Alert archive / Massachusetts / Bristol County
Weather alerts in Bristol County, Massachusetts, 2024
144 weather alerts in 2024, 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 2024. Tap one for its archive.
- Alerts
- 144
- Warnings
- 52
- Watches
- 25
- Advisories
- 35
- Busiest month
- August20 alerts
- Busiest day
- August 26, 20248 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 1 tornado warnings covering Bristol County in 2024 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Bristol County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 1 | 0% | |
| Severe thunderstorm warnings | 17 | 14 | 18% | 19 | 84% | 22 min |
| Flash flood warnings | 4 | 3 | 25% | 6 | 100% | 27 min |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boston/Norton, MA: tornado warnings | 4 | 1 | 75% | 2 | 50% | 0 min |
| NWS Boston/Norton, MA: severe thunderstorm warnings | 109 | 81 | 26% | 290 | 91% | 26 min |
| NWS Boston/Norton, MA: flash flood warnings | 21 | 5 | 76% | 13 | 85% | 59 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 4, 3:27 PM EST | Winter Storm Watch | BOX | 35 hr |
| Jan 6, 2:53 AM EST | Winter Weather Advisory | BOX | 43 hr |
| Jan 7, 12:16 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 8, 2:53 AM EST | High Wind Watch | BOX | 25 hr |
| Jan 8, 3:50 AM EST | Flood Watch | BOX | 5 days |
| Jan 8, 3:12 PM EST | High Wind Warning | BOX | 40 hr |
| Jan 8, 3:47 PM EST | Coastal Flood Watch | BOX | 20 hr |
| Jan 9, 11:20 AM EST | Coastal Flood Warning | BOX | 23 hr |
| Jan 9, 10:38 PM EST | Areal Flood Warning | BOX | 17 hr |
| Jan 10, 7:04 AM EST | Wind Advisory | BOX | 3 hr |
| Jan 10, 8:32 AM EST | River Flood Warning | BOX | 21 days |
| Jan 11, 3:23 AM EST | Coastal Flood Watch | BOX | 24 hr |
| Jan 11, 3:26 AM EST | High Wind Watch | BOX | 24 hr |
| Jan 12, 3:25 AM EST | Coastal Flood Warning | BOX | 37 hr |
| Jan 12, 3:31 AM EST | Wind Advisory | BOX | 32 hr |
| Jan 15, 3:40 PM EST | Winter Weather Advisory | BOX | 27 hr |
| Feb 10, 5:33 AM EST | Dense Fog Advisory | BOX | 3 hr |
| Feb 10, 3:25 PM EST | Winter Storm Watch | BOX | 48 hr |
| Feb 11, 2:41 PM EST | Winter Storm Warning | BOX | 50 hr |
| Feb 13, 8:27 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Feb 17, 2:28 PM EST | Snow Squall Warning | BOX | 32 min |
| Feb 17, 2:58 PM EST | Snow Squall Warning | BOX | 32 min |
| Feb 17, 2:59 PM EST | Snow Squall Warning | BOX | 31 min |
| Feb 17, 3:26 PM EST | Snow Squall Warning | BOX | 34 min |
| Feb 17, 3:28 PM EST | Snow Squall Warning | BOX | 32 min |
| Feb 17, 4:00 PM EST | Snow Squall Warning | BOX | 30 min |
| Feb 27, 4:18 AM EST | Wind Advisory | BOX | 51 hr |
| Mar 5, 2:50 AM EST | Flood Watch | BOX | 48 hr |
| Mar 6, 10:37 PM EST | River Flood Warning | BOX | 21 days |
| Mar 8, 3:52 AM EST | Coastal Flood Watch | BOX | 35 hr |
| Mar 9, 3:35 AM EST | Wind Advisory | BOX | 29 hr |
| Mar 9, 3:37 AM EST | Coastal Flood Advisory | BOX | 35 hr |
| Mar 9, 2:53 PM EST | Flood Watch | BOX | 14 hr |
| Mar 10, 3:38 AM EDT | Wind Advisory | BOX | 42 hr |
| Mar 22, 3:52 AM EDT | Flood Watch | BOX | 44 hr |
| Mar 23, 3:44 AM EDT | Coastal Flood Statement | BOX | 18 hr |
| Mar 23, 3:45 AM EDT | Wind Advisory | BOX | 26 hr |
| Mar 23, 7:18 PM EDT | Areal Flood Warning | BOX | 3 hr |
