Alert archive / Oklahoma / Ottawa County

Weather alerts in Ottawa County, Oklahoma, 2009

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

Ottawa County and its neighbors

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

Alerts: 241
Warnings: 85
Watches: 42
Advisories: 39
Busiest month: May49 alerts
Busiest day: May 1, 200918 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 2 tornado warnings covering Ottawa County in 2009 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Ottawa County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	2	1	50%	1	0%
Severe thunderstorm warnings	38	19	50%	18	89%	28 min
Flash flood warnings	10	8	20%	10	80%	128 min

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Tulsa, OK: tornado warnings	39	6	85%	16	44%	21 min
NWS Tulsa, OK: severe thunderstorm warnings	526	231	56%	457	86%	31 min
NWS Tulsa, OK: flash flood warnings	60	38	37%	132	83%	186 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 12, 6:43 PM CST	Wind Advisory	TSA	5 hr
Jan 14, 3:08 PM CST	Wind Chill Advisory	TSA	21 hr
Jan 21, 12:45 PM CST	Fire Weather Watch	TSA	16 hr
Jan 22, 4:24 AM CST	Red Flag Warning	TSA	16 hr
Jan 24, 4:03 PM CST	Winter Storm Watch	TSA	37 hr
Jan 26, 4:41 AM CST	Winter Storm Warning	TSA	40 hr
Jan 26, 10:54 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 26, 6:59 PM CST	Mesoscale Discussion	SPC	5 hr
Jan 27, 5:24 PM CST	Winter Weather Advisory	TSA	3 hr
Feb 6, 3:06 AM CST	Wind Advisory	TSA	15 hr
Feb 8, 2:29 PM CST	Wind Advisory	TSA	28 hr
Feb 9, 7:37 AM CST	Special Weather Statement	TSA	53 min
Feb 10, 2:42 PM CST	Tornado Watch	SPC	7 hr
Feb 10, 2:46 PM CST	Flood Watch	TSA	13 hr
Feb 10, 6:13 PM CST	Mesoscale Discussion	SPC	92 min
Feb 11, 6:24 AM CST	Wind Advisory	TSA	7 hr
Mar 4, 5:31 PM CST	Fire Weather Watch	TSA	16 hr
Mar 7, 10:21 AM CST	Wind Advisory	TSA	5 hr
Mar 9, 9:25 PM CDT	Mesoscale Discussion	SPC	65 min
Mar 15, 7:00 AM CDT	Dense Fog Advisory	TSA	3 hr
Mar 23, 5:14 AM CDT	Wind Advisory	TSA	17 hr
Mar 23, 11:09 PM CDT	Mesoscale Discussion	SPC	66 min
Mar 23, 11:35 PM CDT	Mesoscale Discussion	SPC	115 min
Mar 24, 1:11 AM CDT	Wind Advisory	TSA	7 hr
Mar 24, 2:28 AM CDT	Mesoscale Discussion	SPC	2 hr
Mar 24, 3:22 AM CDT	Mesoscale Discussion	SPC	83 min
Mar 24, 6:11 AM CDT	Severe Thunderstorm Warning	TSA	35 min
Mar 24, 9:17 AM CDT	Severe Thunderstorm Warning	TSA	43 min
Mar 24, 9:38 AM CDT	Mesoscale Discussion	SPC	97 min
Mar 24, 10:00 AM CDT	Special Weather Statement	TSA	15 min
Mar 25, 4:13 PM CDT	Special Weather Statement	TSA	62 min
Mar 26, 3:49 AM CDT	Winter Storm Watch	TSA	36 hr
Mar 26, 12:54 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 27, 3:50 PM CDT	Winter Weather Advisory	TSA	27 hr
Mar 28, 5:03 PM CDT	Freeze Warning	TSA	17 hr
Mar 29, 8:18 AM CDT	River Flood Warning	TSA	71 hr
Mar 30, 10:10 PM CDT	Mesoscale Discussion	SPC	95 min
