Elevation (ft) 2470 2460 2450 2440 2430 2420 2410 2400 2390 2380 2370 2360 2350 2340 2330 2320 2310 2300 2290 2280 2270 2260 2250 2240 2230 2220 Bars Indicate 5th and 95th percentiles Lake Koocanusa Elevation - Probability Chart The data presented in this graph are provisional and are intended to provide an estimate of Libby Dam forebay elevation (Lake Koocanusa). For the official short term forecast please refer to the River Forecast Center public site for Libby Dam Forecasts: 75th percentile means that on that day, 75 percent of the traces (forecast scenarios) were below this value. The median points indicate the values such that half of the traces were above and half were below. 2210 10/1 11/1 12/1 1/1 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/1
80 Libby Dam Inflow- Probability Chart Flow (kcfs) 75 70 65 60 55 50 45 40 35 The data presented in this graph are provisional and are intended to provide an estimate of Libby Dam inflow. For the official short term forecast please refer to the River Forecast Center public site for Libby Dam Forecasts: 75th percentile means that on that day, 75 percent of the traces (forecast scenarios) were below this value. The median points indicate the values such that half of the traces were above and half were below. Bars Indicate 5th and 95th percentiles exeedances 30 25 20 15 10 5 0 10/1 11/1 12/1 1/1 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/1
40 35 30 Libby Dam Outflow - Probability Chart The data presented in this graph are provisional and are intended to provide an estimate of Libby Dam outflow. For the official short term forecast please refer to the River Forecast Center public site for Libby Dam Forecasts: 75th percentile means that on that day, 75 percent of the traces (forecast scenarios) were below this value. The median points indicate the values such that half of the traces were above and half were below. Bars Indicate 5th and 95th percentiles exeedances 25 Flow (kcfs) 20 15 10 5 0 10/1 11/1 12/1 1/1 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/1
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. For the official short term forecast please refer to the River Forecast Center public site for Libby Dam Forecasts: 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. 5/31/2018 6/30/2018 7/31/2018 8/31/2018 Elevation 2454' 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Probability of Exceedence
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. For the official short term forecast please refer to the River Forecast Center public site for Bonners Ferry forecasts: http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=bfei1 75th percentile means that on that day, 75 percent of the traces (forecast scenarios) were below this value. The median points indicate the values such that half of the traces were above and half were below. Flood Stage Bars Indicate 5th and 95th percentiles 30 3/1 4/1 5/1 6/1 7/1 8/1
1772 Maximum April-August Bonners Ferry Stage - Probability Chart 1770 1768 1766 Bonners Ferry Stage (ft) 1764 1762 1760 1758 1756 1754 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 Flood Stage 1752 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Probability of Exceedence