Alert archive / Massachusetts / Hampshire County
Weather alerts in Hampshire County, Massachusetts, 2018
201 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Hampshire County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 201
- Warnings
- 58
- Watches
- 28
- Advisories
- 66
- Busiest month
- July34 alerts
- Busiest day
- July 17, 201812 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 3 tornado warnings covering Hampshire County in 2018 had a tornado report inside them.
Hampshire County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 17 | 6 | 65% | 11 | 27% | 14 min |
| Flash flood warnings | 10 | 3 | 70% | 2 | 100% | 59 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boston/Norton, MA: tornado warnings | 16 | 4 | 75% | 12 | 42% | 11 min |
| NWS Boston/Norton, MA: severe thunderstorm warnings | 91 | 44 | 52% | 233 | 59% | 24 min |
| NWS Boston/Norton, MA: flash flood warnings | 36 | 10 | 72% | 114 | 94% | 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, 10:16 PM EST | Wind Chill Advisory | BOX | 13 hr |
| Jan 3, 3:50 AM EST | Winter Storm Warning | BOX | 39 hr |
| Jan 3, 3:50 AM EST | Winter Weather Advisory | BOX | 11 hr |
| Jan 4, 3:46 AM EST | Wind Chill Watch | BOX | 24 hr |
| Jan 4, 7:14 PM EST | Wind Advisory | BOX | 5 hr |
| Jan 4, 8:15 PM EST | Wind Chill Advisory | BOX | 8 hr |
| Jan 5, 4:02 AM EST | Wind Chill Warning | BOX | 54 hr |
| Jan 5, 8:22 AM EST | Wind Advisory | BOX | 14 hr |
| Jan 10, 3:17 PM EST | Flood Watch | BOX | 70 hr |
| Jan 11, 10:40 PM EST | Dense Fog Advisory | BOX | 10 hr |
| Jan 12, 3:35 AM EST | Winter Weather Advisory | BOX | 33 hr |
| Jan 12, 12:43 PM EST | Areal Flood Advisory | BOX | 4 hr |
| Jan 12, 1:36 PM EST | Areal Flood Warning | BOX | 6 hr |
| Jan 12, 2:26 PM EST | Areal Flood Warning | BOX | 6 hr |
| Jan 12, 5:33 PM EST | Areal Flood Warning | BOX | 6 hr |
| Jan 12, 11:19 PM EST | Areal Flood Warning | BOX | 6 hr |
| Jan 13, 10:45 AM EST | Areal Flood Warning | BOX | 3 hr |
| Jan 15, 3:46 AM EST | Winter Storm Watch | BOX | 24 hr |
| Jan 16, 3:56 AM EST | Winter Storm Warning | BOX | 35 hr |
| Jan 16, 3:56 AM EST | Winter Weather Advisory | BOX | 35 hr |
| Jan 22, 4:20 AM EST | Winter Weather Advisory | BOX | 34 hr |
| Jan 22, 1:11 PM EST | Dense Fog Advisory | BOX | 22 hr |
| Feb 5, 3:46 PM EST | Winter Storm Watch | BOX | 25 hr |
| Feb 6, 4:17 PM EST | Winter Storm Warning | BOX | 30 hr |
| Feb 7, 11:25 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 7, 6:21 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 10, 8:19 PM EST | Dense Fog Advisory | BOX | 13 hr |
| Feb 17, 3:30 AM EST | Winter Weather Advisory | BOX | 27 hr |
| Feb 23, 3:25 AM EST | Winter Weather Advisory | BOX | 18 hr |
| Feb 24, 3:59 AM EST | Winter Weather Advisory | BOX | 36 hr |
| Feb 28, 3:27 PM EST | Flood Watch | BOX | 57 hr |
| Mar 1, 3:32 AM EST | Winter Storm Watch | BOX | 25 hr |
| Mar 1, 3:27 PM EST | Winter Storm Warning | BOX | 29 hr |
| Mar 1, 3:38 PM EST | Wind Advisory | BOX | 60 hr |
| Mar 2, 11:14 AM EST | Areal Flood Advisory | BOX | 4 hr |
| Mar 5, 3:39 AM EST | Winter Storm Watch | BOX | 35 hr |
| Mar 6, 3:48 AM EST | Winter Storm Warning | BOX | 57 hr |
| Mar 9, 8:26 AM EST | Special Weather Statement | BOX | 3 hr |
| Mar 11, 3:51 AM EDT | Winter Storm Watch | BOX | 24 hr |
| Mar 12, 3:46 AM EDT | Winter Storm Warning | BOX | 46 hr |
