IEM Daily Bulletin for May 24 2026

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 24 May 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
May 24 7:01 AM	pywwa,main	➕ Add CEE6 to pireps	Link

Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 23 May 2026 - 12 AM 24 May 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	126	0	0	0	0	0	0	2
Flash Flood	27	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: 122 Verified:  49 [40.2%]
Polygon Size Versus County Size            [32.8%]
Average Perimeter Ratio                    [25.9%]
Percentage of Warned Area Verified (15km)  [14.3%]
Average Storm Based Warning Size           [2398 sq km]
Probability of Detection(higher is better) [0.79]
False Alarm Ratio (lower is better)        [0.60]
Critical Success Index (higher is better)  [0.36]

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): 2,132
• Mastodon / Fediverse: 19
• Slack: 83
• Twitter/X: 10,223
• HTTP Webhooks: 193
• Weather.IM Jabber Chatrooms: 13,775