Alert archive / Maine / Penobscot County
Weather alerts in Penobscot County, Maine, 2020
129 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Penobscot County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 129
- Warnings
- 30
- Watches
- 15
- Advisories
- 58
- Busiest month
- July27 alerts
- Busiest day
- July 2, 20205 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Penobscot County in 2020 had a tornado report inside them.
Penobscot County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 11 | 6 | 45% | 8 | 88% | 35 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| 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, 4:48 AM EST | Winter Storm Watch | CAR | 23 hr |
| Jan 10, 3:16 PM EST | Winter Storm Warning | CAR | 49 hr |
| Jan 11, 4:07 AM EST | Ice Storm Warning | CAR | 30 hr |
| Jan 11, 4:07 AM EST | Winter Weather Advisory | CAR | 35 hr |
| Jan 15, 3:28 AM EST | Winter Weather Advisory | CAR | 39 hr |
| Jan 16, 3:17 PM EST | Wind Chill Advisory | CAR | 37 hr |
| Jan 16, 3:17 PM EST | Winter Weather Advisory | CAR | 24 hr |
| Jan 17, 3:26 PM EST | Winter Storm Watch | CAR | 12 hr |
| Jan 18, 3:20 AM EST | Winter Weather Advisory | CAR | 45 hr |
| Jan 18, 2:29 PM EST | Winter Storm Warning | CAR | 25 hr |
| Jan 25, 2:32 AM EST | Winter Weather Advisory | CAR | 51 hr |
| Feb 5, 4:14 AM EST | Winter Storm Watch | CAR | 12 hr |
| Feb 5, 3:47 PM EST | Winter Storm Warning | CAR | 59 hr |
| Feb 5, 3:47 PM EST | Winter Weather Advisory | CAR | 46 hr |
| Feb 7, 6:00 PM EST | Special Weather Statement | CAR | 90 min |
| Feb 10, 3:55 AM EST | Winter Weather Advisory | CAR | 9 hr |
| Feb 13, 3:03 AM EST | Wind Chill Advisory | CAR | 33 hr |
| Feb 17, 3:04 PM EST | Winter Weather Advisory | CAR | 36 hr |
| Feb 25, 4:20 AM EST | Winter Storm Watch | CAR | 24 hr |
| Feb 26, 4:31 AM EST | Winter Storm Warning | CAR | 48 hr |
| Feb 26, 4:31 AM EST | Winter Weather Advisory | CAR | 24 hr |
| Feb 27, 4:13 AM EST | Winter Weather Advisory | CAR | 15 hr |
| Mar 3, 2:45 PM EST | Wind Advisory | CAR | 27 hr |
| Mar 9, 3:16 AM EDT | Winter Weather Advisory | CAR | 43 hr |
| Mar 14, 3:18 AM EDT | Wind Advisory | CAR | 15 hr |
| Mar 23, 9:31 AM EDT | Winter Weather Advisory | CAR | 23 hr |
| Mar 23, 9:33 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 29, 3:31 AM EDT | Winter Weather Advisory | CAR | 36 hr |
| Mar 29, 6:13 PM EDT | Winter Weather Advisory | CAR | 22 hr |
| Apr 7, 3:19 AM EDT | Winter Storm Watch | CAR | 36 hr |
| Apr 8, 3:44 PM EDT | Winter Storm Warning | CAR | 49 hr |
| Apr 8, 3:44 PM EDT | Winter Weather Advisory | CAR | 41 hr |
| Apr 9, 3:21 PM EDT | River Flood Warning | CAR | 10 hr |
| Apr 12, 3:49 AM EDT | High Wind Watch | CAR | 11 hr |
| Apr 12, 2:47 PM EDT | Wind Advisory | CAR | 33 hr |
| Apr 12, 2:52 PM EDT | Flood Watch | CAR | 69 hr |
| Apr 14, 12:22 PM EDT | River Flood Warning | CAR | 5 days |
| Apr 21, 10:16 PM EDT | Winter Weather Advisory | CAR | 6 hr |
