Weather alerts in Ozark County, Missouri, 2009

177 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Ozark County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts: 177
Warnings: 63
Watches: 40
Advisories: 26
Busiest month: June33 alerts
Busiest day: April 10, 20098 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 Ozark County in 2009 had a tornado report inside them; 0 of 2 tornado reports fell inside a warning.

Ozark County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	6	1	83%	2	0%
Severe thunderstorm warnings	19	9	53%	7	100%	28 min
Flash flood warnings	13	5	62%	8	100%	254 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Springfield, MO: tornado warnings	125	17	86%	48	65%	19 min
NWS Springfield, MO: severe thunderstorm warnings	398	172	57%	548	78%	31 min
NWS Springfield, MO: flash flood warnings	190	119	37%	379	92%	246 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 5, 2:24 PM CST	Winter Weather Advisory	SGF	15 hr
Jan 14, 3:24 AM CST	Wind Chill Advisory	SGF	33 hr
Jan 25, 4:32 AM CST	Winter Storm Watch	SGF	23 hr
Jan 25, 8:50 PM CST	Ice Storm Warning	SGF	31 hr
Jan 26, 3:19 AM CST	Winter Storm Warning	SGF	50 hr
Jan 26, 6:59 PM CST	Mesoscale Discussion	SPC	5 hr
Jan 26, 11:44 PM CST	Mesoscale Discussion	SPC	5 hr
Jan 27, 6:06 AM CST	Mesoscale Discussion	SPC	5 hr
Jan 27, 12:16 PM CST	Mesoscale Discussion	SPC	6 hr
Jan 29, 7:53 AM CST	Freezing Fog Advisory	SGF	2 hr
Feb 9, 3:32 PM CST	Flash Flood Watch	SGF	44 hr
Feb 10, 2:18 PM CST	Wind Advisory	SGF	23 hr
Feb 10, 4:50 PM CST	Mesoscale Discussion	SPC	85 min
Feb 10, 5:32 PM CST	Tornado Watch	SPC	6 hr
Feb 10, 10:58 PM CST	Severe Thunderstorm Warning	SGF	62 min
Feb 10, 11:13 PM CST	Mesoscale Discussion	SPC	92 min
Feb 10, 11:45 PM CST	Tornado Watch	SPC	6 hr
Feb 11, 5:45 AM CST	Areal Flood Warning	SGF	11 hr
Feb 11, 8:41 AM CST	Areal Flood Warning	SGF	8 hr
Feb 11, 4:56 PM CST	Areal Flood Warning	SGF	18 hr
Feb 17, 9:45 PM CST	Mesoscale Discussion	SPC	2 hr
Feb 17, 11:23 PM CST	Severe Thunderstorm Warning	SGF	37 min
Feb 26, 5:19 PM CST	Severe Thunderstorm Watch	SPC	7 hr
Feb 26, 7:42 PM CST	Mesoscale Discussion	SPC	93 min
Feb 26, 9:48 PM CST	Severe Thunderstorm Warning	SGF	57 min
Feb 27, 3:20 PM CST	Winter Weather Advisory	SGF	29 hr
Mar 5, 9:09 AM CST	Wind Advisory	SGF	9 hr
Mar 8, 6:32 AM CDT	Tornado Watch	SPC	7 hr
Mar 10, 3:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 11, 2:06 PM CDT	Winter Weather Advisory	SGF	14 hr
Mar 16, 5:32 AM CDT	Dense Fog Advisory	SGF	5 hr
Mar 17, 4:09 AM CDT	Dense Fog Advisory	SGF	5 hr
Mar 23, 3:21 PM CDT	Red Flag Warning	SGF	7 hr
Mar 24, 9:38 AM CDT	Mesoscale Discussion	SPC	97 min
