Special Marine Warnings in Illinois
1,345 special marine warnings since 1986. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of special marine warnings reaches back to 1986.
Special Marine Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Special Marine Warnings
- 1,345
- Busiest year
- 2004119 special marine warnings
- Average year
- 52over 26 years on file
Over time
By year
Before October 2007 these were issued for whole counties, and a storm crossing three counties was often three warnings; since then one polygon follows the storm. The count changed with the practice, not only with the weather.
By month of the year
The latest special marine warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 11:12 PM CDT | Special Marine Warning | LOT | 42 min | |
| Sep 4, 10:39 PM CDT | Special Marine Warning | LOT | 81 min | |
| Sep 4, 10:26 PM CDT | Special Marine Warning | LOT | 83 min | |
| Sep 3, 11:19 AM CDT | Special Marine Warning | LOT | 37 min | |
| Aug 18, 9:18 PM CDT | Special Marine Warning | LOT | 86 min | |
| Aug 18, 7:36 PM CDT | Special Marine Warning | LOT | 114 min | |
| Aug 16, 12:44 AM CDT | Special Marine Warning | LOT | 109 min | |
| Aug 12, 9:27 AM CDT | Special Marine Warning | LOT | 2 hr | |
| Aug 11, 10:09 AM CDT | Special Marine Warning | LOT | 2 hr | |
| Aug 11, 3:34 AM CDT | Special Marine Warning | LOT | 86 min | |
| Aug 11, 12:30 AM CDT | Special Marine Warning | LOT | 67 min | |
| Aug 10, 12:40 AM CDT | Special Marine Warning | LOT | 45 min |
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.