Alert archive / Oklahoma / Cleveland County

Weather alerts in Cleveland County, Oklahoma, 2011

218 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Cleveland County and its neighbors

Each county as a circle sized by its count in 2011. Tap one for its archive.

Alerts: 218
Warnings: 52
Watches: 35
Advisories: 37
Busiest month: April46 alerts
Busiest day: April 24, 201110 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 4 tornado warnings covering Cleveland County in 2011 had a tornado report inside them.

Cleveland County, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	4	2	50%	0
Severe thunderstorm warnings	32	19	41%	29	76%	20 min
Flash flood warnings	1	0	100%	0

Each office's whole area, 2011

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Norman, OK: tornado warnings	85	27	68%	37	95%	25 min
NWS Norman, OK: severe thunderstorm warnings	637	329	48%	797	83%	26 min
NWS Norman, OK: flash flood warnings	8	6	25%	10	90%	74 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 10, 8:12 AM CST	Freezing Rain Advisory	OUN	4 hr
Jan 15, 7:45 AM CST	Dense Fog Advisory	OUN	3 hr
Jan 17, 3:37 AM CST	Dense Fog Advisory	OUN	7 hr
Jan 19, 4:30 AM CST	Winter Weather Advisory	OUN	31 hr
Jan 19, 10:50 PM CST	Mesoscale Discussion	SPC	4 hr
Jan 30, 3:46 AM CST	Winter Storm Watch	OUN	25 hr
Jan 30, 3:08 PM CST	Winter Storm Warning	OUN	48 hr
Jan 31, 3:45 PM CST	Blizzard Warning	OUN	23 hr
Jan 31, 9:04 PM CST	Mesoscale Discussion	SPC	6 hr
Feb 1, 3:11 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 1, 3:04 PM CST	Wind Chill Advisory	OUN	45 hr
Feb 4, 4:42 AM CST	Winter Weather Advisory	OUN	11 hr
Feb 6, 5:32 PM CST	Winter Storm Watch	OUN	36 hr
Feb 7, 12:03 PM CST	Winter Storm Warning	OUN	48 hr
Feb 9, 3:29 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 9, 10:05 AM CST	Wind Chill Advisory	OUN	24 hr
Feb 16, 4:16 AM CST	Dense Fog Advisory	OUN	7 hr
Feb 24, 4:10 AM CST	Severe Thunderstorm Watch	SPC	7 hr
Feb 24, 7:47 AM CST	Mesoscale Discussion	SPC	118 min
Feb 26, 8:49 AM CST	Dense Fog Advisory	OUN	2 hr
Mar 9, 4:27 AM CST	Fire Weather Watch	OUN	47 hr
Mar 10, 4:15 AM CST	Red Flag Warning	OUN	39 hr
Mar 11, 10:48 AM CST	Wind Advisory	OUN	8 hr
Mar 19, 3:05 PM CDT	Mesoscale Discussion	SPC	85 min
Mar 21, 3:33 PM CDT	Red Flag Warning	OUN	29 hr
Mar 21, 10:01 PM CDT	Fire Weather Watch	OUN	6 hr
Mar 22, 3:42 AM CDT	Wind Advisory	OUN	15 hr
Mar 22, 3:20 PM CDT	Mesoscale Discussion	SPC	85 min
Apr 3, 4:19 AM CDT	Wind Advisory	OUN	35 hr
Apr 3, 11:42 PM CDT	Special Weather Statement	OUN	18 min
Apr 4, 12:05 AM CDT	Special Weather Statement	OUN	25 min
Apr 4, 12:31 AM CDT	Special Weather Statement	OUN	29 min
Apr 4, 5:30 AM CDT	Fire Weather Watch	OUN	23 hr
Apr 5, 4:28 AM CDT	Red Flag Warning	OUN	16 hr
Apr 8, 2:26 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 8, 2:45 PM CDT	Fire Weather Watch	OUN	25 hr
Apr 9, 3:03 PM CDT	Wind Advisory	OUN	29 hr
Apr 9, 3:18 PM CDT	Red Flag Warning	OUN	30 hr
Apr 13, 3:27 AM CDT	Fire Weather Watch	OUN	25 hr
Apr 13, 3:58 PM CDT	Red Flag Warning	OUN	29 hr
Apr 14, 3:58 AM CDT	Wind Advisory	OUN	42 hr
Apr 14, 1:33 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 14, 2:28 PM CDT	Tornado Watch PDS	SPC	7 hr
Apr 16, 4:30 AM CDT	Fire Weather Watch	OUN	24 hr
Apr 17, 4:47 AM CDT	Red Flag Warning	OUN	15 hr
Apr 17, 11:57 AM CDT	Wind Advisory	OUN	8 hr
