Weather alerts in Guam, 2020
145 weather alerts in 2020, 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
- 145
- Warnings
- 29
- Watches
- 15
- Advisories
- 74
- Busiest month
- November28 alerts
- Busiest day
- November 23, 20208 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 1, 12:39 AM CST | High Surf Warning | GUM | 12 hr | |
| Jan 1, 12:39 AM CST | High Surf Advisory | GUM | 60 hr | |
| Jan 5, 12:20 PM CST | Small Craft Advisory | GUM | 26 hr | |
| Jan 6, 8:21 PM CST | Small Craft Advisory | GUM | 66 hr | |
| Jan 7, 3:10 PM CST | Rip Current Statement | GUM | 69 hr | |
| Jan 7, 8:25 PM CST | High Surf Advisory | GUM | 28 hr | |
| Jan 14, 12:59 PM CST | Rip Current Statement | GUM | 34 hr | |
| Jan 15, 11:58 AM CST | Rip Current Statement | GUM | 60 hr | |
| Jan 19, 11:20 PM CST | Rip Current Statement | GUM | 9 days | |
| Jan 20, 12:56 AM CST | Small Craft Advisory | GUM | 7 days | |
| Jan 20, 3:04 PM CST | High Surf Advisory | GUM | 57 hr | |
| Feb 1, 1:43 PM CST | Areal Flood Advisory | GUM | 3 hr | |
| Feb 1, 2:31 PM CST | Areal Flood Advisory | GUM | 119 min | |
| Feb 1, 2:47 PM CST | Small Craft Advisory | GUM | 47 hr | |
| Feb 1, 5:23 PM CST | Rip Current Statement | GUM | 45 hr | |
| Feb 1, 5:23 PM CST | High Surf Advisory | GUM | 45 hr | |
| Feb 4, 12:05 PM CST | Rip Current Statement | GUM | 38 hr | |
| Feb 6, 1:38 AM CST | High Surf Advisory | GUM | 46 hr | |
| Feb 6, 12:44 PM CST | Rip Current Statement | GUM | 35 hr | |
| Feb 10, 2:30 AM CST | Small Craft Advisory | GUM | 8 days | |
| Feb 10, 1:06 PM CST | Rip Current Statement | GUM | 17 days | |
| Feb 10, 1:06 PM CST | High Surf Advisory | GUM | 7 days | |
| Feb 11, 5:01 PM CST | Wind Advisory | GUM | 10 hr | |
| Feb 18, 2:38 PM CST | Small Craft Advisory | GUM | 21 hr | |
| Feb 21, 12:32 AM CST | Small Craft Advisory | GUM | 4 days | |
| Feb 29, 2:39 PM CST | Rip Current Statement | GUM | 6 days | |
| Feb 29, 2:39 PM CST | Small Craft Advisory | GUM | 46 hr | |
| Mar 1, 12:38 AM CST | High Surf Advisory | GUM | 12 hr | |
| Mar 18, 2:53 PM CDT | Rip Current Statement | GUM | 55 hr | |
| Mar 18, 6:28 PM CDT | Fire Weather Watch | GUM | 25 hr | |
| Mar 19, 7:16 PM CDT | Fire Weather Watch | GUM | 56 hr | |
| Mar 19, 7:16 PM CDT | Red Flag Warning | GUM | 10 hr | |
| Mar 21, 12:59 PM CDT | Rip Current Statement | GUM | 11 hr | |
| Mar 26, 1:42 AM CDT | Small Craft Advisory | GUM | 47 hr | |
| Mar 26, 9:31 PM CDT | Fire Weather Watch | GUM | 2 hr | |
| Mar 26, 11:38 PM CDT | Fire Weather Watch | GUM | 68 hr | |
| Mar 26, 11:38 PM CDT | Red Flag Warning | GUM | 4 hr | |
| Mar 27, 1:37 AM CDT | Rip Current Statement | GUM | 10 days | |
| Mar 27, 1:37 AM CDT | High Surf Advisory | GUM | 14 hr | |
| Mar 27, 1:37 AM CDT | High Surf Advisory | GUM | 37 hr | |
| Mar 29, 12:40 AM CDT | Small Craft Advisory | GUM | 23 hr | |
| Mar 29, 7:48 PM CDT | Fire Weather Watch | GUM | 20 hr | |
| Mar 29, 7:48 PM CDT | Red Flag Warning | GUM | 8 hr | |
| Apr 3, 2:48 PM CDT | Fire Weather Watch | GUM | 14 hr | |
| Apr 9, 1:23 AM CDT | Rip Current Statement | GUM | 12 hr | |
| Apr 14, 2:46 PM CDT | High Surf Advisory | GUM | 70 hr | |
| Apr 15, 2:27 AM CDT | Small Craft Advisory | GUM | 10 hr | |
| Apr 24, 6:34 PM CDT | Fire Weather Watch | GUM | 91 min | |
