Runoff from heavy rains caused the Mississippi River to flood at McGregor (Clayton County) starting in late September. This flooding ended in early October.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS ARX wrote it up.
Runoff from heavy rains caused the Mississippi River to flood at McGregor (Clayton County) starting in late September. This flooding ended in early October.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS La Crosse, WI wrote its last area forecast discussion before the first event at Sep 30, 10:03 PM CST, 1 hour 57 minutes earlier.
Area Forecast Discussion National Weather Service La Crosse WI 1103 PM CDT Fri Sep 30 2016 .SHORT TERM...(This evening through Saturday) Issued at 251 PM CDT Fri Sep 30 2016 Latest water vapor imagery indicating upper level cut-off/closed low over the Ohio River Valley and shortwave ridge over the Northern and High Plains. Pieces of energy rotating around the upper level cut-off low is producing isolated/scattered showers over parts of eastern Wisconsin and Illinois per latest mosaic radar. The 30.12z GFS/NAM/ECMWF are in good agreement in lifting upper level closed/cut-off low into the Great Lakes Region tonight into Saturday. A series of impulses wrapping around the upper level cut-off low will continue to advect moisture into the area. Weak lift in association with the impulses and dry air over much of the forecast area...will inhibit the potential for showers across the forecast area. With the better chances mainly east of the Mississippi River and occurring late tonight into Saturday morning. .LONG TERM...(Saturday night through Friday) Issued at 251 PM CDT Fri Sep 30 2016 Upper level cut-off/closed low tracks into the eastern Great Lakes Region Saturday night and allows any isolated/scattered showers to be east of the forecast area. Then...upper level ridge amplifies/builds over the central United States/Great Lakes region and provides dry weather across the forecast area Sunday into Monday. Temperatures should warm into the 60s to around 70 degrees Monday. If skies clear over the forecast area Sunday night...there is the potential for fog formation in river valleys...as the 30.12z GFS/NAM bufkit soundings show inversion developing and deep layer light winds. At this time...have left mention of fog out of the forecast. Main forecast concerns are precipitation chances Tuesday night into Thursday. Considerable differences occur between the deterministic 30.12z GFS/ECMWF/GEM through the period...as the models differ on strength of the upper level ridge amplifying over the central United States Monday night/Tuesday and placement/timing of the upper level closed low/trough slowly moving into the Upper Midwest Tuesday night into Thursday. This will have impacts on timing of the shower/thunderstorm chances and how widespread the showers/thunderstorms will be across the forecast area Tuesday night into Thursday. The 30.12z GFS/ECMWF/GEM continue to show strong warm air advection out ahead of the upper level closed low/trough Tuesday and will provide above normal temperatures across the forecast area Tuesday. Slightly below normal temperatures are expected later in the week...as cooler air filters into the forecast area behind surface front/upper level trough. && .AVIATION...(For the 06Z TAFS through 06Z Saturday night) Issued at 1103 PM CDT Fri Sep 30 2016 VFR stratus remains over the TAF sites. However, easterly flow around low pressure in Indiana continued to bring moisture westward, with IFR ceilings at Viroqua and MVFR at Sparta. These lower ceilings will move into the TAF sites during the early morning hours as the easterly flow persists. Additionally we could see some MVFR BR impact the sites around sunrise. Cannot rule out a few light showers/drizzle as well during the BR time period, especially at KLSE. Daytime heating should help to mix out the BR and bring ceilings up to MVFR. Further increase to VFR is expected in the evening as dry air begins to flow in from the northeast. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. IA...None. && SHORT TERM...DTJ LONG TERM...DTJ AVIATION...AJ
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LA CROSSE WI 300 AM CDT FRI SEP 30 2016 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-011100- MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE- CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON- TAYLOR-CLARK-BUFFALO-TREMPEALEAU-JACKSON-LA CROSSE-MONROE-JUNEAU- ADAMS-VERNON-CRAWFORD-RICHLAND-GRANT- 300 AM CDT FRI SEP 30 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST IOWA... SOUTHEAST MINNESOTA...AND SOUTHWEST INTO CENTRAL WISCONSIN. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE WILL BE A CHANCE FOR THUNDERSTORMS TUESDAY NIGHT THROUGH WEDNESDAY NIGHT. IT DOES NOT APPEAR ANY SEVERE WEATHER WILL OCCUR...ALTHOUGH LIGHTNING ALWAYS POSES AT LEAST SOME RISK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED. .EMERGENCY MANAGEMENT COORDINATION... NO WEBINAR IS SCHEDULED. MW
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Runoff from heavy rains pushed the Mississippi River out of its banks at McGregor. The flooding began in late September and ended on October 1st.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2016Every state in 2016This day in weather historyWarnings in Iowa, October 2016
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 661831.