Alert archive / Massachusetts / Bristol County
Weather alerts in Bristol County, Massachusetts, 2022
122 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Bristol County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 122
- Warnings
- 21
- Watches
- 13
- Advisories
- 46
- Busiest month
- January20 alerts
- Busiest day
- July 14, 20224 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Bristol County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 5 | 5 | 0% | 3 | 100% | 8 min |
| Flash flood warnings | 3 | 2 | 33% | 2 | 100% | 38 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boston/Norton, MA: tornado warnings | 2 | 0 | 100% | 0 | ||
| NWS Boston/Norton, MA: severe thunderstorm warnings | 63 | 46 | 27% | 231 | 77% | 27 min |
| NWS Boston/Norton, MA: flash flood warnings | 10 | 2 | 80% | 4 | 75% | 37 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, 1:05 AM EST | Dense Fog Advisory | BOX | 11 hr |
| Jan 1, 6:01 PM EST | Dense Fog Advisory | BOX | 10 hr |
| Jan 5, 2:08 PM EST | Winter Storm Watch | BOX | 13 hr |
| Jan 6, 3:24 AM EST | Winter Storm Warning | BOX | 34 hr |
| Jan 7, 4:12 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 7, 7:44 AM EST | Special Weather Statement | BOX | 91 min |
| Jan 13, 3:25 PM EST | Wind Chill Advisory | BOX | 45 hr |
| Jan 13, 3:29 PM EST | Wind Advisory | BOX | 32 hr |
| Jan 15, 3:15 PM EST | High Wind Watch | BOX | 12 hr |
| Jan 16, 2:48 AM EST | High Wind Warning | BOX | 33 hr |
| Jan 16, 2:48 AM EST | Wind Advisory | BOX | 31 hr |
| Jan 16, 3:02 AM EST | Coastal Flood Advisory | BOX | 34 hr |
| Jan 17, 4:13 AM EST | Special Weather Statement | BOX | 62 min |
| Jan 17, 5:30 AM EST | Special Weather Statement | BOX | 90 min |
| Jan 26, 2:59 PM EST | Winter Storm Watch | BOX | 37 hr |
| Jan 28, 3:35 AM EST | Blizzard Warning | BOX | 43 hr |
| Jan 28, 3:35 AM EST | Winter Storm Warning | BOX | 44 hr |
| Jan 29, 4:25 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 29, 10:57 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 29, 5:48 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 3, 12:27 AM EST | Dense Fog Advisory | BOX | 12 hr |
| Feb 3, 2:44 AM EST | Winter Weather Advisory | BOX | 46 hr |
| Feb 3, 12:35 PM EST | Dense Fog Advisory | BOX | 12 hr |
| Feb 4, 10:20 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 4, 6:13 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Feb 12, 3:28 PM EST | Winter Weather Advisory | BOX | 43 hr |
| Feb 15, 2:40 PM EST | High Wind Watch | BOX | 36 hr |
| Feb 16, 2:44 PM EST | High Wind Warning | BOX | 42 hr |
| Feb 19, 12:58 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 22, 2:47 AM EST | Wind Advisory | BOX | 25 hr |
| Feb 22, 4:23 AM EST | Dense Fog Advisory | BOX | 5 hr |
| Feb 23, 3:00 AM EST | Winter Storm Watch | BOX | 34 hr |
| Feb 24, 2:54 AM EST | Winter Storm Warning | BOX | 36 hr |
| Feb 24, 1:00 PM EST | Winter Weather Advisory | BOX | 26 hr |
| Mar 6, 5:51 AM EST | Dense Fog Advisory | BOX | 4 hr |
| Mar 6, 10:01 AM EST | Dense Fog Advisory | BOX | 5 hr |
| Mar 6, 3:47 PM EST | Dense Fog Advisory | BOX | 3 hr |
| Mar 7, 8:52 PM EST | Mesoscale Discussion | SPC | 113 min |
| Mar 11, 3:01 PM EST | Wind Advisory | BOX | 42 hr |
| Mar 12, 6:51 AM EST | Dense Fog Advisory | BOX | 2 hr |
| Mar 17, 6:58 AM EDT | Dense Fog Advisory | BOX | 3 hr |
| Mar 19, 5:25 AM EDT | Dense Fog Advisory | BOX | 7 hr |
| Mar 31, 11:41 PM EDT | Special Weather Statement | BOX | 49 min |
| Mar 31, 11:56 PM EDT | Special Weather Statement | BOX | 49 min |
| Apr 8, 4:08 AM EDT | Special Weather Statement | BOX | 52 min |
| Apr 18, 3:26 AM EDT | Wind Advisory | BOX | 29 hr |
| Apr 20, 3:23 AM EDT | Frost Advisory | BOX | 28 hr |
| Apr 30, 3:16 PM EDT | Frost Advisory | BOX | 16 hr |
| May 12, 7:59 PM EDT | Dense Fog Advisory | BOX | 12 hr |
| May 13, 7:09 PM EDT | Dense Fog Advisory | BOX | 13 hr |
| May 14, 8:20 PM EDT | Dense Fog Advisory | BOX | 14 hr |
| May 15, 7:06 PM EDT | Dense Fog Advisory | BOX | 15 hr |
| May 16, 3:36 AM EDT | Coastal Flood Statement | BOX | 25 hr |
| May 20, 3:16 AM EDT | Dense Fog Advisory | BOX | 7 hr |
| May 20, 3:16 AM EDT | Heat Advisory | BOX | 65 hr |
