textproduct: Duluth

KEY MESSAGES

- A few sprinkles are possible this afternoon among the daytime clouds today. Clearing tonight may lead to areas of dense fog.

- The next chance for showers and storms will be Monday night through Tuesday. Severe storms are possible particularly Tuesday afternoon with the passage of a cold front.

- Seasonal, dry conditions return mid next week.

DISCUSSION

Issued at 225 PM CDT Sat Aug 22 2026

Diurnal cumulus clouds occurring this afternoon will continue, and some of these clouds may produce sprinkles, particularly in the Minnesota Arrowhead. Breezy northwest winds will gradually lighten toward evening as surface high pressure settles over the region. For tonight, mostly clear skies and light winds will allow for radiational cooling. Patchy fog will develop after midnight, with best chances for areas of dense fog in the Iron Range.

Sunday will bring pleasant and quiet weather across the area with mostly sunny skies as surface high pressure remains in control. Cool low temperatures in the 40s are expected overnight. Moving into Monday, shortwave ridging aloft will maintain dry conditions through most of the daylight hours. Moisture will begin returning later in the day as an upper-level low approaches from the northwest.

Elevated CAPE with a warm front will lead to chances for showers and storms Monday night into early Tuesday. The environment will be less conducive for convection Tuesday morning as warm, moist air continues to be advected into the region. Tuesday afternoon and evening, a cold front will move through and will help convection redevelop for eastern portions of the Northland. Some storms could also be severe as instability maximizes with sufficient wind shear ahead of the front.

Showers and non-severe thunderstorms will remain possible into Wednesday as cyclonic flow lingers behind the departing system. Precipitation will gradually taper off from west to east as the low pressure area shifts into the Great Lakes region.

High pressure and northwest flow aloft return for the second half of the work week, bringing a return to dry conditions across the Northland for Thursday and Friday. Precipitation chances remain below fifteen percent through the end of the period.

AVIATION /18Z TAFS THROUGH 18Z SUNDAY/

Issued at 1228 PM CDT Sat Aug 22 2026

Diurnal cumulus clouds will be present through much of the afternoon into the evening with smoke aloft and patchy smoke at the surface occasionally reducing visibilities at INL, HIB, and BRD to MVFR. Tonight, fog is expected with areas of dense fog possible at HIB. IFR to LIFR visibilities and ceilings are possible with the fog. Winds will be gusty today, up to 25 kts throughout the afternoon before decreasing this evening.

MARINE /FOR NEARSHORE WATERS OF WESTERN LAKE SUPERIOR/

Issued at 225 PM CDT Sat Aug 22 2026

Northwest winds of 5 to 15 knots with gusts to 20 knots will continue this afternoon on western Lake Superior before easing tonight. Waves will remain around 1 to 2 feet or less. Light and variable winds are expected for Sunday. No marine headlines or thunderstorm threats are expected through Monday.

For the open water discussion, refer to the NWS Marquette Area Forecast Discussion at weather.gov/mqt.

FIRE WEATHER

Issued at 225 PM CDT Sat Aug 22 2026

Breezy northwest winds this afternoon will gust up to 20 to 25 mph with minimum relative humidity values dipping into the 30 to 45 percent range. Winds weaken significantly on Sunday, but minimum relative humidity will drop a bit lower to 30 to 40 percent. A few spots could dip below 30 percent. Relative humidity remains low Monday before moisture increases midweek, when chances for scattered showers and storms return.

See the Fire Weather Forecast product for a more thorough breakdown of fire weather conditions.

DLH WATCHES/WARNINGS/ADVISORIES

MN...None. WI...None. MARINE...None.