Alert archive / New Hampshire / Carroll County

Weather alerts in Carroll County, New Hampshire, 2017

192 weather alerts in 2017, 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 2017. Tap one for its archive.

Alerts: 192
Warnings: 59
Watches: 21
Advisories: 52
Busiest month: July33 alerts
Busiest day: July 1, 201714 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 3 tornado warnings covering Carroll County in 2017 had a tornado report inside them.

Carroll County, 2017

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	1	67%	0
Severe thunderstorm warnings	27	21	22%	26	88%	24 min
Flash flood warnings	9	6	33%	0

Each office's whole area, 2017

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Gray, ME: tornado warnings	7	3	57%	10	80%	16 min
NWS Gray, ME: severe thunderstorm warnings	88	66	25%	173	84%	27 min
NWS Gray, ME: flash flood warnings	25	14	44%	51	90%	92 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, 7:43 AM EST	Special Weather Statement	GYX	62 min
Jan 2, 3:38 PM EST	Winter Weather Advisory	GYX	39 hr
Jan 4, 2:16 AM EST	Mesoscale Discussion	SPC	6 hr
Jan 16, 3:12 PM EST	Winter Storm Watch	GYX	12 hr
Jan 17, 3:29 AM EST	Winter Storm Warning	GYX	32 hr
Jan 17, 3:29 AM EST	Winter Weather Advisory	GYX	38 hr
Jan 22, 3:18 PM EST	Winter Storm Watch	GYX	25 hr
Jan 23, 3:18 AM EST	Winter Weather Advisory	GYX	48 hr
Jan 23, 11:48 PM EST	Mesoscale Discussion	SPC	6 hr
Jan 24, 5:44 AM EST	Mesoscale Discussion	SPC	6 hr
Feb 1, 5:07 PM EST	Special Weather Statement	GYX	53 min
Feb 1, 6:43 PM EST	Special Weather Statement	GYX	47 min
Feb 6, 12:43 AM EST	Special Weather Statement	GYX	47 min
Feb 6, 3:09 PM EST	Winter Weather Advisory	GYX	42 hr
Feb 7, 5:44 PM EST	Mesoscale Discussion	SPC	5 hr
Feb 8, 3:15 PM EST	Winter Storm Warning	GYX	31 hr
Feb 8, 3:15 PM EST	Winter Weather Advisory	GYX	18 hr
Feb 9, 8:49 PM EST	Wind Chill Advisory	GYX	13 hr
Feb 10, 3:45 PM EST	Winter Storm Watch	GYX	25 hr
Feb 11, 4:20 PM EST	Winter Storm Warning	GYX	51 hr
Feb 12, 2:51 PM EST	Mesoscale Discussion	SPC	4 hr
Feb 14, 3:49 AM EST	Winter Storm Watch	GYX	24 hr
Feb 14, 3:50 PM EST	Winter Storm Warning	GYX	46 hr
Feb 23, 2:58 PM EST	Flood Watch	GYX	4 days
Feb 24, 6:35 PM EST	Dense Fog Advisory	GYX	18 hr
Feb 25, 8:38 PM EST	Special Weather Statement	GYX	52 min
Feb 25, 9:42 PM EST	Special Weather Statement	GYX	63 min
Mar 1, 3:28 AM EST	Wind Advisory	GYX	39 hr
Mar 1, 8:04 AM EST	Dense Fog Advisory	GYX	5 hr
Mar 1, 1:27 PM EST	Dense Fog Advisory	GYX	7 hr
Mar 1, 11:12 PM EST	Dense Fog Advisory	GYX	7 hr
Mar 3, 3:34 AM EST	Wind Chill Advisory	GYX	302 days
Mar 3, 6:45 PM EST	Special Weather Statement	GYX	60 min
Mar 7, 3:44 AM EST	Freezing Rain Advisory	GYX	20 hr
Mar 8, 12:46 AM EST	Dense Fog Advisory	GYX	8 hr
Mar 8, 4:28 PM EST	Special Weather Statement	GYX	47 min
Mar 9, 8:14 AM EST	Wind Advisory	GYX	8 hr
Mar 10, 3:02 AM EST	Wind Chill Advisory	GYX	53 hr
