FGUS53 KKRF 181536 RVFUMO RIVER FORECAST NWS MISSOURI BASIN RIVER FORECAST CENTER PLEASANT HILL MO 1536Z MON MAY 18 2026 : : THIS PRODUCT HAS PRELIMINARY DATA AND SUBJECT TO REVISION. : REFER TO YOUR LOCAL WFO FOR THE LATEST OFFICIAL RIVER FORECAST. : FORECAST GROUP IS UPRMO : ************************************************************** : *** This forecast includes projected snowmelt due to *** : *** forecasted 6-hour mean temperatures for next 15 days. *** : ************************************************************** : ==> This forecast includes obsd precip & 72 hours of QPF :________________________________________________________________ :MELROSE 7 S, MT - BIG HOLE RIVER HSA - TFX :MINOR FLOOD STAGE 6.0 FT FCST ISSUANCE STAGE 5.0 FT :MODERATE FLOOD STAGE 7.5 FT MAJOR FLOOD STAGE 8.0 FT :LATEST RIVER STAGE 3.6 FT AT 1515Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 3.8 / 3.7 / 3.7 / 3.7 : .ER MLRM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 3.6 / 3.6 / 3.6 .E2 : 0519 : / 3.5 / 3.5 / 3.5 / 3.4 .E3 : 0520 : / 3.4 / 3.4 / 3.4 / 3.3 .E4 : 0521 : / 3.3 / 3.3 / 3.3 / 3.3 .E5 : 0522 : / 3.3 / 3.3 / 3.3 / 3.3 .E6 : 0523 : / 3.3 / 3.3 / 3.3 / 3.3 .E7 : 0524 : / 3.3 / 3.3 / 3.3 / 3.4 .E8 : 0525 : / 3.4 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.00 / 0.00 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 15Z is 0.00 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.00 / 0.00 : 0520 / 0.00 / 0.00 / 0.00 / 0.01 : 0521 / 0.02 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.03 inches :MELROSE 7 S, MT - BIG HOLE RIVER HSA - TFX :LATEST RIVER DISCHARGE 2.790 KCFS AT 1415Z ON MAY 18 : .ER MLRM8 20260518 Z DC202605181536/DH18/QRIFFZZ/DIH6 :Flow Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 2.764 / 2.705 / 2.646 .E2 : 0519 : / 2.586 / 2.527 / 2.470 / 2.417 .E3 : 0520 : / 2.364 / 2.315 / 2.272 / 2.235 .E4 : 0521 : / 2.204 / 2.185 / 2.173 / 2.160 .E5 : 0522 : / 2.138 / 2.121 / 2.116 / 2.108 .E6 : 0523 : / 2.098 / 2.099 / 2.116 / 2.130 .E7 : 0524 : / 2.143 / 2.172 / 2.221 / 2.267 .E8 : 0525 : / 2.302 : :________________________________________________________________ :TWIN BRIDGES 5 N, MT - JEFFERSON RIVER HSA - TFX :MINOR FLOOD STAGE 10.0 FT FCST ISSUANCE STAGE 9.0 FT :MODERATE FLOOD STAGE 11.0 FT MAJOR FLOOD STAGE 12.0 FT :LATEST RIVER STAGE 5.4 FT AT 1515Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 5.4 / 5.4 / 5.4 / 5.3 : .ER TWIM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 5.3 / 5.3 / 5.3 .E2 : 0519 : / 5.3 / 5.3 / 5.2 / 5.2 .E3 : 0520 : / 5.1 / 5.1 / 5.1 / 5.0 .E4 : 0521 : / 5.0 / 5.0 / 5.0 / 4.9 .E5 : 0522 : / 4.9 / 4.9 / 4.9 / 4.9 .E6 : 0523 : / 4.9 / 4.9 / 4.9 / 4.9 .E7 : 0524 : / 4.9 / 4.9 / 4.9 / 5.0 .E8 : 0525 : / 5.0 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.00 / 0.00 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 15Z is 0.00 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.00 / 0.00 : 0520 / 0.00 / 0.00 / 0.00 / 0.03 : 0521 / 0.02 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.05 inches :TWIN BRIDGES 5 N, MT - JEFFERSON RIVER HSA - TFX :LATEST RIVER DISCHARGE 2.740 KCFS AT 1415Z ON MAY 18 : .ER TWIM8 20260518 Z DC202605181536/DH18/QRIFFZZ/DIH6 :Flow Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 2.717 / 2.683 / 2.662 .E2 : 0519 : / 2.633 / 2.606 / 2.558 / 2.506 .E3 : 0520 : / 2.458 / 2.413 / 2.369 / 2.332 .E4 : 0521 : / 2.304 / 2.279 / 2.258 / 2.245 .E5 : 0522 : / 2.231 / 2.222 / 2.212 / 2.202 .E6 : 0523 : / 2.193 / 2.189 / 2.191 / 2.196 .E7 : 0524 : / 2.203 / 2.218 / 2.242 / 2.267 .E8 : 0525 : / 2.304 : :________________________________________________________________ :THREE FORKS 3 NW, MT - JEFFERSON RIVER HSA - TFX :MINOR FLOOD STAGE 8.0 FT FCST ISSUANCE STAGE 7.0 FT :MODERATE FLOOD STAGE 8.5 FT MAJOR FLOOD STAGE 9.0 FT :LATEST RIVER STAGE 4.6 FT AT 1500Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 4.6 / 4.6 / 4.6 / 4.6 : .ER TFKM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 4.6 / 4.6 / 4.6 .E2 : 0519 : / 4.6 / 4.5 / 4.5 / 4.5 .E3 : 0520 : / 4.5 / 4.4 / 4.4 / 4.4 .E4 : 0521 : / 4.3 / 4.3 / 4.3 / 4.3 .E5 : 0522 : / 4.3 / 4.3 / 4.2 / 4.2 .E6 : 0523 : / 4.2 / 4.2 / 4.2 / 4.2 .E7 : 0524 : / 4.2 / 4.1 / 4.2 / 4.2 .E8 : 0525 : / 4.2 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.00 / 0.00 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 15Z is 0.00 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.00 / 0.00 : 0520 / 0.00 / 0.00 / 0.00 / 0.06 : 0521 / 0.03 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.09 inches :THREE FORKS 3 NW, MT - JEFFERSON RIVER HSA - TFX :LATEST RIVER DISCHARGE 2.570 KCFS AT 1400Z ON MAY 18 : .ER TFKM8 20260518 Z DC202605181536/DH18/QRIFFZZ/DIH6 :Flow Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 2.699 / 2.700 / 2.674 .E2 : 0519 : / 2.646 / 2.606 / 2.569 / 2.522 .E3 : 0520 : / 2.485 / 2.443 / 2.396 / 2.359 .E4 : 0521 : / 2.319 / 2.289 / 2.253 / 2.225 .E5 : 0522 : / 2.207 / 2.189 / 2.167 / 2.145 .E6 : 0523 : / 2.121 / 2.100 / 2.083 / 2.070 .E7 : 0524 : / 2.052 / 2.046 / 2.052 / 2.060 .E8 : 0525 : / 2.076 : :________________________________________________________________ :GALLATIN GATEWAY 7 S, MT - GALLATIN RIVER HSA - TFX :MINOR FLOOD STAGE 6.0 FT FCST ISSUANCE STAGE 5.0 FT :MODERATE FLOOD STAGE 7.0 FT MAJOR FLOOD STAGE 7.5 FT :LATEST RIVER STAGE 2.7 FT AT 1500Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 2.8 / 2.8 / 2.8 / 2.7 : .ER GLGM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 2.7 / 2.7 / 2.7 .E2 : 0519 : / 2.6 / 2.6 / 2.6 / 2.6 .E3 : 0520 : / 2.6 / 2.5 / 2.5 / 2.5 .E4 : 0521 : / 2.5 / 2.5 / 2.5 / 2.5 .E5 : 0522 : / 2.5 / 2.5 / 2.5 / 2.5 .E6 : 0523 : / 2.5 / 2.5 / 2.5 / 2.5 .E7 : 0524 : / 2.6 / 2.7 / 2.7 / 2.7 .E8 : 0525 : / 2.8 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.01 / 0.00 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 15Z is 0.01 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.00 / 0.00 : 0520 / 0.00 / 0.00 / 0.00 / 0.07 : 0521 / 0.09 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.16 inches :GALLATIN GATEWAY 7 S, MT - GALLATIN RIVER HSA - TFX :LATEST RIVER DISCHARGE 1.390 KCFS AT 1400Z ON MAY 18 : .ER GLGM8 20260518 Z DC202605181536/DH18/QRIFFZZ/DIH6 :Flow Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 1.472 / 1.449 / 1.426 .E2 : 0519 : / 1.404 / 1.382 / 1.360 / 1.344 .E3 : 0520 : / 1.327 / 1.311 / 1.295 / 1.279 .E4 : 0521 : / 1.265 / 1.265 / 1.278 / 1.282 .E5 : 0522 : / 1.281 / 1.284 / 1.283 / 1.274 .E6 : 0523 : / 1.272 / 1.284 / 1.293 / 1.293 .E7 : 0524 : / 1.348 / 1.436 / 1.428 / 1.440 .E8 : 0525 : / 1.530 : :________________________________________________________________ :LOGAN 1 W, MT - GALLATIN RIVER HSA - TFX :MINOR FLOOD STAGE 9.0 FT FCST ISSUANCE STAGE 8.0 FT :MODERATE FLOOD STAGE 10.0 FT MAJOR FLOOD STAGE 11.0 FT :LATEST RIVER STAGE 5.8 FT AT 1400Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 5.8 / 5.7 / 5.7 / 5.8 : .ER LOGM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 5.7 / 5.7 / 5.7 .E2 : 0519 : / 5.6 / 5.6 / 5.6 / 5.5 .E3 : 0520 : / 5.5 / 5.4 / 5.4 / 5.5 .E4 : 0521 : / 5.5 / 5.5 / 5.4 / 5.4 .E5 : 0522 : / 5.4 / 5.4 / 5.4 / 5.4 .E6 : 0523 : / 5.3 / 5.3 / 5.3 / 5.3 .E7 : 0524 : / 5.3 / 5.2 / 5.3 / 5.3 .E8 : 0525 : / 5.3 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.00 / 0.00 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 14Z is 0.00 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.00 / 0.00 : 0520 / 0.00 / 0.00 / 0.00 / 0.08 : 0521 / 0.10 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.18 inches :LOGAN 1 W, MT - GALLATIN RIVER HSA - TFX :LATEST RIVER DISCHARGE 1.210 KCFS AT 1400Z ON MAY 18 : .ER LOGM8 20260518 Z DC202605181536/DH18/QRIFFZZ/DIH6 :Flow Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 1.171 / 1.189 / 1.144 .E2 : 0519 : / 1.105 / 1.076 / 1.065 / 1.018 .E3 : 0520 : / 1.000 / 0.970 / 0.968 / 0.996 .E4 : 0521 : / 1.047 / 1.021 / 0.967 / 0.939 .E5 : 0522 : / 0.929 / 0.927 / 0.916 / 0.903 .E6 : 0523 : / 0.885 / 0.863 / 0.848 / 0.855 .E7 : 0524 : / 0.825 / 0.812 / 0.829 / 0.862 .E8 : 0525 : / 0.876 : :________________________________________________________________ :TOSTON 2 SE, MT - MISSOURI RIVER HSA - TFX :MINOR FLOOD STAGE 10.5 FT FCST ISSUANCE STAGE 8.5 FT :MODERATE FLOOD STAGE 11.0 FT MAJOR FLOOD STAGE 12.0 FT :LATEST RIVER STAGE 5.0 FT AT 