IEM Daily Bulletin for Aug 24 2025

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 24 August 2025

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Aug 23 10:29 AM	iem,main	🐛 Address issues found with RWIS iemid usage refs #1359	Link
Aug 23 4:48 PM	iem-web-services,main	⚡️ Polish RWIS service	Link

Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 23 Aug 2025 - 12 AM 24 Aug 2025 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	22	0	0	0	0	0	0	0
Flash Flood	25	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:  21 Verified:   4 [19.0%]
Polygon Size Versus County Size            [4.7%]
Average Perimeter Ratio                    [13.9%]
Percentage of Warned Area Verified (15km)  [16.1%]
Average Storm Based Warning Size           [563 sq km]
Probability of Detection(higher is better) [0.46]
False Alarm Ratio (lower is better)        [0.81]
Critical Success Index (higher is better)  [0.16]