Alert archive / Massachusetts / Essex County
Weather alerts in Essex County, Massachusetts, 2016
138 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Essex County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 138
- Warnings
- 28
- Watches
- 17
- Advisories
- 63
- Busiest month
- February23 alerts
- Busiest day
- July 23, 20167 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Essex County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 12 | 9 | 25% | 38 | 66% | 19 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 3 min |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boston/Norton, MA: tornado warnings | 2 | 2 | 0% | 4 | 100% | 20 min |
| NWS Boston/Norton, MA: severe thunderstorm warnings | 127 | 86 | 32% | 515 | 66% | 25 min |
| NWS Boston/Norton, MA: flash flood warnings | 8 | 3 | 63% | 35 | 94% | 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 9, 4:17 AM EST | High Wind Watch | BOX | 24 hr |
| Jan 10, 3:50 AM EST | High Wind Warning | BOX | 12 hr |
| Jan 10, 3:50 AM EST | Wind Advisory | BOX | 15 hr |
| Jan 12, 3:35 PM EST | Wind Advisory | BOX | 24 hr |
| Jan 15, 3:19 PM EST | Winter Weather Advisory | BOX | 21 hr |
| Jan 17, 4:26 PM EST | Winter Weather Advisory | BOX | 17 hr |
| Jan 18, 3:57 AM EST | Wind Advisory | BOX | 39 hr |
| Jan 22, 2:58 PM EST | Wind Advisory | BOX | 34 hr |
| Jan 22, 3:36 PM EST | Winter Weather Advisory | BOX | 36 hr |
| Jan 24, 1:54 AM EST | Coastal Flood Advisory | BOX | 12 hr |
| Feb 4, 2:45 PM EST | Winter Storm Warning | BOX | 28 hr |
| Feb 5, 7:44 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 6, 4:21 PM EST | Winter Storm Watch | BOX | 22 hr |
| Feb 7, 2:36 PM EST | Winter Storm Warning | BOX | 28 hr |
| Feb 7, 2:36 PM EST | Winter Weather Advisory | BOX | 33 hr |
| Feb 7, 3:00 PM EST | Coastal Flood Advisory | BOX | 22 hr |
| Feb 8, 6:24 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 8, 12:30 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 8, 8:33 PM EST | Coastal Flood Statement | BOX | 5 hr |
| Feb 9, 11:14 AM EST | Coastal Flood Advisory | BOX | 106 min |
| Feb 11, 4:24 PM EST | Wind Chill Watch | BOX | 24 hr |
| Feb 12, 3:52 AM EST | Wind Chill Warning | BOX | 56 hr |
| Feb 14, 3:07 PM EST | Winter Weather Advisory | BOX | 46 hr |
| Feb 15, 3:54 AM EST | High Wind Watch | BOX | 23 hr |
| Feb 16, 2:46 AM EST | High Wind Warning | BOX | 19 hr |
| Feb 16, 2:46 AM EST | Wind Advisory | BOX | 16 hr |
| Feb 22, 2:41 PM EST | Winter Weather Advisory | BOX | 52 hr |
| Feb 24, 3:02 PM EST | Wind Advisory | BOX | 25 hr |
| Feb 25, 1:22 AM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Feb 25, 2:40 AM EST | Severe Thunderstorm Warning | BOX | 50 min |
| Feb 25, 2:40 AM EST | Mesoscale Discussion | SPC | 95 min |
| Feb 25, 3:01 AM EST | Severe Thunderstorm Warning | BOX | 59 min |
| Feb 25, 3:52 AM EST | Severe Thunderstorm Warning | BOX | 38 min |
| Mar 1, 4:16 PM EST | Wind Advisory | BOX | 17 hr |
| Mar 3, 3:08 PM EST | Winter Weather Advisory | BOX | 30 hr |
| Mar 10, 9:34 PM EST | Special Weather Statement | BOX | 86 min |
| Mar 17, 6:00 AM EDT | Dense Fog Advisory | BOX | 3 hr |