Mar 24, 12:02 PM CDT	Mesoscale Discussion	SPC	88 min
Mar 24, 3:39 PM CDT	Flash Flood Warning	SGF	6 hr
Mar 24, 9:58 PM CDT	Areal Flood Warning	SGF	12 hr
Mar 28, 5:22 AM CDT	Mesoscale Discussion	SPC	53 min
Mar 31, 3:27 PM CDT	Frost Advisory	SGF	18 hr
Apr 3, 9:47 AM CDT	Freeze Watch	SGF	53 hr
Apr 4, 12:38 PM CDT	Red Flag Warning	SGF	7 hr
Apr 5, 2:33 AM CDT	Freeze Watch	SGF	25 hr
Apr 5, 2:33 AM CDT	Freeze Warning	SGF	30 hr
Apr 5, 2:40 PM CDT	Freeze Warning	SGF	42 hr
Apr 7, 3:13 AM CDT	Frost Advisory	SGF	29 hr
Apr 9, 6:59 PM CDT	Mesoscale Discussion	SPC	91 min
Apr 9, 7:21 PM CDT	Tornado Watch	SPC	5 hr
Apr 9, 8:35 PM CDT	Severe Thunderstorm Warning	SGF	55 min
Apr 9, 8:44 PM CDT	Mesoscale Discussion	SPC	61 min
Apr 9, 8:54 PM CDT	Tornado Warning	SGF	51 min
Apr 9, 9:02 PM CDT	Tornado Warning	SGF	43 min
Apr 9, 9:19 PM CDT	Severe Thunderstorm Warning	SGF	56 min
Apr 9, 9:41 PM CDT	Tornado Warning	SGF	49 min
Apr 9, 9:43 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 14, 3:52 AM CDT	Frost Advisory	SGF	24 hr
Apr 19, 12:14 PM CDT	Mesoscale Discussion	SPC	61 min
Apr 20, 11:59 AM CDT	Areal Flood Advisory	SGF	26 hr
Apr 21, 4:28 AM CDT	Fire Weather Watch	SGF	6 hr
Apr 21, 10:22 AM CDT	Red Flag Warning	SGF	9 hr
Apr 27, 2:55 AM CDT	Flash Flood Watch	SGF	21 hr
Apr 27, 12:47 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 27, 3:28 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 27, 6:03 PM CDT	Mesoscale Discussion	SPC	27 min
Apr 27, 8:54 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 28, 5:43 PM CDT	Mesoscale Discussion	SPC	62 min
Apr 29, 3:06 AM CDT	Flash Flood Watch	SGF	4 days
May 1, 3:00 AM CDT	Mesoscale Discussion	SPC	2 hr
May 1, 3:21 PM CDT	Mesoscale Discussion	SPC	54 min
May 1, 9:36 PM CDT	Mesoscale Discussion	SPC	84 min
May 6, 4:35 AM CDT	Dense Fog Advisory	SGF	5 hr
May 7, 5:26 AM CDT	Dense Fog Advisory	SGF	4 hr
May 7, 2:21 PM CDT	Flash Flood Watch	SGF	21 hr
May 8, 4:55 AM CDT	Severe Thunderstorm Watch PDS	SPC	7 hr
May 8, 7:17 AM CDT	Mesoscale Discussion	SPC	58 min
May 8, 7:35 AM CDT	High Wind Warning	SGF	4 hr
May 8, 8:14 AM CDT	Severe Thunderstorm Warning	SGF	61 min
May 8, 8:55 AM CDT	Severe Thunderstorm Warning	SGF	65 min
May 8, 9:10 AM CDT	Tornado Warning	SGF	65 min
May 8, 9:18 AM CDT	Severe Thunderstorm Warning	SGF	57 min
May 8, 11:08 AM CDT	Mesoscale Discussion	SPC	67 min
May 12, 3:34 PM CDT	Flash Flood Watch	SGF	35 hr
May 12, 6:30 PM CDT	Wind Advisory	SGF	3 hr
May 13, 8:22 PM CDT	Mesoscale Discussion	SPC	53 min
May 13, 9:56 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 13, 11:27 PM CDT	Mesoscale Discussion	SPC	93 min
May 13, 11:48 PM CDT	Tornado Warning	SGF	72 min
May 14, 12:05 AM CDT	Flash Flood Warning	SGF	6 hr
