Weather alerts in New Hampshire, 2009

346 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Weather alerts by county

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts: 346
Warnings: 128
Watches: 49
Advisories: 130
Busiest month: July73 alerts
Busiest day: August 21, 200926 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 2 tornado warnings covering New Hampshire in 2009 had a tornado report inside them.

New Hampshire, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	0	100%	0
Severe thunderstorm warnings	68	36	47%	50	82%	23 min
Flash flood warnings	7	3	57%	11	73%	78 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Boston/Norton, MA: tornado warnings	2	0	100%	2	0%
NWS Boston/Norton, MA: severe thunderstorm warnings	114	66	42%	250	78%	21 min
NWS Boston/Norton, MA: flash flood warnings	22	3	86%	13	62%	68 min
NWS Gray, ME: tornado warnings	6	2	67%	3	67%	7 min
NWS Gray, ME: severe thunderstorm warnings	117	51	56%	85	87%	22 min
NWS Gray, ME: flash flood warnings	15	5	67%	9	78%	108 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	Counties	Lasted
Jan 1, 10:04 AM EST	Wind Chill Advisory	GYX	Coos, Grafton	3 hr
Jan 5, 3:33 PM EST	Winter Storm Watch	BOX	Cheshire, Hillsborough	24 hr
Jan 6, 3:26 AM EST	Winter Storm Watch	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	14 hr
Jan 6, 4:53 AM EST	Winter Storm Warning	BOX	Cheshire, Hillsborough	47 hr
Jan 6, 5:10 PM EST	Winter Storm Warning	GYX	Carroll, Coos, Grafton, Sullivan	34 hr
Jan 6, 5:10 PM EST	Winter Weather Advisory	GYX	Belknap, Carroll, Merrimack, Rockingham, Strafford	34 hr
Jan 7, 6:08 AM EST	Mesoscale Discussion	SPC	Cheshire, Hillsborough, Rockingham, Strafford	3 hr
Jan 7, 11:39 AM EST	Mesoscale Discussion	SPC	Belknap, Carroll, Cheshire, Coos, Grafton, Hillsborough and 4 more	6 hr
Jan 9, 4:25 AM EST	Winter Storm Watch	BOX	Cheshire, Hillsborough	24 hr
Jan 10, 3:38 AM EST	Winter Storm Watch	GYX	Belknap, Carroll, Grafton, Merrimack, Rockingham, Strafford and 1 more	12 hr
Jan 10, 4:39 AM EST	Winter Storm Warning	BOX	Cheshire, Hillsborough	30 hr
Jan 10, 2:44 PM EST	Coastal Flood Warning	GYX	Rockingham	21 hr
Jan 10, 3:11 PM EST	Winter Storm Warning	GYX	Merrimack, Rockingham, Strafford, Sullivan	21 hr
Jan 10, 3:11 PM EST	Winter Weather Advisory	GYX	Belknap, Carroll, Grafton	23 hr
Jan 14, 10:41 AM EST	Wind Chill Advisory	GYX	Coos, Grafton	7 hr
Jan 17, 3:15 AM EST	Winter Storm Watch	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	12 hr
Jan 17, 3:00 PM EST	Winter Storm Warning	GYX	Belknap, Carroll, Coos, Merrimack, Rockingham, Strafford	40 hr
Jan 17, 3:00 PM EST	Winter Weather Advisory	GYX	Coos, Grafton, Sullivan	24 hr
Jan 17, 4:22 PM EST	Winter Storm Warning	BOX	Cheshire, Hillsborough	22 hr
Jan 17, 4:22 PM EST	Winter Weather Advisory	BOX	Cheshire	22 hr
Jan 18, 11:35 AM EST	Mesoscale Discussion	SPC	Strafford	4 hr
Jan 24, 2:32 AM EST	Wind Chill Advisory	GYX	Coos	31 hr
Jan 26, 3:03 PM EST	Winter Storm Watch	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	18 hr
Jan 26, 3:35 PM EST	Winter Storm Watch	BOX	Cheshire, Hillsborough	24 hr
Jan 27, 2:43 AM EST	Winter Storm Warning	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	51 hr
Jan 27, 3:28 AM EST	Winter Storm Warning	BOX	Cheshire, Hillsborough	45 hr
Jan 28, 7:53 AM EST	Mesoscale Discussion	SPC	Belknap, Carroll, Cheshire, Grafton, Hillsborough, Merrimack and 1 more	5 hr
Jan 28, 12:26 PM EST	Mesoscale Discussion	SPC	Belknap, Carroll, Cheshire, Coos, Grafton, Hillsborough and 4 more	6 hr
Feb 10, 3:03 AM EST	Winter Weather Advisory	GYX	Carroll, Coos, Grafton	11 hr
Feb 17, 3:42 PM EST	Winter Storm Watch	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	12 hr
Feb 18, 4:09 AM EST	Winter Storm Warning	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Strafford and 1 more	27 hr
Feb 18, 4:09 AM EST	Winter Weather Advisory	GYX	Rockingham	24 hr
Feb 18, 4:21 AM EST	Winter Weather Advisory	BOX	Cheshire, Hillsborough	24 hr
Feb 18, 6:28 PM EST	Mesoscale Discussion	SPC	Belknap, Carroll, Cheshire, Grafton, Hillsborough, Merrimack and 3 more	4 hr
Feb 19, 12:07 AM EST	Mesoscale Discussion	SPC	Belknap, Carroll, Coos, Grafton, Merrimack, Strafford and 1 more	4 hr
Feb 21, 4:07 AM EST	Winter Storm Watch	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	12 hr
Feb 21, 4:35 AM EST	Winter Storm Watch	BOX	Cheshire, Hillsborough	12 hr
Feb 21, 3:44 PM EST	Winter Storm Warning	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Strafford and 1 more	43 hr
Feb 21, 3:44 PM EST	Winter Weather Advisory	GYX	Rockingham	36 hr
Feb 21, 4:26 PM EST	Winter Storm Warning	BOX	Cheshire, Hillsborough	31 hr
Feb 21, 4:26 PM EST	Winter Weather Advisory	BOX	Hillsborough	31 hr
Feb 22, 6:00 PM EST	Mesoscale Discussion	SPC	Belknap, Carroll, Coos, Grafton, Merrimack	5 hr
Feb 28, 5:07 AM EST	Winter Storm Watch	BOX	Cheshire, Hillsborough	36 hr
Feb 28, 3:25 PM EST	Winter Storm Watch	GYX	Belknap, Carroll, Merrimack, Rockingham, Strafford	12 hr
Mar 1, 3:09 AM EST	Winter Storm Watch	GYX	Coos, Grafton, Sullivan	12 hr
Mar 1, 3:09 AM EST	Winter Storm Warning	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	34 hr
Mar 1, 4:27 AM EST	Winter Storm Warning	BOX	Cheshire, Hillsborough	35 hr
Mar 1, 4:43 PM EST	Winter Weather Advisory	BOX	Cheshire, Hillsborough	26 hr
Mar 2, 12:41 AM EST	Mesoscale Discussion	SPC	Hillsborough, Rockingham, Strafford	4 hr
Mar 2, 6:38 AM EST	Mesoscale Discussion	SPC	Belknap, Hillsborough, Rockingham, Strafford	4 hr
Mar 7, 3:24 AM EST	Winter Weather Advisory	GYX	Coos	26 hr
Mar 7, 4:25 PM EST	Flood Watch	BOX	Cheshire, Hillsborough	22 hr
Mar 8, 3:06 PM EDT	Winter Weather Advisory	GYX	Belknap, Grafton, Merrimack, Rockingham, Strafford, Sullivan	26 hr
Mar 8, 3:59 PM EDT	Winter Weather Advisory	BOX	Cheshire, Hillsborough	26 hr
Mar 9, 4:14 AM EDT	Winter Storm Warning	BOX	Cheshire, Hillsborough	14 hr
Mar 10, 3:36 PM EDT	Winter Weather Advisory	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Sullivan	19 hr
Mar 10, 4:05 PM EDT	Winter Weather Advisory	BOX	Cheshire, Hillsborough	16 hr
Apr 2, 3:15 PM EDT	Flood Watch	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	44 hr
Apr 4, 1:04 AM EDT	River Flood Warning	GYX	Rockingham	35 hr
Apr 5, 3:38 PM EDT	Flood Watch	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	43 hr
Apr 6, 2:54 AM EDT	Coastal Flood Statement	GYX	Rockingham	21 hr
Apr 6, 10:15 PM EDT	River Flood Warning	GYX	Merrimack	41 hr
Apr 6, 10:15 PM EDT	River Flood Warning	GYX	Carroll	10 hr
Apr 7, 9:41 AM EDT	Coastal Flood Statement	GYX	Rockingham	2 hr
Apr 12, 2:56 PM EDT	Fire Weather Watch	GYX		20 hr
Apr 12, 3:43 PM EDT	Fire Weather Watch	BOX		12 hr
Apr 13, 3:37 AM EDT	Red Flag Warning	BOX		14 hr
Apr 13, 8:32 AM EDT	Red Flag Warning	GYX		10 hr
Apr 16, 2:30 PM EDT	Fire Weather Watch	GYX		13 hr
Apr 16, 4:50 PM EDT	Fire Weather Watch	BOX		11 hr
Apr 17, 3:23 AM EDT	Red Flag Warning	GYX		17 hr
Apr 17, 4:11 AM EDT	Red Flag Warning	BOX		16 hr
Apr 27, 3:50 PM EDT	Fire Weather Watch	GYX		17 hr
Apr 27, 4:40 PM EDT	Fire Weather Watch	BOX		12 hr
Apr 28, 3:53 AM EDT	Red Flag Warning	GYX		14 hr
Apr 28, 4:26 AM EDT	Red Flag Warning	BOX		17 hr
