Weather alerts in Lewis County, Missouri, 2022

88 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Lewis County and its neighbors

Each county as a circle sized by its count in 2022. Tap one for its archive.

Alerts: 88
Warnings: 24
Watches: 15
Advisories: 27
Busiest month: June13 alerts
Busiest day: August 29, 20226 alerts

Over time

By month

Warning verification

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

Lewis County, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	11	6	45%	5	80%	13 min
Flash flood warnings	0			0

Each office's whole area, 2022

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS St. Louis, MO: tornado warnings	10	2	80%	10	50%	9 min
NWS St. Louis, MO: severe thunderstorm warnings	173	88	49%	343	81%	21 min
NWS St. Louis, MO: flash flood warnings	40	20	50%	95	91%	130 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 1, 3:10 AM CST	Wind Chill Advisory	LSX	32 hr
Jan 7, 5:52 PM CST	Winter Weather Advisory	LSX	27 hr
Jan 13, 2:10 PM CST	Winter Storm Watch	LSX	13 hr
Jan 14, 2:58 AM CST	Winter Storm Warning	LSX	33 hr
Jan 19, 3:14 AM CST	Wind Chill Advisory	LSX	32 hr
Jan 31, 2:49 AM CST	Winter Storm Watch	LSX	24 hr
Feb 1, 2:41 AM CST	Winter Storm Warning	LSX	69 hr
Feb 1, 7:20 PM CST	Mesoscale Discussion	SPC	4 hr
Feb 2, 1:13 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 15, 2:43 PM CST	Winter Storm Watch	LSX	20 hr
Feb 16, 10:50 AM CST	Winter Storm Warning	LSX	33 hr
Feb 17, 6:00 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 22, 2:21 PM CST	Winter Weather Advisory	LSX	58 hr
Mar 5, 6:10 PM CST	Tornado Watch	SPC	4 hr
Mar 5, 6:33 PM CST	Mesoscale Discussion	SPC	87 min
Mar 5, 7:51 PM CST	Mesoscale Discussion	SPC	114 min
Mar 9, 2:21 PM CST	Winter Weather Advisory	LSX	52 hr
Mar 23, 9:53 PM CDT	River Flood Warning	LSX	15 hr
Apr 5, 7:20 PM CDT	Severe Thunderstorm Warning	LSX	40 min
Apr 5, 7:53 PM CDT	Severe Thunderstorm Warning	LSX	35 min
Apr 8, 3:35 AM CDT	Freeze Warning	LSX	28 hr
Apr 14, 3:43 AM CDT	Wind Advisory	LSX	15 hr
Apr 17, 2:27 PM CDT	Freeze Watch	LSX	13 hr
Apr 18, 3:12 AM CDT	Freeze Warning	LSX	30 hr
Apr 23, 9:23 AM CDT	Wind Advisory	LSX	10 hr
Apr 25, 2:40 AM CDT	Freeze Warning	LSX	29 hr
May 17, 6:12 PM CDT	Mesoscale Discussion	SPC	93 min
May 20, 7:10 PM CDT	Mesoscale Discussion	SPC	2 hr
May 31, 3:40 PM CDT	Mesoscale Discussion	SPC	2 hr
May 31, 6:22 PM CDT	Mesoscale Discussion	SPC	83 min
Jun 6, 3:45 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 12, 2:52 PM CDT	Heat Advisory	LSX	5 days
Jun 15, 6:21 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 15, 7:53 PM CDT	Mesoscale Discussion	SPC	97 min
Jun 17, 1:42 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 17, 2:40 AM CDT	Severe Thunderstorm Warning	LSX	50 min
Jun 17, 3:11 AM CDT	Severe Thunderstorm Warning	LSX	34 min
Jun 17, 3:29 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 20, 2:23 PM CDT	Heat Advisory	LSX	30 hr
Jun 25, 2:17 PM CDT	Mesoscale Discussion	SPC	118 min
