IEM Daily Bulletin for Sep 7 2026

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 07 September 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
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Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 6 Sep 2026 - 12 AM 7 Sep 2026 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	2	0	0	0	0	0	0	0
Svr Tstorm	158	8	0	0	5	2	1	3
Flash Flood	24	5	0	0	2	2	3	---

ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD

IEM Cow Report

SVR+TOR Warnings Issued: 155 Verified:  77 [49.7%]
Polygon Size Versus County Size            [20.5%]
Average Perimeter Ratio                    [20.3%]
Percentage of Warned Area Verified (15km)  [26.9%]
Average Storm Based Warning Size           [1449 sq km]
Probability of Detection(higher is better) [0.84]
False Alarm Ratio (lower is better)        [0.50]
Critical Success Index (higher is better)  [0.45]

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): 2,408
• Mastodon / Fediverse: 18
• Slack: 1,983
• Twitter/X: 10,764
• HTTP Webhooks: 940
• Weather.IM Jabber Chatrooms: 13,461