Alert archive / Massachusetts / Essex County

Weather alerts in Essex County, Massachusetts, 2012

160 weather alerts in 2012, 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 2012. Tap one for its archive.

Alerts: 160
Warnings: 39
Watches: 30
Advisories: 64
Busiest month: April23 alerts
Busiest day: July 18, 20129 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

0 of 1 tornado warnings covering Essex County in 2012 had a tornado report inside them.

Essex County, 2012

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	12	10	17%	16	69%	27 min
Flash flood warnings	2	0	100%	0

Each office's whole area, 2012

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Boston/Norton, MA: tornado warnings	5	0	100%	0
NWS Boston/Norton, MA: severe thunderstorm warnings	119	68	43%	244	67%	25 min
NWS Boston/Norton, MA: flash flood warnings	25	14	44%	58	74%	63 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 11, 4:29 AM EST	Wind Advisory	BOX	35 hr
Jan 11, 4:48 AM EST	Winter Weather Advisory	BOX	34 hr
Jan 11, 4:23 PM EST	Coastal Flood Advisory	BOX	23 hr
Jan 12, 5:20 AM EST	Coastal Flood Warning	BOX	10 hr
Jan 12, 7:14 PM EST	Coastal Flood Advisory	BOX	8 hr
Jan 12, 7:34 PM EST	Wind Advisory	BOX	28 hr
Jan 16, 3:53 AM EST	Winter Weather Advisory	BOX	30 hr
Jan 17, 3:54 PM EST	Wind Advisory	BOX	24 hr
Jan 20, 1:15 PM EST	Winter Weather Advisory	BOX	29 hr
Jan 22, 3:56 PM EST	Freezing Rain Advisory	BOX	31 hr
Jan 26, 4:10 AM EST	Winter Weather Advisory	BOX	32 hr
Jan 30, 7:36 AM EST	Special Weather Statement	BOX	54 min
Feb 10, 3:34 PM EST	Winter Weather Advisory	BOX	10 hr
Feb 24, 4:50 AM EST	Wind Advisory	BOX	47 hr
Feb 24, 4:12 PM EST	High Wind Warning	BOX	24 hr
Feb 28, 4:22 AM EST	Winter Storm Watch	BOX	24 hr
Feb 28, 3:44 PM EST	Winter Weather Advisory	BOX	50 hr
Feb 29, 4:24 AM EST	Winter Storm Warning	BOX	38 hr
Mar 2, 3:54 PM EST	Winter Weather Advisory	BOX	18 hr
Mar 7, 4:15 PM EST	Wind Advisory	BOX	35 hr
Mar 13, 10:45 PM EDT	Special Weather Statement	BOX	45 min
Mar 14, 12:43 AM EDT	Severe Thunderstorm Warning	BOX	47 min
Mar 14, 1:24 AM EDT	Special Weather Statement	BOX	51 min
Mar 22, 3:52 PM EDT	Fire Weather Watch	BOX	12 hr
Mar 23, 4:02 AM EDT	Red Flag Warning	BOX	16 hr
Mar 26, 4:06 PM EDT	Fire Weather Watch	BOX	12 hr
Mar 27, 1:50 AM EDT	Red Flag Warning	BOX	17 hr
Apr 2, 4:26 PM EDT	Fire Weather Watch	BOX	12 hr
Apr 3, 4:16 AM EDT	Red Flag Warning	BOX	15 hr
Apr 3, 4:30 PM EDT	Fire Weather Watch	BOX	10 hr
Apr 4, 2:56 AM EDT	Red Flag Warning	BOX	17 hr
