IEM Daily Bulletin for Apr 14 2026

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 14 April 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Apr 13 10:12 AM	iem-web-services,main	📝 Update hardcoded addresses :/	Link
Apr 13 10:39 AM	iem-web-services,main	🎨 Use .local FQDNs for backends, sigh	Link
Apr 13 11:01 AM	iem-web-services,main	🎨 Address meteobridge lint/coverage	Link

Daily Feature

April 60+°F Low Temps
Date: 13 Apr 05:30 AM
Votes: Good: 16   Bad: 0 Abstain: 1

Warm and rather muggy for April weather is forecast for much of this week along with continued chances of rain. Daily low temperatures will be rather warm, buoyed by the aforementioned humid conditions. A daily low temperature of 60°F may be possible this week and such events are somewhat rare for April. The featured chart presents the frequency of a given day of April having such a warm low temperature for Ames. Each bar is labelled with the number of such events on record with the bar height plotting the frequency. Overall, these events are a one in three year recurrence.

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 13 Apr 2026 - 12 AM 14 Apr 2026 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	32	7	6	0	5	0	2	2
Svr Tstorm	196	25	24	1	12	0	17	4
Flash Flood	17	0	1	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: 219 Verified:  84 [38.4%]
Polygon Size Versus County Size            [27.5%]
Average Perimeter Ratio                    [35.6%]
Percentage of Warned Area Verified (15km)  [21.0%]
Average Storm Based Warning Size           [1059 sq km]
Probability of Detection(higher is better) [0.83]
False Alarm Ratio (lower is better)        [0.62]
Critical Success Index (higher is better)  [0.36]

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