Minor river flooding occurred along the Trempealeau River in early March. Above normal temperatures in late February into early March caused snowmelt runoff to push the Trempealeau River out of its banks at Dodge (Trempealeau County).
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The episode as NWS ARX wrote it up.
Minor river flooding occurred along the Trempealeau River in early March. Above normal temperatures in late February into early March caused snowmelt runoff to push the Trempealeau River out of its banks at Dodge (Trempealeau 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 Mar 1, 11:25 PM CST, 35 minutes earlier.
Area Forecast Discussion National Weather Service La Crosse WI 1125 PM CST Thu Mar 1 2018 .SHORT TERM...(Tonight through Friday Night) Issued at 222 PM CST Thu Mar 1 2018 GOES-16 Visible this afternoon showing clouds departing the area with mostly sunny conditions prevailing. Despite cold air advection today, early March sunshine was helping temperatures with readings as of 2 pm in the middle 30s to the upper 40s. For tonight, high pressure settles overhead for clear/quiet conditions with lows temperatures bottoming out in the teens and lower 20s. May have to watch for some fog as the lower boundary layer is fairly moist from snow melt. This would be mainly over areas of southeast MN into north central WI where some snowpack remains. Besides a few passing mid-level clouds, a mild Friday is on tap for the area as a mid-level ridge builds in from the west. Plan on highs in the upper 30s to the upper 40s. Lows Friday night are expected to be in the 20s. .LONG TERM...(Saturday through Thursday) Issued at 222 PM CST Thu Mar 1 2018 Mid-level ridging/surface warm air advection will produce very mild conditions this weekend with highs Saturday and Sunday in the middle 40s to middle 50s. Will have to watch for a slight chance of light rain across the western fringes of the forecast area Sunday as moisture transport increases ahead of low pressure moving out of the Rockies/Plains. Rain chances increase Sunday night into Monday as the occluded low moves out of the Plains toward the Upper Mississippi River Valley region. Could see a little bit of snow mixed in with the rain northeast of I-94 late Sunday night into Monday morning. Will have to watch for the possibility of heavier rainfall in what looks to be a trowal signature with wide open moisture tap from the Gulf of Mexico. Precipitable waters increase into the 1/2 to 3/4 inch range during the day Monday. This could lead to some localized ponding of water on frozen subsurface along with some more within bank river rises. Otherwise, looking a bit cooler but still somewhat mild conditions with highs in the upper 30s to the middle 40s. Plan on rain mixing with/transitioning to light snow Monday night through Tuesday as the stacked low drifts through the area. Could see some minor accumulations but impacts look minimal at this time. Will keep an eye on it. Some lingering light snow is still possible Monday morning, but should shut off Monday afternoon as highs pressure builds in from the Northern Plains. This high pressure maintains control through Thursday for a return to quiet/dry conditions. Otherwise, near normal temperatures expected Wednesday and Thursday with highs in the 30s. && .AVIATION...(For the 06Z TAFS through 06Z midnight Friday night) Issued at 1125 PM CST Thu Mar 1 2018 Winds to become light/variable/calm across the area overnight as a sfc high pressure ridge continues to build east across the area. Generally good VFR conditions expected at locations where snow cover is minimal or non-existent. Where snow cover remains, evening dew points are in the lower 20s and lows are forecast to fall into the mid/upper teens, some BR is expected to form. Continued with an MVFR mention for KRST in the 08-15z time period. Some concerns for BR at KLSE in the MS river valley, but confidence not high as the dew point was already near the expected low. Once any BR would dissipate by mid morning Fri, good VFR with mainly sct-bkn mid clouds and light SE winds expected for late morning thru Fri evening. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. IA...None. && SHORT TERM...DAS LONG TERM....DAS AVIATION.....RRS
Hazardous Weather Outlook National Weather Service La Crosse WI 248 PM CST Thu Mar 1 2018 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-021200- 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- 248 PM CST Thu Mar 1 2018 This Hazardous Weather Outlook is for portions of southeast Minnesota...northeast Iowa and southwest into central Wisconsin. .DAY ONE...Tonight Melting snow will lead to mainly within bank rises on some area rivers and streams. Ice jams are also possible for rivers that are ice-covered. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Melting snow will lead to mainly within bank rises on some area rivers and streams. Ice jams are also possible for rivers that are ice-covered. A storm system will spread rain into the area Sunday night into Monday. The rain is expected to mix with or change to light snow Monday night through Tuesday. This additional rainfall is expected to produce some more rises on area rivers and streams. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. JAM/DAS
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Runoff from snowmelt pushed the Trempealeau River out of its banks in Dodge. The river crested around a half foot above the flood stage at 9.63 feet.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2018Every state in 2018This day in weather historyWarnings in Wisconsin, March 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: 742857.