Weather alerts in Guam, 2018
170 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
- Alerts
- 170
- Warnings
- 25
- Watches
- 35
- Advisories
- 86
- Busiest month
- September33 alerts
- Busiest day
- August 19, 20186 alerts
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 |
|---|---|---|---|---|
| Jan 3, 1:21 AM CST | High Surf Advisory | GUM | 4 days | |
| Jan 5, 5:58 AM CST | Small Craft Advisory | GUM | 19 hr | |
| Jan 7, 12:11 PM CST | Small Craft Advisory for Winds | GUM | 30 hr | |
| Jan 14, 12:56 AM CST | High Surf Advisory | GUM | 49 hr | |
| Jan 14, 2:10 PM CST | Rip Current Statement | GUM | 36 hr | |
| Jan 17, 3:18 AM CST | Rip Current Statement | GUM | 7 days | |
| Jan 17, 3:18 AM CST | Small Craft Advisory | GUM | 33 hr | |
| Jan 17, 3:18 AM CST | High Surf Advisory | GUM | 33 hr | |
| Jan 19, 1:01 AM CST | Fire Weather Watch | GUM | 3 days | |
| Jan 19, 4:30 PM CST | Fire Weather Watch | GUM | 59 hr | |
| Jan 20, 5:54 PM CST | Fire Weather Watch | GUM | 33 hr | |
| Jan 21, 7:01 PM CST | Fire Weather Watch | GUM | 31 hr | |
| Jan 21, 10:15 PM CST | Small Craft Advisory | GUM | 15 hr | |
| Jan 22, 7:46 PM CST | Fire Weather Watch | GUM | 6 hr | |
| Jan 23, 1:22 AM CST | Fire Weather Watch | GUM | 38 min | |
| Jan 26, 8:46 PM CST | High Surf Advisory | GUM | 4 days | |
| Jan 26, 11:37 PM CST | Rip Current Statement | GUM | 4 days | |
| Jan 27, 7:44 PM CST | Red Flag Warning | GUM | 57 days | |
| Jan 28, 12:01 PM CST | Small Craft Advisory for Hazardous Seas | GUM | 26 hr | |
| Jan 28, 6:58 PM CST | Fire Weather Watch | GUM | 8 hr | |
| Jan 29, 12:35 AM CST | Fire Weather Watch | GUM | 26 hr | |
| Jan 29, 12:41 PM CST | Small Craft Advisory | GUM | 7 hr | |
| Jan 29, 12:42 PM CST | Fire Weather Watch | GUM | 14 hr | |
| Jan 30, 2:23 PM CST | Small Craft Advisory | GUM | 10 hr | |
| Jan 31, 12:52 AM CST | Small Craft Advisory for Winds | GUM | 13 hr | |
| Feb 8, 12:16 PM CST | Small Craft Advisory for Winds | GUM | 12 hr | |
| Feb 9, 12:10 AM CST | High Surf Advisory | GUM | 62 hr | |
| Feb 9, 12:12 AM CST | Small Craft Advisory | GUM | 48 hr | |
| Feb 9, 12:43 PM CST | Rip Current Statement | GUM | 49 hr | |
| Feb 14, 4:21 PM CST | Rip Current Statement | GUM | 70 hr | |
| Feb 20, 12:11 AM CST | Rip Current Statement | GUM | 36 hr | |
| Feb 20, 12:11 AM CST | High Surf Advisory | GUM | 36 hr | |
| Feb 26, 6:58 PM CST | Fire Weather Watch | GUM | 3 days | |
| Mar 1, 6:36 PM CST | Fire Weather Watch | GUM | 15 days | |
| Mar 3, 4:48 PM CST | Red Flag Warning | GUM | 23 days | |
| Mar 3, 4:48 PM CST | Red Flag Warning | GUM | 24 days | |
| Mar 4, 3:28 AM CST | Fire Weather Watch | GUM | 13 days | |
| Mar 4, 6:10 PM CST | Fire Weather Watch | GUM | 12 days | |
| Mar 13, 3:30 AM CDT | High Surf Advisory | GUM | 33 hr | |