1500Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 5.1 / 5.1 / 5.0 / 5.0 : .ER TOSM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 5.0 / 5.0 / 5.0 .E2 : 0519 : / 5.0 / 4.9 / 4.9 / 4.9 .E3 : 0520 : / 4.8 / 4.8 / 4.8 / 4.8 .E4 : 0521 : / 4.8 / 4.8 / 4.7 / 4.7 .E5 : 0522 : / 4.7 / 4.6 / 4.6 / 4.6 .E6 : 0523 : / 4.6 / 4.5 / 4.5 / 4.5 .E7 : 0524 : / 4.5 / 4.5 / 4.4 / 4.4 .E8 : 0525 : / 4.4 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.00 / 0.00 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 15Z is 0.00 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.00 / 0.00 : 0520 / 0.00 / 0.00 / 0.00 / 0.07 : 0521 / 0.06 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.13 inches :TOSTON 2 SE, MT - MISSOURI RIVER HSA - TFX :LATEST RIVER DISCHARGE 5.170 KCFS AT 1400Z ON MAY 18 : .ER TOSM8 20260518 Z DC202605181536/DH18/QRIFFZZ/DIH6 :Flow Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 5.012 / 4.994 / 4.983 .E2 : 0519 : / 4.938 / 4.883 / 4.822 / 4.765 .E3 : 0520 : / 4.694 / 4.634 / 4.578 / 4.542 .E4 : 0521 : / 4.544 / 4.547 / 4.505 / 4.431 .E5 : 0522 : / 4.361 / 4.311 / 4.276 / 4.236 .E6 : 0523 : / 4.191 / 4.140 / 4.089 / 4.042 .E7 : 0524 : / 4.008 / 3.962 / 3.933 / 3.924 .E8 : 0525 : / 3.942 : :________________________________________________________________ :ULM 6 E, MT - MISSOURI RIVER HSA - TFX :MINOR FLOOD STAGE 13.5 FT FCST ISSUANCE STAGE 11.5 FT :MODERATE FLOOD STAGE 15.0 FT MAJOR FLOOD STAGE 17.0 FT :LATEST RIVER STAGE 3.7 FT AT 1430Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 3.5 / 3.5 / 3.6 / 3.7 : .ER ULMM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 3.7 / 3.8 / 3.8 .E2 : 0519 : / 3.7 / 3.7 / 3.7 / 3.7 .E3 : 0520 : / 3.7 / 3.7 / 3.7 / 3.7 .E4 : 0521 : / 3.7 / 3.8 / 3.8 / 3.8 .E5 : 0522 : / 3.8 / 3.8 / 3.9 / 3.9 .E6 : 0523 : / 3.9 / 3.9 / 3.9 / 3.9 .E7 : 0524 : / 3.9 / 3.8 / 3.8 / 3.8 .E8 : 0525 : / 3.8 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.00 / 0.00 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 14Z is 0.00 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.02 / 0.01 : 0520 / 0.00 / 0.00 / 0.05 / 0.16 : 0521 / 0.05 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.29 inches :ULM 6 E, MT - MISSOURI RIVER HSA - TFX :LATEST RIVER DISCHARGE 4.200 KCFS AT 1430Z ON MAY 18 : .ER ULMM8 20260518 Z DC202605181536/DH18/QRIFFZZ/DIH6 :Flow Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 4.056 / 4.097 / 4.109 .E2 : 0519 : / 4.083 / 4.047 / 4.015 / 3.999 .E3 : 0520 : / 3.996 / 4.006 / 4.023 / 4.051 .E4 : 0521 : / 4.077 / 4.101 / 4.120 / 4.140 .E5 : 0522 : / 4.161 / 4.185 / 4.213 / 4.239 .E6 : 0523 : / 4.253 / 4.259 / 4.256 / 4.238 .E7 : 0524 : / 4.209 / 4.186 / 4.155 / 4.135 .E8 : 0525 : / 4.117 : :________________________________________________________________ :VAUGHN 3 SE, MT - SUN RIVER HSA - TFX :MINOR FLOOD STAGE 6.0 FT FCST ISSUANCE STAGE 5.0 FT :MODERATE FLOOD STAGE 8.0 FT MAJOR FLOOD STAGE 9.0 FT :LATEST RIVER STAGE 3.0 FT AT 1500Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 2.7 / 2.7 / 2.8 / 2.9 : .ER VAUM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 3.0 / 3.1 / 3.2 .E2 : 0519 : / 3.3 / 3.3 / 3.3 / 3.3 .E3 : 0520 : / 3.3 / 3.3 / 3.3 / 3.3 .E4 : 0521 : / 3.2 / 3.1 / 3.1 / 3.0 .E5 : 0522 : / 2.9 / 2.9 / 2.9 / 2.9 .E6 : 0523 : / 2.9 / 2.8 / 2.8 / 2.8 .E7 : 0524 : / 2.8 / 2.8 / 2.8 / 2.8 .E8 : 0525 : / 2.8 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.00 / 0.00 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 15Z is 0.00 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.01 / 0.00 : 0520 / 0.00 / 0.00 / 0.05 / 0.16 : 0521 / 0.04 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.26 inches :VAUGHN 3 SE, MT - SUN RIVER HSA - TFX :LATEST RIVER DISCHARGE 1.230 KCFS AT 1400Z ON MAY 18 : .ER VAUM8 20260518 Z DC202605181536/DH18/QRIFFZZ/DIH6 :Flow Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 1.183 / 1.364 / 1.536 .E2 : 0519 : / 1.640 / 1.687 / 1.698 / 1.711 .E3 : 0520 : / 1.725 / 1.720 / 1.671 / 1.587 .E4 : 0521 : / 1.475 / 1.348 / 1.228 / 1.129 .E5 : 0522 : / 1.061 / 1.020 / 1.004 / 0.996 .E6 : 0523 : / 0.984 / 0.974 / 0.968 / 0.958 .E7 : 0524 : / 0.942 / 0.935 / 0.919 / 0.912 .E8 : 0525 : / 0.902 : :________________________________________________________________ :FT BENTON, MT - MISSOURI RIVER HSA - TFX :MINOR FLOOD STAGE 13.5 FT FCST ISSUANCE STAGE 12.0 FT :MODERATE FLOOD STAGE 15.0 FT MAJOR FLOOD STAGE 17.0 FT :LATEST RIVER STAGE 2.4 FT AT 1430Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 2.5 / 2.4 / 2.4 / 2.4 : .ER FBNM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 2.3 / 2.4 / 2.4 .E2 : 0519 : / 2.5 / 2.6 / 2.6 / 2.6 .E3 : 0520 : / 2.6 / 2.6 / 2.6 / 2.6 .E4 : 0521 : / 2.6 / 2.6 / 2.6 / 2.6 .E5 : 0522 : / 2.6 / 2.5 / 2.5 / 2.5 .E6 : 0523 : / 2.5 / 2.5 / 2.5 / 2.5 .E7 : 0524 : / 2.5 / 2.5 / 2.5 / 2.5 .E8 : 0525 : / 2.5 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.02 / 0.05 / 0.11 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 14Z is 0.18 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.01 / 0.00 : 0520 / 0.00 / 0.00 / 0.04 / 0.14 : 0521 / 0.04 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.23 inches :FT BENTON, MT - MISSOURI RIVER HSA - TFX :LATEST RIVER DISCHARGE 5.860 KCFS AT 1430Z ON MAY 18 : .ER FBNM8 20260518 Z DC202605181536/DH18/QRIFFZZ/DIH6 :Flow Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 5.794 / 5.915 / 6.122 .E2 : 0519 : / 6.322 / 6.499 / 6.632 / 6.711 .E3 : 0520 : / 6.746 / 6.760 / 6.767 / 6.771 .E4 : 0521 : / 6.760 / 6.729 / 6.675 / 6.603 .E5 : 0522 : / 