IEM Daily Bulletin for May 31 2026

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daryl herzmann

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May 31, 2026, 8:12:01 AM (8 days ago) May 31
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Iowa Environmental Mesonet Daily Bulletin for 31 May 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp Repository Message Link
May 30 7:48 AM iem-web-services,main 🐛 Fix syslog path within container Link


Daily Feature

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NWS Watch/Warning Summary for 12 AM 30 May 2026 - 12 AM 31 May 2026 CDT

Summary By WFO Watches
Type USIA ARXDVNDMXOAXFSD US
Tornado 7 0 0 0 0 0 0 1
Svr Tstorm 129 0 0 0 0 2 0 3
Flash Flood 15 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: 135 Verified:  62 [45.9%]
Polygon Size Versus County Size            [23.8%]
Average Perimeter Ratio                    [26.3%]
Percentage of Warned Area Verified (15km)  [18.4%]
Average Storm Based Warning Size           [1671 sq km]
Probability of Detection(higher is better) [0.81]
False Alarm Ratio (lower is better)        [0.54]
Critical Success Index (higher is better)  [0.42]

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): 2,153
  • Mastodon / Fediverse: 28
  • Slack: 56
  • Twitter/X: 8,870
  • HTTP Webhooks: 182
  • Weather.IM Jabber Chatrooms: 12,080

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