Alert archive / Oklahoma / Jefferson County

Weather alerts in Jefferson County, Oklahoma, 2009

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

Jefferson County and its neighbors

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

Alerts: 186
Warnings: 57
Watches: 47
Advisories: 29
Busiest month: April45 alerts
Busiest day: April 29, 200914 alerts

Over time

By month

Warning verification

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

0 of 1 tornado warnings covering Jefferson County in 2009 had a tornado report inside them.

Jefferson County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	33	15	55%	12	92%	18 min
Flash flood warnings	1	1	0%	3	67%	22 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Norman, OK: tornado warnings	42	12	71%	20	80%	20 min
NWS Norman, OK: severe thunderstorm warnings	772	319	59%	749	84%	26 min
NWS Norman, OK: flash flood warnings	28	10	64%	17	88%	81 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 2, 7:33 AM CST	Dense Fog Advisory	OUN	3 hr
Jan 5, 4:46 AM CST	Freezing Rain Advisory	OUN	11 hr
Jan 21, 10:43 AM CST	Fire Weather Watch	OUN	17 hr
Jan 22, 3:47 AM CST	Red Flag Warning	OUN	15 hr
Jan 25, 5:08 AM CST	Winter Storm Watch	OUN	23 hr
Jan 26, 4:32 AM CST	Winter Storm Warning	OUN	34 hr
Jan 26, 4:32 AM CST	Winter Weather Advisory	OUN	43 hr
Jan 27, 2:55 AM CST	Mesoscale Discussion	SPC	5 hr
Feb 6, 4:37 AM CST	Wind Advisory	OUN	13 hr
Feb 10, 12:17 PM CST	Mesoscale Discussion	SPC	118 min
Feb 10, 12:49 PM CST	Tornado Watch	SPC	9 hr
Feb 10, 2:33 PM CST	Mesoscale Discussion	SPC	87 min
Feb 10, 6:13 PM CST	Mesoscale Discussion	SPC	92 min
Feb 10, 6:28 PM CST	Severe Thunderstorm Warning	OUN	47 min
Feb 10, 6:28 PM CST	Severe Thunderstorm Warning	OUN	47 min
Feb 10, 6:45 PM CST	Severe Thunderstorm Warning	OUN	30 min
Feb 10, 6:50 PM CST	Tornado Warning	OUN	25 min
Feb 10, 7:18 PM CST	Mesoscale Discussion	SPC	57 min
Feb 14, 9:08 AM CST	Freezing Rain Advisory	OUN	4 hr
Feb 19, 3:52 AM CST	Fire Weather Watch	OUN	25 hr
Feb 20, 4:31 AM CST	Red Flag Warning	OUN	13 hr
Feb 20, 4:40 AM CST	Wind Advisory	OUN	31 hr
Feb 22, 7:09 PM CST	Fire Weather Watch	OUN	9 hr
Feb 23, 4:02 AM CST	Red Flag Warning	OUN	15 hr
Feb 25, 4:06 AM CST	Fire Weather Watch	OUN	24 hr
Feb 26, 3:55 AM CST	Red Flag Warning	OUN	15 hr
Mar 3, 5:10 PM CST	Fire Weather Watch	OUN	17 hr
Mar 4, 10:09 AM CST	Red Flag Warning	OUN	34 hr
Mar 9, 2:13 PM CDT	Mesoscale Discussion	SPC	62 min
Mar 9, 3:49 PM CDT	Tornado Watch	SPC	6 hr
Mar 16, 7:34 AM CDT	Dense Fog Advisory	OUN	2 hr
Mar 22, 3:03 PM CDT	Wind Advisory	OUN	31 hr
Mar 24, 12:16 AM CDT	Wind Advisory	OUN	4 hr
Mar 26, 4:52 PM CDT	Mesoscale Discussion	SPC	83 min
Mar 26, 7:32 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Mar 27, 2:56 PM CDT	Winter Weather Advisory	OUN	26 hr
Mar 30, 5:18 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Mar 30, 7:40 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 30, 8:25 PM CDT	Severe Thunderstorm Warning	OUN	50 min
