IEM Daily Bulletin for Jul 20 2024

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 20 July 2024

News

No news is good news

IEM Code Pushes <to branch> on Github

• Jul 19 7:04 AM <main> Merge pull request #846 from akrherz/240718-4
  Omnibus
• Jul 19 9:36 AM <main> mnt: migrate to pydantic
• Jul 19 9:36 AM <main> refactor htdocs python content into pylib
• Jul 19 10:15 AM <main> add mod_wsgi startup for tc processes
• Jul 19 10:25 AM <main> Merge pull request #847 from akrherz/240719
  Omnibus
• Jul 19 1:07 PM <main> mnt: sundry updates per log review
• Jul 19 1:22 PM <main> fix: recify tz check
• Jul 19 1:34 PM <main> Merge pull request #848 from akrherz/240719-2
  mnt: sundry updates per log review
• Jul 20 5:59 AM <240719-3> mnt: drop warning message
• Jul 20 6:26 AM <240719-3> some wip thrashing on ISD ingest
• Jul 20 6:33 AM <240719-3> mnt: sundry updates per log review

Daily Feature

Low July Dew Points
Date: 19 Jul 05:30 AM
Votes: Good: 9   Bad: 0 Abstain: 0

After a muggy Sunday and Monday, the rest of this week has been a mid summer treat with sunshine, a breeze, below average temperatures, and very low humidity values. To illustrate the low humidity, the featured chart presents some July dew point metrics based on period of record data for the Ames airport. The bottom left panel is the most relevant as it presents hourly dew point percentiles for this month. The side panel to it shows a ten percentage point binned frequency. Much of this month has been spent below the 50th percentile and the days since Monday have been below the 10th percentile! Humidity levels will be on the increase along with chances of rain again, but a return of significant heat does not seem likely for the next week or so.

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 19 Jul 2024 - 12 AM 20 Jul 2024 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	2	0	0	0	0	0	0	0
Svr Tstorm	93	0	0	0	0	2	0	3
Flash Flood	21	0	0	0	0	2	2	---

ARX = LaCrosse, WI DVN = Davenport, IA DMX = Des Moines, IA OAX = Omaha, NE FSD = Sioux Falls, SD

IEM Cow Report

SVR+TOR Warnings Issued:  90 Verified:  31 [34.4%]
Polygon Size Versus County Size            [18.8%]
Average Perimeter Ratio                    [24.7%]
Percentage of Warned Area Verified (15km)  [16.6%]
Average Storm Based Warning Size           [1334 sq km]
Probability of Detection(higher is better) [0.56]
False Alarm Ratio (lower is better)        [0.66]
Critical Success Index (higher is better)  [0.27]