IEM Daily Bulletin for May 3 2026

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daryl herzmann

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May 3, 2026, 8:12:25 AMMay 3
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Iowa Environmental Mesonet Daily Bulletin for 03 May 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp Repository Message Link
May 2 7:16 AM iem,main ♻️ Use json_response_dict helper Link
May 2 7:17 AM iem,main ⬆️ Update eslint precommit Link
May 2 7:22 AM iem,main ✏️ Fix typo Link


Daily Feature

No feature posted

NWS Watch/Warning Summary for 12 AM 2 May 2026 - 12 AM 3 May 2026 CDT

Summary By WFO Watches
Type USIA ARXDVNDMXOAXFSD US
Tornado 0 0 0 0 0 0 0 1
Svr Tstorm 8 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:   8 Verified:   3 [37.5%]
Polygon Size Versus County Size            [21.1%]
Average Perimeter Ratio                    [12.5%]
Percentage of Warned Area Verified (15km)  [18.9%]
Average Storm Based Warning Size           [1213 sq km]
Probability of Detection(higher is better) [0.80]
False Alarm Ratio (lower is better)        [0.62]
Critical Success Index (higher is better)  [0.34]

IEMBot Social Media Posts

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