Alert archive / Massachusetts / Suffolk County

Weather alerts in Suffolk County, Massachusetts, 2019

127 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Suffolk County and its neighbors

Each county as a circle sized by its count in 2019. Tap one for its archive.

Alerts
127
Warnings
27
Watches
18
Advisories
42
Busiest month
July24 alerts
Busiest day
July 17, 201910 alerts

Over time

By month

Warning verification

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

Suffolk County, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings11109%1377%22 min
Flash flood warnings20100%0

Each office's whole area, 2019

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Boston/Norton, MA: tornado warnings13285%786%23 min
NWS Boston/Norton, MA: severe thunderstorm warnings1206843%33663%23 min
NWS Boston/Norton, MA: flash flood warnings12192%1100%47 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
Jan 9, 4:17 AM ESTDense Fog AdvisoryBOX3 hr
Jan 9, 4:17 AM ESTWind AdvisoryBOX12 hr
Jan 17, 4:10 AM ESTWinter Storm WatchBOX48 hr
Jan 17, 1:53 PM ESTCoastal Flood WatchBOX25 hr
Jan 18, 3:02 PM ESTCoastal Flood WarningBOX25 hr
Jan 18, 3:02 PM ESTCoastal Flood AdvisoryBOX45 hr
Jan 19, 4:29 AM ESTWinter Weather AdvisoryBOX39 hr
Jan 20, 4:20 AM ESTWind Chill AdvisoryBOX54 hr
Jan 20, 1:01 PM ESTMesoscale DiscussionSPC4 hr
Jan 20, 3:20 PM ESTCoastal Flood StatementBOX21 hr
Jan 23, 3:50 AM ESTFlash Flood WatchBOX39 hr
Jan 23, 3:08 PM ESTWind AdvisoryBOX26 hr
Jan 24, 12:58 PM ESTAreal Flood AdvisoryBOX4 hr
Jan 24, 3:27 PM ESTAreal Flood WarningBOX6 hr
Jan 30, 3:21 AM ESTWind AdvisoryBOX18 hr
Jan 30, 3:29 AM ESTWind Chill AdvisoryBOX30 hr
Jan 30, 6:36 PM ESTSnow Squall WarningBOX39 min
Jan 30, 7:10 PM ESTSnow Squall WarningBOX50 min
Feb 5, 3:16 PM ESTWinter Weather AdvisoryBOX36 hr
Feb 8, 3:29 AM ESTWind AdvisoryBOX35 hr
Feb 10, 3:49 PM ESTWinter Storm WatchBOX35 hr
Feb 11, 4:01 AM ESTWinter Weather AdvisoryBOX51 hr
Feb 13, 8:59 PM ESTSnow Squall WarningBOX46 min
Feb 17, 3:48 AM ESTWinter Weather AdvisoryBOX35 hr
Feb 19, 3:38 PM ESTWinter Weather AdvisoryBOX39 hr
Feb 20, 4:01 PM ESTCoastal Flood StatementBOX23 hr
Feb 20, 10:15 PM ESTMesoscale DiscussionSPC5 hr
Feb 23, 3:37 AM ESTHigh Wind WatchBOX25 hr
Feb 24, 4:07 AM ESTHigh Wind WarningBOX39 hr
Feb 25, 7:01 PM ESTWind AdvisoryBOX20 hr
Feb 26, 3:34 PM ESTWinter Weather AdvisoryBOX42 hr
Mar 1, 3:15 AM ESTWinter Weather AdvisoryBOX34 hr
Mar 2, 4:09 AM ESTWinter Storm WatchBOX23 hr
Mar 3, 3:18 AM ESTWinter Storm WarningBOX31 hr
Mar 4, 3:16 AM ESTMesoscale DiscussionSPC4 hr
Mar 15, 11:24 AM EDTSpecial Weather StatementBOX66 min
Mar 21, 2:37 PM EDTCoastal Flood AdvisoryBOX24 hr
Apr 2, 2:54 PM EDTWind AdvisoryBOX30 hr
Apr 3, 2:59 PM EDTFire Weather WatchBOX13 hr
Apr 4, 4:12 AM EDTRed Flag WarningBOX15 hr
Apr 14, 3:00 AM EDTWind AdvisoryBOX49 hr
Apr 15, 6:25 AM EDTAreal Flood AdvisoryBOX110 min
Apr 19, 1:48 PM EDTWind AdvisoryBOX6 hr
Apr 22, 5:10 PM EDTAreal Flood AdvisoryBOX2 hr
May 13, 4:36 PM EDTCoastal Flood StatementBOX17 hr
May 20, 1:01 PM EDTMesoscale DiscussionSPC119 min
May 20, 5:16 PM EDTMesoscale DiscussionSPC119 min
May 20, 6:19 PM EDTSpecial Weather StatementBOX26 min
Jun 1, 11:12 PM EDTDense Fog AdvisoryBOX9 hr
Jun 21, 4:47 AM EDTSpecial Weather StatementBOX43 min
Jun 29, 6:22 AM EDTSpecial Weather StatementBOX38 min
Jun 29, 3:17 PM EDTSevere Thunderstorm WarningBOX58 min
Jun 29, 4:08 PM EDTSevere Thunderstorm WarningBOX52 min
Jun 29, 4:24 PM EDTAreal Flood WarningBOX55 min
Jun 30, 2:29 PM EDTSpecial Weather StatementBOX46 min
Jun 30, 2:37 PM EDTSevere Thunderstorm WarningBOX53 min