Mar 11, 4:01 PM EST	Winter Storm Watch	GYX	35 hr
Mar 13, 3:58 AM EDT	Winter Storm Warning	GYX	55 hr
Mar 14, 9:04 AM EDT	Mesoscale Discussion	SPC	4 hr
Mar 14, 1:57 PM EDT	Mesoscale Discussion	SPC	5 hr
Mar 22, 3:31 AM EDT	Wind Advisory	GYX	17 hr
Mar 22, 4:48 AM EDT	Special Weather Statement	GYX	72 min
Mar 24, 1:56 PM EDT	Winter Weather Advisory	GYX	9 hr
Mar 26, 4:08 AM EDT	Winter Weather Advisory	GYX	17 hr
Mar 26, 9:14 PM EDT	Winter Weather Advisory	GYX	20 hr
Mar 26, 9:14 PM EDT	Freezing Rain Advisory	GYX	18 hr
Mar 29, 3:56 PM EDT	Winter Storm Watch	GYX	35 hr
Mar 30, 3:57 PM EDT	Winter Storm Warning	GYX	51 hr
Apr 3, 3:19 AM EDT	Winter Storm Watch	GYX	12 hr
Apr 3, 3:34 PM EDT	Winter Storm Warning	GYX	36 hr
Apr 3, 3:34 PM EDT	Winter Weather Advisory	GYX	13 hr
Apr 4, 3:40 PM EDT	Flood Watch	GYX	60 hr
Apr 11, 12:19 PM EDT	Flood Watch	GYX	32 hr
Apr 11, 6:41 PM EDT	Special Weather Statement	GYX	34 min
Apr 16, 6:05 PM EDT	Special Weather Statement	GYX	40 min
Apr 16, 6:46 PM EDT	Special Weather Statement	GYX	44 min
May 18, 8:46 PM EDT	Special Weather Statement	GYX	29 min
May 18, 9:16 PM EDT	Severe Thunderstorm Warning	GYX	44 min
May 18, 9:53 PM EDT	Severe Thunderstorm Warning	GYX	52 min
May 20, 3:27 AM EDT	Frost Advisory	GYX	28 hr
May 20, 3:27 AM EDT	Freeze Warning	GYX	28 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, 5:44 PM EDT	Severe Thunderstorm Warning	GYX	61 min
May 31, 6:13 PM EDT	Special Weather Statement	GYX	62 min
May 31, 6:40 PM EDT	Special Weather Statement	GYX	65 min
May 31, 6:46 PM EDT	Severe Thunderstorm Warning	GYX	44 min
May 31, 7:22 PM EDT	Severe Thunderstorm Warning	GYX	38 min
May 31, 7:34 PM EDT	Mesoscale Discussion	SPC	86 min
Jun 6, 11:22 PM EDT	Areal Flood Advisory	GYX	3 hr
Jun 18, 3:19 AM EDT	Flash Flood Watch	GYX	41 hr
Jun 19, 10:45 AM EDT	Mesoscale Discussion	SPC	3 hr
Jun 19, 12:24 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 19, 1:00 PM EDT	Severe Thunderstorm Warning	GYX	60 min
Jun 19, 2:58 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 19, 3:37 PM EDT	Severe Thunderstorm Warning	GYX	68 min
Jun 19, 3:52 PM EDT	Flash Flood Warning	GYX	3 hr
Jun 19, 4:29 PM EDT	Severe Thunderstorm Warning	GYX	46 min
Jun 19, 6:39 PM EDT	Severe Thunderstorm Warning	GYX	36 min
Jun 19, 7:31 PM EDT	Areal Flood Advisory	GYX	59 min
Jun 23, 2:02 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 27, 12:00 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 30, 3:38 AM EDT	Flash Flood Watch	GYX	46 hr
Jun 30, 3:05 PM EDT	Special Weather Statement	GYX	25 min
Jun 30, 7:06 PM EDT	Mesoscale Discussion	SPC	54 min
Jul 1, 12:32 PM EDT	Mesoscale Discussion	SPC	118 min
Jul 1, 1:19 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 1, 1:34 PM EDT	Severe Thunderstorm Warning	GYX	41 min
Jul 1, 1:46 PM EDT	Tornado Warning	GYX	26 min
Jul 1, 3:46 PM EDT	Special Weather Statement	GYX	29 min
Jul 1, 3:51 PM EDT	Severe Thunderstorm Warning	GYX	39 min
