Alert archive / Connecticut / Capitol Planning Region
Weather alerts in Capitol Planning Region, Connecticut, 2021
111 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Capitol Planning Region and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 111
- Warnings
- 59
- Watches
- 24
- Advisories
- 28
- Busiest month
- July28 alerts
- Busiest day
- July 7, 20215 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 1 tornado warnings covering Capitol Planning Region in 2021 had a tornado report inside them.
Capitol Planning Region, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 0 | ||
| Severe thunderstorm warnings | 26 | 16 | 38% | 0 | ||
| Flash flood warnings | 10 | 0 | 100% | 0 |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boston/Norton, MA: tornado warnings | 23 | 6 | 74% | 14 | 50% | 18 min |
| NWS Boston/Norton, MA: severe thunderstorm warnings | 131 | 84 | 36% | 358 | 80% | 27 min |
| NWS Boston/Norton, MA: flash flood warnings | 38 | 1 | 97% | 5 | 60% | 141 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 2, 3:56 PM EST | Winter Weather Advisory | BOX | 35 hr |
| Jan 25, 3:02 PM EST | Winter Weather Advisory | BOX | 37 hr |
| Jan 28, 3:32 AM EST | Wind Chill Advisory | BOX | 32 hr |
| Jan 30, 3:28 PM EST | Winter Storm Watch | BOX | 24 hr |
| Jan 31, 3:37 PM EST | Winter Storm Warning | BOX | 37 hr |
| Feb 2, 4:07 AM EST | Winter Weather Advisory | BOX | 11 hr |
| Feb 5, 3:27 PM EST | Winter Storm Watch | BOX | 24 hr |
| Feb 6, 3:27 PM EST | Winter Weather Advisory | BOX | 30 hr |
| Feb 8, 2:56 PM EST | Winter Weather Advisory | BOX | 28 hr |
| Feb 14, 3:31 PM EST | Winter Storm Watch | BOX | 12 hr |
| Feb 15, 3:54 AM EST | Winter Weather Advisory | BOX | 31 hr |
| Feb 16, 3:38 PM EST | Winter Storm Watch | BOX | 24 hr |
| Feb 17, 3:37 PM EST | Winter Weather Advisory | BOX | 56 hr |
| Feb 28, 3:01 PM EST | Wind Advisory | BOX | 48 hr |
| Mar 12, 2:53 AM EST | Wind Advisory | BOX | 28 hr |
| Mar 12, 1:30 PM EST | Red Flag Warning | BOX | 28 hr |
| Mar 13, 3:42 PM EST | Wind Advisory | BOX | 35 hr |
| Mar 14, 3:10 AM EDT | Red Flag Warning | BOX | 17 hr |
| Mar 15, 10:48 AM EDT | Red Flag Warning | BOX | 10 hr |
| Mar 25, 3:57 PM EDT | Wind Advisory | BOX | 36 hr |
| Mar 28, 3:34 AM EDT | Wind Advisory | BOX | 36 hr |
| Apr 11, 2:39 AM EDT | Dense Fog Advisory | BOX | 7 hr |
| Apr 21, 12:28 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 21, 3:17 PM EDT | Severe Thunderstorm Warning | BOX | 58 min |
| Apr 21, 4:13 PM EDT | Freeze Warning | BOX | 14 hr |
| Apr 22, 4:08 PM EDT | Freeze Warning | BOX | 12 hr |
| Apr 29, 3:24 PM EDT | Wind Advisory | BOX | 35 hr |
| May 26, 3:56 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 26, 7:05 PM EDT | Severe Thunderstorm Warning | BOX | 55 min |
| May 26, 7:40 PM EDT | Severe Thunderstorm Warning | BOX | 65 min |
| May 26, 7:45 PM EDT | Severe Thunderstorm Warning | BOX | 60 min |
| Jun 4, 5:53 PM EDT | Severe Thunderstorm Warning | BOX | 37 min |
| Jun 6, 3:29 AM EDT | Heat Advisory | BOX | 64 hr |
| Jun 8, 12:54 PM EDT | Flash Flood Watch | BOX | 8 hr |
| Jun 8, 2:29 PM EDT | Severe Thunderstorm Warning | BOX | 61 min |
| Jun 8, 2:56 PM EDT | Severe Thunderstorm Warning | BOX | 43 min |
| Jun 9, 3:12 AM EDT | Heat Advisory | BOX | 17 hr |
| Jun 9, 3:23 PM EDT | Severe Thunderstorm Warning | BOX | 67 min |
| Jun 26, 3:15 PM EDT | Heat Advisory | BOX | 4 days |
| Jun 29, 6:48 PM EDT | Severe Thunderstorm Warning | BOX | 57 min |
| Jun 29, 6:59 PM EDT | Severe Thunderstorm Warning | BOX | 44 min |
| Jun 29, 7:34 PM EDT | Severe Thunderstorm Warning | BOX | 56 min |
| Jun 30, 3:21 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 6:45 PM EDT | Severe Thunderstorm Warning | BOX | 60 min |
| Jul 6, 3:33 AM EDT | Heat Advisory | BOX | 39 hr |
| Jul 6, 1:13 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 4:20 PM EDT | Severe Thunderstorm Warning | BOX | 55 min |
| Jul 6, 5:00 PM EDT | Severe Thunderstorm Warning | BOX | 60 min |
| Jul 7, 2:41 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 7, 4:00 PM EDT | Severe Thunderstorm Warning | BOX | 60 min |
| Jul 7, 4:50 PM EDT | Severe Thunderstorm Warning | BOX | 55 min |
