 28.6 90 24.7 29.4 84 TRIPLE PEAK 8500 18.9 24.7 77 27.8 27.8 100 ----- ----- Basin wide percent of average 79 85 LOWER GREEN RIVER HAMS FORK 7840 3.8 7.8 49 11.6 14.1 82 HEWINTA 9500 7.1 10.6 67 13.5 17.1 79 HICKERSON PARK 9150 2.8 6.8 41 9.5 9.7 98 HOLE-IN-ROCK 9150 5.7 5.8 98 10.4 9.2 113 INDIAN CREEK 9425 22.5 28.9 78 20.9 28.6 73 KELLEY R.S. 8180 10.7 15.5 69 15.2 22.9 66 STEEL CREEK PARK 10100 15.3 18.0 85 15.5 19.3 80 ----- ----- Basin wide percent of average 73 80 UPPER BEAR RIVER BUG LAKE 7950 13.0 19.6 66 17.2 21.7 79 HAYDEN FORK 9400 8.0 14.5 55 20.1 24.2 83 KELLEY R.S. 8180 10.7 15.5 69 15.2 22.9 66 LILY LAKE 9050 7.1 12.6 56 16.4 20.3 81 MONTE CRISTO 8960 12.5 29.3 43 22.9 29.2 78 SALT RIVER SUMMIT 7600 7.4 12.3 60 15.0 21.0 71 TRIAL LAKE 9960 14.3 26.5 54 19.0 28.4 67 ----- ----- Basin wide percent of average 56 75 ----------------------------------------------------------------------------- -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.