| Jun 8, 7:00 AM EDT | Special Weather Statement | BOX | 60 min |
| Jun 9, 8:17 AM EDT | Special Weather Statement | BOX | 43 min |
| Jun 9, 8:44 AM EDT | Special Weather Statement | BOX | 61 min |
| Jun 13, 3:24 AM EDT | Special Weather Statement | BOX | 51 min |
| Jun 13, 4:22 AM EDT | Special Weather Statement | BOX | 53 min |
| Jun 17, 12:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 2:51 PM EDT | Severe Thunderstorm Warning | BOX | 39 min |
| Jul 2, 3:21 AM EDT | Severe Thunderstorm Warning | BOX | 54 min |
| Jul 2, 2:37 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 2, 4:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 3:16 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 4:30 PM EDT | Special Weather Statement | BOX | 45 min |
| Jul 14, 4:35 PM EDT | Special Weather Statement | BOX | 55 min |
| Jul 14, 4:50 PM EDT | Severe Thunderstorm Warning | BOX | 40 min |
| Jul 19, 3:36 AM EDT | Heat Advisory | BOX | 64 hr |
| Jul 22, 3:29 AM EDT | Heat Advisory | BOX | 4 days |
| Jul 24, 3:16 PM EDT | High Surf Advisory | BOX | 36 hr |
| Jul 25, 1:04 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 26, 4:47 AM EDT | Rip Current Statement | BOX | 15 hr |
| Aug 2, 2:26 PM EDT | Heat Advisory | BOX | 7 days |
| Aug 5, 5:15 PM EDT | Special Weather Statement | BOX | 45 min |
| Aug 5, 6:10 PM EDT | Special Weather Statement | BOX | 65 min |
| Aug 9, 3:02 AM EDT | Rip Current Statement | BOX | 17 hr |
| Aug 9, 4:59 PM EDT | Special Weather Statement | BOX | 61 min |
| Aug 9, 6:07 PM EDT | Special Weather Statement | BOX | 53 min |
| Aug 9, 8:14 PM EDT | Special Weather Statement | BOX | 61 min |
| Aug 9, 8:18 PM EDT | Special Weather Statement | BOX | 57 min |
| Aug 23, 3:22 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 23, 3:33 PM EDT | Areal Flood Warning | BOX | 21 min |
| Aug 23, 3:54 PM EDT | Flash Flood Warning | BOX | 3 hr |
| Aug 26, 3:24 PM EDT | Severe Thunderstorm Warning | BOX | 66 min |
| Aug 26, 3:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 26, 4:27 PM EDT | Severe Thunderstorm Warning | BOX | 42 min |
| Aug 26, 5:37 PM EDT | Special Weather Statement | BOX | 53 min |
| Sep 5, 3:08 AM EDT | Flood Watch | BOX | 34 hr |
| Sep 5, 1:38 PM EDT | Areal Flood Warning | BOX | 82 min |
| Sep 5, 2:39 PM EDT | Flash Flood Warning | BOX | 5 hr |
| Sep 6, 9:25 AM EDT | Areal Flood Warning | BOX | 6 hr |
| Sep 9, 9:26 AM EDT | High Surf Advisory | BOX | 59 hr |
| Sep 13, 8:47 AM EDT | Special Weather Statement | BOX | 88 min |
| Sep 13, 10:21 AM EDT | Flash Flood Warning | BOX | 114 min |
| Sep 21, 4:38 AM EDT | High Surf Advisory | BOX | 63 hr |
| Sep 22, 8:50 AM EDT | Special Weather Statement | BOX | 55 min |
| Sep 22, 9:47 AM EDT | Special Weather Statement | BOX | 58 min |
| Sep 22, 12:31 PM EDT | Special Weather Statement | BOX | 59 min |
| Sep 22, 1:35 PM EDT | Special Weather Statement | BOX | 55 min |
| Sep 26, 4:40 AM EDT | High Surf Advisory | BOX | 15 hr |
| Oct 8, 3:13 AM EDT | Frost Advisory | BOX | 29 hr |
| Oct 13, 2:45 PM EDT | Flood Watch | BOX | 15 hr |
| Oct 13, 3:37 PM EDT | Wind Advisory | BOX | 21 hr |
| Oct 24, 6:26 PM EDT | Dense Fog Advisory | BOX | 15 hr |
| Oct 25, 5:47 PM EDT | Dense Fog Advisory | BOX | 16 hr |
| Oct 27, 3:02 PM EDT | Frost Advisory | BOX | 16 hr |
| Oct 28, 3:17 PM EDT | Frost Advisory | BOX | 18 hr |
| Oct 29, 3:52 AM EDT | Freeze Watch | BOX | 11 hr |
| Oct 29, 3:00 PM EDT | Freeze Warning | BOX | 18 hr |
| Nov 8, 3:16 AM EST | Freeze Watch | BOX | 12 hr |
| Nov 8, 3:42 PM EST | Freeze Warning | BOX | 17 hr |
| Nov 10, 2:28 PM EST | Wind Advisory | BOX | 44 hr |
| Nov 27, 3:33 AM EST | Coastal Flood Statement | BOX | 21 hr |
| Nov 29, 2:57 AM EST | Wind Advisory | BOX | 60 hr |
| Dec 15, 3:25 AM EST | Wind Advisory | BOX | 42 hr |
| Dec 20, 2:44 PM EST | Coastal Flood Watch | BOX | 37 hr |
| Dec 21, 3:25 AM EST | High Wind Watch | BOX | 11 hr |
| Dec 21, 2:53 PM EST | High Wind Warning | BOX | 58 hr |
| Dec 22, 3:55 AM EST | Coastal Flood Warning | BOX | 34 hr |
| Dec 31, 1:36 PM EST | Dense Fog Advisory | BOX | 14 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
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.