Jul 1, 4:10 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 1, 4:13 PM EDT	Tornado Warning	GYX	47 min
Jul 1, 4:40 PM EDT	Severe Thunderstorm Warning	GYX	65 min
Jul 1, 5:01 PM EDT	Tornado Warning	GYX	21 min
Jul 1, 5:10 PM EDT	Flash Flood Warning	GYX	2 hr
Jul 1, 5:48 PM EDT	Severe Thunderstorm Warning	GYX	42 min
Jul 1, 5:50 PM EDT	Severe Thunderstorm Warning	GYX	55 min
Jul 1, 6:58 PM EDT	Flash Flood Warning	GYX	3 hr
Jul 1, 9:34 PM EDT	Flash Flood Warning	GYX	3 hr
Jul 2, 1:20 AM EDT	River Flood Warning	GYX	16 hr
Jul 8, 11:09 AM EDT	Mesoscale Discussion	SPC	3 hr
Jul 8, 12:16 PM EDT	Severe Thunderstorm Warning	GYX	44 min
Jul 8, 12:58 PM EDT	Severe Thunderstorm Warning	GYX	47 min
Jul 8, 1:42 PM EDT	Severe Thunderstorm Warning	GYX	48 min
Jul 8, 3:37 PM EDT	Severe Thunderstorm Warning	GYX	38 min
Jul 12, 2:39 PM EDT	Special Weather Statement	GYX	51 min
Jul 17, 6:58 PM EDT	Mesoscale Discussion	SPC	62 min
Jul 17, 7:06 PM EDT	Severe Thunderstorm Warning	GYX	54 min
Jul 17, 7:10 PM EDT	Severe Thunderstorm Warning	GYX	65 min
Jul 17, 7:58 PM EDT	Severe Thunderstorm Warning	GYX	62 min
Jul 17, 9:20 PM EDT	Flash Flood Warning	GYX	3 hr
Jul 17, 9:51 PM EDT	Special Weather Statement	GYX	54 min
Jul 17, 11:03 PM EDT	Areal Flood Advisory	GYX	117 min
Jul 19, 3:04 AM EDT	Dense Fog Advisory	GYX	6 hr
Jul 20, 1:38 PM EDT	Mesoscale Discussion	SPC	2 hr
Jul 31, 5:10 PM EDT	Special Weather Statement	GYX	35 min
Jul 31, 5:28 PM EDT	Special Weather Statement	GYX	32 min
Aug 2, 4:46 PM EDT	Special Weather Statement	GYX	29 min
Aug 2, 6:45 PM EDT	Severe Thunderstorm Warning	GYX	60 min
Aug 2, 7:52 PM EDT	Areal Flood Advisory	GYX	113 min
Aug 3, 12:56 PM EDT	Special Weather Statement	GYX	34 min
Aug 3, 1:30 PM EDT	Areal Flood Advisory	GYX	3 hr
Aug 3, 1:33 PM EDT	Special Weather Statement	GYX	27 min
Aug 3, 5:29 PM EDT	Special Weather Statement	GYX	31 min
Aug 3, 5:40 PM EDT	Areal Flood Advisory	GYX	3 hr
Aug 4, 6:05 PM EDT	Severe Thunderstorm Warning	GYX	55 min
Aug 5, 11:36 AM EDT	Mesoscale Discussion	SPC	114 min
Aug 5, 5:14 PM EDT	Special Weather Statement	GYX	46 min
Aug 5, 6:35 PM EDT	Special Weather Statement	GYX	40 min
Aug 9, 6:31 AM EDT	Dense Fog Advisory	GYX	107 min
Aug 18, 4:09 PM EDT	Areal Flood Advisory	GYX	3 hr
Aug 18, 6:59 PM EDT	Areal Flood Advisory	GYX	3 hr
Aug 22, 3:55 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 22, 7:58 PM EDT	Severe Thunderstorm Warning	GYX	47 min
Aug 22, 8:04 PM EDT	Mesoscale Discussion	SPC	86 min
Aug 22, 9:52 PM EDT	Severe Thunderstorm Warning	GYX	53 min
Aug 22, 10:25 PM EDT	Severe Thunderstorm Warning	GYX	51 min
Aug 22, 10:53 PM EDT	Mesoscale Discussion	SPC	97 min
Sep 1, 3:07 PM EDT	Frost Advisory	GYX	15 hr
Sep 5, 4:30 PM EDT	Mesoscale Discussion	SPC	2 hr
Sep 5, 4:44 PM EDT	Special Weather Statement	GYX	31 min
Sep 5, 6:20 PM EDT	Areal Flood Advisory	GYX	115 min
Sep 6, 3:29 AM EDT	Flash Flood Watch	GYX	24 hr
Sep 14, 7:11 PM EDT	Special Weather Statement	GYX	49 min
