September 4, 2026

This is the region carrying the most today, and it is the second day in a row it has done so. Two separate outlooks cover much of the same ground.

The Storm Prediction Center has a slight risk of severe thunderstorms for Friday across the upper Ohio Valley into the southern Mid-Atlantic. The named population centers inside that area include Baltimore, Washington, Virginia Beach, and Pittsburgh. A slight risk is the second of five steps and means scattered severe storms are expected rather than isolated ones. Forecasters describe the main hazard plainly: damaging wind gusts, with the storms intensifying through the afternoon and into the evening.

The Weather Prediction Center separately holds a slight risk of excessive rainfall over the upper Ohio Valley and the central Appalachians through Friday morning, with a marginal risk continuing over the Mid-Atlantic through Saturday morning. Forecasters point to repeating convection over the western part of that area, which is the pattern that produces flash flooding: not one heavy storm but several crossing the same ground in sequence.

Delaware, Maryland, Virginia, the District of Columbia, Pennsylvania, and West Virginia all carry active National Weather Service alerts this morning, with Maryland and Virginia holding the most at six each.

Two actions cover most of this. The first is a driving decision. Do not drive into water across a road, which is the National Weather Service's Turn Around, Don't Drown guidance. Mountain and valley roads in West Virginia and western Pennsylvania are where water crosses a road with the least warning. The second is that damaging wind is the day's named hazard, so anything light in the yard that you would rather not chase is worth bringing in before the afternoon.

If wind takes your power out and you run a generator, operate it outdoors only, at least 20 feet from the house, with the exhaust pointed away from windows, doors, and vents. Working carbon monoxide alarms belong on every level of the home and outside sleeping areas, and they should be tested monthly. If a carbon monoxide alarm sounds, get outside first, then call 911. That guidance is the Consumer Product Safety Commission's.

No large uncontained wildfires are burning in the region. Nationally the wildfire preparedness level stands at 5, its highest step, with 84 large uncontained fires and 20,245 personnel assigned. The year to date total is 52,626 fires and 8,265,751 acres, which is 126 percent of the ten year average for fires and 163 percent for acres. Those figures come from the National Interagency Fire Center report dated September 2, so they are one to two days behind this morning.

No grid emergencies or water system disruptions are reported across the six jurisdictions this morning. Scattered outages are a reasonable expectation on a day with a named damaging wind risk, and utilities generally restore them within hours rather than days.

Ground across the upper Ohio Valley and the central Appalachians is wetter than usual after several days of repeated rainfall, which is why the Weather Prediction Center's risk area sits where it does. Wet ground both sheds water faster and holds trees less firmly, so the wind and the rain risks compound each other rather than sitting side by side.

No public health advisories specific to the region were confirmed this run. 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.

The pattern breaks down over the weekend. The Weather Prediction Center's outlook keeps a marginal risk of excessive rainfall over the Appalachians and the Mid-Atlantic into Saturday, then shifts the more organized moisture west toward the Southwest early next week as tropical moisture from Hurricane Marie moves inland well away from this region.

The larger seasonal item is the one that is not happening. The National Hurricane Center reports no tropical cyclones in the Atlantic and no expected formation for seven days. For a region whose hurricane exposure runs through October, mostly as inland flooding and wind from a weakening storm rather than as a coastal landfall, that is a genuine opening.

Two things are worth doing with it. Flood insurance policies generally carry a waiting period before they take effect, so a policy bought during a quiet week is the one that is in force during an active one, and standard homeowner policies do not cover flood. If you have had water in a basement before, this is the week to price it rather than the week after.

The second is the trees. Late summer storms in this region take down limbs onto power lines more often than they take down anything else. If you have a limb over a driveway or a service line that you have been meaning to look at, the quiet stretch after this system passes is when to deal with it.