| Mar 24, 5:36 AM EDT | River Flood Warning | BOX | 9 days |
| Mar 27, 3:07 PM EDT | Flood Watch | BOX | 39 hr |
| Apr 2, 12:22 PM EDT | River Flood Watch | BOX | 21 days |
| Apr 2, 2:00 PM EDT | High Wind Watch | BOX | 14 hr |
| Apr 2, 2:14 PM EDT | Coastal Flood Watch | BOX | 25 hr |
| Apr 3, 3:45 AM EDT | High Wind Warning | BOX | 33 hr |
| Apr 3, 3:45 AM EDT | Wind Advisory | BOX | 33 hr |
| Apr 3, 11:53 AM EDT | River Flood Warning | BOX | 5 days |
| Apr 3, 3:06 PM EDT | Coastal Flood Advisory | BOX | 16 hr |
| Apr 11, 2:37 AM EDT | Wind Advisory | BOX | 35 hr |
| Apr 11, 2:51 AM EDT | Coastal Flood Advisory | BOX | 35 hr |
| Apr 21, 1:58 AM EDT | Frost Advisory | BOX | 29 hr |
| Apr 22, 2:57 AM EDT | Frost Advisory | BOX | 28 hr |
| Apr 23, 2:51 PM EDT | Freeze Watch | BOX | 24 hr |
| Apr 24, 3:19 PM EDT | Freeze Warning | BOX | 17 hr |
| Apr 25, 3:06 AM EDT | Freeze Watch | BOX | 11 hr |
| Apr 25, 2:08 PM EDT | Freeze Warning | BOX | 18 hr |
| Apr 26, 2:18 PM EDT | Frost Advisory | BOX | 18 hr |
| May 8, 2:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 8, 4:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| May 8, 4:56 PM EDT | Severe Thunderstorm Warning | BOX | 31 min |
| May 8, 6:40 PM EDT | Severe Thunderstorm Warning | BOX | 50 min |
| May 8, 7:10 PM EDT | Severe Thunderstorm Warning | BOX | 50 min |
| May 8, 7:25 PM EDT | Severe Thunderstorm Warning | BOX | 35 min |
| May 8, 7:51 PM EDT | Severe Thunderstorm Warning | BOX | 39 min |
| May 8, 8:10 PM EDT | Severe Thunderstorm Warning | BOX | 50 min |
| May 8, 9:47 PM EDT | Severe Thunderstorm Warning | BOX | 28 min |
| May 16, 5:35 AM EDT | Special Weather Statement | BOX | 85 min |
| May 16, 6:28 AM EDT | Areal Flood Warning | BOX | 3 hr |
| May 16, 9:08 AM EDT | Areal Flood Warning | BOX | 3 hr |
| May 23, 10:11 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 23, 11:38 AM EDT | Flash Flood Warning | BOX | 4 hr |
| May 27, 1:06 AM EDT | Dense Fog Advisory | BOX | 10 hr |
| Jun 17, 2:19 AM EDT | Heat Advisory | BOX | 49 hr |
| Jun 19, 3:39 AM EDT | Heat Advisory | BOX | 5 days |
| Jun 21, 5:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 23, 7:08 AM EDT | High Surf Advisory | BOX | 36 hr |
| Jun 25, 9:15 PM EDT | Rip Current Statement | BOX | 23 hr |
| Jun 26, 8:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 26, 9:58 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 26, 11:09 PM EDT | Severe Thunderstorm Warning | BOX | 36 min |
| Jun 26, 11:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 26, 11:16 PM EDT | Severe Thunderstorm Warning | BOX | 59 min |
| Jun 26, 11:23 PM EDT | Tornado Warning | BOX | 20 min |
| Jun 30, 9:55 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 11:09 AM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 30, 1:59 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 30, 3:22 PM EDT | Severe Thunderstorm Warning | BOX | 53 min |
| Jul 6, 3:44 AM EDT | Rip Current Statement | BOX | 16 hr |
| Jul 7, 3:39 PM EDT | Heat Advisory | BOX | 4 days |
| Jul 8, 2:56 AM EDT | Dense Fog Advisory | BOX | 8 hr |
| Jul 8, 7:45 PM EDT | Dense Fog Advisory | BOX | 15 hr |
| Jul 10, 3:01 PM EDT | High Surf Advisory | BOX | 29 hr |
| Jul 12, 3:17 AM EDT | Flood Watch | BOX | 36 hr |
| Jul 13, 10:04 AM EDT | Special Weather Statement | BOX | 56 min |
