IEM Daily Bulletin for Dec 25 2025

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 25 December 2025

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Dec 24 11:42 AM	pyiem,main	⬆️ Update ruff	Link
Dec 24 12:20 PM	pyiem,main	📝 Sundry tweaks	Link

Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 24 Dec 2025 - 12 AM 25 Dec 2025 CST

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	1	0	0	0	0	0	0	0
Svr Tstorm	6	0	0	0	0	0	0	0
Flash Flood	34	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:   7 Verified:   1 [14.3%]
Polygon Size Versus County Size            [10.6%]
Average Perimeter Ratio                    [21.0%]
Percentage of Warned Area Verified (15km)  [33.2%]
Average Storm Based Warning Size           [982 sq km]
Probability of Detection(higher is better) [0.48]
False Alarm Ratio (lower is better)        [0.86]
Critical Success Index (higher is better)  [0.12]