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~ WEEKLY FLOOD OUTLOOK - JUNE 7,1996 The Weekly Flood Outlook presents the Colorado Flood Task Force's findings regarding the 1996 snowmelt flood threat. This Outlook was prepared because of hot weather expected for the next few days. 1) MAJOR BASIN SNOWPACK AS OF JUNE 7.1996 Based on SNOTEL readings on June 7, 1996 the snowpack in Colorado's major river basins, as a percent of average snowpack, is presented in Table 1. Table 1 MISSISSIPPIIMISSOURI RIVER BASIN North PlatteILaramie Rivers 129% 133% 111% 117% 13.6 South Platte River 155% 155% 156% 135% 5.8 Arkansas River 93% 106% 106% 0% 0.0 COLORADO RIVER BASIN Yampa/White Rivers 120% 137% 116% 130% 10.5 Upper Colorado River 128% 138% 99% 78% 2.9 Gunnison River 101% 113% 57% 51% 1.3 Southwestern Colorado 68% 61% 1% 1% 0.1 RIO GRANDE BASIN Rio Grande 59% 49% 1% 0% 0.0 2) WEATHER FORECAST A. 7-10 day forecast The National Weather Service (NWS) provided a short-term weather forecast for the next 7 to 10 days. The NWS is predicting maximum daily temperatures in the high 80' s and low 90' s during the next week or so for Denver and Grand Junction. Precipitation for the week should be negligible, but there is a chance of very minor showers during the week. B. 15 day forecast Henz Meteorological Services provided a weather forecast for the next two weeks or so. There appears to be a very strong hot and dry weather pattern that will settle into the state causing rapid snowmelt. There is very little chance of thunderstorm activity or general rain in the mountain watersheds during the next 10 to 14 days. The general forecast is presented in table 2. Table 2 M'wki~ 1 2 M'~jti,i\.~ijdJil.i!~ Hot and d Hot and d After these two week of hot and dry weather, it is expected that most of the snowpack will have melted and that the threat of snowmelt flooding will largely have passed for 1996. 1 '.