Alert archive / New Jersey / Salem County

Weather alerts in Salem County, New Jersey, 2018

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

Salem County and its neighbors

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

Alerts: 201
Warnings: 39
Watches: 32
Advisories: 97
Busiest month: May31 alerts
Busiest day: July 27, 201811 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Salem County, 2018

	Warnings	With a report	False alarm ratio
Tornado warnings	0
Severe thunderstorm warnings	12	4	67%
Flash flood warnings	6	2	67%

Each office's whole area, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Philadelphia/Mount Holly: tornado warnings	10	2	80%	4	50%	6 min
NWS Philadelphia/Mount Holly: severe thunderstorm warnings	110	56	49%	277	81%	27 min
NWS Philadelphia/Mount Holly: flash flood warnings	113	54	52%	174	94%	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 3, 4:03 AM EST	Winter Storm Warning	PHI	38 hr
Jan 3, 4:03 AM EST	Winter Weather Advisory	PHI	38 hr
Jan 4, 3:48 AM EST	Wind Chill Advisory	PHI	3 days
Jan 7, 2:50 PM EST	Winter Weather Advisory	PHI	33 hr
Jan 23, 10:42 AM EST	Special Weather Statement	PHI	48 min
Jan 29, 3:13 PM EST	Coastal Flood Advisory	PHI	21 hr
Feb 4, 6:01 PM EST	Areal Flood Advisory	PHI	4 hr
Feb 6, 3:37 PM EST	Winter Weather Advisory	PHI	27 hr
Feb 10, 3:20 AM EST	Flood Watch	PHI	39 hr
Feb 10, 10:58 PM EST	Areal Flood Advisory	PHI	4 hr
Feb 10, 11:01 PM EST	Dense Fog Advisory	PHI	8 hr
Feb 11, 6:01 AM EST	Areal Flood Advisory	PHI	18 hr
Feb 11, 7:53 AM EST	Areal Flood Advisory	PHI	16 hr
Feb 11, 10:57 AM EST	Areal Flood Advisory	PHI	12 hr
Feb 12, 9:31 PM EST	Areal Flood Warning	PHI	31 hr
Feb 14, 4:16 AM EST	Areal Flood Warning	PHI	16 hr
Feb 17, 3:45 AM EST	Winter Weather Advisory	PHI	20 hr
Feb 19, 11:00 PM EST	Dense Fog Advisory	PHI	11 hr
Feb 28, 3:12 PM EST	High Wind Watch	PHI	24 hr
Mar 1, 11:44 AM EST	High Wind Warning	PHI	40 hr
Mar 1, 3:30 PM EST	Wind Advisory	PHI	45 hr
Mar 2, 2:26 AM EST	Areal Flood Advisory	PHI	4 hr
Mar 5, 3:34 AM EST	Winter Storm Watch	PHI	36 hr
Mar 6, 3:37 AM EST	Winter Storm Warning	PHI	41 hr
Mar 6, 2:30 PM EST	Coastal Flood Advisory	PHI	15 hr
Mar 6, 2:30 PM EST	Coastal Flood Advisory	PHI	37 hr
Mar 6, 3:40 PM EST	Winter Weather Advisory	PHI	12 hr
Mar 19, 3:36 PM EDT	Winter Storm Watch	PHI	13 hr
Mar 19, 3:36 PM EDT	Winter Weather Advisory	PHI	13 hr
Mar 20, 2:40 AM EDT	Coastal Flood Advisory	PHI	50 hr
Mar 20, 4:41 AM EDT	Winter Storm Warning	PHI	47 hr
Mar 20, 12:19 PM EDT	Mesoscale Discussion	SPC	4 hr
Mar 30, 1:40 PM EDT	Special Weather Statement	PHI	50 min
Mar 30, 2:34 PM EDT	Special Weather Statement	PHI	41 min
Apr 1, 4:08 AM EDT	Winter Weather Advisory	PHI	33 hr
Apr 3, 3:32 PM EDT	Wind Advisory	PHI	28 hr
Apr 4, 12:01 AM EDT	Dense Fog Advisory	PHI	10 hr
Apr 4, 12:39 PM EDT	Severe Thunderstorm Warning	PHI	51 min
Apr 15, 6:08 AM EDT	Coastal Flood Advisory	PHI	39 hr
Apr 15, 2:44 PM EDT	Coastal Flood Warning	PHI	23 hr
Apr 16, 5:34 AM EDT	Areal Flood Advisory	PHI	4 hr
