IEM Daily Bulletin for Feb 11 2026

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 11 February 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Feb 10 9:42 AM	iem,main	🐛 Fix feature layout when using highcharts	Link
Feb 9 12:36 PM	iem,main	📝 Update precommit badge	Link
Feb 10 11:35 AM	iem,main	🎨 Improve error message	Link
Feb 10 3:13 PM	iem,main	🎨 Workaround watches never valid :/	Link
Feb 11 5:29 AM	pyiem,main	📝 Add DSM... channel to dsm jabber msgs	Link

Daily Feature

Sioux City 13°F Record Beat
Date: 10 Feb 05:30 AM
Votes: Good: 15   Bad: 0 Abstain: 0

Very warm air aloft, just above a strong and shallow surface inversion, was able to "mix down" on Monday allowing for temperatures to soar to record levels at a number of locations across Iowa. Sioux City was able to reach a high 75°F, which beat the record high temperature for 9 February by a 13°F margin! The featured chart presents the record maximum high and minimum low temperature beat margins. Note that the low temperature beat margins are presented as negative values for plotting legibility / comparison. One has to go a considerable way back to find a larger high temperature beat margin. 29 Feb 1992 would be a candidate at 14°F, but being leap day makes the record margin perhaps less significant as the period of record of that calendar date is much smaller. 7 Feb 1987 at 17°F is next date with a larger margin, so either way it has been a while!

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 10 Feb 2026 - 12 AM 11 Feb 2026 CST

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	0	0	0	0	0	0	0	0
Svr Tstorm	0	0	0	0	0	0	0	0
Flash Flood	1	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

No SVR+TOR Warnings Issued.