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Hottest feeling day of the year possible ahead of late-week cooldown

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ROCKFORD (WREX) — Hazy, hot, and humid weather sticks around through midweek. Cooler and drier air is right around the corner.

Heat continues to build:

Temperatures do not change much through midweek. Highs stay in the upper 80s to low 90s through Thursday. This likely makes it six days in a row in the 90s, dating back to last Friday. It would also tie our longest stretch of 90° days so far this summer.

The humidity, however, changes by Wednesday. Humid air builds back in again, creating a sticky situation by midweek. You'll feel the humidity in the air Tuesday, but it's not to uncomfortable levels yet. The heat index stays in the middle 90s Tuesday afternoon. Not comfortable, but not totally unbearable.

By Wednesday, the humidity is back up to uncomfortable levels like we felt last Saturday. The heat index, as a result, jumps to the upper 90s, and may sneak into the 100s in a few spots like Rockford. Heat index values near 100° could be high enough to prompt heat advisories locally. If that does happen, we'll make sure to pass that along. Regardless of heat advisory or not, take it easy outdoors. If you can, stay inside with air conditioning and plenty of water. The air stays humid like this through Thursday morning, then drier and cooler air is the story for the rest of the week.

Heat indices top out near 100° by Wednesday.

Midweek storms could get rowdy:

Strong thunderstorms fire up in Minnesota and Wisconsin during the day Wednesday, then shift southeastward as the day goes along. Since northern Illinois is currently on the fringe of their path, we may be glanced by strong to severe storms. Damaging winds and large hail would be the main threats. Heavy rainfall may be a possibility as well.

A cold front shifts in behind the storms. If the front is slow enough, we may see another chance for storms early Thursday. Once the front goes by, quiet and cooler weather settles in long term.

Finally cooling off:

We may not get into the more comfortable weather immediately. Thursday stays in the upper 80s, with high humidity through the morning. You'll notice a difference by Friday, however. Temperatures fall into the low 80s, with low humidity and a sunny sky. Look for similar weather this weekend, with only a slight chance for rain on Saturday.

Another push of cooler air could send temperatures into the upper 70s by next Monday. After that, conditions hold steady in the low 80s throughout next week.

Justin Ballard

Justin Ballard joined 13 WREX as the weekday morning meteorologist. He’s a proud graduate of UNC-Charlotte and happy to call Rockford home.

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