IEM Daily Bulletin for Oct 31 2025
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 31 October 2025
News
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| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Oct 30 8:22 AM | iem-web-services,main | ⬆️ Update ruff | Link |
Daily Feature
Chillier Precipitation
Date: 30 Oct 05:30 AM
Votes: Good: 7
Bad: 0 Abstain: 1
Much needed rainfall fell over Iowa on Tuesday and into Wednesday morning. This rain also fell at somewhat chilly temperatures in the 40s. The featured chart presents a heat map of reported measurable precipitation by air temperature and given week of the year for Ames. A simple / weighted weekly average is plotted as well. For late October, mid 40s is about average for air temperature during precipitation. The 32°F reference line is plotted and you can see a clear increase in frequency at the temperature bin just above. This is due to the relative ease of the precipitation sensor to report 0.01" of falling liquid precipitation vs the same amount as snow melted to liquid. Measuring snowfall is tricky enough with light snowfall rates being even more challenging to measure as the liquid is lost to sublimation and evaporation prior to being measured.
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 30 Oct 2025 - 12 AM 31 Oct 2025 CDT
| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Svr Tstorm | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Flash Flood | 1 | 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
No SVR+TOR Warnings Issued.