Apr 1, 10:52 AM CDT	Wind Advisory	OUN	8 hr
Apr 2, 2:02 AM CDT	Wind Advisory	OUN	16 hr
Apr 2, 8:05 AM CDT	High Wind Warning	OUN	4 hr
Apr 4, 3:32 AM CDT	Wind Advisory	OUN	15 hr
Apr 4, 3:40 AM CDT	Red Flag Warning	OUN	16 hr
Apr 5, 3:50 AM CDT	Freeze Warning	OUN	30 hr
Apr 6, 9:57 AM CDT	Hard Freeze Warning	OUN	23 hr
Apr 7, 8:48 PM CDT	Fire Weather Watch	OUN	31 hr
Apr 8, 3:30 PM CDT	Red Flag Warning	OUN	31 hr
Apr 8, 8:27 PM CDT	Wind Advisory	OUN	26 hr
Apr 11, 9:10 PM CDT	Severe Thunderstorm Warning	OUN	35 min
Apr 12, 5:20 PM CDT	Mesoscale Discussion	SPC	55 min
Apr 12, 6:13 PM CDT	Severe Thunderstorm Warning	OUN	31 min
Apr 18, 8:31 AM CDT	Dense Fog Advisory	OUN	2 hr
Apr 18, 3:11 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Apr 26, 10:54 AM CDT	Mesoscale Discussion	SPC	66 min
Apr 26, 12:03 PM CDT	Wind Advisory	OUN	13 hr
Apr 26, 1:37 PM CDT	Tornado Watch PDS	SPC	5 hr
Apr 26, 5:44 PM CDT	Mesoscale Discussion	SPC	61 min
Apr 26, 6:16 PM CDT	Tornado Watch PDS	SPC	8 hr
Apr 26, 8:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 29, 3:49 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 29, 6:09 AM CDT	Mesoscale Discussion	SPC	96 min
Apr 29, 8:07 AM CDT	Severe Thunderstorm Warning	OUN	53 min
Apr 29, 8:18 AM CDT	Areal Flood Advisory	OUN	3 hr
Apr 29, 8:53 AM CDT	Flash Flood Warning	OUN	3 hr
Apr 29, 8:59 AM CDT	Severe Thunderstorm Warning	OUN	61 min
Apr 29, 9:16 AM CDT	Mesoscale Discussion	SPC	89 min
Apr 29, 9:58 AM CDT	Severe Thunderstorm Warning	OUN	62 min
Apr 29, 10:06 AM CDT	Areal Flood Advisory	OUN	114 min
Apr 29, 12:07 PM CDT	Flash Flood Watch	OUN	19 hr
Apr 29, 1:07 PM CDT	Areal Flood Advisory	OUN	113 min
Apr 29, 1:46 PM CDT	Areal Flood Warning	OUN	6 hr
Apr 29, 4:08 PM CDT	Severe Thunderstorm Warning	OUN	67 min
Apr 29, 6:21 PM CDT	Mesoscale Discussion	SPC	54 min
Apr 29, 8:50 PM CDT	Severe Thunderstorm Warning	OUN	55 min
Apr 29, 9:21 PM CDT	Areal Flood Warning	OUN	6 hr
Apr 29, 9:27 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 29, 11:27 PM CDT	Severe Thunderstorm Warning	OUN	63 min
Apr 29, 11:54 PM CDT	Mesoscale Discussion	SPC	96 min
Apr 30, 1:15 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 30, 2:13 AM CDT	Areal Flood Warning	OUN	6 hr
Apr 30, 3:13 AM CDT	Mesoscale Discussion	SPC	92 min
Apr 30, 2:11 PM CDT	River Flood Warning	OUN	44 hr
Apr 30, 3:14 PM CDT	Flash Flood Watch	OUN	61 hr
May 1, 2:48 PM CDT	Mesoscale Discussion	SPC	87 min
May 1, 3:09 PM CDT	Tornado Watch	SPC	7 hr
May 1, 7:19 PM CDT	Mesoscale Discussion	SPC	86 min
May 4, 3:40 PM CDT	Flash Flood Watch	OUN	39 hr
May 5, 6:40 AM CDT	Mesoscale Discussion	SPC	2 hr
May 5, 11:03 PM CDT	Mesoscale Discussion	SPC	117 min
May 5, 11:26 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 6, 2:00 AM CDT	Mesoscale Discussion	SPC	2 hr
May 6, 5:08 AM CDT	Mesoscale Discussion	SPC	97 min