Apr 5, 4:05 AM EDT	Red Flag Warning	BOX	15 hr
Apr 5, 3:19 PM EDT	Fire Weather Watch	BOX	12 hr
Apr 8, 2:10 PM EDT	Fire Weather Watch	BOX	2 hr
Apr 8, 4:31 PM EDT	Red Flag Warning	BOX	27 hr
Apr 9, 4:45 PM EDT	Fire Weather Watch	BOX	10 hr
Apr 10, 12:23 PM EDT	Red Flag Warning	BOX	7 hr
Apr 15, 4:02 PM EDT	Fire Weather Watch	BOX	12 hr
Apr 16, 4:15 AM EDT	Red Flag Warning	BOX	16 hr
Apr 16, 3:37 PM EDT	Fire Weather Watch	BOX	13 hr
Apr 17, 4:37 AM EDT	Red Flag Warning	BOX	15 hr
Apr 21, 4:12 PM EDT	Flood Watch	BOX	36 hr
Apr 22, 4:11 PM EDT	Wind Advisory	BOX	18 hr
Apr 25, 3:50 PM EDT	Frost Advisory	BOX	16 hr
Apr 26, 3:38 PM EDT	Freeze Watch	BOX	13 hr
Apr 27, 4:20 AM EDT	Freeze Warning	BOX	30 hr
Apr 28, 3:45 AM EDT	Freeze Watch	BOX	12 hr
Apr 28, 4:13 PM EDT	Freeze Warning	BOX	16 hr
Apr 29, 4:21 AM EDT	Freeze Watch	BOX	12 hr
Apr 29, 3:59 PM EDT	Freeze Warning	BOX	17 hr
May 29, 6:30 AM EDT	Dense Fog Advisory	BOX	4 hr
Jun 1, 3:20 PM EDT	Flood Watch	BOX	22 hr
Jun 1, 4:35 PM EDT	High Surf Advisory	BOX	24 hr
Jun 2, 5:02 AM EDT	Coastal Flood Watch	BOX	38 hr
Jun 2, 5:02 AM EDT	Coastal Flood Advisory	BOX	21 hr
Jun 3, 4:38 AM EDT	Coastal Flood Advisory	BOX	14 hr
Jun 3, 6:33 PM EDT	Coastal Flood Warning	BOX	7 hr
Jun 3, 6:33 PM EDT	Coastal Flood Warning	BOX	33 hr
Jun 4, 4:45 AM EDT	Wind Advisory	BOX	11 hr
Jun 4, 4:50 AM EDT	Coastal Flood Advisory	BOX	9 hr
Jun 5, 3:53 AM EDT	Coastal Flood Advisory	BOX	23 hr
Jun 6, 2:51 AM EDT	Coastal Flood Statement	BOX	25 hr
Jun 7, 1:02 PM EDT	Special Weather Statement	BOX	58 min
Jun 19, 3:58 PM EDT	Heat Advisory	BOX	27 hr
Jun 20, 4:14 PM EDT	Heat Advisory	BOX	27 hr
Jun 22, 6:26 PM EDT	Special Weather Statement	BOX	34 min
Jun 23, 4:23 PM EDT	Special Weather Statement	BOX	52 min
Jun 23, 4:30 PM EDT	Severe Thunderstorm Warning	BOX	35 min
Jun 23, 4:57 PM EDT	Severe Thunderstorm Warning	BOX	33 min
Jun 23, 5:09 PM EDT	Severe Thunderstorm Warning	BOX	36 min
Jun 23, 5:19 PM EDT	Areal Flood Advisory	BOX	4 hr
Jun 25, 9:56 AM EDT	Special Weather Statement	BOX	49 min
Jun 26, 2:42 PM EDT	Special Weather Statement	BOX	33 min
Jul 4, 8:14 PM EDT	Special Weather Statement	BOX	46 min
Jul 4, 8:28 PM EDT	Severe Thunderstorm Warning	BOX	47 min
Jul 17, 3:56 AM EDT	Heat Advisory	BOX	15 hr
Jul 17, 8:23 PM EDT	Special Weather Statement	BOX	67 min
Jul 18, 12:20 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 18, 12:41 PM EDT	Heat Advisory	BOX	6 hr
Jul 18, 12:54 PM EDT	Severe Thunderstorm Warning	BOX	66 min