Apr 29, 4:36 PM EDT	Fire Weather Watch	BOX		12 hr
Apr 29, 6:23 PM EDT	Fire Weather Watch	GYX		9 hr
Apr 30, 2:56 AM EDT	Red Flag Warning	GYX		15 hr
Apr 30, 4:54 AM EDT	Red Flag Warning	BOX		14 hr
May 9, 2:56 PM EDT	Mesoscale Discussion	SPC	Grafton, Sullivan	94 min
May 9, 3:00 PM EDT	Severe Thunderstorm Warning	GYX	Coos	45 min
May 9, 3:33 PM EDT	Severe Thunderstorm Warning	GYX	Coos	42 min
May 9, 3:40 PM EDT	Severe Thunderstorm Watch	SPC	Belknap, Carroll, Cheshire, Coos, Grafton, Hillsborough and 4 more	6 hr
May 9, 5:33 PM EDT	Severe Thunderstorm Warning	GYX	Grafton, Merrimack, Sullivan	57 min
May 9, 5:42 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	33 min
May 9, 5:47 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack, Sullivan	58 min
May 9, 6:08 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Grafton, Merrimack	52 min
May 9, 6:17 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Grafton	43 min
May 9, 6:42 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	33 min
May 9, 6:42 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Merrimack, Strafford	48 min
May 9, 6:47 PM EDT	Mesoscale Discussion	SPC	Cheshire, Hillsborough, Rockingham, Strafford	88 min
May 9, 7:02 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack, Rockingham, Strafford	43 min
May 9, 7:21 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	39 min
May 9, 7:58 PM EDT	Severe Thunderstorm Warning	BOX	Hillsborough	32 min
May 13, 4:21 PM EDT	Wind Advisory	BOX	Cheshire, Hillsborough	27 hr
May 14, 3:19 AM EDT	Wind Advisory	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	17 hr
May 18, 3:06 AM EDT	Frost Advisory	GYX	Belknap, Carroll, Grafton, Merrimack, Rockingham, Strafford and 1 more	28 hr
May 18, 4:18 AM EDT	Frost Advisory	BOX	Hillsborough	27 hr
May 18, 4:18 AM EDT	Freeze Warning	BOX	Cheshire	27 hr
May 24, 4:34 PM EDT	Fire Weather Watch	GYX		10 hr
May 25, 2:54 AM EDT	Red Flag Warning	GYX		16 hr
May 25, 3:08 AM EDT	Frost Advisory	GYX	Belknap, Carroll, Grafton, Merrimack, Rockingham, Strafford and 1 more	28 hr
May 25, 4:01 AM EDT	Frost Advisory	BOX	Cheshire, Hillsborough	27 hr
May 25, 4:06 AM EDT	Red Flag Warning	BOX		15 hr
May 31, 4:16 AM EDT	Frost Advisory	BOX	Hillsborough	27 hr
May 31, 4:16 AM EDT	Freeze Warning	BOX	Cheshire	27 hr
May 31, 2:17 PM EDT	Frost Advisory	GYX	Belknap, Carroll, Grafton, Merrimack, Sullivan	17 hr
May 31, 2:17 PM EDT	Freeze Warning	GYX	Coos	17 hr
May 31, 2:22 PM EDT	Severe Thunderstorm Warning	GYX	Coos	23 min
May 31, 2:48 PM EDT	Severe Thunderstorm Warning	GYX	Coos	27 min
Jun 4, 2:45 PM EDT	Frost Advisory	GYX	Carroll, Coos, Grafton	16 hr
Jun 12, 2:43 AM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	107 min
Jun 12, 4:44 AM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	106 min
Jun 13, 3:13 PM EDT	Flood Watch	GYX	Belknap, Grafton, Merrimack, Rockingham, Strafford, Sullivan	21 hr
Jun 13, 8:41 PM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	85 min
Jun 13, 9:40 PM EDT	Areal Flood Warning	BOX	Cheshire, Hillsborough	117 min
Jun 13, 11:48 PM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	3 hr
Jun 14, 12:01 AM EDT	Areal Flood Advisory	GYX	Belknap, Carroll, Merrimack, Rockingham, Strafford	8 hr
Jun 14, 8:22 AM EDT	Areal Flood Advisory	GYX	Carroll	3 hr
Jun 14, 12:39 PM EDT	Areal Flood Advisory	GYX	Belknap, Carroll, Strafford	3 hr
Jun 14, 1:13 PM EDT	Areal Flood Advisory	GYX	Merrimack, Rockingham, Strafford	3 hr
Jun 19, 4:35 PM EDT	Flood Watch	BOX	Cheshire, Hillsborough	36 hr
Jun 20, 1:57 PM EDT	Coastal Flood Statement	GYX	Rockingham	25 hr
