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 FRIDAY: APRIL 2 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 23.9 17.7 135 27.2 22.9 119 COTTONWOOD CREEK 7600 25.4 24.5 104 28.2 25.9 109 GRANITE CREEK 6770 21.7 18.9 116 23.2 24.2 96 GRASSY LAKE 7265 43.3 36.5 119 40.8 38.3 107 GROS VENTRE SUMMIT 8775 16.2 16.0 102 15.9 16.4 97 LEWIS LAKE DIVIDE 7860 40.8 35.8 114 39.8 38.9 103 PHILLIPS BENCH 8200 32.8 29.7 111 31.9 30.9 104 SALT RIVER SUMMIT 7600 16.2 14.5 112 18.5 17.4 107 SNAKE RIVER STATION 6920 22.9 18.9 122 25.9 26.9 97 SPRING CREEK DIVIDE 9000 30.4 28.4 107 27.9 28.2 99 THUMB DIVIDE 7980 -M 17.4 * -M 21.4 * TOGWOTEE PASS 9580 -M 25.4 * 28.5 29.2 98 TWO OCEAN PLATEAU 9360 36.4 26.9 136 31.4 31.7 100 WILLOW CREEK 8450 33.8 30.7 111 37.8 33.2 115 ----- ----- Basin wide percent of average 116 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 26.4 24.0 110 23.4 18.4 127 BLACK BEAR 7950 50.8 38.8 132 -M 41.5 * CANYON 7940 18.2 13.2 138 19.4 14.5 134 FISHER CREEK 9100 40.2 36.3 111 36.7 37.3 99 MADISON PLATEAU 7750 -M 24.9 * 31.5 26.9 118 NORTHEAST ENTRANCE 7350 11.9 9.2 129 14.0 12.0 117 PARKER PEAK 9400 23.9 22.0 109 -M 15.9 * SYLVAN LAKE 8420 26.4 22.5 117 27.9 19.5 144 THUMB DIVIDE 7980 -M 17.4 * -M 21.4 * TWO OCEAN PLATEAU 9360 36.4 26.9 136 31.4 31.7 100 WHISKEY CREEK 6800 -M 17.7 * -M 22.4 * WHITE MILL 8700 27.9 25.2 111 24.7 28.9 86 WOLVERINE 7650 12.5 11.9 106 12.6 13.0 98 ----- ----- Basin wide percent of average 120 110 WIND RIVER BURROUGHS CREEK 8750 17.2 15.1 114 18.4 16.9 110 COLD SPRINGS 9630 9.5 8.5 112 12.7 10.7 119 DEER PARK 9700 17.2 -M * 21.9 -M * HOBBS PARK 10100 18.2 15.4 119 16.9 14.5 118 LITTLE WARM 9620 15.0 11.9 128 16.4 13.5 121 SOUTH PASS 9040 18.4 16.5 112 19.4 17.4 113 ST. LAWRENCE ALT 8620 7.3 7.6 97 11.1 10.4 108 TOGWOTEE PASS 9580 -M 25.4 * 28.5 29.2 98 TOWNSEND CREEK 8700 10.9 10.0 109 14.0 12.7 110 ----- ----- Basin wide percent of average 114 110 BIGHORN BASIN BALD MTN. 9375 19.9 20.7 96 18.0 17.7 103 BEAR TRAP MEADOW 7900 5.0 7.3 70 9.6 8.4 116 BLACKWATER 9780 30.7 22.7 136 25.0 18.2 138 BONE SPRINGS DIV 9350 16.4 16.7 99 16.2 15.4 106 EVENING STAR 9200 33.7 27.4 123 34.8 22.9 152 GRAVE SPRINGS 8550 8.5 9.7 87 11.5 9.7 118 KIRWIN 9550 12.9 10.1 127 14.0 11.0 129 MARQUETTE 8760 8.9 8.2 108 9.5 9.7 97 MIDDLE POWDER 7760 11.1 12.5 90 15.9 12.0 132 OWL CREEK 8975 6.5 4.8 139 6.8 6.3 107 POWDER RIVER PASS 9480 12.1 11.0 111 15.2 11.7 130 SHELL CREEK 9580 16.7 15.1 111 15.5 13.2 118 SYLVAN LAKE 8420 26.4 22.5 117 27.9 19.5 144 SYLVAN ROAD 8120 17.4 12.5 140 19.7 16.4 121 TIMBER CREEK 7950 5.6 6.5 88 7.5 7.3 105 YOUNTS PEAK 8350 21.7 17.4 125 19.2 16.9 114 ----- ----- Basin wide percent of average 113 124 SHOSHONE RIVER BLACKWATER 9780 30.7 22.7 136 25.0 18.2 138 EVENING STAR 9200 33.7 27.4 123 34.8 22.9 152 KIRWIN 9550 12.9 10.1 127 14.0 11.0 129 MARQUETTE 8760 8.9 8.2 108 9.5 9.7 97 SYLVAN LAKE 8420 26.4 22.5 117 27.9 19.5 144 SYLVAN ROAD 8120 17.4 12.5 140 19.7 16.4 121 YOUNTS PEAK 8350 21.7 17.4 125 19.2 16.9 114 ----- ----- Basin wide percent of average 126 132 POWDER-TONGUE BEAR TRAP MEADOW 7900 5.0 7.3 70 9.6 8.4 116 BIG GOOSE 7990 6.8 -M * 10.4 -M * BONE SPRINGS DIV 9350 16.4 16.7 99 16.2 15.4 106 BURGESS JUNCTION 7880 9.1 12.0 77 11.0 11.6 94 CLOUD PEAK RESERVOIR 9860 15.6 15.1 104 13.5 13.5 100 