Alert archive / New Hampshire / Strafford County

Weather alerts in Strafford County, New Hampshire, 2018

154 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Strafford County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts: 154
Warnings: 35
Watches: 17
Advisories: 60
Busiest month: July28 alerts
Busiest day: August 3, 201812 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 1 tornado warnings covering Strafford County in 2018 had a tornado report inside them.

Strafford County, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	19	16	16%	9	89%	47 min
Flash flood warnings	2	0	100%	0

Each office's whole area, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Gray, ME: tornado warnings	8	1	88%	3	33%	20 min
NWS Gray, ME: severe thunderstorm warnings	104	78	25%	223	84%	24 min
NWS Gray, ME: flash flood warnings	16	7	56%	21	76%	73 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, 2:51 PM EST	Winter Storm Watch	GYX	24 hr
Jan 3, 3:54 AM EST	Blizzard Warning	GYX	47 hr
Jan 3, 3:11 PM EST	Winter Storm Warning	GYX	36 hr
Jan 4, 11:34 AM EST	Mesoscale Discussion	SPC	5 hr
Jan 4, 2:58 PM EST	Wind Chill Watch	GYX	12 hr
Jan 5, 3:04 AM EST	Wind Chill Warning	GYX	55 hr
Jan 5, 3:04 AM EST	Wind Chill Advisory	GYX	55 hr
Jan 10, 2:57 AM EST	Winter Weather Advisory	GYX	27 hr
Jan 11, 3:44 PM EST	Flood Watch	GYX	44 hr
Jan 12, 4:34 AM EST	Winter Weather Advisory	GYX	33 hr
Jan 12, 7:59 AM EST	Dense Fog Advisory	GYX	21 hr
Jan 15, 3:07 PM EST	Winter Storm Watch	GYX	12 hr
Jan 16, 3:33 AM EST	Winter Storm Warning	GYX	39 hr
Jan 16, 3:33 AM EST	Winter Weather Advisory	GYX	39 hr
Jan 21, 2:57 PM EST	Flood Watch	GYX	48 hr
Jan 22, 3:06 AM EST	Winter Weather Advisory	GYX	41 hr
Jan 22, 3:25 PM EST	Mesoscale Discussion	SPC	6 hr
Feb 5, 3:14 PM EST	Winter Storm Watch	GYX	24 hr
Feb 6, 3:18 PM EST	Winter Storm Warning	GYX	32 hr
Feb 7, 11:25 AM EST	Mesoscale Discussion	SPC	6 hr
Feb 7, 6:21 PM EST	Mesoscale Discussion	SPC	4 hr
Feb 10, 7:48 PM EST	Dense Fog Advisory	GYX	8 hr
Feb 17, 3:21 AM EST	Winter Weather Advisory	GYX	30 hr
Feb 20, 3:22 PM EST	Dense Fog Advisory	GYX	21 hr
Feb 24, 3:18 PM EST	Winter Weather Advisory	GYX	27 hr
Feb 26, 7:18 AM EST	Dense Fog Advisory	GYX	102 min
Mar 1, 3:24 PM EST	Wind Advisory	GYX	30 hr
Mar 2, 3:14 AM EST	Winter Weather Advisory	GYX	16 hr
Mar 5, 3:36 AM EST	Winter Storm Watch	GYX	24 hr
Mar 6, 3:38 AM EST	Winter Storm Warning	GYX	63 hr
Mar 8, 2:31 AM EST	Special Weather Statement	GYX	89 min
Mar 11, 3:49 AM EDT	Winter Storm Watch	GYX	24 hr
Mar 12, 3:41 AM EDT	Winter Storm Warning	GYX	66 hr
Mar 13, 2:15 PM EDT	Special Weather Statement	GYX	3 hr
Mar 13, 5:42 PM EDT	Special Weather Statement	GYX	93 min
Mar 13, 7:15 PM EDT	Special Weather Statement	GYX	2 hr
Mar 13, 11:44 PM EDT	Winter Weather Advisory	GYX	19 hr
Mar 28, 6:07 AM EDT	Special Weather Statement	GYX	113 min
Mar 30, 3:45 AM EDT	Dense Fog Advisory	GYX	6 hr
Apr 3, 4:10 PM EDT	Wind Advisory	GYX	36 hr
Apr 11, 4:46 AM EDT	Dense Fog Advisory	GYX	2 hr
Apr 14, 3:44 PM EDT	Winter Weather Advisory	GYX	56 hr
Apr 16, 5:14 PM EDT	Areal Flood Advisory	GYX	3 hr
May 3, 12:07 PM EDT	Special Weather Statement	GYX	38 min
May 3, 12:43 PM EDT	Special Weather Statement	GYX	47 min