Apr 18, 4:45 AM CDT	Fire Weather Watch	OUN	24 hr
Apr 22, 1:23 PM CDT	Mesoscale Discussion	SPC	97 min
Apr 22, 3:47 PM CDT	Tornado Watch	SPC	8 hr
Apr 22, 5:46 PM CDT	Special Weather Statement	OUN	14 min
Apr 22, 6:03 PM CDT	Severe Thunderstorm Warning	OUN	57 min
Apr 22, 7:00 PM CDT	Severe Thunderstorm Warning	OUN	60 min
Apr 22, 10:18 PM CDT	Severe Thunderstorm Warning	OUN	57 min
Apr 22, 11:10 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 22, 11:22 PM CDT	Severe Thunderstorm Warning	OUN	53 min
Apr 22, 11:35 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 22, 11:49 PM CDT	Severe Thunderstorm Warning	OUN	56 min
Apr 23, 9:08 PM CDT	Mesoscale Discussion	SPC	97 min
Apr 23, 9:53 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 24, 2:02 AM CDT	Mesoscale Discussion	SPC	88 min
Apr 24, 4:17 AM CDT	Mesoscale Discussion	SPC	28 min
Apr 24, 10:10 AM CDT	Special Weather Statement	OUN	20 min
Apr 24, 11:17 AM CDT	Special Weather Statement	OUN	13 min
Apr 24, 1:59 PM CDT	Special Weather Statement	OUN	31 min
Apr 24, 2:03 PM CDT	Severe Thunderstorm Warning	OUN	42 min
Apr 24, 2:24 PM CDT	Severe Thunderstorm Warning	OUN	66 min
Apr 24, 2:28 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 24, 7:33 PM CDT	Special Weather Statement	OUN	27 min
Apr 24, 7:54 PM CDT	Special Weather Statement	OUN	21 min
Apr 25, 2:52 AM CDT	Dense Fog Advisory	OUN	7 hr
Apr 25, 5:24 PM CDT	Mesoscale Discussion	SPC	66 min
Apr 26, 3:15 PM CDT	Mesoscale Discussion	SPC	90 min
Apr 26, 7:08 PM CDT	Mesoscale Discussion	SPC	97 min
Apr 28, 4:28 AM CDT	Wind Advisory	OUN	45 hr
May 1, 9:53 AM CDT	Special Weather Statement	OUN	22 min
May 1, 11:09 AM CDT	Special Weather Statement	OUN	21 min
May 1, 11:28 AM CDT	Special Weather Statement	OUN	32 min
May 1, 11:58 AM CDT	Special Weather Statement	OUN	32 min
May 1, 12:23 PM CDT	Special Weather Statement	OUN	22 min
May 1, 12:52 PM CDT	Special Weather Statement	OUN	23 min
May 2, 2:54 AM CDT	Frost Advisory	OUN	30 hr
May 8, 9:59 PM CDT	Special Weather Statement	OUN	16 min
May 10, 1:12 PM CDT	Mesoscale Discussion	SPC	2 hr
May 11, 12:33 PM CDT	Severe Thunderstorm Warning	OUN	57 min
May 11, 12:37 PM CDT	Severe Thunderstorm Warning	OUN	31 min
May 11, 1:16 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
May 11, 3:04 PM CDT	Special Weather Statement	OUN	56 min
May 11, 3:21 PM CDT	Severe Thunderstorm Warning	OUN	54 min
May 11, 3:30 PM CDT	Areal Flood Advisory	OUN	3 hr
May 11, 3:34 PM CDT	Severe Thunderstorm Warning	OUN	71 min
May 18, 2:44 PM CDT	Mesoscale Discussion	SPC	61 min
May 18, 3:48 PM CDT	Tornado Watch	SPC	3 hr
May 18, 6:48 PM CDT	Mesoscale Discussion	SPC	87 min
May 19, 12:46 PM CDT	Tornado Watch	SPC	9 hr
May 19, 5:21 PM CDT	Mesoscale Discussion	SPC	84 min
May 19, 8:08 PM CDT	Severe Thunderstorm Warning	OUN	52 min
May 19, 10:45 PM CDT	Special Weather Statement	OUN	30 min
May 19, 11:26 PM CDT	Severe Thunderstorm Warning	OUN	22 min
May 20, 12:42 AM CDT	Special Weather Statement	OUN	33 min
May 20, 5:04 AM CDT	Special Weather Statement	OUN	56 min
May 20, 5:29 AM CDT	Areal Flood Advisory	OUN	3 hr
May 20, 8:45 AM CDT	Areal Flood Advisory	OUN	3 hr
May 23, 5:07 AM CDT	Mesoscale Discussion	SPC	113 min
May 23, 2:30 PM CDT	Tornado Watch	SPC	8 hr
May 23, 6:51 PM CDT	Mesoscale Discussion	SPC	84 min
May 23, 9:42 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 24, 12:18 PM CDT	Mesoscale Discussion	SPC	87 min