May 6, 5:29 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
May 8, 3:42 PM CDT	Mesoscale Discussion	SPC	93 min
May 8, 5:52 PM CDT	Tornado Watch	SPC	11 hr
May 8, 7:26 PM CDT	Severe Thunderstorm Warning	OUN	49 min
May 8, 8:01 PM CDT	Severe Thunderstorm Warning	OUN	59 min
May 8, 9:07 PM CDT	Severe Thunderstorm Warning	OUN	38 min
May 8, 9:37 PM CDT	Severe Thunderstorm Warning	OUN	38 min
May 10, 3:09 PM CDT	Flash Flood Watch	OUN	32 hr
May 11, 8:04 AM CDT	Areal Flood Advisory	OUN	3 hr
May 13, 11:40 AM CDT	Flash Flood Watch	OUN	18 hr
May 13, 5:53 PM CDT	Mesoscale Discussion	SPC	67 min
May 13, 9:36 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 13, 11:27 PM CDT	Severe Thunderstorm Warning	OUN	63 min
May 13, 11:27 PM CDT	Mesoscale Discussion	SPC	93 min
May 14, 12:23 AM CDT	Severe Thunderstorm Warning	OUN	82 min
May 14, 12:25 AM CDT	Areal Flood Advisory	OUN	3 hr
May 14, 1:51 AM CDT	Severe Thunderstorm Warning	OUN	54 min
Jun 1, 4:40 PM CDT	Severe Thunderstorm Warning	OUN	35 min
Jun 3, 2:20 AM CDT	Severe Thunderstorm Warning	OUN	70 min
Jun 3, 2:34 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 7, 9:51 PM CDT	High Wind Warning	OUN	3 hr
Jun 8, 3:18 PM CDT	Mesoscale Discussion	SPC	57 min
Jun 8, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 10, 2:13 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
Jun 10, 2:20 PM CDT	Severe Thunderstorm Warning	OUN	55 min
Jun 10, 3:14 PM CDT	Severe Thunderstorm Warning	OUN	61 min
Jun 10, 5:38 PM CDT	Mesoscale Discussion	SPC	67 min
Jun 12, 2:16 PM CDT	Mesoscale Discussion	SPC	89 min
Jun 12, 3:29 PM CDT	Tornado Watch	SPC	9 hr
Jun 12, 7:15 PM CDT	Severe Thunderstorm Warning	OUN	45 min
Jun 12, 7:57 PM CDT	Severe Thunderstorm Warning	OUN	48 min
Jun 12, 8:42 PM CDT	Severe Thunderstorm Warning	OUN	35 min
Jun 12, 8:54 PM CDT	Mesoscale Discussion	SPC	66 min
Jun 13, 7:46 PM CDT	Mesoscale Discussion	SPC	59 min
Jun 13, 8:19 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 13, 8:26 PM CDT	High Wind Warning	OUN	3 hr
Jun 13, 8:52 PM CDT	Severe Thunderstorm Warning	OUN	53 min
Jun 19, 1:40 PM CDT	Mesoscale Discussion	SPC	95 min
Jul 4, 12:45 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 4, 6:57 PM CDT	Mesoscale Discussion	SPC	63 min
Jul 8, 4:11 AM CDT	Heat Advisory	OUN	9 days
Jul 16, 3:43 PM CDT	Severe Thunderstorm Warning	OUN	62 min
Jul 16, 4:27 PM CDT	Severe Thunderstorm Warning	OUN	63 min
Jul 16, 4:34 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jul 16, 9:31 PM CDT	Mesoscale Discussion	SPC	59 min
Jul 16, 11:37 PM CDT	Mesoscale Discussion	SPC	53 min
Jul 21, 1:10 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 21, 3:21 AM CDT	Mesoscale Discussion	SPC	114 min
Jul 21, 5:40 AM CDT	Mesoscale Discussion	SPC	35 min
Jul 29, 8:59 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 30, 1:00 AM CDT	Severe Thunderstorm Warning	OUN	60 min
Aug 5, 2:29 PM CDT	Mesoscale Discussion	SPC	91 min
