Alert archive / New Hampshire / Carroll County
Weather alerts in Carroll County, New Hampshire, 2011
170 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Carroll County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 170
- Warnings
- 50
- Watches
- 33
- Advisories
- 33
- Busiest month
- August29 alerts
- Busiest day
- June 1, 201110 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Carroll County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 25 | 22 | 12% | 16 | 100% | 25 min |
| Flash flood warnings | 4 | 3 | 25% | 8 | 75% | 202 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gray, ME: tornado warnings | 5 | 2 | 60% | 2 | 100% | 11 min |
| NWS Gray, ME: severe thunderstorm warnings | 159 | 136 | 14% | 296 | 89% | 23 min |
| NWS Gray, ME: flash flood warnings | 11 | 5 | 55% | 32 | 81% | 157 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 10, 3:16 PM EST | Winter Storm Watch | GYX | 12 hr |
| Jan 11, 3:10 AM EST | Winter Storm Warning | GYX | 42 hr |
| Jan 11, 3:10 AM EST | Winter Weather Advisory | GYX | 30 hr |
| Jan 12, 6:27 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 17, 3:40 AM EST | Winter Storm Watch | GYX | 11 hr |
| Jan 17, 3:08 PM EST | Winter Storm Warning | GYX | 35 hr |
| Jan 18, 12:37 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 20, 2:53 PM EST | Winter Weather Advisory | GYX | 23 hr |
| Jan 23, 3:08 PM EST | Wind Chill Warning | GYX | 22 hr |
| Jan 31, 2:48 PM EST | Winter Storm Watch | GYX | 13 hr |
| Feb 1, 3:58 AM EST | Winter Storm Warning | GYX | 41 hr |
| Feb 2, 2:57 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 2, 10:00 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 4, 3:26 PM EST | Winter Storm Watch | GYX | 12 hr |
| Feb 5, 3:37 AM EST | Winter Storm Warning | GYX | 26 hr |
| Feb 5, 3:37 AM EST | Winter Weather Advisory | GYX | 26 hr |
| Feb 5, 4:45 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 5, 9:02 PM EST | Mesoscale Discussion | SPC | 118 min |
| Feb 7, 3:32 PM EST | Winter Weather Advisory | GYX | 19 hr |
| Feb 14, 3:04 PM EST | Wind Advisory | GYX | 19 hr |
| Feb 23, 3:37 PM EST | Winter Storm Watch | GYX | 13 hr |
| Feb 24, 4:21 AM EST | Winter Storm Warning | GYX | 42 hr |
| Feb 25, 4:28 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 25, 12:36 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 27, 3:43 PM EST | Winter Storm Warning | GYX | 23 hr |
| Feb 27, 3:43 PM EST | Winter Weather Advisory | GYX | 23 hr |
| Mar 5, 3:30 PM EST | Winter Storm Watch | GYX | 12 hr |
| Mar 6, 3:39 AM EST | Winter Storm Warning | GYX | 36 hr |
| Mar 6, 12:59 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 6, 7:32 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 7, 7:24 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 10, 3:48 AM EST | Flood Watch | GYX | 57 hr |
| Mar 10, 3:59 AM EST | Winter Weather Advisory | GYX | 30 hr |
| Mar 11, 10:08 AM EST | Areal Flood Advisory | GYX | 3 hr |
| Mar 17, 3:03 PM EDT | Wind Advisory | GYX | 29 hr |
| Mar 20, 3:26 PM EDT | Winter Storm Warning | GYX | 23 hr |
| Mar 20, 3:26 PM EDT | Winter Weather Advisory | GYX | 43 hr |
| Mar 30, 5:06 AM EDT | Winter Storm Watch | GYX | 23 hr |
| Mar 31, 3:44 AM EDT | Winter Storm Warning | GYX | 40 hr |
| Apr 11, 3:30 AM EDT | Flood Watch | GYX | 64 hr |
| Apr 11, 8:23 AM EDT | Severe Thunderstorm Warning | GYX | 52 min |
| Apr 11, 9:14 AM EDT | Special Weather Statement | GYX | 61 min |
| Apr 12, 3:47 PM EDT | Winter Weather Advisory | GYX | 24 hr |
| Apr 15, 3:11 PM EDT | Flood Watch | GYX | 53 hr |
| Apr 16, 3:40 AM EDT | Wind Advisory | GYX | 32 hr |
| Apr 21, 8:46 AM EDT | Wind Advisory | GYX | 11 hr |
| Apr 27, 3:16 PM EDT | Flood Watch | GYX | 29 hr |
| May 7, 1:06 PM EDT | Special Weather Statement | GYX | 39 min |
| May 14, 3:32 PM EDT | Flood Watch | GYX | 44 hr |
