Alert archive / Maine / Somerset County
Weather alerts in Somerset County, Maine, 2009
177 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 177
- Warnings
- 64
- Watches
- 28
- Advisories
- 72
- Busiest month
- December28 alerts
- Busiest day
- June 26, 200912 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, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 25 | 5 | 80% | 1 | 100% | 21 min |
| Flash flood warnings | 7 | 3 | 57% | 3 | 100% | 161 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gray, ME: tornado warnings | 6 | 2 | 67% | 3 | 67% | 7 min |
| NWS Gray, ME: severe thunderstorm warnings | 117 | 51 | 56% | 85 | 87% | 22 min |
| NWS Gray, ME: flash flood warnings | 15 | 5 | 67% | 9 | 78% | 108 min |
| NWS Caribou, ME: tornado warnings | 3 | 3 | 0% | 13 | 92% | 16 min |
| NWS Caribou, ME: severe thunderstorm warnings | 52 | 19 | 63% | 43 | 93% | 28 min |
| NWS Caribou, ME: flash flood warnings | 16 | 8 | 50% | 21 | 100% | 65 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 1, 10:04 AM EST | Wind Chill Advisory | GYX | 3 hr |
| Jan 6, 3:05 AM EST | Winter Storm Watch | CAR | 13 hr |
| Jan 6, 3:26 AM EST | Winter Storm Watch | GYX | 14 hr |
| Jan 6, 3:40 PM EST | Winter Storm Warning | CAR | 39 hr |
| Jan 6, 5:10 PM EST | Winter Storm Warning | GYX | 34 hr |
| Jan 7, 11:39 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 14, 4:22 AM EST | Wind Chill Advisory | CAR | 62 hr |
| Jan 14, 10:41 AM EST | Wind Chill Advisory | GYX | 7 hr |
| Jan 14, 3:47 PM EST | Wind Chill Warning | CAR | 50 hr |
| Jan 17, 3:15 AM EST | Winter Storm Watch | GYX | 12 hr |
| Jan 17, 2:48 PM EST | Winter Weather Advisory | CAR | 45 hr |
| Jan 17, 3:00 PM EST | Winter Storm Warning | GYX | 40 hr |
| Jan 17, 3:00 PM EST | Winter Weather Advisory | GYX | 24 hr |
| Jan 23, 10:41 PM EST | Winter Weather Advisory | CAR | 5 hr |
| Jan 24, 2:32 AM EST | Wind Chill Advisory | GYX | 31 hr |
| Jan 24, 4:06 AM EST | Wind Chill Warning | CAR | 30 hr |
| Jan 26, 3:03 PM EST | Winter Storm Watch | GYX | 18 hr |
| Jan 26, 3:20 PM EST | Winter Storm Watch | CAR | 20 hr |
| Jan 27, 2:43 AM EST | Winter Storm Warning | GYX | 51 hr |
| Jan 27, 11:21 AM EST | Winter Storm Warning | CAR | 43 hr |
| Jan 28, 12:26 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 28, 6:12 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 7, 3:25 PM EST | Winter Weather Advisory | CAR | 12 hr |
| Feb 8, 8:11 PM EST | Wind Chill Advisory | CAR | 16 hr |
| Feb 10, 3:03 AM EST | Winter Weather Advisory | GYX | 11 hr |
| Feb 10, 2:46 PM EST | Winter Weather Advisory | CAR | 17 hr |
| Feb 11, 2:53 PM EST | Winter Weather Advisory | CAR | 23 hr |
| Feb 12, 11:00 PM EST | Wind Advisory | CAR | 12 hr |
| Feb 14, 4:20 AM EST | Wind Advisory | CAR | 14 hr |
| Feb 17, 2:57 PM EST | Winter Storm Watch | CAR | 23 hr |
| Feb 17, 3:42 PM EST | Winter Storm Watch | GYX | 12 hr |
| Feb 18, 4:09 AM EST | Winter Storm Warning | GYX | 27 hr |
| Feb 18, 2:24 PM EST | Winter Weather Advisory | CAR | 32 hr |
| Feb 20, 3:13 PM EST | Winter Storm Watch | CAR | 24 hr |
