IEM Daily Bulletin for Jun 25 2026

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 25 June 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Jun 24 7:06 AM	iem,main	🎨 Add shim for frequently typoed LSR dl url	Link
Jun 25 6:50 AM	iem,main	🚚 Migrate idep database usage to dep	Link

Daily Feature

2026 Daily Dew Point Range
Date: 24 Jun 05:30 AM
Votes: Good: 12   Bad: 0 Abstain: 0

While it felt a touch more humid on Tuesday than previous days, it was still another very pleasant June day in Iowa. Maximum dew point temperatures reached the lower 60s, but not much more than that. The featured chart presents the daily range between the minimum and maximum dew point temperature for Ames based on available hourly data for 2026. Any days with a maximum of at least 65°F are highlighted in red. You can see that such days have been rather limited this year and remarkably, April has about as many such days as any following month. While the next few days look to continue the pleasant weather, full blown summer heat and humidity look to arrive soon, so enjoy it while it lasts!

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 24 Jun 2026 - 12 AM 25 Jun 2026 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	20	0	1	0	0	0	0	1
Svr Tstorm	243	1	8	5	0	0	0	3
Flash Flood	27	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: 256 Verified:  62 [24.2%]
Polygon Size Versus County Size            [11.8%]
Average Perimeter Ratio                    [22.3%]
Percentage of Warned Area Verified (15km)  [13.0%]
Average Storm Based Warning Size           [1047 sq km]
Probability of Detection(higher is better) [0.78]
False Alarm Ratio (lower is better)        [0.76]
Critical Success Index (higher is better)  [0.23]

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