Alert archive / Maine / Knox County
Weather alerts in Knox County, Maine, 2020
128 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Knox County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 128
- Warnings
- 22
- Watches
- 16
- Advisories
- 61
- Busiest month
- July21 alerts
- Busiest day
- August 25, 20207 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Knox County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 8 | 7 | 13% | 5 | 100% | 14 min |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gray, ME: tornado warnings | 8 | 2 | 75% | 4 | 50% | 4 min |
| NWS Gray, ME: severe thunderstorm warnings | 158 | 112 | 29% | 277 | 87% | 20 min |
| NWS Gray, ME: flash flood warnings | 26 | 9 | 65% | 14 | 93% | 39 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 11, 3:34 AM EST | Winter Weather Advisory | GYX | 33 hr |
| Jan 13, 3:48 PM EST | Winter Weather Advisory | GYX | 6 hr |
| Jan 15, 3:05 AM EST | Winter Weather Advisory | GYX | 38 hr |
| Jan 17, 2:55 PM EST | Winter Storm Watch | GYX | 12 hr |
| Jan 18, 3:16 AM EST | Winter Weather Advisory | GYX | 28 hr |
| Jan 18, 3:11 PM EST | Winter Storm Warning | GYX | 16 hr |
| Feb 5, 3:54 AM EST | Winter Storm Watch | GYX | 11 hr |
| Feb 5, 3:54 AM EST | Winter Weather Advisory | GYX | 66 hr |
| Feb 12, 2:56 AM EST | Winter Weather Advisory | GYX | 33 hr |
| Feb 26, 3:46 AM EST | Wind Advisory | GYX | 32 hr |
| Feb 27, 11:33 AM EST | Coastal Flood Advisory | GYX | 3 hr |
| Mar 3, 2:51 PM EST | Wind Advisory | GYX | 27 hr |
| Mar 7, 4:52 AM EST | Coastal Flood Statement | GYX | 5 hr |
| Mar 13, 3:49 AM EDT | Coastal Flood Advisory | GYX | 13 hr |
| Mar 23, 3:50 AM EDT | Winter Storm Warning | GYX | 24 hr |
| Mar 23, 3:50 AM EDT | Winter Weather Advisory | GYX | 24 hr |
| Apr 3, 3:14 AM EDT | Coastal Flood Statement | GYX | 6 hr |
| Apr 4, 3:26 AM EDT | Coastal Flood Statement | GYX | 7 hr |
| Apr 7, 3:01 PM EDT | Coastal Flood Advisory | GYX | 60 hr |
| Apr 8, 3:34 PM EDT | Wind Advisory | GYX | 32 hr |
| Apr 8, 3:49 PM EDT | Winter Storm Warning | GYX | 46 hr |
| Apr 9, 3:57 AM EDT | Winter Weather Advisory | GYX | 24 hr |
| Apr 12, 3:47 AM EDT | High Wind Watch | GYX | 12 hr |
| Apr 12, 3:19 PM EDT | High Wind Warning | GYX | 31 hr |
| May 7, 3:11 AM EDT | Coastal Flood Advisory | GYX | 24 hr |
| May 8, 3:11 AM EDT | Coastal Flood Statement | GYX | 23 hr |
| May 8, 8:24 PM EDT | Wind Advisory | GYX | 24 hr |
| May 9, 3:00 PM EDT | Freeze Warning | GYX | 15 hr |
| May 12, 10:07 AM EDT | Wind Advisory | GYX | 5 hr |
| May 12, 3:21 PM EDT | Freeze Warning | GYX | 15 hr |
| May 13, 2:54 PM EDT | Freeze Warning | GYX | 16 hr |
| May 21, 3:12 PM EDT | Beach Hazards Statement | GYX | 29 hr |
| May 23, 2:58 PM EDT | Frost Advisory | GYX | 16 hr |
| May 25, 10:15 PM EDT | Dense Fog Advisory | GYX | 10 hr |
| May 27, 11:38 AM EDT | Beach Hazards Statement | GYX | 8 hr |
| May 29, 3:29 PM EDT | Dense Fog Advisory | GYX | 15 hr |
| May 31, 2:59 AM EDT | Beach Hazards Statement | GYX | 17 hr |
| Jun 1, 2:41 PM EDT | Frost Advisory | GYX | 16 hr |