Jul 18, 1:29 PM EDT	Flash Flood Warning	BOX	98 min
Jul 18, 1:43 PM EDT	Severe Thunderstorm Warning	BOX	36 min
Jul 18, 2:04 PM EDT	Tornado Warning	BOX	12 min
Jul 18, 2:21 PM EDT	Severe Thunderstorm Warning	BOX	39 min
Jul 18, 6:27 PM EDT	Special Weather Statement	BOX	33 min
Jul 24, 12:52 PM EDT	Mesoscale Discussion	SPC	83 min
Jul 24, 1:23 PM EDT	Special Weather Statement	BOX	52 min
Jul 24, 1:38 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 24, 1:56 PM EDT	Special Weather Statement	BOX	79 min
Jul 24, 2:21 PM EDT	Special Weather Statement	BOX	54 min
Jul 26, 11:26 AM EDT	Flash Flood Watch	BOX	11 hr
Jul 28, 4:47 PM EDT	Areal Flood Advisory	BOX	3 hr
Jul 28, 6:42 PM EDT	Areal Flood Advisory	BOX	3 hr
Jul 28, 7:25 PM EDT	Areal Flood Advisory	BOX	3 hr
Aug 1, 4:40 PM EDT	Areal Flood Advisory	BOX	2 hr
Aug 10, 3:31 PM EDT	Tornado Watch	SPC	5 hr
Aug 10, 5:55 PM EDT	Flash Flood Warning	BOX	3 hr
Aug 12, 7:03 PM EDT	Areal Flood Advisory	BOX	39 min
Aug 15, 6:58 AM EDT	Areal Flood Advisory	BOX	113 min
Aug 15, 8:27 AM EDT	Areal Flood Advisory	BOX	93 min
Aug 15, 10:39 PM EDT	Areal Flood Advisory	BOX	3 hr
Aug 15, 11:49 PM EDT	Areal Flood Advisory	BOX	3 hr
Sep 7, 4:39 PM EDT	High Surf Advisory	BOX	4 days
Sep 7, 5:59 PM EDT	Severe Thunderstorm Warning	BOX	46 min
Sep 7, 7:20 PM EDT	Areal Flood Advisory	BOX	100 min
Sep 8, 3:55 PM EDT	Mesoscale Discussion	SPC	65 min
Sep 8, 4:47 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 8, 5:32 PM EDT	Severe Thunderstorm Warning	BOX	36 min
Sep 8, 7:53 PM EDT	Mesoscale Discussion	SPC	97 min
Sep 8, 8:28 PM EDT	Special Weather Statement	BOX	92 min
Sep 17, 3:47 PM EDT	High Wind Watch	BOX	13 hr
Sep 18, 4:37 AM EDT	Wind Advisory	BOX	23 hr
Sep 18, 7:31 PM EDT	High Wind Warning	BOX	10 hr
Sep 18, 7:54 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 18, 10:34 PM EDT	Special Weather Statement	BOX	86 min
Sep 18, 11:09 PM EDT	Mesoscale Discussion	SPC	66 min
Sep 18, 11:16 PM EDT	Severe Thunderstorm Warning	BOX	59 min
Sep 18, 11:27 PM EDT	Areal Flood Advisory	BOX	6 hr
Oct 4, 11:17 PM EDT	Dense Fog Advisory	BOX	10 hr
Oct 11, 4:17 AM EDT	Freeze Watch	BOX	23 hr
Oct 12, 3:37 AM EDT	Freeze Warning	BOX	30 hr
Oct 19, 11:50 PM EDT	Mesoscale Discussion	SPC	115 min
Oct 20, 3:11 AM EDT	Areal Flood Advisory	BOX	3 hr
Oct 27, 4:50 PM EDT	High Wind Watch	BOX	21 hr
Oct 27, 5:34 PM EDT	Coastal Flood Watch	BOX	14 hr
Oct 28, 4:38 AM EDT	High Wind Warning	BOX	44 hr
Oct 28, 4:50 AM EDT	Coastal Flood Warning	BOX	53 hr
Oct 30, 12:33 AM EDT	Wind Advisory	BOX	13 hr
