After several heavy rain events in June across the Upper Midwest, floodwaters worked down the Mississippi River. Flooding occurred in late June at Wabasha (Wabasha County) and Winona (Winona County).
Every event with a place to put it. Tap one for its entry below.
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.
After several heavy rain events in June across the Upper Midwest, floodwaters worked down the Mississippi River. Flooding occurred in late June at Wabasha (Wabasha County) and Winona (Winona County).
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 Jun 21, 5:03 PM CST, 7 minutes earlier.
Area Forecast Discussion National Weather Service La Crosse WI 603 PM CDT Thu Jun 21 2018 .SHORT TERM...(Tonight through Friday) Issued at 250 PM CDT Thu Jun 21 2018 A closed low continued to slowly sink southward across southwest Iowa and into northwest Missouri today. Associated band of light to moderate rainfall on the north side continued to impact the forecast area throughout the day, but was narrowing somewhat by the early afternoon. Dry east/northeasterly winds should continue to erode away at the showers through the evening. Meanwhile, a line of storms fired along the cold front associated with the low and will move north along with the front into this evening. Not expecting these storms to get into the forecast area though, given lack of instability from all day cloud cover and precipitation, and overall southern movement of the low. Most of the rain should be out of the forecast area by mid-morning on Friday as the center of low pressure will be over southern Illinois/Indiana, though could see some lingering showers across far southern Wisconsin into eastern Iowa. Otherwise, another day with the northern half of the forecast area being warmer than the southern half due to cloud cover, with highs ranging from the lower 70s south of Interstate 90 to the upper 70s north of Interstate 90. .LONG TERM...(Friday night through Thursday) Issued at 250 PM CDT Thu Jun 21 2018 Much needed drying takes place Friday night into Saturday as that closed low continues to move east of the region and fills. Very weak interim area of high pressure builds in with high temperatures right around seasonal normals in the upper 70s/lower 80s. Showers and a slight chance of thunderstorms creep back in late Saturday night into Sunday as a weak mid-level trough rotates southeast through the area. Look for highs in the upper 70s to lower 80s. On/off shower and isolated thunderstorm chance will be seen Monday through Thursday with the best chances centered around the Tuesday/Tuesday night time frame as a fairly vigorous mid-level trough/closed low rotates across the region from the Northern Plains. && .AVIATION...(For the 00Z TAFS through 00Z Friday evening) Issued at 603 PM CDT Thu Jun 21 2018 Light showers continue across the area in the weak zone of frontogenesis in the 1000-700 mb layer on the north side of the upper level low that was over northern Missouri. As the upper level low moves southeast, the frontogenesis will also move south and weaken which will allow the showers to end at both airports this evening. Even with the light rain, conditions are VFR and this should continue through the night with the ceilings gradually going up before the clouds scatter out Friday morning. Some concern for fog development overnight with lots of low level moisture in place along with light winds. Forecast soundings from the 21.21Z RAP suggest the winds just above the surface will be at or above 10 knots through the night which should be strong enough to prevent much fog from developing. && .HYDROLOGY... Issued at 250 PM CDT Thu Jun 21 2018 Periods of light to moderate rainfall will continue into the overnight hours before coming to an end for most of the area by mid-morning on Friday. The main impact has been rises on area rivers and streams, with the most recent being mainly across southeast Minnesota and northeast Iowa. In addition, river levels across western Wisconsin will remain elevated, with minor flooding expected along portions of the Mississippi River from rainfall in past days. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. IA...None. && SHORT TERM...CA LONG TERM...DAS AVIATION...04 HYDROLOGY...CA
Hazardous Weather Outlook National Weather Service La Crosse WI 401 AM CDT Thu Jun 21 2018 IAZ008>011-018-019-029-030-MNZ094>096-WIZ053>055-061-221215- Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Mower-Fillmore-Houston-Vernon-Crawford-Richland-Grant- 401 AM CDT Thu Jun 21 2018 This Hazardous Weather Outlook is for portions of northeast Iowa...southeast Minnesota and southwest Wisconsin. .DAY ONE...Today and Tonight Widespread rainfall is expected with isolated thunderstorms possible. Rainfall amounts up to 1 to 2 inches will lead to rises on rivers with ponding of water possible in poor drainage areas. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Isolated thunderstorms are possible on Sunday, but severe weather is not expected. Additional thunderstorms are possible Monday night through Wednesday. It is too early to determine any possible severe weather risk. .SPOTTER INFORMATION STATEMENT... Rainfall reports would be appreciated. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. MNZ079-086>088-WIZ017-029-032>034-041>044-221215- Wabasha-Dodge-Olmsted-Winona-Taylor-Clark-Buffalo-Trempealeau- Jackson-La Crosse-Monroe-Juneau-Adams- 401 AM CDT Thu Jun 21 2018 This Hazardous Weather Outlook is for portions of southeast Minnesota into central Wisconsin. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Isolated thunderstorms are possible on Sunday, but severe weather is not expected. Additional thunderstorms are possible Monday night through Wednesday. It is too early to determine any possible severe weather risk. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled.
The national radar mosaic for the moment the first event began.
2 flood. Local standard time, as filed.
Runoff from heavy rain events pushed the Mississippi River out of its banks in Wabasha. The river crested over a foot above the flood stage at 13.23 feet on the 23rd.
Runoff from heavy rain events pushed the Mississippi River out of its banks in Winona. The river crested around a half foot above the flood state at 13.56 feet on the 24th.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Minnesota in 2018Every state in 2018This day in weather historyWarnings in Minnesota, June 2018
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: 765514, 765515.