Alert archive / Massachusetts / Bristol County
Weather alerts in Bristol County, Massachusetts, 2010
183 weather alerts in 2010, 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 2010. Tap one for its archive.
- Alerts
- 183
- Warnings
- 53
- Watches
- 30
- Advisories
- 66
- Busiest month
- June34 alerts
- Busiest day
- June 28, 201010 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, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 20 | 10 | 50% | 6 | 33% | 15 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boston/Norton, MA: tornado warnings | 6 | 1 | 83% | 1 | 100% | 5 min |
| NWS Boston/Norton, MA: severe thunderstorm warnings | 137 | 99 | 28% | 426 | 77% | 22 min |
| NWS Boston/Norton, MA: flash flood warnings | 2 | 2 | 0% | 19 | 68% | 29 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 |
|---|---|---|---|
| Dec 31, 11:34 PM EST | Winter Weather Advisory | BOX | 3 hr |
| Jan 1, 4:35 PM EST | Winter Weather Advisory | BOX | 44 hr |
| Jan 2, 4:19 AM EST | Wind Advisory | BOX | 32 hr |
| Jan 18, 2:58 AM EST | Wind Advisory | BOX | 10 hr |
| Jan 23, 4:22 PM EST | Flash Flood Watch | BOX | 50 hr |
| Jan 24, 4:20 AM EST | High Wind Watch | BOX | 24 hr |
| Jan 25, 4:08 AM EST | Wind Advisory | BOX | 14 hr |
| Jan 25, 9:49 AM EST | High Wind Warning | BOX | 12 hr |
| Jan 25, 12:04 PM EST | Coastal Flood Advisory | BOX | 5 hr |
| Jan 25, 3:37 PM EST | Areal Flood Advisory | BOX | 4 hr |
| Jan 28, 1:45 PM EST | Wind Advisory | BOX | 29 hr |
| Feb 8, 3:28 PM EST | Winter Storm Watch | BOX | 37 hr |
| Feb 9, 3:52 PM EST | Winter Storm Warning | BOX | 33 hr |
| Feb 10, 12:20 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 10, 7:03 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 15, 4:31 AM EST | Winter Storm Watch | BOX | 24 hr |
| Feb 15, 3:58 PM EST | Winter Weather Advisory | BOX | 33 hr |
| Feb 24, 3:40 PM EST | High Wind Watch | BOX | 13 hr |
| Feb 24, 10:45 PM EST | Dense Fog Advisory | BOX | 6 hr |
| Feb 25, 4:34 AM EST | Wind Advisory | BOX | 21 hr |
| Feb 25, 11:18 AM EST | Coastal Flood Watch | BOX | 6 hr |
| Feb 25, 4:53 PM EST | Coastal Flood Warning | BOX | 18 hr |
| Feb 25, 6:31 PM EST | Areal Flood Warning | BOX | 8 hr |
| Feb 25, 10:01 PM EST | Flash Flood Watch | BOX | 11 hr |
| Mar 12, 4:29 PM EST | Flood Watch | BOX | 69 hr |
| Mar 12, 4:35 PM EST | High Wind Watch | BOX | 24 hr |
| Mar 13, 4:02 AM EST | High Wind Warning | BOX | 32 hr |
| Mar 13, 8:47 PM EST | Areal Flood Advisory | BOX | 3 hr |
| Mar 13, 11:42 PM EST | Areal Flood Warning | BOX | 12 hr |
| Mar 14, 12:36 PM EDT | Areal Flood Warning | BOX | 26 hr |
| Mar 15, 1:59 PM EDT | Areal Flood Warning | BOX | 32 hr |
| Mar 16, 9:06 PM EDT | Areal Flood Warning | BOX | 24 hr |
| Mar 17, 8:56 PM EDT | Areal Flood Warning | BOX | 12 hr |
| Mar 18, 8:22 AM EDT | Areal Flood Warning | BOX | 11 hr |
| Mar 18, 7:11 PM EDT | Areal Flood Warning | BOX | 20 hr |
| Mar 22, 3:13 AM EDT | Flood Watch | BOX | 47 hr |
| Mar 23, 8:28 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Mar 27, 3:54 PM EDT | Flood Watch | BOX | 3 days |
| Mar 29, 11:49 AM EDT | Areal Flood Warning | BOX | 24 hr |
| Mar 30, 12:15 PM EDT | Areal Flood Warning | BOX | 34 hr |
| Mar 31, 9:44 PM EDT | Areal Flood Warning | BOX | 20 hr |
| Apr 1, 4:54 PM EDT | Areal Flood Warning | BOX | 12 hr |
| Apr 2, 3:40 AM EDT | Areal Flood Warning | BOX | 8 hr |
| Apr 2, 11:21 AM EDT | Areal Flood Warning | BOX | 11 hr |
| Apr 2, 10:48 PM EDT | Areal Flood Warning | BOX | 24 hr |
| Apr 6, 5:18 PM EDT | Fire Weather Watch | BOX | 11 hr |
| Apr 7, 4:11 AM EDT | Red Flag Warning | BOX | 14 hr |
| Apr 12, 3:51 AM EDT | Frost Advisory | BOX | 28 hr |
| Apr 13, 5:00 AM EDT | Frost Advisory | BOX | 27 hr |
| Apr 16, 11:33 PM EDT | Areal Flood Advisory | BOX | 8 hr |
| Apr 22, 3:15 PM EDT | Severe Thunderstorm Warning | BOX | 42 days |
| Apr 22, 3:20 PM EDT | Severe Thunderstorm Warning | BOX | 55 min |
| Apr 22, 4:01 PM EDT | Areal Flood Advisory | BOX | 64 min |
| Apr 29, 1:43 PM EDT | Wind Advisory | BOX | 5 hr |
| Apr 30, 7:46 AM EDT | Red Flag Warning | BOX | 10 hr |
| May 3, 3:07 PM EDT | Wind Advisory | BOX | 113 min |
| May 4, 1:24 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 4, 4:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 4, 4:55 PM EDT | Severe Thunderstorm Warning | BOX | 65 min |
| May 8, 3:29 AM EDT | Wind Advisory | BOX | 37 hr |
| May 8, 8:56 AM EDT | Areal Flood Advisory | BOX | 3 hr |
| May 9, 3:51 AM EDT | Frost Advisory | BOX | 24 hr |
| May 9, 3:51 AM EDT | Freeze Warning | BOX | 24 hr |
| May 10, 3:49 AM EDT | Frost Advisory | BOX | 28 hr |
| May 10, 3:49 AM EDT | Freeze Warning | BOX | 28 hr |
| May 12, 3:23 PM EDT | Frost Advisory | BOX | 16 hr |
| May 26, 9:29 PM EDT | Special Weather Statement | BOX | 46 min |
| May 26, 9:33 PM EDT | Severe Thunderstorm Warning | BOX | 28 min |
| May 26, 10:23 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 29, 4:52 PM EDT | Severe Thunderstorm Warning | BOX | 47 min |
| Jun 1, 11:46 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 1, 3:25 PM EDT | Special Weather Statement | BOX | 65 min |
| Jun 1, 3:37 PM EDT | Severe Thunderstorm Warning | BOX | 47 min |
| Jun 1, 4:08 PM EDT | Special Weather Statement | BOX | 52 min |
| Jun 3, 12:07 AM EDT | Dense Fog Advisory | BOX | 11 hr |
| Jun 3, 1:03 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 3, 3:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 3, 6:08 PM EDT | Severe Thunderstorm Warning | BOX | 22 min |
| Jun 3, 7:30 PM EDT | Mesoscale Discussion | SPC | 30 min |
| Jun 3, 8:23 PM EDT | Severe Thunderstorm Warning | BOX | 30 min |
| Jun 5, 7:09 AM EDT | Special Weather Statement | BOX | 66 min |
| Jun 5, 7:53 AM EDT | Severe Thunderstorm Warning | BOX | 52 min |
| Jun 5, 8:43 AM EDT | Areal Flood Advisory | BOX | 77 min |
| Jun 5, 1:42 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 5, 5:00 PM EDT | Severe Thunderstorm Warning | BOX | 21 min |
| Jun 6, 10:25 AM EDT | Mesoscale Discussion | SPC | 65 min |