| May 4, 2:30 AM EDT | Special Weather Statement | CAR | 45 min |
| May 4, 2:59 AM EDT | Special Weather Statement | CAR | 46 min |
| May 8, 4:26 AM EDT | Winter Weather Advisory | CAR | 42 hr |
| May 12, 3:00 PM EDT | Freeze Warning | CAR | 16 hr |
| May 13, 3:21 PM EDT | Freeze Warning | CAR | 16 hr |
| May 23, 3:01 AM EDT | Frost Advisory | CAR | 27 hr |
| May 27, 2:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| May 30, 10:53 AM EDT | Special Weather Statement | CAR | 22 min |
| May 31, 3:26 PM EDT | Frost Advisory | CAR | 15 hr |
| Jun 1, 3:03 PM EDT | Frost Advisory | CAR | 16 hr |
| Jun 1, 3:03 PM EDT | Freeze Warning | CAR | 16 hr |
| Jun 5, 4:01 PM EDT | Special Weather Statement | CAR | 44 min |
| Jun 19, 10:33 AM EDT | Heat Advisory | CAR | 8 hr |
| Jun 20, 7:46 PM EDT | Areal Flood Advisory | CAR | 3 hr |
| Jun 20, 9:30 PM EDT | Areal Flood Advisory | CAR | 3 hr |
| Jun 25, 6:19 AM EDT | Dense Fog Advisory | CAR | 3 hr |
| Jun 26, 2:16 PM EDT | Areal Flood Advisory | CAR | 75 min |
| Jul 2, 2:41 PM EDT | Mesoscale Discussion | SPC | 109 min |
| Jul 2, 3:50 PM EDT | Severe Thunderstorm Warning | CAR | 55 min |
| Jul 2, 4:45 PM EDT | Severe Thunderstorm Warning | CAR | 45 min |
| Jul 2, 5:52 PM EDT | Severe Thunderstorm Warning | CAR | 38 min |
| Jul 2, 6:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 4, 3:25 PM EDT | Special Weather Statement | CAR | 50 min |
| Jul 4, 4:17 PM EDT | Severe Thunderstorm Warning | CAR | 24 min |
| Jul 4, 4:48 PM EDT | Special Weather Statement | CAR | 27 min |
| Jul 8, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 4:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 8, 5:16 PM EDT | Severe Thunderstorm Warning | CAR | 44 min |
| Jul 9, 5:20 AM EDT | Dense Fog Advisory | CAR | 4 hr |
| Jul 9, 6:05 PM EDT | Severe Thunderstorm Warning | CAR | 55 min |
| Jul 9, 8:01 PM EDT | Dense Fog Advisory | CAR | 14 hr |
| Jul 13, 3:30 PM EDT | Severe Thunderstorm Warning | CAR | 45 min |
| Jul 13, 4:34 PM EDT | Special Weather Statement | CAR | 41 min |
| Jul 18, 6:06 AM EDT | Dense Fog Advisory | CAR | 3 hr |
| Jul 18, 3:41 PM EDT | Special Weather Statement | CAR | 34 min |
| Jul 20, 4:14 AM EDT | Heat Advisory | CAR | 14 hr |
| Jul 23, 6:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 27, 4:47 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 27, 6:48 PM EDT | Severe Thunderstorm Warning | CAR | 57 min |
| Jul 27, 7:15 PM EDT | Tornado Warning | CAR | 30 min |
| Jul 27, 7:45 PM EDT | Severe Thunderstorm Warning | CAR | 45 min |
| Jul 28, 5:53 PM EDT | Special Weather Statement | CAR | 37 min |
| Jul 30, 4:45 PM EDT | Areal Flood Advisory | CAR | 3 hr |
| Jul 30, 6:16 PM EDT | Special Weather Statement | CAR | 44 min |
| Aug 3, 11:13 AM EDT | Tropical Storm Watch | CAR | 30 hr |
| Aug 5, 12:15 AM EDT | Wind Advisory | CAR | 4 hr |
| Aug 9, 10:04 PM EDT | Special Weather Statement | CAR | 56 min |
| Aug 9, 10:39 PM EDT | Special Weather Statement | CAR | 21 min |
| Aug 11, 4:13 AM EDT | Dense Fog Advisory | CAR | 4 hr |