Apr 16, 7:04 AM EDT	Flash Flood Warning	PHI	4 hr
Apr 17, 2:36 PM EDT	Freeze Warning	PHI	17 hr
Apr 20, 3:35 PM EDT	Frost Advisory	PHI	16 hr
Apr 28, 5:16 AM EDT	Dense Fog Advisory	PHI	4 hr
Apr 29, 3:32 PM EDT	Fire Weather Watch	PHI	12 hr
Apr 30, 3:31 AM EDT	Red Flag Warning	PHI	16 hr
May 1, 2:59 PM EDT	Fire Weather Watch	PHI	13 hr
May 2, 3:42 AM EDT	Red Flag Warning	PHI	17 hr
May 3, 3:35 AM EDT	Red Flag Warning	PHI	16 hr
May 4, 10:28 PM EDT	Special Weather Statement	PHI	62 min
May 10, 8:58 PM EDT	Special Weather Statement	PHI	47 min
May 12, 3:59 PM EDT	Mesoscale Discussion	SPC	3 hr
May 12, 4:58 PM EDT	Tornado Watch	SPC	5 hr
May 12, 7:00 PM EDT	Severe Thunderstorm Warning	PHI	45 min
May 12, 7:16 PM EDT	Severe Thunderstorm Warning	PHI	44 min
May 12, 7:16 PM EDT	Mesoscale Discussion	SPC	59 min
May 12, 7:30 PM EDT	Severe Thunderstorm Warning	PHI	45 min
May 12, 7:45 PM EDT	Severe Thunderstorm Warning	PHI	45 min
May 12, 8:00 PM EDT	Areal Flood Advisory	PHI	3 hr
May 13, 10:42 PM EDT	Special Weather Statement	PHI	63 min
May 15, 3:40 AM EDT	Flash Flood Watch	PHI	21 hr
May 15, 1:46 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
May 15, 3:33 PM EDT	Mesoscale Discussion	SPC	117 min
May 15, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	67 min
May 15, 6:10 PM EDT	Areal Flood Advisory	PHI	4 hr
May 15, 6:35 PM EDT	Severe Thunderstorm Warning	PHI	40 min
May 15, 6:46 PM EDT	Special Weather Statement	PHI	74 min
May 15, 6:58 PM EDT	Areal Flood Advisory	PHI	4 hr
May 15, 7:18 PM EDT	Severe Thunderstorm Warning	PHI	57 min
May 16, 3:35 PM EDT	Flood Watch	PHI	3 days
May 17, 2:32 AM EDT	Areal Flood Advisory	PHI	4 hr
May 17, 6:29 AM EDT	Areal Flood Advisory	PHI	2 hr
May 18, 4:04 AM EDT	Coastal Flood Advisory	PHI	27 hr
May 19, 3:07 PM EDT	Special Weather Statement	PHI	68 min
May 26, 11:38 PM EDT	Flash Flood Watch	PHI	23 hr
May 27, 3:22 PM EDT	Coastal Flood Advisory	PHI	12 hr
May 30, 4:43 AM EDT	Dense Fog Advisory	PHI	4 hr
Jun 2, 3:26 AM EDT	Flash Flood Watch	PHI	24 hr
Jun 2, 6:44 PM EDT	Areal Flood Advisory	PHI	3 hr
Jun 3, 6:16 PM EDT	Areal Flood Advisory	PHI	3 hr
Jun 5, 3:05 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 3:48 AM EDT	Flash Flood Watch	PHI	28 hr
Jun 11, 1:16 AM EDT	Areal Flood Advisory	PHI	8 hr
Jun 11, 3:16 AM EDT	Areal Flood Advisory	PHI	8 hr
Jun 24, 6:16 PM EDT	Mesoscale Discussion	SPC	119 min
Jun 29, 3:41 PM EDT	Heat Advisory	PHI	5 days
Jul 3, 3:28 PM EDT	Special Weather Statement	PHI	62 min
Jul 5, 2:59 PM EDT	Flash Flood Watch	PHI	20 hr
Jul 20, 2:44 PM EDT	Flash Flood Watch	PHI	34 hr
Jul 21, 5:25 AM EDT	Coastal Flood Advisory	PHI	15 hr
Jul 23, 3:45 AM EDT	Flash Flood Watch	PHI	68 hr
Jul 23, 1:01 PM EDT	Areal Flood Advisory	PHI	34 min
Jul 23, 2:40 PM EDT	Mesoscale Discussion	SPC	3 hr
Jul 24, 12:56 AM EDT	Areal Flood Advisory	PHI	4 hr
Jul 24, 4:56 AM EDT	Areal Flood Advisory	PHI	4 hr
Jul 25, 4:34 PM EDT	Areal Flood Advisory	PHI	2 hr
Jul 25, 8:24 PM EDT	Areal Flood Advisory	PHI	2 hr