| Jun 6, 10:46 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Jun 6, 12:23 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 6, 2:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jun 12, 3:20 PM EDT | Beach Hazards Statement | GYX | 29 hr |
| Jun 17, 2:50 PM EDT | Beach Hazards Statement | GYX | 30 hr |
| Jun 18, 8:39 PM EDT | Beach Hazards Statement | GYX | 24 hr |
| Jun 19, 8:53 PM EDT | Beach Hazards Statement | GYX | 24 hr |
| Jun 20, 9:40 PM EDT | Beach Hazards Statement | GYX | 23 hr |
| Jun 21, 9:01 PM EDT | Dense Fog Advisory | GYX | 10 hr |
| Jun 24, 7:14 AM EDT | Dense Fog Advisory | GYX | 106 min |
| Jun 27, 3:16 AM EDT | Beach Hazards Statement | GYX | 17 hr |
| Jun 28, 3:59 AM EDT | Dense Fog Advisory | GYX | 4 hr |
| Jul 2, 12:38 AM EDT | Dense Fog Advisory | GYX | 7 hr |
| Jul 2, 6:35 PM EDT | Severe Thunderstorm Warning | GYX | 40 min |
| Jul 3, 8:57 AM EDT | Beach Hazards Statement | GYX | 59 hr |
| Jul 8, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 5:39 PM EDT | Severe Thunderstorm Warning | GYX | 36 min |
| Jul 8, 6:26 PM EDT | Severe Thunderstorm Warning | GYX | 49 min |
| Jul 8, 6:30 PM EDT | Areal Flood Advisory | GYX | 2 hr |
| Jul 9, 2:18 AM EDT | Dense Fog Advisory | GYX | 7 hr |
| Jul 9, 7:02 PM EDT | Dense Fog Advisory | GYX | 15 hr |
| Jul 10, 3:20 PM EDT | Dense Fog Advisory | GYX | 18 hr |
| Jul 11, 7:02 PM EDT | Dense Fog Advisory | GYX | 14 hr |
| Jul 14, 2:19 PM EDT | Flash Flood Warning | GYX | 3 hr |
| Jul 14, 5:27 PM EDT | Areal Flood Advisory | GYX | 2 hr |
| Jul 14, 7:15 PM EDT | Flash Flood Warning | GYX | 104 min |
| Jul 18, 3:27 AM EDT | Dense Fog Advisory | GYX | 4 hr |
| Jul 18, 7:02 AM EDT | Dense Fog Advisory | GYX | 58 min |
| Jul 18, 10:30 AM EDT | Heat Advisory | GYX | 57 hr |
| Jul 23, 12:58 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 23, 6:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 25, 2:20 PM EDT | Beach Hazards Statement | GYX | 30 hr |
| Jul 31, 3:41 AM EDT | Beach Hazards Statement | GYX | 16 hr |
| Aug 3, 5:41 AM EDT | Tropical Storm Watch | GYX | 35 hr |
| Aug 3, 5:33 PM EDT | Tropical Storm Warning | GYX | 33 hr |
| Aug 4, 3:19 AM EDT | Coastal Flood Advisory | GYX | 23 hr |
| Aug 4, 5:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 3:19 AM EDT | Dense Fog Advisory | GYX | 6 hr |
| Aug 23, 4:07 AM EDT | Dense Fog Advisory | GYX | 3 hr |
| Aug 24, 3:50 PM EDT | Severe Thunderstorm Warning | GYX | 40 min |
| Aug 24, 11:38 PM EDT | Dense Fog Advisory | GYX | 8 hr |
| Aug 25, 2:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 25, 3:12 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 25, 3:40 PM EDT | Severe Thunderstorm Warning | GYX | 50 min |
| Aug 25, 4:05 PM EDT | Severe Thunderstorm Warning | GYX | 40 min |
| Aug 25, 4:14 PM EDT | Severe Thunderstorm Warning | GYX | 31 min |
| Aug 25, 4:27 PM EDT | Severe Thunderstorm Warning | GYX | 36 min |
| Sep 9, 7:05 AM EDT | Dense Fog Advisory | GYX | 3 hr |
| Sep 9, 2:37 PM EDT | Dense Fog Advisory | GYX | 19 hr |
| Sep 14, 3:33 AM EDT | High Surf Advisory | GYX | 43 hr |
| Sep 19, 3:02 PM EDT | Frost Advisory | GYX | 16 hr |
| Sep 20, 3:13 PM EDT | High Surf Advisory | GYX | 27 hr |