Mar 31, 3:26 PM CDT	Freeze Warning	TSA	13 hr
Apr 1, 12:52 PM CDT	Red Flag Warning	TSA	6 hr
Apr 2, 3:42 PM CDT	Freeze Warning	TSA	17 hr
Apr 3, 3:02 PM CDT	Freeze Watch	TSA	48 hr
Apr 3, 3:02 PM CDT	Freeze Watch	TSA	48 hr
Apr 4, 10:16 AM CDT	Wind Advisory	TSA	9 hr
Apr 5, 4:30 AM CDT	Wind Advisory	TSA	15 hr
Apr 5, 3:03 PM CDT	Freeze Warning	TSA	18 hr
Apr 5, 3:03 PM CDT	Freeze Warning	TSA	42 hr
Apr 7, 3:32 PM CDT	Freeze Warning	TSA	13 hr
Apr 9, 12:57 PM CDT	Mesoscale Discussion	SPC	63 min
Apr 9, 1:44 PM CDT	Tornado Watch	SPC	7 hr
Apr 9, 2:59 PM CDT	Wind Advisory	TSA	7 hr
Apr 9, 5:31 PM CDT	Severe Thunderstorm Warning	TSA	59 min
Apr 9, 5:39 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 9, 5:44 PM CDT	Severe Thunderstorm Warning	TSA	43 min
Apr 9, 6:02 PM CDT	Tornado Warning	TSA	43 min
Apr 9, 6:31 PM CDT	Severe Thunderstorm Warning	TSA	19 min
Apr 9, 6:59 PM CDT	Mesoscale Discussion	SPC	91 min
Apr 10, 2:48 PM CDT	Frost Advisory	TSA	18 hr
Apr 13, 2:40 PM CDT	Frost Advisory	TSA	17 hr
Apr 18, 2:49 PM CDT	Mesoscale Discussion	SPC	86 min
Apr 18, 3:09 PM CDT	Severe Thunderstorm Warning	TSA	66 min
Apr 18, 4:21 PM CDT	Severe Thunderstorm Warning	TSA	54 min
Apr 18, 4:23 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Apr 18, 5:21 PM CDT	Areal Flood Advisory	TSA	54 min
Apr 18, 8:14 PM CDT	Mesoscale Discussion	SPC	91 min
Apr 18, 10:29 PM CDT	Special Weather Statement	TSA	61 min
Apr 19, 3:31 PM CDT	River Flood Warning	TSA	3 days
Apr 23, 2:32 AM CDT	Mesoscale Discussion	SPC	88 min
Apr 24, 8:51 AM CDT	Wind Advisory	TSA	11 hr
Apr 26, 3:40 AM CDT	Wind Advisory	TSA	15 hr
Apr 27, 12:26 AM CDT	Special Weather Statement	TSA	64 min
Apr 27, 1:25 AM CDT	Special Weather Statement	TSA	65 min
Apr 27, 11:05 AM CDT	River Flood Warning	TSA	8 days
Apr 27, 12:32 PM CDT	Mesoscale Discussion	SPC	88 min
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 29, 2:49 AM CDT	Flash Flood Watch	TSA	40 hr
May 1, 12:45 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 1, 2:05 AM CDT	Severe Thunderstorm Warning	TSA	55 min
May 1, 2:46 AM CDT	Flash Flood Warning	TSA	3 hr
May 1, 2:59 AM CDT	Severe Thunderstorm Warning	TSA	61 min
May 1, 3:00 AM CDT	Mesoscale Discussion	SPC	2 hr
May 1, 3:39 AM CDT	Flash Flood Watch	TSA	54 hr
May 1, 5:00 AM CDT	Flash Flood Warning	TSA	4 hr
May 1, 6:08 AM CDT	Mesoscale Discussion	SPC	67 min
May 1, 8:23 AM CDT	Flash Flood Warning	TSA	4 hr
May 1, 8:25 AM CDT	Special Weather Statement	TSA	35 min
May 1, 8:40 AM CDT	Severe Thunderstorm Warning	TSA	34 min
May 1, 12:08 PM CDT	Flash Flood Warning	TSA	4 hr
May 1, 3:10 PM CDT	Severe Thunderstorm Warning	TSA	36 min
May 1, 3:52 PM CDT	Flash Flood Warning	TSA	6 hr
May 1, 3:53 PM CDT	Severe Thunderstorm Warning	TSA	67 min
May 1, 4:58 PM CDT	Severe Thunderstorm Warning	TSA	47 min
