IEM Daily Bulletin for Aug 2 2026

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 02 August 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Aug 1 2:53 PM	iemlsr,main	📝 Sundry churn for updated deps	Link

Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 1 Aug 2026 - 12 AM 2 Aug 2026 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	16	0	0	0	0	0	0	0
Svr Tstorm	44	0	0	0	0	0	0	0
Flash Flood	37	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:  60 Verified:   9 [15.0%]
Polygon Size Versus County Size            [11.0%]
Average Perimeter Ratio                    [16.4%]
Percentage of Warned Area Verified (15km)  [6.9%]
Average Storm Based Warning Size           [878 sq km]
Probability of Detection(higher is better) [0.43]
False Alarm Ratio (lower is better)        [0.85]
Critical Success Index (higher is better)  [0.13]

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): 2,209
• Mastodon / Fediverse: 36
• Slack: 1,782
• Twitter/X: 10,300
• HTTP Webhooks: 232
• Weather.IM Jabber Chatrooms: 13,423