IEM Daily Bulletin for Oct 26 2025

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 26 October 2025

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Oct 25 4:22 PM	iem,main	⬆️ Update ruff	Link
Oct 25 4:34 PM	iem,main	📝 Sundry updates per review	Link
Oct 25 7:52 AM	iemone,main	🐛 Use flatpickr as better datetime UI closes #64	Link
Oct 25 7:58 AM	iemone,main	💚 Fix tests	Link
Oct 25 8:00 AM	iemone,main	💚 Address deepsource concerns	Link

Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 25 Oct 2025 - 12 AM 26 Oct 2025 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	11	0	0	0	0	0	0	1
Svr Tstorm	38	0	0	0	0	0	0	1
Flash Flood	5	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:  46 Verified:  10 [21.7%]
Polygon Size Versus County Size            [36.9%]
Average Perimeter Ratio                    [17.3%]
Percentage of Warned Area Verified (15km)  [7.8%]
Average Storm Based Warning Size           [3363 sq km]
Probability of Detection(higher is better) [0.66]
False Alarm Ratio (lower is better)        [0.78]
Critical Success Index (higher is better)  [0.20]