IEM Daily Bulletin for Sep 23 2023
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 23 September 2023
News
No news is good newsIEM Code Pushes <to branch> on Github
- Sep 22 8:28 AM <main> refactor and add start analysis year option
https://mesonet.agron.iastate.edu/plotting/auto/?q=159 - Sep 22 9:41 AM <main> sundry review
- Sep 22 9:50 AM <main> Merge pull request #535 from akrherz/230921
Omnibus
Daily Feature
Decorah Monthly Precip
Date: 22 Sep 05:30 AM
Votes: Good: 10
Bad: 0 Abstain: 0
Yesterday's Feature mentioned the expansion of "D4" classification drought over the state of Iowa. Far northeastern Iowa was one of the two locations that got a newly designated D4, which included Decorah, which is the subject of today's featured chart. The chart presents the monthly precipitation totals over the past 20 years along with the long term mean at the bottom. This chart nicely hints at what likely saved the crops from a total disaster in the area, that being a wet cold season prior to this dry summer. Totals for November 2022 through May 2023 were close to or above average. So with this year's crop done and significant drought in play, we will likely again need a wet cold season to recharge the soil moisture.
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 22 Sep 2023 - 12 AM 23 Sep 2023 CDT
| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 2 | 2 | 0 | 2 | 0 | 0 | 0 | 0 |
| Svr Tstorm | 26 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Flash Flood | 1 | 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: 26 Verified: 8 [30.8%] Polygon Size Versus County Size [11.4%] Average Perimeter Ratio [15.7%] Percentage of Warned Area Verified (15km) [15.0%] Average Storm Based Warning Size [961 sq km] Probability of Detection(higher is better) [0.69] False Alarm Ratio (lower is better) [0.69] Critical Success Index (higher is better) [0.27]