Alert archive / Maine / Somerset County
Weather alerts in Somerset County, Maine, 2020
191 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Somerset County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 191
- Warnings
- 52
- Watches
- 26
- Advisories
- 79
- Busiest month
- July34 alerts
- Busiest day
- July 8, 202012 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Somerset County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 20 | 12 | 40% | 13 | 69% | 20 min |
| Flash flood warnings | 1 | 0 | 100% | 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 |
| NWS Caribou, ME: tornado warnings | 1 | 0 | 100% | 0 | ||
| NWS Caribou, ME: severe thunderstorm warnings | 36 | 16 | 56% | 27 | 81% | 27 min |
| NWS Caribou, ME: flash flood warnings | 0 | 1 | 0% |
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 10, 3:17 AM EST | Winter Storm Watch | GYX | 24 hr |
| Jan 10, 4:48 AM EST | Winter Storm Watch | CAR | 23 hr |
| Jan 10, 3:16 PM EST | Winter Storm Warning | CAR | 49 hr |
| Jan 11, 3:34 AM EST | Winter Storm Warning | GYX | 35 hr |
| Jan 15, 3:05 AM EST | Winter Weather Advisory | GYX | 38 hr |
| Jan 16, 3:17 PM EST | Wind Chill Advisory | CAR | 37 hr |
| Jan 16, 3:21 PM EST | Wind Chill Advisory | GYX | 18 hr |
| Jan 17, 2:55 PM EST | Wind Chill Advisory | GYX | 16 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, 3:20 AM EST | Winter Weather Advisory | CAR | 45 hr |
| Jan 18, 3:11 PM EST | Winter Storm Warning | GYX | 16 hr |
| Jan 25, 2:32 AM EST | Winter Weather Advisory | CAR | 51 hr |
| Jan 25, 3:52 AM EST | Winter Weather Advisory | GYX | 23 hr |
| Feb 5, 3:54 AM EST | Winter Storm Watch | GYX | 11 hr |
| Feb 5, 4:14 AM EST | Winter Storm Watch | CAR | 12 hr |
| Feb 5, 3:22 PM EST | Winter Storm Warning | GYX | 54 hr |
| Feb 5, 3:47 PM EST | Winter Storm Warning | CAR | 59 hr |
| Feb 7, 3:03 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 13, 3:03 AM EST | Wind Chill Advisory | CAR | 33 hr |
| Feb 13, 3:12 PM EST | Wind Chill Advisory | GYX | 18 hr |
| Feb 17, 3:01 PM EST | Winter Weather Advisory | GYX | 33 hr |
| Feb 17, 3:04 PM EST | Winter Weather Advisory | CAR | 36 hr |
| Feb 19, 2:06 PM EST | Wind Chill Advisory | GYX | 18 hr |
| Feb 19, 2:52 PM EST | Wind Chill Advisory | CAR | 19 hr |
| Feb 25, 3:16 AM EST | Winter Storm Watch | GYX | 25 hr |
| Feb 25, 4:20 AM EST | Winter Storm Watch | CAR | 24 hr |
| Feb 26, 3:53 AM EST | Winter Storm Warning | GYX | 39 hr |
| Feb 26, 4:31 AM EST | Winter Storm Warning | CAR | 48 hr |
| Feb 27, 6:18 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Mar 3, 3:49 AM EST | Winter Weather Advisory | CAR | 24 hr |
| Mar 3, 2:45 PM EST | Wind Advisory | CAR | 27 hr |
| Mar 3, 2:51 PM EST | Wind Advisory | GYX | 27 hr |
| Mar 9, 3:16 AM EDT | Winter Weather Advisory | CAR | 43 hr |
| Mar 12, 3:39 PM EDT | Winter Weather Advisory | CAR | 28 hr |
| Mar 14, 3:18 AM EDT | Wind Advisory | CAR | 15 hr |
| Mar 14, 3:23 AM EDT | Wind Advisory | GYX | 15 hr |
| Mar 23, 3:50 AM EDT | Winter Weather Advisory | GYX | 24 hr |
| Mar 23, 9:33 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 28, 3:15 AM EDT | Winter Storm Watch | GYX | 24 hr |
| Mar 28, 3:09 PM EDT | Winter Storm Watch | CAR | 12 hr |
