453 FXUS63 KDLH 281728 AFDDLHArea Forecast Discussion National Weather Service Duluth MN 1228 PM CDT Sun Sep 28 2025
.KEY MESSAGES...
- Dry again today with near-critical fire weather conditions due to low relative humidity.
- May need to watch for an abrupt increase in northeast winds Monday afternoon.
- High pressure continues with only a small chance of precipitation returning this weekend.
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.DISCUSSION... Issued at 142 AM CDT Sun Sep 28 2025
Get ready for a stretch of beautiful early-fall weather across the Northland as a large area of high pressure settles in for the entire week. Were looking at an extended period of dry and sunny conditions with temperatures gradually warming to levels that are above normal for this time of year, a pattern that should hold steady right into the beginning of October. The main exception to this quiet weather will be a push of cooler air off Lake Superior on Monday afternoon and evening, which will bring a quick cooldown and some gusty northeast winds, especially for areas near the Twin Ports. With the steady drying trend all week, fire weather conditions may become a concern. While there is a slight chance some moisture could move into the region on Thursday, confidence in any rainfall is low. Looking ahead to next weekend, while some forecast models hint at a pattern change, this type of stable and pleasant weather often sticks around longer than expected.
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.AVIATION /18Z TAFS THROUGH 18Z MONDAY/... Issued at 1228 PM CDT Sun Sep 28 2025
VFR conditions prevail through the TAF period with high pressure over the region. South to southwest winds with gusts to 15-20 kt continue for northeastern Minnesota terminals through early this evening before weakening tonight. Can`t rule out some LLWS at INL/HIB later this evening and tonight due to the development of a roughly 35 knot southwesterly low-level jet, but this threat should drop off towards 29.07Z to 29.10Z. Winds remain light out of the south to southeast into daytime Monday, though onshore northeast winds off of Lake Superior towards late Monday afternoon and evening could locally enhance winds at DLH.
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.MARINE /FOR NEAR SHORE WATERS OF WESTERN LAKE SUPERIOR/... Issued at 142 AM CDT Sun Sep 28 2025
For mariners along the North Shore, expect breezy southwest winds to develop this afternoon with gusts up to 25 knots. However, be prepared for an abrupt and significant reversal of conditions on Monday afternoon. A developing pressure gradient will cause winds to rapidly switch to the northeast, with gusts of 25 to 30 knots spreading down the North Shore and across the head of the lake. This sudden shift will generate hazardous, choppy seas and bring a surge of much colder air to the Duluth- Superior area. Conditions are expected to deteriorate very quickly, so mariners are urged to take all necessary precautions to avoid being caught off guard by this rapid change.
For the open water discussion, refer to the NWS Marquette Area Forecast Discussion at weather.gov/mqt.
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.DLH WATCHES/WARNINGS/ADVISORIES... MN...None. WI...None. MARINE...Small Craft Advisory until 7 PM CDT this evening for LSZ140>143.
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DISCUSSION...Wolfe AVIATION...Rothstein MARINE...Wolfe
NWS DLH Office Area Forecast Discussion