| Jul 13, 3:06 PM EDT | Excessive Heat Watch | BOX | 24 hr |
| Jul 13, 3:06 PM EDT | Heat Advisory | BOX | 4 days |
| Jul 16, 5:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 16, 5:55 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 17, 3:20 AM EDT | Rip Current Statement | BOX | 17 hr |
| Jul 17, 3:39 PM EDT | Rip Current Statement | BOX | 28 hr |
| Jul 17, 7:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 25, 2:15 AM EDT | Dense Fog Advisory | BOX | 6 hr |
| Aug 1, 3:04 AM EDT | Heat Advisory | BOX | 64 hr |
| Aug 3, 5:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 9, 2:06 AM EDT | Rip Current Statement | BOX | 18 hr |
| Aug 9, 2:06 AM EDT | High Surf Advisory | BOX | 42 hr |
| Aug 9, 5:25 AM EDT | Dense Fog Advisory | BOX | 4 hr |
| Aug 10, 12:29 AM EDT | Special Weather Statement | BOX | 91 min |
| Aug 15, 4:03 PM EDT | Severe Thunderstorm Warning | BOX | 27 min |
| Aug 15, 4:12 PM EDT | Severe Thunderstorm Warning | BOX | 48 min |
| Aug 15, 4:44 PM EDT | Severe Thunderstorm Warning | BOX | 61 min |
| Aug 15, 5:06 PM EDT | Severe Thunderstorm Warning | BOX | 39 min |
| Aug 15, 5:18 PM EDT | Flash Flood Warning | BOX | 108 min |
| Aug 19, 3:18 PM EDT | Coastal Flood Statement | BOX | 12 hr |
| Aug 26, 11:51 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Aug 26, 1:04 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 26, 1:39 PM EDT | Severe Thunderstorm Warning | BOX | 36 min |
| Aug 26, 2:15 PM EDT | Severe Thunderstorm Warning | BOX | 45 min |
| Aug 26, 2:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 26, 2:27 PM EDT | Flash Flood Warning | BOX | 92 min |
| Aug 26, 3:14 PM EDT | Severe Thunderstorm Warning | BOX | 33 min |
| Aug 26, 3:43 PM EDT | Flash Flood Warning | BOX | 2 hr |
| Sep 5, 2:56 PM EDT | Rip Current Statement | BOX | 53 hr |
| Sep 14, 5:26 AM EDT | Dense Fog Advisory | BOX | 3 hr |
| Sep 17, 11:11 PM EDT | Dense Fog Advisory | BOX | 11 hr |
| Sep 18, 3:22 PM EDT | Rip Current Statement | BOX | 47 hr |
| Sep 19, 11:38 AM EDT | High Surf Advisory | BOX | 4 days |
| Sep 23, 2:01 PM EDT | Rip Current Statement | BOX | 30 hr |
| Oct 25, 6:56 PM EDT | Red Flag Warning | BOX | 24 hr |
| Oct 31, 3:04 PM EDT | Red Flag Warning | BOX | 28 hr |
| Nov 5, 4:01 PM EST | Red Flag Warning | BOX | 26 hr |
| Nov 7, 2:58 PM EST | Red Flag Warning | BOX | 51 hr |
| Nov 9, 3:03 PM EST | Red Flag Warning | BOX | 27 hr |
| Nov 11, 3:05 PM EST | Red Flag Warning | BOX | 51 hr |
| Nov 14, 3:00 PM EST | Coastal Flood Statement | BOX | 21 hr |
| Nov 14, 3:01 PM EST | Red Flag Warning | BOX | 51 hr |
| Nov 15, 3:22 PM EST | Coastal Flood Statement | BOX | 19 hr |
| Nov 18, 6:29 PM EST | Red Flag Warning | BOX | 24 hr |
| Dec 9, 1:51 PM EST | High Wind Watch | BOX | 25 hr |
| Dec 10, 3:14 AM EST | Flood Watch | BOX | 45 hr |
| Dec 10, 3:08 PM EST | High Wind Warning | BOX | 33 hr |
| Dec 11, 10:04 PM EST | Special Weather Statement | BOX | 56 min |
| Dec 20, 10:08 AM EST | Winter Weather Advisory | BOX | 14 hr |
| Dec 28, 11:28 PM EST | Dense Fog Advisory | BOX | 12 hr |
| Dec 30, 8:43 AM EST | Special Weather Statement | BOX | 62 min |
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 archive20232025
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.