May 15, 2:59 PM CDT	Flash Flood Watch	SGF	13 hr
May 27, 2:58 PM CDT	Severe Thunderstorm Warning	SGF	30 min
Jun 2, 3:29 AM CDT	Flash Flood Watch	SGF	23 hr
Jun 8, 3:20 PM CDT	Mesoscale Discussion	SPC	85 min
Jun 8, 4:33 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 8, 6:36 PM CDT	Severe Thunderstorm Warning	SGF	40 min
Jun 8, 7:18 PM CDT	Mesoscale Discussion	SPC	57 min
Jun 9, 1:31 PM CDT	Tornado Watch	SPC	8 hr
Jun 9, 6:22 PM CDT	Mesoscale Discussion	SPC	53 min
Jun 9, 9:15 PM CDT	Mesoscale Discussion	SPC	60 min
Jun 9, 9:46 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 10, 2:26 AM CDT	Mesoscale Discussion	SPC	64 min
Jun 10, 3:33 AM CDT	Mesoscale Discussion	SPC	27 min
Jun 10, 11:47 AM CDT	Flash Flood Watch	SGF	18 hr
Jun 10, 5:15 PM CDT	Tornado Watch	SPC	7 hr
Jun 10, 7:10 PM CDT	Mesoscale Discussion	SPC	65 min
Jun 11, 6:40 PM CDT	Flash Flood Watch	SGF	21 hr
Jun 12, 7:46 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 13, 2:33 AM CDT	Dense Fog Advisory	SGF	5 hr
Jun 15, 11:59 AM CDT	Mesoscale Discussion	SPC	61 min
Jun 15, 12:52 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 15, 2:21 PM CDT	Severe Thunderstorm Warning	SGF	54 min
Jun 15, 3:35 PM CDT	Flash Flood Watch	SGF	20 hr
Jun 15, 3:47 PM CDT	Mesoscale Discussion	SPC	88 min
Jun 15, 6:31 PM CDT	Severe Thunderstorm Warning	SGF	59 min
Jun 15, 6:50 PM CDT	Mesoscale Discussion	SPC	85 min
Jun 15, 7:03 PM CDT	Severe Thunderstorm Warning	SGF	57 min
Jun 15, 7:30 PM CDT	Severe Thunderstorm Warning	SGF	20 min
Jun 15, 7:39 PM CDT	Flash Flood Warning	SGF	6 hr
Jun 15, 8:01 PM CDT	Severe Thunderstorm Warning	SGF	33 min
Jun 16, 8:21 AM CDT	Flash Flood Warning	SGF	5 hr
Jun 23, 4:00 AM CDT	Heat Advisory	SGF	42 hr
Jun 25, 4:05 AM CDT	Heat Advisory	SGF	65 hr
Jun 30, 7:57 AM CDT	Mesoscale Discussion	SPC	93 min
Jun 30, 3:55 PM CDT	Severe Thunderstorm Warning	SGF	43 min
Jul 4, 11:52 AM CDT	Mesoscale Discussion	SPC	53 min
Jul 4, 12:25 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 12, 2:46 AM CDT	Flash Flood Warning	SGF	3 hr
Jul 12, 4:56 AM CDT	Areal Flood Warning	SGF	5 hr
Jul 15, 2:25 PM CDT	Mesoscale Discussion	SPC	95 min
Jul 15, 2:48 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 16, 3:13 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 16, 5:39 PM CDT	Severe Thunderstorm Warning	SGF	66 min
Jul 16, 6:56 PM CDT	Mesoscale Discussion	SPC	64 min
Jul 20, 7:24 PM CDT	Flash Flood Watch	SGF	20 hr
Jul 28, 7:28 PM CDT	Severe Thunderstorm Warning	SGF	32 min
Jul 28, 7:58 PM CDT	Severe Thunderstorm Warning	SGF	32 min
Aug 4, 3:09 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 4, 6:21 PM CDT	Mesoscale Discussion	SPC	114 min
