Weather alerts in Lewis County, Missouri, 2008

177 weather alerts in 2008, 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 2008. Tap one for its archive.

Alerts: 177
Warnings: 60
Watches: 43
Advisories: 34
Busiest month: June43 alerts
Busiest day: June 3, 200818 alerts

Over time

By month

Warning verification

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

1 of 6 tornado warnings covering Lewis County in 2008 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 17 minutes after it went out.

Lewis County, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	6	1	83%	2	100%	17 min
Severe thunderstorm warnings	22	11	50%	10	60%	24 min
Flash flood warnings	6	3	50%	2	50%	75 min

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS St. Louis, MO: tornado warnings	98	15	85%	34	65%	23 min
NWS St. Louis, MO: severe thunderstorm warnings	467	151	68%	450	74%	23 min
NWS St. Louis, MO: flash flood warnings	100	35	65%	145	77%	155 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 7, 1:47 PM CST	Mesoscale Discussion	SPC	58 min
Jan 7, 1:52 PM CST	Tornado Watch	SPC	146 days
Jan 7, 2:04 PM CST	Severe Thunderstorm Warning	LSX	26 min
Jan 7, 2:39 PM CST	Severe Thunderstorm Warning	LSX	36 min
Jan 7, 4:34 PM CST	Mesoscale Discussion	SPC	86 min
Jan 7, 6:11 PM CST	Mesoscale Discussion	SPC	94 min
Jan 18, 3:56 PM CST	Wind Chill Advisory	LSX	19 hr
Jan 21, 4:12 PM CST	Winter Weather Advisory	LSX	12 hr
Jan 23, 3:23 PM CST	Wind Chill Advisory	LSX	19 hr
Jan 27, 2:59 PM CST	Wind Advisory	LSX	29 hr
Jan 28, 8:10 PM CST	Wind Advisory	LSX	25 hr
Feb 3, 3:31 AM CST	Freezing Fog Advisory	LSX	7 hr
Feb 3, 12:10 PM CST	Mesoscale Discussion	SPC	4 hr
Feb 3, 8:50 PM CST	Dense Fog Advisory	LSX	15 hr
Feb 4, 12:15 PM CST	Dense Fog Advisory	LSX	105 min
Feb 4, 3:32 PM CST	Winter Storm Watch	LSX	13 hr
Feb 5, 4:20 AM CST	Winter Weather Advisory	LSX	35 hr
Feb 6, 6:07 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 9, 4:13 AM CST	Wind Chill Advisory	LSX	30 hr
Feb 15, 3:10 PM CST	Flash Flood Watch	LSX	45 hr
Feb 16, 8:17 AM CST	River Flood Warning	LSX	3 days
Feb 19, 3:48 PM CST	Wind Chill Advisory	LSX	19 hr
Feb 21, 4:00 AM CST	Winter Weather Advisory	LSX	24 hr
Feb 25, 3:21 PM CST	Snow and Blowing Snow Advisory	LSX	13 hr
Mar 2, 4:06 AM CST	Flood Watch	LSX	35 hr
Mar 14, 3:48 AM CDT	Dense Fog Advisory	LSX	7 hr
Mar 16, 3:10 PM CDT	Flood Watch	LSX	64 hr
Mar 31, 7:06 AM CDT	Severe Thunderstorm Warning	LSX	24 min
Mar 31, 1:09 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 7, 3:03 PM CDT	Flash Flood Watch	LSX	24 hr
Apr 9, 4:15 AM CDT	Flash Flood Watch	LSX	41 hr
Apr 9, 11:40 AM CDT	River Flood Warning	LSX	3 days
Apr 9, 3:01 PM CDT	River Flood Warning	LSX	43 days
Apr 9, 9:15 PM CDT	River Flood Warning	LSX	71 hr
