Northeast Iowa started April with some river flooding along portions of the Mississippi River. The flooding was the result of runoff from snow that melted in late March.
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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.
Northeast Iowa started April with some river flooding along portions of the Mississippi River. The flooding was the result of runoff from snow that melted in late March.
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 1, 9:41 PM CST, 1 hour 49 minutes earlier.
Area Forecast Discussion National Weather Service La Crosse WI 1041 PM CDT Wed Apr 1 2020 .SHORT TERM...(This evening through Thursday) Issued at 259 PM CDT Wed Apr 1 2020 At 2 PM, skies were mainly sunny east of the Mississippi River and ranged from partly sunny to mostly cloudy across the remainder of the area. These clouds are remnants of a shortwave trough which moved across this area earlier in the day. Precipitation chances return beginning Thursday. Better chances for precipitation are further west into central Minnesota and in far northern Wisconsin. A short wave disturbance and associated warm air advection could produce some showers before the main system passes on Friday. .LONG TERM...(Thursday night through Wednesday) Issued at 259 PM CDT Wed Apr 1 2020 From Thursday night into Friday evening, a slow moving trough will move east through the region. This system will produce rain through much of this time period. Rainfall amounts will range from 0.25 to a 0.50 inches. As colder air moves into the region on Friday night, the rain will gradually transition to snow. At this time, little, if any, snow accumulation is expected. High temperatures will range from the mid-50s to lower 60s on Thursday and range from the lower 40s to upper 50s on Friday. High pressure will build into the region for the weekend. It will provide mainly dry weather. High temperatures will range from the mid-40s to mid-50s on Saturday and from the mid-50s to lower 60s on Sunday. The next chance of rain will be from Sunday night through Monday night. Due to saturation issues, the models continue to struggle on the onset of this rain. && .AVIATION...(For the 06Z TAFS through 06Z Thursday night) Issued at 1040 PM CDT Wed Apr 1 2020 Scattered to broken VFR altocumulus clouds will move over the KRST/KLSE sites tonight into Thursday in advance of low pressure over the Central Plains and a cold front moving out of the Dakotas. Expect clouds to thicken and lower through Thursday, becoming MVFR at KRST by early Thursday evening along with the onset of rain. KLSE is expected to stay dry Thursday evening as the rain remains just west of the Mississippi River. Otherwise, plan on prevailing southeast winds through the period. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. IA...None. && SHORT TERM...Boyne LONG TERM...Boyne AVIATION...DAS
Hazardous Weather Outlook National Weather Service La Crosse WI 238 PM CDT Wed Apr 1 2020 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-021100- 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- 238 PM CDT Wed Apr 1 2020 This Hazardous Weather Outlook is for portions of southeast Minnesota...northeast Iowa and southwest into central Wisconsin. .DAY ONE...This Afternoon and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday No hazardous weather is expected at this time. However, some rises are expected along the Mississippi River into next week. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. Boyne
The national radar mosaic for the moment the first event began.
2 flood. Local standard time, as filed.
Runoff from melted snow pushed the Mississippi River out of its banks in McGregor. The river crested over two feet above the flood stage at 18.38 feet on April 7th.
Runoff from melted snow pushed the Mississippi River out of its banks in Guttenberg. The river crested almost two feet above the flood stage at 16.76 feet on April 8th.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2020Every state in 2020This day in weather historyWarnings in Iowa, April 2020
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: 885975, 885976.