Blog Article
April 18, 2026 Weather Recap: Midwest Winds & Texas Floods
A recap of the April 18, 2026 severe weather event, including 85 mph winds in Illinois, golf-ball hail in West Texas, and flash flooding in Houston.
April 18 Recap: Midwest Winds, Texas Hail, and Houston Flooding
Correction (April 19): An earlier version of this recap stated that an EF-1 tornado was confirmed near Treloar, Missouri on April 18. That claim was based on a paraphrased entry in our internal history pipeline that we have not been able to verify against an NWS damage survey. We are removing it pending verification. Apologies for the error. The remainder of the recap stands.
Y'all, yesterday was a busy one. We saw the atmosphere drop 85 mph winds on Illinois and swamp parts of Houston with serious flash flooding. When you have a setup that transitions from severe convection in the Midwest to a widespread water event in the South, things happen fast.
I want to be completely honest with you right out of the gate. In our last forecast update, we spent a lot of time talking about the upcoming Northeast freeze and that cutoff low hitting California. While those events are unfolding exactly as expected, the immediate threat yesterday materialized right over the Midwest and Southeast Texas. We focused heavily on the long-range setup, but yesterday was a stark reminder that the atmosphere right in front of us always demands our full attention.
Here is what we can confirm from April 18, 2026.
The Midwest Severe Threat Escalates
The day brought an escalating severe convective threat across the Midwest, with the wind profile becoming the main story as the system pushed east into Illinois.
Get this: a spotter in Normal, Illinois, measured an 85 mph wind gust with an anemometer. That is well past hurricane force. Winds that strong do not just take down tree limbs. They snap power poles and cause real structural damage, which is exactly what was reported in the area. Power outages peaked at over 21,000 customers in McLean County, IL.
!Educational diagram of a thunderstorm microburst
Texas Sees Hail and High Water
While the Midwest was dealing with wind, Texas was getting hit with a mix of large hail and torrential rain. Out in West-Central Texas, Crockett County reported hail up to 1.75 inches in diameter. That is golf ball size, large enough to dent vehicles and damage roofs.
But the most significant human impact yesterday happened in the Houston metro area. A slow-moving setup dumped massive amounts of water over highly urbanized ground. The flash flooding was severe enough to shut down Interstate 10 in both directions at McCarty Street. Multiple vehicles were submerged, and first responders were busy with high-water rescues throughout the evening.
Hydrological Concerns Moving Forward
All that water has to go somewhere, and we are seeing major river flooding concerns pop up.
- Illinois Rivers: The Rock River at Moline is forecast to approach historical major flood levels at 14.6 feet. Over in Lincolnshire, the Des Plaines River is forecast to reach a major flood stage of 15.5 feet.
- Wisconsin Levees: A Flash Flood Watch was issued for Sauk and Columbia Counties due to the potential compromise of the Caledonia-Lewiston Levee.
- Puerto Rico: Down in Aguada, PR-418 had to be closed because the Rio Culebrinas overflowed its banks.
What Comes Next
Now that yesterday's system has moved through, we are shifting our focus back to the patterns we discussed in our previous forecast.
First, that deep freeze in the Northeast is arriving now. Temperatures are dropping rapidly behind a strong cold front, and we are looking at snow for the higher elevations of the Adirondacks and northern Maine. Any standing water from recent rains will freeze solid.
Second, we have a critical fire weather setup today across the Southern High Plains. We have bone-dry air with dewpoints in the single digits and southwest winds picking up. If a fire starts out there today, it will spread incredibly fast.
Finally, we are keeping a very close eye on Thursday and Friday. The Storm Prediction Center still has a 15 percent risk area for severe weather across the Central and Southern Plains, covering cities from Oklahoma City up to Kansas City, and over toward Shreveport. A western trough is going to pull Gulf moisture north, setting the stage for multiple days of severe potential.
Bottom Line
Yesterday was a classic spring transition day. We saw how quickly a severe convective threat can produce a destructive straight-line wind event, and how vulnerable our urban corridors remain to flash flooding. The forecast models did a good job capturing the overall synoptic pattern, but the localized intensity of the 85 mph gust in Illinois and the flooding in Houston required real-time, ground-level awareness. As we look toward the severe threat later this week, we will be watching those mesoscale details very closely.