IEM Daily Bulletin for Jun 11 2026
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 11 June 2026
News
No news is good newsIEM Code Pushes <repo,branch> on Github
| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Jun 10 8:50 AM | iem,main | 🎨 Improve NASA POWER SWDN Workflows | Link |
| Jun 10 8:58 AM | iem,main | 💚 Fixup! (codereview) Set force and improve check | Link |
| Jun 10 9:10 AM | iem,main | 🐛 Prevent processing of all NaNs | Link |
| Jun 10 9:12 AM | iem,main | 💚 Fixup! (codereview) elevate log message | Link |
| Jun 10 10:42 AM | iem,main | ✨ Generalize monthly summary scatter autoplot https://mesonet.agron.iastate.edu/plotting/auto/?q=2 |
Link |
| Jun 10 11:01 AM | iem,main | 💚 Address CI failure | Link |
| Jun 10 11:12 PM | iem,main | 🎨 Sundry updates per review | Link |
Daily Feature
Max Daily Feels Like
Date: 10 Jun 05:30 AM
Votes: Good: 14
Bad: 0 Abstain: 0
While it was plenty warm on Tuesday, the high end index values failed to materialize as humidity levels came in a bit below forecast levels and thus kept heat index values lower as well. It was still the highest heat index of the year so far for the state. The featured chart looks into heat index metrics for Des Moines with the top panel showing daily climatology along the the 2026 observations. The bottom panel shows the daily frequency of having a 100+°F maximum heat index. Frequencies steadily increase during June before topping out mid July. You can see the first week of September has higher frequencies than the first week of June! Today will be another very warm day with chances of severe thunderstorms over eastern Iowa.
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 10 Jun 2026 - 12 AM 11 Jun 2026 CDT
| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 53 | 9 | 1 | 4 | 4 | 0 | 0 | 3 |
| Svr Tstorm | 272 | 36 | 30 | 21 | 12 | 0 | 2 | 8 |
| Flash Flood | 29 | 4 | 0 | 1 | 2 | 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: 319 Verified: 159 [49.8%] Polygon Size Versus County Size [38.7%] Average Perimeter Ratio [46.6%] Percentage of Warned Area Verified (15km) [25.2%] Average Storm Based Warning Size [1918 sq km] Probability of Detection(higher is better) [0.81] False Alarm Ratio (lower is better) [0.50] Critical Success Index (higher is better) [0.45]
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