6.521 / 6.440 / 6.376 / 6.336 .E6 : 0523 : / 6.319 / 6.315 / 6.315 / 6.311 .E7 : 0524 : / 6.299 / 6.278 / 6.247 / 6.211 .E8 : 0525 : / 6.173 : :________________________________________________________________ :SHELBY 6 S, MT - MARIAS RIVER HSA - TFX :MINOR FLOOD STAGE 9.0 FT FCST ISSUANCE STAGE 8.0 FT :MODERATE FLOOD STAGE 13.0 FT MAJOR FLOOD STAGE 15.0 FT :LATEST RIVER STAGE 4.6 FT AT 1430Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 4.8 / 4.7 / 4.7 / 4.6 : .ER SHLM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 4.5 / 4.4 / 4.3 .E2 : 0519 : / 4.2 / 4.2 / 4.1 / 4.0 .E3 : 0520 : / 4.0 / 3.9 / 3.8 / 3.7 .E4 : 0521 : / 3.7 / 3.7 / 3.7 / 3.7 .E5 : 0522 : / 3.8 / 3.9 / 4.0 / 4.1 .E6 : 0523 : / 4.1 / 4.1 / 4.0 / 4.0 .E7 : 0524 : / 4.0 / 4.0 / 3.9 / 3.9 .E8 : 0525 : / 4.0 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.04 / 0.04 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 14Z is 0.08 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.01 / 0.00 : 0519 / 0.00 / 0.00 / 0.01 / 0.00 : 0520 / 0.00 / 0.03 / 0.09 / 0.13 : 0521 / 0.01 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.28 inches :SHELBY 6 S, MT - MARIAS RIVER HSA - TFX :LATEST RIVER DISCHARGE 1.540 KCFS AT 1430Z ON MAY 18 : .ER SHLM8 20260518 Z DC202605181536/DH18/QRIFFZZ/DIH6 :Flow Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 1.507 / 1.423 / 1.348 .E2 : 0519 : / 1.272 / 1.213 / 1.153 / 1.094 .E3 : 0520 : / 1.037 / 0.980 / 0.926 / 0.905 .E4 : 0521 : / 0.891 / 0.881 / 0.883 / 0.906 .E5 : 0522 : / 0.952 / 1.014 / 1.072 / 1.110 .E6 : 0523 : / 1.119 / 1.107 / 1.085 / 1.064 .E7 : 0524 : / 1.046 / 1.032 / 1.025 / 1.024 .E8 : 0525 : / 1.027 : :________________________________________________________________ :LANDUSKY 20 S, MT - MISSOURI RIVER HSA - TFX :MINOR FLOOD STAGE 27.0 FT FCST ISSUANCE STAGE 26.0 FT :MODERATE FLOOD STAGE 29.0 FT MAJOR FLOOD STAGE 33.0 FT :LATEST RIVER STAGE 14.6 FT AT 1500Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 14.4 / 14.6 / 14.7 / 14.7 : .ER LDKM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 14.7 / 14.6 / 14.4 .E2 : 0519 : / 14.3 / 14.2 / 14.1 / 14.0 .E3 : 0520 : / 14.0 / 14.0 / 14.0 / 14.1 .E4 : 0521 : / 14.2 / 14.2 / 14.3 / 14.4 .E5 : 0522 : / 14.4 / 14.4 / 14.4 / 14.5 .E6 : 0523 : / 14.4 / 14.4 / 14.4 / 14.4 .E7 : 0524 : / 14.3 / 14.3 / 14.2 / 14.2 .E8 : 0525 : / 14.2 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.02 / 0.01 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 15Z is 0.03 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.00 / 0.00 : 0520 / 0.00 / 0.00 / 0.02 / 0.01 : 0521 / 0.00 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.03 inches :________________________________________________________________ :HARLOWTON 1 SW, MT - MUSSELSHELL RIVER HSA - BYZ :MINOR FLOOD STAGE 7.0 FT FCST ISSUANCE STAGE 5.5 FT :MODERATE FLOOD STAGE Missing MAJOR FLOOD STAGE Missing :LATEST RIVER STAGE 3.5 FT AT 1400Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 3.6 / 3.6 / 3.5 / 3.5 : .ER HLWM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 3.5 / 3.4 / 3.4 .E2 : 0519 : / 3.4 / 3.3 / 3.3 / 3.3 .E3 : 0520 : / 3.3 / 3.3 / 3.3 / 3.3 .E4 : 0521 : / 3.3 / 3.3 / 3.2 / 3.2 .E5 : 0522 : / 3.2 / 3.2 / 3.2 / 3.2 .E6 : 0523 : / 3.3 / 3.3 / 3.3 / 3.3 .E7 : 0524 : / 3.2 / 3.2 / 3.2 / 3.2 .E8 : 0525 : / 3.2 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.00 / 0.00 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 14Z is 0.00 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.00 / 0.00 : 0520 / 0.00 / 0.00 / 0.01 / 0.10 : 0521 / 0.13 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.24 inches :________________________________________________________________ :SHAWMUT, MT - MUSSELSHELL RIVER HSA - BYZ :MINOR FLOOD STAGE 8.0 FT FCST ISSUANCE STAGE 6.0 FT :MODERATE FLOOD STAGE Missing MAJOR FLOOD STAGE Missing :LATEST RIVER STAGE 3.8 FT AT 1430Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 3.8 / 3.7 / 3.7 / 3.7 : .ER SHAM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 3.7 / 3.7 / 3.7 .E2 : 0519 : / 3.6 / 3.6 / 3.6 / 3.5 .E3 : 0520 : / 3.5 / 3.5 / 3.5 / 3.4 .E4 : 0521 : / 3.4 / 3.4 / 3.4 / 3.4 .E5 : 0522 : / 3.4 / 3.4 / 3.4 / 3.3 .E6 : 0523 : / 3.3 / 3.3 / 3.3 / 3.3 .E7 : 0524 : / 3.3 / 3.3 / 3.3 / 3.3 .E8 : 0525 : / 3.3 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.00 / 0.03 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 14Z is 0.03 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.00 / 0.00 : 0520 / 0.00 / 0.00 / 0.01 / 0.11 : 0521 / 0.15 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.27 inches :________________________________________________________________ :LAVINA 1 S, MT - MUSSELSHELL RIVER HSA - BYZ :MINOR FLOOD STAGE 9.5 FT FCST ISSUANCE STAGE 7.5 FT :MODERATE FLOOD STAGE Missing MAJOR FLOOD STAGE Missing :LATEST RIVER STAGE 2.7 FT AT 1430Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 2.6 / 2.6 / 2.7 / 2.7 : .ER LVNM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 2.6 / 2.6 / 2.6 .E2 : 0519 : / 2.6 / 2.6 / 2.6 / 2.5 .E3 : 0520 : / 2.5 / 2.5 / 2.4 / 2.4 .E4 : 0521 : / 2.4 / 2.4 / 2.3 / 2.3 .E5 : 0522 : / 2.3 / 2.3 / 2.3 / 2.3 .E6 : 0523 : / 2.2 / 2.2 / 2.2 / 2.2 .E7 : 0524 : / 2.2 / 2.2 / 2.2 / 2.2 .E8 : 0525 : / 2.1 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.00 / 0.00 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 14Z is 0.00 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.01 / 0.00 : 0520 / 0.00 / 0.00 / 0.02 / 0.13 : 0521 / 0.14 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.30 inches :________________________________________________________________ :ROUNDUP 2 SW, MT - MUSSELSHELL RIVER HSA - BYZ :MINOR FLOOD STAGE 10.0 FT FCST ISSUANCE STAGE 8.0 FT :MODERATE FLOOD STAGE 10.5 FT MAJOR FLOOD STAGE 11.0 FT :LATEST RIVER STAGE 2.5 FT AT 1400Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 2.5 / 2.5 / 2.5 / 2.5 : .ER RUPM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 2.6 / 2.6 / 2.5 .E2 : 0519 : / 2.5 / 2.5 / 2.5 / 2.5 .E3 : 0520 : / 2.4 / 2.4 / 2.4 / 2.4 .E4 : 0521 : / 2.3 / 2.3 / 2.3 / 2.2 .E5 : 0522 : / 2.2 / 2.2 / 2.2 / 2.1 .E6 : 0523 : / 2.0 / 2.0 / 1.9 / 1.9 .E7 : 0524 : / 1.8 / 1.8 / 1.8 / 1.8 .E8 : 0525 : / 1.7 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.00 / 0.00 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 14Z is 0.00 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.00 / 0.00 : 0520 / 0.00 / 0.00 / 0.01 / 0.11 : 0521 / 0.11 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.23 inches :________________________________________________________________ :MUSSELSHELL, MT - MUSSELSHELL RIVER HSA - BYZ :MINOR FLOOD STAGE 11.0 FT FCST ISSUANCE STAGE 9.0 FT :MODERATE FLOOD STAGE 11.5 FT MAJOR FLOOD STAGE 12.0 FT :LATEST RIVER STAGE 2.8 FT AT 1430Z ON MAY 18 :obs Stage / 18Z / 00Z / 06Z / 12Z : 0517 / 2.6 / 2.6 / 2.7 / 2.7 : .ER MUSM8 20260518 Z DC202605181536/DH18/HGIFFZZ/DIH6 :Stage Fcst / 12Z / 18Z / 00Z / 06Z .E1 : 0518 : / 2.8 / 2.8 / 2.9 .E2 : 0519 : / 2.9 / 2.9 / 2.9 / 2.9 .E3 : 0520 : / 2.9 / 2.9 / 2.9 / 2.8 .E4 : 0521 : / 2.8 / 2.8 / 2.8 / 2.7 .E5 : 0522 : / 2.7 / 2.6 / 2.6 / 2.6 .E6 : 0523 : / 2.4 / 2.4 / 2.4 / 2.4 .E7 : 0524 : / 2.3 / 2.3 / 2.3 / 2.2 .E8 : 0525 : / 2.2 :Local observed 6-hr basin-averaged precip(inches) (PAST 24 hrs): : / 18Z / 00Z / 06Z / 12Z : 0517 / 0.02 / 0.01 / 0.00 / 0.00 : :Local observed 24-hr basin-averaged precip total : QPE Total Ending May 18 at 14Z is 0.03 inches : :Local forecast 6-hr basin-averaged precip(inches) (NEXT 72 hrs): : / 12Z / 18Z / 00Z / 06Z : 0518 / 0.00 / 0.00 / 0.00 : 0519 / 0.00 / 0.00 / 0.00 / 0.00 : 0520 / 0.00 / 0.00 / 0.02 / 0.09 : 0521 / 0.10 : :Local forecast 72-hr basin-averaged precip total : QPF Total Ending May 21 0.21 inches :**************************************************************** :COMMENT : : :HSA - Hydrologic Service Area :WFO - Weather Forecast Office :TFX - NWS WFO Great Falls, Montana :BYZ - NWS WFO Billings, Montana :GGW - NWS WFO Glasgow, Montana :OBS - Observed :EST - Estimated :M - Missing :Stage Fcst - River Stage forecast including future precipitation :Flow Fcst - River Flow forecast including future precipitation :Precip - Precipitation :QPE - Observed radar estimated precipitation :QPF - Forecasted mean areal precipitation for local basin : : $$ :MBRFC cwh :...END of MESSAGE...