textproduct: Gaylord

KEY MESSAGES

- High pressure keeps things sunny and seasonably mild today.

- Spring-like warmth Sunday through much of next week, accompanied by renewed shower and thunderstorm chances (locally heavy at times). Watching increased potential for flooding and severe weather concerns.

DISCUSSION

Issued at 228 AM EDT Sat Apr 11 2026

Pattern Synopsis:

Surface high pressure over the IA / MN region will move overhead tonight, leading to subsidence overhead and clearing skies. This precedes a return to much more active conditions as longwave troughing sets up shop in the west, while a robust ridge makes its presence known across the southeast CONUS and into the Mid Atlantic. Between these two features, a pronounced thermal gradient will drive robust southern stream jet maxima from the southern Plains, through the heart of the Corn Belt, and into the upper Great Lakes region. This will allow for deep Gulf moisture to advect north and east through the aforementioned regions, overlapping periods of instability as well. Result will be an active period of weather to close out the weekend through at least the middle of next week... featuring milder temperatures, but with the cost being rounds of showers and thunderstorms, some of which may be severe... and rainfall may exacerbate ongoing hydro concerns across the region.

Details:

Other than chilly weather tonight, not much to chat about for the rest of tonight and even into today / Saturday... lows bottoming out in the 20s for most, perhaps some teens in the interior by daybreak. With surface high pressure overhead, anticipating sunshine to prevail as highs top out a few degrees above normal for early April... Highs in the mid-upper 40s north / lakeshores, 50s to near 60 across the rest of northern lower (warmest where snowpack remains minimal).

The first episode of active weather manifests Saturday night as the first plume of deeper moisture surges into the Lakes from the south and west. This may take some time to come about as preceding dry air aloft will have to be resaturated in order to drive stratiform rainfalls, as instability aloft will likely be suppressed to our south / west into Wisconsin and southern lower Michigan courtesy of a strengthening low level jet. As such, anticipating most areas to see periods of rain building later Saturday night through Sunday, with some embedded thunderstorms (especially in the SW parts of the CWA). By Sunday afternoon, plentiful moisture should be overhead... 1.00"+ PWATs, representing a 250 to 350 percent anomaly from the climatological normal, which for mid April is pushing a 4 sigma anomaly (very significant). What this means is that if a low level jet intrusion can develop again and actually force thunderstorms over the region Sunday afternoon into Sunday night, rainfall could be quite torrential. Not impossible for some areas to see 2.00"+ of rain by Monday morning... but where that happens remains up for grabs right now.

We get in between waves by Monday, with somewhat of a break, perhaps some showers to start the day. Another wave barges through the region Monday night into Tuesday, bringing another round of rain and thunderstorms. This particular wave is already showing up on SPC's radar, with portions of northern Michigan remaining included in the latest Day 4 convective outlook (15% chances across the SW CWA). This particular wave will come with yet another statistically significant moisture intrusion (3 to 3.5 sigma anomaly PWATs, values in excess of 1.00"), and thus will pose the risk of more heavy rainfall across the region. Additional waves will traverse the region through the end of the week, and will deliver more rain to the region.

Coupling this with surface temperatures poking into the 50s-60s (perhaps 70s at times south), along with dewpoints well into the 50s, AND where there is an existing snowpack, will have to watch closely for significant runoff into prone areas of eastern upper and far northern lower Michigan. With the potential for the rapid eradication of lingering snowpack and the ongoing situation across Emmet, Cheboygan, and Presque Isle counties surrounding the Cheboygan River watershed, have elected to extend the ongoing flood watch in eastern upper to include the three aforementioned and most vulnerable counties in northern lower Michigan.

AVIATION /12Z TAFS THROUGH 12Z SUNDAY/

Issued at 633 AM EDT Sat Apr 11 2026

VFR thru this evening, worsening overnight. High pressure is over lower MI today, providing quiet wx. A mid-cloud deck over far northern MI will bring cigs near 7k ft this morning for CIU and at times PLN. Clouds increase across the area tonight, and rain will push in from the sw overnight. MVFR cigs/vsbys will develop late tonight.

Light winds today, se winds increase tonight.

APX WATCHES/WARNINGS/ADVISORIES

MI...Flood Watch from this evening through Wednesday morning for MIZ016>018-086>088-095-096. MARINE...None.