May 1, 5:10 PM CDT	Severe Thunderstorm Warning	TSA	65 min
May 1, 5:14 PM CDT	Severe Thunderstorm Warning	TSA	16 min
May 1, 9:30 PM CDT	Areal Flood Warning	TSA	12 hr
May 7, 4:04 AM CDT	Flash Flood Watch	TSA	31 hr
May 7, 4:15 AM CDT	Dense Fog Advisory	TSA	8 hr
May 7, 2:39 PM CDT	River Flood Watch	TSA	17 hr
May 7, 2:39 PM CDT	River Flood Watch	TSA	24 hr
May 8, 4:31 AM CDT	Mesoscale Discussion	SPC	59 min
May 8, 4:55 AM CDT	Severe Thunderstorm Watch PDS	SPC	7 hr
May 8, 6:22 AM CDT	Severe Thunderstorm Warning	TSA	53 min
May 8, 6:59 AM CDT	Severe Thunderstorm Warning	TSA	61 min
May 8, 7:17 AM CDT	Mesoscale Discussion	SPC	58 min
May 8, 7:55 AM CDT	River Flood Warning	TSA	5 days
May 12, 2:31 PM CDT	Special Weather Statement	TSA	59 min
May 12, 2:54 PM CDT	Special Weather Statement	TSA	66 min
May 12, 3:37 PM CDT	Severe Thunderstorm Warning	TSA	48 min
May 13, 1:59 AM CDT	Wind Advisory	TSA	13 hr
May 13, 10:15 AM CDT	Flash Flood Watch	TSA	21 hr
May 13, 5:11 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 13, 8:22 PM CDT	Mesoscale Discussion	SPC	53 min
May 13, 9:09 PM CDT	Severe Thunderstorm Warning	TSA	81 min
May 13, 9:36 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 13, 9:45 PM CDT	Tornado Warning	TSA	45 min
May 13, 10:22 PM CDT	Severe Thunderstorm Warning	TSA	53 min
May 13, 11:27 PM CDT	Mesoscale Discussion	SPC	93 min
May 15, 12:19 PM CDT	Flash Flood Watch	TSA	11 hr
May 15, 7:11 PM CDT	Mesoscale Discussion	SPC	64 min
May 15, 7:48 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 15, 9:03 PM CDT	Severe Thunderstorm Warning	TSA	72 min
May 15, 10:05 PM CDT	Severe Thunderstorm Warning	TSA	70 min
May 15, 10:48 PM CDT	Severe Thunderstorm Warning	TSA	72 min
May 26, 3:12 AM CDT	Dense Fog Advisory	TSA	6 hr
May 29, 5:12 AM CDT	Dense Fog Advisory	TSA	4 hr
Jun 2, 8:50 PM CDT	Flash Flood Watch	TSA	4 hr
Jun 9, 2:34 PM CDT	Tornado Watch	SPC	7 hr
Jun 9, 6:22 PM CDT	Mesoscale Discussion	SPC	53 min
Jun 9, 8:54 PM CDT	Severe Thunderstorm Warning	TSA	66 min
Jun 9, 9:05 PM CDT	Severe Thunderstorm Warning	TSA	40 min
Jun 9, 9:15 PM CDT	Mesoscale Discussion	SPC	60 min
Jun 9, 9:25 PM CDT	Areal Flood Advisory	TSA	65 min
Jun 9, 9:45 PM CDT	Severe Thunderstorm Warning	TSA	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, 12:30 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 10, 3:46 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 10, 5:21 PM CDT	Special Weather Statement	TSA	24 min
Jun 10, 7:53 PM CDT	River Flood Warning	TSA	42 hr
Jun 11, 3:59 AM CDT	Dense Fog Advisory	TSA	4 hr
Jun 12, 6:23 AM CDT	Mesoscale Discussion	SPC	67 min
Jun 12, 7:46 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 13, 11:02 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 14, 10:54 PM CDT	Tornado Watch	SPC	5 hr
Jun 15, 2:31 AM CDT	Mesoscale Discussion	SPC	59 min
Jun 15, 11:59 AM CDT	Mesoscale Discussion	SPC	61 min