Jun 21, 3:12 PM EDT	Coastal Flood Warning	GYX	Rockingham	34 hr
Jun 24, 3:11 AM EDT	Coastal Flood Warning	GYX	Rockingham	24 hr
Jun 26, 12:06 PM EDT	Mesoscale Discussion	SPC	Coos, Grafton	54 min
Jun 26, 12:13 PM EDT	Severe Thunderstorm Watch	SPC	Belknap, Carroll, Coos, Grafton, Merrimack, Sullivan	8 hr
Jun 26, 1:21 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Coos	39 min
Jun 26, 1:41 PM EDT	Severe Thunderstorm Warning	GYX	Coos	49 min
Jun 26, 1:49 PM EDT	Severe Thunderstorm Warning	GYX	Coos	56 min
Jun 26, 1:55 PM EDT	Severe Thunderstorm Warning	GYX	Coos, Grafton	40 min
Jun 26, 1:57 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Coos	63 min
Jun 26, 2:09 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Merrimack, Rockingham, Strafford	36 min
Jun 26, 2:27 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Strafford	49 min
Jun 26, 2:39 PM EDT	Severe Thunderstorm Warning	GYX	Strafford	41 min
Jun 26, 4:08 PM EDT	Severe Thunderstorm Warning	GYX	Coos	52 min
Jun 26, 4:45 PM EDT	Severe Thunderstorm Warning	GYX	Coos	45 min
Jun 26, 6:00 PM EDT	Mesoscale Discussion	SPC	Coos, Grafton	60 min
Jun 27, 5:11 PM EDT	Areal Flood Advisory	BOX	Hillsborough	3 hr
Jun 27, 5:16 PM EDT	Severe Thunderstorm Warning	BOX	Hillsborough	44 min
Jun 27, 5:25 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack	35 min
Jun 27, 5:47 PM EDT	Areal Flood Advisory	BOX	Hillsborough	2 hr
Jun 27, 5:53 PM EDT	Severe Thunderstorm Warning	BOX	Hillsborough	52 min
Jun 27, 6:07 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Merrimack	38 min
Jun 27, 6:32 PM EDT	Flash Flood Warning	GYX	Belknap, Merrimack	3 hr
Jun 27, 6:43 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Merrimack	47 min
Jun 27, 9:03 PM EDT	Areal Flood Warning	GYX	Belknap	6 hr
Jun 27, 9:39 PM EDT	Areal Flood Advisory	BOX	Cheshire	111 min
Jun 29, 5:08 AM EDT	Areal Flood Advisory	GYX	Coos	4 hr
Jun 29, 10:50 AM EDT	Areal Flood Advisory	GYX	Grafton, Merrimack, Sullivan	4 hr
Jun 29, 4:52 PM EDT	Areal Flood Advisory	GYX	Merrimack	4 hr
Jun 29, 5:41 PM EDT	Areal Flood Advisory	GYX	Carroll	4 hr
Jun 29, 6:14 PM EDT	Areal Flood Advisory	GYX	Belknap	3 hr
Jun 29, 7:34 PM EDT	Flash Flood Warning	GYX	Merrimack	3 hr
Jun 29, 7:47 PM EDT	Areal Flood Advisory	BOX	Hillsborough	3 hr
Jun 29, 8:06 PM EDT	Areal Flood Advisory	GYX	Rockingham, Strafford	3 hr
Jun 30, 7:38 PM EDT	Areal Flood Advisory	BOX	Cheshire	3 hr
Jun 30, 9:19 PM EDT	Areal Flood Advisory	GYX	Grafton, Sullivan	3 hr
Jun 30, 9:42 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	33 min
Jul 1, 4:54 AM EDT	Flash Flood Watch	BOX	Cheshire, Hillsborough	42 hr
Jul 1, 2:03 PM EDT	Areal Flood Advisory	GYX	Belknap, Merrimack, Rockingham, Strafford	3 hr
Jul 2, 7:07 AM EDT	Flash Flood Watch	GYX	Belknap, Carroll, Grafton, Merrimack, Rockingham, Strafford and 1 more	21 hr
Jul 2, 7:50 AM EDT	Areal Flood Advisory	BOX	Hillsborough	3 hr
Jul 2, 8:41 AM EDT	Flash Flood Warning	BOX	Hillsborough	4 hr
Jul 2, 9:09 AM EDT	Flash Flood Warning	GYX	Belknap, Carroll, Merrimack, Rockingham, Strafford	3 hr
Jul 2, 12:18 PM EDT	Areal Flood Advisory	BOX	Hillsborough	3 hr
Jul 2, 7:47 PM EDT	Flash Flood Warning	GYX	Strafford	2 hr
Jul 3, 4:08 AM EDT	Flash Flood Watch	BOX	Cheshire, Hillsborough	16 hr
Jul 3, 6:29 PM EDT	Severe Thunderstorm Warning	GYX	Coos	61 min
Jul 4, 12:56 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Merrimack	49 min
Jul 4, 2:39 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	36 min
Jul 7, 8:59 AM EDT	Mesoscale Discussion	SPC	Cheshire, Hillsborough, Merrimack, Sullivan	3 hr
Jul 7, 11:05 AM EDT	Severe Thunderstorm Watch	SPC	Cheshire, Hillsborough	8 hr
Jul 7, 2:00 PM EDT	Mesoscale Discussion	SPC	Cheshire, Hillsborough	90 min
Jul 7, 2:17 PM EDT	Severe Thunderstorm Warning	BOX	Hillsborough	28 min
Jul 7, 2:29 PM EDT	Severe Thunderstorm Warning	GYX	Rockingham	31 min
Jul 7, 4:41 PM EDT	Areal Flood Advisory	GYX	Rockingham, Strafford	3 hr
Jul 7, 4:41 PM EDT	Mesoscale Discussion	SPC	Cheshire, Hillsborough	2 hr
Jul 8, 5:06 PM EDT	Areal Flood Advisory	GYX	Grafton	3 hr
Jul 13, 3:00 PM EDT	Severe Thunderstorm Warning	GYX	Coos	45 min
Jul 16, 5:25 PM EDT	Areal Flood Advisory	GYX	Belknap, Strafford	110 min
Jul 16, 6:16 PM EDT	Mesoscale Discussion	SPC	Belknap, Cheshire, Coos, Grafton, Hillsborough, Merrimack and 1 more	59 min
Jul 16, 7:42 PM EDT	Mesoscale Discussion	SPC	Cheshire, Grafton, Sullivan	33 min
Jul 16, 8:02 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	43 min
Jul 16, 8:11 PM EDT	Tornado Warning	GYX	Grafton	34 min
Jul 16, 8:42 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	33 min
Jul 16, 8:46 PM EDT	Tornado Warning	GYX	Grafton	29 min
Jul 16, 9:16 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Grafton	44 min
Jul 18, 12:34 AM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	3 hr
Jul 23, 4:02 AM EDT	Coastal Flood Statement	GYX	Rockingham	11 hr
Jul 23, 2:54 PM EDT	Flood Watch	BOX	Cheshire, Hillsborough	19 hr
Jul 23, 3:14 PM EDT	Coastal Flood Advisory	GYX	Rockingham	12 hr
Jul 23, 3:28 PM EDT	Flood Watch	GYX	Belknap, Carroll, Grafton, Merrimack, Rockingham, Strafford and 1 more	23 hr
Jul 24, 3:07 AM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	4 hr
Jul 24, 3:48 AM EDT	Coastal Flood Statement	GYX	Rockingham	11 hr
Jul 24, 4:47 AM EDT	Areal Flood Advisory	GYX	Grafton, Merrimack, Sullivan	6 hr
Jul 24, 7:04 AM EDT	Areal Flood Advisory	BOX	Hillsborough	4 hr
Jul 24, 7:31 AM EDT	Areal Flood Advisory	GYX	Belknap, Carroll, Grafton, Merrimack, Rockingham, Strafford	4 hr
Jul 24, 11:28 AM EDT	Areal Flood Advisory	GYX	Belknap, Carroll, Merrimack, Rockingham, Strafford	3 hr
Jul 24, 2:48 PM EDT	Coastal Flood Statement	GYX	Rockingham	13 hr
Jul 26, 4:38 AM EDT	Flash Flood Watch	BOX	Cheshire, Hillsborough	24 hr
Jul 26, 1:13 PM EDT	Mesoscale Discussion	SPC	Belknap, Cheshire, Grafton, Hillsborough, Merrimack, Rockingham and 2 more	2 hr
Jul 26, 3:35 PM EDT	Flash Flood Watch	GYX	Belknap, Merrimack, Rockingham, Strafford, Sullivan	3 hr
Jul 26, 3:51 PM EDT	Severe Thunderstorm Watch	SPC	Cheshire, Hillsborough	7 hr
Jul 26, 4:46 PM EDT	Severe Thunderstorm Warning	BOX	Hillsborough	29 min
Jul 27, 11:02 AM EDT	Mesoscale Discussion	SPC	Belknap, Carroll, Cheshire, Coos, Grafton, Merrimack and 2 more	118 min
Jul 27, 12:57 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	33 min
Jul 27, 2:15 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack, Sullivan	45 min
Jul 27, 2:20 PM EDT	Mesoscale Discussion	SPC	Cheshire, Hillsborough	55 min
Jul 27, 3:07 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire	38 min
Jul 27, 3:15 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	45 min
Jul 27, 3:40 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Merrimack	35 min
Jul 27, 3:59 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	33 min
Jul 27, 7:05 PM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	3 hr
Jul 29, 4:10 AM EDT	Flash Flood Watch	BOX	Cheshire	24 hr
Jul 29, 3:11 PM EDT	Flash Flood Watch	GYX	Carroll, Coos, Grafton, Sullivan	19 hr
Jul 29, 8:23 PM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	4 hr