May 24, 12:47 PM CDT	Tornado Watch PDS	SPC	11 hr
May 24, 3:44 PM CDT	Special Weather Statement	OUN	16 min
May 24, 4:48 PM CDT	Mesoscale Discussion	SPC	87 min
May 24, 5:23 PM CDT	Tornado Warning	OUN	37 min
May 24, 5:48 PM CDT	Tornado Warning	OUN	42 min
May 24, 5:55 PM CDT	Tornado Warning	OUN	50 min
May 24, 6:21 PM CDT	Tornado Warning	OUN	54 min
May 24, 6:43 PM CDT	Mesoscale Discussion	SPC	62 min
May 29, 7:10 PM CDT	Wind Advisory	OUN	29 hr
May 31, 5:06 AM CDT	Special Weather Statement	OUN	39 min
Jun 9, 9:56 PM CDT	Mesoscale Discussion	SPC	79 min
Jun 10, 9:20 AM CDT	Special Weather Statement	OUN	25 min
Jun 10, 3:31 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 11, 12:45 AM CDT	Special Weather Statement	OUN	30 min
Jun 11, 2:28 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 14, 3:36 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 14, 5:27 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 14, 6:59 PM CDT	Severe Thunderstorm Warning	OUN	61 min
Jun 14, 7:02 PM CDT	Mesoscale Discussion	SPC	58 min
Jun 14, 7:27 PM CDT	Severe Thunderstorm Warning	OUN	48 min
Jun 14, 8:15 PM CDT	Severe Thunderstorm Warning	OUN	60 min
Jun 14, 8:54 PM CDT	Mesoscale Discussion	SPC	66 min
Jun 16, 3:54 PM CDT	Wind Advisory	OUN	13 hr
Jun 18, 3:54 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 19, 10:37 PM CDT	Wind Advisory	OUN	23 hr
Jun 20, 10:42 AM CDT	Mesoscale Discussion	SPC	63 min
Jun 20, 3:21 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 20, 3:42 PM CDT	Severe Thunderstorm Watch PDS	SPC	7 hr
Jun 20, 5:35 PM CDT	Mesoscale Discussion	SPC	85 min
Jun 20, 7:56 PM CDT	Mesoscale Discussion	SPC	94 min
Jun 20, 8:35 PM CDT	Severe Thunderstorm Warning	OUN	55 min
Jun 20, 9:46 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 24, 12:29 AM CDT	Special Weather Statement	OUN	26 min
Jun 24, 12:56 AM CDT	Special Weather Statement	OUN	34 min
Jun 24, 2:47 PM CDT	Heat Advisory	OUN	3 days
Jun 29, 8:11 AM CDT	Special Weather Statement	OUN	19 min
Jul 1, 6:36 PM CDT	Special Weather Statement	OUN	24 min
Jul 1, 6:59 PM CDT	Special Weather Statement	OUN	31 min
Jul 4, 4:49 PM CDT	Severe Thunderstorm Warning	OUN	26 min
Jul 6, 2:04 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 10, 10:22 AM CDT	Heat Advisory	OUN	22 days
Jul 12, 1:03 PM CDT	Mesoscale Discussion	SPC	57 min
Jul 12, 1:15 PM CDT	Severe Thunderstorm Warning	OUN	45 min
Jul 12, 2:32 PM CDT	Severe Thunderstorm Warning	OUN	58 min
Jul 12, 5:23 PM CDT	Special Weather Statement	OUN	37 min
Jul 12, 7:05 PM CDT	Special Weather Statement	OUN	25 min
Jul 12, 7:27 PM CDT	Special Weather Statement	OUN	33 min
Jul 13, 6:02 PM CDT	Severe Thunderstorm Warning	OUN	43 min
Aug 1, 2:30 AM CDT	Excessive Heat Warning	OUN	8 days
Aug 3, 2:29 PM CDT	Mesoscale Discussion	SPC	91 min
Aug 3, 3:15 PM CDT	Special Weather Statement	OUN	30 min
Aug 3, 4:03 PM CDT	Special Weather Statement	OUN	27 min
Aug 3, 4:25 PM CDT	Severe Thunderstorm Warning	OUN	50 min
Aug 3, 4:40 PM CDT	Special Weather Statement	OUN	20 min
Aug 6, 2:21 PM CDT	Fire Weather Watch	OUN	38 hr
Aug 7, 2:23 PM CDT	Heat Advisory	OUN	5 days
Aug 8, 4:43 AM CDT	Red Flag Warning	OUN	16 hr
Aug 8, 5:30 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 8, 7:34 PM CDT	Mesoscale Discussion	SPC	116 min
Aug 8, 7:53 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 8, 8:26 PM CDT	Severe Thunderstorm Warning	OUN	64 min