| May 19, 5:46 AM EDT | Areal Flood Advisory | GYX | 119 min |
| May 27, 1:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 27, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 27, 5:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 27, 8:14 PM EDT | Severe Thunderstorm Warning | GYX | 46 min |
| May 30, 2:56 AM EDT | Flash Flood Warning | GYX | 3 hr |
| Jun 1, 7:42 AM EDT | Special Weather Statement | GYX | 48 min |
| Jun 1, 8:07 AM EDT | Severe Thunderstorm Warning | GYX | 23 min |
| Jun 1, 12:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 1, 12:58 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 1, 2:12 PM EDT | Severe Thunderstorm Warning | GYX | 48 min |
| Jun 1, 2:57 PM EDT | Severe Thunderstorm Warning | GYX | 33 min |
| Jun 1, 3:28 PM EDT | Severe Thunderstorm Warning | GYX | 47 min |
| Jun 1, 4:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 1, 7:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 1, 7:40 PM EDT | Tornado Watch | SPC | 2 hr |
| Jun 1, 9:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 3, 3:16 PM EDT | Frost Advisory | GYX | 12 hr |
| Jun 8, 6:45 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 9, 12:06 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 9, 3:00 PM EDT | Severe Thunderstorm Warning | GYX | 60 min |
| Jun 9, 3:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 9, 3:38 PM EDT | Severe Thunderstorm Warning | GYX | 67 min |
| Jun 9, 7:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 18, 4:41 PM EDT | Special Weather Statement | GYX | 49 min |
| Jun 18, 4:43 PM EDT | Severe Thunderstorm Warning | GYX | 36 min |
| Jun 18, 5:17 PM EDT | Severe Thunderstorm Warning | GYX | 43 min |
| Jul 4, 11:31 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 4, 12:10 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 4, 1:07 PM EDT | Special Weather Statement | GYX | 38 min |
| Jul 4, 1:11 PM EDT | Severe Thunderstorm Warning | GYX | 49 min |
| Jul 4, 1:53 PM EDT | Severe Thunderstorm Warning | GYX | 27 min |
| Jul 4, 2:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 6, 1:04 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 6, 1:29 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 6, 4:12 PM EDT | Severe Thunderstorm Warning | GYX | 63 min |
| Jul 6, 5:35 PM EDT | Severe Thunderstorm Warning | GYX | 40 min |
| Jul 6, 6:00 PM EDT | Severe Thunderstorm Warning | GYX | 45 min |
| Jul 6, 6:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 6, 6:31 PM EDT | Special Weather Statement | GYX | 29 min |
| Jul 13, 6:33 PM EDT | Special Weather Statement | GYX | 42 min |
| Jul 18, 7:26 PM EDT | Special Weather Statement | GYX | 49 min |
| Jul 21, 3:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 21, 8:08 PM EDT | Heat Advisory | GYX | 22 hr |
| Jul 26, 11:05 AM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 26, 1:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 26, 2:29 PM EDT | Severe Thunderstorm Warning | GYX | 46 min |
| Jul 26, 2:30 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 26, 3:14 PM EDT | Severe Thunderstorm Warning | GYX | 17 min |
| Jul 26, 4:53 PM EDT | Areal Flood Advisory | GYX | 82 min |
| Jul 26, 5:22 PM EDT | Severe Thunderstorm Warning | GYX | 38 min |
| Jul 26, 5:24 PM EDT | Flash Flood Warning | GYX | 3 hr |
| Jul 26, 5:39 PM EDT | Severe Thunderstorm Warning | GYX | 36 min |
| Jul 26, 6:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 26, 8:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Aug 1, 2:15 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 1, 2:27 PM EDT | Special Weather Statement | GYX | 33 min |
| Aug 2, 10:42 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Aug 2, 11:31 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 2, 12:16 PM EDT | Special Weather Statement | GYX | 29 min |
| Aug 2, 2:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Aug 15, 12:25 PM EDT | Flood Watch | GYX | 10 hr |
| Aug 19, 3:13 PM EDT | Special Weather Statement | GYX | 62 min |
| Aug 19, 4:19 PM EDT | Severe Thunderstorm Warning | GYX | 56 min |
| Aug 19, 4:42 PM EDT | Severe Thunderstorm Warning | GYX | 48 min |
| Aug 19, 5:41 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Aug 21, 1:20 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 21, 3:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 21, 3:24 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 21, 3:30 PM EDT | Severe Thunderstorm Warning | GYX | 45 min |
| Aug 21, 4:00 PM EDT | Severe Thunderstorm Warning | GYX | 45 min |
| Aug 21, 4:36 PM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| Aug 21, 7:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Aug 21, 8:59 PM EDT | Special Weather Statement | GYX | 46 min |
| Aug 22, 12:38 AM EDT | Areal Flood Advisory | GYX | 112 min |
| Aug 26, 3:03 PM EDT | Flood Watch | GYX | 57 hr |
| Aug 26, 5:17 PM EDT | Tropical Storm Watch | GYX | 18 hr |
| Aug 27, 11:40 AM EDT | Tropical Storm Warning | GYX | 36 hr |
| Aug 28, 9:47 AM EDT | Areal Flood Warning | GYX | 12 hr |
| Aug 28, 10:56 AM EDT | Special Weather Statement | GYX | 34 min |
| Aug 28, 1:16 PM EDT | River Flood Warning | GYX | 26 hr |
| Aug 28, 1:35 PM EDT | Flash Flood Warning | GYX | 6 hr |
| Aug 28, 6:35 PM EDT | Flash Flood Warning | GYX | 6 hr |
| Aug 29, 12:31 AM EDT | Areal Flood Warning | GYX | 8 hr |
| Sep 4, 3:46 AM EDT | Flood Watch | GYX | 18 hr |
| Sep 4, 1:01 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 4, 4:07 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Sep 4, 9:23 PM EDT | Flash Flood Watch | GYX | 29 hr |
| Sep 4, 9:40 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Sep 5, 5:20 AM EDT | Special Weather Statement | GYX | 40 min |
| Sep 5, 5:31 AM EDT | Severe Thunderstorm Warning | GYX | 44 min |
| Sep 5, 6:14 AM EDT | Special Weather Statement | GYX | 46 min |
| Sep 5, 6:55 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Sep 16, 3:06 AM EDT | Frost Advisory | GYX | 29 hr |
| Sep 16, 3:06 AM EDT | Freeze Warning | GYX | 29 hr |
| Sep 17, 2:56 PM EDT | Frost Advisory | GYX | 17 hr |
| Sep 29, 6:44 PM EDT | Special Weather Statement | GYX | 46 min |
| Sep 29, 7:53 PM EDT | Areal Flood Advisory | GYX | 112 min |
| Oct 2, 4:02 AM EDT | Flood Watch | GYX | 11 hr |
| Oct 5, 3:14 AM EDT | Frost Advisory | GYX | 28 hr |
| Oct 5, 3:14 AM EDT | Freeze Warning | GYX | 28 hr |
| Oct 6, 4:16 AM EDT | Frost Advisory | GYX | 28 hr |
| Oct 6, 1:19 PM EDT | Freeze Warning | GYX | 19 hr |
| Oct 13, 3:15 PM EDT | Flood Watch | GYX | 36 hr |
| Oct 15, 2:10 AM EDT | River Flood Warning | GYX | 9 hr |
| Oct 28, 3:45 AM EDT | Winter Storm Watch | GYX | 22 hr |
| Oct 29, 1:53 AM EDT | Winter Storm Warning | GYX | 32 hr |
| Oct 29, 7:49 PM EDT | Mesoscale Discussion | SPC | 5 hr |
| Nov 21, 3:00 PM EST | Winter Storm Watch | GYX | 13 hr |
| Nov 22, 3:57 AM EST | Winter Storm Warning | GYX | 35 hr |
| Nov 22, 10:08 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Nov 23, 7:48 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Nov 30, 7:20 AM EST | River Flood Warning | GYX | 9 hr |
| Dec 7, 2:52 PM EST | Winter Weather Advisory | GYX | 16 hr |
| Dec 7, 10:25 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 14, 3:09 PM EST | Winter Weather Advisory | GYX | 21 hr |
| Dec 15, 3:55 PM EST | Wind Advisory | GYX | 23 hr |
| Dec 21, 3:58 AM EST | Winter Weather Advisory | GYX | 23 hr |
| Dec 21, 3:28 PM EST | Winter Weather Advisory | GYX | 6 hr |
| Dec 22, 9:51 PM EST | Winter Weather Advisory | GYX | 5 hr |
| Dec 30, 3:36 AM EST | Winter Weather Advisory | GYX | 35 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 archive20102012
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.