| Mar 15, 12:50 PM CDT | Rip Current Statement | GUM | 5 days | |
| Mar 16, 7:09 PM CDT | Fire Weather Watch | GUM | 9 hr | |
| Mar 17, 8:23 PM CDT | Fire Weather Watch | GUM | 31 hr | |
| Mar 18, 5:14 PM CDT | Fire Weather Watch | GUM | 5 days | |
| Mar 18, 5:14 PM CDT | Red Flag Warning | GUM | 11 hr | |
| Mar 21, 7:28 PM CDT | Fire Weather Watch | GUM | 56 hr | |
| Mar 22, 7:35 PM CDT | Fire Weather Watch | GUM | 4 days | |
| Mar 23, 4:01 PM CDT | Small Craft Advisory | GUM | 69 hr | |
| Mar 23, 7:26 PM CDT | Fire Weather Watch | GUM | 3 days | |
| Mar 24, 8:13 PM CDT | Fire Weather Watch | GUM | 56 hr | |
| Mar 25, 7:23 PM CDT | Fire Weather Watch | GUM | 33 hr | |
| Mar 26, 4:52 PM CDT | Fire Weather Watch | GUM | 35 hr | |
| Mar 26, 7:15 PM CDT | Small Craft Advisory | GUM | 31 hr | |
| Mar 27, 4:11 AM CDT | Fire Weather Watch | GUM | 24 hr | |
| Mar 31, 3:28 PM CDT | High Surf Advisory | GUM | 3 days | |
| Mar 31, 8:05 PM CDT | Small Craft Advisory for Winds | GUM | 8 hr | |
| Apr 1, 4:43 AM CDT | Rip Current Statement | GUM | 70 hr | |
| Apr 2, 2:17 AM CDT | Small Craft Advisory for Hazardous Seas | GUM | 4 days | |
| Apr 5, 1:59 PM CDT | Rip Current Statement | GUM | 25 hr | |
| Apr 6, 5:52 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Apr 14, 12:03 AM CDT | Small Craft Advisory for Winds | GUM | 14 hr | |
| May 16, 9:23 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| May 17, 2:30 AM CDT | Areal Flood Advisory | GUM | 60 min | |
| Jun 2, 11:35 PM CDT | Small Craft Advisory for Winds | GUM | 15 hr | |
| Jul 2, 6:35 PM CDT | Tropical Storm Watch | GUM | 48 hr | |
| Jul 3, 6:43 AM CDT | Tropical Storm Warning | GUM | 47 hr | |
| Jul 4, 1:29 AM CDT | Flash Flood Watch | GUM | 36 hr | |
| Jul 4, 1:16 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Jul 5, 2:20 AM CDT | Small Craft Advisory | GUM | 35 hr | |
| Jul 5, 1:07 PM CDT | High Surf Advisory | GUM | 72 hr | |
| Jul 22, 2:16 AM CDT | Flash Flood Watch | GUM | 23 hr | |
| Jul 25, 10:11 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Aug 2, 2:51 PM CDT | Small Craft Advisory | GUM | 71 hr | |
| Aug 3, 1:40 AM CDT | Rip Current Statement | GUM | 71 hr | |
| Aug 3, 1:40 AM CDT | High Surf Advisory | GUM | 71 hr | |
| Aug 6, 2:00 AM CDT | Rip Current Statement | GUM | 47 hr | |
| Aug 6, 2:00 AM CDT | High Surf Advisory | GUM | 47 hr | |
| Aug 13, 12:15 AM CDT | Areal Flood Advisory | GUM | 66 hr | |
| Aug 15, 12:47 AM CDT | Small Craft Advisory | GUM | 50 hr | |
| Aug 15, 3:37 PM CDT | High Surf Advisory | GUM | 35 hr | |
| Aug 18, 11:42 PM CDT | Tropical Storm Watch | GUM | 18 hr | |
| Aug 19, 1:44 AM CDT | Small Craft Advisory | GUM | 58 hr | |
| Aug 19, 1:45 AM CDT | Rip Current Statement | GUM | 71 hr | |
| Aug 19, 1:45 AM CDT | High Surf Advisory | GUM | 71 hr | |
| Aug 19, 1:46 AM CDT | Flash Flood Warning | GUM | 3 hr | |