Aug 8, 9:24 PM CDT	Severe Thunderstorm Warning	OUN	36 min
Aug 8, 11:00 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 8, 11:12 PM CDT	Special Weather Statement	OUN	18 min
Aug 9, 10:23 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 10, 12:38 AM CDT	Special Weather Statement	OUN	22 min
Aug 10, 1:32 AM CDT	Mesoscale Discussion	SPC	58 min
Aug 10, 3:34 AM CDT	Special Weather Statement	OUN	11 min
Aug 11, 9:54 AM CDT	Special Weather Statement	OUN	36 min
Aug 11, 10:14 AM CDT	Severe Thunderstorm Warning	OUN	31 min
Aug 12, 2:54 PM CDT	Mesoscale Discussion	SPC	96 min
Aug 12, 3:16 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 12, 5:24 PM CDT	Special Weather Statement	OUN	36 min
Aug 12, 5:51 PM CDT	Severe Thunderstorm Warning	OUN	54 min
Aug 12, 9:44 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 12, 10:41 PM CDT	Special Weather Statement	OUN	19 min
Aug 12, 11:47 PM CDT	Mesoscale Discussion	SPC	88 min
Aug 16, 3:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 17, 3:44 PM CDT	Heat Advisory	OUN	14 days
Aug 24, 4:44 PM CDT	Mesoscale Discussion	SPC	91 min
Aug 30, 4:39 AM CDT	Red Flag Warning	OUN	16 hr
Aug 30, 3:41 PM CDT	Red Flag Warning	OUN	29 hr
Sep 17, 10:17 PM CDT	Mesoscale Discussion	SPC	88 min
Oct 18, 3:31 PM CDT	Freeze Watch	OUN	13 hr
Oct 19, 4:06 AM CDT	Freeze Warning	OUN	29 hr
Oct 22, 1:49 PM CDT	Mesoscale Discussion	SPC	116 min
Oct 22, 3:37 PM CDT	Severe Thunderstorm Watch	SPC	14 hr
Oct 22, 6:59 PM CDT	Severe Thunderstorm Warning	OUN	76 min
Oct 22, 7:01 PM CDT	Mesoscale Discussion	SPC	119 min
Oct 22, 7:31 PM CDT	Severe Thunderstorm Warning	OUN	74 min
Oct 22, 7:43 PM CDT	Severe Thunderstorm Warning	OUN	77 min
Oct 28, 4:42 AM CDT	Frost Advisory	OUN	28 hr
Nov 1, 3:46 PM CDT	Wind Advisory	OUN	33 hr
Nov 2, 3:41 PM CDT	Freeze Watch	OUN	12 hr
Nov 3, 4:04 AM CDT	Freeze Warning	OUN	30 hr
Nov 5, 10:09 AM CDT	Wind Advisory	OUN	9 hr
Nov 7, 7:00 PM CST	Flash Flood Watch	OUN	15 hr
Nov 7, 7:43 PM CST	Mesoscale Discussion	SPC	62 min
Nov 7, 8:28 PM CST	Tornado Watch	SPC	8 hr
Nov 7, 10:10 PM CST	Flash Flood Warning	OUN	3 hr
Nov 7, 10:47 PM CST	Severe Thunderstorm Warning	OUN	45 min
Nov 7, 10:59 PM CST	Severe Thunderstorm Warning	OUN	61 min
Nov 7, 11:20 PM CST	Severe Thunderstorm Warning	OUN	55 min
Nov 7, 11:20 PM CST	Mesoscale Discussion	SPC	85 min
Nov 12, 3:45 AM CST	Wind Advisory	OUN	14 hr
Nov 18, 4:35 AM CST	Wind Advisory	OUN	13 hr
Nov 21, 3:44 PM CST	Mesoscale Discussion	SPC	91 min
Nov 21, 6:00 PM CST	Areal Flood Advisory	OUN	2 hr
Nov 22, 10:22 PM CST	Dense Fog Advisory	OUN	11 hr
Nov 25, 3:11 AM CST	Wind Advisory	OUN	40 hr
Dec 19, 11:35 PM CST	Dense Fog Advisory	OUN	6 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	32
Tornado Warning	4
Severe Thunderstorm Watch	15
Tornado Watch	7
Mesoscale Discussion	53
Special Weather Statement	41
Flooding
Flash Flood Warning	1
Flash Flood Watch	1
Areal Flood Advisory	4
Winter
Blizzard Warning	1
Winter Storm Warning	2
Winter Storm Watch	2
Freezing Rain Advisory	1
Winter Weather Advisory	2
Heat
Excessive Heat Warning	1
Heat Advisory	4
Cold
Freeze Warning	2
Freeze Watch	2
Frost Advisory	2
Wind Chill Advisory	2
Wind and dust
Wind Advisory	15
Fire
Red Flag Warning	9
Fire Weather Watch	8
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 2010 2012

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.