Alert archive / Massachusetts / Nantucket County

Weather alerts in Nantucket County, Massachusetts, 2010

119 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Nantucket County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts: 119
Warnings: 16
Watches: 21
Advisories: 64
Busiest month: January17 alerts
Busiest day: February 25, 20105 alerts

Over time

By month

Warning verification

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

Nantucket County, 2010

	Warnings	With a report	False alarm ratio
Tornado warnings	0
Severe thunderstorm warnings	1	0	100%
Flash flood warnings	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
Jan 1, 3:26 PM EST	Coastal Flood Advisory	BOX	23 hr
Jan 1, 4:35 PM EST	Winter Weather Advisory	BOX	44 hr
Jan 2, 3:57 AM EST	Coastal Flood Watch	BOX	24 hr
Jan 2, 4:19 AM EST	High Wind Watch	BOX	16 hr
Jan 2, 4:19 AM EST	Wind Advisory	BOX	32 hr
Jan 2, 9:42 PM EST	Coastal Flood Advisory	BOX	4 hr
Jan 3, 3:55 AM EST	Coastal Flood Advisory	BOX	10 hr
Jan 17, 3:45 PM EST	Wind Advisory	BOX	11 hr
Jan 17, 9:53 PM EST	High Wind Watch	BOX	5 hr
Jan 18, 2:58 AM EST	High Wind Warning	BOX	13 hr
Jan 18, 4:44 AM EST	Coastal Flood Advisory	BOX	11 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 28, 1:45 PM EST	Wind Advisory	BOX	29 hr
Jan 29, 7:26 PM EST	Wind Advisory	BOX	5 hr
Feb 6, 4:16 AM EST	Wind Advisory	BOX	21 hr
Feb 8, 3:28 PM EST	Winter Storm Watch	BOX	37 hr
Feb 9, 3:56 AM EST	High Wind Watch	BOX	12 hr
Feb 9, 3:52 PM EST	Winter Storm Warning	BOX	33 hr
Feb 9, 4:00 PM EST	High Wind Warning	BOX	35 hr
Feb 10, 4:25 AM EST	Winter Weather Advisory	BOX	20 hr
Feb 10, 12:20 PM EST	Mesoscale Discussion	SPC	4 hr
Feb 11, 3:20 AM EST	Wind Advisory	BOX	6 hr
Feb 16, 3:32 PM EST	Wind Advisory	BOX	9 hr
Feb 24, 10:56 AM EST	Wind Advisory	BOX	3 hr
Feb 24, 3:40 PM EST	High Wind Watch	BOX	13 hr
Feb 25, 4:18 AM EST	Coastal Flood Watch	BOX	7 hr
Feb 25, 4:34 AM EST	High Wind Warning	BOX	21 hr
Feb 25, 11:18 AM EST	Coastal Flood Watch	BOX	6 hr
Feb 25, 11:18 AM EST	Coastal Flood Advisory	BOX	11 hr
Feb 25, 4:53 PM EST	Coastal Flood Warning	BOX	18 hr
Feb 28, 3:00 PM EST	Wind Advisory	BOX	24 hr
Mar 1, 3:47 AM EST	Coastal Flood Advisory	BOX	10 hr
Mar 2, 4:34 PM EST	Coastal Flood Watch	BOX	23 hr
Mar 3, 3:49 AM EST	Wind Advisory	BOX	28 hr
Mar 3, 2:31 PM EST	Winter Weather Advisory	BOX	13 hr
Mar 3, 3:35 PM EST	Coastal Flood Warning	BOX	12 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, 4:02 AM EST	Wind Advisory	BOX	30 hr
Mar 13, 5:17 AM EST	Coastal Flood Watch	BOX	33 hr
Mar 13, 4:06 PM EST	Coastal Flood Statement	BOX	22 hr
Mar 13, 8:47 PM EST	Areal Flood Advisory	BOX	3 hr
Mar 14, 3:37 PM EDT	Wind Advisory	BOX	37 hr
Mar 14, 3:42 PM EDT	Coastal Flood Advisory	BOX	34 hr
Mar 26, 4:40 AM EDT	Wind Advisory	BOX	15 hr
Mar 29, 4:24 PM EDT	Coastal Flood Advisory	BOX	22 hr
Mar 30, 10:01 AM EDT	Wind Advisory	BOX	8 hr
Mar 30, 3:45 PM EDT	Coastal Flood Advisory	BOX	10 hr
Apr 12, 3:51 AM EDT	Frost Advisory	BOX	28 hr
Apr 13, 5:00 AM EDT	Frost Advisory	BOX	27 hr
Apr 29, 1:43 PM EDT	Wind Advisory	BOX	5 hr
May 8, 3:29 AM EDT	Wind Advisory	BOX	37 hr