| Aug 19, 5:38 PM CDT | Tropical Storm Warning | GUM | 24 hr | |
| Aug 20, 7:32 PM CDT | Flash Flood Warning | GUM | 4 hr | |
| Aug 20, 10:35 PM CDT | Flash Flood Warning | GUM | 4 hr | |
| Aug 20, 11:15 PM CDT | Flash Flood Warning | GUM | 3 hr | |
| Aug 21, 2:03 AM CDT | Flash Flood Warning | GUM | 4 hr | |
| Aug 30, 3:43 AM CDT | Rip Current Statement | GUM | 23 hr | |
| Aug 30, 3:43 AM CDT | Small Craft Advisory | GUM | 23 hr | |
| Aug 30, 3:43 AM CDT | High Surf Advisory | GUM | 23 hr | |
| Sep 1, 1:38 PM CDT | High Surf Advisory | GUM | 37 hr | |
| Sep 5, 9:15 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Sep 8, 8:00 AM CDT | Typhoon Watch | GUM | 17 hr | |
| Sep 9, 12:42 AM CDT | Typhoon Warning | GUM | 40 hr | |
| Sep 10, 1:15 AM CDT | Areal Flood Advisory | GUM | 9 hr | |
| Sep 10, 4:18 AM CDT | Flash Flood Warning | GUM | 6 hr | |
| Sep 10, 5:42 AM CDT | Flash Flood Warning | GUM | 5 hr | |
| Sep 10, 3:52 PM CDT | Hurricane Local Statement | GUM | 23 hr | |
| Sep 10, 4:20 PM CDT | Small Craft Advisory | GUM | 23 hr | |
| Sep 10, 4:41 PM CDT | High Surf Advisory | GUM | 6 days | |
| Sep 13, 3:30 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 14, 6:55 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Sep 14, 6:58 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Sep 14, 7:10 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Sep 20, 2:59 AM CDT | Small Craft Advisory for Winds | GUM | 10 hr | |
| Sep 20, 12:41 PM CDT | Small Craft Advisory | GUM | 44 hr | |
| Sep 20, 5:51 PM CDT | Tropical Storm Watch | GUM | 2 hr | |
| Sep 20, 7:47 PM CDT | Flash Flood Warning | GUM | 6 hr | |
| Sep 20, 8:15 PM CDT | Hurricane Local Statement | GUM | 21 min | |
| Sep 20, 8:36 PM CDT | Tropical Storm Watch | GUM | 9 hr | |
| Sep 21, 4:48 AM CDT | Hurricane Local Statement | GUM | 34 hr | |
| Sep 21, 6:43 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 21, 9:37 AM CDT | Areal Flood Advisory | GUM | 4 hr | |
| Sep 21, 9:56 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 21, 9:56 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 27, 1:20 AM CDT | Rip Current Statement | GUM | 71 hr | |
| Sep 27, 1:20 AM CDT | High Surf Advisory | GUM | 14 hr | |
| Sep 27, 1:20 AM CDT | High Surf Advisory | GUM | 71 hr | |
| Sep 28, 12:22 AM CDT | Tropical Storm Watch | GUM | 7 days | |
| Sep 28, 7:59 AM CDT | Small Craft Advisory | GUM | 31 hr | |
| Sep 28, 5:48 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 30, 12:21 AM CDT | Rip Current Statement | GUM | 3 days | |
| Sep 30, 12:21 AM CDT | High Surf Advisory | GUM | 3 days | |
| Oct 3, 9:57 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Oct 3, 10:59 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Oct 3, 11:17 PM CDT | Flash Flood Warning | GUM | 4 hr | |
