Alert archive / Louisiana / Webster Parish

Weather alerts in Webster Parish, Louisiana, 2020

157 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Webster Parish and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts: 157
Warnings: 60
Watches: 18
Advisories: 31
Busiest month: April46 alerts
Busiest day: April 12, 202014 alerts

Over time

By month

Warning verification

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

3 of 7 tornado warnings covering Webster Parish in 2020 had a tornado report inside them; 4 of 4 tornado reports fell inside a warning, on average 18 minutes after it went out.

Webster Parish, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	7	3	57%	4	100%	18 min
Severe thunderstorm warnings	22	17	23%	22	95%	20 min
Flash flood warnings	5	3	40%	3	67%	22 min

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Shreveport, LA: tornado warnings	77	29	62%	67	63%	14 min
NWS Shreveport, LA: severe thunderstorm warnings	252	186	26%	540	79%	24 min
NWS Shreveport, LA: flash flood warnings	55	37	33%	117	90%	105 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 9, 8:39 PM CST	Lake Wind Advisory	SHV	32 hr
Jan 10, 4:55 PM CST	Mesoscale Discussion	SPC	2 hr
Jan 10, 5:34 PM CST	Tornado Watch	SPC	11 hr
Jan 10, 7:30 PM CST	Mesoscale Discussion	SPC	2 hr
Jan 10, 10:40 PM CST	Mesoscale Discussion	SPC	2 hr
Jan 11, 12:28 AM CST	Tornado Watch	SPC	8 hr
Jan 11, 1:19 AM CST	Mesoscale Discussion	SPC	86 min
Jan 11, 1:27 AM CST	Tornado Warning	SHV	28 min
Jan 11, 1:30 AM CST	Severe Thunderstorm Warning	SHV	60 min
Jan 11, 1:48 AM CST	Tornado Warning	SHV	27 min
Jan 11, 4:27 AM CST	Lake Wind Advisory	SHV	12 hr
Jan 11, 5:15 AM CST	River Flood Warning	SHV	11 days
Jan 14, 4:14 AM CST	Areal Flood Advisory	SHV	3 hr
Jan 14, 8:35 PM CST	Dense Fog Advisory	SHV	12 hr
Jan 15, 11:10 PM CST	Dense Fog Advisory	SHV	10 hr
Jan 23, 11:11 AM CST	River Flood Warning	SHV	39 days
Feb 5, 11:27 AM CST	Special Weather Statement	SHV	48 min
Feb 9, 3:56 PM CST	Flash Flood Watch	SHV	71 hr
Feb 10, 9:53 AM CST	River Flood Warning	SHV	21 days
Feb 10, 9:53 AM CST	River Flood Warning	SHV	21 days
Feb 10, 1:44 PM CST	Flash Flood Warning	SHV	3 hr
Feb 10, 6:01 PM CST	Mesoscale Discussion	SPC	89 min
Feb 10, 7:11 PM CST	Areal Flood Advisory	SHV	3 hr
Feb 10, 7:54 PM CST	Flash Flood Warning	SHV	2 hr
Feb 14, 7:00 PM CST	River Flood Warning	SHV	89 days
Feb 23, 1:30 PM CST	Lake Wind Advisory	SHV	29 hr
Feb 26, 2:04 AM CST	Lake Wind Advisory	SHV	16 hr
Mar 1, 4:46 AM CST	Lake Wind Advisory	SHV	13 hr
Mar 4, 1:19 AM CST	Mesoscale Discussion	SPC	2 hr
Mar 4, 4:20 AM CST	Mesoscale Discussion	SPC	115 min
Mar 4, 8:03 AM CST	Severe Thunderstorm Warning	SHV	21 min
Mar 4, 8:44 AM CST	Flash Flood Warning	SHV	3 hr
Mar 5, 9:51 AM CST	River Flood Warning	SHV	10 days
Mar 17, 3:07 AM CDT	Dense Fog Advisory	SHV	7 hr
Mar 19, 10:45 AM CDT	River Flood Warning	SHV	48 days
Mar 19, 2:24 PM CDT	Tornado Watch	SPC	8 hr
Mar 22, 7:14 PM CDT	Dense Fog Advisory	SHV	15 hr
Mar 25, 10:53 AM CDT	River Flood Warning	SHV	4 days
Mar 25, 10:54 AM CDT	River Flood Warning	SHV	5 days
Mar 27, 10:25 AM CDT	River Flood Warning	SHV	5 days
Mar 28, 12:14 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 28, 4:11 PM CDT	Special Weather Statement	SHV	64 min
Apr 11, 10:33 AM CDT	River Flood Warning	SHV	24 hr
Apr 11, 4:42 PM CDT	Special Weather Statement	SHV	48 min