| Sep 20, 3:17 PM EDT | Freeze Warning | GYX | 18 hr |
| Sep 21, 3:18 PM EDT | Frost Advisory | GYX | 14 hr |
| Sep 21, 3:38 PM EDT | Coastal Flood Watch | GYX | 13 hr |
| Sep 22, 4:13 AM EDT | Coastal Flood Advisory | GYX | 25 hr |
| Sep 23, 5:42 AM EDT | Coastal Flood Advisory | GYX | 9 hr |
| Sep 26, 4:40 AM EDT | Dense Fog Advisory | GYX | 4 hr |
| Sep 28, 3:13 PM EDT | Dense Fog Advisory | GYX | 19 hr |
| Sep 29, 3:04 PM EDT | Wind Advisory | GYX | 23 hr |
| Oct 8, 3:24 PM EDT | Frost Advisory | GYX | 16 hr |
| Oct 22, 12:28 AM EDT | Dense Fog Advisory | GYX | 8 hr |
| Nov 8, 9:44 PM EST | Dense Fog Advisory | GYX | 12 hr |
| Nov 14, 3:34 PM EST | High Wind Watch | GYX | 19 hr |
| Nov 14, 3:34 PM EST | Wind Advisory | GYX | 35 hr |
| Nov 16, 1:20 AM EST | Special Weather Statement | GYX | 55 min |
| Nov 16, 2:56 AM EST | Coastal Flood Statement | GYX | 10 hr |
| Nov 23, 10:56 AM EST | Areal Flood Advisory | GYX | 3 hr |
| Nov 29, 2:33 PM EST | High Wind Watch | GYX | 12 hr |
| Nov 30, 2:33 AM EST | Wind Advisory | GYX | 28 hr |
| Nov 30, 10:23 AM EST | High Wind Warning | GYX | 21 hr |
| Nov 30, 2:32 PM EST | Flood Watch | GYX | 24 hr |
| Nov 30, 2:43 PM EST | Coastal Flood Statement | GYX | 4 hr |
| Nov 30, 6:52 PM EST | Coastal Flood Advisory | GYX | 7 hr |
| Dec 1, 3:17 AM EST | Coastal Flood Advisory | GYX | 11 hr |
| Dec 3, 3:57 PM EST | Winter Storm Watch | GYX | 36 hr |
| Dec 5, 4:15 AM EST | Winter Weather Advisory | GYX | 26 hr |
| Dec 13, 12:57 PM EST | Dense Fog Advisory | GYX | 3 hr |
| Dec 13, 4:05 PM EST | Coastal Flood Statement | GYX | 19 hr |
| Dec 16, 3:28 AM EST | Winter Storm Watch | GYX | 14 hr |
| Dec 16, 3:28 AM EST | Winter Storm Warning | GYX | 39 hr |
| Dec 16, 3:28 AM EST | Winter Weather Advisory | GYX | 30 hr |
| Dec 17, 8:30 AM EST | Coastal Flood Statement | GYX | 7 hr |
| Dec 17, 11:44 AM EST | Special Weather Statement | GYX | 91 min |
| Dec 17, 2:01 PM EST | Special Weather Statement | GYX | 59 min |
| Dec 17, 3:13 PM EST | Special Weather Statement | GYX | 62 min |
| Dec 20, 11:51 PM EST | Dense Fog Advisory | GYX | 9 hr |
| Dec 22, 3:37 PM EST | High Wind Watch | GYX | 48 hr |
| Dec 23, 1:50 PM EST | Flood Watch | GYX | 60 hr |
| Dec 24, 9:33 AM EST | High Wind Warning | GYX | 30 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 | |
| Severe Thunderstorm Warning | 8 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 4 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flood Watch | 2 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 10 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 4 |
| Frost Advisory | 5 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 4 |
| Wind Advisory | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 23 |
| Tropical | |
| Tropical Storm Warning | 1 |
| Tropical Storm Watch | 1 |
| Coast and beach | |
| Coastal Flood Watch | 1 |
| Coastal Flood Advisory | 9 |
| High Surf Advisory | 2 |
| Beach Hazards Statement | 12 |
| Coastal Flood Statement | 8 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe 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.