IEM Daily Bulletin for Apr 19 2026

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daryl herzmann

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Apr 19, 2026, 8:12:16 AM (9 days ago) Apr 19
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Iowa Environmental Mesonet Daily Bulletin for 19 April 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp Repository Message Link
Apr 18 9:05 PM iem,main 🩹 Stop the hammering Link


Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 18 Apr 2026 - 12 AM 19 Apr 2026 CDT

Summary By WFO Watches
Type USIA ARXDVNDMXOAXFSD US
Tornado 0 0 0 0 0 0 0 0
Svr Tstorm 25 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

SVR+TOR Warnings Issued:  25 Verified:   6 [24.0%]
Polygon Size Versus County Size            [30.9%]
Average Perimeter Ratio                    [27.7%]
Percentage of Warned Area Verified (15km)  [5.7%]
Average Storm Based Warning Size           [2481 sq km]
Probability of Detection(higher is better) [0.39]
False Alarm Ratio (lower is better)        [0.76]
Critical Success Index (higher is better)  [0.17]

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): 1,626
  • Mastodon / Fediverse: 11
  • Slack: 77
  • Twitter/X: 11,099
  • HTTP Webhooks: 94
  • Weather.IM Jabber Chatrooms: 10,994

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