Date: 23 Sep 05:30 AM
Votes: Good: 12 Bad: 0 Abstain: 1
| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Sep 23 9:24 AM | iem,main | 🎨 Add NOMADS dl failback when S3 is not updating | Link |
| Sep 23 9:49 AM | iem,main | 🐛 Address bugs with IA RWIS METAR generation | Link |
| Sep 23 10:04 AM | iem,main | 💚 Address codereview | Link |
| Sep 23 10:57 PM | iem,main | 🐛 Address numerical instability | Link |
Cloudy September
Date: 23 Sep 05:30 AM
Votes: Good: 12
Bad: 0 Abstain: 1
Tuesday was yet another rather dreary day with more rain and plenty of overcast cloudiness. The featured chart looks into the monthly frequency of overcast conditions as reported by the Des Moines airport weather station. There are number of caveats with long term comparisons of cloud coverage as techniques and instrumentation has changed over the years. That aside, the top panel shows the monthly max and min values along with a simple mean and actual 2026 observations for percentage of hours with the sky coverage being overcast. The bottom panel plots the yearly values for September. The 2026 value is certainly above average and about the fourth highest on record so far. Thankfully, a bit more sunshine is expected today before more cloudiness returns.
The featured media can be generated on-demand here
.| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Svr Tstorm | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Flash Flood | 42 | 0 | 0 | 0 | 0 | 0 | 0 | --- |
ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD
SVR+TOR Warnings Issued: 8 Verified: 2 [25.0%] Polygon Size Versus County Size [6.5%] Average Perimeter Ratio [15.8%] Percentage of Warned Area Verified (15km) [19.4%] Average Storm Based Warning Size [861 sq km] Probability of Detection(higher is better) [0.50] False Alarm Ratio (lower is better) [0.75] Critical Success Index (higher is better) [0.20]
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