Jun 25, 5:02 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 25, 7:16 PM CDT	Mesoscale Discussion	SPC	89 min
Jun 25, 9:27 PM CDT	Mesoscale Discussion	SPC	93 min
Jul 3, 1:08 PM CDT	Heat Advisory	LSX	72 hr
Jul 7, 8:08 AM CDT	Areal Flood Advisory	LSX	4 hr
Jul 7, 2:53 PM CDT	Flood Watch	LSX	14 hr
Jul 8, 2:16 AM CDT	Areal Flood Advisory	LSX	3 hr
Jul 8, 2:38 AM CDT	Areal Flood Advisory	LSX	3 hr
Jul 8, 1:19 PM CDT	River Flood Warning	LSX	7 hr
Jul 17, 7:11 AM CDT	Areal Flood Advisory	LSX	3 hr
Jul 21, 2:02 PM CDT	Heat Advisory	LSX	3 days
Jul 25, 2:59 AM CDT	Flood Watch	LSX	30 hr
Aug 1, 3:24 AM CDT	Heat Advisory	LSX	64 hr
Aug 5, 2:51 AM CDT	Heat Advisory	LSX	4 days
Aug 29, 4:23 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 29, 6:13 PM CDT	Severe Thunderstorm Warning	LSX	47 min
Aug 29, 6:22 PM CDT	Severe Thunderstorm Warning	LSX	38 min
Aug 29, 6:41 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 29, 6:43 PM CDT	Areal Flood Advisory	LSX	3 hr
Aug 29, 6:57 PM CDT	Severe Thunderstorm Warning	LSX	48 min
Sep 3, 3:28 AM CDT	Dense Fog Advisory	LSX	5 hr
Sep 6, 2:47 AM CDT	Dense Fog Advisory	LSX	6 hr
Sep 18, 3:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 18, 6:11 PM CDT	Tornado Watch	SPC	6 hr
Sep 18, 8:41 PM CDT	Mesoscale Discussion	SPC	3 hr
Sep 18, 9:30 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LSX	45 min
Sep 18, 10:01 PM CDT	Severe Thunderstorm Warning	LSX	32 min
Sep 18, 10:15 PM CDT	Severe Thunderstorm Warning	LSX	19 min
Sep 18, 10:55 PM CDT	Severe Thunderstorm Warning	LSX	50 min
Sep 18, 11:28 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 24, 3:02 AM CDT	Dense Fog Advisory	LSX	6 hr
Sep 27, 1:39 PM CDT	Frost Advisory	LSX	18 hr
Oct 6, 2:58 PM CDT	Freeze Watch	LSX	12 hr
Oct 7, 2:42 AM CDT	Freeze Warning	LSX	30 hr
Oct 12, 2:35 PM CDT	Red Flag Warning	LSX	29 hr
Oct 14, 2:19 PM CDT	Frost Advisory	LSX	18 hr
Oct 16, 2:44 AM CDT	Freeze Watch	LSX	12 hr
Oct 16, 2:23 PM CDT	Freeze Warning	LSX	43 hr
Nov 3, 2:08 PM CDT	Wind Advisory	LSX	45 hr
Nov 10, 11:47 AM CST	Mesoscale Discussion	SPC	88 min
Nov 14, 3:03 AM CST	Winter Weather Advisory	LSX	30 hr
Dec 1, 1:50 PM CST	Wind Advisory	LSX	37 hr
Dec 19, 3:48 PM CST	Winter Storm Watch	LSX	36 hr
Dec 20, 2:54 AM CST	Wind Chill Watch	LSX	25 hr
Dec 21, 3:30 AM CST	Wind Chill Warning	LSX	71 hr
Dec 21, 3:30 AM CST	Winter Storm Warning	LSX	41 hr
Dec 22, 6:27 AM CST	Mesoscale Discussion	SPC	5 hr
Dec 22, 2:55 PM CST	Wind Chill Advisory	LSX	42 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	11
Severe Thunderstorm Watch	3
Tornado Watch	2
Mesoscale Discussion	22
Flooding
River Flood Warning	2
Flood Watch	2
Areal Flood Advisory	5
Winter
Winter Storm Warning	4
Winter Storm Watch	4
Winter Weather Advisory	4
Heat
Heat Advisory	6
Cold
Freeze Warning	5
Wind Chill Warning	1
Freeze Watch	3
Wind Chill Watch	1
Frost Advisory	2
Wind Chill Advisory	3
Wind and dust
Wind Advisory	4
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	3

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2021 2023

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.