Jun 15, 6:50 PM CDT	Mesoscale Discussion	SPC	85 min
Jun 16, 2:30 AM CDT	Mesoscale Discussion	SPC	60 min
Jun 16, 6:09 AM CDT	Special Weather Statement	TSA	36 min
Jun 16, 2:07 PM CDT	River Flood Warning	TSA	4 days
Jun 16, 4:51 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 16, 8:26 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 16, 10:48 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 21, 9:12 PM CDT	Excessive Heat Watch	TSA	19 hr
Jun 21, 9:12 PM CDT	Heat Advisory	TSA	19 hr
Jun 22, 2:55 AM CDT	Excessive Heat Warning	TSA	6 days
Jun 24, 1:44 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 24, 4:25 PM CDT	Special Weather Statement	TSA	50 min
Jun 30, 7:57 AM CDT	Mesoscale Discussion	SPC	93 min
Jul 3, 1:37 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 10, 3:21 PM CDT	Excessive Heat Warning	TSA	6 days
Jul 13, 2:37 AM CDT	Special Weather Statement	TSA	38 min
Jul 13, 2:48 AM CDT	Severe Thunderstorm Warning	TSA	24 min
Jul 13, 5:42 AM CDT	Special Weather Statement	TSA	63 min
Jul 15, 9:45 PM CDT	Mesoscale Discussion	SPC	90 min
Jul 16, 1:58 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 16, 3:13 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 16, 3:47 PM CDT	Special Weather Statement	TSA	28 min
Jul 16, 6:56 PM CDT	Mesoscale Discussion	SPC	64 min
Jul 20, 8:26 PM CDT	Mesoscale Discussion	SPC	94 min
Jul 20, 8:43 PM CDT	Tornado Watch	SPC	7 hr
Jul 21, 1:34 AM CDT	Mesoscale Discussion	SPC	86 min
Jul 21, 9:24 PM CDT	River Flood Warning	TSA	12 hr
Jul 30, 7:09 AM CDT	Areal Flood Advisory	TSA	2 hr
Aug 3, 3:32 AM CDT	Excessive Heat Watch	TSA	12 hr
Aug 3, 3:31 PM CDT	Heat Advisory	TSA	4 days
Aug 4, 6:21 PM CDT	Mesoscale Discussion	SPC	114 min
Aug 4, 8:35 PM CDT	Mesoscale Discussion	SPC	85 min
Aug 10, 4:35 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 17, 11:07 AM CDT	Special Weather Statement	TSA	53 min
Aug 17, 11:55 AM CDT	Severe Thunderstorm Warning	TSA	35 min
Aug 18, 3:00 AM CDT	Special Weather Statement	TSA	30 min
Aug 19, 8:14 PM CDT	Mesoscale Discussion	SPC	61 min
Aug 19, 8:48 PM CDT	Tornado Watch	SPC	7 hr
Aug 19, 10:13 PM CDT	Severe Thunderstorm Warning	TSA	62 min
Aug 19, 10:35 PM CDT	Severe Thunderstorm Warning	TSA	40 min
Aug 20, 1:29 AM CDT	Severe Thunderstorm Warning	TSA	31 min
Aug 20, 1:47 AM CDT	Mesoscale Discussion	SPC	88 min
Aug 20, 1:58 AM CDT	Areal Flood Advisory	TSA	62 min
Aug 20, 1:59 AM CDT	Severe Thunderstorm Warning	TSA	46 min
Aug 20, 2:43 AM CDT	Severe Thunderstorm Warning	TSA	34 min
Aug 20, 8:48 AM CDT	River Flood Warning	TSA	50 hr
Aug 20, 8:48 AM CDT	River Flood Warning	TSA	14 hr
Sep 2, 6:57 AM CDT	Mesoscale Discussion	SPC	2 hr
Sep 6, 3:33 AM CDT	Dense Fog Advisory	TSA	7 hr
Sep 8, 4:06 PM CDT	Flash Flood Watch	TSA	21 hr
Sep 9, 6:49 AM CDT	Areal Flood Advisory	TSA	101 min
