Alert archive / Missouri / Saint Charles County

Weather alerts in Saint Charles County, Missouri, 2014

153 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Saint Charles County and its neighbors

Each county as a circle sized by its count in 2014. Tap one for its archive.

Alerts: 153
Warnings: 59
Watches: 23
Advisories: 29
Busiest month: April32 alerts
Busiest day: April 28, 20148 alerts

Over time

By month

Warning verification

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

2 of 3 tornado warnings covering Saint Charles County in 2014 had a tornado report inside them; 5 of 6 tornado reports fell inside a warning, on average 15 minutes after it went out.

Saint Charles County, 2014

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	2	33%	6	83%	15 min
Severe thunderstorm warnings	31	20	35%	19	58%	19 min
Flash flood warnings	3	2	33%	4	100%	58 min

Each office's whole area, 2014

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS St. Louis, MO: tornado warnings	36	7	81%	22	64%	10 min
NWS St. Louis, MO: severe thunderstorm warnings	239	119	50%	368	76%	21 min
NWS St. Louis, MO: flash flood warnings	28	13	54%	30	87%	144 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, 3:32 AM CST	Winter Weather Advisory	LSX	28 hr
Jan 3, 11:48 AM CST	Winter Storm Watch	LSX	16 hr
Jan 4, 3:31 AM CST	Winter Storm Warning	LSX	44 hr
Jan 4, 4:13 PM CST	Wind Chill Warning	LSX	68 hr
Jan 5, 3:16 AM CST	Mesoscale Discussion	SPC	6 hr
Jan 5, 9:42 AM CST	Mesoscale Discussion	SPC	5 hr
Jan 6, 12:19 PM CST	Wind Chill Advisory	LSX	22 hr
Jan 8, 3:50 PM CST	Winter Weather Advisory	LSX	20 hr
Jan 20, 3:33 PM CST	Wind Advisory	LSX	14 hr
Jan 22, 3:03 AM CST	Wind Chill Advisory	LSX	33 hr
Jan 23, 3:59 PM CST	Red Flag Warning	LSX	27 hr
Jan 26, 3:56 AM CST	Wind Advisory	LSX	23 hr
Jan 30, 4:01 AM CST	Red Flag Warning	LSX	13 hr
Jan 30, 4:00 PM CST	Winter Weather Advisory	LSX	60 hr
Feb 3, 1:56 PM CST	Winter Weather Advisory	LSX	46 hr
Feb 4, 11:38 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 5, 4:20 AM CST	Wind Chill Advisory	LSX	32 hr
Feb 16, 4:10 AM CST	Freezing Rain Advisory	LSX	32 hr
Feb 17, 2:26 AM CST	Mesoscale Discussion	SPC	4 hr
Feb 20, 2:43 AM CST	Mesoscale Discussion	SPC	3 hr
Feb 20, 4:22 AM CST	Wind Advisory	LSX	20 hr
Feb 20, 11:34 AM CST	Mesoscale Discussion	SPC	116 min
Feb 20, 1:36 PM CST	Severe Thunderstorm Watch	SPC	4 hr
Feb 20, 3:23 PM CST	Mesoscale Discussion	SPC	97 min
Feb 28, 3:56 AM CST	Winter Storm Watch	LSX	24 hr
Mar 1, 3:38 AM CST	Winter Storm Warning	LSX	50 hr
Mar 2, 5:32 AM CST	Mesoscale Discussion	SPC	6 hr
Mar 2, 6:32 AM CST	Winter Weather Advisory	LSX	21 hr
Mar 11, 3:52 PM CDT	Wind Advisory	LSX	16 hr
Mar 21, 4:37 AM CDT	Red Flag Warning	LSX	13 hr
Apr 2, 9:17 AM CDT	Mesoscale Discussion	SPC	88 min
Apr 2, 10:51 AM CDT	Areal Flood Advisory	LSX	26 days
Apr 2, 12:13 PM CDT	Areal Flood Advisory	LSX	3 hr
Apr 2, 12:55 PM CDT	Severe Thunderstorm Warning	LSX	50 min
Apr 2, 2:12 PM CDT	Flash Flood Warning	LSX	4 hr
Apr 2, 3:07 PM CDT	Flash Flood Watch	LSX	37 hr
Apr 2, 3:18 PM CDT	River Flood Warning	LSX	57 hr
Apr 3, 2:49 AM CDT	Mesoscale Discussion	SPC	116 min
Apr 3, 1:32 PM CDT	Severe Thunderstorm Warning	LSX	43 min
Apr 3, 4:58 PM CDT	Tornado Watch	SPC	7 hr
Apr 3, 6:31 PM CDT	Severe Thunderstorm Warning	LSX	44 min
Apr 3, 7:00 PM CDT	Severe Thunderstorm Warning	LSX	45 min
