IEM Daily Bulletin for Mar 19 2026
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 19 March 2026
News
No news is good newsIEM Code Pushes <repo,branch> on Github
| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Mar 18 8:04 AM | iem,main | 📝 Sundry updates per log review | Link |
| Mar 18 11:20 AM | iem,main | ✨ Implement new autoplot filtervar type refs akrherz/pyIEM#1180 |
Link |
| Mar 18 11:21 AM | iem,main | ✨ Add top 15 autoplot listing daily climo combos https://mesonet.agron.iastate.edu/plotting/auto/?q=262 |
Link |
| Mar 18 11:46 AM | iem,main | 💚 Address deepsource concern | Link |
| Mar 18 12:02 PM | iem,main | 📝 CI: pin libnetcdf for now | Link |
| Mar 18 4:08 PM | iem,main | 💚 CI: update upterm coordinates | Link |
| Mar 18 6:36 PM | iem,main | 🎨 Consolidate json/geojson into single dispatch | Link |
| Mar 18 10:51 PM | iem,main | 🔥 Remove stale rewriterule | Link |
| Mar 18 11:25 PM | iem,main | 🎨 Directly reference dispatch | Link |
| Mar 18 11:31 PM | iem,main | 💚 Update apache config to allow access | Link |
| Mar 18 8:38 AM | pyiem,main | ♻️ Refactor util.get_autoplot_context > autoplot.py | Link |
| Mar 18 9:48 AM | pyiem,main | ✨ Add filtervar autoplot type closes #1180 |
Link |
| Mar 18 10:14 AM | pyiem,main | 💚 Address autoplot coverage | Link |
| Mar 18 10:20 AM | pyiem,main | 💚 Address deepsource concerns | Link |
| Mar 18 11:41 AM | pyiem,main | 🐛 Correct text_handler (bug from prev commit) | Link |
Daily Feature
To Accumulate An Inch
Date: 18 Mar 07:46 AM
Votes: Good: 15
Bad: 0 Abstain: 0
Much of the state continues to need rain to make up for dry conditions that have persisted since about August of 2025. This is a fickle time of year though as temperatures are still yet chilly and moisture is limited, so significant rainfall events can be difficult to come by. The featured chart attempts to illustrate this by plotting the accumulated frequency of having at least an inch of precipitation accumulated after 18 March. For example, about half of previous years on record for Ames have accumulated at least an inch between 18 March and 4 April. Remarkably, a couple of years took over a month of time to accumulate just an inch or more. Unfortunately, the near term forecast is quite dry as our weather is heavily influenced by the strong western US anti-cyclone that is bringing record setting warmth to the southwestern US and beyond.
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 18 Mar 2026 - 12 AM 19 Mar 2026 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 | 0 | 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.
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