| Mar 29, 3:16 AM EDT | Winter Weather Advisory | GYX | 24 hr |
| Mar 29, 3:31 AM EDT | Winter Storm Warning | CAR | 36 hr |
| Apr 3, 2:27 PM EDT | River Flood Warning | GYX | 25 hr |
| Apr 7, 3:19 AM EDT | Winter Storm Watch | CAR | 36 hr |
| Apr 7, 3:19 AM EDT | Winter Storm Watch | GYX | 37 hr |
| Apr 8, 3:44 PM EDT | Winter Storm Warning | CAR | 49 hr |
| Apr 8, 3:49 PM EDT | Winter Storm Warning | GYX | 46 hr |
| Apr 8, 3:49 PM EDT | Winter Weather Advisory | GYX | 12 hr |
| Apr 12, 2:47 PM EDT | Wind Advisory | CAR | 33 hr |
| Apr 12, 2:52 PM EDT | Flood Watch | CAR | 69 hr |
| Apr 12, 3:19 PM EDT | Wind Advisory | GYX | 31 hr |
| Apr 12, 3:32 PM EDT | Flood Watch | GYX | 40 hr |
| Apr 13, 12:12 PM EDT | River Flood Warning | GYX | 39 hr |
| Apr 25, 3:16 PM EDT | Winter Storm Watch | GYX | 12 hr |
| Apr 26, 3:41 AM EDT | Winter Weather Advisory | GYX | 36 hr |
| May 8, 3:08 AM EDT | Winter Weather Advisory | GYX | 42 hr |
| May 8, 4:26 AM EDT | Winter Weather Advisory | CAR | 42 hr |
| May 8, 8:24 PM EDT | Wind Advisory | GYX | 24 hr |
| May 11, 4:02 AM EDT | Winter Weather Advisory | CAR | 29 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 23, 2:58 PM EDT | Frost Advisory | GYX | 16 hr |
| May 25, 10:15 PM EDT | Dense Fog Advisory | GYX | 10 hr |
| May 27, 2:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| May 29, 7:23 PM EDT | Severe Thunderstorm Warning | GYX | 52 min |
| May 29, 7:53 PM EDT | Severe Thunderstorm Warning | GYX | 52 min |
| May 29, 8:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 31, 2:56 PM EDT | Frost Advisory | GYX | 15 hr |
| May 31, 3:26 PM EDT | Freeze Warning | CAR | 15 hr |
| May 31, 8:53 PM EDT | Freeze Warning | GYX | 9 hr |
| Jun 1, 2:41 PM EDT | Frost Advisory | GYX | 16 hr |
| Jun 1, 3:03 PM EDT | Frost Advisory | CAR | 16 hr |
| Jun 1, 3:03 PM EDT | Freeze Warning | CAR | 16 hr |
| Jun 20, 4:36 PM EDT | Special Weather Statement | GYX | 24 min |
| Jun 20, 4:57 PM EDT | Severe Thunderstorm Warning | GYX | 48 min |
| Jun 20, 5:02 PM EDT | Special Weather Statement | GYX | 28 min |
| Jun 20, 5:30 PM EDT | Areal Flood Advisory | GYX | 39 min |
| Jun 21, 2:56 PM EDT | Special Weather Statement | GYX | 34 min |
| Jun 21, 3:09 PM EDT | Areal Flood Advisory | CAR | 5 hr |
| Jun 21, 3:29 PM EDT | Severe Thunderstorm Warning | GYX | 33 min |
| Jun 22, 2:12 PM EDT | Special Weather Statement | GYX | 33 min |
| Jun 22, 2:22 PM EDT | Severe Thunderstorm Warning | CAR | 22 min |
| Jun 22, 4:49 PM EDT | Special Weather Statement | GYX | 26 min |
| Jun 23, 2:24 PM EDT | Special Weather Statement | GYX | 36 min |
| Jul 1, 6:18 AM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jul 2, 2:41 PM EDT | Mesoscale Discussion | SPC | 109 min |
| Jul 2, 3:58 PM EDT | Severe Thunderstorm Warning | GYX | 47 min |
| Jul 2, 4:26 PM EDT | Special Weather Statement | GYX | 34 min |
| Jul 2, 4:34 PM EDT | Severe Thunderstorm Warning | GYX | 41 min |
| Jul 2, 5:50 PM EDT | Severe Thunderstorm Warning | GYX | 40 min |
| Jul 5, 2:21 PM EDT | Special Weather Statement | CAR | 24 min |
| Jul 5, 3:57 PM EDT | Special Weather Statement | GYX | 33 min |
