IEM Daily Bulletin for Nov 9 2025

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 09 November 2025

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Nov 8 3:58 PM	iem,main	📝 Sundry improvements	Link
Nov 8 4:06 PM	iem,main	💚 Address issues found by CI	Link

Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 8 Nov 2025 - 12 AM 9 Nov 2025 CST

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	0	0	0	0	0	0	0	0
Svr Tstorm	16	0	0	0	0	0	0	0
Flash Flood	0	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:  16 Verified:   8 [50.0%]
Polygon Size Versus County Size            [30.0%]
Average Perimeter Ratio                    [31.0%]
Percentage of Warned Area Verified (15km)  [29.2%]
Average Storm Based Warning Size           [1135 sq km]
Probability of Detection(higher is better) [0.78]
False Alarm Ratio (lower is better)        [0.50]
Critical Success Index (higher is better)  [0.44]