Apr 10, 4:55 PM CDT	Tornado Watch	SPC	5 hr
Apr 10, 5:15 PM CDT	Severe Thunderstorm Warning	LSX	60 min
Apr 10, 5:40 PM CDT	Tornado Warning	LSX	32 min
Apr 10, 6:44 PM CDT	Mesoscale Discussion	SPC	61 min
Apr 16, 3:59 AM CDT	Wind Advisory	LSX	11 hr
Apr 22, 6:49 AM CDT	Severe Thunderstorm Warning	LSX	40 min
Apr 24, 3:08 AM CDT	Flood Watch	LSX	7 hr
Apr 25, 4:22 AM CDT	Mesoscale Discussion	SPC	23 min
Apr 25, 4:51 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 25, 12:21 PM CDT	Mesoscale Discussion	SPC	54 min
Apr 25, 1:27 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 28, 3:16 AM CDT	Freeze Warning	LSX	29 hr
May 1, 11:29 PM CDT	Mesoscale Discussion	SPC	91 min
May 2, 5:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 3, 4:03 PM CDT	Frost Advisory	LSX	16 hr
May 10, 12:34 PM CDT	Mesoscale Discussion	SPC	116 min
May 10, 3:30 PM CDT	Wind Advisory	LSX	28 hr
May 13, 10:38 PM CDT	Mesoscale Discussion	SPC	97 min
May 25, 6:58 AM CDT	Severe Thunderstorm Warning	LSX	47 min
May 25, 3:57 PM CDT	Flash Flood Watch	LSX	71 hr
May 25, 3:58 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 25, 6:39 PM CDT	Mesoscale Discussion	SPC	66 min
May 30, 7:56 AM CDT	Tornado Watch	SPC	6 hr
May 30, 1:56 PM CDT	Tornado Watch	SPC	8 hr
May 30, 4:14 PM CDT	Severe Thunderstorm Warning	LSX	61 min
May 30, 5:07 PM CDT	Severe Thunderstorm Warning	LSX	38 min
May 30, 5:18 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 2, 8:02 PM CDT	Mesoscale Discussion	SPC	118 min
Jun 2, 9:15 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 2, 9:34 PM CDT	River Flood Warning	LSX	38 days
Jun 3, 12:45 AM CDT	Severe Thunderstorm Warning	LSX	45 min
Jun 3, 1:28 AM CDT	Severe Thunderstorm Warning	LSX	47 min
Jun 3, 1:39 AM CDT	Areal Flood Advisory	LSX	45 min
Jun 3, 1:58 AM CDT	Tornado Warning	LSX	32 min
Jun 3, 2:03 AM CDT	Flash Flood Warning	LSX	11 hr
Jun 3, 2:07 AM CDT	River Flood Warning	LSX	4 days
Jun 3, 3:08 AM CDT	Mesoscale Discussion	SPC	97 min
Jun 3, 3:23 AM CDT	River Flood Warning	LSX	3 days
Jun 3, 3:31 AM CDT	Tornado Watch	SPC	10 hr
Jun 3, 7:17 AM CDT	Mesoscale Discussion	SPC	118 min
Jun 3, 8:46 AM CDT	Severe Thunderstorm Warning	LSX	59 min
Jun 3, 8:59 AM CDT	Severe Thunderstorm Warning	LSX	47 min
Jun 3, 3:35 PM CDT	Flash Flood Watch	LSX	24 hr
Jun 3, 3:40 PM CDT	Tornado Watch	SPC	7 hr
Jun 3, 5:38 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 3, 8:00 PM CDT	Severe Thunderstorm Warning	LSX	35 min
Jun 3, 8:58 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 3, 10:58 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 5, 9:43 PM CDT	Tornado Watch	SPC	7 hr
Jun 6, 2:52 AM CDT	Severe Thunderstorm Warning	LSX	38 min
Jun 8, 3:50 AM CDT	Flash Flood Watch	LSX	41 hr
Jun 8, 5:26 PM CDT	Mesoscale Discussion	SPC	34 min
