Porter, MI Weather Forecast
Cass County, Michigan
Seven-day outlook
37–69°F across the weekThe week runs between 41° and 69°, with Tuesday the warmest day of it. There is no real trend across it: one day looks much like the next. Wednesday is the wettest day, peaking near 46%. 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 Porter forecast
Porter sits at 41.8215°N, 85.8265°W in Cass 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
- Cass County
- Coordinates
- 41.8215°N, 85.8265°W
- Population
- 3,922 · 2023 estimate
- Land area
- 51.523 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Porter, 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 Porter?
The nearest Doppler radar is KIWX (Fort Wayne, IN), 33 miles to the SSE. 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 Porter its center is about 2,000 ft above ground. That is comfortably inside the useful range. The lowest scan passes low enough over Porter to show rotation in the part of a storm where tornadoes actually form. Porter is closer to its radar than 67% of US cities.
The closest instrument actually measuring the air is KEKM · Elkhart Muni on the ASOS/AWOS network, 11 miles away. Near enough to be representative on most days, though a summer thunderstorm can soak one and miss the other entirely.
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 Porter
- Mason, MI6 mi
- Fabius, MI10 mi
- Elkhart, IN11 mi
- Jefferson, MI12 mi
- Ontwa, MI12 mi
- Middlebury, IN12 mi
- Three Rivers, MI13 mi
- LaGrange, MI13 mi
Elsewhere in Michigan
DetroitGrand RapidsWarrenSterling HeightsAnn ArborLansingAll Michigan forecasts →