IEM Daily Bulletin for Jun 3 2026

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 03 June 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Jun 2 12:04 PM	iem,main	📝 Sundry updates	Link
Jun 2 12:24 PM	iem,main	💚 Address codereview	Link
Jun 2 2:34 PM	iem,main	🐛 Restore bottom val	Link

Daily Feature

Another Day in the 80s
Date: 02 Jun 05:30 AM
Votes: Good: 6   Bad: 0 Abstain: 0

Monday was yet another rather warm day with high temperatures well into the 80s for most of the state. For Des Moines, it was the 19th day so far this year with a high temperature in the 80s. The featured chart presents the climatology, 2025, and 2026 totals for year to date days with a daily high temperature within the given temperature range. The totals within the 70s and 80s are both well above average for 2026, but interestingly about average for the 60s. The forecast for the rest of the week looks to continue totaling up days with highs in the 80s.

The featured media can be generated on-demand here

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

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	2	0	0	0	0	0	0	0
Svr Tstorm	206	0	0	0	0	1	0	2
Flash Flood	29	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: 207 Verified:  70 [33.8%]
Polygon Size Versus County Size            [14.8%]
Average Perimeter Ratio                    [21.3%]
Percentage of Warned Area Verified (15km)  [14.1%]
Average Storm Based Warning Size           [1439 sq km]
Probability of Detection(higher is better) [0.74]
False Alarm Ratio (lower is better)        [0.66]
Critical Success Index (higher is better)  [0.30]

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