IEM Daily Bulletin for Jul 13 2026

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 13 July 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

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Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 12 Jul 2026 - 12 AM 13 Jul 2026 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	1	0	0	0	0	0	0	0
Svr Tstorm	107	0	0	0	0	0	0	3
Flash Flood	78	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: 108 Verified:  45 [41.7%]
Polygon Size Versus County Size            [14.6%]
Average Perimeter Ratio                    [15.8%]
Percentage of Warned Area Verified (15km)  [18.7%]
Average Storm Based Warning Size           [1580 sq km]
Probability of Detection(higher is better) [0.70]
False Alarm Ratio (lower is better)        [0.58]
Critical Success Index (higher is better)  [0.35]

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): 2,312
• Mastodon / Fediverse: 37
• Slack: 2,049
• Twitter/X: 10,906
• HTTP Webhooks: 172
• Weather.IM Jabber Chatrooms: 14,402