| Apr 24, 8:05 PM CDT | Fire Weather Watch | GUM | 26 hr | |
| Apr 24, 8:05 PM CDT | Red Flag Warning | GUM | 8 hr | |
| Apr 25, 10:28 PM CDT | Fire Weather Watch | GUM | 20 hr | |
| Apr 25, 10:28 PM CDT | Red Flag Warning | GUM | 4 hr | |
| Apr 26, 1:11 AM CDT | Small Craft Advisory | GUM | 23 hr | |
| Apr 26, 1:27 AM CDT | Rip Current Statement | GUM | 60 hr | |
| Apr 28, 10:57 PM CDT | Fire Weather Watch | GUM | 20 hr | |
| Apr 29, 2:59 PM CDT | Rip Current Statement | GUM | 3 days | |
| Apr 29, 2:59 PM CDT | Small Craft Advisory | GUM | 24 hr | |
| Apr 29, 6:38 PM CDT | Fire Weather Watch | GUM | 32 hr | |
| Apr 29, 6:38 PM CDT | Red Flag Warning | GUM | 8 hr | |
| May 10, 7:36 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| May 16, 8:37 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| May 30, 4:55 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Jun 30, 9:34 AM CDT | Severe Thunderstorm Warning | GUM | 56 min | |
| Jun 30, 9:39 AM CDT | Special Marine Warning | GUM | 2 hr | |
| Aug 23, 10:43 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Aug 27, 12:08 AM CDT | Areal Flood Advisory | GUM | 4 hr | |
| Aug 27, 12:22 AM CDT | Flash Flood Warning | GUM | 3 hr | |
| Aug 27, 2:45 AM CDT | Flash Flood Warning | GUM | 3 hr | |
| Aug 27, 5:18 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Aug 27, 10:36 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Aug 28, 3:11 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Aug 31, 8:35 PM CDT | Areal Flood Advisory | GUM | 115 min | |
| Aug 31, 9:08 PM CDT | Flash Flood Warning | GUM | 3 hr | |
| Aug 31, 9:08 PM CDT | Flash Flood Warning | GUM | 3 hr | |
| Aug 31, 9:55 PM CDT | Rip Current Statement | GUM | 50 hr | |
| Aug 31, 9:55 PM CDT | High Surf Advisory | GUM | 50 hr | |
| Sep 4, 12:58 PM CDT | Rip Current Statement | GUM | 36 hr | |
| Sep 4, 12:58 PM CDT | High Surf Advisory | GUM | 36 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 | |
| Sep 13, 5:29 AM CDT | Severe Thunderstorm Warning | GUM | 61 min | |
| Sep 13, 11:53 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 15, 5:16 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 16, 1:16 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 16, 2:47 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 16, 5:15 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 20, 6:46 PM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Sep 20, 9:12 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Oct 2, 10:43 PM CDT | Areal Flood Advisory | GUM | 62 min | |
| Oct 2, 11:49 PM CDT | Areal Flood Advisory | GUM | 105 min | |
| Oct 3, 5:20 AM CDT | Areal Flood Advisory | GUM | 97 min | |
| Oct 9, 10:36 PM CDT | Areal Flood Advisory | GUM | 54 min | |
| Oct 10, 7:10 PM CDT | Areal Flood Advisory | GUM | 2 hr | |
| Oct 10, 8:53 PM CDT | Rip Current Statement | GUM | 23 hr | |
| Oct 10, 8:53 PM CDT | High Surf Advisory | GUM | 23 hr | |
| Oct 11, 12:16 AM CDT | Areal Flood Advisory | GUM | 3 hr | |
| Oct 19, 2:41 AM CDT | Rip Current Statement | GUM | 64 hr | |
| Oct 21, 8:58 PM CDT | Areal Flood Advisory | GUM | 68 min | |
| Oct 29, 2:50 PM CDT | Small Craft Advisory | GUM | 22 hr | |
| Oct 29, 3:31 PM CDT | Severe Thunderstorm Warning | GUM | 29 min | |
| Oct 29, 3:50 PM CDT | Special Marine Warning | GUM | 55 min | |
