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 SATURDAY: APRIL 25 , 1998 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 13.8 12.7 109 22.7 24.7 92 COTTONWOOD CREEK 7600 20.0 21.2 94 25.6 27.7 92 GRANITE CREEK 6770 15.0 14.7 102 22.2 26.2 85 GRASSY LAKE 7265 32.1 35.4 91 38.2 41.1 93 GROS VENTRE SUMMIT 8775 12.4 14.7 84 14.9 17.7 84 LEWIS LAKE DIVIDE 7860 33.1 35.3 94 35.2 41.8 84 PHILLIPS BENCH 8200 28.0 30.0 93 28.6 33.0 87 SALT RIVER SUMMIT 7600 14.4 11.9 121 19.9 18.8 106 SNAKE RIVER STATION 6920 16.0 17.2 93 24.7 28.9 85 SPRING CREEK DIVIDE 9000 24.9 29.5 84 24.2 30.3 80 THUMB DIVIDE 7980 17.0 16.0 106 19.9 23.1 86 TOGWOTEE PASS 9580 25.5 27.8 92 26.6 31.3 85 TWO OCEAN PLATEAU 9360 31.2 27.2 115 30.2 34.0 89 WILLOW CREEK 8450 26.5 31.8 83 35.0 35.5 99 ----- ----- Basin wide percent of average 95 89 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 20.5 25.8 79 18.3 20.6 89 BLACK BEAR 7950 41.3 40.0 103 39.9 45.5 88 CANYON 7940 12.7 11.9 107 16.4 15.9 103 FISHER CREEK 9100 30.2 38.4 79 30.7 41.2 75 MADISON PLATEAU 7750 22.3 24.5 91 25.7 29.3 88 NORTHEAST ENTRANCE 7350 3.9 7.1 55 12.7 13.5 94 PARKER PEAK 9400 20.3 23.5 86 17.8 17.7 101 SYLVAN LAKE 8420 18.8 23.8 79 22.7 21.7 105 THUMB DIVIDE 7980 17.0 16.0 106 19.9 23.1 86 TWO OCEAN PLATEAU 9360 31.2 27.2 115 30.2 34.0 89 WHISKEY CREEK 6800 16.1 16.3 99 21.3 24.4 87 WHITE MILL 8700 24.1 26.1 92 23.1 31.8 73 WOLVERINE 7650 6.5 9.5 68 10.6 14.7 72 ----- ----- Basin wide percent of average 91 87 WIND RIVER BURROUGHS CREEK 8750 17.1 13.8 124 19.3 18.9 102 COLD SPRINGS 9630 12.3 7.5 164 14.7 12.6 117 DEER PARK 9700 -M -M * 24.4 -M * HOBBS PARK 10100 19.1 17.4 110 17.5 16.7 105 LITTLE WARM 9620 12.7 11.6 109 15.9 15.7 101 SOUTH PASS 9040 17.6 17.9 98 20.9 19.9 105 ST. LAWRENCE ALT 8620 11.6 6.0 193 12.7 12.0 106 TOGWOTEE PASS 9580 25.5 27.8 92 26.6 31.3 85 TOWNSEND CREEK 8700 13.2 9.8 135 16.7 14.9 112 ----- ----- Basin wide percent of average 115 102 BIGHORN BASIN BALD MTN. 9375 22.8 23.4 97 20.4 20.1 101 BEAR TRAP MEADOW 7900 6.6 5.2 127 11.5 10.1 114 BLACKWATER 9780 22.5 25.3 89 20.4 20.1 101 BONE SPRINGS DIV 9350 19.4 18.3 106 19.8 17.5 113 EVENING STAR 9200 23.8 30.2 79 27.0 25.3 107 GRAVE SPRINGS 8550 12.8 -M * 13.9 11.8 118 KIRWIN 9550 13.8 11.5 120 15.8 12.8 123 MARQUETTE 8760 14.8 8.6 172 16.3 12.7 128 MIDDLE POWDER 7760 13.0 14.4 90 13.4 14.2 94 OWL CREEK 8975 8.6 3.9 221 9.6 7.7 125 POWDER RIVER PASS 9480 14.1 10.9 129 16.1 14.1 114 SHELL CREEK 9580 16.9 16.7 101 13.8 15.3 90 SYLVAN LAKE 8420 18.8 23.8 79 22.7 21.7 105 SYLVAN ROAD 8120 8.1 9.0 90 15.4 18.1 85 TIMBER CREEK 7950 9.6 6.2 155 12.7 9.4 135 YOUNTS PEAK 8350 16.2 18.3 89 16.7 18.8 89 ----- ----- Basin wide percent of average 101 106 SHOSHONE RIVER BLACKWATER 9780 22.5 25.3 89 20.4 20.1 101 EVENING STAR 9200 23.8 30.2 79 27.0 25.3 107 KIRWIN 9550 13.8 11.5 120 15.8 12.8 123 MARQUETTE 8760 14.8 8.6 172 16.3 12.7 128 SYLVAN LAKE 8420 18.8 23.8 79 22.7 21.7 105 SYLVAN ROAD 8120 8.1 9.0 90 15.4 18.1 85 YOUNTS PEAK 8350 16.2 18.3 89 16.7 18.8 89 ----- ----- Basin wide percent of average 93 104 POWDER-TONGUE BEAR TRAP MEADOW 7900 6.6 5.2 127 11.5 10.1 114 BONE SPRINGS DIV 9350 19.4 18.3 106 19.8 17.5 113 BURGESS JUNCTION 7880 13.3 13.3 100 15.0 13.8 109 CLOUD PEAK RESERVOIR 9860 19.2 17.4 110 19.7 16.3 121 DOME LAKE 8880 -M 14.9 * 16.3 15.8 103 GRAVE SPRINGS 8550 12.8 -M * 13.9 11.8 118 HANSEN SAWMILL 8760 9.8 7.2 136 13.5 9.8 138 MIDDLE POWDER 7760 13.0 14.4 90 13.4 14.2 94 POWDER RIVER PASS 9480 14.1 10.9 129 16.1 14.1 114 SUCKER CREEK 8880 13.8 13.6 101 16.7 15.8 106 TIE CREEK 6870 8.1 -M * 16.3 13.2 123 ----- ----- Basin wide percent of average 109 113 BELLE FOURCHE BLIND PARK 6890 5.6 10.3 54 14.0 13.0 108 NORTH RAPID CREEK 6130 7.3 -M * 11.8 -M * WARREN PEAK 6520 10.9 10.3 106 12.4 9.8 127 ----- ----- Basin wide percent of average 80 116 UPPER N. PLATTE RIVER COLUMBINE 9400 19.0 23.0 83 25.3 27.4 92 DIVIDE PEAK 8800 19.5 20.2 97 22.5 26.4 85 ELK RIVER 8700 15.9 17.8 89 22.7 21.5 106 JOE WRIGHT 10120 23.4 24.5 96 27.1 29.2 93 NORTH FRENCH CREEK 10100 33.6 28.9 116 32.5 27.1 120 OLD BATTLE 10000 35.8 37.3 96 38.7 34.6 112 SOUTH BRUSH CREEK 8400 5.7 11.5 50 14.4 19.7 73 TOWER 10500 53.3 50.3 106 45.0 41.8 108 WEBBER SPRINGS 9200 21.8 27.0 81 28.4 29.5 96 WILLOW CREEK PASS 9540 9.2 13.5 68 9.7 14.8 66 ----- ----- Basin wide percent of average 93 98 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.2 28.9 87 24.6 22.9 107 CASPER MTN. 7900 12.4 18.3 68 15.0 17.8 84 DEADMAN HILL 10220 16.3 18.6 88 17.0 20.2 84 DEER PARK 9700 -M -M * 24.4 -M * LAPRELE CREEK 8320 7.4 7.7 96 12.7 14.1 90 RENO HILL 8400 12.4 14.2 87 13.7 21.8 63 ROACH 9700 16.2 18.1 90 19.3 24.9 78 SAND LAKE 10080 30.8 36.6 84 27.2 23.9 114 SOUTH PASS 9040 17.6 17.9 98 20.9 19.9 105 WINDY PEAK 7840 6.6 8.4 79 10.9 11.7 93 ----- ----- Basin wide percent of average 86 91 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 8.1 7.1 114 17.2 17.9 96 DIVIDE PEAK 8800 19.5 20.2 97 22.5 26.4 85 OLD BATTLE 10000 35.8 37.3 96 38.7 34.6 112 SANDSTONE RS 8150 11.6 11.9 97 21.5 22.1 97 WHISKEY PARK 8950 30.1 30.0 100 31.1 32.8 95 ----- ----- Basin wide percent of average 99 98 UPPER GREEN RIVER BIG SANDY OPENING 9100 13.7 14.5 94 13.9 18.1 77 BLIND BULL SUM 8650 25.1 25.8 97 20.9 26.4 79 EAST RIM DIVIDE 7930 13.2 14.9 89 13.3 16.9 79 ELKHART PARK G.S. 9400 12.8 14.4 89 15.3 17.8 86 GROS VENTRE SUMMIT 8775 12.4 14.7 84 14.9 17.7 84 KENDALL R.S. 7740 12.0 11.5 104 16.7 17.3 97 LOOMIS PARK 8240 -M 15.8 * 19.0 21.0 90 NEW FORK LAKE 8340 10.6 9.7 109 12.4 16.1 77 SNIDER BASIN 8250 13.6 13.9 98 14.0 16.9 83 SPRING CREEK DIVIDE 9000 24.9 29.5 84 24.2 30.3 80 TRIPLE PEAK 8500 20.7 25.7 81 24.2 34.3 71 ----- ----- Basin wide percent of average 91 81 LOWER GREEN RIVER HAMS FORK 7840 8.0 5.7 140 13.0 14.9 87 HEWINTA 9500 11.0 6.7 164 17.2 15.7 110 HICKERSON PARK 9150 12.6 4.3 293 14.8 11.7 126 HOLE-IN-ROCK 9150 8.7 3.8 229 12.9 11.7 110 INDIAN CREEK 9425 25.8 29.5 87 21.7 28.7 76 KELLEY R.S. 8180 14.9 16.0 93 18.3 20.9 88 STEEL CREEK PARK 10100 20.1 18.5 109 21.3 15.4 138 ----- ----- Basin wide percent of average 120 100 UPPER BEAR RIVER BUG LAKE 7950 20.6 17.5 118 23.5 22.0 107 HAYDEN FORK 9400 13.3 8.2 162 23.5 22.2 106 KELLEY R.S. 8180 14.9 16.0 93 18.3 20.9 88 LILY LAKE 9050 14.6 10.3 142 20.5 17.4 118 MONTE CRISTO 8960 31.5 27.4 115 29.5 29.4 100 SALT RIVER SUMMIT 7600 14.4 11.9 121 19.9 18.8 106 TRIAL LAKE 9960 24.9 24.8 100 26.3 27.4 96 ----- ----- Basin wide percent of average 116 102 ----------------------------------------------------------------------------- -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.