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

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings201050%633%15 min
Flash flood warnings110%0

Each office's whole area, 2010

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Boston/Norton, MA: tornado warnings6183%1100%5 min
NWS Boston/Norton, MA: severe thunderstorm warnings1379928%42677%22 min
NWS Boston/Norton, MA: flash flood warnings220%1968%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.

IssuedProductOfficeLasted
Dec 31, 11:34 PM ESTWinter Weather AdvisoryBOX3 hr
Jan 1, 4:35 PM ESTWinter Weather AdvisoryBOX44 hr
Jan 2, 4:19 AM ESTWind AdvisoryBOX32 hr
Jan 18, 2:58 AM ESTWind AdvisoryBOX10 hr
Jan 23, 4:22 PM ESTFlash Flood WatchBOX50 hr
Jan 24, 4:20 AM ESTHigh Wind WatchBOX24 hr
Jan 25, 4:08 AM ESTWind AdvisoryBOX14 hr
Jan 25, 9:49 AM ESTHigh Wind WarningBOX12 hr
Jan 25, 12:04 PM ESTCoastal Flood AdvisoryBOX5 hr
Jan 25, 3:37 PM ESTAreal Flood AdvisoryBOX4 hr
Jan 28, 1:45 PM ESTWind AdvisoryBOX29 hr
Feb 8, 3:28 PM ESTWinter Storm WatchBOX37 hr
Feb 9, 3:52 PM ESTWinter Storm WarningBOX33 hr
Feb 10, 12:20 PM ESTMesoscale DiscussionSPC4 hr
Feb 10, 7:03 PM ESTMesoscale DiscussionSPC4 hr
Feb 15, 4:31 AM ESTWinter Storm WatchBOX24 hr
Feb 15, 3:58 PM ESTWinter Weather AdvisoryBOX33 hr
Feb 24, 3:40 PM ESTHigh Wind WatchBOX13 hr
Feb 24, 10:45 PM ESTDense Fog AdvisoryBOX6 hr
Feb 25, 4:34 AM ESTWind AdvisoryBOX21 hr
Feb 25, 11:18 AM ESTCoastal Flood WatchBOX6 hr
Feb 25, 4:53 PM ESTCoastal Flood WarningBOX18 hr
Feb 25, 6:31 PM ESTAreal Flood WarningBOX8 hr
Feb 25, 10:01 PM ESTFlash Flood WatchBOX11 hr
Mar 12, 4:29 PM ESTFlood WatchBOX69 hr
Mar 12, 4:35 PM ESTHigh Wind WatchBOX24 hr
Mar 13, 4:02 AM ESTHigh Wind WarningBOX32 hr
Mar 13, 8:47 PM ESTAreal Flood AdvisoryBOX3 hr
Mar 13, 11:42 PM ESTAreal Flood WarningBOX12 hr
Mar 14, 12:36 PM EDTAreal Flood WarningBOX26 hr
Mar 15, 1:59 PM EDTAreal Flood WarningBOX32 hr
Mar 16, 9:06 PM EDTAreal Flood WarningBOX24 hr
Mar 17, 8:56 PM EDTAreal Flood WarningBOX12 hr
Mar 18, 8:22 AM EDTAreal Flood WarningBOX11 hr
Mar 18, 7:11 PM EDTAreal Flood WarningBOX20 hr
Mar 22, 3:13 AM EDTFlood WatchBOX47 hr
Mar 23, 8:28 PM EDTAreal Flood AdvisoryBOX3 hr
Mar 27, 3:54 PM EDTFlood WatchBOX3 days
Mar 29, 11:49 AM EDTAreal Flood WarningBOX24 hr
Mar 30, 12:15 PM EDTAreal Flood WarningBOX34 hr