| Mar 14, 3:53 AM EDT | Winter Weather Advisory | BOX | 27 hr |
| Mar 19, 3:27 PM EDT | Winter Storm Watch | BOX | 36 hr |
| Mar 30, 2:07 AM EDT | Dense Fog Advisory | BOX | 8 hr |
| Apr 3, 3:00 PM EDT | Wind Advisory | BOX | 37 hr |
| Apr 4, 4:52 AM EDT | High Wind Warning | BOX | 20 hr |
| Apr 13, 3:02 PM EDT | Winter Weather Advisory | BOX | 67 hr |
| Apr 15, 9:52 AM EDT | Winter Weather Advisory | BOX | 16 hr |
| Apr 16, 11:15 AM EDT | Areal Flood Advisory | BOX | 4 hr |
| Apr 16, 1:26 PM EDT | Areal Flood Warning | BOX | 6 hr |
| May 4, 3:38 AM EDT | Wind Advisory | BOX | 27 hr |
| May 4, 5:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| May 4, 6:20 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 4, 8:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 4, 9:26 PM EDT | Special Weather Statement | BOX | 49 min |
| May 4, 9:35 PM EDT | Severe Thunderstorm Warning | BOX | 55 min |
| May 15, 11:08 AM EDT | Special Weather Statement | BOX | 37 min |
| May 15, 11:43 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 15, 1:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 2:23 PM EDT | Tornado Watch | SPC | 4 hr |
| May 15, 2:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 3:06 PM EDT | Severe Thunderstorm Warning | BOX | 54 min |
| May 15, 3:13 PM EDT | Severe Thunderstorm Warning | BOX | 47 min |
| May 15, 3:33 PM EDT | Severe Thunderstorm Warning | BOX | 42 min |
| Jun 17, 4:51 PM EDT | Heat Advisory | BOX | 25 hr |
| Jun 18, 5:34 PM EDT | Tornado Warning | BOX | 26 min |
| Jun 18, 5:44 PM EDT | Severe Thunderstorm Warning | BOX | 33 min |
| Jun 18, 5:49 PM EDT | Tornado Warning | BOX | 26 min |
| Jun 18, 5:55 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 6:20 PM EDT | Severe Thunderstorm Warning | BOX | 40 min |
| Jun 18, 6:33 PM EDT | Tornado Warning | BOX | 24 min |
| Jun 28, 3:53 AM EDT | Flash Flood Watch | BOX | 7 hr |
| Jun 28, 5:16 AM EDT | Special Weather Statement | BOX | 89 min |
| Jun 28, 2:41 PM EDT | Areal Flood Advisory | BOX | 3 hr |
| Jun 29, 3:22 PM EDT | Excessive Heat Watch | BOX | 48 hr |
| Jun 30, 4:16 PM EDT | Excessive Heat Warning | BOX | 28 hr |
| Jun 30, 4:16 PM EDT | Heat Advisory | BOX | 28 hr |
| Jul 1, 3:30 PM EDT | Heat Advisory | BOX | 4 days |
| Jul 3, 2:54 PM EDT | Special Weather Statement | BOX | 51 min |
| Jul 6, 9:47 AM EDT | Special Weather Statement | BOX | 43 min |
| Jul 10, 4:22 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 4:15 AM EDT | Flash Flood Watch | BOX | 15 hr |
| Jul 17, 10:35 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 17, 11:04 AM EDT | Flash Flood Warning | BOX | 3 hr |
| Jul 17, 11:17 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 17, 11:39 AM EDT | Severe Thunderstorm Warning | BOX | 51 min |
| Jul 17, 11:46 AM EDT | Flash Flood Warning | BOX | 3 hr |
| Jul 17, 12:30 PM EDT | Flash Flood Warning | BOX | 2 hr |
| Jul 17, 12:45 PM EDT | Severe Thunderstorm Warning | BOX | 45 min |
| Jul 17, 1:59 PM EDT | Severe Thunderstorm Warning | BOX | 46 min |
| Jul 17, 2:19 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 17, 2:22 PM EDT | Areal Flood Warning | BOX | 3 hr |
| Jul 17, 3:10 PM EDT | Flash Flood Warning | BOX | 2 hr |
| Jul 23, 12:00 PM EDT | Areal Flood Advisory | BOX | 60 min |
| Jul 23, 12:12 PM EDT | Special Weather Statement | BOX | 33 min |