| Feb 21, 4:07 AM EST | Winter Storm Watch | GYX | 12 hr |
| Feb 21, 3:35 PM EST | Winter Storm Warning | CAR | 48 hr |
| Feb 21, 3:44 PM EST | Winter Storm Warning | GYX | 43 hr |
| Feb 22, 6:00 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 23, 12:14 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 23, 4:42 PM EST | Winter Weather Advisory | CAR | 5 hr |
| Feb 28, 3:25 PM EST | Winter Storm Watch | GYX | 12 hr |
| Mar 1, 3:09 AM EST | Winter Storm Watch | GYX | 12 hr |
| Mar 1, 3:09 AM EST | Winter Storm Warning | GYX | 34 hr |
| Mar 1, 9:45 PM EST | Winter Weather Advisory | CAR | 18 hr |
| Mar 6, 4:23 AM EST | Winter Weather Advisory | CAR | 18 hr |
| Mar 7, 3:24 AM EST | Winter Weather Advisory | GYX | 26 hr |
| Mar 10, 3:36 PM EDT | Winter Weather Advisory | GYX | 19 hr |
| Mar 11, 4:02 AM EDT | Winter Weather Advisory | CAR | 10 hr |
| Mar 12, 12:03 AM EDT | Wind Advisory | CAR | 7 hr |
| Mar 18, 7:00 AM EDT | Freezing Rain Advisory | CAR | 3 hr |
| Apr 2, 3:15 PM EDT | Flood Watch | GYX | 44 hr |
| Apr 4, 7:04 AM EDT | River Flood Warning | GYX | 16 hr |
| Apr 4, 7:58 AM EDT | Dense Fog Advisory | CAR | 4 hr |
| Apr 5, 3:38 PM EDT | Flood Watch | GYX | 43 hr |
| Apr 5, 3:56 PM EDT | Flood Watch | CAR | 3 days |
| Apr 6, 10:15 PM EDT | River Flood Warning | GYX | 41 hr |
| Apr 6, 10:15 PM EDT | River Flood Warning | GYX | 10 hr |
| Apr 22, 4:20 AM EDT | Flood Watch | CAR | 35 hr |
| May 13, 2:39 PM EDT | Wind Advisory | CAR | 22 hr |
| May 14, 3:19 AM EDT | Wind Advisory | GYX | 17 hr |
| May 14, 1:04 PM EDT | High Wind Warning | CAR | 9 hr |
| May 18, 3:06 AM EDT | Frost Advisory | GYX | 28 hr |
| May 18, 4:47 AM EDT | Freeze Warning | CAR | 24 hr |
| May 22, 2:57 PM EDT | Freeze Warning | CAR | 13 hr |
| May 25, 3:08 AM EDT | Frost Advisory | GYX | 28 hr |
| May 25, 4:00 AM EDT | Freeze Warning | CAR | 26 hr |
| May 31, 2:17 PM EDT | Frost Advisory | GYX | 17 hr |
| May 31, 2:32 PM EDT | Severe Thunderstorm Warning | CAR | 43 min |
| May 31, 2:52 PM EDT | Severe Thunderstorm Warning | GYX | 32 min |
| May 31, 3:18 PM EDT | Severe Thunderstorm Warning | CAR | 42 min |
| May 31, 5:35 PM EDT | Severe Thunderstorm Warning | GYX | 40 min |
| Jun 2, 3:09 PM EDT | Frost Advisory | CAR | 12 hr |
| Jun 4, 2:45 PM EDT | Frost Advisory | GYX | 16 hr |
| Jun 8, 3:14 PM EDT | Freeze Warning | CAR | 14 hr |
| Jun 25, 3:38 AM EDT | Dense Fog Advisory | CAR | 5 hr |
| Jun 25, 3:02 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jun 26, 9:41 AM EDT | Severe Thunderstorm Warning | CAR | 64 min |
| Jun 26, 10:44 AM EDT | Severe Thunderstorm Warning | CAR | 72 min |
| Jun 26, 11:39 AM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 26, 12:05 PM EDT | Severe Thunderstorm Warning | GYX | 55 min |
| Jun 26, 12:13 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 26, 12:54 PM EDT | Severe Thunderstorm Warning | GYX | 51 min |
| Jun 26, 1:34 PM EDT | Severe Thunderstorm Warning | GYX | 41 min |
| Jun 26, 2:14 PM EDT | Severe Thunderstorm Warning | GYX | 46 min |
| Jun 26, 2:18 PM EDT | Flash Flood Warning | GYX | 3 hr |
| Jun 26, 3:26 PM EDT | Severe Thunderstorm Warning | GYX | 64 min |