| Oct 29, 6:02 PM CDT | Tropical Storm Watch | GUM | 9 hr | |
| Oct 29, 8:33 PM CDT | Special Marine Warning | GUM | 57 min | |
| Nov 5, 12:14 AM CST | Rip Current Statement | GUM | 62 hr | |
| Nov 5, 1:06 AM CST | Small Craft Advisory | GUM | 43 hr | |
| 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 16, 12:02 PM CST | Rip Current Statement | GUM | 48 hr | |
| Nov 16, 12:02 PM CST | High Surf Advisory | GUM | 48 hr | |
| Nov 20, 1:40 AM CST | Rip Current Statement | GUM | 12 hr | |
| Nov 20, 1:40 AM CST | High Surf Advisory | GUM | 12 hr | |
| Nov 20, 1:24 PM CST | Rip Current Statement | GUM | 13 days | |
| Nov 22, 6:12 PM CST | Flash Flood Warning | GUM | 108 min | |
| Nov 22, 7:56 PM CST | Special Marine Warning | GUM | 64 min | |
| Nov 22, 8:05 PM CST | Areal Flood Advisory | GUM | 115 min | |
| Nov 22, 8:06 PM CST | Severe Thunderstorm Warning | GUM | 39 min | |
| Nov 22, 8:27 PM CST | Flash Flood Warning | GUM | 3 hr | |
| Nov 22, 8:50 PM CST | Severe Thunderstorm Warning | GUM | 55 min | |
| Nov 22, 8:58 PM CST | Special Marine Warning | GUM | 2 hr | |
| Nov 22, 10:16 PM CST | Wind Advisory | GUM | 4 hr | |
| Nov 24, 6:36 AM CST | Special Marine Warning | GUM | 54 min | |
| Nov 24, 7:20 AM CST | Areal Flood Advisory | GUM | 55 min | |
| Nov 24, 10:22 AM CST | Areal Flood Advisory | GUM | 2 hr | |
| Nov 26, 12:12 PM CST | Flood Watch | GUM | 42 hr | |
| Nov 26, 1:03 PM CST | Small Craft Advisory | GUM | 5 days | |
| Nov 27, 12:34 PM CST | High Surf Advisory | GUM | 4 days | |
| Nov 27, 12:35 PM CST | Wind Advisory | GUM | 11 hr | |
| Nov 27, 7:39 PM CST | Areal Flood Advisory | GUM | 4 hr | |
| Nov 27, 9:01 PM CST | Flash Flood Warning | GUM | 3 hr | |
| Nov 27, 10:00 PM CST | Areal Flood Advisory | GUM | 3 hr | |
| Nov 29, 10:31 PM CST | Small Craft Advisory | GUM | 28 hr | |
| Dec 1, 8:46 PM CST | Flash Flood Watch | GUM | 27 hr | |
| Dec 1, 8:46 PM CST | Flash Flood Watch | GUM | 27 hr | |
| Dec 2, 5:51 AM CST | Areal Flood Advisory | GUM | 3 hr | |
| Dec 2, 8:56 AM CST | Areal Flood Advisory | GUM | 5 hr | |
| Dec 2, 4:49 PM CST | Areal Flood Advisory | GUM | 3 hr | |
| Dec 6, 12:03 PM CST | Rip Current Statement | GUM | 4 days | |
| Dec 16, 12:50 PM CST | Rip Current Statement | GUM | 13 days | |
| Dec 17, 12:20 AM CST | Small Craft Advisory | GUM | 8 days | |
| Dec 18, 4:06 PM CST | High Surf Advisory | GUM | 22 hr | |
| Dec 19, 8:59 PM CST | High Surf Advisory | GUM | 17 hr | |
| Dec 22, 4:38 AM CST | High Surf Advisory | GUM | 56 hr | |
| Dec 25, 5:25 PM CST | Beach Hazards Statement | GUM | 51 hr | |
| Dec 26, 12:31 AM CST | Small Craft Advisory | GUM | 49 hr | |
| Dec 29, 7:51 PM CST | Beach Hazards Statement | GUM | 12 days |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 5 |
| Flooding | |
| Flash Flood Warning | 7 |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 33 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 6 |
| Fire Weather Watch | 11 |
| Tropical | |
| Tropical Storm Watch | 1 |
| Coast and beach | |
| High Surf Warning | 1 |
| High Surf Advisory | 19 |
| Beach Hazards Statement | 2 |
| Rip Current Statement | 25 |
| Marine | |
| Special Marine Warning | 10 |
| Small Craft Advisory | 19 |
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. Rebuilt daily.