Alert archive / Maine / Knox County
Weather alerts in Knox County, Maine, 2009
60 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 60
- Warnings
- 13
- Watches
- 15
- Advisories
- 25
- Busiest month
- December14 alerts
- Busiest day
- August 5, 20094 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, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 1 | 67% | 2 | 0% | |
| Flash flood warnings | 0 | 0 |
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 |
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 6, 3:26 AM EST | Winter Storm Watch | GYX | 14 hr |
| Jan 6, 5:10 PM EST | Winter Weather Advisory | GYX | 34 hr |
| Jan 7, 11:39 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 10, 3:38 AM EST | Winter Storm Watch | GYX | 12 hr |
| Jan 10, 2:44 PM EST | Coastal Flood Warning | GYX | 21 hr |
| Jan 10, 3:11 PM EST | Winter Weather Advisory | GYX | 23 hr |
| Jan 17, 3:15 AM EST | Winter Storm Watch | GYX | 12 hr |
| Jan 17, 3:00 PM EST | Winter Storm Warning | GYX | 40 hr |
| Jan 26, 3:03 PM EST | Winter Storm Watch | GYX | 18 hr |
| Jan 27, 2:43 AM EST | Winter Storm Warning | GYX | 51 hr |
| Jan 28, 12:26 PM EST | Mesoscale Discussion | SPC | 6 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, 4:09 AM EST | Winter Weather Advisory | GYX | 24 hr |
| Feb 21, 4:07 AM EST | Winter Storm Watch | GYX | 12 hr |
| Feb 21, 3:44 PM EST | Winter Storm Warning | GYX | 43 hr |
| Feb 28, 3:25 PM EST | Winter Storm Watch | GYX | 12 hr |
| Mar 1, 3:09 AM EST | Winter Storm Warning | GYX | 34 hr |
| Apr 2, 3:15 PM EDT | Flood Watch | GYX | 44 hr |
| Apr 5, 3:38 PM EDT | Flood Watch | GYX | 43 hr |
| Apr 6, 11:57 PM EDT | Areal Flood Advisory | GYX | 6 hr |
| Apr 7, 5:48 AM EDT | Areal Flood Advisory | GYX | 6 hr |
| Apr 21, 7:51 PM EDT | Areal Flood Advisory | GYX | 6 hr |
| May 14, 3:19 AM EDT | Wind Advisory | GYX | 17 hr |
| May 18, 3:06 AM EDT | Frost Advisory | GYX | 28 hr |
| Jun 21, 3:12 PM EDT | Coastal Flood Advisory | GYX | 34 hr |
| Jul 2, 10:51 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jul 23, 3:28 PM EDT | Flood Watch | GYX | 23 hr |
| Jul 27, 6:03 PM EDT | Severe Thunderstorm Warning | GYX | 57 min |
| Aug 5, 1:44 PM EDT | Severe Thunderstorm Warning | GYX | 49 min |
| Aug 5, 2:14 PM EDT | Severe Thunderstorm Warning | GYX | 61 min |
| Aug 5, 2:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Aug 5, 2:32 PM EDT | Areal Flood Advisory | GYX | 118 min |
| Aug 11, 4:31 PM EDT | Areal Flood Advisory | GYX | 119 min |
| Aug 21, 4:22 PM EDT | Tornado Watch | SPC | 3 hr |
| Aug 22, 4:22 AM EDT | Coastal Flood Advisory | GYX | 35 hr |
| Aug 22, 3:36 PM EDT | High Surf Advisory | GYX | 27 hr |
| Aug 23, 6:03 AM EDT | Areal Flood Warning | GYX | 4 hr |
| Aug 23, 6:26 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Aug 29, 8:00 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Sep 25, 3:48 AM EDT | Frost Advisory | GYX | 28 hr |
| Oct 4, 1:16 AM EDT | Areal Flood Advisory | GYX | 119 min |
| Oct 17, 3:31 AM EDT | Coastal Flood Watch | GYX | 29 hr |
| Oct 31, 3:01 AM EDT | Wind Advisory | GYX | 21 hr |
| Nov 14, 3:21 AM EST | Coastal Flood Statement | GYX | 37 hr |
| Nov 28, 2:37 AM EST | Wind Advisory | GYX | 15 hr |
| Dec 2, 3:15 AM EST | Coastal Flood Watch | GYX | 24 hr |
| Dec 2, 2:36 PM EST | Wind Advisory | GYX | 22 hr |
| Dec 2, 3:00 PM EST | Coastal Flood Warning | GYX | 21 hr |
| Dec 3, 3:14 AM EST | Coastal Flood Advisory | GYX | 5 hr |
| Dec 5, 12:40 PM EST | Winter Weather Advisory | GYX | 17 hr |
| Dec 8, 3:19 AM EST | Winter Storm Watch | GYX | 13 hr |
| Dec 8, 3:24 AM EST | High Wind Watch | GYX | 12 hr |
| Dec 8, 3:42 PM EST | High Wind Warning | GYX | 30 hr |
| Dec 8, 4:13 PM EST | Winter Storm Warning | GYX | 30 hr |
| Dec 9, 3:47 AM EST | Coastal Flood Statement | GYX | 11 hr |
| Dec 9, 2:43 PM EST | Coastal Flood Statement | GYX | 36 min |
| Dec 9, 2:43 PM EST | Coastal Flood Advisory | GYX | 4 hr |
| Dec 9, 9:14 PM EST | Coastal Flood Statement | GYX | 10 hr |
| Dec 29, 3:26 AM EST | Wind 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 | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 3 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flood Watch | 3 |
| Areal Flood Advisory | 9 |
| Winter | |
| Winter Storm Warning | 6 |
| Winter Storm Watch | 8 |
| Winter Weather Advisory | 4 |
| Cold | |
| Frost Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Coast and beach | |
| Coastal Flood Warning | 2 |
| Coastal Flood Watch | 2 |
| Coastal Flood Advisory | 4 |
| High Surf Advisory | 1 |
| Coastal Flood Statement | 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.