IEM Daily Bulletin for Dec 13 2025

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 13 December 2025

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Dec 12 10:09 AM	iem,main	✨ Add wetbulb as ASOS hourly plotting option https://mesonet.agron.iastate.edu/plotting/auto/?q=192	Link
Dec 12 10:10 AM	iem,main	⬆️ Update ruff	Link
Dec 12 9:41 AM	iem-database,main	⬆️ Update ruff	Link
Dec 12 9:42 AM	iem-database,main	✅ Add station table to asos database for testing	Link

Daily Feature

'25-'26 Winter Storm #6
Date: 12 Dec 08:10 AM
Votes: Good: 8   Bad: 1 Abstain: 0

The very active start to the winter season continued on Thursday with a compact system producing a stripe of snow from the northwest to southeast corner of the state. An inch or so was the most common with a few higher isolated reports near Fort Dodge and larger totals found over far southeastern Iowa. The next round of snow arrives this evening along with bitterly cold air for the weekend. For those of you that are already tired of winter, warmer weather does look likely next week with a number of days with temperatures above freezing.

NWS Watch/Warning Summary for 12 AM 12 Dec 2025 - 12 AM 13 Dec 2025 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.