Alert archive / Massachusetts / Suffolk County

Weather alerts in Suffolk County, Massachusetts, 2023

119 weather alerts in 2023, 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 2023. Tap one for its archive.

Alerts
119
Warnings
28
Watches
22
Advisories
25
Busiest month
July33 alerts
Busiest day
July 29, 20239 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, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings8713%520%44 min
Flash flood warnings7271%989%30 min

Each office's whole area, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Boston/Norton, MA: tornado warnings17476%1362%15 min
NWS Boston/Norton, MA: severe thunderstorm warnings926727%26370%30 min
NWS Boston/Norton, MA: flash flood warnings731678%7691%76 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 19, 4:35 AM ESTCoastal Flood AdvisoryBOX31 hr
Jan 20, 2:39 PM ESTCoastal Flood AdvisoryBOX21 hr
Jan 21, 2:58 PM ESTWinter Weather AdvisoryBOX54 hr
Jan 22, 3:14 AM ESTCoastal Flood AdvisoryBOX35 hr
Jan 23, 1:47 PM ESTMesoscale DiscussionSPC3 hr
Jan 24, 2:28 PM ESTFlood WatchBOX41 hr
Feb 1, 3:11 AM ESTWind Chill WatchBOX24 hr
Feb 2, 3:38 AM ESTWind Chill WarningBOX57 hr
Feb 7, 3:02 AM ESTWinter Weather AdvisoryBOX23 hr
Feb 21, 4:10 AM ESTCoastal Flood StatementBOX11 hr
Feb 22, 3:14 PM ESTWinter Weather AdvisoryBOX36 hr
Feb 23, 6:54 PM ESTMesoscale DiscussionSPC4 hr
Feb 26, 2:59 PM ESTWinter Weather AdvisoryBOX48 hr
Mar 3, 3:27 AM ESTWind AdvisoryBOX38 hr
Mar 3, 3:28 AM ESTWinter Weather AdvisoryBOX35 hr
Mar 11, 3:09 PM ESTWinter Storm WatchBOX47 hr
Mar 12, 4:00 AM EDTHigh Wind WatchBOX23 hr
Mar 12, 3:35 PM EDTWinter Storm WarningBOX58 hr
Mar 13, 3:14 AM EDTHigh Wind WarningBOX43 hr
Mar 13, 3:25 AM EDTCoastal Flood WatchBOX12 hr
Mar 13, 3:36 PM EDTWinter Weather AdvisoryBOX34 hr
Mar 13, 3:43 PM EDTCoastal Flood AdvisoryBOX40 hr
Apr 1, 4:07 AM EDTDense Fog AdvisoryBOX6 hr
Apr 1, 6:18 PM EDTMesoscale DiscussionSPC57 min
Apr 6, 3:48 PM EDTFire Weather WatchBOX11 hr
Apr 7, 3:12 AM EDTRed Flag WarningBOX17 hr
Apr 10, 2:09 PM EDTFire Weather WatchBOX12 hr
Apr 11, 1:48 AM EDTRed Flag WarningBOX17 hr
Apr 11, 7:09 PM EDTRed Flag WarningBOX24 hr
May 15, 3:58 AM EDTFire Weather WatchBOX40 hr
May 16, 2:29 AM EDTRed Flag WarningBOX17 hr
May 16, 7:45 PM EDTRed Flag WarningBOX24 hr
May 27, 3:45 AM EDTBeach Hazards StatementBOX16 hr
Jun 2, 3:12 PM EDTHigh Surf AdvisoryBOX3 days
Jun 2, 6:59 PM EDTSpecial Weather StatementBOX61 min
Jun 3, 4:23 AM EDTCoastal Flood StatementBOX22 hr
Jun 4, 3:00 AM EDTCoastal Flood AdvisoryBOX23 hr
Jun 5, 2:53 AM EDTCoastal Flood StatementBOX24 hr
Jun 6, 7:39 PM EDTCoastal Flood StatementBOX8 hr
Jun 7, 4:42 PM EDTCoastal Flood StatementBOX14 hr
Jun 10, 2:16 PM EDTSpecial Weather StatementBOX29 min
Jun 13, 6:55 PM EDTDense Fog AdvisoryBOX14 hr
Jun 14, 7:27 PM EDTSevere Thunderstorm WarningBOX48 min
Jun 17, 4:04 PM EDTSpecial Weather StatementBOX56 min
Jul 6, 6:54 PM EDTSpecial Weather StatementBOX51 min
Jul 10, 2:24 PM EDTSpecial Weather StatementBOX66 min
Jul 14, 9:52 AM EDTMesoscale DiscussionSPC113 min
Jul 15, 3:09 AM EDTFlood WatchBOX44 hr
Jul 16, 10:40 AM EDTMesoscale DiscussionSPC95 min
Jul 16, 12:24 PM EDTAreal Flood WarningBOX3 hr
Jul 16, 1:31 PM EDTMesoscale DiscussionSPC89 min
Jul 16, 2:19 PM EDTFlash Flood WarningBOX5 hr
Jul 21, 9:43 PM EDTFlash Flood WarningBOX3 hr
