Runoff from snowmelt caused some southeast Minnesota river flooding to occur in late April along the Mississippi River. The flooding continued into early May.
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.
Runoff from snowmelt caused some southeast Minnesota river flooding to occur in late April along the Mississippi River. The flooding continued into early May.
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 Apr 25, 1:45 AM CST, 10 minutes earlier.
Area Forecast Discussion National Weather Service La Crosse WI 245 AM CDT Wed Apr 25 2018 .SHORT TERM...(Today through Friday) Issued at 245 AM CDT Wed Apr 25 2018 Quiet weather continues today with high pressure over the area. Even despite slightly cooler air behind the frontal passage, plenty of sunshine along with a very dry airmass over the region will allow temps to climb into the upper 50s to mid 60s. An elongated positively tilted upper trough and associated cold front will approach on Thursday. The combination of weakening large scale forcing as the system approaches and a continued dry background airmass with little substantive moisture return suggests only lower end rain chances with the front. Kept just some very low end pops in for Thursday afternoon and evening with the NAM/GFS/ECMWF all indicating little in the way of precip. It should be another mild day with highs in the 60s and possibly around 70 in some of the valley locations with 925 mb temps back up into the 10- 13C range ahead of the front. Another upper shortwave trough dropping into the northern Great Lakes on Friday will drop a secondary cold front through keeping a seasonable airmass in place through the start of the weekend. Higher shower chances look to be over eastern WI closer to the shortwave and surface low. .LONG TERM...(Friday night through Tuesday) Issued at 245 AM CDT Wed Apr 25 2018 Upper ridging will gradually push eastward from the plains during the weekend with southwest flow developing over the area by early next week. A dry weekend is on tap as surface ridging occupies much of the central US. Temps will trend upward from Saturday into Sunday as the surface high slides south and east and return southerly flow begins to develop. Low-level warm/moist advection will continue into early next week with gusty southerly winds ahead of low pressure in the lee of the Rockies. Highs should at least be up into the 70s early next week with lows in the 50s. Although models differ on the details, a more active pattern is expected to develop late in the period through with increasing shower/storm chances. && .AVIATION...(For the 06Z TAFS through 06Z Wednesday evening) Issued at 1151 PM CDT Tue Apr 24 2018 Good VFR expected overnight thru Wed evening as high pressure and a deep, dry airmass build over the area. Any clouds thru 26.06z looking to be sct cirrus. Winds to be generally northerly at less than 10kts thru mid day Wed, becoming NW thru the afternoon, then light/variable into Wed night with the center of the night nearby/ overhead. && .HYDROLOGY... Issued at 245 AM CDT Wed Apr 25 2018 A flood warning remains in effect for the Yellow River at Necedah with minor flooding into late this week. See the latest flood statement for more information. Minor flooding is possible along portions of the Mississippi over the next several days as snowmelt runoff continues to progress through the river system. See the latest hydrologic outlooks (ESF) for more information. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. IA...None. && SHORT TERM...JM LONG TERM...JM AVIATION.....RRS HYDROLOGY...JM
Hazardous Weather Outlook National Weather Service La Crosse WI 515 AM CDT Tue Apr 24 2018 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-251200- 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- 515 AM CDT Tue Apr 24 2018 This Hazardous Weather Outlook is for portions of southeast Minnesota...northeast Iowa and southwest into central Wisconsin. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Snow melt runoff will lead to rises on area rivers and streams with minor flooding possible along some rivers over the next week. Those with river interests should pay close attention to water levels and forecasts. .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 snowmelt pushed the Mississippi River out of its banks in Wabasha. The flooding continued into early May which is when the crest occurred.
Runoff from snowmelt pushed the Mississippi River out of its banks in Winona. The flooding continued into early May which is when the crest occurred.
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, April 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: 749288, 749289.