Iowa Environmental Mesonet Daily Bulletin for 21 May 2025

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp Repository Message Link
May 20 9:35 AM iem,main ✨ Add two state plot option per DEP need
https://mesonet.agron.iastate.edu/plotting/auto/?q=156
Link
May 20 1:28 PM iem,main 📝 Add IEM LSR App to dailyb github report Link
May 20 11:03 PM iem,main 🎨 Include IEM Estimated flag on records plot
https://mesonet.agron.iastate.edu/plotting/auto/?q=5
Link
May 20 9:14 AM iemlsr,main 🚧 Iterate Link
May 20 2:53 PM iemlsr,main 🚧 Iterate on features/bugs Link
May 20 3:10 PM iemlsr,main 🎨 Rework the left drawwer Link
May 20 3:44 PM iemlsr,main 🐛 Fix URL roundtripping Link
May 20 4:01 PM iemlsr,main 🐛 Fixups on realtime mode Link
May 20 10:51 PM iemlsr,main 🎨 Rethink layout Link
May 20 10:53 PM iemlsr,main 🔥 Remove fullscreen control Link


Daily Feature

Much Needed Rain
Date: 20 May 05:38 AM
Votes: Good: 20   Bad: 0 Abstain: 0

The featured map presents Iowa Flood Center estimated precipitation from Sunday through about 5 AM this Tuesday morning. Rain continues to fall this morning over the eastern half of the state, so hopefully the totals can increase over northern Iowa that are still indicated below an inch from this important rainfall event. As was shown by yesterday's feature, Iowa had been quite dry over the two weeks and this rainfall was very much needed.

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 20 May 2025 - 12 AM 21 May 2025 CDT

Summary By WFO Watches
Type USIA ARXDVNDMXOAXFSD US
Tornado 104 2 0 4 0 0 0 8
Svr Tstorm 248 1 0 3 0 0 0 3
Flash Flood 13 1 0 1 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: 347 Verified: 134 [38.6%]
Polygon Size Versus County Size            [32.5%]
Average Perimeter Ratio                    [28.5%]
Percentage of Warned Area Verified (15km)  [18.9%]
Average Storm Based Warning Size           [1561 sq km]
Probability of Detection(higher is better) [0.72]
False Alarm Ratio (lower is better)        [0.61]
Critical Success Index (higher is better)  [0.34]