IEM Daily Bulletin for Apr 11 2026
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 11 April 2026
News
No news is good newsIEM Code Pushes <repo,branch> on Github
| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Apr 10 8:45 AM | iem,main | 🎨 Address numpy type comparison with ISUSM ingest | Link |
| Apr 10 8:45 AM | iem,main | ⬆️ Update ruff | Link |
| Apr 10 9:52 AM | iem,main | 🐛 Fix SBW Geojson time filter The at or sts timestamp should match warnings issued at that time. https://mesonet.agron.iastate.edu/geojson/sbw.py?help |
Link |
| Apr 10 12:51 PM | pyiem,main | ⬆️ Update precommits | Link |
| Apr 10 12:55 PM | pyiem,main | 🎨 Prevent too-long memcache keys in iemapp | Link |
| Apr 10 9:18 AM | iem-web-services,main | ⬆️ Update ruff | Link |
| Apr 10 9:39 AM | iem-web-services,main | 🎨 Remove /mesonet/ARCHIVE filesystem dependence | Link |
| Apr 10 10:11 AM | iem-web-services,main | ⚡️ Drop --reload usage in prod, bad idea | Link |
| Apr 10 10:44 AM | iem-web-services,main | 🎨 Build out container deployment | Link |
| Apr 10 11:02 AM | iem-web-services,main | 🎨 Address .pgpass needs for container | Link |
| Apr 10 11:16 AM | iem-web-services,main | ➕ Add gunicorn conda dep | Link |
| Apr 10 11:38 AM | iem-web-services,main | 🎨 Define container listen host/port | Link |
| Apr 10 12:40 PM | iem-web-services,main | 🔨 Add mambauser dbuser shim refs akrherz/pyIEM#1191 |
Link |
| Apr 10 12:41 PM | iem-web-services,main | 🎨 Cleanup more podman things | Link |
Daily Feature
April Temp Distributions
Date: 10 Apr 05:30 AM
Votes: Good: 11
Bad: 0 Abstain: 0
Along with numerous chances for rain, the near term forecast looks rather warm with low temperatures starting off next week in the 60s! Iowa's weather during April can sometimes feel like winter and sometimes like summer! The featured chart looks into high temperature distributions over approximately the first half and second half of the period of record for Ames. A frequency distribution estimate is plotted for each period within the top panel and the difference between the two is plotted within the bottom panel. It is interesting to denote the tails of the recent period distribution having slightly higher frequency than the first half of the period of record. The right hand table lists out percentile values for both (please note the unfortunate tight visual spacing between the 99.5th and 99.9th values). Anyway, this autoplot can be used to compare various periods of your choice and you can see what changes have been observed.
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 10 Apr 2026 - 12 AM 11 Apr 2026 CDT
| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Svr Tstorm | 36 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Flash Flood | 5 | 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: 37 Verified: 3 [8.1%] Polygon Size Versus County Size [6.8%] Average Perimeter Ratio [9.6%] Percentage of Warned Area Verified (15km) [4.3%] Average Storm Based Warning Size [952 sq km] Probability of Detection(higher is better) [0.50] False Alarm Ratio (lower is better) [0.92] Critical Success Index (higher is better) [0.07]
IEMBot Social Media Posts
IEMBot can be configured to post messages to a number of social media services. More details: IEMBot Homepage.
Posts yesterday per supported service:
- ATMosphere (bluesky only attm): 1,492
- Mastodon / Fediverse: 9
- Slack: 34
- Twitter/X: 8,015
- HTTP Webhooks: 26
- Weather.IM Jabber Chatrooms: 8,581