Alert archive / Massachusetts / Hampden County
Weather alerts in Hampden County, Massachusetts, 2017
166 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Hampden County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 166
- Warnings
- 36
- Watches
- 19
- Advisories
- 52
- Busiest month
- July24 alerts
- Busiest day
- July 12, 201711 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Hampden County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 11 | 27% | 23 | 78% | 32 min |
| Flash flood warnings | 5 | 1 | 80% | 3 | 100% | 41 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boston/Norton, MA: tornado warnings | 0 | 2 | 0% | |||
| NWS Boston/Norton, MA: severe thunderstorm warnings | 80 | 48 | 40% | 305 | 68% | 25 min |
| NWS Boston/Norton, MA: flash flood warnings | 32 | 11 | 66% | 91 | 84% | 48 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 4, 7:48 PM EST | Special Weather Statement | BOX | 57 min |
| Jan 6, 8:08 AM EST | Special Weather Statement | BOX | 3 hr |
| Jan 6, 2:53 PM EST | Winter Storm Warning | BOX | 34 hr |
| Jan 6, 2:53 PM EST | Winter Weather Advisory | BOX | 31 hr |
| Jan 16, 3:49 AM EST | Winter Weather Advisory | BOX | 54 hr |
| Jan 18, 10:36 AM EST | Freezing Rain Advisory | BOX | 13 hr |
| Jan 21, 7:52 PM EST | Dense Fog Advisory | BOX | 14 hr |
| Jan 22, 3:51 AM EST | High Wind Watch | BOX | 280 days |
| Jan 22, 4:20 PM EST | Winter Weather Advisory | BOX | 47 hr |
| Jan 23, 4:11 AM EST | Wind Advisory | BOX | 31 hr |
| Jan 24, 3:48 PM EST | Freezing Rain Advisory | BOX | 9 hr |
| Jan 24, 8:32 PM EST | Winter Weather Advisory | BOX | 4 hr |
| Jan 30, 3:41 PM EST | Winter Weather Advisory | BOX | 32 hr |
| Feb 6, 4:34 AM EST | Winter Weather Advisory | BOX | 50 hr |
| Feb 7, 2:51 PM EST | Winter Storm Watch | BOX | 14 hr |
| Feb 7, 10:14 PM EST | Winter Weather Advisory | BOX | 9 hr |
| Feb 8, 4:51 AM EST | Winter Storm Warning | BOX | 38 hr |
| Feb 9, 4:55 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 9, 11:05 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 10, 3:27 PM EST | Winter Storm Watch | BOX | 25 hr |
| Feb 11, 4:29 PM EST | Winter Storm Warning | BOX | 39 hr |
| Feb 12, 9:59 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 12, 4:34 PM EST | Wind Advisory | BOX | 26 hr |
| Feb 25, 6:24 PM EST | Mesoscale Discussion | SPC | 66 min |
| Feb 25, 6:57 PM EST | Special Weather Statement | BOX | 48 min |
| Mar 1, 3:13 AM EST | Wind Advisory | BOX | 11 hr |
| Mar 1, 2:03 PM EST | High Wind Warning | BOX | 28 hr |
| Mar 2, 7:58 AM EST | Special Weather Statement | BOX | 62 min |
| Mar 3, 5:50 PM EST | Special Weather Statement | BOX | 55 min |
| Mar 4, 3:48 AM EST | Wind Chill Advisory | BOX | 29 hr |
| Mar 8, 3:03 PM EST | Special Weather Statement | BOX | 57 min |
| Mar 9, 4:00 AM EST | Wind Advisory | BOX | 15 hr |
| Mar 10, 4:03 PM EST | Wind Chill Advisory | BOX | 296 days |
| Mar 11, 10:13 AM EST | Wind Advisory | BOX | 10 hr |
| Mar 11, 5:14 PM EST | Wind Chill Advisory | BOX | 16 hr |
| Mar 11, 5:14 PM EST | Winter Storm Watch | BOX | 46 hr |
| Mar 12, 3:36 PM EDT | Winter Storm Warning | BOX | 49 hr |
| Mar 13, 4:11 PM EDT | Blizzard Warning | BOX | 26 hr |
| Mar 14, 3:22 AM EDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 14, 9:04 AM EDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 14, 6:19 PM EDT | Winter Weather Advisory | BOX | 6 hr |
| Mar 21, 3:23 PM EDT | Wind Advisory | BOX | 28 hr |
| Mar 26, 4:11 AM EDT | Freezing Rain Advisory | BOX | 31 hr |
| Mar 30, 3:59 PM EDT | Winter Weather Advisory | BOX | 47 hr |
| Mar 31, 3:48 AM EDT | Winter Weather Advisory | BOX | 31 hr |
| Mar 31, 8:17 PM EDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 4, 3:38 PM EDT | Flood Watch | BOX | 59 hr |