| Jun 6, 11:08 AM EDT | Tornado Watch | SPC | 8 hr |
| Jun 20, 2:55 PM EDT | Severe Thunderstorm Warning | BOX | 50 min |
| Jun 20, 3:10 PM EDT | Special Weather Statement | BOX | 50 min |
| Jun 20, 3:14 PM EDT | Severe Thunderstorm Warning | BOX | 34 min |
| Jun 24, 12:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 24, 1:05 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 3:07 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 27, 7:07 PM EDT | Dense Fog Advisory | BOX | 10 hr |
| Jun 28, 4:57 AM EDT | Heat Advisory | BOX | 13 hr |
| Jun 28, 12:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 28, 1:45 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 28, 3:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 4:52 PM EDT | Severe Thunderstorm Warning | BOX | 38 min |
| Jun 28, 5:16 PM EDT | Areal Flood Advisory | BOX | 2 hr |
| Jun 28, 5:33 PM EDT | Special Weather Statement | BOX | 57 min |
| Jun 28, 5:38 PM EDT | Severe Thunderstorm Warning | BOX | 31 min |
| Jun 28, 5:48 PM EDT | Areal Flood Advisory | BOX | 89 min |
| Jun 28, 6:06 PM EDT | Special Weather Statement | BOX | 54 min |
| Jul 5, 3:53 PM EDT | Heat Advisory | BOX | 27 hr |
| Jul 10, 2:03 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Jul 10, 2:37 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Jul 11, 6:14 AM EDT | High Surf Advisory | BOX | 14 hr |
| Jul 11, 11:38 PM EDT | Special Weather Statement | BOX | 52 min |
| Jul 13, 3:03 AM EDT | Flash Flood Watch | BOX | 39 hr |
| Jul 13, 4:52 PM EDT | Areal Flood Advisory | BOX | 2 hr |
| Jul 14, 1:53 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Jul 14, 2:43 PM EDT | Flash Flood Warning | BOX | 107 min |
| Jul 14, 4:23 PM EDT | Areal Flood Advisory | BOX | 55 min |
| Jul 14, 4:55 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Jul 19, 11:25 AM EDT | Severe Thunderstorm Warning | BOX | 47 min |
| Jul 19, 11:57 AM EDT | Special Weather Statement | BOX | 63 min |
| Jul 19, 7:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 21, 11:27 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 21, 12:38 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 21, 3:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 21, 5:53 PM EDT | Special Weather Statement | BOX | 67 min |
| Jul 23, 8:20 PM EDT | Special Weather Statement | BOX | 55 min |
| Jul 24, 3:50 PM EDT | Severe Thunderstorm Warning | BOX | 40 min |
| Jul 24, 4:21 PM EDT | Areal Flood Advisory | BOX | 57 min |
| Jul 24, 4:38 PM EDT | Special Weather Statement | BOX | 67 min |
| Aug 5, 9:45 AM EDT | Severe Thunderstorm Warning | BOX | 45 min |
| Aug 5, 4:28 PM EDT | Severe Thunderstorm Warning | BOX | 34 min |
| Aug 5, 4:29 PM EDT | Areal Flood Advisory | BOX | 117 min |
| Aug 5, 4:44 PM EDT | Areal Flood Advisory | BOX | 89 min |
| Aug 5, 6:28 PM EDT | Areal Flood Advisory | BOX | 26 min |
| Aug 17, 3:08 AM EDT | Severe Thunderstorm Warning | BOX | 37 min |
| Aug 17, 4:48 AM EDT | Special Weather Statement | BOX | 57 min |
| Aug 28, 4:14 PM EDT | High Surf Advisory | BOX | 18 hr |
