Alert archive / Guam / Special Marine Warnings
Special Marine Warnings in Guam, 2020
10 special marine warnings in 2020. 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
- 10
- Busiest month
- November5 special marine warnings
- Busiest day
- September 13, 20202 special marine warnings
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 9:39 AM CDT | Special Marine Warning | GUM | 2 hr | |
| Sep 12, 10:50 PM CDT | Special Marine Warning | GUM | 115 min | |
| Sep 13, 5:05 AM CDT | Special Marine Warning | GUM | 85 min | |
| Oct 29, 3:50 PM CDT | Special Marine Warning | GUM | 55 min | |
| Oct 29, 8:33 PM CDT | Special Marine Warning | GUM | 57 min | |
| Nov 9, 10:11 AM CST | Special Marine Warning | GUM | 49 min | |
| Nov 9, 10:11 AM CST | Special Marine Warning | GUM | 49 min | |
| Nov 22, 7:56 PM CST | Special Marine Warning | GUM | 64 min | |
| Nov 22, 8:58 PM CST | Special Marine Warning | GUM | 2 hr | |
| Nov 24, 6:36 AM CST | Special Marine Warning | GUM | 54 min |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.