| Apr 6, 6:07 PM EDT | Special Weather Statement | BOX | 23 min |
| Apr 6, 6:13 PM EDT | Severe Thunderstorm Warning | BOX | 32 min |
| Apr 11, 1:17 PM EDT | River Flood Watch | BOX | 24 hr |
| Apr 11, 1:17 PM EDT | River Flood Watch | BOX | 24 hr |
| Apr 16, 6:28 PM EDT | Special Weather Statement | BOX | 62 min |
| Apr 16, 6:30 PM EDT | Special Weather Statement | BOX | 60 min |
| Apr 16, 6:59 PM EDT | Special Weather Statement | BOX | 46 min |
| May 3, 4:21 AM EDT | Frost Advisory | BOX | 27 hr |
| May 15, 2:22 PM EDT | Wind Advisory | BOX | 5 hr |
| May 31, 12:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 31, 1:22 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 31, 4:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 31, 5:30 PM EDT | Special Weather Statement | BOX | 60 min |
| May 31, 6:12 PM EDT | Severe Thunderstorm Warning | BOX | 33 min |
| May 31, 6:42 PM EDT | Severe Thunderstorm Warning | BOX | 48 min |
| May 31, 6:59 PM EDT | Severe Thunderstorm Warning | BOX | 31 min |
| May 31, 7:28 PM EDT | Severe Thunderstorm Warning | BOX | 43 min |
| May 31, 7:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 13, 7:56 AM EDT | Heat Advisory | BOX | 10 hr |
| Jun 13, 2:25 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 18, 2:58 AM EDT | Flash Flood Watch | BOX | 42 hr |
| Jun 19, 10:45 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 19, 11:13 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 19, 2:01 PM EDT | Areal Flood Advisory | BOX | 119 min |
| Jun 19, 2:23 PM EDT | Special Weather Statement | BOX | 52 min |
| Jun 19, 2:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 4:19 PM EDT | Special Weather Statement | BOX | 41 min |
| Jun 19, 4:29 PM EDT | Severe Thunderstorm Warning | BOX | 61 min |
| Jun 19, 4:31 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Jun 19, 5:28 PM EDT | Special Weather Statement | BOX | 47 min |
| Jun 23, 2:02 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 12:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 2:07 PM EDT | Special Weather Statement | BOX | 53 min |
| Jun 27, 2:49 PM EDT | Severe Thunderstorm Warning | BOX | 41 min |
| Jun 27, 3:32 PM EDT | Special Weather Statement | BOX | 43 min |
| Jun 27, 6:17 PM EDT | Special Weather Statement | BOX | 43 min |
| Jun 30, 1:41 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 4:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jun 30, 5:31 PM EDT | Severe Thunderstorm Warning | BOX | 44 min |
| Jun 30, 7:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 1, 1:19 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 1, 4:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 11:09 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 12, 10:15 AM EDT | Flash Flood Watch | BOX | 11 hr |
| Jul 12, 12:36 PM EDT | Special Weather Statement | BOX | 39 min |
| Jul 12, 12:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 12, 12:53 PM EDT | Severe Thunderstorm Warning | BOX | 67 min |
| Jul 12, 1:19 PM EDT | Areal Flood Advisory | BOX | 56 min |
| Jul 12, 1:22 PM EDT | Severe Thunderstorm Warning | BOX | 38 min |
| Jul 12, 1:47 PM EDT | Special Weather Statement | BOX | 43 min |
| Jul 12, 4:01 PM EDT | Special Weather Statement | BOX | 44 min |
| Jul 12, 4:36 PM EDT | Areal Flood Advisory | BOX | 114 min |
| Jul 12, 4:53 PM EDT | Flash Flood Warning | BOX | 112 min |
| Jul 12, 5:19 PM EDT | Areal Flood Advisory | BOX | 56 min |
| Jul 13, 11:06 AM EDT | Flash Flood Watch | BOX | 8 hr |
| Jul 13, 11:09 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 1:57 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 13, 3:13 PM EDT | Special Weather Statement | BOX | 47 min |
| Jul 18, 6:55 PM EDT | Areal Flood Warning | BOX | 3 hr |
| Jul 18, 7:10 PM EDT | Special Weather Statement | BOX | 35 min |