May 4, 7:54 PM EDT	Mesoscale Discussion	SPC	3 hr
May 4, 9:59 PM EDT	Special Weather Statement	GYX	46 min
May 4, 10:06 PM EDT	Severe Thunderstorm Warning	GYX	32 min
May 8, 4:37 AM EDT	Dense Fog Advisory	GYX	4 hr
May 9, 3:10 PM EDT	Dense Fog Advisory	GYX	17 hr
May 11, 3:11 AM EDT	Frost Advisory	GYX	28 hr
May 15, 1:58 PM EDT	Mesoscale Discussion	SPC	2 hr
May 15, 3:02 PM EDT	Special Weather Statement	GYX	73 min
May 15, 5:10 PM EDT	Special Weather Statement	GYX	50 min
May 26, 1:09 PM EDT	Mesoscale Discussion	SPC	3 hr
Jun 17, 2:51 PM EDT	Heat Advisory	GYX	27 hr
Jun 18, 2:49 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 18, 5:51 PM EDT	Severe Thunderstorm Warning	GYX	54 min
Jun 18, 6:17 PM EDT	Severe Thunderstorm Warning	GYX	43 min
Jun 18, 7:05 PM EDT	Mesoscale Discussion	SPC	55 min
Jun 28, 5:17 PM EDT	Special Weather Statement	GYX	58 min
Jun 28, 10:22 PM EDT	Dense Fog Advisory	GYX	8 hr
Jul 1, 2:37 PM EDT	Heat Advisory	GYX	28 hr
Jul 2, 8:17 PM EDT	Heat Advisory	GYX	23 hr
Jul 4, 3:22 PM EDT	Heat Advisory	GYX	29 hr
Jul 5, 4:56 PM EDT	Special Weather Statement	GYX	49 min
Jul 10, 5:48 PM EDT	Severe Thunderstorm Warning	GYX	57 min
Jul 15, 2:18 PM EDT	Severe Thunderstorm Warning	GYX	37 min
Jul 16, 4:21 AM EDT	Dense Fog Advisory	GYX	6 hr
Jul 16, 3:26 PM EDT	Dense Fog Advisory	GYX	18 hr
Jul 17, 2:58 AM EDT	Flash Flood Watch	GYX	14 hr
Jul 17, 10:35 AM EDT	Mesoscale Discussion	SPC	115 min
Jul 17, 10:54 AM EDT	Severe Thunderstorm Warning	GYX	66 min
Jul 17, 11:17 AM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 17, 12:27 PM EDT	Severe Thunderstorm Warning	GYX	48 min
Jul 17, 12:33 PM EDT	Areal Flood Advisory	GYX	117 min
Jul 17, 3:11 PM EDT	Areal Flood Advisory	GYX	2 hr
Jul 26, 2:59 AM EDT	Mesoscale Discussion	SPC	2 hr
Jul 27, 1:31 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 27, 4:50 PM EDT	Mesoscale Discussion	SPC	55 min
Jul 27, 7:06 PM EDT	Mesoscale Discussion	SPC	54 min
Jul 28, 2:28 PM EDT	Special Weather Statement	GYX	47 min
Jul 28, 2:58 PM EDT	Severe Thunderstorm Warning	GYX	47 min
Jul 28, 3:03 PM EDT	Mesoscale Discussion	SPC	57 min
Jul 28, 3:37 PM EDT	Severe Thunderstorm Warning	GYX	38 min
Jul 28, 3:55 PM EDT	Severe Thunderstorm Warning	GYX	50 min
Jul 28, 4:48 PM EDT	Severe Thunderstorm Warning	GYX	57 min
Jul 28, 5:31 PM EDT	Severe Thunderstorm Warning	GYX	44 min
Jul 28, 5:58 PM EDT	Severe Thunderstorm Warning	GYX	47 min
Jul 28, 8:02 PM EDT	Areal Flood Advisory	GYX	118 min
Aug 2, 3:48 AM EDT	Heat Advisory	GYX	14 hr
Aug 3, 8:56 AM EDT	Heat Advisory	GYX	10 hr
Aug 3, 11:45 AM EDT	Mesoscale Discussion	SPC	2 hr
Aug 3, 1:34 PM EDT	Special Weather Statement	GYX	41 min
Aug 3, 1:41 PM EDT	Severe Thunderstorm Warning	GYX	32 min
Aug 3, 4:15 PM EDT	Mesoscale Discussion	SPC	60 min
Aug 3, 4:22 PM EDT	Areal Flood Advisory	GYX	113 min
Aug 3, 4:31 PM EDT	Severe Thunderstorm Warning	GYX	20 min
Aug 3, 4:49 PM EDT	Severe Thunderstorm Warning	GYX	41 min
Aug 3, 5:24 PM EDT	Severe Thunderstorm Warning	GYX	66 min
Aug 3, 5:26 PM EDT	Tornado Warning	GYX	34 min
Aug 3, 5:40 PM EDT	Flash Flood Warning	GYX	118 min
Aug 3, 5:48 PM EDT	Severe Thunderstorm Warning	GYX	42 min
Aug 5, 3:23 PM EDT	Heat Advisory	GYX	51 hr
