Alert archive / Massachusetts / Dukes County

Weather alerts in Dukes County, Massachusetts, 2009

81 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Dukes County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts
81
Warnings
12
Watches
14
Advisories
50
Busiest month
October17 alerts
Busiest day
August 28, 20094 alerts

Over time

By month

Warning verification

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

Dukes County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings220%6100%22 min
Flash flood warnings00

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Boston/Norton, MA: tornado warnings20100%20%
NWS Boston/Norton, MA: severe thunderstorm warnings1146642%25078%21 min
NWS Boston/Norton, MA: flash flood warnings22386%1362%68 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 1, 12:56 AM ESTWind AdvisoryBOX5 hr
Jan 3, 4:44 AM ESTWind AdvisoryBOX19 hr
Jan 6, 4:53 AM ESTWinter Weather AdvisoryBOX32 hr
Jan 7, 10:50 AM ESTHigh Wind WatchBOX6 hr
Jan 7, 4:32 PM ESTHigh Wind WarningBOX19 hr
Jan 7, 4:32 PM ESTWind AdvisoryBOX26 hr
Jan 9, 4:25 AM ESTWinter Storm WatchBOX24 hr
Jan 10, 4:39 AM ESTWinter Weather AdvisoryBOX29 hr
Jan 14, 4:02 PM ESTWinter Weather AdvisoryBOX29 hr
Jan 27, 3:51 PM ESTWinter Weather AdvisoryBOX23 hr
Jan 28, 3:33 AM ESTWind AdvisoryBOX23 hr
Feb 3, 4:40 AM ESTWinter Weather AdvisoryBOX22 hr
Feb 3, 4:47 AM ESTWind AdvisoryBOX14 hr
Feb 11, 4:40 AM ESTHigh Wind WatchBOX11 hr
Feb 11, 3:48 PM ESTWind AdvisoryBOX36 hr
Feb 22, 5:11 PM ESTWind AdvisoryBOX23 hr
Feb 28, 5:07 AM ESTWinter Storm WatchBOX36 hr
Mar 1, 4:27 AM ESTWinter Weather AdvisoryBOX12 hr
Mar 1, 4:43 PM ESTWinter Weather AdvisoryBOX26 hr
Mar 29, 6:29 PM EDTDense Fog AdvisoryBOX7 hr
Apr 2, 8:40 PM EDTDense Fog AdvisoryBOX12 hr
Apr 3, 5:39 PM EDTDense Fog AdvisoryBOX6 hr
Apr 6, 4:35 AM EDTWind AdvisoryBOX17 hr
Apr 20, 4:19 AM EDTWind AdvisoryBOX24 hr
Apr 29, 4:17 AM EDTFrost AdvisoryBOX27 hr
May 15, 9:54 PM EDTDense Fog AdvisoryBOX10 hr
May 18, 4:18 AM EDTFrost AdvisoryBOX27 hr
May 27, 9:32 PM EDTDense Fog AdvisoryBOX7 hr
Jun 21, 4:41 AM EDTWind AdvisoryBOX41 hr
Jul 2, 11:21 AM EDTSevere Thunderstorm WarningBOX39 min
Jul 2, 11:51 AM EDTSevere Thunderstorm WarningBOX39 min
Jul 2, 3:20 PM EDTMesoscale DiscussionSPC55 min
Jul 23, 4:16 PM EDTCoastal Flood AdvisoryBOX11 hr
Jul 23, 4:16 PM EDTHigh Surf AdvisoryBOX28 hr
Aug 21, 4:23 PM EDTHigh Surf AdvisoryBOX72 hr
Aug 22, 5:00 AM EDTTropical Storm WarningNHC27 hr
Aug 22, 5:20 AM EDTTropical Storm WarningBOX28 hr
Aug 28, 11:07 AM EDTCoastal Flood StatementBOX6 hr
Aug 28, 4:29 PM EDTFlood WatchBOX26 hr
Aug 28, 4:35 PM EDTWind AdvisoryBOX27 hr
Aug 28, 5:18 PM EDTHigh Surf AdvisoryBOX53 hr
Aug 29, 1:20 PM EDTAreal Flood AdvisoryBOX3 hr
Sep 10, 3:38 PM EDTHigh Surf AdvisoryBOX26 hr
Sep 28, 4:01 AM EDTHigh Surf AdvisoryBOX16 hr
Oct 3, 6:41 AM EDTAreal Flood AdvisoryBOX3 hr
Oct 6, 3:28 PM EDTWind AdvisoryBOX36 hr
Oct 14, 4:09 AM EDTFrost AdvisoryBOX28 hr
Oct 14, 4:43 PM EDTCoastal Flood StatementBOX36 hr
Oct 15, 4:43 AM EDTHigh Wind WatchBOX65 hr
Oct 15, 4:43 AM EDTWind AdvisoryBOX29 hr
Oct 15, 4:58 AM EDTCoastal Flood WatchBOX23 hr
Oct 15, 12:16 PM EDTHigh Wind WarningBOX22 hr
Oct 16, 4:18 AM EDTCoastal Flood AdvisoryBOX7 hr
Oct 16, 6:30 PM EDTCoastal Flood StatementBOX10 hr
Oct 17, 4:42 AM EDTCoastal Flood WatchBOX11 hr
Oct 17, 3:59 PM EDTCoastal Flood WarningBOX24 hr
Oct 17, 4:15 PM EDTWind AdvisoryBOX36 hr
Oct 18, 10:38 AM EDTHigh Wind WarningBOX11 hr
Oct 18, 4:01 PM EDTCoastal Flood AdvisoryBOX11 hr
Oct 24, 9:19 PM EDTWind AdvisoryBOX5 hr
Oct 28, 4:11 AM EDTWind AdvisoryBOX23 hr
Nov 12, 5:16 PM ESTWind AdvisoryBOX42 hr
Nov 13, 11:51 AM ESTHigh Wind WatchBOX16 hr
Nov 15, 7:09 PM ESTDense Fog AdvisoryBOX6 hr
Nov 26, 3:30 PM ESTWind AdvisoryBOX17 hr
Nov 27, 4:10 AM ESTWind AdvisoryBOX34 hr
Nov 28, 8:40 AM ESTHigh Wind WarningBOX6 hr
Dec 2, 4:06 AM ESTCoastal Flood WatchBOX12 hr
Dec 2, 4:16 AM ESTHigh Wind WatchBOX12 hr
Dec 2, 4:16 PM ESTCoastal Flood AdvisoryBOX20 hr
Dec 2, 4:25 PM ESTHigh Wind WarningBOX18 hr
Dec 3, 10:06 AM ESTWind AdvisoryBOX3 hr
Dec 5, 4:39 AM ESTWind AdvisoryBOX27 hr
Dec 8, 3:16 AM ESTHigh Wind WatchBOX26 hr
Dec 9, 5:06 AM ESTHigh Wind WarningBOX10 hr
Dec 9, 6:45 PM ESTWind AdvisoryBOX7 hr
Dec 18, 4:17 AM ESTWinter Storm WatchBOX11 hr
Dec 18, 3:20 PM ESTBlizzard WatchBOX13 hr
Dec 19, 4:23 AM ESTBlizzard WarningBOX33 hr
Dec 20, 12:32 AM ESTMesoscale DiscussionSPC4 hr
Dec 29, 4:04 AM ESTWind AdvisoryBOX21 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 archive20082010

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.