IEM Daily Bulletin for Jul 23 2026
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 23 July 2026
News
No news is good newsIEM Code Pushes <repo,branch> on Github
| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Jul 22 10:32 PM | iem,main | 🐛 Implement more exact day of year plotting | Link |
| Jul 22 10:43 PM | iem,main | 💚 Address codereview | Link |
| Jul 22 10:00 AM | pyiem,main | ✨ Add UGC info to jabber message from generic prod | Link |
| Jul 22 10:31 AM | pyiem,main | 🎨 Add knob to control ugcs_to_text msg size | Link |
| Jul 22 10:32 AM | pyiem,main | ♻️ Refactor tests to avoid UGC loading | Link |
| Jul 22 10:48 AM | pyiem,main | 💚 Address test result change and codereview | Link |
| Jul 22 12:48 PM | pyiem,main | 🎨 Improve PTS parsing log message | Link |
| Jul 22 12:53 PM | pyiem,main | ⚡️ Reduce boilerplate in PTS testing | Link |
| Jul 22 1:03 PM | pyiem,main | 💚 Address codereview | Link |
Daily Feature
July Contrasts
Date: 22 Jul 05:30 AM
Votes: Good: 14
Bad: 0 Abstain: 1
The featured map presents an accumulated precipitation estimate for July 2026 to date courtesy of NOAA MRMS. A sizable chunk of Iowa is indicated receiving less than two inches so far with another sizable chunk in the six to ten inches and even higher range. An average accumulation for the first third of July is around three inches, so it has been a dry month for some in the state! The heavy precipitation events have been isolated, which is typical this time of year due to reduced storm motions and increased precipitation rates due to elevated atmospheric humidity levels. These precipitation contrasts over short distances can have significant implications for water availability and stress for agricultural crops.
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 22 Jul 2026 - 12 AM 23 Jul 2026 CDT
| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Svr Tstorm | 38 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Flash Flood | 46 | 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: 40 Verified: 14 [35.0%] Polygon Size Versus County Size [11.4%] Average Perimeter Ratio [20.7%] Percentage of Warned Area Verified (15km) [19.7%] Average Storm Based Warning Size [1240 sq km] Probability of Detection(higher is better) [0.67] False Alarm Ratio (lower is better) [0.65] Critical Success Index (higher is better) [0.30]
IEMBot Social Media Posts
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