| Mar 18, 3:38 PM EDT | Winter Storm Watch | BOX | 48 hr |
| Mar 20, 3:52 AM EDT | Winter Weather Advisory | BOX | 33 hr |
| Mar 25, 8:45 AM EDT | Freezing Rain Advisory | BOX | 2 hr |
| Mar 28, 4:49 AM EDT | Wind Advisory | BOX | 33 hr |
| Mar 30, 3:46 AM EDT | Wind Advisory | BOX | 41 hr |
| Apr 1, 8:21 PM EDT | Special Weather Statement | BOX | 24 min |
| Apr 2, 3:59 AM EDT | High Wind Watch | BOX | 11 hr |
| Apr 2, 2:51 PM EDT | Winter Weather Advisory | BOX | 19 hr |
| Apr 2, 2:58 PM EDT | High Wind Warning | BOX | 23 hr |
| Apr 3, 2:06 PM EDT | Wind Advisory | BOX | 5 hr |
| Apr 3, 2:53 PM EDT | Winter Weather Advisory | BOX | 30 hr |
| Apr 7, 4:03 AM EDT | Wind Advisory | BOX | 17 hr |
| Apr 8, 4:20 AM EDT | Coastal Flood Watch | BOX | 24 hr |
| Apr 9, 4:40 AM EDT | Coastal Flood Advisory | BOX | 23 hr |
| Apr 15, 3:04 PM EDT | Fire Weather Watch | BOX | 13 hr |
| Apr 16, 4:01 AM EDT | Red Flag Warning | BOX | 14 hr |
| Apr 19, 4:17 PM EDT | Fire Weather Watch | BOX | 11 hr |
| Apr 20, 3:09 AM EDT | Frost Advisory | BOX | 28 hr |
| Apr 20, 3:16 AM EDT | Red Flag Warning | BOX | 15 hr |
| Apr 23, 3:30 AM EDT | Frost Advisory | BOX | 25 hr |
| Apr 26, 4:17 PM EDT | Frost Advisory | BOX | 15 hr |
| Apr 27, 7:24 AM EDT | Frost Advisory | BOX | 20 hr |
| May 5, 4:03 AM EDT | Coastal Flood Advisory | BOX | 21 hr |
| May 6, 4:25 AM EDT | Coastal Flood Advisory | BOX | 22 hr |
| May 7, 3:52 PM EDT | Coastal Flood Statement | BOX | 11 hr |
| May 9, 3:56 AM EDT | Frost Advisory | BOX | 27 hr |
| Jun 3, 8:03 PM EDT | Coastal Flood Statement | BOX | 5 hr |
| Jun 5, 4:38 PM EDT | Coastal Flood Statement | BOX | 9 hr |
| Jun 5, 9:23 PM EDT | Special Weather Statement | BOX | 52 min |
| Jun 7, 11:50 AM EDT | Special Weather Statement | BOX | 25 min |
| Jun 7, 11:58 AM EDT | Severe Thunderstorm Warning | BOX | 27 min |
| Jun 7, 12:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 12:31 PM EDT | Areal Flood Advisory | BOX | 59 min |
| Jun 7, 12:32 PM EDT | Special Weather Statement | BOX | 43 min |
| Jun 7, 12:51 PM EDT | Special Weather Statement | BOX | 39 min |
| Jun 29, 4:59 PM EDT | Special Weather Statement | BOX | 46 min |
| Jul 7, 8:31 PM EDT | Dense Fog Advisory | BOX | 12 hr |
| Jul 18, 12:05 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 18, 3:08 PM EDT | Special Weather Statement | BOX | 37 min |
| Jul 18, 3:17 PM EDT | Severe Thunderstorm Warning | BOX | 28 min |
| Jul 18, 3:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 18, 6:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 23, 4:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 23, 5:46 PM EDT | Severe Thunderstorm Warning | BOX | 44 min |
| Jul 23, 6:04 PM EDT | Severe Thunderstorm Watch | SPC | 2 hr |
| Jul 23, 6:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 23, 6:38 PM EDT | Severe Thunderstorm Warning | BOX | 52 min |
| Jul 23, 7:06 PM EDT | Severe Thunderstorm Warning | BOX | 54 min |
| Jul 23, 7:29 PM EDT | Severe Thunderstorm Warning | BOX | 31 min |
| Aug 6, 2:19 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 6, 3:55 PM EDT | Special Weather Statement | BOX | 35 min |
