IEM Daily Bulletin for Nov 19 2025
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 19 November 2025
News
No news is good newsIEM Code Pushes <repo,branch> on Github
| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Nov 18 8:45 AM | iem,main | ✨ Add end year option | Link |
| Nov 18 8:46 AM | iem,main | ⬆️ Update eslint | Link |
| Nov 18 8:51 AM | iem,main | 🎨 Address seaborn deprecation | Link |
| Nov 18 12:16 PM | iem,main | ✨ Add matches parameter to remove ambiquity https://mesonet.agron.iastate.edu/cgi-bin/afos/retrieve.py?help |
Link |
| Nov 18 10:06 PM | iem,main | 🐛 Rectify station identifier | Link |
Daily Feature
Within 20 Degrees
Date: 18 Nov 05:30 AM
Votes: Good: 9
Bad: 0 Abstain: 0
Yesterday's daily feature denoted one day each for the previous week within the top 10 warmest above and coolest below average for the year for Ames. The positive departure was about 27 degrees and negative departure near 20 degrees. The featured chart today looks into the frequency of having at least a 20 degree departure from average for the given day of the year for Ames. This chart illustrates how such events are more frequent during the cold season due to the reasons listed out with yesterday's feature, namely reduced humidity and stronger air mass contrasts allowing for larger temperature swings. The forecast for the next week keeps temperatures not too far from average for this time of year.
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 18 Nov 2025 - 12 AM 19 Nov 2025 CST
| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Svr Tstorm | 29 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Flash Flood | 5 | 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: 30 Verified: 9 [30.0%] Polygon Size Versus County Size [13.7%] Average Perimeter Ratio [22.7%] Percentage of Warned Area Verified (15km) [17.7%] Average Storm Based Warning Size [1351 sq km] Probability of Detection(higher is better) [0.77] False Alarm Ratio (lower is better) [0.70] Critical Success Index (higher is better) [0.28]