397 SRUS46 KPQR 181330 RVMPQR Hydrologic Statement National Weather Service Portland OR 630 AM PDT Mon May 18 2026 WAZ040-18630- 630 AM PDT Mon May 18 2026 Current status of reservoirs on the Lewis River, updated 630 AM Mon, May 18 2026. RESERVOIR CURRENT POOL ELEV FULL POOL Swift Reservoir 996 1000 FT Yale Lake 479 490 FT Lake Merwin 236 240 FT As of 630 AM PDT, Mon May 18, 2026, the remaining aggregate storage for refill at Merwin, Yale, and Swift reservoirs is 19 feet. This product is updated hourly on the NWS Portland webpage at: www.wrh.noaa.gov/total_forecast/getprod.php?wfo=pqr&sid=PQR&pil=RVM or http://go.usa.gov/x97zc Additional hydrologic information can be viewed at: water.weather.gov/ahps2/index.php?wfo=pqr $$  581 SRUS43 KKRF 181335 RVMKRF NWS MISSOURI BASIN RIVER FORECAST CENTER PLEASANT HILL MO 1335Z Mon 18 May 2026 : ==> These forecasts include obsd precip & 48 hours of QPF <== : FORECAST GROUP IS MISSOURI TRIBUTARY FLOWS :Scotland SD - James River :Flow Forecast in KCFS .ER SCOS2 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 1.095/ 1.091/ 1.088/ 1.084 .E1 1.081/ 1.076/ 1.071/ 1.066 .E2 1.061/ 1.055/ 1.048/ 1.042 .E2 1.035/ 1.028/ 1.020/ 1.017 .E3 1.014/ 1.011/ 1.007/ 1.004 .E3 1.000/ 0.996/ 0.993/ 0.989 .E4 0.985/ 0.982/ 0.979/ 0.975 .E4 0.972/ 0.969/ 0.966/ 0.963 .E5 0.961/ 0.958/ 0.955/ 0.952 .E5 0.949/ 0.947/ 0.944/ 0.941 :Akron IA - Big Sioux River :Flow Forecast in KCFS .ER AKRI4 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 1.167/ 1.280/ 1.398/ 1.507 .E1 1.581/ 1.594/ 1.545/ 1.468 .E2 1.391/ 1.318/ 1.251/ 1.193 .E2 1.143/ 1.098/ 1.058/ 1.024 .E3 0.997/ 0.975/ 0.957/ 0.941 .E3 0.928/ 0.915/ 0.903/ 0.890 .E4 0.878/ 0.865/ 0.853/ 0.841 .E4 0.830/ 0.819/ 0.809/ 0.800 .E5 0.790/ 0.780/ 0.770/ 0.760 .E5 0.749/ 0.739/ 0.728/ 0.717 :Turin IA - Little Sioux River :Flow Forecast in KCFS .ER TURI4 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 1.579/ 1.550/ 1.529/ 1.528 .E1 1.554/ 1.602/ 1.660/ 1.702 .E2 1.730/ 1.737/ 1.737/ 1.735 .E2 1.729/ 1.718/ 1.704/ 1.687 .E3 1.667/ 1.646/ 1.624/ 1.601 .E3 1.578/ 1.554/ 1.532/ 1.510 .E4 1.488/ 1.468/ 1.449/ 1.431 .E4 1.414/ 1.398/ 1.383/ 1.369 .E5 1.356/ 1.343/ 1.331/ 1.319 .E5 1.307/ 1.295/ 1.284/ 1.273 :Louisville NE - Platte River :Flow Forecast in KCFS .ER LOUN1 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 7.555/ 7.149/ 7.140/ 7.060 .E1 6.990/ 7.006/ 7.040/ 7.299 .E2 7.595/ 7.646/ 7.421/ 7.021 .E2 6.569/ 6.160/ 5.830/ 5.566 .E3 5.352/ 5.184/ 5.052/ 4.948 .E3 4.870/ 4.822/ 4.784/ 4.743 .E4 4.698/ 4.656/ 4.641/ 4.791 .E4 5.108/ 5.142/ 4.681/ 4.354 .E5 4.656/ 4.929/ 4.583/ 4.257 .E5 4.544/ 4.813/ 4.473/ 4.142 :Hamburg IA - Nishnabotna River :Flow Forecast in KCFS .ER HMBI4 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 2.227/ 2.317/ 2.708/ 3.105 .E1 3.065/ 2.788/ 2.617/ 2.549 .E2 2.521/ 2.463/ 2.356/ 2.220 .E2 2.075/ 1.950/ 1.852/ 1.781 .E3 1.734/ 1.702/ 1.681/ 1.666 .E3 1.654/ 1.644/ 1.635/ 1.627 .E4 1.619/ 1.612/ 1.604/ 1.597 .E4 1.590/ 1.583/ 1.576/ 1.568 .E5 1.561/ 1.555/ 1.548/ 1.542 .E5 1.536/ 1.530/ 