IEM Daily Bulletin for Aug 26 2025
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 26 August 2025
News
No news is good newsIEM Code Pushes <repo,branch> on Github
| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Aug 25 8:48 AM | iem,main | ⚡️ Run rwis2archive every 10 minutes due to needs | Link |
| Aug 25 9:59 AM | iem,main | 🐛 Fix typo preventing plot from archiving | Link |
| Aug 25 10:00 AM | iem,main | ⬆️ Update eslint | Link |
| Aug 25 9:45 PM | iem,main | 📝 Sundry bootstrap5 updates | Link |
| Aug 25 9:46 AM | pyiem,main | 🐛 Address RWIS iemid change refs akrherz/iem#1359 |
Link |
| Aug 25 9:47 AM | pyiem,main | ⬆️ Update ruff | Link |
| Aug 25 11:41 AM | iemone,main | ✨ Add RWIS Obs layer | Link |
| Aug 25 12:02 PM | iemone,main | 💚 Address some lint | Link |
| Aug 25 1:37 PM | pywwa,main | ⬆️ Update ruff | Link |
| Aug 25 2:12 PM | pywwa,main | 📝 Modernize to bootstrap5 | Link |
Daily Feature
Sub-75 During August
Date: 25 Aug 05:30 AM
Votes: Good: 10
Bad: 0 Abstain: 0
With school starting for much of the state today and football season about underway, it was fitting for the weather this past weekend to be very much fall-like as well. With high temperatures in the lower 70s and low humidity, it was a crisp taste of fall season weather! The featured chart presents the observed frequency during each day of August for a high temperature below 75°F for Ames. The values plotted above each bar are the number of years over the period of record with as cool a high temperature. These events certainly increase in frequency as the month progresses, but overall values are only ranging from about 5 to 15%. Pleasant temperature look to stick around for at least this week along with dry conditions.
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 25 Aug 2025 - 12 AM 26 Aug 2025 CDT
| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Svr Tstorm | 39 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Flash Flood | 37 | 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: 39 Verified: 10 [25.6%] Polygon Size Versus County Size [5.2%] Average Perimeter Ratio [15.6%] Percentage of Warned Area Verified (15km) [14.5%] Average Storm Based Warning Size [957 sq km] Probability of Detection(higher is better) [0.50] False Alarm Ratio (lower is better) [0.74] Critical Success Index (higher is better) [0.20]