IEM Daily Bulletin for Oct 11 2025

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 11 October 2025

News

No news is good news

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Daily Feature

80+°F Monthly Frequencies
Date: 10 Oct 05:30 AM
Votes: Good: 6   Bad: 0 Abstain: 0

Daily high temperatures have steadily warmed this week with even warmer temperatures expected for the weekend. There's an outside chance that Ames could hit 80°F on Sunday, which would be the sixth such day this October. The featured chart looks into the monthly frequencies and percentiles of a daily high temperature of at least 80°F for Ames. The long term average number of such days during October is around three, so this year has already bested that average by two days. If you like such weather, you should certainly savor it as meaningful frequencies of such days does not return until next April!

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 10 Oct 2025 - 12 AM 11 Oct 2025 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	0	0	0	0	0	0	0	0
Svr Tstorm	6	0	0	0	0	0	0	0
Flash Flood	14	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:   6 Verified:   0 [0.0%]
Polygon Size Versus County Size            [2.3%]
Average Perimeter Ratio                    [5.8%]
Percentage of Warned Area Verified (15km)  [0.0%]
Average Storm Based Warning Size           [482 sq km]
Probability of Detection(higher is better) [0.00]
False Alarm Ratio (lower is better)        [1.00]
Critical Success Index (higher is better)  [0.00]