| Jul 23, 12:56 PM EDT | Areal Flood Advisory | BOX | 34 min |
| Jul 23, 1:07 PM EDT | Areal Flood Advisory | BOX | 53 min |
| Jul 23, 1:55 PM EDT | Areal Flood Advisory | BOX | 65 min |
| Jul 23, 4:48 PM EDT | Areal Flood Warning | BOX | 3 hr |
| Jul 24, 1:54 PM EDT | Special Weather Statement | BOX | 51 min |
| Jul 25, 9:39 AM EDT | Flash Flood Watch | BOX | 18 hr |
| Jul 25, 11:32 AM EDT | Flash Flood Warning | BOX | 2 hr |
| Jul 25, 10:10 PM EDT | Areal Flood Warning | BOX | 3 hr |
| Jul 27, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 27, 3:58 PM EDT | Special Weather Statement | BOX | 32 min |
| Jul 27, 4:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 27, 6:57 PM EDT | Special Weather Statement | BOX | 48 min |
| Jul 27, 7:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 27, 7:11 PM EDT | Special Weather Statement | BOX | 64 min |
| Jul 27, 7:42 PM EDT | Special Weather Statement | BOX | 48 min |
| Jul 28, 3:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Aug 2, 4:47 PM EDT | Severe Thunderstorm Warning | BOX | 43 min |
| Aug 2, 5:07 PM EDT | Severe Thunderstorm Warning | BOX | 38 min |
| Aug 3, 2:41 PM EDT | Flash Flood Watch | BOX | 25 hr |
| Aug 3, 4:15 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Aug 3, 5:08 PM EDT | Flash Flood Warning | BOX | 112 min |
| Aug 3, 5:50 PM EDT | Special Weather Statement | BOX | 55 min |
| Aug 3, 5:59 PM EDT | Flash Flood Warning | BOX | 71 min |
| Aug 3, 6:03 PM EDT | Severe Thunderstorm Warning | BOX | 27 min |
| Aug 3, 6:04 PM EDT | Severe Thunderstorm Warning | BOX | 41 min |
| Aug 4, 5:56 AM EDT | Special Weather Statement | BOX | 49 min |
| Aug 4, 7:02 AM EDT | Areal Flood Advisory | BOX | 58 min |
| Aug 4, 8:48 AM EDT | Areal Flood Advisory | BOX | 3 hr |
| Aug 5, 2:58 PM EDT | Heat Advisory | BOX | 53 hr |
| Aug 7, 1:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Aug 7, 5:23 PM EDT | Special Weather Statement | BOX | 37 min |
| Aug 8, 3:29 AM EDT | Heat Advisory | BOX | 15 hr |
| Aug 8, 10:44 PM EDT | Special Weather Statement | BOX | 61 min |
| Aug 8, 11:24 PM EDT | Special Weather Statement | BOX | 51 min |
| Aug 10, 3:20 PM EDT | Flash Flood Watch | BOX | 48 hr |
| Aug 11, 8:45 PM EDT | Areal Flood Advisory | BOX | 2 hr |
| Aug 14, 12:24 PM EDT | Severe Thunderstorm Warning | BOX | 30 min |
| Aug 14, 2:44 PM EDT | Special Weather Statement | BOX | 46 min |
| Aug 17, 2:42 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 17, 3:44 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 17, 8:38 PM EDT | Special Weather Statement | BOX | 67 min |
| Aug 17, 10:44 PM EDT | Severe Thunderstorm Warning | BOX | 49 min |
| Aug 17, 10:59 PM EDT | Areal Flood Advisory | BOX | 101 min |
| Aug 18, 12:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 1:29 PM EDT | Special Weather Statement | BOX | 31 min |
| Aug 18, 1:49 PM EDT | Severe Thunderstorm Warning | BOX | 26 min |
| Aug 18, 2:22 PM EDT | Flash Flood Warning | BOX | 2 hr |
| Aug 27, 2:51 AM EDT | Heat Advisory | BOX | 66 hr |
| Aug 27, 3:20 PM EDT | Excessive Heat Warning | BOX | 54 hr |
| Sep 2, 2:54 PM EDT | Heat Advisory | BOX | 48 hr |
| Sep 5, 2:55 PM EDT | Heat Advisory | BOX | 27 hr |
| Sep 6, 12:09 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 6, 2:59 PM EDT | Severe Thunderstorm Warning | BOX | 47 min |
