Harrison, MI Weather Forecast
Macomb County, Michigan
Seven-day outlook
43–68°F across the weekThe week runs between 45° and 68°, with today the warmest day of it. There is no real trend across it: one day looks much like the next. Today is the wettest day, peaking near 40%. 4 of the 7 days stay dry.
Forecasts come from the National Weather Service's own computer models, and current conditions from the nearest reporting weather station. Both are served through the weather API. A forecast is guidance, not a warning, and anything the Weather Service has actually issued is on the live map.
The written summaries on this page are generated from the forecast data above, not by a meteorologist. Each sentence is a reading of the same numbers you can see, and no forecaster has reviewed them.
About the Harrison forecast
Harrison sits at 42.5871°N, 82.8172°W in Macomb County, Michigan. The forecast above is drawn for that point from the National Weather Service's own computer models: a seven-day outlook, and a finer-grained one covering the next eighteen hours where it reaches, and the radar and alert panels show what the Weather Service has out over the area right now.
- County
- Macomb County
- Coordinates
- 42.5871°N, 82.8172°W
- Population
- 23,846 · 2023 estimate
- Land area
- 14.248 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Harrison, and the forecast is for that location, not for every address inside the city limits, and a large city can have real weather differences from one side to the other.
How well can the network see Harrison?
The nearest Doppler radar is KDTX (Detroit, MI), 34 miles to the WNW. A WSR-88D's lowest routine scan sits half a degree above horizontal, and the earth curves away beneath it, so by the time that beam reaches Harrison its center is about 2,200 ft above ground. That is comfortably inside the useful range. The lowest scan passes low enough over Harrison to show rotation in the part of a storm where tornadoes actually form. Harrison is closer to its radar than 64% of US cities.
The closest instrument actually measuring the air is KMTC · Selfridge ANGB on the ASOS/AWOS network, 1.5 miles away. Close enough that its readings are, for practical purposes, the conditions in town.
Beam height is the standard 4/3-earth approximation for the 0.5° scan and assumes normal refraction; it is where the center of the beam is, not its edges, and unusual temperature profiles bend it. Radar siting from the NWS WSR-88D network, station positions from the Michigan observing network as of this build.
Forecasts near Harrison
- Mount Clemens, MI3 mi
- Clinton, MI5 mi
- Chesterfield, MI6 mi
- Fraser, MI7 mi
- St. Clair Shores, MI8 mi
- Macomb, MI8 mi
- New Baltimore, MI8 mi
- Roseville, MI8 mi
Elsewhere in Michigan
DetroitGrand RapidsWarrenSterling HeightsAnn ArborLansingAll Michigan forecasts →