IEM Daily Bulletin for Feb 17 2026
daryl herzmann
Iowa Environmental Mesonet Daily Bulletin for 17 February 2026
News
No news is good newsIEM Code Pushes <repo,branch> on Github
| Timestamp | Repository | Message | Link |
|---|---|---|---|
| Feb 16 1:12 PM | iem,main | 📝 Sundry updates per log review | Link |
| Feb 16 1:22 PM | iem,main | ✏️ Fix format typo | Link |
Daily Feature
Six Days of 60+°F
Date: 16 Feb 05:30 AM
Votes: Good: 14
Bad: 1 Abstain: 0
The very nice weather for mid February continued on Sunday with highs into the 60s for most of Iowa. For Des Moines, the high reached 65°F and made for the third consecutive day with a high temperature of at least 60°F. The current NWS forecast has this current streak lasting till Wednesday, which would make for six straight days. The featured chart presents some metrics on such streaks for Des Moines with the side tables listing the earliest and latest such dates on record. If the current streak reaches Wednesday, it would be three days earlier than the streak shown in 2017 first ending on 21 February. Note that the second earliest streak ended a day later as this chart is considering any six day streak including those that were a part of a longer than six day streak, so that is why you see some streaks over subsequent days listed.
The featured media can be generated on-demand here
.NWS Watch/Warning Summary for 12 AM 16 Feb 2026 - 12 AM 17 Feb 2026 CST
| Summary | By WFO | Watches | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | US | IA | ARX | DVN | DMX | OAX | FSD | US |
| Tornado | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Svr Tstorm | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Flash Flood | 4 | 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: 5 Verified: 1 [20.0%] Polygon Size Versus County Size [20.1%] Average Perimeter Ratio [2.6%] Percentage of Warned Area Verified (15km) [8.5%] Average Storm Based Warning Size [1594 sq km] Probability of Detection(higher is better) [0.23] False Alarm Ratio (lower is better) [0.80] Critical Success Index (higher is better) [0.12]