| Sep 16, 4:04 AM EDT | Dense Fog Advisory | BOX | 4 hr |
| Sep 17, 3:36 AM EDT | Flash Flood Watch | BOX | 39 hr |
| Sep 18, 7:54 AM EDT | Special Weather Statement | BOX | 81 min |
| Sep 18, 8:52 AM EDT | Flash Flood Warning | BOX | 4 hr |
| Sep 18, 10:58 AM EDT | Flash Flood Warning | BOX | 4 hr |
| Sep 18, 12:32 PM EDT | Areal Flood Warning | BOX | 4 hr |
| Sep 26, 9:01 PM EDT | Areal Flood Advisory | BOX | 59 min |
| Sep 26, 10:09 PM EDT | Areal Flood Advisory | BOX | 40 min |
| Oct 2, 3:10 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 10, 2:42 PM EDT | Flash Flood Watch | BOX | 47 hr |
| Oct 11, 3:03 PM EDT | Areal Flood Advisory | BOX | 117 min |
| Oct 13, 4:13 AM EDT | Frost Advisory | BOX | 29 hr |
| Oct 15, 8:44 PM EDT | Wind Advisory | BOX | 9 hr |
| Oct 17, 2:51 AM EDT | Freeze Watch | BOX | 12 hr |
| Oct 17, 2:51 AM EDT | Wind Advisory | BOX | 31 hr |
| Oct 17, 3:18 PM EDT | Freeze Warning | BOX | 12 hr |
| Oct 18, 3:42 AM EDT | Freeze Warning | BOX | 29 hr |
| Oct 23, 3:23 PM EDT | Special Weather Statement | BOX | 52 min |
| Nov 2, 4:35 AM EDT | High Wind Watch | BOX | 10 hr |
| Nov 2, 2:40 PM EDT | Wind Advisory | BOX | 28 hr |
| Nov 3, 2:46 AM EDT | Flash Flood Watch | BOX | 7 hr |
| Nov 3, 5:49 AM EDT | Areal Flood Warning | BOX | 2 hr |
| Nov 8, 3:20 PM EST | Flood Watch | BOX | 36 hr |
| Nov 9, 3:32 PM EST | Wind Advisory | BOX | 27 hr |
| Nov 14, 3:55 AM EST | Wind Advisory | BOX | 12 hr |
| Nov 14, 3:31 PM EST | Winter Storm Watch | BOX | 13 hr |
| Nov 14, 3:31 PM EST | Winter Weather Advisory | BOX | 34 hr |
| Nov 15, 11:20 AM EST | Winter Storm Warning | BOX | 17 hr |
| Nov 15, 4:39 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 15, 10:06 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 16, 3:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 16, 4:16 AM EST | Winter Weather Advisory | BOX | 8 hr |
| Nov 19, 4:08 AM EST | Winter Weather Advisory | BOX | 33 hr |
| Nov 21, 3:54 AM EST | Wind Chill Advisory | BOX | 30 hr |
| Nov 21, 2:43 PM EST | Special Weather Statement | BOX | 92 min |
| Nov 26, 3:16 AM EST | Dense Fog Advisory | BOX | 7 hr |
| Nov 26, 3:31 AM EST | Winter Weather Advisory | BOX | 30 hr |
| Nov 27, 3:20 PM EST | Winter Weather Advisory | BOX | 12 hr |
| Nov 30, 3:03 PM EST | Special Weather Statement | BOX | 3 hr |
| Nov 30, 7:26 PM EST | Special Weather Statement | BOX | 3 hr |
| Dec 1, 2:25 AM EST | Winter Weather Advisory | BOX | 32 hr |
| Dec 2, 3:37 PM EST | Dense Fog Advisory | BOX | 17 hr |
| Dec 15, 3:51 PM EST | Winter Weather Advisory | BOX | 37 hr |
| Dec 17, 10:51 PM EST | Special Weather Statement | BOX | 54 min |
| Dec 19, 3:18 PM EST | Flood Watch | BOX | 58 hr |
| Dec 21, 9:36 AM EST | Areal Flood Advisory | BOX | 3 hr |
| Dec 21, 12:13 PM EST | Areal Flood Warning | BOX | 3 hr |
| Dec 21, 12:17 PM EST | River Flood Warning | BOX | 16 hr |
| Dec 21, 12:17 PM EST | River Flood Warning | BOX | 24 hr |
| Dec 21, 3:13 PM EST | Areal Flood Warning | BOX | 5 hr |
| Dec 22, 3:46 AM EST | Wind Advisory | BOX | 15 hr |
| Dec 26, 2:53 PM EST | Winter Weather Advisory | BOX | 44 hr |
| Dec 28, 10:06 PM EST | Dense Fog Advisory | BOX | 8 hr |
| Dec 30, 3:11 PM EST | Winter Weather Advisory | BOX | 34 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 archive20172019
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.