Apr 3, 7:13 PM CDT	Tornado Warning Tornado observed	LSX	32 min
Apr 3, 7:22 PM CDT	Severe Thunderstorm Warning	LSX	53 min
Apr 3, 7:26 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 3, 8:04 PM CDT	Severe Thunderstorm Warning	LSX	41 min
Apr 13, 7:41 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 13, 9:12 PM CDT	Mesoscale Discussion	SPC	63 min
Apr 14, 4:06 AM CDT	Freeze Warning	LSX	29 hr
Apr 16, 4:14 AM CDT	Red Flag Warning	LSX	15 hr
Apr 24, 2:21 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 24, 5:18 PM CDT	Severe Thunderstorm Warning	LSX	42 min
Apr 27, 1:59 PM CDT	Mesoscale Discussion	SPC	61 min
Apr 27, 2:13 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 28, 1:43 AM CDT	Mesoscale Discussion	SPC	92 min
Apr 28, 12:54 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 28, 1:11 PM CDT	Tornado Watch	SPC	7 hr
Apr 28, 2:43 PM CDT	Severe Thunderstorm Warning	LSX	47 min
Apr 28, 3:06 PM CDT	Severe Thunderstorm Warning	LSX	39 min
Apr 28, 3:19 PM CDT	Severe Thunderstorm Warning	LSX	41 min
Apr 28, 3:38 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 28, 3:56 PM CDT	Severe Thunderstorm Warning	LSX	49 min
May 9, 11:46 AM CDT	Mesoscale Discussion	SPC	59 min
May 9, 12:50 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 10, 4:56 PM CDT	Mesoscale Discussion	SPC	64 min
May 10, 5:16 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
May 10, 7:55 PM CDT	Mesoscale Discussion	SPC	95 min
May 10, 10:22 PM CDT	Mesoscale Discussion	SPC	83 min
May 11, 12:32 AM CDT	Severe Thunderstorm Warning	LSX	43 min
May 11, 1:17 AM CDT	Severe Thunderstorm Warning	LSX	43 min
May 11, 1:19 AM CDT	Severe Thunderstorm Warning	LSX	41 min
May 12, 9:48 PM CDT	River Flood Warning	LSX	16 days
May 21, 3:12 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 3, 12:41 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 4, 5:00 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 4, 6:21 AM CDT	Severe Thunderstorm Warning	LSX	39 min
Jun 7, 2:27 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 7, 3:42 PM CDT	Tornado Warning	LSX	33 min
Jun 7, 4:17 PM CDT	Tornado Warning	LSX	28 min
Jun 10, 12:45 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 3:07 PM CDT	Areal Flood Advisory	LSX	3 hr
Jun 10, 3:07 PM CDT	Severe Thunderstorm Warning	LSX	53 min
Jun 10, 3:32 PM CDT	Flash Flood Warning	LSX	6 hr
Jun 10, 4:26 PM CDT	Areal Flood Advisory	LSX	3 hr
Jun 10, 7:34 PM CDT	Areal Flood Advisory	LSX	4 hr
Jun 10, 9:07 PM CDT	River Flood Warning	LSX	52 hr
Jun 10, 9:37 PM CDT	Areal Flood Warning	LSX	12 hr
Jun 21, 6:04 PM CDT	Severe Thunderstorm Warning	LSX	41 min
Jun 21, 6:16 PM CDT	Mesoscale Discussion	SPC	89 min
Jun 21, 6:44 PM CDT	Severe Thunderstorm Warning	LSX	46 min
Jun 21, 6:57 PM CDT	Severe Thunderstorm Warning	LSX	33 min
Jun 21, 7:28 PM CDT	Areal Flood Advisory	LSX	4 hr
Jun 22, 2:31 PM CDT	Severe Thunderstorm Warning	LSX	32 min
Jun 22, 3:22 PM CDT	Severe Thunderstorm Warning	LSX	23 min
Jun 22, 3:26 PM CDT	Flash Flood Warning	LSX	4 hr
Jun 22, 9:57 PM CDT	River Flood Warning	LSX	31 days
Jun 23, 3:40 PM CDT	Flash Flood Watch	LSX	16 hr
Jun 24, 12:26 AM CDT	Areal Flood Advisory	LSX	6 hr
Jun 27, 3:17 PM CDT	Areal Flood Advisory	LSX	3 hr
Jun 29, 4:06 PM CDT	Heat Advisory	LSX	28 hr
Jun 30, 12:55 PM CDT	River Flood Warning	LSX	18 days
Jul 7, 1:12 PM CDT	Severe Thunderstorm Warning	LSX	38 min
Jul 7, 1:45 PM CDT	Mesoscale Discussion	SPC	90 min
