IEM Daily Bulletin for Jul 10 2025

[daryl herzmann]

Iowa Environmental Mesonet Daily Bulletin for 10 July 2025

News

No news is good news

IEM Code Pushes <repo,branch> on Github

Timestamp	Repository	Message	Link
Jul 9 5:10 PM	iem,main	🐛 Fix excel export	Link

Daily Feature

Comprehensive Climate Index
Date: 09 Jul 05:30 AM
Votes: Good: 13   Bad: 2 Abstain: 1

The Comprehensive Climate Index (CCI) is a weather variable composite index that combines air temperature, wind speed, relative humidity, and solar radiation. The CCI is typically presented as either a no-shade or shade option, which attempts to better account for the cooling effect of having shade available, which is something unaccounted for by more traditional indices like heat index. The featured map presents a grid calculation based on NOAA HRRR model data valid 3 PM Tuesday. The index is typically shown within the ranges found in the legend. So a number of locations yesterday were shown in the severe category for CCI. Look for more IEM tooling to come to show various CCI statistics and climatologies.

The featured media can be generated on-demand here

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NWS Watch/Warning Summary for 12 AM 9 Jul 2025 - 12 AM 10 Jul 2025 CDT

	Summary		By WFO					Watches
Type	US	IA	ARX	DVN	DMX	OAX	FSD	US
Tornado	7	0	0	0	0	0	0	0
Svr Tstorm	181	0	0	0	0	4	6	4
Flash Flood	67	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: 184 Verified:  94 [51.1%]
Polygon Size Versus County Size            [30.5%]
Average Perimeter Ratio                    [28.8%]
Percentage of Warned Area Verified (15km)  [18.8%]
Average Storm Based Warning Size           [2056 sq km]
Probability of Detection(higher is better) [0.71]
False Alarm Ratio (lower is better)        [0.49]
Critical Success Index (higher is better)  [0.42]