IEM Daily Bulletin for Jul 1 2025
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 01 July 2025
News
No news is good newsIEM Code Pushes <repo,branch> on Github
| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Jun 30 7:03 AM | iem,main | 🎨 Prevent bad SCAN obs from generating warning | Link |
| Jun 30 10:12 AM | iem,main | 🎨 Modernize javascript and bootstrap5 updates | Link |
| Jun 30 10:18 AM | iem,main | 💚 Prevent property injection | Link |
| Jun 30 1:43 PM | iem,main | 🔥 Remove dependabot commits from dailyb | Link |
| Jun 30 10:05 PM | iem,main | 🎨 Modernize javascript and bootstrap5 usage | Link |
Daily Feature
Hot June Hours
Date: 30 Jun 05:30 AM
Votes: Good: 12 Â
Bad: 1 Abstain: 1
While temperatures did back off somewhat on Sunday, it was still a rather hot weekend for June with heat index values in the 90s for much of the daytime Saturday and a few hours on Sunday for Des Moines. The featured chart presents the number of June hours with a heat index reading for at least 90 degrees. The top panel shows the number of hours per year with the bottom panel showing an hour of day accounting with a simple climatology. Remarkably, a number of years are shown with zero such hours during the month of June. One only needs to look back two years ago, 2023, for a total of just five hours. The 2025 total doesn't quite crack the top 10 yet and the forecast for today doesn't have such hot temperatures, so the accumulation may be it as we have made it to the end of June!
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 30 Jun 2025 - 12 AM 1 Jul 2025 CDT
| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Svr Tstorm | 95 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Flash Flood | 52 | 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: 34 [34.7%] Polygon Size Versus County Size [19.0%] Average Perimeter Ratio [24.2%] Percentage of Warned Area Verified (15km) [18.9%] Average Storm Based Warning Size [1189 sq km] Probability of Detection(higher is better) [0.65] False Alarm Ratio (lower is better) [0.65] Critical Success Index (higher is better) [0.29]