Weather alerts in Guam, 2021
178 weather alerts in 2021, 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
- 178
- Warnings
- 27
- Watches
- 25
- Advisories
- 98
- Busiest month
- August29 alerts
- Busiest day
- September 23, 202112 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 |
|---|---|---|---|---|
| Dec 31, 11:08 PM CST | Rip Current Statement | GUM | 50 hr | |
| Jan 2, 9:03 PM CST | Wind Advisory | GUM | 6 hr | |
| Jan 3, 7:44 PM CST | Wind Advisory | GUM | 7 hr | |
| Jan 4, 5:28 PM CST | Wind Advisory | GUM | 10 hr | |
| Jan 11, 2:02 PM CST | Rip Current Statement | GUM | 12 days | |
| Jan 20, 1:18 AM CST | Small Craft Advisory | GUM | 311 days | |
| Jan 20, 9:12 PM CST | Areal Flood Advisory | GUM | 3 hr | |
| Jan 26, 11:23 AM CST | Rip Current Statement | GUM | 3 days | |
| Jan 26, 11:23 AM CST | High Surf Advisory | GUM | 3 days | |
| Jan 27, 12:25 PM CST | Small Craft Advisory | GUM | 303 days | |
| Jan 30, 1:47 AM CST | Small Craft Advisory | GUM | 300 days | |
| Jan 30, 12:00 PM CST | Rip Current Statement | GUM | 9 days | |
| Jan 30, 12:00 PM CST | High Surf Advisory | GUM | 5 days | |
| Feb 2, 10:34 PM CST | Wind Advisory | GUM | 4 hr | |
| Feb 19, 1:41 PM CST | High Surf Advisory | GUM | 35 hr | |
| Feb 24, 9:41 PM CST | Fire Weather Watch | GUM | 19 hr | |
| Feb 24, 9:41 PM CST | Red Flag Warning | GUM | 5 hr | |
| Feb 25, 4:28 PM CST | Fire Weather Watch | GUM | 22 hr | |
| Feb 25, 4:28 PM CST | Red Flag Warning | GUM | 11 hr | |
| Feb 27, 12:15 AM CST | Fire Weather Watch | GUM | 17 hr | |
| Feb 27, 5:44 PM CST | Fire Weather Watch | GUM | 22 hr | |
| Feb 27, 5:44 PM CST | Red Flag Warning | GUM | 9 hr | |
| Feb 28, 2:44 PM CST | Rip Current Statement | GUM | 47 hr | |
| Feb 28, 2:44 PM CST | High Surf Advisory | GUM | 47 hr | |
| Feb 28, 3:23 PM CST | Red Flag Warning | GUM | 11 hr | |
| Mar 1, 1:33 AM CST | Small Craft Advisory | GUM | 36 hr | |
| Mar 5, 5:00 AM CST | Rip Current Statement | GUM | 30 hr | |
| Mar 5, 5:00 AM CST | High Surf Advisory | GUM | 30 hr | |
| Mar 6, 4:58 PM CST | Fire Weather Watch | GUM | 5 hr | |
| Mar 6, 9:32 PM CST | Fire Weather Watch | GUM | 24 hr | |
| Mar 6, 9:32 PM CST | Red Flag Warning | GUM | 5 hr | |
| Mar 7, 9:02 PM CST | Red Flag Warning | GUM | 6 hr | |
| Mar 22, 7:52 PM CDT | Fire Weather Watch | GUM | 24 hr | |
| Mar 23, 7:58 PM CDT | Fire Weather Watch | GUM | 24 hr | |
| Mar 23, 7:58 PM CDT | Red Flag Warning | GUM | 7 hr | |
| Mar 24, 3:33 PM CDT | Rip Current Statement | GUM | 33 hr | |
| Mar 24, 8:11 PM CDT | Fire Weather Watch | GUM | 26 hr | |
| Mar 24, 8:11 PM CDT | Red Flag Warning | GUM | 7 hr | |
| Mar 25, 9:41 PM CDT | Red Flag Warning | GUM | 5 hr | |
| Apr 5, 3:59 AM CDT | High Surf Advisory | GUM | 23 hr | |
| Apr 8, 8:30 PM CDT | Fire Weather Watch | GUM | 23 hr | |
| Apr 9, 7:08 PM CDT | Fire Weather Watch | GUM | 56 hr | |
| Apr 9, 7:08 PM CDT | Red Flag Warning | GUM | 8 hr | |
| Apr 16, 7:36 PM CDT | High Surf Advisory | GUM | 6 days | |
| Apr 18, 4:28 PM CDT | Small Craft Advisory | GUM | 47 hr | |
