Elevation (ft) 2470 2460 2450 2440 2430 2420 2410 2400 2390 2380 2370 2360 2350 2340 2330 2320 2310 2300 2290 Lake Koocanusa Elevation - Probability Chart 2280 2270 The data presented in this graph are provisional and are intended to provide an estimate of Libby Dam forebay elevation (Lake Koocanusa). 2260 2250 75th percentile means that on that day, 75 percent of the traces were below this value. The median points indicate the values such that half of the traces were above 2240 and half were below. 2230 Bars Indicate 5th and 95th percentiles 2220 http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=lydm8 2210
40 35 30 Libby Dam Outflow - Probability Chart The data presented in this graph are provisional and are intended to provide an estimate of outflow from Libby Dam. 75th percentile means that on that day, 75 percent of the traces were below this value. The median points indicate the values such that half of the traces were above and half were below http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=kbdm8 Bars Indicate 5th and 95th percentiles exeedances 25 Flow (kcfs) 20 15 10 5 0
05/02/17 Elevation (ft) 2470 2465 2460 2455 2450 2445 2440 2435 2430 2425 2420 2415 2410 2405 2400 2395 2390 2385 2380 2375 2370 2365 2360 2355 2350 2345 2340 2335 2330 2325 2320 2315 2310 2305 2300 Libby Dam Reservoir Elevations - Probability Chart The data presented in this graph is provisional and is intended to provide an estimate of elevations of Lake Koocanusa. The lines indicate projected elevations for the specified dates. A 30 percent Probability of Exceedance on the June 15th line means that 30 percent of the traces showed the reservoir elevation at or above that level on June 15th. The data presented in this graph is provisional and is intended to provide an estimate of The elevations River Forecast of Lake Koocanusa. Center public site for Libby Dam Forecasts is: http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=lydm8 The lines indicate projected elevations for the specified dates. A 30 percent Probability of Exceedance on the June 15th line means that 30 percent of the traces showed the reservoir elevation at or above that level on June 15th. http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=lydm8 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Probability of Exceedence 5/31/2017 6/30/2017 7/31/2017 8/31/2017 9/30/2017 Elevation 2454'
70 Bonners Ferry Stage 65 60 55 Elevation (ft) 50 45 40 35 The data presented in this graph are provisional and are intended to provide an estimate of river stages at Bonners Ferry. 75th percentile means that on that day, 75 percent of the traces were below this value. The median points indicate the values such that half of the traces were above and half were below. The River Forecast Center public site for Bonners Ferry Forecasts is: http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=bfei1 Flood Stage Bars Indicate 5th and 95th percentiles 30
1770 Maximum April-August Bonners Ferry Stage - Probability Chart 1768 1766 1764 Bonners Ferry Stage (ft) 1762 1760 1758 1756 1754 1752 The data presented in this graph is provisional and is intended to provide an estimate of the maximum river stage at Bonners Ferry. The vertical lines indicate probabilities for the maximum stage this season at Bonners Ferry. For example, the line at 20% intersects with the curve at an elevation which is exceeded in 20% of the traces (model runs). A flat tail indicates that many runs have forecast peaks lower than an already observed peak. The River Forecast Center public site for Bonners Ferry Forecasts is: http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=bfei1 Maximum Bonners Ferry Elevation 1750 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Probability of Exceedence
85 Libby Dam Inflow- Probability Chart Flow (kcfs) 80 75 70 65 60 55 50 45 40 The data presented in this graph are provisional and are intended to provide an estimate of inflow to Libby Dam. 75th percentile means that on that day, 75 percent of the traces were below this value. The median points indicate the values such that half of the traces were above and half were below http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=kbdm8 Bars Indicate 5th and 95th percentiles exeedances 35 30 25 20 15 10 5 0