IEM Daily Bulletin for Jan 3 2026

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 03 January 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Jan 2 8:02 AM	iem,main	📝 Sundry updates per log review	Link

Daily Feature

Sioux City vs Burlington
Date: 02 Jan 05:30 AM
Votes: Good: 7   Bad: 0 Abstain: 1

The first day of 2026 started off a bit chilly with afternoon temperatures below freezing for nearly the entire state. Both Burlington (SE Iowa) and Sioux City (NW Iowa) had afternoon high temperatures of 28°F and that is the subject of today's feature chart. The top panel presents the difference in afternoon high temperature between the two sites by week of the year. The darker green colors indicate higher frequency and a simple weekly average is fit to the data with the plotted line. The bottom panel partitions the temperature difference by Sioux City average wind speed over the afternoon period. The top panel shows the difference between the two sites is the strongest during the cold half of the year, but the magnitude is only a few degrees.

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 2 Jan 2026 - 12 AM 3 Jan 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	0	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.