Jun 8, 5:36 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 8, 9:24 PM CDT	Areal Flood Advisory	LSX	6 hr
Jun 8, 10:01 PM CDT	Mesoscale Discussion	SPC	59 min
Jun 12, 11:23 AM CDT	River Flood Warning	LSX	25 hr
Jun 12, 12:37 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 12, 3:06 PM CDT	Tornado Watch	SPC	7 hr
Jun 12, 3:37 PM CDT	Flash Flood Watch	LSX	24 hr
Jun 12, 8:18 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 12, 10:11 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 12, 11:15 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 15, 11:17 AM CDT	Mesoscale Discussion	SPC	88 min
Jun 15, 11:42 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 24, 8:17 PM CDT	Severe Thunderstorm Warning	LSX	43 min
Jun 24, 10:21 PM CDT	Mesoscale Discussion	SPC	54 min
Jun 25, 2:35 AM CDT	Flash Flood Warning	LSX	12 hr
Jun 25, 11:53 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 26, 12:38 AM CDT	Severe Thunderstorm Warning	LSX	67 min
Jun 27, 8:13 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 8, 1:27 PM CDT	Mesoscale Discussion	SPC	93 min
Jul 8, 1:54 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 20, 10:17 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 21, 1:48 PM CDT	Mesoscale Discussion	SPC	87 min
Jul 21, 5:10 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 21, 7:16 PM CDT	Mesoscale Discussion	SPC	89 min
Jul 21, 7:23 PM CDT	Severe Thunderstorm Warning	LSX	52 min
Jul 21, 8:01 PM CDT	Tornado Warning	LSX	44 min
Jul 21, 8:46 PM CDT	Severe Thunderstorm Warning	LSX	44 min
Jul 21, 9:00 PM CDT	Flash Flood Warning	LSX	6 hr
Jul 24, 4:12 PM CDT	Flash Flood Watch	LSX	24 hr
Jul 24, 10:23 PM CDT	Flash Flood Warning	LSX	12 hr
Jul 24, 11:32 PM CDT	Mesoscale Discussion	SPC	88 min
Jul 25, 10:23 AM CDT	Areal Flood Warning	LSX	8 hr
Jul 25, 6:10 PM CDT	Areal Flood Warning	LSX	12 hr
Jul 26, 6:05 AM CDT	Areal Flood Warning	LSX	8 hr
Jul 26, 2:01 PM CDT	Areal Flood Warning	LSX	6 hr
Jul 27, 3:45 PM CDT	Flash Flood Watch	LSX	18 hr
Jul 27, 4:47 PM CDT	Mesoscale Discussion	SPC	88 min
Jul 27, 5:27 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 27, 7:02 PM CDT	Severe Thunderstorm Warning	LSX	58 min
Jul 27, 8:00 PM CDT	Severe Thunderstorm Warning	LSX	45 min
Jul 27, 8:33 PM CDT	Flash Flood Warning	LSX	6 hr
Jul 28, 1:23 AM CDT	Mesoscale Discussion	SPC	97 min
Jul 28, 11:02 AM CDT	River Flood Warning	LSX	72 hr
Jul 29, 3:11 PM CDT	Mesoscale Discussion	SPC	94 min
Jul 29, 4:19 PM CDT	Flash Flood Watch	LSX	19 hr
Jul 29, 8:56 PM CDT	River Flood Warning	LSX	71 hr
Jul 31, 12:06 AM CDT	Dense Fog Advisory	LSX	9 hr
Aug 3, 4:07 AM CDT	Heat Advisory	LSX	63 hr
Aug 13, 3:22 AM CDT	Dense Fog Advisory	LSX	5 hr
Aug 28, 2:48 PM CDT	Mesoscale Discussion	SPC	87 min