Aug 4, 8:35 PM CDT	Mesoscale Discussion	SPC	85 min
Aug 5, 12:31 AM CDT	Flash Flood Warning	SGF	9 hr
Aug 9, 4:24 PM CDT	Flash Flood Warning	SGF	3 hr
Aug 10, 1:24 PM CDT	Mesoscale Discussion	SPC	96 min
Aug 17, 1:44 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 19, 8:48 PM CDT	Tornado Watch	SPC	7 hr
Aug 19, 11:11 PM CDT	Mesoscale Discussion	SPC	64 min
Sep 5, 2:17 AM CDT	Flash Flood Warning	SGF	5 hr
Sep 5, 6:34 AM CDT	Areal Flood Warning	SGF	5 hr
Sep 5, 11:56 AM CDT	Areal Flood Warning	SGF	6 hr
Sep 6, 8:39 PM CDT	Dense Fog Advisory	SGF	13 hr
Sep 19, 11:19 AM CDT	Flash Flood Warning	SGF	6 hr
Sep 19, 4:50 PM CDT	Areal Flood Warning	SGF	18 hr
Sep 21, 3:25 AM CDT	Flash Flood Watch	SGF	24 hr
Sep 21, 4:00 AM CDT	Dense Fog Advisory	SGF	5 hr
Sep 21, 8:19 PM CDT	Flash Flood Warning	SGF	6 hr
Sep 22, 1:57 AM CDT	Areal Flood Warning	SGF	8 hr
Sep 22, 9:59 AM CDT	Areal Flood Warning	SGF	8 hr
Sep 22, 5:44 PM CDT	Areal Flood Warning	SGF	18 hr
Oct 1, 5:12 PM CDT	Mesoscale Discussion	SPC	93 min
Oct 7, 4:00 AM CDT	Flash Flood Watch	SGF	47 hr
Oct 8, 7:35 PM CDT	Mesoscale Discussion	SPC	55 min
Oct 8, 7:55 PM CDT	Flash Flood Warning	SGF	14 hr
Oct 8, 8:00 PM CDT	Tornado Watch	SPC	7 hr
Oct 8, 9:10 PM CDT	Tornado Warning	SGF	15 min
Oct 9, 10:00 AM CDT	Areal Flood Warning	SGF	24 hr
Oct 10, 9:58 AM CDT	Areal Flood Warning	SGF	24 hr
Oct 17, 2:33 AM CDT	Frost Advisory	SGF	30 hr
Oct 23, 2:52 AM CDT	Frost Advisory	SGF	30 hr
Oct 28, 3:30 PM CDT	Flash Flood Watch	SGF	36 hr
Oct 29, 2:39 PM CDT	Areal Flood Warning	SGF	4 hr
Oct 29, 6:56 PM CDT	Areal Flood Warning	SGF	15 hr
Oct 29, 8:57 PM CDT	Flash Flood Warning	SGF	6 hr
Oct 30, 2:59 AM CDT	Flash Flood Warning	SGF	6 hr
Oct 30, 8:59 AM CDT	Areal Flood Warning	SGF	9 hr
Oct 30, 6:00 PM CDT	Areal Flood Warning	SGF	18 hr
Nov 4, 3:36 AM CST	Frost Advisory	SGF	28 hr
Nov 15, 12:46 PM CST	Flood Watch	SGF	18 hr
Dec 22, 5:34 PM CST	Flash Flood Watch	SGF	42 hr
Dec 24, 4:00 AM CST	Winter Weather Advisory	SGF	29 hr
Dec 30, 11:23 PM CST	Dense Fog Advisory	SGF	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	19
Tornado Warning	6
Severe Thunderstorm Watch	12
Tornado Watch	8
Mesoscale Discussion	48
Flooding
Areal Flood Warning	17
Flash Flood Warning	13
Flash Flood Watch	15
Flood Watch	1
Areal Flood Advisory	1
Winter
Ice Storm Warning	1
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	4
Heat
Heat Advisory	2
Cold
Freeze Warning	2
Freeze Watch	2
Frost Advisory	6
Wind Chill Advisory	1
Wind and dust
High Wind Warning	1
Wind Advisory	3
Fire
Red Flag Warning	3
Fire Weather Watch	1
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 2008 2010

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.