Alert archive / Missouri / Mercer County

Weather alerts in Mercer County, Missouri, 2020

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

Mercer County and its neighbors

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

Alerts: 99
Warnings: 17
Watches: 11
Advisories: 37
Busiest month: May24 alerts
Busiest day: May 24, 20206 alerts

Over time

By month

Warning verification

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

Mercer County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	8	3	63%	1	100%	17 min
Flash flood warnings	1	1	0%	0

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Kansas City, MO: tornado warnings	7	2	71%	9	33%	17 min
NWS Kansas City, MO: severe thunderstorm warnings	182	82	55%	192	91%	21 min
NWS Kansas City, MO: flash flood warnings	27	13	52%	23	83%	154 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, 6:04 AM CST	Wind Advisory	EAX	9 hr
Jan 9, 3:27 PM CST	Winter Storm Watch	EAX	12 hr
Jan 10, 3:29 AM CST	Winter Storm Warning	EAX	38 hr
Jan 10, 12:54 PM CST	Mesoscale Discussion	SPC	6 hr
Jan 13, 8:13 PM CST	Dense Fog Advisory	EAX	13 hr
Jan 15, 2:51 PM CST	Winter Storm Watch	EAX	13 hr
Jan 16, 3:51 AM CST	Winter Weather Advisory	EAX	50 hr
Jan 17, 9:45 AM CST	Mesoscale Discussion	SPC	6 hr
Jan 17, 4:07 PM CST	Mesoscale Discussion	SPC	5 hr
Jan 18, 4:23 AM CST	Wind Advisory	EAX	9 hr
Jan 18, 1:41 PM CST	Wind Chill Advisory	EAX	21 hr
Jan 19, 2:24 PM CST	Wind Chill Advisory	EAX	19 hr
Jan 21, 3:54 PM CST	Winter Weather Advisory	EAX	32 hr
Jan 23, 3:19 AM CST	Winter Weather Advisory	EAX	36 hr
Jan 26, 3:08 AM CST	Dense Fog Advisory	EAX	7 hr
Jan 26, 2:36 PM CST	Dense Fog Advisory	EAX	19 hr
Feb 11, 3:15 PM CST	Winter Weather Advisory	EAX	33 hr
Feb 12, 3:27 AM CST	Wind Chill Advisory	EAX	32 hr
Mar 4, 2:16 PM CST	Fire Weather Watch	EAX	12 hr
Mar 5, 2:17 AM CST	Red Flag Warning	EAX	16 hr
Mar 7, 2:40 AM CST	Red Flag Warning	EAX	15 hr
Mar 13, 3:14 PM CDT	Winter Weather Advisory	EAX	25 hr
Mar 19, 2:41 PM CDT	Mesoscale Discussion	SPC	3 hr
Mar 19, 3:29 PM CDT	Tornado Watch	SPC	8 hr
Mar 19, 5:43 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 19, 8:40 PM CDT	Mesoscale Discussion	SPC	95 min
Mar 23, 3:10 AM CDT	Dense Fog Advisory	EAX	7 hr
Mar 25, 4:49 AM CDT	Dense Fog Advisory	EAX	5 hr
Mar 28, 1:34 AM CDT	Mesoscale Discussion	SPC	56 min
Mar 28, 2:07 AM CDT	Dense Fog Advisory	EAX	7 hr
Mar 28, 4:10 AM CDT	Wind Advisory	EAX	25 hr
Mar 28, 1:33 PM CDT	Mesoscale Discussion	SPC	117 min
Apr 9, 2:39 AM CDT	Wind Advisory	EAX	16 hr
Apr 12, 4:09 AM CDT	Wind Advisory	EAX	24 hr
Apr 15, 4:01 PM CDT	Winter Storm Watch	EAX	5 hr
Apr 15, 9:02 PM CDT	Winter Storm Warning	EAX	32 hr
Apr 16, 5:43 PM CDT	Mesoscale Discussion	SPC	4 hr
Apr 29, 3:19 AM CDT	Wind Advisory	EAX	16 hr
May 8, 3:06 AM CDT	Frost Advisory	EAX	29 hr
May 10, 2:49 PM CDT	Frost Advisory	EAX	16 hr
May 13, 11:48 PM CDT	Mesoscale Discussion	SPC	2 hr
May 14, 3:55 PM CDT	Mesoscale Discussion	SPC	95 min
May 14, 4:24 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
May 14, 6:01 PM CDT	Mesoscale Discussion	SPC	119 min
May 14, 7:28 PM CDT	Severe Thunderstorm Warning	EAX	47 min
May 14, 8:22 PM CDT	Mesoscale Discussion	SPC	113 min
May 14, 9:33 PM CDT	Areal Flood Advisory	EAX	3 hr
May 14, 10:34 PM CDT	Flash Flood Warning	EAX	6 hr
