IEM Daily Bulletin for Aug 16 2025
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 16 August 2025
News
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Daily Feature
Setting Records
Date: 15 Aug 05:30 AM
Votes: Good: 9
Bad: 0 Abstain: 0
The daily feature to start off this week highlighted a top 10 daily rainfall for Dubuque on Sunday, which was also a daily record for the site. The featured chart total follows up on this by plotting the number of newly set daily records by year for the site. The top panel shows maximum high temperatures, middle panel shows minimum low temperatures, and the bottom panel shows precipitation records. The line on each plot is a simple 365 divided by the number of years on record to represent an estimate of the number of new records possible that year. The color of the bars differentiate years above or below this 365/n line. The nicely nicely shows a common problem with long term climate site, in that they often move and this move can put them in a significantly different micro-climate. For Dubuque, prior t o the early 1950s, the site was along the Mississippi River in the valley and afterwards moved to the airport up on the bluffs and away from the river! You can easily see the dramatic increase in low temperature records being set and limited new high temperatures.
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 15 Aug 2025 - 12 AM 16 Aug 2025 CDT
| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Svr Tstorm | 86 | 18 | 6 | 4 | 9 | 6 | 4 | 5 |
| Flash Flood | 16 | 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: 82 Verified: 34 [41.5%] Polygon Size Versus County Size [20.0%] Average Perimeter Ratio [28.6%] Percentage of Warned Area Verified (15km) [14.7%] Average Storm Based Warning Size [1970 sq km] Probability of Detection(higher is better) [0.68] False Alarm Ratio (lower is better) [0.59] Critical Success Index (higher is better) [0.35]