Marine Weather and Tide Forecast for Dennison, MN

DISCUSSION
Issued at 314 AM CDT Sun Aug 16 2026

Overall, not a lot of changes in the forecast from previous forecast packages. A somewhat progressive weather pattern with chances of showers and storms across the area Monday evening/night, with another shot of showers/storms Tuesday evening. Temperatures will hover right around the seasonal average through the period.

TODAY AND MONDAY

After FROPA early this morning, much drier air will infiltrate the area from the northwest with DP temps dropping back into the upper 50s this afternoon/evening. That said, today looks quite pleasant with high temperatures in the upper 70s to around 80 degrees with decreasing cloud coverage through the day.

TUESDAY THROUGH SATURDAY

On Monday, pleasant weather conditions will continue through most of the day with high temperatures in the low 80s. The next mid/upper level piece of energy will lead to isolated to scattered showers and storms Monday night into Tuesday morning. SW low level flow will increase through the day on Tuesday, allowing for better moisture and instability to advect in across the southern half of MN. This coupled with sufficient forcing associated with southeastward advancing cold front will promote an increase in shower and storm chances Tuesday evening/night. Current guidance has the focus for activity across southern MN where the best moisture and instability resides, along with better timing/advancement of the aforementioned cold front.

Thereafter, the flattened upper level high pressure over southern half of CONUS will shift westward over the southern Rockies and Four Corners Region. This will induce more amplified NW flow aloft across MN through the second half of the week. Quiet and fair weather conditions will resume with low-end chances of rain Thursday afternoon/evening. Temperatures through the remainder of the work week and into the weekend will hover around 80 degrees.

AVIATION /18Z TAFS THROUGH 00Z TUESDAY/
Issued at 1245 PM CDT Sun Aug 16 2026

VFR conditions through this evening with BKN/OVC stratocumulus dissipating by sunset. Patchy mist is possible overnight, but reductions to visibility are really only expected across western Wisconsin at RNH & EAU. At least IFR visibility looks likely at EAU with sub-1SM visibility possible. Northwest winds gust to around 20 kts through the afternoon with speeds dropping below 5 kts & the direction becoming more westerly tonight.

KMSP...No additional concerns.

/OUTLOOK FOR KMSP/ TUE...VFR. Chc MVFR/-SHRA. Wind SW to NW 5-10kts.
WED...VFR. Wind NW 5-10kts.
THU...VFR. Wind NW 5-10kts.

MPX WATCHES/WARNINGS/ADVISORIES
MN...None.
WI...None.