Iowa Environmental Mesonet Daily Bulletin for 25 July 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp Repository Message Link
Jul 24 11:11 PM iem,main ✨ Add more daily plotting obs Link
Jul 24 11:26 PM iem,main 🎨 Bump ruff and address ISC004 implicit str concat Link


Daily Feature

Tied Record Low
Date: 24 Jul 05:30 AM
Votes: Good: 16   Bad: 0 Abstain: 1

With a low temperature of 52°F on Thursday, Dubuque tied the daily record for 23 July. The featured chart presents the daily high and low temperature climatology for Dubuque along with the 2026 observations. Any set or tied records are denoted with the small dot. What's interesting about Thursday's record is that the value is also the warmest minimum low temperature record for the site. So perhaps you may consider it as the easiest low temperature record to tie during the month of July. That aside, our very enjoyable respite from typical Iowa summer weather ends on Saturday, so hopefully you can enjoy the nice temperatures today!

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 24 Jul 2026 - 12 AM 25 Jul 2026 CDT

Summary By WFO Watches
Type USIA ARXDVNDMXOAXFSD US
Tornado 10 0 0 0 0 0 0 1
Svr Tstorm 57 0 0 0 0 0 0 1
Flash Flood 41 0 0 0 0 0 0---

ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD

IEM Cow Report

SVR+TOR Warnings Issued:  67 Verified:  26 [38.8%]
Polygon Size Versus County Size            [19.2%]
Average Perimeter Ratio                    [20.7%]
Percentage of Warned Area Verified (15km)  [12.4%]
Average Storm Based Warning Size           [2335 sq km]
Probability of Detection(higher is better) [0.75]
False Alarm Ratio (lower is better)        [0.61]
Critical Success Index (higher is better)  [0.34]

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