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
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 2 | 0% | 6 | 100% | 22 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boston/Norton, MA: tornado warnings | 2 | 0 | 100% | 2 | 0% | |
| NWS Boston/Norton, MA: severe thunderstorm warnings | 114 | 66 | 42% | 250 | 78% | 21 min |
| NWS Boston/Norton, MA: flash flood warnings | 22 | 3 | 86% | 13 | 62% | 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 1, 12:56 AM EST | Wind Advisory | BOX | 5 hr |
| Jan 3, 4:44 AM EST | Wind Advisory | BOX | 19 hr |
| Jan 6, 4:53 AM EST | Winter Weather Advisory | BOX | 32 hr |
| Jan 7, 10:50 AM EST | High Wind Watch | BOX | 6 hr |
| Jan 7, 4:32 PM EST | High Wind Warning | BOX | 19 hr |
| Jan 7, 4:32 PM EST | Wind Advisory | BOX | 26 hr |
| Jan 9, 4:25 AM EST | Winter Storm Watch | BOX | 24 hr |
| Jan 10, 4:39 AM EST | Winter Weather Advisory | BOX | 29 hr |
| Jan 14, 4:02 PM EST | Winter Weather Advisory | BOX | 29 hr |
| Jan 27, 3:51 PM EST | Winter Weather Advisory | BOX | 23 hr |
| Jan 28, 3:33 AM EST | Wind Advisory | BOX | 23 hr |
| Feb 3, 4:40 AM EST | Winter Weather Advisory | BOX | 22 hr |
| Feb 3, 4:47 AM EST | Wind Advisory | BOX | 14 hr |
| Feb 11, 4:40 AM EST | High Wind Watch | BOX | 11 hr |
| Feb 11, 3:48 PM EST | Wind Advisory | BOX | 36 hr |
| Feb 22, 5:11 PM EST | Wind Advisory | BOX | 23 hr |
| Feb 28, 5:07 AM EST | Winter Storm Watch | BOX | 36 hr |
| Mar 1, 4:27 AM EST | Winter Weather Advisory | BOX | 12 hr |
| Mar 1, 4:43 PM EST | Winter Weather Advisory | BOX | 26 hr |
| Mar 29, 6:29 PM EDT | Dense Fog Advisory | BOX | 7 hr |
| Apr 2, 8:40 PM EDT | Dense Fog Advisory | BOX | 12 hr |
| Apr 3, 5:39 PM EDT | Dense Fog Advisory | BOX | 6 hr |
| Apr 6, 4:35 AM EDT | Wind Advisory | BOX | 17 hr |
| Apr 20, 4:19 AM EDT | Wind Advisory | BOX | 24 hr |
| Apr 29, 4:17 AM EDT | Frost Advisory | BOX | 27 hr |
| May 15, 9:54 PM EDT | Dense Fog Advisory | BOX | 10 hr |
| May 18, 4:18 AM EDT | Frost Advisory | BOX | 27 hr |
| May 27, 9:32 PM EDT | Dense Fog Advisory | BOX | 7 hr |
| Jun 21, 4:41 AM EDT | Wind Advisory | BOX | 41 hr |
| Jul 2, 11:21 AM EDT | Severe Thunderstorm Warning | BOX | 39 min |
| Jul 2, 11:51 AM EDT | Severe Thunderstorm Warning | BOX | 39 min |
| Jul 2, 3:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 23, 4:16 PM EDT | Coastal Flood Advisory | BOX | 11 hr |
| Jul 23, 4:16 PM EDT | High Surf Advisory | BOX | 28 hr |
| Aug 21, 4:23 PM EDT | High Surf Advisory | BOX | 72 hr |
| Aug 22, 5:00 AM EDT | Tropical Storm Warning | NHC | 27 hr |
| Aug 22, 5:20 AM EDT | Tropical Storm Warning | BOX | 28 hr |
| Aug 28, 11:07 AM EDT | Coastal Flood Statement | BOX | 6 hr |
| Aug 28, 4:29 PM EDT | Flood Watch | BOX | 26 hr |
| Aug 28, 4:35 PM EDT | Wind Advisory | BOX | 27 hr |
| Aug 28, 5:18 PM EDT | High Surf Advisory | BOX | 53 hr |