Sep 15, 11:01 PM EDT	Dense Fog Advisory	GYX	10 hr
Sep 17, 6:31 PM EDT	Dense Fog Advisory	GYX	14 hr
Sep 27, 4:05 AM EDT	Dense Fog Advisory	GYX	6 hr
Sep 30, 3:19 AM EDT	Frost Advisory	GYX	29 hr
Oct 11, 2:28 PM EDT	Frost Advisory	GYX	18 hr
Oct 12, 2:37 PM EDT	Frost Advisory	GYX	16 hr
Oct 12, 2:37 PM EDT	Freeze Warning	GYX	16 hr
Oct 25, 12:08 AM EDT	Areal Flood Advisory	GYX	3 hr
Oct 25, 12:14 AM EDT	Special Weather Statement	GYX	31 min
Oct 25, 12:33 AM EDT	Severe Thunderstorm Warning	GYX	57 min
Oct 25, 12:56 AM EDT	Areal Flood Advisory	GYX	6 hr
Oct 25, 1:21 AM EDT	Flash Flood Warning	GYX	6 hr
Oct 26, 10:04 PM EDT	Areal Flood Advisory	GYX	3 hr
Oct 26, 10:26 PM EDT	Areal Flood Warning	GYX	2 hr
Oct 28, 3:55 AM EDT	Flash Flood Watch	GYX	63 hr
Oct 29, 3:59 AM EDT	High Wind Warning	GYX	30 hr
Oct 29, 3:59 AM EDT	Wind Advisory	GYX	38 hr
Oct 29, 3:07 PM EDT	River Flood Warning	GYX	35 hr
Oct 30, 1:19 AM EDT	Areal Flood Warning	GYX	6 hr
Oct 30, 2:55 AM EDT	Flash Flood Warning	GYX	6 hr
Oct 30, 4:04 AM EDT	Flash Flood Warning	GYX	6 hr
Oct 30, 4:21 AM EDT	Flash Flood Warning	GYX	6 hr
Oct 30, 8:53 AM EDT	Areal Flood Warning	GYX	6 hr
Nov 9, 3:25 PM EST	Wind Advisory	GYX	29 hr
Nov 10, 2:47 AM EST	Special Weather Statement	GYX	118 min
Nov 18, 2:48 PM EST	Wind Advisory	GYX	30 hr
Nov 18, 2:49 PM EST	Winter Weather Advisory	GYX	13 hr
Dec 8, 3:02 PM EST	Winter Storm Watch	GYX	12 hr
Dec 9, 3:22 AM EST	Winter Weather Advisory	GYX	24 hr
Dec 10, 3:16 PM EST	Winter Storm Watch	GYX	24 hr
Dec 11, 3:32 PM EST	Winter Storm Warning	GYX	44 hr
Dec 16, 3:45 PM EST	Special Weather Statement	GYX	60 min
Dec 16, 4:41 PM EST	Special Weather Statement	GYX	79 min
Dec 19, 8:25 PM EST	Special Weather Statement	GYX	35 min
Dec 21, 3:45 PM EST	Winter Weather Advisory	GYX	53 hr
Dec 21, 11:29 PM EST	Winter Storm Warning	GYX	27 hr
Dec 23, 9:50 AM EST	Mesoscale Discussion	SPC	4 hr
Dec 23, 1:49 PM EST	Mesoscale Discussion	SPC	5 hr
Dec 23, 2:59 PM EST	Winter Storm Watch	GYX	12 hr
Dec 24, 2:51 AM EST	Winter Storm Warning	GYX	36 hr
Dec 27, 3:55 AM EST	Wind Chill Advisory	GYX	57 hr
Dec 27, 2:56 PM EST	Wind Chill Warning	GYX	40 hr
Dec 30, 3:22 AM EST	Wind Chill Advisory	GYX	24 hr
Dec 30, 3:31 PM EST	Wind Chill Warning	GYX	63 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
Tornado Warning	3
Severe Thunderstorm Watch	4
Mesoscale Discussion	26
Special Weather Statement	34
Flooding
Areal Flood Warning	3
Flash Flood Warning	9
River Flood Warning	2
Flash Flood Watch	4
Flood Watch	3
Areal Flood Advisory	12
Winter
Winter Storm Warning	10
Winter Storm Watch	10
Freezing Rain Advisory	2
Winter Weather Advisory	12
Cold
Freeze Warning	2
Wind Chill Warning	2
Frost Advisory	5
Wind Chill Advisory	5
Wind and dust
High Wind Warning	1
Wind Advisory	6
Fog and smoke
Dense Fog Advisory	10

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2016 2018

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.