Mar 31, 9:44 PM EDTAreal Flood WarningBOX20 hr
Apr 1, 4:54 PM EDTAreal Flood WarningBOX12 hr
Apr 2, 3:40 AM EDTAreal Flood WarningBOX8 hr
Apr 2, 11:21 AM EDTAreal Flood WarningBOX11 hr
Apr 2, 10:48 PM EDTAreal Flood WarningBOX24 hr
Apr 6, 5:18 PM EDTFire Weather WatchBOX11 hr
Apr 7, 4:11 AM EDTRed Flag WarningBOX14 hr
Apr 12, 3:51 AM EDTFrost AdvisoryBOX28 hr
Apr 13, 5:00 AM EDTFrost AdvisoryBOX27 hr
Apr 16, 11:33 PM EDTAreal Flood AdvisoryBOX8 hr
Apr 22, 3:15 PM EDTSevere Thunderstorm WarningBOX42 days
Apr 22, 3:20 PM EDTSevere Thunderstorm WarningBOX55 min
Apr 22, 4:01 PM EDTAreal Flood AdvisoryBOX64 min
Apr 29, 1:43 PM EDTWind AdvisoryBOX5 hr
Apr 30, 7:46 AM EDTRed Flag WarningBOX10 hr
May 3, 3:07 PM EDTWind AdvisoryBOX113 min
May 4, 1:24 PM EDTSevere Thunderstorm WatchSPC6 hr
May 4, 4:44 PM EDTMesoscale DiscussionSPC2 hr
May 4, 4:55 PM EDTSevere Thunderstorm WarningBOX65 min
May 8, 3:29 AM EDTWind AdvisoryBOX37 hr
May 8, 8:56 AM EDTAreal Flood AdvisoryBOX3 hr
May 9, 3:51 AM EDTFrost AdvisoryBOX24 hr
May 9, 3:51 AM EDTFreeze WarningBOX24 hr
May 10, 3:49 AM EDTFrost AdvisoryBOX28 hr
May 10, 3:49 AM EDTFreeze WarningBOX28 hr
May 12, 3:23 PM EDTFrost AdvisoryBOX16 hr
May 26, 9:29 PM EDTSpecial Weather StatementBOX46 min
May 26, 9:33 PM EDTSevere Thunderstorm WarningBOX28 min
May 26, 10:23 PM EDTSevere Thunderstorm WatchSPC4 hr
May 29, 4:52 PM EDTSevere Thunderstorm WarningBOX47 min
Jun 1, 11:46 AM EDTMesoscale DiscussionSPC89 min
Jun 1, 3:25 PM EDTSpecial Weather StatementBOX65 min
Jun 1, 3:37 PM EDTSevere Thunderstorm WarningBOX47 min
Jun 1, 4:08 PM EDTSpecial Weather StatementBOX52 min
Jun 3, 12:07 AM EDTDense Fog AdvisoryBOX11 hr
Jun 3, 1:03 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 3, 3:26 PM EDTMesoscale DiscussionSPC64 min
Jun 3, 6:08 PM EDTSevere Thunderstorm WarningBOX22 min
Jun 3, 7:30 PM EDTMesoscale DiscussionSPC30 min
Jun 3, 8:23 PM EDTSevere Thunderstorm WarningBOX30 min
Jun 5, 7:09 AM EDTSpecial Weather StatementBOX66 min
Jun 5, 7:53 AM EDTSevere Thunderstorm WarningBOX52 min
Jun 5, 8:43 AM EDTAreal Flood AdvisoryBOX77 min
Jun 5, 1:42 PM EDTTornado WatchSPC6 hr
Jun 5, 5:00 PM EDTSevere Thunderstorm WarningBOX21 min
Jun 6, 10:25 AM EDTMesoscale DiscussionSPC65 min
Jun 6, 11:08 AM EDTTornado WatchSPC8 hr
Jun 20, 2:55 PM EDTSevere Thunderstorm WarningBOX50 min