Jun 3, 12:07 AM EDT	Dense Fog Advisory	BOX	11 hr
Jun 5, 9:34 AM EDT	Special Weather Statement	BOX	86 min
Jun 20, 8:37 PM EDT	Dense Fog Advisory	BOX	4 hr
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, 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
Jul 8, 3:24 AM EDT	Dense Fog Advisory	BOX	3 hr
Jul 11, 6:14 AM EDT	High Surf Advisory	BOX	14 hr
Jul 24, 10:48 PM EDT	Dense Fog Advisory	BOX	6 hr
Aug 5, 11:48 AM EDT	Special Weather Statement	BOX	57 min
Aug 5, 12:44 PM EDT	Severe Thunderstorm Warning	BOX	31 min
Aug 5, 1:14 PM EDT	Special Weather Statement	BOX	31 min
Aug 23, 9:09 AM EDT	Wind Advisory	BOX	14 hr
Aug 23, 4:18 PM EDT	High Surf Advisory	BOX	50 hr
Aug 28, 4:14 PM EDT	High Surf Advisory	BOX	18 hr
Aug 28, 11:00 PM EDT	Hurricane Watch	NHC	5 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 2, 11:59 AM EDT	Hurricane 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 15, 4:31 PM EDT	High Wind Watch	BOX	23 hr
Sep 16, 4:32 AM EDT	High Wind Warning	BOX	11 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 17, 12:52 AM EDT	Mesoscale Discussion	SPC	83 min
Sep 17, 4:10 AM EDT	Special Weather Statement	BOX	50 min
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
Oct 1, 10:56 AM EDT	Mesoscale Discussion	SPC	94 min
Oct 14, 4:14 PM EDT	Wind Advisory	BOX	48 hr
Oct 27, 8:03 PM EDT	Areal Flood Advisory	BOX	87 min
Nov 4, 10:01 AM EDT	Wind Advisory	BOX	9 hr
Nov 4, 7:01 PM EDT	Coastal Flood Statement	BOX	6 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 6, 4:19 PM EDT	Coastal Flood Statement	BOX	22 hr
Nov 7, 3:59 PM EST	Coastal Flood Statement	BOX	14 hr
Nov 7, 4:04 PM EST	Wind Advisory	BOX	13 hr
Nov 8, 2:55 PM EST	Wind Advisory	BOX	3 days
Nov 10, 3:54 AM EST	Coastal Flood Advisory	BOX	12 hr
Nov 11, 4:40 AM EST	Coastal Flood Statement	BOX	12 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 11, 4:31 PM EST	Wind Advisory	BOX	35 hr
Dec 20, 10:05 AM EST	Winter Weather Advisory	BOX	18 hr
Dec 20, 1:58 PM EST	Winter Storm Warning	BOX	14 hr
Dec 21, 10:03 AM EST	Wind Advisory	BOX	8 hr
Dec 22, 3:21 PM EST	Coastal Flood Advisory	BOX	23 hr
Dec 25, 5:10 PM EST	Coastal Flood Watch	BOX	19 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, 1:30 PM EST	Winter Weather Advisory	BOX	12 hr
Dec 27, 7:54 AM EST	Coastal Flood Advisory	BOX	10 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.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	1
Severe Thunderstorm Watch	2
Mesoscale Discussion	7
Special Weather Statement	4
Flooding
Flash Flood Watch	2
Areal Flood Advisory	2
Winter
Winter Storm Warning	2
Winter Storm Watch	1
Winter Weather Advisory	5
Cold
Frost Advisory	2
Wind and dust
High Wind Warning	7
High Wind Watch	8
Wind Advisory	30
Fog and smoke
Dense Fog Advisory	6
Tropical
Hurricane Warning	2
Tropical Storm Warning	2
Hurricane Watch	2
Coast and beach
Coastal Flood Warning	2
Coastal Flood Watch	6
Coastal Flood Advisory	13
High Surf Advisory	6
Coastal Flood Statement	7

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2009 2011

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.