Jul 27, 9:29 AM EDT	Special Weather Statement	PHI	61 min
Jul 27, 9:50 AM EDT	Flash Flood Watch	PHI	13 hr
Jul 27, 1:15 PM EDT	Special Weather Statement	PHI	45 min
Jul 27, 1:17 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 27, 2:14 PM EDT	Severe Thunderstorm Warning	PHI	46 min
Jul 27, 2:26 PM EDT	Areal Flood Advisory	PHI	6 hr
Jul 27, 2:59 PM EDT	Severe Thunderstorm Warning	PHI	46 min
Jul 27, 3:09 PM EDT	Areal Flood Advisory	PHI	6 hr
Jul 27, 4:18 PM EDT	Severe Thunderstorm Warning	PHI	42 min
Jul 27, 4:50 PM EDT	Mesoscale Discussion	SPC	55 min
Jul 27, 7:06 PM EDT	Mesoscale Discussion	SPC	54 min
Aug 1, 11:35 PM EDT	Severe Thunderstorm Warning	PHI	20 min
Aug 3, 3:33 PM EDT	Special Weather Statement	PHI	57 min
Aug 3, 4:31 PM EDT	Special Weather Statement	PHI	59 min
Aug 10, 5:10 PM EDT	Coastal Flood Advisory	PHI	11 hr
Aug 11, 3:24 AM EDT	Flash Flood Watch	PHI	20 hr
Aug 11, 4:26 AM EDT	Coastal Flood Advisory	PHI	24 hr
Aug 11, 5:00 PM EDT	Areal Flood Advisory	PHI	3 hr
Aug 11, 6:12 PM EDT	Flash Flood Warning	PHI	3 hr
Aug 11, 9:11 PM EDT	Areal Flood Advisory	PHI	81 min
Aug 12, 5:28 AM EDT	Coastal Flood Advisory	PHI	24 hr
Aug 12, 6:17 PM EDT	Areal Flood Advisory	PHI	118 min
Aug 12, 6:32 PM EDT	Flash Flood Warning	PHI	112 min
Aug 12, 10:08 PM EDT	Flash Flood Watch	PHI	24 hr
Aug 13, 8:03 AM EDT	Areal Flood Advisory	PHI	4 hr
Aug 13, 9:14 AM EDT	Areal Flood Advisory	PHI	4 hr
Aug 18, 12:56 AM EDT	Areal Flood Advisory	PHI	4 hr
Aug 18, 3:16 AM EDT	Flash Flood Watch	PHI	20 hr
Aug 22, 1:54 AM EDT	Areal Flood Advisory	PHI	4 hr
Aug 27, 2:58 AM EDT	Heat Advisory	PHI	65 hr
Sep 2, 3:38 PM EDT	Areal Flood Advisory	PHI	69 min
Sep 2, 3:52 PM EDT	Flash Flood Warning	PHI	3 hr
Sep 7, 8:32 PM EDT	Flash Flood Warning	PHI	2 hr
Sep 7, 11:20 PM EDT	Areal Flood Warning	PHI	4 hr
Sep 8, 3:34 AM EDT	Flood Watch	PHI	60 hr
Sep 8, 5:31 AM EDT	Coastal Flood Advisory	PHI	21 hr
Sep 8, 8:15 AM EDT	Areal Flood Advisory	PHI	119 min
Sep 8, 4:49 PM EDT	Coastal Flood Watch	PHI	7 hr
Sep 9, 12:05 AM EDT	Coastal Flood Warning	PHI	54 hr
Sep 9, 5:04 AM EDT	Coastal Flood Watch	PHI	11 hr
Sep 10, 5:02 AM EDT	Coastal Flood Watch	PHI	11 hr
Sep 10, 4:08 PM EDT	Coastal Flood Advisory	PHI	13 hr
Sep 11, 4:40 AM EDT	Coastal Flood Advisory	PHI	10 hr
Sep 11, 3:08 PM EDT	Areal Flood Advisory	PHI	3 hr
Sep 12, 2:05 AM EDT	Dense Fog Advisory	PHI	8 hr
Sep 12, 4:39 PM EDT	Areal Flood Warning	PHI	16 hr
Sep 18, 4:13 AM EDT	Special Weather Statement	PHI	92 min
Sep 18, 9:27 AM EDT	Flash Flood Watch	PHI	6 hr
Sep 18, 12:36 PM EDT	Areal Flood Advisory	PHI	3 hr
Sep 24, 4:27 AM EDT	Coastal Flood Advisory	PHI	42 hr
Sep 26, 5:02 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Sep 27, 3:24 AM EDT	Flood Watch	PHI	27 hr
Sep 28, 3:23 AM EDT	Areal Flood Advisory	PHI	4 hr
Oct 3, 12:00 AM EDT	Special Weather Statement	PHI	60 min
Oct 6, 5:31 AM EDT	Coastal Flood Advisory	PHI	21 hr
Oct 10, 2:59 AM EDT	Dense Fog Advisory	PHI	6 hr
Oct 10, 3:16 PM EDT	Flash Flood Watch	PHI	38 hr
Oct 11, 3:24 AM EDT	Wind Advisory	PHI	31 hr