| Jun 26, 4:06 PM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| Jun 26, 4:50 PM EDT | Severe Thunderstorm Warning | GYX | 30 min |
| Jun 27, 2:14 AM EDT | Areal Flood Advisory | GYX | 91 min |
| Jun 27, 4:15 AM EDT | Areal Flood Advisory | GYX | 2 hr |
| Jun 28, 2:29 PM EDT | Flood Watch | CAR | 18 hr |
| Jun 29, 3:54 AM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jun 29, 1:48 PM EDT | River Flood Warning | GYX | 36 hr |
| Jul 2, 10:17 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jul 3, 7:27 PM EDT | Flash Flood Warning | GYX | 3 hr |
| Jul 6, 7:53 PM EDT | Flash Flood Warning | GYX | 3 hr |
| Jul 6, 7:56 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jul 6, 10:46 PM EDT | Flash Flood Warning | GYX | 3 hr |
| Jul 13, 2:54 PM EDT | Severe Thunderstorm Warning | GYX | 51 min |
| Jul 26, 5:52 PM EDT | Severe Thunderstorm Warning | GYX | 38 min |
| Jul 27, 4:19 AM EDT | Severe Thunderstorm Warning | GYX | 41 min |
| Jul 27, 4:43 AM EDT | Severe Thunderstorm Warning | GYX | 32 min |
| Jul 27, 11:02 AM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 27, 2:38 PM EDT | Severe Thunderstorm Warning | GYX | 37 min |
| Jul 27, 2:42 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 27, 3:07 PM EDT | Severe Thunderstorm Warning | GYX | 38 min |
| Jul 27, 3:52 PM EDT | Severe Thunderstorm Warning | GYX | 38 min |
| Jul 27, 4:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 27, 6:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 29, 3:11 PM EDT | Flash Flood Watch | GYX | 19 hr |
| Jul 29, 4:18 PM EDT | Flash Flood Watch | CAR | 20 hr |
| Aug 11, 3:32 AM EDT | Dense Fog Advisory | CAR | 5 hr |
| Aug 13, 4:21 PM EDT | Flash Flood Warning | CAR | 3 hr |
| Aug 21, 10:47 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 21, 3:54 PM EDT | Severe Thunderstorm Warning | CAR | 51 min |
| Aug 21, 4:22 PM EDT | Tornado Watch | SPC | 3 hr |
| Aug 21, 4:44 PM EDT | Severe Thunderstorm Warning | CAR | 61 min |
| Aug 21, 5:26 PM EDT | Severe Thunderstorm Warning | GYX | 64 min |
| Aug 21, 5:55 PM EDT | Mesoscale Discussion | SPC | 80 min |
| Aug 21, 6:09 PM EDT | Flash Flood Warning | CAR | 3 hr |
| Aug 21, 6:09 PM EDT | Severe Thunderstorm Warning | GYX | 51 min |
| Aug 21, 6:16 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Aug 21, 6:26 PM EDT | Severe Thunderstorm Warning | GYX | 64 min |
| Aug 22, 9:23 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Aug 22, 9:56 PM EDT | Flash Flood Warning | GYX | 3 hr |
| Aug 27, 3:36 AM EDT | Frost Advisory | CAR | 27 hr |
| Aug 31, 2:53 PM EDT | Frost Advisory | CAR | 16 hr |
| Aug 31, 3:47 PM EDT | Frost Advisory | GYX | 16 hr |
| Sep 5, 3:08 PM EDT | Freeze Warning | CAR | 16 hr |
| Sep 9, 2:59 PM EDT | Freeze Warning | CAR | 16 hr |
| Sep 15, 3:28 PM EDT | Frost Advisory | CAR | 11 hr |
| Sep 16, 2:25 AM EDT | Frost Advisory | GYX | 30 hr |
| Sep 16, 2:51 AM EDT | Freeze Warning | CAR | 29 hr |
| Sep 19, 2:43 AM EDT | Frost Advisory | GYX | 29 hr |
| Sep 19, 2:43 AM EDT | Freeze Warning | GYX | 29 hr |
| Sep 19, 3:47 PM EDT | Freeze Warning | CAR | 14 hr |
