Iowa Environmental Mesonet Daily Bulletin for 01 May 2025

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp Repository Message Link
Apr 30 8:15 AM iem,main 💚 Increase coverage Link
Apr 30 2:19 PM iem,main 📝 Sundry updates per log review Link
Apr 30 5:33 PM pyiem,main ⬆️ Update ruff and bump python to 3.10 Link
Apr 30 5:34 PM pyiem,main 🎨 Test python 3.10 to 3.13 Link
Apr 30 5:35 PM pyiem,main [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
Link
Apr 30 3:17 PM iemone,main ✅ Attempt test infrastucture Link
Apr 30 3:34 PM iemone,main 🐛 Resolve circular import in state Link
Apr 30 3:49 PM iemone,main ✅ Add coverage for state.js Link
Apr 30 3:50 PM iemone,main 📝 Add badge Link
Apr 30 3:57 PM iemone,main 💚 Address deepsource concerns Link


Daily Feature

April Daily Wind
Date: 30 Apr 05:30 AM
Votes: Good: 15   Bad: 0 Abstain: 0

After a windy Monday, windy conditioned continued overnight and into Tuesday before dying down by evening. The featured chart presents IEM computed daily average wind speed and direction for Des Moines so far this month. A simple and smoothed long term average is plotted as well. The perception that Iowa's weather is windier during the spring than previous years can be difficult to prove one way or another. This plot shows less than half of the days plotted above the daily average for wind speed. Wind speeds forecast for the last day of April (today) look to come in at about an average value for the date.

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 30 Apr 2025 - 12 AM 1 May 2025 CDT

Summary By WFO Watches
Type USIA ARXDVNDMXOAXFSD US
Tornado 27 0 0 0 0 0 0 4
Svr Tstorm 191 0 0 0 0 0 0 3
Flash Flood 60 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: 218 Verified:  75 [34.4%]
Polygon Size Versus County Size            [35.4%]
Average Perimeter Ratio                    [28.1%]
Percentage of Warned Area Verified (15km)  [10.2%]
Average Storm Based Warning Size           [2232 sq km]
Probability of Detection(higher is better) [0.78]
False Alarm Ratio (lower is better)        [0.66]
Critical Success Index (higher is better)  [0.31]