Jun 20, 3:10 PM EDTSpecial Weather StatementBOX50 min
Jun 20, 3:14 PM EDTSevere Thunderstorm WarningBOX34 min
Jun 24, 12:16 PM EDTMesoscale DiscussionSPC89 min
Jun 24, 1:05 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 24, 3:07 PM EDTMesoscale DiscussionSPC53 min
Jun 27, 7:07 PM EDTDense Fog AdvisoryBOX10 hr
Jun 28, 4:57 AM EDTHeat AdvisoryBOX13 hr
Jun 28, 12:49 PM EDTMesoscale DiscussionSPC56 min
Jun 28, 1:45 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 28, 3:53 PM EDTMesoscale DiscussionSPC2 hr
Jun 28, 4:52 PM EDTSevere Thunderstorm WarningBOX38 min
Jun 28, 5:16 PM EDTAreal Flood AdvisoryBOX2 hr
Jun 28, 5:33 PM EDTSpecial Weather StatementBOX57 min
Jun 28, 5:38 PM EDTSevere Thunderstorm WarningBOX31 min
Jun 28, 5:48 PM EDTAreal Flood AdvisoryBOX89 min
Jun 28, 6:06 PM EDTSpecial Weather StatementBOX54 min
Jul 5, 3:53 PM EDTHeat AdvisoryBOX27 hr
Jul 10, 2:03 PM EDTAreal Flood AdvisoryBOX3 hr
Jul 10, 2:37 PM EDTAreal Flood AdvisoryBOX3 hr
Jul 11, 6:14 AM EDTHigh Surf AdvisoryBOX14 hr
Jul 11, 11:38 PM EDTSpecial Weather StatementBOX52 min
Jul 13, 3:03 AM EDTFlash Flood WatchBOX39 hr
Jul 13, 4:52 PM EDTAreal Flood AdvisoryBOX2 hr
Jul 14, 1:53 PM EDTAreal Flood AdvisoryBOX3 hr
Jul 14, 2:43 PM EDTFlash Flood WarningBOX107 min
Jul 14, 4:23 PM EDTAreal Flood AdvisoryBOX55 min
Jul 14, 4:55 PM EDTAreal Flood AdvisoryBOX3 hr
Jul 19, 11:25 AM EDTSevere Thunderstorm WarningBOX47 min
Jul 19, 11:57 AM EDTSpecial Weather StatementBOX63 min
Jul 19, 7:39 PM EDTMesoscale DiscussionSPC96 min
Jul 21, 11:27 AM EDTSevere Thunderstorm WatchSPC9 hr
Jul 21, 12:38 PM EDTMesoscale DiscussionSPC67 min
Jul 21, 3:41 PM EDTMesoscale DiscussionSPC64 min
Jul 21, 5:53 PM EDTSpecial Weather StatementBOX67 min
Jul 23, 8:20 PM EDTSpecial Weather StatementBOX55 min
Jul 24, 3:50 PM EDTSevere Thunderstorm WarningBOX40 min
Jul 24, 4:21 PM EDTAreal Flood AdvisoryBOX57 min
Jul 24, 4:38 PM EDTSpecial Weather StatementBOX67 min
Aug 5, 9:45 AM EDTSevere Thunderstorm WarningBOX45 min
Aug 5, 4:28 PM EDTSevere Thunderstorm WarningBOX34 min
Aug 5, 4:29 PM EDTAreal Flood AdvisoryBOX117 min
Aug 5, 4:44 PM EDTAreal Flood AdvisoryBOX89 min
Aug 5, 6:28 PM EDTAreal Flood AdvisoryBOX26 min
Aug 17, 3:08 AM EDTSevere Thunderstorm WarningBOX37 min
Aug 17, 4:48 AM EDTSpecial Weather StatementBOX57 min