Oct 30, 3:54 AM EDT	Coastal Flood Advisory	BOX	9 hr
Oct 30, 5:51 AM EDT	Mesoscale Discussion	SPC	114 min
Oct 30, 8:02 PM EDT	Areal Flood Advisory	BOX	83 min
Oct 30, 8:19 PM EDT	Severe Thunderstorm Warning	BOX	41 min
Nov 5, 4:20 PM EST	High Wind Watch	BOX	24 hr
Nov 6, 4:37 PM EST	Wind Advisory	BOX	58 hr
Nov 7, 3:16 AM EST	Coastal Flood Advisory	BOX	17 hr
Nov 7, 3:30 AM EST	Winter Weather Advisory	BOX	28 hr
Nov 7, 8:40 PM EST	Coastal Flood Advisory	BOX	11 hr
Nov 13, 4:14 PM EST	Coastal Flood Statement	BOX	21 hr
Nov 14, 3:04 PM EST	Coastal Flood Advisory	BOX	23 hr
Nov 15, 3:54 PM EST	Coastal Flood Advisory	BOX	22 hr
Dec 1, 4:50 AM EST	Winter Weather Advisory	BOX	31 hr
Dec 2, 3:35 AM EST	Winter Weather Advisory	BOX	8 hr
Dec 2, 9:32 AM EST	Dense Fog Advisory	BOX	4 hr
Dec 13, 4:21 AM EST	Coastal Flood Statement	BOX	8 hr
Dec 16, 4:03 AM EST	Coastal Flood Statement	BOX	11 hr
Dec 16, 4:07 AM EST	Winter Weather Advisory	BOX	48 hr
Dec 17, 4:49 AM EST	Coastal Flood Statement	BOX	11 hr
Dec 20, 3:54 AM EST	High Wind Watch	BOX	25 hr
Dec 21, 4:30 AM EST	Wind Advisory	BOX	11 hr
Dec 22, 4:18 AM EST	Wind Advisory	BOX	12 hr
Dec 25, 4:41 AM EST	High Wind Watch	BOX	35 hr
Dec 25, 5:03 AM EST	Winter Storm Watch	BOX	24 hr
Dec 25, 4:36 PM EST	Winter Storm Warning	BOX	46 hr
Dec 26, 5:13 AM EST	Winter Weather Advisory	BOX	24 hr
Dec 26, 3:51 PM EST	Coastal Flood Advisory	BOX	20 hr
Dec 26, 4:10 PM EST	High Wind Warning	BOX	19 hr
Dec 27, 11:38 AM EST	Wind Advisory	BOX	9 hr
Dec 28, 4:43 PM EST	Winter Weather Advisory	BOX	33 hr
Dec 29, 4:25 AM EST	Winter Storm Warning	BOX	21 hr
Dec 29, 4:32 PM EST	Wind Advisory	BOX	34 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	12
Tornado Warning	1
Severe Thunderstorm Watch	4
Tornado Watch	1
Mesoscale Discussion	6
Special Weather Statement	16
Flooding
Flash Flood Warning	2
Flash Flood Watch	1
Flood Watch	2
Areal Flood Advisory	14
Winter
Winter Storm Warning	3
Winter Storm Watch	2
Freezing Rain Advisory	1
Winter Weather Advisory	13
Heat
Heat Advisory	4
Cold
Freeze Warning	4
Freeze Watch	4
Frost Advisory	1
Wind and dust
High Wind Warning	4
High Wind Watch	5
Wind Advisory	14
Fire
Red Flag Warning	9
Fire Weather Watch	9
Fog and smoke
Dense Fog Advisory	3
Coast and beach
Coastal Flood Warning	4
Coastal Flood Watch	2
Coastal Flood Advisory	12
High Surf Advisory	2
Coastal Flood Statement	5

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2011 2013

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.