| Apr 24, 2:09 AM CDT | High Surf Advisory | GUM | 4 days | |
| Apr 24, 8:45 PM CDT | Red Flag Warning | GUM | 6 hr | |
| Apr 25, 2:28 AM CDT | Small Craft Advisory | GUM | 37 hr | |
| Apr 28, 2:59 AM CDT | High Surf Advisory | GUM | 60 hr | |
| May 3, 1:06 AM CDT | Fire Weather Watch | GUM | 21 hr | |
| May 3, 10:18 PM CDT | Red Flag Warning | GUM | 5 hr | |
| May 3, 10:35 PM CDT | Fire Weather Watch | GUM | 71 hr | |
| May 4, 6:05 PM CDT | Rip Current Statement | GUM | 69 hr | |
| May 5, 12:31 AM CDT | Small Craft Advisory | GUM | 3 days | |
| May 7, 9:18 PM CDT | Rip Current Statement | GUM | 3 hr | |
| May 21, 2:59 AM CDT | Small Craft Advisory | GUM | 12 hr | |
| May 29, 4:56 PM CDT | Rip Current Statement | GUM | 34 hr | |
| May 31, 12:23 PM CDT | Rip Current Statement | GUM | 9 hr | |
| Jun 21, 12:19 AM CDT | Tropical Storm Watch | GUM | 22 hr | |
| Jun 21, 12:19 AM CDT | Tropical Storm Warning | GUM | 22 hr | |
| Jun 21, 12:55 AM CDT | High Surf Advisory | GUM | 25 hr | |
| Jun 21, 1:10 AM CDT | Small Craft Advisory | GUM | 24 hr | |
| Jun 21, 4:01 AM CDT | Flash Flood Watch | GUM | 20 hr | |
| Jun 21, 10:10 PM CDT | Rip Current Statement | GUM | 3 hr | |
| Jul 14, 5:13 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Jul 14, 8:00 AM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Jul 19, 7:49 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Jul 19, 9:54 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Jul 19, 11:10 PM CDT | Flash Flood Watch | GUM | 48 hr | |
| Jul 20, 5:50 PM CDT | Flash Flood Warning | GUM | 3 hr | |
| Jul 20, 8:46 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Jul 20, 10:09 PM CDT | Special Marine Warning | GUM | 96 min | |
| Jul 21, 11:05 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Jul 21, 11:23 PM CDT | Flash Flood Watch | GUM | 16 hr | |
| Jul 21, 11:23 PM CDT | Flash Flood Warning | GUM | 3 hr | |
| Jul 22, 12:22 AM CDT | Areal Flood Advisory | GUM | 113 min | |
| Jul 22, 2:42 AM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Jul 22, 2:20 PM CDT | High Surf Advisory | GUM | 5 days | |
| Jul 23, 2:35 PM CDT | Small Craft Advisory | GUM | 49 hr | |
| Jul 24, 6:13 PM CDT | Areal Flood Advisory | GUM | 107 min | |
| Jul 30, 9:11 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Jul 30, 10:15 PM CDT | Flash Flood Warning | GUM | 66 min | |
| Aug 1, 9:37 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Aug 1, 2:09 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Aug 1, 5:17 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Aug 1, 8:27 PM CDT | Areal Flood Advisory | GUM | 5 hr | |
| Aug 2, 1:31 AM CDT | Rip Current Statement | GUM | 42 hr | |
| Aug 2, 1:31 AM CDT | High Surf Advisory | GUM | 42 hr | |
| Aug 3, 6:31 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Aug 11, 8:43 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Aug 14, 6:58 PM CDT | Tropical Storm Watch | GUM | 34 hr | |
| Aug 16, 1:53 AM CDT | Flash Flood Watch | GUM | 24 hr | |