Jul 29, 10:45 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Grafton, Merrimack	45 min
Jul 29, 11:43 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	77 min
Jul 30, 12:50 AM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	3 hr
Jul 30, 3:57 AM EDT	Areal Flood Advisory	BOX	Cheshire	3 hr
Jul 31, 7:15 AM EDT	Flood Watch	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	13 hr
Jul 31, 10:04 AM EDT	Areal Flood Advisory	GYX	Grafton, Sullivan	4 hr
Jul 31, 10:24 AM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	3 hr
Jul 31, 11:46 AM EDT	Areal Flood Advisory	GYX	Belknap, Carroll, Coos, Grafton, Merrimack	3 hr
Jul 31, 11:55 AM EDT	Areal Flood Advisory	BOX	Hillsborough	3 hr
Jul 31, 12:47 PM EDT	Flash Flood Watch	BOX	Cheshire	5 hr
Jul 31, 12:54 PM EDT	Areal Flood Warning	GYX	Belknap, Carroll, Grafton, Merrimack, Sullivan	6 hr
Jul 31, 1:23 PM EDT	Areal Flood Advisory	BOX	Cheshire	3 hr
Jul 31, 2:47 PM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	3 hr
Aug 5, 2:16 PM EDT	Mesoscale Discussion	SPC	Cheshire, Hillsborough, Merrimack, Rockingham, Strafford	59 min
Aug 11, 6:58 AM EDT	Severe Thunderstorm Warning	GYX	Belknap, Merrimack	47 min
Aug 11, 7:37 AM EDT	Severe Thunderstorm Warning	GYX	Belknap, Merrimack, Rockingham, Strafford	53 min
Aug 11, 2:39 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	36 min
Aug 12, 3:47 PM EDT	Areal Flood Advisory	GYX	Coos	118 min
Aug 12, 6:36 PM EDT	Areal Flood Advisory	GYX	Grafton	114 min
Aug 12, 7:44 PM EDT	Areal Flood Advisory	GYX	Grafton	2 hr
Aug 13, 4:18 PM EDT	Areal Flood Advisory	GYX	Coos, Grafton	3 hr
Aug 20, 3:17 PM EDT	Coastal Flood Statement	GYX	Rockingham	11 hr
Aug 21, 10:01 AM EDT	Mesoscale Discussion	SPC	Cheshire, Grafton, Sullivan	119 min
Aug 21, 10:47 AM EDT	Severe Thunderstorm Watch	SPC	Belknap, Carroll, Cheshire, Coos, Grafton, Hillsborough and 4 more	7 hr
Aug 21, 1:58 PM EDT	Mesoscale Discussion	SPC	Cheshire, Grafton, Hillsborough, Merrimack, Sullivan	92 min
Aug 21, 2:09 PM EDT	Severe Thunderstorm Warning	GYX	Grafton, Sullivan	36 min
Aug 21, 2:53 PM EDT	Severe Thunderstorm Warning	GYX	Grafton, Merrimack, Sullivan	37 min
Aug 21, 3:07 PM EDT	Severe Thunderstorm Warning	GYX	Grafton	38 min
Aug 21, 3:20 PM EDT	Severe Thunderstorm Warning	GYX	Coos	55 min
Aug 21, 3:27 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Grafton, Merrimack	33 min
Aug 21, 3:27 PM EDT	Severe Thunderstorm Warning	GYX	Coos, Grafton	48 min
Aug 21, 3:33 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	42 min
Aug 21, 3:39 PM EDT	Areal Flood Advisory	GYX	Carroll, Coos, Grafton	3 hr
Aug 21, 3:45 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire	60 min
Aug 21, 3:55 PM EDT	Areal Flood Advisory	GYX	Carroll	3 hr
Aug 21, 4:02 PM EDT	Flash Flood Warning	GYX	Grafton	3 hr
Aug 21, 4:05 PM EDT	Areal Flood Advisory	GYX	Belknap, Merrimack, Sullivan	3 hr
Aug 21, 4:05 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	25 min
Aug 21, 4:22 PM EDT	Tornado Watch	SPC	Belknap, Carroll, Cheshire, Hillsborough, Merrimack, Rockingham and 1 more	3 hr
Aug 21, 4:30 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Coos	25 min
Aug 21, 4:34 PM EDT	Areal Flood Advisory	BOX	Cheshire	116 min
Aug 21, 4:45 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	60 min
Aug 21, 4:48 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll	45 min
Aug 21, 5:45 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	52 min
Aug 21, 5:55 PM EDT	Mesoscale Discussion	SPC	Belknap, Carroll, Cheshire, Hillsborough, Merrimack, Rockingham and 1 more	80 min