Aug 28, 4:14 PM EDTHigh Surf AdvisoryBOX18 hr
Aug 28, 5:00 PM EDTTropical Storm WatchNHC6 days
Aug 29, 11:00 AM EDTTropical Storm WarningNHC7 days
Aug 30, 5:00 AM EDTHurricane WarningNHC5 days
Sep 1, 5:12 PM EDTHurricane WatchBOX19 hr
Sep 1, 5:12 PM EDTTropical Storm WatchBOX31 hr
Sep 2, 7:01 AM EDTInland Tropical Storm WatchBOX5 hr
Sep 2, 11:59 AM EDTHurricane WarningBOX35 hr
Sep 2, 11:59 AM EDTInland Tropical Storm WarningBOX35 hr
Sep 2, 11:59 AM EDTTropical Storm WarningBOX41 hr
Sep 2, 8:50 PM EDTFlash Flood WatchBOX32 hr
Sep 4, 4:46 AM EDTHigh Surf AdvisoryBOX25 hr
Sep 8, 5:05 PM EDTSpecial Weather StatementBOX25 min
Sep 13, 4:03 PM EDTMesoscale DiscussionSPC87 min
Sep 15, 4:31 PM EDTHigh Wind WatchBOX23 hr
Sep 16, 3:04 PM EDTWind AdvisoryBOX15 hr
Sep 16, 3:12 PM EDTHigh Surf AdvisoryBOX5 days
Sep 24, 7:10 PM EDTDense Fog AdvisoryBOX7 hr
Sep 29, 3:19 AM EDTHigh Surf AdvisoryBOX15 hr
Sep 29, 3:30 AM EDTHigh Wind WatchBOX37 hr
Sep 30, 4:47 AM EDTWind AdvisoryBOX35 hr
Sep 30, 5:09 AM EDTFlood WatchBOX35 hr
Oct 1, 4:44 AM EDTHigh Wind WarningBOX10 hr
Oct 1, 9:07 AM EDTAreal Flood AdvisoryBOX4 hr
Oct 1, 10:56 AM EDTMesoscale DiscussionSPC94 min
Oct 5, 6:11 AM EDTAreal Flood AdvisoryBOX2 hr
Oct 9, 4:08 AM EDTFrost AdvisoryBOX24 hr
Oct 10, 3:55 AM EDTFrost AdvisoryBOX4 hr
Oct 14, 4:14 PM EDTWind AdvisoryBOX48 hr
Oct 16, 4:13 AM EDTWind AdvisoryBOX12 hr
Oct 21, 4:04 AM EDTFrost AdvisoryBOX28 hr
Oct 22, 3:01 PM EDTFrost AdvisoryBOX15 hr
Oct 27, 8:03 PM EDTAreal Flood AdvisoryBOX87 min
Oct 31, 3:13 AM EDTFreeze WarningBOX30 hr
Nov 2, 3:23 AM EDTFreeze WarningBOX30 hr
Nov 5, 5:05 AM EDTCoastal Flood StatementBOX8 hr
Nov 5, 4:16 PM EDTCoastal Flood StatementBOX21 hr
Nov 17, 3:59 AM ESTWind AdvisoryBOX24 hr
Nov 23, 3:12 PM ESTWind AdvisoryBOX27 hr
Nov 30, 3:52 PM ESTWind AdvisoryBOX30 hr
Dec 1, 7:33 PM ESTSpecial Weather StatementBOX57 min
Dec 11, 4:31 PM ESTWind AdvisoryBOX35 hr
Dec 12, 7:22 PM ESTAreal Flood AdvisoryBOX8 hr
Dec 20, 10:05 AM ESTWinter Weather AdvisoryBOX18 hr
Dec 25, 3:58 AM ESTWinter Storm WatchBOX13 hr
Dec 25, 4:51 PM ESTBlizzard WarningBOX43 hr
Dec 25, 5:18 PM ESTHigh Wind WarningBOX50 hr
Dec 26, 12:19 PM ESTCoastal Flood AdvisoryBOX18 hr
Dec 26, 12:31 PM ESTMesoscale DiscussionSPC6 hr
Dec 27, 7:35 PM ESTWind AdvisoryBOX20 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.