| Aug 16, 1:59 AM CDT | Small Craft Advisory | GUM | 14 hr | |
| Aug 16, 2:28 AM CDT | Rip Current Statement | GUM | 13 hr | |
| Aug 16, 2:28 AM CDT | High Surf Advisory | GUM | 13 hr | |
| Aug 16, 5:03 AM CDT | Hurricane Local Statement | GUM | 117 min | |
| Aug 16, 5:41 AM CDT | Rip Current Statement | GUM | 10 hr | |
| Aug 16, 5:41 AM CDT | Rip Current Statement | GUM | 10 hr | |
| Aug 16, 11:29 AM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Aug 16, 11:30 AM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Aug 16, 8:17 PM CDT | Small Craft Advisory | GUM | 13 hr | |
| Aug 17, 10:48 PM CDT | Areal Flood Advisory | GUM | 4 hr | |
| Aug 18, 12:21 AM CDT | Flash Flood Warning | GUM | 91 min | |
| Aug 21, 12:20 AM CDT | Special Marine Warning | GUM | 25 min | |
| Aug 21, 11:10 PM CDT | Areal Flood Advisory | GUM | 65 min | |
| Aug 22, 8:27 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Aug 23, 7:47 PM CDT | Areal Flood Advisory | GUM | 118 min | |
| Aug 23, 8:29 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Aug 23, 9:13 PM CDT | Areal Flood Advisory | GUM | 92 min | |
| Aug 23, 9:40 PM CDT | Flash Flood Warning | GUM | 110 min | |
| Aug 26, 2:48 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 4, 1:07 AM CDT | Small Craft Advisory | GUM | 24 hr | |
| Sep 22, 2:20 AM CDT | Flood Watch | GUM | 38 hr | |
| Sep 22, 2:46 AM CDT | Small Craft Advisory | GUM | 17 hr | |
| Sep 22, 2:55 AM CDT | Flood Watch | GUM | 60 hr | |
| Sep 22, 5:16 AM CDT | Rip Current Statement | GUM | 42 hr | |
| Sep 22, 6:04 PM CDT | Tropical Storm Watch | GUM | 3 hr | |
| Sep 22, 8:46 PM CDT | Tropical Storm Warning | GUM | 21 hr | |
| Sep 22, 10:30 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 22, 10:30 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 23, 12:36 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 23, 1:12 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 23, 1:12 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 23, 4:16 AM CDT | Areal Flood Advisory | GUM | 5 hr | |
| Sep 23, 4:16 AM CDT | Areal Flood Advisory | GUM | 5 hr | |
| Sep 23, 4:49 AM CDT | Areal Flood Advisory | GUM | 4 hr | |
| Sep 23, 5:18 PM CDT | Small Craft Advisory | GUM | 6 hr | |
| Sep 23, 5:26 PM CDT | High Surf Advisory | GUM | 6 hr | |
| Sep 23, 6:14 PM CDT | Flash Flood Warning | GUM | 2 hr | |
| Sep 23, 8:28 PM CDT | Flash Flood Warning | GUM | 2 hr | |
| Sep 24, 11:43 AM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Sep 28, 1:30 AM CDT | Rip Current Statement | GUM | 6 days | |
| Sep 28, 1:30 AM CDT | High Surf Advisory | GUM | 6 days | |
| Oct 2, 11:30 AM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Oct 3, 9:34 PM CDT | Special Marine Warning | GUM | 116 min | |
| Oct 4, 1:31 PM CDT | Areal Flood Advisory | GUM | 5 hr | |
| Oct 5, 7:34 AM CDT | Flash Flood Warning | GUM | 3 hr | |
| Oct 6, 1:12 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Oct 6, 1:46 AM CDT | Flash Flood Warning | GUM | 3 hr | |
