Marine Weather and Tide Forecast for Pepin, WI

DISCUSSION
Issued at 331 PM CDT Thu May 15 2025

Broken line of storms has fired along a cold front which is pushing into central Minnesota and western Wisconsin at this time. So far severe reports have been limited, although a few funnels/landspout-like tornadoes have been reported in central and western Minnesota. As storms push into western Wisconsin they will encounter an environment more favorable for robust storms as these areas have warmed into the lower 80s and midlevel shear is increasing. This should allow storms to grow out of the minisupercell form they had taken earlier into larger severe supercells capable of large hail and a few tornadoes. Earlier tornadoes across central/western MN occurred with storms that developed directly on a boundary draped across that region, while storms a bit further east and displaced from that boundary have yet to produce confirmed tornadoes. Radar shows this boundary extends southeastward and is beginning to intersect the line of storms just east and southeast of the MSP metro, and this part of western Wisconsin will be the area to watch for additional tornado development this afternoon. Given the more robust nature of these storms, stronger tornadoes will be a very real threat along with large hail 2"+.

These storms will continue to push into central/southern Wisconsin this evening at which point our attention will turn to gusty southwest winds moving in behind the cold front. Cold air advection overnight will allow gusts to continue through the night and early morning, continuing into much of Friday. For this reason the current wind advisory was extended overnight and through the day Friday. As was the case this afternoon, the advisory includes southern and western Minnesota where gusts to 50 mph are possible.

Friday looks to be a rather miserable day weather-wise, as in addition to the wind expect prolonged periods of light rain and temperatures struggling to rise out of the 50s for many areas.
While rain will clear out Friday night, below average temperatures will persist into much of next week, along with more widespread rain chances Monday and Tuesday.

AVIATION /00Z TAFS THROUGH 00Z SATURDAY/
Issued at 652 PM CDT Thu May 15 2025

Storms have cleared out of the area, leaving mainly scattered VFR in its wake. Primary concern moving forward will be gusty southwest winds of 30-35 kts through much of the period. We should see winds dampen overnight a bit, but will remain gusty.
Western and southern MN could see gusts over 40 kts. Light rain showers and lowering cigs will gradually move in from west to east Friday morning and afternoon. Winds begin to shift more westerly tomorrow afternoon and evening.

KMSP...Gusty SWerly winds will persist through early tomorrow evening around 220-240. Gusts over 30 kts will continue to be likely during this period, with a slight decrease starting this evening around 02-03z. Winds will become gusty again around 12-13z Friday morning. Gusts as high as 40 kts will be possible again Friday, but are not expected to be as frequent as we saw this afternoon and evening. Winds will start to decrease and shift more westerly around 22-01z Friday afternoon.

/OUTLOOK FOR KMSP/ SAT.. MVFR mrng cigs likely. Wind NW 10-15G20-25 kts.
SUN...VFR. Wind NE 5-10 kts.
MON...Mainly VFR. Chance MVFR/SHRA. Wind ESE 10-15G25kts.

MPX WATCHES/WARNINGS/ADVISORIES
MN...Wind Advisory until 7 PM CDT Friday for Blue Earth-Brown- Chippewa-Faribault-Freeborn-Lac Qui Parle-Le Sueur-Martin- Nicollet-Redwood-Renville-Sibley-Steele-Waseca-Watonwan- Yellow Medicine.
WI...None.