Sep 9, 8:25 AM CDT	River Flood Warning	TSA	6 days
Sep 9, 8:55 AM CDT	Flash Flood Warning	TSA	4 hr
Sep 9, 12:40 PM CDT	Areal Flood Warning	TSA	6 hr
Sep 9, 2:10 PM CDT	River Flood Warning	TSA	7 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, 2:48 PM CDT	Severe Thunderstorm Warning	TSA	57 min
Sep 21, 3:26 PM CDT	Flash Flood Warning	TSA	4 hr
Sep 21, 3:32 PM CDT	Severe Thunderstorm Warning	TSA	58 min
Sep 21, 3:38 PM CDT	Severe Thunderstorm Warning	TSA	67 min
Sep 21, 4:32 PM CDT	Severe Thunderstorm Warning	TSA	43 min
Sep 21, 4:35 PM CDT	Flash Flood Warning	TSA	4 hr
Sep 21, 7:59 PM CDT	River Flood Warning	TSA	61 hr
Sep 25, 2:38 AM CDT	Dense Fog Advisory	TSA	6 hr
Oct 1, 12:44 PM CDT	Mesoscale Discussion	SPC	91 min
Oct 1, 1:16 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Oct 1, 2:37 PM CDT	Severe Thunderstorm Warning	TSA	23 min
Oct 6, 3:15 AM CDT	Mesoscale Discussion	SPC	2 hr
Oct 6, 3:46 PM CDT	Flood Watch	TSA	67 hr
Oct 8, 9:17 AM CDT	River Flood Warning	TSA	5 days
Oct 8, 10:48 AM CDT	Mesoscale Discussion	SPC	3 hr
Oct 8, 11:33 AM CDT	Areal Flood Advisory	TSA	117 min
Oct 8, 12:43 PM CDT	Flash Flood Warning	TSA	6 hr
Oct 8, 2:04 PM CDT	River Flood Warning	TSA	4 days
Oct 8, 6:44 PM CDT	Flash Flood Warning	TSA	6 hr
Oct 9, 12:34 AM CDT	Areal Flood Warning	TSA	15 hr
Oct 9, 3:56 PM CDT	Areal Flood Warning	TSA	27 hr
Oct 10, 6:58 PM CDT	Areal Flood Warning	TSA	12 hr
Oct 17, 2:39 AM CDT	Freeze Warning	TSA	31 hr
Oct 23, 4:24 AM CDT	Frost Advisory	TSA	29 hr
Oct 29, 3:15 PM CDT	Special Weather Statement	TSA	30 min
Oct 30, 8:20 AM CDT	River Flood Warning	TSA	48 hr
Nov 4, 3:20 PM CST	Frost Advisory	TSA	17 hr
Nov 18, 3:50 PM CST	Freeze Warning	TSA	17 hr
Dec 7, 7:40 PM CST	Winter Weather Advisory	TSA	14 hr
Dec 8, 9:39 PM CST	Wind Advisory	TSA	6 hr
Dec 23, 4:04 AM CST	Winter Storm Watch	TSA	24 hr
Dec 23, 10:31 AM CST	Mesoscale Discussion	SPC	89 min
Dec 23, 3:55 PM CST	Winter Storm Warning	TSA	36 hr
Dec 24, 10:50 AM CST	Blizzard Warning	TSA	17 hr
Dec 24, 11:23 AM CST	Mesoscale Discussion	SPC	6 hr
Dec 25, 3:32 AM CST	Winter Weather Advisory	TSA	4 hr
Dec 28, 9:01 PM CST	Winter Weather Advisory	TSA	31 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	38
Tornado Warning	2
Severe Thunderstorm Watch	16
Tornado Watch	6
Mesoscale Discussion	57
Special Weather Statement	18
Flooding
Areal Flood Warning	5
Flash Flood Warning	10
River Flood Warning	15
Flash Flood Watch	7
Flood Watch	2
River Flood Watch	2
Areal Flood Advisory	6
Winter
Blizzard Warning	1
Winter Storm Warning	2
Winter Storm Watch	3
Winter Weather Advisory	5
Heat
Excessive Heat Warning	2
Excessive Heat Watch	2
Heat Advisory	2
Cold
Freeze Warning	8
Freeze Watch	2
Frost Advisory	4
Wind Chill Advisory	1
Wind and dust
Wind Advisory	14
Fire
Red Flag Warning	2
Fire Weather Watch	2
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.