| Oct 6, 6:54 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Oct 6, 8:38 PM CDT | Flash Flood Warning | GUM | 74 min | |
| Oct 7, 1:38 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Oct 9, 8:54 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Oct 9, 10:23 PM CDT | Flash Flood Watch | GUM | 32 hr | |
| Oct 10, 1:53 AM CDT | Rip Current Statement | GUM | 37 hr | |
| Oct 10, 1:53 AM CDT | High Surf Advisory | GUM | 37 hr | |
| Oct 12, 12:16 AM CDT | Rip Current Statement | GUM | 25 hr | |
| Oct 12, 12:16 AM CDT | High Surf Advisory | GUM | 25 hr | |
| Oct 16, 8:46 PM CDT | Areal Flood Advisory | GUM | 119 min | |
| Oct 21, 2:31 AM CDT | Areal Flood Advisory | GUM | 119 min | |
| Oct 21, 5:58 PM CDT | Flash Flood Watch | GUM | 45 hr | |
| Oct 21, 5:58 PM CDT | Flash Flood Watch | GUM | 57 hr | |
| Oct 21, 9:37 PM CDT | Areal Flood Advisory | GUM | 53 min | |
| Oct 23, 2:12 AM CDT | Small Craft Advisory | GUM | 37 hr | |
| Oct 23, 4:31 AM CDT | Areal Flood Advisory | GUM | 119 min | |
| Oct 23, 6:48 PM CDT | Areal Flood Advisory | GUM | 57 min | |
| Oct 24, 12:37 AM CDT | Special Weather Statement | GUM | 53 min | |
| Oct 30, 10:53 PM CDT | High Surf Advisory | GUM | 40 hr | |
| Nov 12, 12:26 AM CST | Rip Current Statement | GUM | 61 hr | |
| Nov 12, 11:56 PM CST | Small Craft Advisory | GUM | 26 hr | |
| Nov 15, 2:36 PM CST | Rip Current Statement | GUM | 32 hr | |
| Nov 15, 4:14 PM CST | Small Craft Advisory | GUM | 7 hr | |
| Nov 24, 1:47 PM CST | Small Craft Advisory | GUM | 5 days | |
| Nov 26, 12:07 AM CST | Rip Current Statement | GUM | 6 days | |
| Nov 27, 1:45 AM CST | High Surf Advisory | GUM | 70 hr | |
| Nov 28, 3:30 PM CST | Areal Flood Advisory | GUM | 3 hr | |
| Dec 2, 1:02 AM CST | Rip Current Statement | GUM | 16 days | |
| Dec 2, 2:41 PM CST | High Surf Advisory | GUM | 5 days | |
| Dec 4, 1:07 AM CST | Small Craft Advisory | GUM | 3 days | |
| Dec 10, 12:11 AM CST | Small Craft Advisory | GUM | 5 days | |
| Dec 10, 6:12 PM CST | High Surf Advisory | GUM | 53 hr | |
| Dec 15, 1:12 PM CST | Small Craft Advisory | GUM | 37 hr | |
| Dec 23, 12:41 AM CST | Rip Current Statement | GUM | 4 days | |
| Dec 23, 12:41 AM CST | High Surf Advisory | GUM | 35 hr | |
| Dec 23, 6:19 AM CST | Small Craft Advisory | GUM | 38 hr | |
| Dec 27, 2:04 PM CST | Rip Current Statement | GUM | 45 hr | |
| Dec 27, 2:04 PM CST | Small Craft Advisory | GUM | 48 hr | |
| Dec 27, 7:48 PM CST | High Surf Advisory | GUM | 39 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Special Weather Statement | 1 |
| Flooding | |
| Flash Flood Warning | 10 |
| Flash Flood Watch | 7 |
| Flood Watch | 2 |
| Areal Flood Advisory | 47 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 12 |
| Fire Weather Watch | 13 |
| Tropical | |
| Tropical Storm Warning | 2 |
| Tropical Storm Watch | 3 |
| Hurricane Local Statement | 1 |
| Coast and beach | |
| High Surf Advisory | 23 |
| Rip Current Statement | 26 |
| Marine | |
| Special Marine Warning | 3 |
| Small Craft Advisory | 24 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.