Oct 11, 5:45 PM EDT	Areal Flood Advisory	PHI	77 min
Oct 11, 8:09 PM EDT	Special Weather Statement	PHI	36 min
Oct 11, 8:27 PM EDT	Areal Flood Advisory	PHI	8 hr
Oct 11, 8:41 PM EDT	Special Weather Statement	PHI	34 min
Oct 11, 9:10 PM EDT	Special Weather Statement	PHI	35 min
Oct 11, 10:45 PM EDT	Areal Flood Advisory	PHI	3 hr
Oct 12, 12:08 AM EDT	Flash Flood Warning	PHI	4 hr
Oct 12, 3:46 AM EDT	Areal Flood Warning	PHI	7 hr
Oct 15, 11:39 PM EDT	Special Weather Statement	PHI	36 min
Oct 16, 12:01 AM EDT	Special Weather Statement	PHI	44 min
Oct 18, 3:05 AM EDT	Frost Advisory	PHI	30 hr
Oct 20, 10:38 PM EDT	Special Weather Statement	PHI	22 min
Oct 20, 10:58 PM EDT	Special Weather Statement	PHI	32 min
Oct 21, 3:07 AM EDT	Frost Advisory	PHI	30 hr
Oct 24, 3:12 PM EDT	Frost Advisory	PHI	18 hr
Oct 26, 3:20 PM EDT	Coastal Flood Advisory	PHI	27 hr
Nov 2, 6:55 PM EDT	Mesoscale Discussion	SPC	95 min
Nov 3, 12:13 AM EDT	Special Weather Statement	PHI	62 min
Nov 5, 1:55 PM EST	Areal Flood Advisory	PHI	4 hr
Nov 6, 4:32 AM EST	Coastal Flood Advisory	PHI	11 hr
Nov 6, 11:47 AM EST	Areal Flood Advisory	PHI	2 hr
Nov 9, 3:23 AM EST	Coastal Flood Advisory	PHI	11 hr
Nov 9, 2:03 PM EST	Freeze Warning	PHI	43 hr
Nov 9, 4:42 PM EST	Areal Flood Advisory	PHI	4 hr
Nov 14, 3:31 PM EST	Winter Weather Advisory	PHI	29 hr
Nov 24, 6:40 PM EST	Areal Flood Advisory	PHI	6 hr
Nov 25, 3:25 PM EST	Coastal Flood Advisory	PHI	34 hr
Nov 25, 3:35 PM EST	Flood Watch	PHI	27 hr
Nov 26, 3:40 PM EST	Areal Flood Warning	PHI	44 hr
Nov 27, 3:13 PM EST	Wind Advisory	PHI	27 hr
Nov 28, 11:45 AM EST	Areal Flood Warning	PHI	14 hr
Dec 2, 3:17 AM EST	Coastal Flood Advisory	PHI	9 hr
Dec 2, 8:24 AM EST	Dense Fog Advisory	PHI	21 hr
Dec 5, 2:40 AM EST	Winter Weather Advisory	PHI	15 hr
Dec 16, 12:28 PM EST	Areal Flood Advisory	PHI	4 hr
Dec 16, 5:09 PM EST	Areal Flood Advisory	PHI	3 hr
Dec 18, 3:16 PM EST	Flood Watch	PHI	3 days
Dec 19, 3:24 PM EST	Wind Advisory	PHI	39 hr
Dec 20, 3:39 PM EST	Coastal Flood Advisory	PHI	22 hr
Dec 21, 4:50 AM EST	Areal Flood Warning	PHI	4 hr
Dec 21, 8:26 AM EST	Areal Flood Warning	PHI	4 hr
Dec 27, 3:13 PM EST	Flood Watch	PHI	28 hr
Dec 28, 11:23 AM EST	Areal Flood Advisory	PHI	8 hr
Dec 28, 3:04 PM EST	Areal Flood Advisory	PHI	4 hr
Dec 29, 6:42 AM EST	Areal Flood Warning	PHI	4 days

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	12
Severe Thunderstorm Watch	3
Tornado Watch	1
Mesoscale Discussion	10
Special Weather Statement	23
Flooding
Areal Flood Warning	10
Flash Flood Warning	6
Flash Flood Watch	13
Flood Watch	7
Areal Flood Advisory	46
Winter
Winter Storm Warning	3
Winter Storm Watch	2
Winter Weather Advisory	9
Heat
Heat Advisory	2
Cold
Freeze Warning	2
Frost Advisory	4
Wind Chill Advisory	1
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	5
Fire
Red Flag Warning	3
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	8
Coast and beach
Coastal Flood Warning	2
Coastal Flood Watch	3
Coastal Flood Advisory	22

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.