1.524/ 1.518 :Graham MO - Nodaway River :Flow Forecast in KCFS .ER GRMM7 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 4.125/ 4.064/ 6.897/ 12.724 .E1 16.953/ 19.125/ 17.160/ 13.965 .E2 11.018/ 9.117/ 7.507/ 5.975 .E2 4.887/ 4.087/ 3.436/ 2.877 .E3 2.392/ 1.998/ 1.709/ 1.491 .E3 1.317/ 1.176/ 1.061/ 0.967 .E4 0.889/ 0.825/ 0.772/ 0.728 .E4 0.691/ 0.660/ 0.634/ 0.613 .E5 0.594/ 0.578/ 0.565/ 0.553 .E5 0.543/ 0.534/ 0.526/ 0.518 :Sharps Station MO - Platte River :Flow Forecast in KCFS .ER SSTM7 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 8.787/ 9.634/ 10.428/ 11.893 .E1 13.042/ 13.327/ 13.104/ 12.840 .E2 12.784/ 12.576/ 12.635/ 13.295 .E2 14.777/ 16.706/ 18.594/ 20.003 .E3 20.668/ 20.438/ 19.372/ 17.440 .E3 14.876/ 11.904/ 9.006/ 6.448 .E4 4.547/ 3.128/ 2.257/ 1.843 .E4 1.408/ 1.021/ 0.746/ 0.592 .E5 0.526/ 0.498/ 0.482/ 0.468 .E5 0.456/ 0.446/ 0.436/ 0.428 :DeSoto KS - Kansas River :Flow Forecast in KCFS .ER DSOK1 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 1.745/ 1.828/ 4.652/ 16.919 .E1 33.069/ 42.558/ 45.325/ 43.270 .E2 39.342/ 35.476/ 32.020/ 28.754 .E2 25.158/ 21.206/ 17.268/ 13.836 .E3 11.271/ 9.477/ 8.210/ 7.253 .E3 6.470/ 5.802/ 5.224/ 4.727 .E4 4.306/ 3.959/ 3.675/ 3.440 .E4 3.240/ 3.062/ 2.899/ 2.747 .E5 2.604/ 2.470/ 2.346/ 2.233 .E5 2.131/ 2.042/ 1.966/ 1.902 :Sumner MO - Grand River :Flow Forecast in KCFS .ER SNZM7 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 56.646/ 58.453/ 58.268/ 57.456 .E1 58.557/ 63.397/ 71.197/ 77.992 .E2 81.537/ 81.472/ 78.992/ 75.321 .E2 71.282/ 67.188/ 63.054/ 58.744 .E3 53.991/ 48.637/ 42.749/ 36.079 .E3 27.550/ 12.328/ 3.861/ 3.170 .E4 2.871/ 2.620/ 2.471/ 2.353 .E4 2.271/ 2.205/ 2.150/ 2.104 .E5 2.064/ 2.028/ 1.995/ 1.965 .E5 1.937/ 1.911/ 1.886/ 1.862 :Prairie Hill MO - Chariton River :Flow Forecast in KCFS .ER PRIM7 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 6.032/ 6.678/ 6.985/ 8.579 .E1 12.009/ 14.862/ 15.373/ 15.569 .E2 15.828/ 15.676/ 14.221/ 11.826 .E2 8.562/ 6.375/ 5.720/ 5.394 .E3 4.956/ 4.458/ 4.066/ 3.752 .E3 3.485/ 3.250/ 3.039/ 2.842 .E4 2.656/ 2.480/ 2.311/ 2.147 .E4 1.987/ 1.831/ 1.678/ 1.528 .E5 1.380/ 1.233/ 1.089/ 0.945 .E5 0.804/ 0.664/ 0.527/ 0.390 :St Thomas MO - Osage River :Flow Forecast in KCFS .ER STTM7 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 9.769/ 11.649/ 15.696/ 16.836 .E1 16.098/ 13.427/ 11.033/ 9.302 .E2 7.876/ 6.759/ 5.881/ 5.172 .E2 4.549/ 3.788/ 3.259/ 2.874 .E3 2.572/ 2.137/ 1.928/ 1.822 .E3 1.702/ 1.329/ 1.170/ 1.106 .E4 1.097/ 1.090/ 1.085/ 1.080 .E4 1.077/ 1.074/ 1.071/ 1.068 .E5 1.059/ 1.030/ 1.018/ 1.012 .E5 1.011/ 1.009/ 1.008/ 1.007 :Rich Fountain MO - Gasconade River :Flow Forecast in KCFS .ER RIFM7 20260518 Z DH1800/DC202605181325/QRIFWZZ/DIH06 .E1 1.844/ 3.462/ 5.755/ 8.024 .E1 9.060/ 9.370/ 9.041/ 8.014 .E2 7.016/ 5.918/ 4.939/ 4.176 .E2 3.496/ 2.955/ 2.551/ 2.252 .E3 2.032/ 1.872/ 1.754/ 1.666 .E3 1.600/ 1.549/ 1.510/ 1.478 .E4 1.451/ 1.429/ 1.411/ 1.394 .E4 1.379/ 1.365/ 1.353/ 1.341 .E5 1.329/ 1.318/ 1.307/ 1.297 .E5 1.286/ 1.276/ 1.266/ 1.256 $$