IEM Daily Bulletin for Aug 10 2025

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 10 August 2025

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Aug 9 6:18 PM	pyiem,main	✅ Add test for old-bug not currently present	Link
Aug 9 6:19 PM	pyiem,main	⬆️ Update ruff	Link
Aug 9 11:45 AM	iem-database,main	⬆️ Update ruff	Link
Aug 9 11:49 AM	iem-database,main	📝 Add some constraints to spc_outlook table	Link

Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 9 Aug 2025 - 12 AM 10 Aug 2025 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	7	0	0	0	0	0	0	0
Svr Tstorm	147	24	1	0	10	15	5	5
Flash Flood	7	2	0	0	0	1	1	---

ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD

IEM Cow Report

SVR+TOR Warnings Issued: 148 Verified:  64 [43.2%]
Polygon Size Versus County Size            [22.4%]
Average Perimeter Ratio                    [25.2%]
Percentage of Warned Area Verified (15km)  [25.3%]
Average Storm Based Warning Size           [1675 sq km]
Probability of Detection(higher is better) [0.90]
False Alarm Ratio (lower is better)        [0.57]
Critical Success Index (higher is better)  [0.41]