Aug 7, 1:03 PM EDT	Mesoscale Discussion	SPC	117 min
Aug 8, 8:29 PM EDT	Flash Flood Warning	GYX	95 min
Aug 14, 3:31 PM EDT	Areal Flood Advisory	GYX	3 hr
Aug 14, 3:34 PM EDT	Special Weather Statement	GYX	41 min
Aug 14, 4:08 PM EDT	Special Weather Statement	GYX	37 min
Aug 17, 8:58 PM EDT	Severe Thunderstorm Warning	GYX	23 min
Aug 21, 6:01 AM EDT	Dense Fog Advisory	GYX	3 hr
Aug 27, 2:59 AM EDT	Heat Advisory	GYX	65 hr
Sep 2, 2:46 PM EDT	Heat Advisory	GYX	29 hr
Sep 6, 12:09 PM EDT	Mesoscale Discussion	SPC	3 hr
Sep 6, 12:31 PM EDT	Special Weather Statement	GYX	59 min
Sep 6, 1:17 PM EDT	Special Weather Statement	GYX	58 min
Sep 14, 3:14 AM EDT	Dense Fog Advisory	GYX	3 hr
Sep 14, 3:02 PM EDT	Dense Fog Advisory	GYX	18 hr
Sep 15, 3:07 PM EDT	Dense Fog Advisory	GYX	18 hr
Sep 26, 9:20 PM EDT	Special Weather Statement	GYX	55 min
Oct 5, 2:35 AM EDT	Frost Advisory	GYX	25 hr
Oct 13, 3:05 AM EDT	Frost Advisory	GYX	29 hr
Oct 13, 3:05 AM EDT	Freeze Warning	GYX	29 hr
Oct 17, 3:03 PM EDT	Wind Advisory	GYX	21 hr
Oct 17, 4:44 PM EDT	Special Weather Statement	GYX	31 min
Oct 18, 3:24 PM EDT	Freeze Warning	GYX	18 hr
Oct 23, 5:13 PM EDT	Special Weather Statement	GYX	62 min
Nov 2, 3:46 AM EDT	High Wind Watch	GYX	24 hr
Nov 3, 12:11 AM EDT	Flood Watch	GYX	11 hr
Nov 3, 3:55 AM EDT	High Wind Warning	GYX	15 hr
Nov 3, 4:37 AM EDT	Areal Flood Advisory	GYX	4 hr
Nov 8, 2:50 PM EST	Flood Watch	GYX	36 hr
Nov 10, 2:57 AM EST	Wind Advisory	GYX	28 hr
Nov 13, 3:02 PM EST	Wind Advisory	GYX	6 hr
Nov 13, 9:17 PM EST	Wind Advisory	GYX	17 hr
Nov 14, 3:00 PM EST	Winter Storm Watch	GYX	12 hr
Nov 15, 3:27 AM EST	Winter Storm Warning	GYX	35 hr
Nov 15, 3:27 AM EST	Winter Weather Advisory	GYX	27 hr
Nov 15, 10:06 PM EST	Mesoscale Discussion	SPC	6 hr
Nov 16, 3:56 AM EST	Mesoscale Discussion	SPC	6 hr
Nov 19, 3:24 PM EST	Winter Weather Advisory	GYX	30 hr
Nov 21, 3:16 PM EST	Snow Squall Warning	GYX	42 min
Nov 21, 3:50 PM EST	Snow Squall Warning	GYX	55 min
Nov 24, 3:02 PM EST	Winter Weather Advisory	GYX	27 hr
Nov 26, 11:05 AM EST	Winter Weather Advisory	GYX	28 hr
Dec 1, 2:39 AM EST	Winter Weather Advisory	GYX	35 hr
Dec 2, 3:30 PM EST	Dense Fog Advisory	GYX	20 hr
Dec 16, 3:11 PM EST	Winter Weather Advisory	GYX	24 hr
Dec 16, 9:24 PM EST	Mesoscale Discussion	SPC	4 hr
Dec 16, 9:36 PM EST	Mesoscale Discussion	SPC	4 hr
Dec 18, 6:22 AM EST	Wind Advisory	GYX	4 hr
Dec 19, 3:50 PM EST	Flood Watch	GYX	65 hr
Dec 27, 3:30 AM EST	Winter Weather Advisory	GYX	42 hr
Dec 28, 3:01 PM EST	Dense Fog Advisory	GYX	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	19
Tornado Warning	1
Severe Thunderstorm Watch	3
Mesoscale Discussion	21
Special Weather Statement	21
Flooding
Flash Flood Warning	2
Flash Flood Watch	1
Flood Watch	5
Areal Flood Advisory	7
Winter
Blizzard Warning	1
Snow Squall Warning	2
Winter Storm Warning	6
Winter Storm Watch	6
Winter Weather Advisory	16
Heat
Heat Advisory	9
Cold
Freeze Warning	2
Wind Chill Warning	1
Wind Chill Watch	1
Frost Advisory	3
Wind Chill Advisory	1
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	7
Fog and smoke
Dense Fog Advisory	17

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2017 2019

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.