Marine Weather and Tide Forecast for Olmsted, IL

DISCUSSION
Issued at 1200 PM CDT Tue Apr 14 2026

Balmy warmth more typical of the Gulf Coast this time of year continues. Record to near record highs in the mid 80s are anticipated again tmrw, here are the existing records:

Wednesday PAH 88 (1977)
EVV 86 (2024)
CGI 87 (1992)
POF 88 (1936)
MDH 87 (2024)

Weak ripples in the flow move in/overtop the area late Wednesday night-Thursday. The NBM is up to near certainty pops for the event, and with increasing shear, SPC now outlooks a MRGNL risk SVR for Thursday afternoon-evening. That's going to be highly dependent on our ability to destabilize then, after the morning bout of rain/denser associated cloud. The better chance looks shifted eastward, but it cannot be ruled out in whole here either.

After convective recovery, Friday looks to be the warmest day yet. The NBM has consistently forecast record high temps in the upper 80s. If we over-achieve just a little, we can potentially yield our (PAH) earliest 90F high temperature on record; the LREF Grand Ensemble suggests the chance that 90F will be reached is about 10%. Here are Friday's record highs and our earliest recorded 90F highs:

Friday Earliest 90F High PAH 87 (1977) April 21, 1987 (90F)
EVV 88 (1977) April 16, 1987 (90F)
CGI 86 (1977) April 20, 1987 (90F)
POF 89 (1977) March 24, 1929 (92F)
MDH 89 (1977) March 23, 1910 (93F)

The system makes robust passage Saturday with our next best chance of rain likely (70+%) to include potential for strong- severe storms and additional storm total averages of 0.25-0.50" rainfall. After fropa, we cool back to more seasonal mid April highs/lows to start out the new week.

Cumulative average storm total rainfall for the two main rounds of the week adds up to 0.50-1.25". The NBM extended probabilities suggest a 30-50% chance that total exceeds 1", which if it is realized, would offer some needed relief for our drought parched grounds.

AVIATION /00Z TAFS THROUGH 00Z THURSDAY/
Issued at 624 PM CDT Tue Apr 14 2026

VFR conditions expected through the end of the period. Expecting some high cirrus to move in overnight and then more midlevel diurnal cu to develop tomorrow during the day. Winds will continue to be out of the south and southwest tonight and tomorrow. Expect winds come down slightly overnight to around 8-10 kts and then to pick back up again tomorrow during the day with gusts to around 20-25 kts.

PAH WATCHES/WARNINGS/ADVISORIES
IL...None.
MO...None.
IN...None.
KY...None.