| Aug 29, 1:20 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Sep 10, 3:38 PM EDT | High Surf Advisory | BOX | 26 hr |
| Sep 28, 4:01 AM EDT | High Surf Advisory | BOX | 16 hr |
| Oct 3, 6:41 AM EDT | Areal Flood Advisory | BOX | 3 hr |
| Oct 6, 3:28 PM EDT | Wind Advisory | BOX | 36 hr |
| Oct 14, 4:09 AM EDT | Frost Advisory | BOX | 28 hr |
| Oct 14, 4:43 PM EDT | Coastal Flood Statement | BOX | 36 hr |
| Oct 15, 4:43 AM EDT | High Wind Watch | BOX | 65 hr |
| Oct 15, 4:43 AM EDT | Wind Advisory | BOX | 29 hr |
| Oct 15, 4:58 AM EDT | Coastal Flood Watch | BOX | 23 hr |
| Oct 15, 12:16 PM EDT | High Wind Warning | BOX | 22 hr |
| Oct 16, 4:18 AM EDT | Coastal Flood Advisory | BOX | 7 hr |
| Oct 16, 6:30 PM EDT | Coastal Flood Statement | BOX | 10 hr |
| Oct 17, 4:42 AM EDT | Coastal Flood Watch | BOX | 11 hr |
| Oct 17, 3:59 PM EDT | Coastal Flood Warning | BOX | 24 hr |
| Oct 17, 4:15 PM EDT | Wind Advisory | BOX | 36 hr |
| Oct 18, 10:38 AM EDT | High Wind Warning | BOX | 11 hr |
| Oct 18, 4:01 PM EDT | Coastal Flood Advisory | BOX | 11 hr |
| Oct 24, 9:19 PM EDT | Wind Advisory | BOX | 5 hr |
| Oct 28, 4:11 AM EDT | Wind Advisory | BOX | 23 hr |
| Nov 12, 5:16 PM EST | Wind Advisory | BOX | 42 hr |
| Nov 13, 11:51 AM EST | High Wind Watch | BOX | 16 hr |
| Nov 15, 7:09 PM EST | Dense Fog Advisory | BOX | 6 hr |
| Nov 26, 3:30 PM EST | Wind Advisory | BOX | 17 hr |
| Nov 27, 4:10 AM EST | Wind Advisory | BOX | 34 hr |
| Nov 28, 8:40 AM EST | High Wind Warning | BOX | 6 hr |
| Dec 2, 4:06 AM EST | Coastal Flood Watch | BOX | 12 hr |
| Dec 2, 4:16 AM EST | High Wind Watch | BOX | 12 hr |
| Dec 2, 4:16 PM EST | Coastal Flood Advisory | BOX | 20 hr |
| Dec 2, 4:25 PM EST | High Wind Warning | BOX | 18 hr |
| Dec 3, 10:06 AM EST | Wind Advisory | BOX | 3 hr |
| Dec 5, 4:39 AM EST | Wind Advisory | BOX | 27 hr |
| Dec 8, 3:16 AM EST | High Wind Watch | BOX | 26 hr |
| Dec 9, 5:06 AM EST | High Wind Warning | BOX | 10 hr |
| Dec 9, 6:45 PM EST | Wind Advisory | BOX | 7 hr |
| Dec 18, 4:17 AM EST | Winter Storm Watch | BOX | 11 hr |
| Dec 18, 3:20 PM EST | Blizzard Watch | BOX | 13 hr |
| Dec 19, 4:23 AM EST | Blizzard Warning | BOX | 33 hr |
| Dec 20, 12:32 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 29, 4:04 AM EST | Wind Advisory | BOX | 21 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 | 2 |
| Mesoscale Discussion | 2 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Blizzard Warning | 1 |
| Blizzard Watch | 1 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 7 |
| Cold | |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 6 |
| High Wind Watch | 6 |
| Wind Advisory | 23 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
| Tropical | |
| Tropical Storm Warning | 2 |
| Coast and beach | |
| Coastal Flood Warning | 1 |
| Coastal Flood Watch | 3 |
| Coastal Flood Advisory | 4 |
| High Surf Advisory | 5 |
| Coastal Flood Statement | 3 |
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.