| Sep 25, 3:48 AM EDT | Freeze Warning | GYX | 28 hr |
| Oct 13, 3:27 AM EDT | Winter Weather Advisory | GYX | 8 hr |
| Oct 21, 3:07 PM EDT | Winter Weather Advisory | CAR | 31 hr |
| Oct 23, 3:10 PM EDT | Winter Weather Advisory | CAR | 21 hr |
| Oct 24, 2:43 AM EDT | Mesoscale Discussion | SPC | 6 hr |
| Oct 24, 3:09 AM EDT | Winter Weather Advisory | GYX | 6 hr |
| Oct 31, 3:01 AM EDT | Wind Advisory | GYX | 21 hr |
| Nov 14, 10:54 PM EST | Areal Flood Warning | GYX | 13 hr |
| Nov 26, 9:56 PM EST | Dense Fog Advisory | CAR | 5 hr |
| Nov 27, 3:50 AM EST | Winter Weather Advisory | GYX | 30 hr |
| Nov 27, 3:16 PM EST | Winter Weather Advisory | CAR | 24 hr |
| Nov 28, 2:37 AM EST | Wind Advisory | GYX | 15 hr |
| Nov 28, 3:45 AM EST | Wind Advisory | CAR | 14 hr |
| Dec 3, 3:37 AM EST | Winter Weather Advisory | CAR | 9 hr |
| Dec 8, 3:19 AM EST | Winter Storm Watch | GYX | 13 hr |
| Dec 8, 5:01 AM EST | Winter Storm Watch | CAR | 11 hr |
| Dec 8, 3:33 PM EST | Winter Storm Warning | CAR | 35 hr |
| Dec 8, 4:13 PM EST | Winter Storm Warning | GYX | 30 hr |
| Dec 9, 6:33 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 9, 12:41 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 11, 3:30 AM EST | Wind Advisory | GYX | 16 hr |
| Dec 11, 3:49 AM EST | Wind Advisory | CAR | 15 hr |
| Dec 13, 12:38 PM EST | Winter Weather Advisory | GYX | 10 hr |
| Dec 16, 3:46 AM EST | Wind Chill Advisory | CAR | 54 hr |
| Dec 16, 3:00 PM EST | Wind Chill Advisory | GYX | 21 hr |
| Dec 17, 3:19 PM EST | Wind Chill Advisory | GYX | 18 hr |
| Dec 21, 3:34 PM EST | Winter Storm Watch | CAR | 12 hr |
| Dec 22, 2:57 AM EST | Winter Storm Watch | GYX | 12 hr |
| Dec 22, 2:57 AM EST | Winter Storm Warning | GYX | 33 hr |
| Dec 22, 3:50 AM EST | Winter Storm Warning | CAR | 39 hr |
| Dec 22, 8:55 PM EST | Winter Weather Advisory | GYX | 15 hr |
| Dec 26, 3:14 PM EST | Winter Weather Advisory | GYX | 16 hr |
| Dec 26, 4:00 PM EST | Winter Weather Advisory | CAR | 27 hr |
| Dec 27, 2:52 PM EST | Winter Storm Watch | GYX | 13 hr |
| Dec 27, 3:31 PM EST | Winter Storm Watch | CAR | 13 hr |
| Dec 28, 3:36 AM EST | Winter Storm Warning | GYX | 22 hr |
| Dec 28, 4:19 AM EST | Winter Weather Advisory | CAR | 27 hr |
| Dec 29, 3:26 AM EST | Wind Advisory | GYX | 16 hr |
| Dec 29, 3:56 AM EST | Wind Chill Advisory | CAR | 32 hr |
| Dec 29, 4:10 AM EST | Wind Advisory | CAR | 24 hr |
| Dec 29, 11:13 AM EST | Wind Chill Advisory | GYX | 16 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 | 25 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 13 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 7 |
| River Flood Warning | 4 |
| Flash Flood Watch | 2 |
| Flood Watch | 5 |
| Areal Flood Advisory | 8 |
| Winter | |
| Winter Storm Warning | 14 |
| Winter Storm Watch | 17 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 26 |
| Cold | |
| Freeze Warning | 10 |
| Wind Chill Warning | 2 |
| Frost Advisory | 11 |
| Wind Chill Advisory | 10 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 12 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.