Marine Weather and Tide Forecast for Monterey, IN

DISCUSSION
Issued at 126 PM EDT Sat Jun 27 2026

Areas of showers and storms continue to develop along a stationary boundary near the Ohio River. A few CAMs still try to develop widely scattered showers across southern parts of the forecast area along an elevated warm front draped in this same area. Cu field has been rather unimpressive so far, but a few hints of some more agitated cu and weak returns may be staring to take shape. As a result, will maintain a slgt chc through 00Z before ending with loss of heating.

Upper level low pressure in the NW US will dig further and stall out, with strong ridging aloft still on track to bring a blast of hot and humid conditions. Sunday will see more seasonable highs in the 80s with the humidity increasing through the afternoon. Heat indices will start to climb, but remain well below headline thresholds. An MCS is expected to develop in MN Sunday and propagate ESE along the advancing warm front. Some models try to bring some remnants of this in Sunday night, but doesn't seem overly likely so will remove any spurious pops late Sun night related to this.

By Monday, upper level ridging will begin to take hold with the warm front well north of the region allowing for the first of what will most likely be several days of dangerous heat indices. Monday will be more "marginal" with values either side of the 100 degree threshold, but Tue-Thu seem rather straight forward with expected values of 100 to 105 (higher?). Although on any given day we will remain at advisory vs warning levels, the longevity of the event and lack of cooling at night brings greater risks to those sensitive to the heat and humidity. Coordination took place on hoisting a Excessive Heat Watch Mon-Thu, but several concerns existed mainly with exactly how high dewpoints will get and to our west a potential for convective complexes on the western fringes of the ridge. Will defer any headlines for now as a result and continue to push messaging. On a side note, while not "criteria" for heat headlines, the NWS HeatRisk guidance highlights the Major Category (Mon and Tue) and Extreme for Wed and Thu). For more details on what goes into this guidance and a look at the latest guidance, go to www.wpc.ncep.noaa.gov/heatrisk.

With regards to convective chances, as already mentioned in the past an unstable atmosphere will be in place but lack of triggers and a very capped mid level will likely prevent much activity into Wed and likely Thu as well. NBM brings some low pops in as early as Thu in the far north and then moreso into the upcoming holiday weekend.
Will deal with those details in the coming days.

AVIATION /18Z TAFS THROUGH 18Z SUNDAY/
Issued at 107 PM EDT Sat Jun 27 2026

MVFR cigs for both TAF sites currently but VFR conditions look to return around 21z Sat with better surface warming to help mix out the lower cigs. There is still though some uncertainty to the timing as that pesky quasi-stationary/warm front continues to sit just to the south of the area which does keep the lower cigs and isolated showers south of both TAF sites. Will need to keep an eye on KFWA overnight as with the closer proximity to the boundary, light winds, and lower dew point depressions there could be the potential for some mist/fog patches to develop. At this time was more confident of some lowering of vsbys due to patches of mist developing and left mention of fog out at this time for KFWA.

IWX WATCHES/WARNINGS/ADVISORIES
IN...None.
OH...None.
MI...None.
MARINE...None.