| Jul 18, 7:29 PM EDT | Areal Flood Warning | BOX | 2 hr |
| Jul 18, 10:05 PM EDT | Areal Flood Warning | BOX | 115 min |
| Jul 18, 10:33 PM EDT | Flash Flood Warning | BOX | 117 min |
| Jul 20, 4:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 2, 11:55 AM EDT | Flash Flood Watch | BOX | 8 hr |
| Aug 2, 1:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 2:22 PM EDT | Severe Thunderstorm Warning | BOX | 38 min |
| Aug 2, 2:24 PM EDT | Flash Flood Warning | BOX | 3 hr |
| Aug 2, 3:02 PM EDT | Special Weather Statement | BOX | 43 min |
| Aug 2, 3:10 PM EDT | Severe Thunderstorm Warning | BOX | 50 min |
| Aug 4, 12:07 PM EDT | Special Weather Statement | BOX | 38 min |
| Aug 4, 1:22 PM EDT | Special Weather Statement | BOX | 53 min |
| Aug 4, 2:31 PM EDT | Special Weather Statement | BOX | 44 min |
| Aug 5, 8:49 AM EDT | Areal Flood Advisory | BOX | 116 min |
| Aug 5, 11:36 AM EDT | Mesoscale Discussion | SPC | 114 min |
| Aug 5, 1:04 PM EDT | Areal Flood Advisory | BOX | 56 min |
| Aug 5, 3:01 PM EDT | Severe Thunderstorm Warning | BOX | 44 min |
| Aug 5, 3:04 PM EDT | Areal Flood Warning | BOX | 116 min |
| Aug 22, 3:55 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 22, 5:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 22, 8:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 22, 10:08 PM EDT | Severe Thunderstorm Warning | BOX | 55 min |
| Aug 22, 10:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Aug 22, 11:33 PM EDT | Severe Thunderstorm Warning | BOX | 57 min |
| Aug 22, 11:47 PM EDT | Special Weather Statement | BOX | 43 min |
| Sep 5, 4:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 26, 9:17 PM EDT | Dense Fog Advisory | BOX | 14 hr |
| Oct 12, 4:26 AM EDT | Frost Advisory | BOX | 27 hr |
| Oct 14, 6:17 PM EDT | Dense Fog Advisory | BOX | 15 hr |
| Oct 16, 4:16 AM EDT | Frost Advisory | BOX | 28 hr |
| Oct 23, 3:23 AM EDT | Dense Fog Advisory | BOX | 7 hr |
| Oct 23, 4:01 PM EDT | Flash Flood Watch | BOX | 52 hr |
| Oct 23, 4:04 PM EDT | Wind Advisory | BOX | 40 hr |
| Oct 24, 8:47 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Oct 24, 9:31 PM EDT | Flash Flood Warning | BOX | 4 hr |
| Oct 24, 9:48 PM EDT | Special Weather Statement | BOX | 42 min |
| Oct 24, 10:27 PM EDT | Special Weather Statement | BOX | 93 min |
| Oct 24, 10:54 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Oct 25, 1:23 AM EDT | Flash Flood Warning | BOX | 3 hr |
| Oct 25, 1:55 AM EDT | Areal Flood Advisory | BOX | 3 hr |
| Oct 26, 7:18 AM EDT | Special Weather Statement | BOX | 87 min |
| Oct 26, 8:34 AM EDT | Areal Flood Warning | BOX | 6 hr |
| Oct 28, 3:27 AM EDT | Flash Flood Watch | BOX | 50 hr |
| Oct 28, 4:31 PM EDT | High Wind Warning | BOX | 45 hr |
| Oct 29, 8:30 PM EDT | Areal Flood Warning | BOX | 10 hr |
| Oct 29, 11:04 PM EDT | Areal Flood Warning | BOX | 6 hr |
| Oct 30, 4:15 AM EDT | Wind Advisory | BOX | 13 hr |
| Nov 9, 3:35 AM EST | Wind Advisory | BOX | 36 hr |
| Nov 18, 3:57 AM EST | Wind Advisory | BOX | 39 hr |
| Dec 8, 3:41 AM EST | Winter Weather Advisory | BOX | 48 hr |
| Dec 11, 3:48 AM EST | Winter Weather Advisory | BOX | 36 hr |
| Dec 12, 4:07 PM EST | Wind Advisory | BOX | 30 hr |
| Dec 21, 4:01 AM EST | Winter Weather Advisory | BOX | 62 hr |
| Dec 24, 2:58 AM EST | Wind Advisory | BOX | 38 hr |
| Dec 24, 3:03 AM EST | Winter Storm Warning | BOX | 33 hr |
| Dec 24, 3:03 AM EST | Winter Weather Advisory | BOX | 33 hr |
| Dec 25, 4:36 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 27, 4:06 AM EST | Wind Chill Warning | BOX | 32 hr |
| Dec 27, 4:06 AM EST | Wind Chill Advisory | BOX | 48 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 archive20162018
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.