Apr 12, 2:45 AM CDT	Lake Wind Advisory	SHV	21 hr
Apr 12, 5:52 AM CDT	Tornado Watch	SPC	8 hr
Apr 12, 7:18 AM CDT	Mesoscale Discussion	SPC	87 min
Apr 12, 9:12 AM CDT	Severe Thunderstorm Warning	SHV	63 min
Apr 12, 9:15 AM CDT	Severe Thunderstorm Warning	SHV	45 min
Apr 12, 9:30 AM CDT	Mesoscale Discussion	SPC	90 min
Apr 12, 9:51 AM CDT	Tornado Warning Tornado observedConsiderable damage threat	SHV	24 min
Apr 12, 10:00 AM CDT	Severe Thunderstorm Warning	SHV	60 min
Apr 12, 10:04 AM CDT	Tornado Warning	SHV	19 min
Apr 12, 10:10 AM CDT	Tornado Warning Tornado observed	SHV	39 min
Apr 12, 10:13 AM CDT	Tornado Warning	SHV	47 min
Apr 12, 12:54 PM CDT	Special Weather Statement	SHV	51 min
Apr 12, 5:59 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 12, 6:14 PM CDT	Mesoscale Discussion	SPC	91 min
Apr 12, 7:18 PM CDT	Severe Thunderstorm Warning	SHV	42 min
Apr 12, 7:49 PM CDT	Severe Thunderstorm Warning	SHV	56 min
Apr 12, 7:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 12, 8:37 PM CDT	Severe Thunderstorm Warning	SHV	31 min
Apr 18, 8:27 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 18, 9:59 PM CDT	Special Weather Statement	SHV	46 min
Apr 19, 8:41 AM CDT	Tornado Watch	SPC	6 hr
Apr 19, 11:06 AM CDT	Severe Thunderstorm Warning	SHV	39 min
Apr 21, 2:58 PM CDT	Flash Flood Watch	SHV	35 hr
Apr 22, 9:11 AM CDT	River Flood Warning	SHV	49 hr
Apr 22, 11:06 AM CDT	Special Weather Statement	SHV	39 min
Apr 22, 12:57 PM CDT	Special Weather Statement	SHV	48 min
Apr 22, 5:01 PM CDT	Tornado Watch	SPC	9 hr
Apr 22, 6:04 PM CDT	Special Weather Statement	SHV	41 min
Apr 22, 6:10 PM CDT	Flash Flood Warning	SHV	3 hr
Apr 22, 6:21 PM CDT	Severe Thunderstorm Warning	SHV	39 min
Apr 22, 6:43 PM CDT	Tornado Warning	SHV	32 min
Apr 23, 9:55 AM CDT	River Flood Warning	SHV	5 days
Apr 24, 4:49 PM CDT	Tornado Watch	SPC	7 hr
Apr 24, 7:19 PM CDT	Mesoscale Discussion	SPC	101 min
Apr 24, 8:37 PM CDT	Severe Thunderstorm Warning	SHV	53 min
Apr 24, 8:43 PM CDT	Severe Thunderstorm Warning	SHV	47 min
Apr 24, 9:24 PM CDT	Severe Thunderstorm Warning	SHV	51 min
Apr 24, 9:26 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 24, 9:57 PM CDT	Severe Thunderstorm Warning	SHV	63 min
Apr 28, 8:37 AM CDT	Special Weather Statement	SHV	38 min
Apr 28, 8:25 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Apr 29, 12:11 AM CDT	Severe Thunderstorm Warning	SHV	64 min
Apr 29, 12:46 AM CDT	Severe Thunderstorm Warning	SHV	59 min
Apr 29, 3:21 PM CDT	Lake Wind Advisory	SHV	4 hr
May 8, 1:12 AM CDT	Lake Wind Advisory	SHV	18 hr
May 8, 3:06 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 8, 5:11 AM CDT	Severe Thunderstorm Warning	SHV	49 min
May 8, 5:14 AM CDT	Severe Thunderstorm Warning	SHV	46 min
May 8, 5:22 AM CDT	Mesoscale Discussion	SPC	83 min
May 8, 5:46 AM CDT	Severe Thunderstorm Warning	SHV	44 min
May 16, 9:57 AM CDT	River Flood Warning	SHV	14 days
May 16, 1:16 PM CDT	Mesoscale Discussion	SPC	2 hr
May 16, 3:27 PM CDT	Tornado Watch	SPC	6 hr
May 16, 4:16 PM CDT	Special Weather Statement	SHV	44 min
May 16, 4:37 PM CDT	Flash Flood Watch	SHV	14 hr
May 23, 7:13 AM CDT	Special Weather Statement	SHV	47 min
May 24, 12:39 PM CDT	Mesoscale Discussion	SPC	96 min
May 25, 2:45 AM CDT	Flash Flood Watch	SHV	36 hr
May 25, 3:09 PM CDT	Mesoscale Discussion	SPC	96 min
May 26, 9:47 PM CDT	Special Weather Statement	SHV	43 min
