IEM Daily Bulletin for Jun 15 2026

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 15 June 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Jun 14 7:34 PM	iem,main	📝 Sundry rollups per review	Link
Jun 14 7:34 PM	iem,main	⬆️ Update precommits	Link
Jun 14 7:48 PM	iem,main	💚 Address codereview	Link
Jun 14 6:59 PM	pyiem,main	⬆️ Update precommits	Link
Jun 14 7:00 PM	pyiem,main	🔧 Update SPC direct image links to PNG	Link

Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 14 Jun 2026 - 12 AM 15 Jun 2026 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	18	0	0	0	0	0	0	1
Svr Tstorm	180	0	0	0	0	0	0	4
Flash Flood	46	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: 197 Verified: 118 [59.9%]
Polygon Size Versus County Size            [33.7%]
Average Perimeter Ratio                    [31.0%]
Percentage of Warned Area Verified (15km)  [29.0%]
Average Storm Based Warning Size           [1853 sq km]
Probability of Detection(higher is better) [0.79]
False Alarm Ratio (lower is better)        [0.40]
Critical Success Index (higher is better)  [0.52]

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): 2,727
• Mastodon / Fediverse: 28
• Slack: 97
• Twitter/X: 12,441
• HTTP Webhooks: 328
• Weather.IM Jabber Chatrooms: 17,646