IEM Daily Bulletin for Jul 9 2025

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 09 July 2025

News

No news is good news

IEM Code Pushes <repo,branch> on Github

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Daily Feature

IEM One App
Date: 08 Jul 05:30 AM
Votes: Good: 14   Bad: 1 Abstain: 0

The featured screenshot is from the IEM One App showing the combination of NWS NEXRAD Mosaic, NWS Alerts, and three webcams all valid around 8 PM Monday evening. This app was recently added to the website as hopefully a helpful means to quickly navigate IEM's massive archives of all three products. This app also has a number of other bells and whistles to it for you to explore and provide feedback on.

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 8 Jul 2025 - 12 AM 9 Jul 2025 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	4	0	0	0	0	0	0	0
Svr Tstorm	186	3	0	0	3	0	0	1
Flash Flood	39	1	0	1	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: 181 Verified: 105 [58.0%]
Polygon Size Versus County Size            [25.2%]
Average Perimeter Ratio                    [20.9%]
Percentage of Warned Area Verified (15km)  [31.2%]
Average Storm Based Warning Size           [1342 sq km]
Probability of Detection(higher is better) [0.81]
False Alarm Ratio (lower is better)        [0.42]
Critical Success Index (higher is better)  [0.51]