Jul 6, 3:39 AM EDTHeat AdvisoryBOX13 hr
Jul 6, 1:48 PM EDTMesoscale DiscussionSPC2 hr
Jul 6, 5:36 PM EDTSpecial Weather StatementBOX84 min
Jul 6, 5:59 PM EDTAreal Flood WarningBOX2 hr
Jul 12, 3:46 AM EDTSpecial Weather StatementBOX59 min
Jul 17, 1:03 PM EDTMesoscale DiscussionSPC2 hr
Jul 17, 1:24 PM EDTFlash Flood WatchBOX7 hr
Jul 17, 1:58 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 17, 3:53 PM EDTSevere Thunderstorm WarningBOX67 min
Jul 17, 3:59 PM EDTSevere Thunderstorm WarningBOX61 min
Jul 17, 3:59 PM EDTMesoscale DiscussionSPC2 hr
Jul 17, 4:03 PM EDTFlash Flood WarningBOX117 min
Jul 17, 5:19 PM EDTSevere Thunderstorm WarningBOX41 min
Jul 17, 5:38 PM EDTSevere Thunderstorm WarningBOX27 min
Jul 17, 5:43 PM EDTFlash Flood WarningBOX2 hr
Jul 18, 4:01 AM EDTExcessive Heat WatchBOX12 hr
Jul 18, 3:47 PM EDTExcessive Heat WarningBOX3 days
Jul 28, 4:00 PM EDTHeat AdvisoryBOX3 days
Jul 31, 12:39 PM EDTMesoscale DiscussionSPC66 min
Jul 31, 1:17 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 31, 3:20 PM EDTSpecial Weather StatementBOX25 min
Jul 31, 3:41 PM EDTSevere Thunderstorm WarningBOX64 min
Jul 31, 4:14 PM EDTSevere Thunderstorm WarningBOX61 min
Jul 31, 4:19 PM EDTMesoscale DiscussionSPC56 min
Aug 4, 5:48 PM EDTSpecial Weather StatementBOX42 min
Aug 6, 6:19 AM EDTDense Fog AdvisoryBOX97 min
Aug 7, 1:02 PM EDTMesoscale DiscussionSPC88 min
Aug 7, 1:04 PM EDTSpecial Weather StatementBOX41 min
Aug 7, 10:18 PM EDTSpecial Weather StatementBOX42 min
Aug 7, 10:30 PM EDTSevere Thunderstorm WarningBOX60 min
Aug 7, 10:52 PM EDTAreal Flood WarningBOX113 min
Aug 8, 1:19 AM EDTSevere Thunderstorm WarningBOX56 min
Aug 16, 4:10 AM EDTDense Fog AdvisoryBOX4 hr
Aug 19, 1:38 PM EDTMesoscale DiscussionSPC67 min
Aug 19, 2:20 PM EDTSevere Thunderstorm WatchSPC5 hr
Aug 21, 11:31 AM EDTMesoscale DiscussionSPC119 min
Aug 21, 1:53 PM EDTSevere Thunderstorm WatchSPC7 hr
Aug 21, 3:55 PM EDTMesoscale DiscussionSPC95 min
Aug 21, 6:20 PM EDTMesoscale DiscussionSPC115 min
Aug 28, 2:53 AM EDTFlash Flood WatchBOX28 hr
Sep 4, 3:27 PM EDTMesoscale DiscussionSPC93 min
Sep 4, 6:18 PM EDTSpecial Weather StatementBOX57 min
Sep 15, 6:09 AM EDTDense Fog AdvisoryBOX3 hr
Sep 26, 3:40 PM EDTMesoscale DiscussionSPC2 hr
Oct 9, 3:36 AM EDTFlood WatchBOX42 hr
Oct 10, 3:30 AM EDTCoastal Flood AdvisoryBOX22 hr
Oct 16, 4:23 AM EDTWind AdvisoryBOX38 hr
Oct 23, 6:35 AM EDTDense Fog AdvisoryBOX2 hr
Oct 27, 4:22 PM EDTCoastal Flood AdvisoryBOX23 hr
Oct 28, 4:30 PM EDTCoastal Flood AdvisoryBOX10 hr
Oct 29, 8:02 AM EDTCoastal Flood StatementBOX7 hr
Oct 30, 3:42 AM EDTHigh Wind WatchBOX24 hr
Oct 30, 3:34 PM EDTWind AdvisoryBOX47 hr
Oct 31, 4:08 AM EDTHigh Wind WarningBOX27 hr
Nov 17, 3:21 AM ESTCoastal Flood AdvisoryBOX38 hr
Nov 23, 3:48 PM ESTWind AdvisoryBOX30 hr
Nov 27, 6:55 PM ESTSpecial Weather StatementBOX50 min
Nov 29, 3:58 PM ESTWinter Storm WatchBOX36 hr
Nov 30, 3:49 AM ESTWinter Storm WarningBOX3 days
Nov 30, 3:42 PM ESTWinter Weather AdvisoryBOX69 hr
Dec 1, 7:05 PM ESTMesoscale DiscussionSPC5 hr
Dec 3, 4:36 AM ESTSpecial Weather StatementBOX114 min
Dec 3, 4:51 AM ESTMesoscale DiscussionSPC2 hr
Dec 10, 3:35 AM ESTWinter Weather AdvisoryBOX32 hr
Dec 13, 2:46 AM ESTFlood WatchBOX31 hr
Dec 13, 4:40 PM ESTCoastal Flood StatementBOX21 hr
Dec 14, 3:30 PM ESTWind AdvisoryBOX28 hr
Dec 16, 3:44 AM ESTWinter Weather AdvisoryBOX41 hr
Dec 18, 5:05 PM ESTSpecial Weather StatementBOX55 min
Dec 18, 8:30 PM ESTSpecial Weather StatementBOX60 min
Dec 29, 4:01 AM ESTWinter Weather AdvisoryBOX51 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 archive20182020

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.