| Jul 8, 1:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 8, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 3:08 PM EDT | Special Weather Statement | GYX | 67 min |
| Jul 8, 3:26 PM EDT | Severe Thunderstorm Warning | GYX | 49 min |
| Jul 8, 3:39 PM EDT | Severe Thunderstorm Warning | CAR | 37 min |
| Jul 8, 3:47 PM EDT | Special Weather Statement | CAR | 43 min |
| Jul 8, 3:54 PM EDT | Severe Thunderstorm Warning | GYX | 51 min |
| Jul 8, 4:10 PM EDT | Severe Thunderstorm Warning | GYX | 50 min |
| Jul 8, 4:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 8, 4:54 PM EDT | Severe Thunderstorm Warning | GYX | 51 min |
| Jul 8, 5:22 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jul 8, 5:39 PM EDT | Severe Thunderstorm Warning | GYX | 36 min |
| Jul 9, 2:18 AM EDT | Dense Fog Advisory | GYX | 7 hr |
| Jul 13, 1:56 PM EDT | Special Weather Statement | GYX | 49 min |
| Jul 13, 2:20 PM EDT | Special Weather Statement | CAR | 55 min |
| Jul 13, 4:42 PM EDT | Flash Flood Warning | GYX | 110 min |
| Jul 14, 5:27 PM EDT | Areal Flood Advisory | GYX | 2 hr |
| 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, 6:05 PM EDT | Special Weather Statement | GYX | 25 min |
| Jul 27, 4:47 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 27, 5:15 PM EDT | Severe Thunderstorm Warning | GYX | 45 min |
| Jul 27, 6:46 PM EDT | Severe Thunderstorm Warning | GYX | 29 min |
| Jul 30, 4:25 PM EDT | Special Weather Statement | GYX | 35 min |
| Jul 30, 4:37 PM EDT | Special Weather Statement | GYX | 38 min |
| Aug 3, 5:41 AM EDT | Tropical Storm Watch | GYX | 35 hr |
| Aug 3, 11:13 AM EDT | Tropical Storm Watch | CAR | 30 hr |
| Aug 3, 1:57 PM EDT | Flash Flood Watch | GYX | 32 hr |
| Aug 5, 12:15 AM EDT | Wind Advisory | CAR | 4 hr |
| Aug 10, 3:27 PM EDT | Heat Advisory | GYX | 29 hr |
| Aug 11, 6:41 PM EDT | Special Weather Statement | GYX | 34 min |
| Aug 24, 1:27 PM EDT | Severe Thunderstorm Warning | GYX | 48 min |
| Aug 24, 1:45 PM EDT | Severe Thunderstorm Warning | GYX | 45 min |
| Aug 24, 2:16 PM EDT | Severe Thunderstorm Warning | GYX | 44 min |
| Aug 24, 11:38 PM EDT | Dense Fog Advisory | GYX | 8 hr |
| Aug 25, 8:32 AM EDT | Special Weather Statement | GYX | 28 min |
| Aug 25, 2:34 PM EDT | Severe Thunderstorm Warning | GYX | 41 min |
| Aug 25, 2:57 PM EDT | Wind Advisory | CAR | 29 hr |
| Sep 9, 2:37 PM EDT | Dense Fog Advisory | GYX | 19 hr |
| Sep 11, 3:05 AM EDT | Frost Advisory | CAR | 29 hr |
| Sep 11, 1:16 PM EDT | Frost Advisory | GYX | 19 hr |
| Sep 12, 3:00 PM EDT | Frost Advisory | GYX | 8 hr |
| Sep 13, 2:48 PM EDT | Freeze Watch | GYX | 25 hr |
| Sep 14, 2:50 AM EDT | Frost Advisory | CAR | 28 hr |
| Sep 14, 3:25 AM EDT | Frost Advisory | GYX | 30 hr |
| Sep 14, 3:25 AM EDT | Freeze Warning | GYX | 30 hr |
| Sep 14, 3:36 PM EDT | Freeze Warning | CAR | 15 hr |
| Sep 16, 3:19 PM EDT | Freeze Watch | GYX | 23 hr |
| Sep 16, 3:57 PM EDT | Freeze Watch | CAR | 11 hr |
| Sep 17, 2:47 AM EDT | Freeze Warning | CAR | 30 hr |
| Sep 17, 2:46 PM EDT | Freeze Warning | GYX | 16 hr |
| Sep 18, 2:44 PM EDT | Frost Advisory | GYX | 16 hr |
| Sep 18, 3:57 PM EDT | Freeze Warning | CAR | 16 hr |
| Sep 19, 2:03 PM EDT | Freeze Warning | CAR | 17 hr |
| Sep 19, 3:02 PM EDT | Freeze Warning | GYX | 16 hr |
