IEM Daily Bulletin for Sep 13 2025
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 13 September 2025
News
No news is good newsIEM Code Pushes <repo,branch> on Github
| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Sep 12 11:35 AM | iem,main | 📝 Sundry rollup and testing improvements | Link |
| Sep 12 11:58 AM | iem,main | 💚 Address coverage | Link |
| Sep 12 9:56 AM | pyiem,main | ⬆️ Update ruff | Link |
| Sep 12 9:58 AM | pyiem,main | 🐛 Stop smtp connect when there's no emails to send | Link |
| Sep 12 10:04 AM | pyiem,main | 💚 Address coverage and some lint | Link |
| Sep 12 4:05 PM | pyiem,main | 🐛 Rework XSS detection in iemapp | Link |
| Sep 12 4:18 PM | pyiem,main | 💚 Update baseline issue101 test result plot | Link |
| Sep 12 4:18 PM | pyiem,main | 💚 Address CI issues | Link |
| Sep 12 4:27 PM | pyiem,main | 💚 Address coverage | Link |
| Sep 12 7:04 PM | pyiem,main | 🎨 Drop nh3 as not needed for XSS | Link |
| Sep 12 7:16 PM | pyiem,main | 💚 Address coverage | Link |
| Sep 12 7:22 PM | pyiem,main | ✅ Add test for int type in iemapp | Link |
| Sep 12 10:28 PM | pyiem,main | 🐛 Account for XSS edge case | Link |
Daily Feature
90s yet this September
Date: 12 Sep 05:30 AM
Votes: Good: 12
Bad: 1 Abstain: 0
Very warm temperatures are forecast this Friday and into the weekend. Portions of Iowa will be pushing 90°F each day. The featured map presents the percentage of years that the given long term climate site recorded at least one daily high temperature of 90+ degrees between 12 and 30 September. Maps like these tend to be a bit noisy with varying periods of record and micro-climate effects, but the general pattern over the state is clear with the highest frequencies over southern Iowa and lowest over northeastern Iowa. Overall, percentages shown are below 50% for practically the entire state, so having such a warm temperature happens less often than not. Certainly, it would be the most exceptional to have such a warm temperature over northeastern Iowa, where shown frequencies are in the 10-20% range (one out of every 5 to 10 years).
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 12 Sep 2025 - 12 AM 13 Sep 2025 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 | 100 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Flash Flood | 15 | 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: 98 Verified: 29 [29.6%] Polygon Size Versus County Size [7.7%] Average Perimeter Ratio [10.8%] Percentage of Warned Area Verified (15km) [12.9%] Average Storm Based Warning Size [1305 sq km] Probability of Detection(higher is better) [0.80] False Alarm Ratio (lower is better) [0.70] Critical Success Index (higher is better) [0.28]