Iowa Environmental Mesonet Daily Bulletin for 22 April 2026

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp Repository Message Link
Apr 21 8:31 AM iem,main 📝 Sundry updates per log review Link
Apr 21 8:49 AM iem,main 💚 Address CI failure Link
Apr 21 2:52 PM iem,main 📝 Sundry updates per log review Link
Apr 21 10:04 PM iem,main 🐛 Cleanups and fix frequency unit Link
Apr 21 2:36 PM pyiem,main 🎨 Allow ip_throttle to be callable Link
Apr 21 3:32 PM pyiem,main 🎨 Fix how ip_throttle gets called Link
Apr 21 6:40 PM pyiem,main 🚚 Move ip_throttle to prevent telemetry write Link
Apr 21 6:58 PM pyiem,main ♻️ Refactor iemapp, no functional changes Link
Apr 21 7:26 PM pyiem,main 🎨 QoL for iemapp by improving docs, exp handling Link
Apr 21 7:48 PM iem-web-services,main ⚡️ Prevent cache busting in hotspot AFOS List Link


Daily Feature

Dubuque 88 MPH Gust
Date: 21 Apr 05:30 AM
Votes: Good: 16   Bad: 0 Abstain: 2

With the quiet weather to start this week, the National Weather Service continues to work through the backlog of severe weather reports and completing storm surveys from the activate previous week. One of those reports was a 88 MPH wind gust from the Dubuque Airport last Tuesday. The one minute interval data from NCEI is now available from this event and the subject of today's featured chart. The chart the one minute interval data between 6 and 7 PM on 14 April 2026 for Dubuque. Sadly, there is a brief drop out of the wind data prior to the 88 MPH gust, but the peak is shown with three minutes of gusts over 80 MPH and sustained winds over 55 MPH. You can find more details along with RADAR for the NWS Severe Thunderstorm Warning covering this event.

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 21 Apr 2026 - 12 AM 22 Apr 2026 CDT

Summary By WFO Watches
Type USIA ARXDVNDMXOAXFSD US
Tornado 3 0 0 0 0 0 0 0
Svr Tstorm 17 0 0 0 0 0 0 0
Flash Flood 1 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:  20 Verified:   3 [15.0%]
Polygon Size Versus County Size            [3.9%]
Average Perimeter Ratio                    [5.5%]
Percentage of Warned Area Verified (15km)  [8.6%]
Average Storm Based Warning Size           [640 sq km]
Probability of Detection(higher is better) [0.44]
False Alarm Ratio (lower is better)        [0.85]
Critical Success Index (higher is better)  [0.13]

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