Aug 21, 6:02 PM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	118 min
Aug 21, 6:49 PM EDT	Severe Thunderstorm Warning	BOX	Hillsborough	41 min
Aug 21, 7:25 PM EDT	Severe Thunderstorm Warning	GYX	Rockingham, Strafford	35 min
Aug 22, 4:22 AM EDT	Coastal Flood Advisory	GYX	Rockingham	35 hr
Aug 22, 12:23 PM EDT	Areal Flood Advisory	GYX	Rockingham, Strafford	3 hr
Aug 22, 12:48 PM EDT	Severe Thunderstorm Warning	GYX	Rockingham, Strafford	42 min
Aug 22, 2:18 PM EDT	Areal Flood Advisory	BOX	Hillsborough	117 min
Aug 22, 3:21 PM EDT	Areal Flood Advisory	GYX	Rockingham, Strafford	3 hr
Aug 22, 3:36 PM EDT	High Surf Advisory	GYX	Rockingham	27 hr
Aug 22, 5:16 PM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	119 min
Aug 22, 6:15 PM EDT	Flash Flood Warning	BOX	Cheshire, Hillsborough	2 hr
Aug 23, 2:50 PM EDT	Areal Flood Advisory	GYX	Carroll	3 hr
Aug 23, 5:31 PM EDT	Areal Flood Advisory	GYX	Carroll	3 hr
Aug 23, 5:43 PM EDT	Areal Flood Advisory	GYX	Belknap, Carroll, Merrimack, Strafford	3 hr
Aug 31, 3:47 PM EDT	Frost Advisory	GYX	Carroll, Coos, Grafton, Sullivan	16 hr
Sep 16, 2:25 AM EDT	Frost Advisory	GYX	Carroll, Coos, Grafton	30 hr
Sep 19, 2:43 AM EDT	Frost Advisory	GYX	Belknap, Carroll, Merrimack, Rockingham, Strafford, Sullivan	29 hr
Sep 19, 2:43 AM EDT	Freeze Warning	GYX	Carroll, Coos, Grafton	29 hr
Sep 19, 2:49 AM EDT	Frost Advisory	BOX	Cheshire, Hillsborough	29 hr
Sep 23, 1:18 PM EDT	Mesoscale Discussion	SPC	Coos, Grafton, Sullivan	57 min
Sep 25, 3:48 AM EDT	Frost Advisory	GYX	Belknap, Carroll, Grafton, Merrimack, Rockingham, Strafford and 1 more	28 hr
Sep 25, 3:48 AM EDT	Freeze Warning	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Strafford and 1 more	28 hr
Sep 25, 4:38 AM EDT	Frost Advisory	BOX	Cheshire, Hillsborough	27 hr
Sep 25, 4:23 PM EDT	Freeze Warning	BOX	Cheshire, Hillsborough	16 hr
Oct 6, 3:28 PM EDT	Wind Advisory	BOX	Cheshire, Hillsborough	36 hr
Oct 10, 3:08 AM EDT	Frost Advisory	BOX	Cheshire, Hillsborough	29 hr
Oct 11, 2:59 AM EDT	Frost Advisory	GYX	Rockingham	28 hr
Oct 11, 3:05 AM EDT	Frost Advisory	BOX	Hillsborough	29 hr
Oct 11, 3:05 AM EDT	Freeze Warning	BOX	Cheshire, Hillsborough	29 hr
Oct 13, 3:27 AM EDT	Winter Weather Advisory	GYX	Coos	8 hr
Oct 14, 2:55 AM EDT	Freeze Warning	GYX	Rockingham	31 hr
Oct 14, 4:09 AM EDT	Freeze Warning	BOX	Hillsborough	28 hr
Oct 16, 9:26 AM EDT	Coastal Flood Warning	GYX	Rockingham	3 hr
Oct 16, 3:03 PM EDT	Coastal Flood Advisory	GYX	Rockingham	9 hr
Oct 17, 3:31 AM EDT	Coastal Flood Watch	GYX	Rockingham	29 hr
Oct 17, 3:11 PM EDT	Coastal Flood Warning	GYX	Rockingham	21 hr
Oct 18, 4:42 AM EDT	Winter Weather Advisory	BOX	Hillsborough	19 hr
Oct 24, 9:04 PM EDT	River Flood Warning	GYX	Grafton	7 hr
Oct 24, 9:04 PM EDT	River Flood Warning	GYX	Grafton	12 hr
Oct 24, 9:26 PM EDT	Areal Flood Advisory	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	6 hr
Oct 31, 3:01 AM EDT	Wind Advisory	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 1 more	21 hr
Nov 14, 3:21 AM EST	Coastal Flood Statement	GYX	Rockingham	37 hr
Nov 15, 7:09 PM EST	Dense Fog Advisory	BOX	Cheshire, Hillsborough	6 hr
Nov 27, 3:50 AM EST	Winter Weather Advisory	GYX	Coos, Grafton, Sullivan	30 hr
Nov 27, 4:10 AM EST	Wind Advisory	BOX	Cheshire, Hillsborough	34 hr
Nov 28, 2:37 AM EST	Wind Advisory	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	15 hr
Nov 28, 8:40 AM EST	High Wind Warning	BOX	Cheshire, Hillsborough	6 hr
Dec 2, 3:15 AM EST	Coastal Flood Watch	GYX	Rockingham	24 hr
Dec 2, 2:36 PM EST	Wind Advisory	GYX	Rockingham	22 hr
