IEM Daily Bulletin for Sep 8 2025

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 08 September 2025

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
No code commits found in previous 24 Hours

Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 7 Sep 2025 - 12 AM 8 Sep 2025 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	0	0	0	0	0	0	0	0
Svr Tstorm	19	0	0	0	0	0	0	0
Flash Flood	12	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:  19 Verified:   1 [5.3%]
Polygon Size Versus County Size            [5.4%]
Average Perimeter Ratio                    [9.3%]
Percentage of Warned Area Verified (15km)  [3.5%]
Average Storm Based Warning Size           [627 sq km]
Probability of Detection(higher is better) [0.29]
False Alarm Ratio (lower is better)        [0.95]
Critical Success Index (higher is better)  [0.05]