Jul 21, 9:48 PM EDTSpecial Weather StatementBOX57 min
Jul 21, 10:20 PM EDTSpecial Weather StatementBOX55 min
Jul 25, 2:42 PM EDTSpecial Weather StatementBOX48 min
Jul 25, 2:50 PM EDTSevere Thunderstorm WarningBOX55 min
Jul 25, 3:00 PM EDTSpecial Weather StatementBOX60 min
Jul 25, 3:27 PM EDTHeat AdvisoryBOX4 days
Jul 25, 3:48 PM EDTSevere Thunderstorm WarningBOX27 min
Jul 25, 3:59 PM EDTFlash Flood WarningBOX100 min
Jul 26, 12:37 PM EDTFlood WatchBOX31 hr
Jul 27, 11:05 AM EDTMesoscale DiscussionSPC115 min
Jul 27, 12:48 PM EDTSevere Thunderstorm WatchSPC8 hr
Jul 27, 4:20 PM EDTMesoscale DiscussionSPC85 min
Jul 27, 5:27 PM EDTSevere Thunderstorm WarningBOX48 min
Jul 27, 6:01 PM EDTSevere Thunderstorm WarningBOX59 min
Jul 27, 6:07 PM EDTMesoscale DiscussionSPC83 min
Jul 29, 3:08 AM EDTFlood WatchBOX19 hr
Jul 29, 11:33 AM EDTMesoscale DiscussionSPC117 min
Jul 29, 1:30 PM EDTSpecial Weather StatementBOX60 min
Jul 29, 1:33 PM EDTSevere Thunderstorm WatchSPC7 hr
Jul 29, 1:39 PM EDTFlash Flood WarningBOX73 min
Jul 29, 1:51 PM EDTSpecial Weather StatementBOX39 min
Jul 29, 4:45 PM EDTMesoscale DiscussionSPC2 hr
Jul 29, 4:50 PM EDTFlash Flood WarningBOX4 hr
Jul 29, 7:13 PM EDTMesoscale DiscussionSPC92 min
Aug 1, 2:56 AM EDTCoastal Flood StatementBOX23 hr
Aug 2, 3:14 AM EDTCoastal Flood StatementBOX23 hr
Aug 3, 3:19 PM EDTCoastal Flood StatementBOX12 hr
Aug 4, 12:10 PM EDTSevere Thunderstorm WatchSPC10 hr
Aug 8, 3:10 AM EDTFlood WatchBOX15 hr
Aug 8, 10:01 AM EDTSpecial Weather StatementBOX44 min
Aug 8, 10:21 AM EDTSevere Thunderstorm WarningBOX54 min
Aug 8, 10:47 AM EDTFlash Flood WarningBOX3 hr
Aug 9, 2:37 PM EDTFlood WatchBOX26 hr
Aug 13, 5:26 PM EDTSpecial Weather StatementBOX64 min
Aug 18, 9:12 AM EDTSevere Thunderstorm WarningBOX63 min
Aug 18, 9:18 AM EDTFlash Flood WarningBOX79 min
Aug 18, 9:23 AM EDTMesoscale DiscussionSPC67 min
Aug 30, 2:13 AM EDTDense Fog AdvisoryBOX7 hr
Sep 4, 2:49 PM EDTHeat AdvisoryBOX4 days
Sep 8, 2:52 PM EDTSevere Thunderstorm WarningBOX53 min
Sep 9, 3:11 PM EDTSpecial Weather StatementBOX49 min
Sep 9, 4:10 PM EDTSpecial Weather StatementBOX65 min
Sep 10, 1:20 PM EDTSpecial Weather StatementBOX40 min
Sep 11, 3:00 AM EDTFlood WatchBOX23 hr
Sep 11, 8:26 PM EDTSpecial Weather StatementBOX94 min
Sep 12, 12:58 PM EDTFlood WatchBOX34 hr
Sep 13, 11:14 AM EDTMesoscale DiscussionSPC2 hr
Sep 13, 5:00 PM EDTTropical Storm WatchBOX24 hr
Sep 14, 10:58 AM EDTTropical Storm WarningBOX48 hr
Sep 14, 5:43 PM EDTHigh Surf AdvisoryBOX58 hr
Sep 15, 5:07 AM EDTCoastal Flood AdvisoryBOX28 hr
Sep 17, 3:54 AM EDTRip Current StatementBOX16 hr
Sep 18, 2:47 AM EDTFlood WatchBOX22 hr
Sep 18, 8:09 PM EDTSpecial Weather StatementBOX66 min
Oct 5, 3:27 AM EDTDense Fog AdvisoryBOX7 hr
Oct 5, 3:32 PM EDTDense Fog AdvisoryBOX19 hr
Dec 8, 2:23 PM ESTFlood WatchBOX67 hr
Dec 10, 4:08 AM ESTWind AdvisoryBOX25 hr
Dec 11, 2:41 AM ESTAreal Flood WarningBOX7 hr
Dec 16, 4:10 AM ESTHigh Wind WatchBOX23 hr
Dec 17, 2:59 AM ESTHigh Wind WarningBOX37 hr
Dec 18, 10:57 AM ESTMesoscale DiscussionSPC3 hr
Dec 18, 11:27 AM ESTSpecial Weather StatementBOX63 min
Dec 18, 3:33 PM ESTRiver Flood WarningBOX22 hr
Dec 25, 7:01 PM ESTDense Fog AdvisoryBOX18 hr
Dec 26, 7:22 PM ESTDense Fog AdvisoryBOX12 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 archive20222024

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.