Date: 17 Jul 05:30 AM
Votes: Good: 8 Bad: 0 Abstain: 0
| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Jul 17 7:05 AM | iem,main | 🐛 Prevent NaN reaching the database | Link |
| Jul 17 7:41 AM | iem,main | ⬆️ Update ruff precommit | Link |
| Jul 17 10:11 AM | iem,main | 📝 Update page verbiage | Link |
| Jul 17 11:12 AM | iem,main | ✨ Add some bling to CLI infographic https://mesonet.agron.iastate.edu/plotting/auto/?q=218 |
Link |
| Jul 17 11:28 AM | iem,main | 💚 Address codereview | Link |
| Jul 17 1:01 PM | iem,main | 📝 Clarify CCI units and convert to F when possible | Link |
| Jul 17 9:17 AM | pyiem,main | ⬆️ Update precommits | Link |
| Jul 17 9:21 AM | pyiem,main | ⚡️ Prevent unused UGC load in CLI parser | Link |
| Jul 17 9:27 AM | pyiem,main | 🎨 Handle `M` in CLI parsing as None | Link |
| Jul 17 12:46 PM | pyiem,main | 💥 Assign units to cci calculation return value | Link |
| Jul 17 12:51 PM | pyiem,main | 💚 Address codereview | Link |
July Precip vs Pressure
Date: 17 Jul 05:30 AM
Votes: Good: 8
Bad: 0 Abstain: 0
The high pressure system that has been in firm control of our weather this week loosened its grip slightly on Thursday allowing for some scattered afternoon storms to develop. For July, sea level pressure readings this week have been near the top of the observed range thanks to the strong upper level ridge. The featured chart takes a look at the maximum observed hourly precipitation by sea level pressure for Des Moines during July. A general and intuitive relationship is shown with maximum precipitation values generally decreasing as pressure readings get to either extreme of the observed range. While the reason for the decrease in precipitation for the highest pressure seems obvious as higher pressure implies less upward vertical motion in the atmosphere, why do values decrease at the lowest pressures as well? The speculative reason likely has to with the most intense storms being displaced from the surface low pressure center and perhaps also due to stronger winds associated with lower pressures and leading to faster storm motions with less training of storms over the same location.
The featured media can be generated on-demand here
.| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Svr Tstorm | 76 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Flash Flood | 93 | 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: 78 Verified: 22 [28.2%] Polygon Size Versus County Size [11.8%] Average Perimeter Ratio [14.4%] Percentage of Warned Area Verified (15km) [15.9%] Average Storm Based Warning Size [1225 sq km] Probability of Detection(higher is better) [0.72] False Alarm Ratio (lower is better) [0.72] Critical Success Index (higher is better) [0.25]
IEMBot can be configured to post messages to a number of social media services. More details: IEMBot Homepage.
Posts yesterday per supported service: