Alert archive / New Hampshire / Carroll County

Weather alerts in Carroll County, New Hampshire, 2012

156 weather alerts in 2012, 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 2012. Tap one for its archive.

Alerts: 156
Warnings: 49
Watches: 20
Advisories: 45
Busiest month: July25 alerts
Busiest day: May 29, 201216 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, 2012

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	27	17	37%	9	78%	26 min
Flash flood warnings	4	1	75%	2	0%

Each office's whole area, 2012

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Gray, ME: tornado warnings	0			1	0%
NWS Gray, ME: severe thunderstorm warnings	86	60	30%	153	86%	21 min
NWS Gray, ME: flash flood warnings	15	1	93%	9	11%	29 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
Dec 31, 8:32 PM EST	Dense Fog Advisory	GYX	4 hr
Jan 2, 9:20 PM EST	Special Weather Statement	GYX	85 min
Jan 10, 3:04 PM EST	Winter Storm Watch	GYX	24 hr
Jan 11, 3:32 PM EST	Winter Storm Warning	GYX	28 hr
Jan 12, 11:19 AM EST	Mesoscale Discussion	SPC	5 hr
Jan 13, 3:19 AM EST	Freezing Rain Advisory	GYX	10 hr
Jan 14, 1:29 PM EST	Wind Chill Advisory	GYX	19 hr
Jan 17, 3:09 AM EST	Winter Weather Advisory	GYX	28 hr
Jan 17, 3:15 PM EST	Wind Advisory	GYX	21 hr
Jan 22, 3:24 PM EST	Winter Weather Advisory	GYX	18 hr
Jan 23, 3:42 AM EST	Winter Weather Advisory	GYX	22 hr
Jan 26, 2:57 AM EST	Winter Storm Warning	GYX	36 hr
Jan 26, 2:57 AM EST	Winter Weather Advisory	GYX	35 hr
Jan 30, 1:16 AM EST	Winter Weather Advisory	GYX	5 hr
Jan 31, 2:03 AM EST	Winter Weather Advisory	GYX	36 hr
Feb 23, 3:15 PM EST	Winter Weather Advisory	GYX	39 hr
Feb 24, 3:46 AM EST	Winter Storm Warning	GYX	27 hr
Feb 24, 3:46 AM EST	Winter Weather Advisory	GYX	21 hr
Feb 25, 3:33 AM EST	Wind Advisory	GYX	12 hr
Feb 28, 3:56 PM EST	Winter Storm Watch	GYX	23 hr
Feb 29, 4:29 AM EST	Winter Storm Warning	GYX	41 hr
Mar 2, 2:26 PM EST	Winter Weather Advisory	GYX	20 hr
Mar 16, 1:13 AM EDT	Freezing Rain Advisory	GYX	14 hr
Apr 22, 3:20 AM EDT	Flood Watch	GYX	39 hr
May 16, 1:18 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
May 16, 6:36 PM EDT	Mesoscale Discussion	SPC	84 min
May 16, 8:42 PM EDT	Mesoscale Discussion	SPC	63 min
May 17, 3:06 AM EDT	Frost Advisory	GYX	27 hr
May 29, 1:14 AM EDT	Special Weather Statement	GYX	46 min
May 29, 1:40 AM EDT	Special Weather Statement	GYX	50 min
May 29, 2:01 AM EDT	Severe Thunderstorm Warning	GYX	44 min
May 29, 2:24 AM EDT	Areal Flood Advisory	GYX	2 hr
May 29, 2:31 AM EDT	Special Weather Statement	GYX	44 min
May 29, 2:39 AM EDT	Severe Thunderstorm Warning	GYX	40 min
May 29, 3:18 AM EDT	Special Weather Statement	GYX	42 min
May 29, 3:45 AM EDT	Special Weather Statement	GYX	60 min
May 29, 6:43 AM EDT	Flash Flood Watch	GYX	17 hr
May 29, 8:52 AM EDT	Special Weather Statement	GYX	38 min
May 29, 9:38 AM EDT	Special Weather Statement	GYX	52 min
May 29, 2:49 PM EDT	Mesoscale Discussion	SPC	56 min
May 29, 3:44 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
May 29, 4:50 PM EDT	Severe Thunderstorm Warning	GYX	55 min
May 29, 4:51 PM EDT	Flash Flood Warning	GYX	6 hr
May 29, 5:43 PM EDT	Special Weather Statement	GYX	47 min
Jun 1, 11:56 AM EDT	Flood Watch	GYX	40 hr
Jun 2, 8:34 PM EDT	Areal Flood Warning	GYX	10 hr
Jun 2, 9:39 PM EDT	River Flood Warning	GYX	20 hr
Jun 4, 7:49 AM EDT	Areal Flood Warning	GYX	8 hr
Jun 4, 12:02 PM EDT	Areal Flood Warning	GYX	8 hr
Jun 4, 3:41 PM EDT	Areal Flood Advisory	GYX	8 hr
Jun 4, 8:01 PM EDT	Areal Flood Advisory	GYX	12 hr
Jun 8, 8:02 PM EDT	Severe Thunderstorm Warning	GYX	43 min
Jun 8, 8:45 PM EDT	Severe Thunderstorm Warning	GYX	45 min
Jun 8, 8:58 PM EDT	Severe Thunderstorm Warning	GYX	62 min
Jun 19, 3:13 PM EDT	Heat Advisory	GYX	28 hr
Jun 20, 7:22 PM EDT	Heat Advisory	GYX	24 hr
Jun 23, 11:42 AM EDT	Mesoscale Discussion	SPC	3 hr
Jun 23, 12:01 PM EDT	Flash Flood Watch	GYX	8 hr
Jun 23, 12:37 PM EDT	Areal Flood Advisory	GYX	3 hr
Jun 23, 1:14 PM EDT	Flash Flood Warning	GYX	4 hr
Jun 23, 1:41 PM EDT	Special Weather Statement	GYX	49 min
Jun 25, 12:10 PM EDT	Areal Flood Advisory	GYX	3 hr
Jun 25, 12:46 PM EDT	Special Weather Statement	GYX	89 min
Jun 25, 9:00 PM EDT	Special Weather Statement	GYX	30 min
Jun 26, 8:42 AM EDT	Flash Flood Watch	GYX	12 hr
Jul 1, 3:52 PM EDT	Special Weather Statement	GYX	38 min
Jul 1, 6:04 PM EDT	Special Weather Statement	GYX	26 min
Jul 4, 4:48 PM EDT	Mesoscale Discussion	SPC	57 min
Jul 4, 5:08 PM EDT	Severe Thunderstorm Warning	GYX	67 min
Jul 4, 6:08 PM EDT	Severe Thunderstorm Warning	GYX	67 min
Jul 4, 6:10 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Jul 4, 6:38 PM EDT	Severe Thunderstorm Warning	GYX	67 min
Jul 17, 1:23 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 17, 3:32 PM EDT	Mesoscale Discussion	SPC	58 min
Jul 17, 5:21 PM EDT	Severe Thunderstorm Warning	GYX	39 min
Jul 17, 5:59 PM EDT	Severe Thunderstorm Warning	GYX	46 min
Jul 17, 6:30 PM EDT	Mesoscale Discussion	SPC	60 min
Jul 17, 6:40 PM EDT	Severe Thunderstorm Warning	GYX	50 min
Jul 17, 6:44 PM EDT	Severe Thunderstorm Warning	GYX	61 min
Jul 17, 7:21 PM EDT	Severe Thunderstorm Warning	GYX	54 min
Jul 17, 11:49 PM EDT	Severe Thunderstorm Warning	GYX	41 min
Jul 18, 12:29 AM EDT	Severe Thunderstorm Warning	GYX	46 min
Jul 18, 12:45 AM EDT	Special Weather Statement	GYX	30 min
Jul 23, 7:16 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 23, 8:57 PM EDT	Severe Thunderstorm Warning	GYX	33 min
Jul 23, 9:30 PM EDT	Severe Thunderstorm Warning	GYX	45 min
Jul 23, 11:44 PM EDT	Severe Thunderstorm Warning	GYX	46 min
Jul 24, 2:29 AM EDT	Mesoscale Discussion	SPC	31 min
Jul 28, 5:33 PM EDT	Areal Flood Warning	GYX	3 hr
Jul 30, 2:13 PM EDT	Areal Flood Advisory	GYX	112 min
Aug 5, 3:41 PM EDT	Mesoscale Discussion	SPC	94 min
Aug 5, 4:20 PM EDT	Special Weather Statement	GYX	40 min
Aug 5, 4:35 PM EDT	Severe Thunderstorm Warning	GYX	55 min
Aug 5, 4:56 PM EDT	Severe Thunderstorm Warning	GYX	64 min
Aug 10, 12:20 PM EDT	Flash Flood Watch	GYX	10 hr
Aug 10, 2:03 PM EDT	Special Weather Statement	GYX	57 min
Aug 10, 5:23 PM EDT	Areal Flood Advisory	GYX	112 min
Aug 10, 6:18 PM EDT	Areal Flood Advisory	GYX	3 hr
Aug 10, 6:53 PM EDT	Special Weather Statement	GYX	52 min
Aug 12, 5:14 PM EDT	Areal Flood Advisory	GYX	2 hr
Aug 12, 6:04 PM EDT	Special Weather Statement	GYX	11 min
Aug 12, 6:12 PM EDT	Severe Thunderstorm Warning	GYX	48 min
Aug 12, 6:49 PM EDT	Special Weather Statement	GYX	26 min
Aug 16, 4:23 AM EDT	Flash Flood Warning	GYX	3 hr
Aug 17, 6:18 PM EDT	Special Weather Statement	GYX	27 min
Aug 25, 7:32 AM EDT	Dense Fog Advisory	GYX	88 min
Aug 31, 5:18 PM EDT	Severe Thunderstorm Warning	GYX	27 min
Sep 7, 7:11 AM EDT	Dense Fog Advisory	GYX	109 min
Sep 8, 3:55 PM EDT	Mesoscale Discussion	SPC	65 min
Sep 8, 4:47 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 8, 5:18 PM EDT	Special Weather Statement	GYX	27 min
Sep 8, 5:52 PM EDT	Special Weather Statement	GYX	23 min
Sep 8, 6:15 PM EDT	Severe Thunderstorm Warning	GYX	60 min
Sep 8, 7:15 PM EDT	Severe Thunderstorm Warning	GYX	60 min
Sep 8, 7:53 PM EDT	Mesoscale Discussion	SPC	97 min
Sep 8, 8:13 PM EDT	Severe Thunderstorm Warning	GYX	62 min
Sep 11, 6:37 PM EDT	Frost Advisory	GYX	8 hr
Sep 15, 2:57 AM EDT	Frost Advisory	GYX	27 hr
Sep 16, 2:37 PM EDT	Frost Advisory	GYX	16 hr
Sep 18, 3:27 AM EDT	Wind Advisory	GYX	24 hr
Sep 18, 11:58 PM EDT	Areal Flood Advisory	GYX	3 hr
Sep 19, 3:40 AM EDT	Frost Advisory	GYX	27 hr
Sep 19, 3:40 AM EDT	Freeze Warning	GYX	27 hr
Sep 19, 7:12 AM EDT	River Flood Warning	GYX	4 hr
Sep 24, 2:09 PM EDT	Frost Advisory	GYX	17 hr
Sep 27, 3:11 PM EDT	Frost Advisory	GYX	16 hr
Oct 11, 3:04 PM EDT	Freeze Watch	GYX	12 hr
Oct 12, 3:14 AM EDT	Freeze Warning	GYX	31 hr
Oct 19, 7:36 PM EDT	Special Weather Statement	GYX	39 min
Oct 27, 4:10 PM EDT	High Wind Watch	GYX	23 hr
Oct 28, 3:07 PM EDT	Flood Watch	GYX	69 hr
Oct 28, 3:14 PM EDT	High Wind Warning	GYX	36 hr
Oct 30, 12:32 AM EDT	Areal Flood Warning	GYX	8 hr
Oct 30, 1:49 AM EDT	Flash Flood Warning	GYX	5 hr
Oct 30, 3:03 AM EDT	River Flood Warning	GYX	27 hr
Oct 30, 5:51 AM EDT	Mesoscale Discussion	SPC	114 min
Oct 30, 6:53 PM EDT	Special Weather Statement	GYX	52 min
Oct 30, 9:13 PM EDT	Severe Thunderstorm Warning	GYX	47 min
Oct 30, 9:41 PM EDT	Mesoscale Discussion	SPC	64 min
Oct 30, 9:53 PM EDT	Special Weather Statement	GYX	67 min
Oct 30, 10:20 PM EDT	Areal Flood Warning	GYX	12 hr
Nov 7, 3:36 AM EST	Winter Weather Advisory	GYX	29 hr
Dec 1, 3:26 AM EST	Winter Weather Advisory	GYX	34 hr
Dec 4, 12:49 PM EST	Dense Fog Advisory	GYX	111 min
Dec 4, 5:11 PM EST	Dense Fog Advisory	GYX	7 hr
Dec 9, 3:38 PM EST	Winter Weather Advisory	GYX	23 hr
Dec 15, 3:28 AM EST	Winter Storm Watch	GYX	25 hr
Dec 16, 4:06 AM EST	Winter Storm Warning	GYX	3 days
Dec 16, 4:06 AM EST	Winter Weather Advisory	GYX	56 hr
Dec 17, 3:35 AM EST	Winter Storm Watch	GYX	12 hr
Dec 20, 3:05 PM EST	Wind Advisory	GYX	30 hr
Dec 25, 4:05 AM EST	Winter Storm Watch	GYX	34 hr
Dec 25, 3:19 PM EST	Winter Storm Warning	GYX	57 hr
Dec 26, 8:22 PM EST	Mesoscale Discussion	SPC	6 hr
Dec 27, 3:52 AM EST	Mesoscale Discussion	SPC	6 hr
Dec 29, 3:29 AM EST	Winter Weather Advisory	GYX	24 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	27
Severe Thunderstorm Watch	6
Mesoscale Discussion	16
Special Weather Statement	26
Flooding
Areal Flood Warning	6
Flash Flood Warning	4
River Flood Warning	3
Flash Flood Watch	4
Flood Watch	3
Areal Flood Advisory	10
Winter
Winter Storm Warning	6
Winter Storm Watch	5
Freezing Rain Advisory	2
Winter Weather Advisory	14
Heat
Heat Advisory	2
Cold
Freeze Warning	2
Freeze Watch	1
Frost Advisory	7
Wind Chill Advisory	1
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	4
Fog and smoke
Dense Fog Advisory	5

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2011 2013

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.