Jul 7, 6:01 PM CDT	Mesoscale Discussion	SPC	59 min
Jul 7, 8:52 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 7, 11:33 PM CDT	Mesoscale Discussion	SPC	87 min
Jul 8, 12:03 AM CDT	Severe Thunderstorm Warning	LSX	57 min
Jul 8, 12:36 AM CDT	Severe Thunderstorm Warning	LSX	54 min
Jul 8, 12:49 AM CDT	Mesoscale Discussion	SPC	86 min
Jul 14, 10:56 AM CDT	Mesoscale Discussion	SPC	94 min
Jul 14, 11:42 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 14, 1:49 PM CDT	Severe Thunderstorm Warning	LSX	41 min
Jul 25, 3:53 PM CDT	Heat Advisory	LSX	26 hr
Aug 6, 6:02 PM CDT	Severe Thunderstorm Warning	LSX	28 min
Aug 19, 3:30 PM CDT	Excessive Heat Warning	LSX	8 days
Aug 20, 3:10 AM CDT	Heat Advisory	LSX	8 days
Aug 20, 7:31 PM CDT	Severe Thunderstorm Warning	LSX	44 min
Aug 27, 1:09 PM CDT	Mesoscale Discussion	SPC	3 hr
Sep 1, 3:24 PM CDT	Flash Flood Watch	LSX	14 hr
Sep 1, 5:57 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 1, 8:44 PM CDT	Severe Thunderstorm Warning	LSX	46 min
Sep 1, 9:26 PM CDT	Severe Thunderstorm Warning	LSX	49 min
Sep 1, 10:52 PM CDT	Areal Flood Advisory	LSX	4 hr
Sep 2, 1:23 AM CDT	River Flood Warning	LSX	7 days
Sep 2, 7:43 AM CDT	Areal Flood Warning	LSX	8 hr
Sep 3, 4:14 AM CDT	Heat Advisory	LSX	39 hr
Sep 5, 2:38 PM CDT	Mesoscale Discussion	SPC	67 min
Sep 5, 3:43 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 5, 5:11 PM CDT	Mesoscale Discussion	SPC	94 min
Sep 9, 1:25 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 9, 5:02 PM CDT	Mesoscale Discussion	SPC	88 min
Sep 9, 11:10 PM CDT	River Flood Warning	LSX	37 hr
Sep 10, 12:25 PM CDT	River Flood Warning	LSX	8 days
Sep 10, 1:48 PM CDT	Mesoscale Discussion	SPC	117 min
Sep 10, 3:24 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 15, 9:31 AM CDT	Mesoscale Discussion	SPC	119 min
Oct 1, 1:44 PM CDT	Mesoscale Discussion	SPC	3 hr
Oct 1, 2:53 PM CDT	Flash Flood Watch	LSX	37 hr
Oct 1, 6:20 PM CDT	Mesoscale Discussion	SPC	85 min
Oct 2, 2:10 AM CDT	Severe Thunderstorm Warning	LSX	27 min
Oct 2, 2:33 AM CDT	Mesoscale Discussion	SPC	117 min
Oct 2, 10:07 AM CDT	River Flood Warning	LSX	53 hr
Oct 2, 11:59 AM CDT	Mesoscale Discussion	SPC	91 min
Oct 2, 1:22 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
Oct 7, 3:52 AM CDT	Severe Thunderstorm Warning	LSX	23 min
Oct 9, 3:08 AM CDT	Flash Flood Watch	LSX	35 hr
Oct 13, 10:29 AM CDT	Tornado Watch	SPC	8 hr
Oct 13, 4:11 PM CDT	River Flood Warning	LSX	27 hr
Oct 29, 3:24 PM CDT	Freeze Watch	LSX	24 hr
Oct 30, 3:30 PM CDT	Freeze Warning	LSX	42 hr
Nov 16, 4:00 AM CST	Winter Weather Advisory	LSX	17 hr
Nov 30, 11:56 PM CST	Winter Weather Advisory	LSX	12 hr
Dec 23, 3:09 PM CST	Winter Weather Advisory	LSX	17 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	31
Tornado Warning	3
Severe Thunderstorm Watch	12
Tornado Watch	3
Mesoscale Discussion	42
Flooding
Areal Flood Warning	2
Flash Flood Warning	3
River Flood Warning	10
Flash Flood Watch	5
Areal Flood Advisory	9
Winter
Winter Storm Warning	2
Winter Storm Watch	2
Freezing Rain Advisory	1
Winter Weather Advisory	8
Heat
Excessive Heat Warning	1
Heat Advisory	4
Cold
Freeze Warning	2
Wind Chill Warning	1
Freeze Watch	1
Wind Chill Advisory	3
Wind and dust
Wind Advisory	4
Fire
Red Flag Warning	4

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2013 2015

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.