Active Weather
Minnesota is the one state in this region with anything active. The National Weather Service public alert feed, read at about 1 AM Eastern this morning, shows two active alerts in Minnesota and none in Illinois, Indiana, Michigan, Ohio, or Wisconsin.
The context for those alerts is rainfall. The Weather Prediction Center's excessive rainfall discussion, issued at 12:58 AM Eastern today, holds a slight risk of excessive rainfall from Iowa northward into Minnesota through this morning. Slight is the second of four levels. It means scattered flash flooding is expected somewhere inside the outlined area rather than merely possible, which is the step up from marginal that is worth paying attention to.
The discussion notes that afternoon and evening convection persisted over Iowa and northward, with rainfall rates falling on soils that are already saturated. Saturated ground is the multiplier here: the same inch of rain that soaks in during a dry August runs straight off in a wet September.
For Tuesday, the Weather Prediction Center extends a marginal risk across central Minnesota toward the Missouri River, and for Wednesday a marginal risk covers the Upper Mississippi Valley into the Upper Great Lakes, which reaches Wisconsin and Michigan at the edge.
The Storm Prediction Center's overnight outlook, issued at 7:40 PM Central Sunday, draws no severe thunderstorm risk area in this region.
Infrastructure
No large wildfires are burning in the six states, according to the National Interagency Fire Center situation report dated Sunday September 6 at 7:30 AM Mountain time. That is a change from earlier in the season, when Minnesota carried active incidents.
That report puts the national wildfire preparedness level is 4 on a five-step scale, according to the National Interagency Fire Center situation report dated Sunday September 6 at 7:30 AM Mountain time. That report counts 75 uncontained large fires nationally, with 53,165 fires and 8,302,657 acres burned so far this year, running at 125 percent and 158 percent of the ten-year average.
No grid emergencies or water system disruptions are reported. The Federal Emergency Management Agency's declarations page could not be read this run, so this brief reports no change either way on open declarations.
Public Health
No heat alerts, air quality alerts, or boil-water advisories were identified across the six states.
One note for Minnesota and Wisconsin households on private wells: heavy rain and saturated ground are the conditions under which surface water can reach a shallow or poorly sealed wellhead. If your well is shallow, or the casing sits low, that is worth checking after a wet stretch rather than during one.
The Centers for Disease Control and Prevention's Health Alert Network archive could not be read this run, so this brief makes no claim about national health advisories in either direction.
Watch Item
The useful shape of this week is a series of low-end rain events rather than one large one. Slight risk in Minnesota today, marginal risk across central Minnesota Tuesday, marginal risk over the Upper Mississippi Valley and Upper Great Lakes Wednesday. Individually, none of these is a large event. Together, on ground that is already holding water, they are the pattern that fills basements.
The household work that matches this pattern is drainage rather than supplies. Downspouts that discharge at the foundation instead of away from it, window wells without covers, and a sump pump that has not been run since spring are the three things that turn an ordinary rain week into an interior problem. Running the sump pump takes a bucket of water and two minutes, and it tells you now what you would otherwise learn at 2 AM.
For anyone whose sump pump is the only thing between the basement and standing water, the follow-up question is what happens when the power goes out during the same storm that fills the pit. A battery backup unit answers that. A shop vacuum does not.
Looking further out, September in the Great Lakes is the transition month. Lake water is still warm, air masses are starting to arrive cold, and the difference between the two is what drives the first strong wind events of the season. Nothing in the current outlook points at one. It is simply the time of year to have the yard cleared of anything that becomes airborne.
Explore Today
How saturated ground changes what an ordinary rainfall does, and the drainage work that prevents most basement flooding.
What stops working first, including the sump pump, and how to cover the gap.
Storage, treatment, and what to do when a private well is exposed to surface water.