| Aug 10, 3:13 AM EDT | Heat Advisory | BOX | 40 hr |
| Aug 11, 3:44 PM EDT | Heat Advisory | BOX | 27 hr |
| Aug 12, 2:22 PM EDT | Excessive Heat Warning | BOX | 5 hr |
| Aug 13, 4:09 PM EDT | Heat Advisory | BOX | 27 hr |
| Aug 13, 9:59 PM EDT | Special Weather Statement | BOX | 61 min |
| Aug 22, 3:51 AM EDT | Severe Thunderstorm Warning | BOX | 39 min |
| Aug 22, 4:06 AM EDT | Special Weather Statement | BOX | 39 min |
| Sep 6, 5:06 AM EDT | High Surf Advisory | BOX | 37 hr |
| Sep 8, 3:22 AM EDT | Dense Fog Advisory | BOX | 6 hr |
| Sep 11, 9:23 AM EDT | Severe Thunderstorm Warning | BOX | 52 min |
| Sep 11, 9:53 AM EDT | Severe Thunderstorm Warning | BOX | 54 min |
| Sep 11, 10:01 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 29, 4:42 AM EDT | High Surf Advisory | BOX | 13 hr |
| Oct 1, 6:37 AM EDT | Areal Flood Advisory | BOX | 113 min |
| Oct 10, 3:56 AM EDT | Frost Advisory | BOX | 29 hr |
| Oct 14, 3:43 AM EDT | Frost Advisory | BOX | 29 hr |
| Oct 14, 3:43 AM EDT | Freeze Warning | BOX | 29 hr |
| Oct 18, 3:53 AM EDT | Coastal Flood Statement | BOX | 5 hr |
| Oct 18, 9:16 AM EDT | Coastal Flood Advisory | BOX | 6 hr |
| Oct 19, 10:48 AM EDT | Coastal Flood Statement | BOX | 5 hr |
| Oct 21, 1:11 PM EDT | Coastal Flood Statement | BOX | 6 hr |
| Oct 21, 9:17 PM EDT | Areal Flood Warning | BOX | 3 hr |
| Oct 21, 9:58 PM EDT | Flash Flood Warning | BOX | 2 hr |
| Oct 22, 4:04 AM EDT | Wind Advisory | BOX | 38 hr |
| Oct 24, 3:58 PM EDT | Freeze Watch | BOX | 13 hr |
| Oct 25, 4:39 AM EDT | Freeze Warning | BOX | 28 hr |
| Oct 26, 4:12 PM EDT | Frost Advisory | BOX | 17 hr |
| Oct 27, 4:47 AM EDT | Wind Advisory | BOX | 46 hr |
| Oct 28, 10:06 AM EDT | Wind Advisory | BOX | 13 hr |
| Nov 11, 3:44 AM EST | Wind Advisory | BOX | 18 hr |
| Nov 14, 3:51 PM EST | Coastal Flood Advisory | BOX | 22 hr |
| Nov 15, 4:06 PM EST | Coastal Flood Advisory | BOX | 10 hr |
| Nov 16, 2:18 AM EST | Coastal Flood Advisory | BOX | 12 hr |
| Nov 19, 4:26 PM EST | Wind Advisory | BOX | 50 hr |
| Dec 11, 4:02 AM EST | Winter Weather Advisory | BOX | 31 hr |
| Dec 13, 3:21 PM EST | Coastal Flood Statement | BOX | 22 hr |
| Dec 14, 2:58 PM EST | High Wind Watch | BOX | 13 hr |
| Dec 14, 3:02 PM EST | Wind Chill Watch | BOX | 13 hr |
| Dec 15, 3:49 AM EST | High Wind Warning | BOX | 26 hr |
| Dec 15, 3:58 AM EST | Wind Chill Advisory | BOX | 29 hr |
| Dec 16, 4:12 AM EST | High Wind Warning | BOX | 104 min |
| Dec 16, 4:29 AM EST | Winter Weather Advisory | BOX | 37 hr |
| Dec 18, 3:47 AM EST | Dense Fog Advisory | BOX | 6 hr |
| Dec 26, 3:04 AM EST | Wind Advisory | BOX | 33 hr |
| Dec 27, 3:59 PM EST | Winter Storm Watch | BOX | 24 hr |
| Dec 28, 3:37 PM EST | Winter Weather Advisory | BOX | 31 hr |
| Dec 28, 10:41 PM EST | High Wind Watch | BOX | 6 hr |
| Dec 29, 4:32 AM EST | Wind Advisory | BOX | 20 hr |
| Dec 29, 3:54 PM EST | High Wind Warning | BOX | 8 hr |
| Dec 30, 4:21 AM EST | Wind Advisory | BOX | 11 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 archive20152017
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.