| Jul 7, 5:30 PM EDT | Severe Thunderstorm Warning | BOX | 60 min |
| Jul 7, 6:38 PM EDT | Severe Thunderstorm Warning | BOX | 43 min |
| Jul 8, 4:20 AM EDT | Flash Flood Watch | BOX | 36 hr |
| Jul 8, 2:09 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 9, 8:19 AM EDT | Flash Flood Warning | BOX | 6 hr |
| Jul 9, 2:24 PM EDT | Areal Flood Warning | BOX | 8 hr |
| Jul 9, 9:40 PM EDT | Areal Flood Warning | BOX | 33 hr |
| Jul 9, 10:57 PM EDT | Areal Flood Warning | BOX | 3 hr |
| Jul 11, 3:34 PM EDT | Flash Flood Watch | BOX | 21 hr |
| Jul 16, 2:59 PM EDT | Flash Flood Watch | BOX | 56 hr |
| Jul 16, 5:31 PM EDT | Severe Thunderstorm Warning | BOX | 42 min |
| Jul 17, 1:13 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 17, 4:38 PM EDT | Severe Thunderstorm Warning | BOX | 67 min |
| Jul 17, 4:58 PM EDT | Flash Flood Warning | BOX | 2 hr |
| Jul 17, 5:21 PM EDT | Flash Flood Warning | BOX | 5 hr |
| Jul 18, 1:39 AM EDT | Areal Flood Warning | BOX | 2 hr |
| Jul 18, 2:48 AM EDT | Areal Flood Warning | BOX | 105 min |
| Jul 18, 9:33 AM EDT | Areal Flood Warning | BOX | 5 hr |
| Jul 21, 11:56 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 27, 2:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 27, 5:34 PM EDT | Severe Thunderstorm Warning | BOX | 56 min |
| Aug 10, 3:22 AM EDT | Excessive Heat Watch | BOX | 60 hr |
| Aug 10, 3:22 AM EDT | Heat Advisory | BOX | 41 hr |
| Aug 11, 3:28 PM EDT | Excessive Heat Warning | BOX | 29 hr |
| Aug 12, 2:53 PM EDT | Heat Advisory | BOX | 29 hr |
| Aug 12, 5:35 PM EDT | Severe Thunderstorm Warning | BOX | 55 min |
| Aug 12, 6:26 PM EDT | Severe Thunderstorm Warning | BOX | 49 min |
| Aug 19, 7:32 AM EDT | Areal Flood Warning | BOX | 5 hr |
| Aug 19, 8:14 AM EDT | Flash Flood Warning | BOX | 3 hr |
| Aug 20, 11:09 PM EDT | Tropical Storm Warning | BOX | 42 hr |
| Aug 21, 4:16 AM EDT | Flood Watch | BOX | 64 hr |
| Aug 22, 1:28 PM EDT | Flash Flood Warning | BOX | 4 hr |
| Aug 22, 1:37 PM EDT | Flash Flood Warning | BOX | 4 hr |
| Aug 22, 1:53 PM EDT | Flash Flood Warning | BOX | 4 hr |
| Aug 22, 4:11 PM EDT | Areal Flood Warning | BOX | 4 hr |
| Aug 22, 8:45 PM EDT | Areal Flood Warning | BOX | 9 hr |
| Aug 23, 11:52 AM EDT | Flash Flood Warning | BOX | 3 hr |
| Aug 23, 3:36 PM EDT | Areal Flood Warning | BOX | 6 hr |
| Aug 25, 2:55 PM EDT | Heat Advisory | BOX | 29 hr |
| Aug 26, 3:44 PM EDT | Heat Advisory | BOX | 27 hr |
| Aug 27, 4:59 PM EDT | Severe Thunderstorm Warning | BOX | 38 min |
| Aug 30, 3:12 PM EDT | Flash Flood Watch | BOX | 65 hr |
| Sep 1, 7:57 PM EDT | Flash Flood Warning | BOX | 12 hr |
| Sep 2, 1:51 AM EDT | River Flood Warning | BOX | 26 hr |
| Sep 2, 1:51 AM EDT | River Flood Warning | BOX | 66 hr |
| Sep 2, 1:51 AM EDT | River Flood Warning | BOX | 45 hr |
| Sep 2, 7:25 AM EDT | Flash Flood Warning | BOX | 6 hr |
| Sep 2, 1:28 PM EDT | Areal Flood Warning | BOX | 6 hr |
| Sep 9, 3:50 AM EDT | Tornado Warning | BOX | 25 min |
| Sep 15, 3:43 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 23, 2:48 PM EDT | Flash Flood Watch | BOX | 19 hr |
| Oct 25, 3:47 AM EDT | Flood Watch | BOX | 52 hr |
| Nov 13, 12:27 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Nov 13, 4:09 PM EST | Severe Thunderstorm Warning | BOX | 15 min |
| Dec 10, 3:45 PM EST | Wind Advisory | BOX | 36 hr |
| Dec 11, 10:21 PM EST | Severe Thunderstorm Warning | BOX | 39 min |
| Dec 21, 3:26 AM EST | Winter Weather Advisory | BOX | 32 hr |
| Dec 24, 3:39 AM EST | Winter Weather Advisory | BOX | 49 hr |
| Dec 27, 3:14 AM EST | Winter Weather Advisory | BOX | 30 hr |
| Dec 30, 9:25 PM EST | Dense Fog Advisory | BOX | 13 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 | 26 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 11 |
| Flooding | |
| Areal Flood Warning | 11 |
| Flash Flood Warning | 10 |
| River Flood Warning | 3 |
| Flash Flood Watch | 6 |
| Flood Watch | 2 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 10 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 8 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fire | |
| Red Flag Warning | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
| Tropical | |
| Tropical Storm Warning | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.