Dec 2, 3:00 PM EST	Coastal Flood Warning	GYX	Rockingham	21 hr
Dec 2, 4:25 PM EST	Wind Advisory	BOX	Cheshire, Hillsborough	18 hr
Dec 3, 5:38 AM EST	Areal Flood Advisory	BOX	Cheshire, Hillsborough	112 min
Dec 5, 4:36 AM EST	Winter Weather Advisory	BOX	Cheshire, Hillsborough	22 hr
Dec 5, 12:40 PM EST	Winter Weather Advisory	GYX	Belknap, Merrimack, Rockingham, Strafford, Sullivan	17 hr
Dec 8, 3:14 AM EST	Winter Storm Watch	BOX	Cheshire, Hillsborough	13 hr
Dec 8, 3:19 AM EST	Winter Storm Watch	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	13 hr
Dec 8, 3:59 PM EST	Winter Storm Warning	BOX	Cheshire, Hillsborough	21 hr
Dec 8, 3:59 PM EST	Winter Weather Advisory	BOX	Hillsborough	19 hr
Dec 8, 4:13 PM EST	Winter Storm Warning	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	30 hr
Dec 8, 4:13 PM EST	Winter Weather Advisory	GYX	Rockingham	11 hr
Dec 9, 3:47 AM EST	Coastal Flood Statement	GYX	Rockingham	11 hr
Dec 9, 6:33 AM EST	Mesoscale Discussion	SPC	Belknap, Carroll, Cheshire, Coos, Grafton, Hillsborough and 4 more	3 hr
Dec 9, 1:15 PM EST	Winter Weather Advisory	BOX	Cheshire, Hillsborough	3 hr
Dec 9, 2:43 PM EST	Coastal Flood Statement	GYX	Rockingham	36 min
Dec 9, 2:43 PM EST	Coastal Flood Advisory	GYX	Rockingham	4 hr
Dec 9, 4:28 PM EST	Coastal Flood Warning	GYX	Rockingham	3 hr
Dec 9, 9:14 PM EST	Coastal Flood Statement	GYX	Rockingham	10 hr
Dec 11, 3:30 AM EST	Wind Advisory	GYX	Coos	16 hr
Dec 13, 12:38 PM EST	Winter Weather Advisory	GYX	Belknap, Carroll, Grafton, Merrimack, Rockingham, Strafford and 1 more	10 hr
Dec 13, 1:48 PM EST	Winter Weather Advisory	BOX	Cheshire	7 hr
Dec 16, 3:00 PM EST	Wind Chill Advisory	GYX	Coos, Grafton	21 hr
Dec 17, 3:19 PM EST	Wind Chill Advisory	GYX	Coos	18 hr
Dec 19, 4:23 AM EST	Winter Storm Watch	BOX	Cheshire, Hillsborough	12 hr
Dec 19, 2:22 PM EST	Winter Weather Advisory	GYX	Rockingham	24 hr
Dec 19, 4:21 PM EST	Winter Weather Advisory	BOX	Cheshire, Hillsborough	12 hr
Dec 25, 4:25 PM EST	Freezing Rain Advisory	BOX	Cheshire, Hillsborough	3 hr
Dec 25, 7:09 PM EST	Winter Weather Advisory	BOX	Cheshire, Hillsborough	27 hr
Dec 26, 3:23 AM EST	Winter Weather Advisory	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	24 hr
Dec 27, 7:15 PM EST	River Flood Warning	GYX	Merrimack	25 hr
Dec 28, 3:36 AM EST	Winter Weather Advisory	GYX	Carroll, Coos, Grafton	22 hr
Dec 29, 3:26 AM EST	Wind Advisory	GYX	Belknap, Carroll, Coos, Grafton, Merrimack, Rockingham and 2 more	16 hr
Dec 29, 4:04 AM EST	Wind Advisory	BOX	Cheshire, Hillsborough	21 hr
Dec 29, 11:13 AM EST	Wind Chill Advisory	GYX	Belknap, Carroll, Coos, Grafton	16 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	67
Tornado Warning	2
Severe Thunderstorm Watch	5
Tornado Watch	1
Mesoscale Discussion	28
Flooding
Areal Flood Warning	3
Flash Flood Warning	7
River Flood Warning	6
Flash Flood Watch	8
Flood Watch	8
Areal Flood Advisory	60
Winter
Winter Storm Warning	16
Winter Storm Watch	16
Freezing Rain Advisory	1
Winter Weather Advisory	30
Cold
Freeze Warning	9
Frost Advisory	16
Wind Chill Advisory	6
Wind and dust
High Wind Warning	1
Wind Advisory	11
Fire
Red Flag Warning	10
Fire Weather Watch	9
Fog and smoke
Dense Fog Advisory	1
Coast and beach
Coastal Flood Warning	7
Coastal Flood Watch	2
Coastal Flood Advisory	4
High Surf Advisory	1
Coastal Flood Statement	11

By county

Every county with at least one alert. A county page lists each alert that covered it.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record The radar archive 2008 2010

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.