May 26, 9:57 PM CDT	Special Weather Statement	SHV	63 min
May 26, 10:57 PM CDT	Special Weather Statement	SHV	63 min
May 26, 11:15 PM CDT	Severe Thunderstorm Warning	SHV	45 min
Jun 5, 10:17 PM CDT	Special Weather Statement	SHV	58 min
Jun 5, 11:13 PM CDT	Special Weather Statement	SHV	47 min
Jun 7, 10:15 AM CDT	Lake Wind Advisory	SHV	9 hr
Jun 8, 8:02 AM CDT	Lake Wind Advisory	SHV	14 hr
Jun 9, 8:41 PM CDT	Mesoscale Discussion	SPC	94 min
Jun 9, 10:14 PM CDT	Special Weather Statement	SHV	61 min
Jun 23, 9:37 PM CDT	Special Weather Statement	SHV	38 min
Jun 23, 10:19 PM CDT	Special Weather Statement	SHV	26 min
Jun 28, 3:22 PM CDT	Special Weather Statement	SHV	38 min
Jun 30, 1:26 PM CDT	Heat Advisory	SHV	54 hr
Jul 3, 3:51 AM CDT	Heat Advisory	SHV	11 hr
Jul 3, 12:28 PM CDT	Special Weather Statement	SHV	47 min
Jul 7, 9:40 AM CDT	River Flood Warning	SHV	8 days
Jul 10, 4:47 AM CDT	Heat Advisory	SHV	5 days
Jul 11, 5:32 AM CDT	Excessive Heat Warning	SHV	4 days
Jul 14, 2:09 PM CDT	Heat Advisory	SHV	53 hr
Jul 21, 2:53 PM CDT	Special Weather Statement	SHV	52 min
Jul 21, 3:50 PM CDT	Special Weather Statement	SHV	55 min
Jul 22, 5:18 PM CDT	Special Weather Statement	SHV	42 min
Jul 30, 3:41 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 12, 2:54 PM CDT	Heat Advisory	SHV	29 hr
Aug 14, 3:02 AM CDT	Heat Advisory	SHV	64 hr
Aug 25, 10:47 AM CDT	Tropical Storm Watch	SHV	18 hr
Aug 25, 2:49 PM CDT	Flash Flood Watch	SHV	60 hr
Aug 25, 9:52 PM CDT	Hurricane Warning	SHV	39 hr
Aug 25, 9:52 PM CDT	Tropical Storm Warning	SHV	45 hr
Aug 26, 9:49 AM CDT	River Flood Warning	SHV	5 days
Aug 27, 7:43 AM CDT	Flash Flood Warning	SHV	5 hr
Aug 27, 9:57 AM CDT	River Flood Warning	SHV	21 days
Aug 27, 3:02 PM CDT	Heat Advisory	SHV	52 hr
Aug 30, 4:03 AM CDT	Heat Advisory	SHV	39 hr
Sep 1, 2:22 AM CDT	Heat Advisory	SHV	17 hr
Sep 3, 8:29 PM CDT	River Flood Warning	SHV	4 days
Sep 4, 3:34 PM CDT	Severe Thunderstorm Warning	SHV	31 min
Sep 22, 10:32 AM CDT	River Flood Warning	SHV	10 days
Sep 23, 7:33 AM CDT	Areal Flood Advisory	SHV	3 hr
Sep 26, 5:04 AM CDT	Dense Fog Advisory	SHV	5 hr
Sep 28, 1:43 AM CDT	Lake Wind Advisory	SHV	17 hr
Oct 8, 10:39 AM CDT	River Flood Warning	SHV	47 hr
Oct 9, 10:24 AM CDT	Lake Wind Advisory	SHV	29 hr
Oct 29, 3:03 AM CDT	Lake Wind Advisory	SHV	15 hr
Nov 25, 1:17 AM CST	Mesoscale Discussion	SPC	118 min
Nov 25, 2:09 AM CST	Special Weather Statement	SHV	51 min
Nov 25, 2:15 AM CST	Severe Thunderstorm Warning	SHV	44 min
Nov 30, 1:47 PM CST	Freeze Warning	SHV	19 hr
Dec 15, 8:22 PM CST	River Flood Warning	SHV	10 days
Dec 23, 3:07 AM CST	Lake Wind Advisory	SHV	38 hr
Dec 23, 3:27 PM CST	Mesoscale Discussion	SPC	2 hr
Dec 29, 9:25 AM CST	River Flood Warning	SHV	20 days
Dec 30, 3:12 AM CST	Flash Flood Watch	SHV	45 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	22
Tornado Warning	7
Severe Thunderstorm Watch	3
Tornado Watch	8
Mesoscale Discussion	23
Special Weather Statement	25
Flooding
Flash Flood Warning	5
River Flood Warning	22
Flash Flood Watch	6
Areal Flood Advisory	3
Heat
Excessive Heat Warning	1
Heat Advisory	9
Cold
Freeze Warning	1
Wind and dust
Lake Wind Advisory	14
Fog and smoke
Dense Fog Advisory	5
Tropical
Hurricane Warning	1
Tropical Storm Warning	1
Tropical Storm Watch	1

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2019 2021

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.