| Aug 28, 5:00 PM EDT | Tropical Storm Watch | NHC | 6 days |
| Aug 29, 11:00 AM EDT | Tropical Storm Warning | NHC | 7 days |
| Aug 30, 5:00 AM EDT | Hurricane Warning | NHC | 5 days |
| Sep 1, 5:12 PM EDT | Hurricane Watch | BOX | 19 hr |
| Sep 1, 5:12 PM EDT | Tropical Storm Watch | BOX | 31 hr |
| Sep 2, 7:01 AM EDT | Inland Tropical Storm Watch | BOX | 5 hr |
| Sep 2, 11:59 AM EDT | Hurricane Warning | BOX | 35 hr |
| Sep 2, 11:59 AM EDT | Inland Tropical Storm Warning | BOX | 35 hr |
| Sep 2, 11:59 AM EDT | Tropical Storm Warning | BOX | 41 hr |
| Sep 2, 8:50 PM EDT | Flash Flood Watch | BOX | 32 hr |
| Sep 4, 4:46 AM EDT | High Surf Advisory | BOX | 25 hr |
| Sep 8, 5:05 PM EDT | Special Weather Statement | BOX | 25 min |
| Sep 13, 4:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Sep 15, 4:31 PM EDT | High Wind Watch | BOX | 23 hr |
| Sep 16, 3:04 PM EDT | Wind Advisory | BOX | 15 hr |
| Sep 16, 3:12 PM EDT | High Surf Advisory | BOX | 5 days |
| Sep 24, 7:10 PM EDT | Dense Fog Advisory | BOX | 7 hr |
| Sep 29, 3:19 AM EDT | High Surf Advisory | BOX | 15 hr |
| Sep 29, 3:30 AM EDT | High Wind Watch | BOX | 37 hr |
| Sep 30, 4:47 AM EDT | Wind Advisory | BOX | 35 hr |
| Sep 30, 5:09 AM EDT | Flood Watch | BOX | 35 hr |
| Oct 1, 4:44 AM EDT | High Wind Warning | BOX | 10 hr |
| Oct 1, 9:07 AM EDT | Areal Flood Advisory | BOX | 4 hr |
| Oct 1, 10:56 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Oct 5, 6:11 AM EDT | Areal Flood Advisory | BOX | 2 hr |
| Oct 9, 4:08 AM EDT | Frost Advisory | BOX | 24 hr |
| Oct 10, 3:55 AM EDT | Frost Advisory | BOX | 4 hr |
| Oct 14, 4:14 PM EDT | Wind Advisory | BOX | 48 hr |
| Oct 16, 4:13 AM EDT | Wind Advisory | BOX | 12 hr |
| Oct 21, 4:04 AM EDT | Frost Advisory | BOX | 28 hr |
| Oct 22, 3:01 PM EDT | Frost Advisory | BOX | 15 hr |
| Oct 27, 8:03 PM EDT | Areal Flood Advisory | BOX | 87 min |
| Oct 31, 3:13 AM EDT | Freeze Warning | BOX | 30 hr |
| Nov 2, 3:23 AM EDT | Freeze Warning | BOX | 30 hr |
| Nov 5, 5:05 AM EDT | Coastal Flood Statement | BOX | 8 hr |
| Nov 5, 4:16 PM EDT | Coastal Flood Statement | BOX | 21 hr |
| Nov 17, 3:59 AM EST | Wind Advisory | BOX | 24 hr |
| Nov 23, 3:12 PM EST | Wind Advisory | BOX | 27 hr |
| Nov 30, 3:52 PM EST | Wind Advisory | BOX | 30 hr |
| Dec 1, 7:33 PM EST | Special Weather Statement | BOX | 57 min |
| Dec 11, 4:31 PM EST | Wind Advisory | BOX | 35 hr |
| Dec 12, 7:22 PM EST | Areal Flood Advisory | BOX | 8 hr |
| Dec 20, 10:05 AM EST | Winter Weather Advisory | BOX | 18 hr |
| Dec 25, 3:58 AM EST | Winter Storm Watch | BOX | 13 hr |
| Dec 25, 4:51 PM EST | Blizzard Warning | BOX | 43 hr |
| Dec 25, 5:18 PM EST | High Wind Warning | BOX | 50 hr |
| Dec 26, 12:19 PM EST | Coastal Flood Advisory | BOX | 18 hr |
| Dec 26, 12:31 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 27, 7:35 PM EST | Wind Advisory | BOX | 20 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 archive20092011
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.