| Aug 11, 4:13 AM EDT | Heat Advisory | CAR | 14 hr |
| Aug 18, 9:28 PM EDT | Special Weather Statement | CAR | 32 min |
| Aug 25, 12:35 AM EDT | Dense Fog Advisory | CAR | 8 hr |
| Aug 25, 2:33 PM EDT | Special Weather Statement | CAR | 42 min |
| Aug 25, 2:46 PM EDT | Severe Thunderstorm Warning | CAR | 44 min |
| Aug 25, 2:57 PM EDT | Wind Advisory | CAR | 29 hr |
| Aug 25, 3:28 PM EDT | Severe Thunderstorm Warning | CAR | 47 min |
| Sep 11, 3:05 AM EDT | Frost Advisory | CAR | 29 hr |
| Sep 14, 2:50 AM EDT | Frost Advisory | CAR | 28 hr |
| Sep 16, 3:57 PM EDT | Freeze Watch | CAR | 11 hr |
| Sep 17, 2:47 AM EDT | Frost Advisory | CAR | 30 hr |
| Sep 18, 3:57 PM EDT | Frost Advisory | CAR | 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 20, 12:32 PM EDT | Freeze Warning | CAR | 20 hr |
| Sep 29, 2:37 PM EDT | High Wind Warning | CAR | 24 hr |
| Sep 29, 2:37 PM EDT | Wind Advisory | CAR | 24 hr |
| Sep 30, 1:26 PM EDT | Special Weather Statement | CAR | 94 min |
| Sep 30, 4:09 PM EDT | Special Weather Statement | CAR | 66 min |
| Oct 7, 5:14 PM EDT | Wind Advisory | CAR | 25 hr |
| Oct 10, 5:27 PM EDT | Special Weather Statement | CAR | 48 min |
| Nov 15, 3:09 PM EST | Wind Advisory | CAR | 14 hr |
| Nov 23, 11:31 AM EST | Areal Flood Advisory | CAR | 2 hr |
| Nov 23, 12:06 PM EST | Winter Weather Advisory | CAR | 10 hr |
| Nov 23, 12:31 PM EST | Areal Flood Advisory | CAR | 3 hr |
| Nov 23, 2:56 PM EST | Areal Flood Advisory | CAR | 3 hr |
| Nov 25, 3:00 AM EST | Winter Weather Advisory | CAR | 19 hr |
| Nov 29, 2:34 PM EST | High Wind Watch | CAR | 13 hr |
| Nov 30, 3:39 AM EST | Wind Advisory | CAR | 34 hr |
| Nov 30, 1:59 PM EST | Flood Watch | CAR | 26 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 5, 7:01 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 11, 3:24 PM EST | Winter Weather Advisory | CAR | 51 hr |
| Dec 16, 2:49 PM EST | Winter Weather Advisory | CAR | 29 hr |
| Dec 21, 2:00 AM EST | Dense Fog Advisory | CAR | 10 hr |
| Dec 22, 3:13 PM EST | High Wind Watch | CAR | 48 hr |
| Dec 23, 2:49 PM EST | Flood Watch | CAR | 64 hr |
| Dec 24, 9:41 AM EST | High Wind Warning | CAR | 32 hr |
| Dec 24, 3:05 PM EST | Wind Advisory | CAR | 24 hr |
| Dec 25, 9:20 AM EST | Areal Flood Warning | CAR | 21 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 | 11 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 8 |
| Special Weather Statement | 18 |
| Flooding | |
| Areal Flood Warning | 1 |
| River Flood Warning | 2 |
| Flood Watch | 3 |
| Areal Flood Advisory | 7 |
| Winter | |
| Ice Storm Warning | 1 |
| Winter Storm Warning | 6 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 22 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 1 |
| Frost Advisory | 7 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 3 |
| Wind Advisory | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
| Tropical | |
| Tropical Storm Watch | 1 |
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.