DOME LAKE 8880 -M 14.0 * 11.6 13.5 87 GRAVE SPRINGS 8550 8.5 9.7 87 11.5 9.7 118 HANSEN SAWMILL 8760 4.8 7.3 66 8.7 8.0 109 MIDDLE POWDER 7760 11.1 12.5 90 15.9 12.0 132 POWDER RIVER PASS 9480 12.1 11.0 111 15.2 11.7 130 SUCKER CREEK 8880 10.7 12.4 87 13.1 13.4 99 TIE CREEK 6870 2.8 -M * 9.1 11.1 82 ----- ----- Basin wide percent of average 90 106 BELLE FOURCHE BLIND PARK 6890 6.8 11.2 60 16.0 10.2 156 NORTH RAPID CREEK 6130 5.8 -M * 13.2 -M * WARREN PEAK 6520 10.5 11.2 93 14.7 8.1 182 ----- ----- Basin wide percent of average 77 168 UPPER N. PLATTE RIVER COLUMBINE 9400 18.2 24.9 74 21.4 24.7 87 DIVIDE PEAK 8800 18.7 21.4 88 24.0 23.0 105 ELK RIVER 8700 15.6 20.2 78 21.4 19.4 111 JOE WRIGHT 10120 19.7 22.4 89 25.9 25.2 103 NORTH FRENCH CREEK 10100 29.7 25.9 115 28.7 23.7 122 OLD BATTLE 10000 28.7 32.5 89 35.3 30.4 116 SOUTH BRUSH CREEK 8400 11.5 13.5 86 19.4 16.5 117 TOWER 10500 43.0 45.8 95 37.7 36.5 104 WEBBER SPRINGS 9200 19.0 28.4 67 25.9 25.4 102 WILLOW CREEK PASS 9540 12.0 12.2 98 11.9 12.7 93 ----- ----- Basin wide percent of average 88 106 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 15.6 26.7 59 22.0 19.7 113 CASPER MTN. 7900 11.0 16.9 66 16.2 14.2 115 DEADMAN HILL 10220 15.6 16.7 94 16.9 16.9 100 DEER PARK 9700 17.2 -M * 21.9 -M * LAPRELE CREEK 8320 -M 10.6 * 14.2 12.0 120 RENO HILL 8400 14.0 14.5 97 18.0 19.4 93 ROACH 9700 15.4 17.5 88 18.9 21.4 89 SAND LAKE 10080 34.3 33.3 103 28.2 20.5 138 SOUTH PASS 9040 18.4 16.5 112 19.4 17.4 113 WINDY PEAK 7840 6.5 9.0 72 12.7 9.6 133 ----- ----- Basin wide percent of average 87 111 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.0 11.4 97 17.2 15.5 111 DIVIDE PEAK 8800 18.7 21.4 88 24.0 23.0 105 OLD BATTLE 10000 28.7 32.5 89 35.3 30.4 116 SANDSTONE RS 8150 12.0 15.1 79 20.4 18.9 108 WHISKEY PARK 8950 25.9 29.2 89 29.0 28.4 103 ----- ----- Basin wide percent of average 88 109 UPPER GREEN RIVER BIG SANDY OPENING 9100 16.2 14.9 110 15.5 16.7 93 BLIND BULL SUM 8650 28.4 29.9 95 22.5 24.7 92 EAST RIM DIVIDE 7930 14.2 14.1 101 14.5 15.6 93 ELKHART PARK G.S. 9400 14.0 14.0 100 14.7 16.4 90 GROS VENTRE SUMMIT 8775 16.2 16.0 102 15.9 16.4 97 KENDALL R.S. 7740 15.2 14.6 105 16.4 16.0 102 LOOMIS PARK 8240 -M 17.7 * 20.7 19.4 107 NEW FORK LAKE 8340 12.5 11.4 110 11.7 15.0 79 SNIDER BASIN 8250 17.7 15.0 118 18.0 15.6 116 SPRING CREEK DIVIDE 9000 30.4 28.4 107 27.9 28.2 99 TRIPLE PEAK 8500 30.4 26.0 117 30.4 31.9 95 ----- ----- Basin wide percent of average 106 97 LOWER GREEN RIVER HAMS FORK 7840 14.0 12.0 117 11.9 13.9 86 HEWINTA 9500 12.4 11.5 108 14.4 13.4 108 HICKERSON PARK 9150 6.0 7.0 86 9.7 9.6 102 HOLE-IN-ROCK 9150 6.5 6.5 99 -M 9.6 * INDIAN CREEK 9425 30.5 29.2 105 25.4 26.7 96 KELLEY R.S. 8180 17.2 17.4 99 18.7 19.4 97 STEEL CREEK PARK 10100 14.6 16.7 88 16.7 13.0 128 ----- ----- Basin wide percent of average 101 101 UPPER BEAR RIVER BUG LAKE 7950 22.4 21.4 105 20.4 19.9 103 HAYDEN FORK 9400 15.2 16.2 95 20.2 19.4 105 KELLEY R.S. 8180 17.2 17.4 99 18.7 19.4 97 LILY LAKE 9050 12.4 13.5 92 18.4 15.0 123 MONTE CRISTO 8960 26.4 29.9 88 26.4 25.9 102 SALT RIVER SUMMIT 7600 16.2 14.5 112 18.5 17.4 107 TRIAL LAKE 9960 21.2 25.2 85 22.2 24.2 92 ----- ----- Basin wide percent of average 95 103 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. 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.