May 16, 6:45 PM CDT	Mesoscale Discussion	SPC	90 min
May 24, 3:33 AM CDT	Flash Flood Watch	EAX	61 hr
May 24, 4:13 AM CDT	Mesoscale Discussion	SPC	62 min
May 24, 1:13 PM CDT	Mesoscale Discussion	SPC	92 min
May 24, 3:25 PM CDT	Mesoscale Discussion	SPC	95 min
May 24, 4:46 PM CDT	Special Weather Statement	EAX	44 min
May 24, 5:04 PM CDT	Severe Thunderstorm Warning	EAX	26 min
May 25, 2:15 PM CDT	Mesoscale Discussion	SPC	90 min
May 25, 4:19 PM CDT	Special Weather Statement	EAX	41 min
May 25, 4:31 PM CDT	Severe Thunderstorm Warning	EAX	29 min
May 25, 4:51 PM CDT	Severe Thunderstorm Warning	EAX	24 min
May 26, 12:29 PM CDT	Mesoscale Discussion	SPC	2 hr
May 26, 1:03 PM CDT	Special Weather Statement	EAX	42 min
May 28, 1:48 PM CDT	Areal Flood Warning	EAX	21 hr
Jun 4, 11:32 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 5, 1:59 AM CDT	Mesoscale Discussion	SPC	91 min
Jun 5, 3:41 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 7, 2:42 PM CDT	Flash Flood Watch	EAX	56 hr
Jun 9, 9:21 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 18, 6:30 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 22, 4:06 AM CDT	Areal Flood Warning	EAX	6 hr
Jun 26, 7:50 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 26, 10:41 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 26, 11:37 PM CDT	Severe Thunderstorm Warning	EAX	23 min
Jun 26, 11:59 PM CDT	Special Weather Statement	EAX	46 min
Jun 27, 1:28 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 28, 5:45 AM CDT	Special Weather Statement	EAX	45 min
Jun 28, 6:22 AM CDT	Special Weather Statement	EAX	38 min
Jul 16, 2:48 PM CDT	Heat Advisory	EAX	3 days
Jul 26, 3:53 AM CDT	Heat Advisory	EAX	15 hr
Aug 10, 11:29 AM CDT	Severe Thunderstorm Warning	EAX	46 min
Aug 10, 12:58 PM CDT	Severe Thunderstorm Warning	EAX	62 min
Aug 10, 1:58 PM CDT	Severe Thunderstorm Warning	EAX	59 min
Aug 15, 4:07 AM CDT	Special Weather Statement	EAX	53 min
Aug 28, 2:56 PM CDT	Mesoscale Discussion	SPC	64 min
Sep 2, 2:14 AM CDT	Dense Fog Advisory	EAX	7 hr
Sep 7, 7:14 PM CDT	Mesoscale Discussion	SPC	2 hr
Oct 11, 12:58 PM CDT	Wind Advisory	EAX	15 hr
Oct 15, 2:42 PM CDT	Frost Advisory	EAX	17 hr
Oct 16, 2:07 PM CDT	Wind Advisory	EAX	25 hr
Oct 21, 9:15 PM CDT	Dense Fog Advisory	EAX	14 hr
Oct 23, 3:37 AM CDT	Freeze Warning	EAX	30 hr
Oct 25, 3:02 PM CDT	Winter Weather Advisory	EAX	40 hr
Nov 14, 3:33 AM CST	Wind Advisory	EAX	35 hr
Nov 23, 3:26 PM CST	Winter Weather Advisory	EAX	6 hr
Dec 7, 8:39 PM CST	Dense Fog Advisory	EAX	15 hr
Dec 22, 2:03 PM CST	Wind Advisory	EAX	31 hr
Dec 27, 9:28 AM CST	Winter Weather Advisory	EAX	3 hr
Dec 28, 3:29 AM CST	Winter Weather Advisory	EAX	48 hr
Dec 29, 3:32 AM CST	Winter Storm Warning	EAX	24 hr
Dec 29, 10:02 AM CST	Mesoscale Discussion	SPC	5 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	8
Severe Thunderstorm Watch	4
Tornado Watch	1
Mesoscale Discussion	27
Special Weather Statement	7
Flooding
Areal Flood Warning	2
Flash Flood Warning	1
Flash Flood Watch	2
Areal Flood Advisory	1
Winter
Winter Storm Warning	3
Winter Storm Watch	3
Winter Weather Advisory	9
Heat
Heat Advisory	2
Cold
Freeze Warning	1
Frost Advisory	3
Wind Chill Advisory	3
Wind and dust
Wind Advisory	10
Fire
Red Flag Warning	2
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	9

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.