Alert archive / Massachusetts / Bristol County
Weather alerts in Bristol County, Massachusetts, 2013
166 weather alerts in 2013, 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 2013. Tap one for its archive.
- Alerts
- 166
- Warnings
- 28
- Watches
- 26
- Advisories
- 72
- Busiest month
- July37 alerts
- Busiest day
- July 20, 20137 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, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 8 | 2 | 75% | 6 | 33% | 10 min |
| Flash flood warnings | 5 | 1 | 80% | 3 | 67% | 47 min |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boston/Norton, MA: tornado warnings | 12 | 0 | 100% | 4 | 0% | |
| NWS Boston/Norton, MA: severe thunderstorm warnings | 91 | 48 | 47% | 169 | 64% | 23 min |
| NWS Boston/Norton, MA: flash flood warnings | 61 | 23 | 62% | 97 | 81% | 66 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 12, 4:56 PM EST | Dense Fog Advisory | BOX | 38 hr |
| Jan 13, 4:14 PM EST | Dense Fog Advisory | BOX | 17 hr |
| Jan 15, 4:05 AM EST | Winter Weather Advisory | BOX | 39 hr |
| Jan 18, 3:40 PM EST | Wind Advisory | BOX | 26 hr |
| Jan 20, 3:57 AM EST | Wind Advisory | BOX | 15 hr |
| Jan 21, 4:11 AM EST | Winter Weather Advisory | BOX | 26 hr |
| Jan 27, 3:59 PM EST | Winter Weather Advisory | BOX | 36 hr |
| Jan 29, 4:26 AM EST | High Wind Watch | BOX | 32 hr |
| Jan 30, 4:53 AM EST | High Wind Warning | BOX | 29 hr |
| Jan 30, 3:15 PM EST | Coastal Flood Statement | BOX | 21 hr |
| Jan 31, 9:19 AM EST | Wind Advisory | BOX | 9 hr |
| Feb 6, 4:18 AM EST | Winter Storm Watch | BOX | 36 hr |
| Feb 6, 3:19 PM EST | Blizzard Watch | BOX | 25 hr |
| Feb 6, 3:36 PM EST | High Wind Watch | BOX | 13 hr |
| Feb 7, 3:55 PM EST | Blizzard Warning | BOX | 47 hr |
| Feb 8, 12:08 PM EST | Coastal Flood Advisory | BOX | 19 hr |
| Feb 8, 12:50 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 8, 4:51 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 8, 8:37 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 9, 4:07 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 9, 8:54 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 10, 4:07 PM EST | Winter Weather Advisory | BOX | 21 hr |
| Feb 11, 4:08 PM EST | Dense Fog Advisory | BOX | 10 hr |
| Feb 16, 3:52 AM EST | Winter Storm Warning | BOX | 36 hr |
| Feb 16, 3:52 AM EST | Winter Weather Advisory | BOX | 33 hr |
| Feb 16, 4:46 PM EST | Wind Advisory | BOX | 30 hr |
| Feb 17, 8:18 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 26, 5:51 PM EST | Coastal Flood Advisory | BOX | 20 hr |
| Mar 5, 3:58 PM EST | Winter Storm Watch | BOX | 24 hr |
| Mar 6, 4:20 PM EST | Winter Storm Warning | BOX | 51 hr |
| Mar 6, 4:20 PM EST | Winter Weather Advisory | BOX | 52 hr |
| Mar 6, 4:25 PM EST | Wind Advisory | BOX | 46 hr |
| Mar 11, 3:17 PM EDT | Flood Watch | BOX | 37 hr |
| Mar 18, 4:53 AM EDT | Winter Weather Advisory | BOX | 30 hr |
| Mar 21, 3:35 PM EDT | Winter Weather Advisory | BOX | 15 hr |
| Mar 21, 11:53 PM EDT | Winter Storm Warning | BOX | 6 hr |
| Apr 6, 4:42 AM EDT | Red Flag Warning | BOX | 12 hr |
| Apr 20, 3:49 PM EDT | Frost Advisory | BOX | 16 hr |
| Apr 21, 1:54 PM EDT | Freeze Warning | BOX | 17 hr |
| May 6, 4:17 PM EDT | Dense Fog Advisory | BOX | 18 hr |
| May 9, 3:52 PM EDT | Areal Flood Advisory | BOX | 53 min |
| May 11, 7:51 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| May 12, 3:53 PM EDT | Freeze Watch | BOX | 12 hr |
| May 13, 3:50 AM EDT | Frost Advisory | BOX | 27 hr |
| May 20, 3:56 PM EDT | Dense Fog Advisory | BOX | 18 hr |
| May 21, 4:27 PM EDT | Special Weather Statement | BOX | 48 min |
| May 23, 9:41 PM EDT | Flash Flood Watch | BOX | 12 hr |
| May 24, 2:21 AM EDT | Special Weather Statement | BOX | 84 min |
| May 24, 6:02 AM EDT | Rip Current Statement | BOX | 11 hr |
| May 29, 10:46 PM EDT | Special Weather Statement | BOX | 59 min |
| May 30, 5:33 PM EDT | Special Weather Statement | BOX | 27 min |
| Jun 3, 3:24 AM EDT | Severe Thunderstorm Warning | BOX | 36 min |
| Jun 3, 3:46 AM EDT | Areal Flood Advisory | BOX | 119 min |
| Jun 3, 4:15 AM EDT | Flash Flood Warning | BOX | 90 min |
| Jun 6, 3:50 PM EDT | Flood Watch | BOX | 41 hr |
| Jun 7, 3:54 AM EDT | Wind Advisory | BOX | 30 hr |
| Jun 7, 4:06 PM EDT | High Surf Advisory | BOX | 50 hr |
| Jun 7, 6:33 PM EDT | Areal Flood Warning | BOX | 4 hr |
| Jun 7, 10:30 PM EDT | Areal Flood Warning | BOX | 6 hr |
| Jun 8, 4:29 AM EDT | Areal Flood Warning | BOX | 2 hr |
| Jun 8, 7:18 PM EDT | Areal Flood Warning | BOX | 3 hr |
| Jun 8, 10:07 PM EDT | Areal Flood Warning | BOX | 6 hr |
| Jun 10, 4:00 AM EDT | Flood Watch | BOX | 40 hr |
| Jun 10, 8:58 PM EDT | Special Weather Statement | BOX | 92 min |
| Jun 10, 10:19 PM EDT | Special Weather Statement | BOX | 41 min |
| Jun 11, 4:07 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 12, 10:47 AM EDT | Flood Watch | BOX | 61 hr |
| Jun 13, 10:43 PM EDT | Flash Flood Warning | BOX | 2 hr |
| Jun 17, 1:14 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 17, 6:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 18, 1:47 PM EDT | Flash Flood Watch | BOX | 7 hr |
| Jun 18, 4:58 PM EDT | Special Weather Statement | BOX | 62 min |
| Jun 25, 5:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jun 26, 3:02 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 4:07 PM EDT | Flash Flood Watch | BOX | 57 hr |
| Jun 26, 4:07 PM EDT | Special Weather Statement | BOX | 38 min |
| Jun 28, 12:47 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 4:50 AM EDT | Rip Current Statement | BOX | 15 hr |
| Jul 3, 7:24 PM EDT | Heat Advisory | BOX | 25 hr |
| Jul 4, 3:55 PM EDT | Heat Advisory | BOX | 27 hr |
| Jul 5, 3:56 PM EDT | Heat Advisory | BOX | 27 hr |
| Jul 7, 9:57 AM EDT | Heat Advisory | BOX | 7 hr |
| Jul 7, 2:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 10, 4:07 AM EDT | Flash Flood Watch | BOX | 38 hr |
| Jul 11, 9:42 AM EDT | Special Weather Statement | BOX | 48 min |
| Jul 11, 9:54 AM EDT | Flash Flood Warning | BOX | 3 hr |
| Jul 11, 10:06 AM EDT | Flash Flood Warning | BOX | 3 hr |
| Jul 12, 2:40 AM EDT | Dense Fog Advisory | BOX | 7 hr |
| Jul 13, 11:19 PM EDT | Dense Fog Advisory | BOX | 10 hr |
| Jul 14, 4:02 PM EDT | Heat Advisory | BOX | 27 hr |
| Jul 14, 7:26 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Jul 14, 7:51 PM EDT | Areal Flood Advisory | BOX | 54 min |
| Jul 15, 4:23 PM EDT | Heat Advisory | BOX | 27 hr |
| Jul 16, 4:10 PM EDT | Heat Advisory | BOX | 27 hr |
| Jul 17, 4:04 AM EDT | Excessive Heat Watch | BOX | 13 hr |
| Jul 17, 4:51 PM EDT | Excessive Heat Warning | BOX | 24 hr |
| Jul 17, 4:51 PM EDT | Heat Advisory | BOX | 26 hr |
| Jul 18, 5:00 PM EDT | Excessive Heat Warning | BOX | 23 hr |
| Jul 18, 5:00 PM EDT | Heat Advisory | BOX | 23 hr |
| Jul 19, 4:24 PM EDT | Heat Advisory | BOX | 25 hr |
| Jul 20, 1:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 20, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 20, 3:30 PM EDT | Severe Thunderstorm Warning | BOX | 60 min |
| Jul 20, 3:41 PM EDT | Severe Thunderstorm Warning | BOX | 49 min |
| Jul 20, 3:50 PM EDT | Severe Thunderstorm Warning | BOX | 40 min |
| Jul 20, 4:13 PM EDT | Severe Thunderstorm Warning | BOX | 47 min |
| Jul 20, 6:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 20, 9:10 PM EDT | Special Weather Statement | BOX | 50 min |
| Jul 20, 9:25 PM EDT | Severe Thunderstorm Warning | BOX | 50 min |
| Jul 23, 4:12 AM EDT | Flash Flood Watch | BOX | 15 hr |
| Jul 23, 2:58 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 23, 5:00 PM EDT | Flash Flood Warning | BOX | 2 hr |
| Jul 23, 5:10 PM EDT | Special Weather Statement | BOX | 50 min |
| Jul 25, 4:22 PM EDT | Flash Flood Watch | BOX | 18 hr |
| Aug 3, 6:54 PM EDT | Areal Flood Advisory | BOX | 66 min |
| Aug 9, 4:11 AM EDT | Flash Flood Watch | BOX | 15 hr |
| Aug 9, 9:43 AM EDT | Special Weather Statement | BOX | 47 min |
| Aug 9, 10:44 AM EDT | Special Weather Statement | BOX | 46 min |
| Aug 9, 11:58 AM EDT | Areal Flood Advisory | BOX | 3 hr |
| Aug 9, 3:01 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Aug 13, 4:11 AM EDT | Dense Fog Advisory | BOX | 5 hr |
| Aug 22, 12:58 PM EDT | Areal Flood Advisory | BOX | 2 hr |
| Aug 22, 1:21 PM EDT | Special Weather Statement | BOX | 39 min |
| Aug 27, 4:49 AM EDT | Areal Flood Advisory | BOX | 116 min |
| Aug 27, 7:51 PM EDT | Dense Fog Advisory | BOX | 14 hr |
| Aug 28, 3:48 PM EDT | Dense Fog Advisory | BOX | 13 hr |
| Sep 1, 4:17 AM EDT | Special Weather Statement | BOX | 43 min |
| Sep 1, 10:03 AM EDT | Areal Flood Advisory | BOX | 117 min |
| Sep 2, 4:21 AM EDT | Flash Flood Watch | BOX | 21 hr |
| Sep 3, 1:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 3, 2:48 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Sep 3, 4:14 PM EDT | Severe Thunderstorm Warning | BOX | 31 min |
| Sep 3, 4:44 PM EDT | Severe Thunderstorm Warning | BOX | 31 min |
| Sep 3, 4:45 PM EDT | Areal Flood Advisory | BOX | 2 hr |
| Sep 3, 5:44 PM EDT | Areal Flood Advisory | BOX | 61 min |
| Sep 10, 4:26 PM EDT | Heat Advisory | BOX | 26 hr |
| Sep 12, 12:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Sep 21, 1:53 AM EDT | Dense Fog Advisory | BOX | 7 hr |
| Sep 22, 6:55 AM EDT | Areal Flood Advisory | BOX | 65 min |
| Sep 29, 5:26 AM EDT | Dense Fog Advisory | BOX | 5 hr |
| Sep 29, 3:57 PM EDT | Dense Fog Advisory | BOX | 14 hr |
| Oct 7, 4:21 AM EDT | Wind Advisory | BOX | 18 hr |
| Oct 7, 2:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 7, 7:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 31, 4:32 AM EDT | High Wind Watch | BOX | 11 hr |
| Oct 31, 3:34 PM EDT | Wind Advisory | BOX | 24 hr |
| Nov 17, 1:09 AM EST | Dense Fog Advisory | BOX | 6 hr |
| Nov 18, 6:29 AM EST | Special Weather Statement | BOX | 61 min |
| Nov 23, 4:45 PM EST | Wind Advisory | BOX | 31 hr |
| Nov 25, 4:22 PM EST | High Wind Watch | BOX | 12 hr |
| Nov 26, 4:28 AM EST | Wind Advisory | BOX | 36 hr |
| Nov 26, 11:38 AM EST | High Wind Warning | BOX | 25 hr |
| Nov 26, 11:45 AM EST | Flood Watch | BOX | 28 hr |
| Nov 27, 4:34 AM EST | Areal Flood Advisory | BOX | 12 hr |
| Nov 27, 4:10 PM EST | Flood Watch | BOX | 110 min |
| Dec 1, 4:17 PM EST | Special Weather Statement | BOX | 43 min |
| Dec 5, 1:25 PM EST | Dense Fog Advisory | BOX | 14 hr |
| Dec 8, 4:25 AM EST | Winter Weather Advisory | BOX | 35 hr |
| Dec 10, 4:34 AM EST | Winter Weather Advisory | BOX | 15 hr |
| Dec 13, 4:27 AM EST | Winter Storm Watch | BOX | 25 hr |
| Dec 14, 5:08 AM EST | Winter Weather Advisory | BOX | 25 hr |
| Dec 14, 5:08 AM EST | Winter Weather Advisory | BOX | 23 hr |
| Dec 14, 8:16 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 15, 9:08 AM EST | Winter Weather Advisory | BOX | 3 hr |
| Dec 16, 4:03 PM EST | Winter Weather Advisory | BOX | 30 hr |
| Dec 29, 4:03 AM EST | Wind Advisory | BOX | 21 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 archive20122014
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.