Aug 5, 3:21 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 5, 5:18 PM CDT	Severe Thunderstorm Warning	OUN	57 min
Aug 5, 6:03 PM CDT	Severe Thunderstorm Warning	OUN	43 min
Aug 5, 8:33 PM CDT	Mesoscale Discussion	SPC	57 min
Aug 18, 11:54 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Aug 19, 1:24 AM CDT	Mesoscale Discussion	SPC	96 min
Aug 20, 2:32 PM CDT	Mesoscale Discussion	SPC	88 min
Aug 20, 3:08 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 26, 2:52 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 11, 11:15 AM CDT	Flood Watch	OUN	64 hr
Sep 21, 1:26 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 21, 2:00 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 21, 6:10 PM CDT	Mesoscale Discussion	SPC	65 min
Oct 6, 4:36 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Oct 6, 7:47 AM CDT	Mesoscale Discussion	SPC	88 min
Oct 7, 11:34 AM CDT	Flash Flood Watch	OUN	43 hr
Oct 8, 2:42 PM CDT	Mesoscale Discussion	SPC	63 min
Oct 8, 3:02 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Oct 8, 4:41 PM CDT	Tornado Watch	SPC	7 hr
Oct 8, 6:59 PM CDT	Mesoscale Discussion	SPC	61 min
Oct 14, 7:44 PM CDT	Dense Fog Advisory	OUN	5 hr
Oct 25, 5:20 PM CDT	Mesoscale Discussion	SPC	115 min
Oct 25, 7:13 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Oct 29, 1:07 AM CDT	Mesoscale Discussion	SPC	53 min
Oct 29, 1:59 AM CDT	Tornado Watch	SPC	5 hr
Oct 29, 3:40 AM CDT	Mesoscale Discussion	SPC	95 min
Oct 29, 5:31 AM CDT	Mesoscale Discussion	SPC	89 min
Oct 29, 6:40 AM CDT	Severe Thunderstorm Warning	OUN	50 min
Nov 11, 9:54 PM CST	Dense Fog Advisory	OUN	12 hr
Nov 16, 12:28 PM CST	Freeze Watch	OUN	25 hr
Nov 17, 1:00 PM CST	Freeze Warning	OUN	19 hr
Nov 21, 11:13 PM CST	Dense Fog Advisory	OUN	9 hr
Nov 23, 12:57 AM CST	Dense Fog Advisory	OUN	10 hr
Nov 24, 4:53 AM CST	Frost Advisory	OUN	5 hr
Nov 24, 4:53 AM CST	Freeze Warning	OUN	28 hr
Nov 25, 11:38 AM CST	Freeze Warning	OUN	21 hr
Dec 23, 4:21 AM CST	Winter Weather Advisory	OUN	19 hr
Dec 23, 2:47 PM CST	Winter Storm Warning	OUN	33 hr
Dec 24, 7:25 AM CST	Mesoscale Discussion	SPC	6 hr
Dec 24, 9:37 AM CST	Blizzard Warning	OUN	14 hr
Dec 28, 9:26 PM CST	Winter Weather Advisory	OUN	33 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	33
Tornado Warning	1
Severe Thunderstorm Watch	23
Tornado Watch	9
Mesoscale Discussion	53
Flooding
Areal Flood Warning	3
Flash Flood Warning	1
River Flood Warning	1
Flash Flood Watch	6
Flood Watch	1
Areal Flood Advisory	5
Winter
Blizzard Warning	1
Winter Storm Warning	2
Winter Storm Watch	1
Freezing Rain Advisory	2
Winter Weather Advisory	4
Heat
Heat Advisory	1
Cold
Freeze Warning	4
Hard Freeze Warning	1
Freeze Watch	1
Frost Advisory	1
Wind and dust
High Wind Warning	3
Wind Advisory	9
Fire
Red Flag Warning	7
Fire Weather Watch	6
Fog and smoke
Dense Fog Advisory	7

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.