Iowa Environmental Mesonet Daily Bulletin for 01 January 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp Repository Message Link
Dec 31 12:17 PM iem,main ✨ Add records years to CLI mapper
https://mesonet.agron.iastate.edu/nws/climap.php
Link
Dec 31 12:18 PM iem,main 📝 Sundry updates per log review Link
Dec 31 3:03 PM iem,main 🎨 Cleanup python warning lint Link
Dec 31 3:56 PM iem,main 🎨 Workaround GFS grid projection issue Link
Dec 31 4:18 PM iem,main 📝 Bump hard code to 2026 Link
Jan 1 5:45 AM iem,main 🐛 Correct monthly aggregate Link
Dec 31 6:17 AM iemvtec,main ⬆️ Update npm deps Link
Dec 31 6:19 AM iemvtec,main 🐛 Load data after clicking event in List Events Link
Dec 31 6:26 AM iemvtec,main ✨ Use TomSelect for large selects Link
Dec 31 6:28 AM iemvtec,main 📝 Sundry ARIA Link
Dec 31 6:32 AM iemvtec,main 💚 Patch around test failure, for now Link


Daily Feature

LSR Sources for Snow Reports
Date: 31 Dec 05:30 AM
Votes: Good: 8   Bad: 0 Abstain: 1

You may enjoy the snowfall event maps generated by the IEM. One of the data sources used to generate the map comes from National Weather Service Local Storm Reports (LSR)s. A recent LSR example shows the location and reported amounts of accumulated snowfall. Each LSR also contains a source designation, which is the subject of today's featured chart. For NWS Des Moines, the chart presents the yearly rank of LSR source for number of snow reports with one representing the source with the largest number of reports for the year. The left and right axis labels show the ranks for the 2006 and 2025 years respectively with the lines showing the yearly progression of that source. General public reports of snowfall are a very important component of this information source. It should be denoted though that the "CO-OP Observer" and "CoCoRaHS" counts are only those included in LSRs. Both of these networks contribute many thousand such reports within a given year and their data is available within other products than LSRs.

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 31 Dec 2025 - 12 AM 1 Jan 2026 CST

Summary By WFO Watches
Type USIA ARXDVNDMXOAXFSD 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.