| Oct 13, 9:40 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Oct 16, 10:24 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Oct 20, 9:34 PM CDT | Areal Flood Advisory | GUM | 4 hr | |
| Oct 22, 6:01 AM CDT | Tropical Storm Watch | GUM | 25 hr | |
| Oct 22, 6:01 AM CDT | Typhoon Watch | GUM | 16 hr | |
| Oct 22, 9:17 PM CDT | Tropical Storm Warning | GUM | 51 hr | |
| Oct 22, 9:17 PM CDT | Typhoon Warning | GUM | 54 hr | |
| Oct 23, 8:24 AM CDT | Flash Flood Watch | GUM | 37 hr | |
| Oct 24, 7:13 AM CDT | Flash Flood Warning | GUM | 8 hr | |
| Oct 24, 3:12 PM CDT | Flash Flood Warning | GUM | 4 hr | |
| Oct 25, 2:15 AM CDT | Small Craft Advisory | GUM | 47 hr | |
| Oct 25, 2:15 AM CDT | Hazardous Seas Warning | GUM | 10 hr | |
| Oct 25, 2:40 AM CDT | High Surf Warning | GUM | 23 hr | |
| Oct 25, 2:40 AM CDT | High Surf Advisory | GUM | 4 days | |
| Oct 25, 3:41 AM CDT | Hurricane Local Statement | GUM | 19 min | |
| Oct 31, 7:11 PM CDT | High Surf Advisory | GUM | 23 hr | |
| Nov 7, 4:08 PM CST | Special Marine Warning | GUM | 67 min | |
| Nov 19, 10:49 PM CST | Tropical Storm Watch | GUM | 26 hr | |
| Nov 20, 11:31 PM CST | Tropical Storm Warning | GUM | 23 hr | |
| Nov 21, 12:36 PM CST | Small Craft Advisory | GUM | 31 hr | |
| Nov 21, 4:07 PM CST | Areal Flood Advisory | GUM | 2 hr | |
| Nov 21, 7:56 PM CST | Special Marine Warning | GUM | 94 min | |
| Nov 21, 9:19 PM CST | Rip Current Statement | GUM | 26 hr | |
| Nov 21, 9:19 PM CST | High Surf Advisory | GUM | 26 hr | |
| Nov 21, 10:54 PM CST | Hurricane Local Statement | GUM | 6 min | |
| Dec 2, 1:08 AM CST | Small Craft Advisory | GUM | 61 hr | |
| Dec 4, 3:07 PM CST | Small Craft Advisory | GUM | 4 days | |
| Dec 5, 11:00 PM CST | Rip Current Statement | GUM | 21 days | |
| Dec 5, 11:00 PM CST | High Surf Advisory | GUM | 3 days | |
| Dec 14, 12:36 AM CST | High Surf Advisory | GUM | 4 days | |
| Dec 14, 12:53 AM CST | Small Craft Advisory for Hazardous Seas | GUM | 20 hr | |
| Dec 14, 1:50 PM CST | High Surf Advisory | GUM | 3 days | |
| Dec 14, 2:00 PM CST | Small Craft Advisory for Hazardous Seas | GUM | 7 hr | |
| Dec 14, 8:50 PM CST | Small Craft Advisory | GUM | 64 hr | |
| Dec 19, 12:33 AM CST | Small Craft Advisory | GUM | 49 hr | |
| Dec 21, 6:26 PM CST | Beach Hazards Statement | GUM | 3 days | |
| Dec 21, 7:05 PM CST | Small Craft Advisory for Winds | GUM | 41 hr | |
| Dec 23, 11:56 AM CST | Small Craft Advisory | GUM | 60 hr | |
| Dec 25, 1:55 AM CST | Areal Flood Advisory | GUM | 3 hr | |
| Dec 30, 2:26 PM CST | Small Craft Advisory | GUM | 6 days | |
| Dec 30, 5:45 PM CST | Rip Current Statement | GUM | 22 days | |
| Dec 30, 5:45 PM CST | High Surf Advisory | GUM | 6 days |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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. Rebuilt daily.