| Sep 20, 12:32 PM EDT | Freeze Warning | CAR | 20 hr |
| Sep 29, 2:37 PM EDT | Wind Advisory | CAR | 24 hr |
| Sep 29, 3:04 PM EDT | Wind Advisory | GYX | 23 hr |
| Oct 7, 5:14 PM EDT | Wind Advisory | CAR | 25 hr |
| Oct 10, 4:30 PM EDT | Special Weather Statement | GYX | 60 min |
| Oct 10, 5:15 PM EDT | Special Weather Statement | GYX | 30 min |
| Oct 10, 7:32 PM EDT | Special Weather Statement | GYX | 13 min |
| Oct 10, 7:43 PM EDT | Special Weather Statement | GYX | 47 min |
| Oct 10, 8:26 PM EDT | Special Weather Statement | GYX | 64 min |
| Oct 17, 8:42 AM EDT | Winter Weather Advisory | CAR | 11 hr |
| Nov 8, 9:44 PM EST | Dense Fog Advisory | GYX | 12 hr |
| Nov 15, 4:44 AM EST | Winter Weather Advisory | CAR | 26 hr |
| Nov 22, 2:51 AM EST | Winter Weather Advisory | CAR | 43 hr |
| Nov 23, 10:56 AM EST | Areal Flood Advisory | GYX | 3 hr |
| Nov 23, 12:06 PM EST | Winter Weather Advisory | CAR | 10 hr |
| Nov 25, 3:00 AM EST | Winter Weather Advisory | CAR | 19 hr |
| Nov 25, 3:13 PM EST | Winter Weather Advisory | GYX | 21 hr |
| Nov 26, 2:51 AM EST | Winter Weather Advisory | CAR | 18 hr |
| Nov 30, 2:33 AM EST | Wind Advisory | GYX | 28 hr |
| Nov 30, 2:32 PM EST | Flood Watch | GYX | 24 hr |
| Dec 1, 8:49 AM EST | River Flood Warning | GYX | 25 hr |
| Dec 3, 3:57 PM EST | Winter Storm Watch | GYX | 36 hr |
| Dec 4, 3:48 AM EST | Winter Storm Watch | CAR | 25 hr |
| Dec 4, 3:45 PM EST | Winter Storm Warning | CAR | 51 hr |
| Dec 4, 4:06 PM EST | Winter Storm Warning | GYX | 42 hr |
| Dec 5, 11:57 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 5, 7:01 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 11, 3:24 PM EST | Winter Weather Advisory | CAR | 51 hr |
| Dec 12, 3:10 AM EST | Winter Weather Advisory | GYX | 24 hr |
| Dec 13, 12:57 PM EST | Dense Fog Advisory | GYX | 3 hr |
| Dec 14, 3:32 PM EST | Wind Chill Advisory | CAR | 35 hr |
| Dec 15, 3:05 AM EST | Wind Chill Advisory | GYX | 26 hr |
| Dec 20, 11:51 PM EST | Dense Fog Advisory | GYX | 9 hr |
| Dec 22, 3:13 PM EST | High Wind Watch | CAR | 48 hr |
| Dec 23, 1:50 PM EST | Flood Watch | GYX | 60 hr |
| Dec 24, 3:05 PM EST | Wind Advisory | CAR | 24 hr |
| Dec 24, 3:39 PM EST | Wind Advisory | GYX | 24 hr |
| Dec 24, 9:33 PM EST | River Flood Warning | GYX | 71 hr |
| Dec 25, 12:03 PM EST | River Flood Warning | GYX | 24 hr |
| Dec 25, 12:03 PM EST | River Flood Warning | GYX | 32 hr |
| Dec 30, 4:37 PM EST | Winter Weather Advisory | CAR | 14 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 | 20 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 11 |
| Special Weather Statement | 23 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 6 |
| Flash Flood Watch | 1 |
| Flood Watch | 4 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Warning | 12 |
| Winter Storm Watch | 14 |
| Winter Weather Advisory | 27 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 13 |
| Freeze Watch | 3 |
| Frost Advisory | 10 |
| Wind Chill Advisory | 9 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 16 |
| Fog and smoke | |
| Dense Fog Advisory | 9 |
| Tropical | |
| Tropical Storm Watch | 2 |
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.