IEM Daily Bulletin for Mar 5 2025

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 05 March 2025

News

No news is good news

IEM Code Pushes <to branch> on Github

• Mar 4 9:18 AM <main> 📝 Sundry rollup for fixes
• Mar 4 9:45 AM <main> Merge pull request #1146 from akrherz/250303-3
  Omnibus
• Mar 4 11:46 AM <main> ✅ Address deepsource concern
• Mar 4 12:15 PM <main> Merge pull request #1147 from akrherz/240304-2
  ✅ Address deepsource concern

Daily Feature

Busy Morning
Date: 04 Mar 05:39 AM
Votes: Good: 21   Bad: 1 Abstain: 0

It is a busy morning for weather with a significant winter storm strengthening over the High Plains and about to plow eastward. The featured chart presents an IEM accounting of population currently under a given NWS alert headline. A good portion of Iowa is now under a Blizzard Warning for tonight into about noon tomorrow as extreme winds will likely blow around whatever snow that falls. Further to the south, an outbreak of severe weather is expected. If there is any good news, welcome moisture will fall over the state with plenty of rain before a transition to snow.

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 4 Mar 2025 - 12 AM 5 Mar 2025 CST

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	43	0	0	0	0	0	0	5
Svr Tstorm	171	0	0	0	0	0	0	2
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

SVR+TOR Warnings Issued: 203 Verified:  80 [39.4%]
Polygon Size Versus County Size            [46.3%]
Average Perimeter Ratio                    [42.8%]
Percentage of Warned Area Verified (15km)  [12.9%]
Average Storm Based Warning Size           [3457 sq km]
Probability of Detection(higher is better) [0.77]
False Alarm Ratio (lower is better)        [0.61]
Critical Success Index (higher is better)  [0.35]