Aug 28, 3:22 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 28, 6:11 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 28, 6:40 PM CDT	Severe Thunderstorm Warning	LSX	50 min
Aug 28, 7:07 PM CDT	Severe Thunderstorm Warning	LSX	53 min
Sep 2, 3:57 PM CDT	Flash Flood Watch	LSX	46 hr
Sep 3, 11:04 AM CDT	Areal Flood Advisory	LSX	18 days
Sep 6, 5:47 AM CDT	Dense Fog Advisory	LSX	3 hr
Sep 9, 4:00 AM CDT	Dense Fog Advisory	LSX	5 hr
Sep 12, 12:07 PM CDT	Flash Flood Watch	LSX	47 hr
Sep 13, 11:13 AM CDT	River Flood Warning	LSX	5 days
Sep 13, 11:13 AM CDT	River Flood Warning	LSX	4 days
Sep 13, 4:35 PM CDT	Areal Flood Warning	LSX	18 hr
Sep 14, 10:20 AM CDT	Areal Flood Warning	LSX	12 hr
Sep 14, 11:40 AM CDT	River Flood Warning	LSX	24 hr
Sep 14, 9:37 PM CDT	Areal Flood Warning	LSX	12 hr
Oct 25, 3:50 PM CDT	Freeze Watch	LSX	12 hr
Oct 25, 3:50 PM CDT	Wind Advisory	LSX	29 hr
Oct 26, 3:36 AM CDT	Freeze Warning	LSX	24 hr
Oct 27, 3:16 AM CDT	Freeze Warning	LSX	30 hr
Nov 1, 10:05 PM CDT	Dense Fog Advisory	LSX	12 hr
Nov 29, 3:39 PM CST	Winter Weather Advisory	LSX	33 hr
Dec 14, 3:36 PM CST	Winter Weather Advisory	LSX	20 hr
Dec 14, 5:47 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 15, 4:07 PM CST	Winter Weather Advisory	LSX	28 hr
Dec 17, 4:09 PM CST	Freezing Rain Advisory	LSX	32 hr
Dec 18, 4:34 AM CST	Ice Storm Warning	LSX	24 hr
Dec 18, 6:46 PM CST	Mesoscale Discussion	SPC	6 hr
Dec 19, 12:45 AM CST	Mesoscale Discussion	SPC	4 hr
Dec 19, 3:41 PM CST	Wind Chill Advisory	LSX	65 hr
Dec 22, 3:57 PM CST	Winter Weather Advisory	LSX	43 hr
Dec 25, 3:56 PM CST	Flash Flood Watch	LSX	50 hr
Dec 26, 1:02 PM CST	River Flood Warning	LSX	4 days
Dec 26, 11:04 PM CST	River Flood Warning	LSX	66 hr
Dec 26, 11:15 PM CST	Mesoscale Discussion	SPC	90 min
Dec 27, 12:44 AM CST	Tornado Warning	LSX	46 min
Dec 27, 1:23 AM CST	Tornado Warning	LSX	47 min
Dec 27, 1:35 AM CST	Tornado Watch	SPC	7 hr
Dec 27, 2:37 AM CST	Flash Flood Warning	LSX	6 hr
Dec 27, 4:30 AM CST	Tornado Watch	SPC	8 hr
Dec 27, 9:14 AM CST	Tornado Warning	LSX	31 min
Dec 30, 3:32 PM CST	Wind Advisory	LSX	11 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	6
Severe Thunderstorm Watch	15
Tornado Watch	10
Mesoscale Discussion	40
Flooding
Areal Flood Warning	7
Flash Flood Warning	6
River Flood Warning	15
Flash Flood Watch	13
Flood Watch	3
Areal Flood Advisory	3
Winter
Ice Storm Warning	1
Winter Storm Watch	1
Freezing Rain Advisory	1
Snow and Blowing Snow Advisory	1
Winter Weather Advisory	7
Heat
Heat Advisory	1
Cold
Freeze Warning	3
Freeze Watch	1
Frost Advisory	1
Wind Chill Advisory	5
Wind and dust
Wind Advisory	6
Fog and smoke
Dense Fog Advisory	8
Freezing Fog Advisory	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 2007 2009

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.