Iowa Environmental Mesonet Daily Bulletin for 10 May 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp Repository Message Link
May 9 7:43 AM iem,main 🐛 Prevent nul byte in madis presentwx ingest Link


Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 9 May 2026 - 12 AM 10 May 2026 CDT

Summary By WFO Watches
Type USIA ARXDVNDMXOAXFSD US
Tornado 0 0 0 0 0 0 0 0
Svr Tstorm 83 0 0 0 0 0 0 2
Flash Flood 7 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:  83 Verified:  33 [39.8%]
Polygon Size Versus County Size            [28.5%]
Average Perimeter Ratio                    [24.4%]
Percentage of Warned Area Verified (15km)  [14.9%]
Average Storm Based Warning Size           [2374 sq km]
Probability of Detection(higher is better) [0.77]
False Alarm Ratio (lower is better)        [0.60]
Critical Success Index (higher is better)  [0.35]

IEMBot Social Media Posts

IEMBot can be configured to post messages to a number of social media services. More details: IEMBot Homepage.

Posts yesterday per supported service: