Weather alerts in Tulsa County, Oklahoma, 2023

262 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Tulsa County and its neighbors

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts: 262
Warnings: 79
Watches: 24
Advisories: 66
Busiest month: June56 alerts
Busiest day: September 24, 202312 alerts

Over time

By month

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, 2:02 PM CST	Mesoscale Discussion	SPC	118 min
Jan 2, 3:34 PM CST	Tornado Watch	SPC	6 hr
Jan 11, 12:53 PM CST	Wind Advisory	TSA	18 hr
Jan 15, 3:57 AM CST	Wind Advisory	TSA	29 hr
Jan 23, 1:48 PM CST	Winter Storm Watch	TSA	14 hr
Jan 23, 1:48 PM CST	Winter Storm Warning	TSA	37 hr
Jan 23, 1:48 PM CST	Winter Weather Advisory	TSA	40 hr
Jan 29, 5:26 AM CST	Winter Weather Advisory	TSA	7 hr
Jan 29, 2:43 PM CST	Winter Weather Advisory	TSA	51 hr
Jan 30, 10:17 AM CST	Winter Storm Warning	TSA	28 hr
Jan 30, 10:17 AM CST	Winter Weather Advisory	TSA	40 hr
Feb 1, 2:31 AM CST	Winter Weather Advisory	TSA	33 hr
Feb 13, 2:07 AM CST	Wind Advisory	TSA	46 hr
Feb 21, 2:14 PM CST	Wind Advisory	TSA	28 hr
Feb 25, 2:24 PM CST	Wind Advisory	TSA	42 hr
Feb 26, 7:02 PM CST	Mesoscale Discussion	SPC	118 min
Feb 26, 7:32 PM CST	Tornado Watch	SPC	5 hr
Feb 26, 10:17 PM CST	Mesoscale Discussion	SPC	88 min
Feb 26, 10:27 PM CST	Severe Thunderstorm Warning Considerable damage threat	TSA	48 min
Feb 28, 1:10 PM CST	Red Flag Warning	TSA	7 hr
Mar 7, 9:36 PM CST	Areal Flood Advisory	TSA	3 hr
Mar 16, 12:27 PM CDT	Wind Advisory	TSA	15 hr
Mar 16, 1:14 PM CDT	Special Weather Statement	TSA	31 min
Mar 16, 1:33 PM CDT	Special Weather Statement	TSA	27 min
Mar 22, 1:58 PM CDT	Flood Watch	TSA	50 hr
Mar 23, 2:45 PM CDT	Mesoscale Discussion	SPC	90 min
Mar 23, 3:10 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Mar 23, 3:54 PM CDT	Areal Flood Advisory	TSA	3 hr
Mar 23, 5:23 PM CDT	Flash Flood Warning	TSA	4 hr
Mar 23, 9:21 PM CDT	Areal Flood Advisory	TSA	114 min
Mar 23, 10:41 PM CDT	Flash Flood Warning	TSA	4 hr
Mar 25, 4:34 AM CDT	Dense Fog Advisory	TSA	6 hr
Mar 29, 2:06 PM CDT	Fire Weather Watch	TSA	14 hr
Mar 30, 3:49 AM CDT	Wind Advisory	TSA	39 hr
Mar 30, 3:54 AM CDT	Red Flag Warning	TSA	40 hr
Mar 30, 3:02 PM CDT	Mesoscale Discussion	SPC	118 min
Mar 31, 1:18 PM CDT	High Wind Warning	TSA	6 hr
Apr 2, 2:10 PM CDT	Fire Weather Watch	TSA	37 hr
Apr 3, 2:22 PM CDT	Wind Advisory	TSA	35 hr
Apr 4, 3:06 PM CDT	Mesoscale Discussion	SPC	114 min
Apr 4, 8:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 4, 8:43 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 5, 2:27 AM CDT	Severe Thunderstorm Watch	SPC	10 hr
Apr 19, 3:17 AM CDT	Wind Advisory	TSA	28 hr
Apr 19, 6:31 PM CDT	Mesoscale Discussion	SPC	59 min
Apr 19, 6:40 PM CDT	Tornado Watch	SPC	5 hr
Apr 20, 12:37 AM CDT	Special Weather Statement	TSA	23 min
Apr 27, 7:13 AM CDT	Areal Flood Advisory	TSA	3 hr
May 9, 7:46 PM CDT	Special Weather Statement	TSA	29 min
May 9, 8:12 PM CDT	Special Weather Statement	TSA	33 min
May 9, 8:38 PM CDT	Special Weather Statement	TSA	37 min
May 12, 3:39 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
May 13, 12:18 AM CDT	Special Weather Statement	TSA	42 min
May 13, 12:59 AM CDT	Special Weather Statement	TSA	46 min
May 13, 5:55 PM CDT	Special Weather Statement	TSA	35 min
May 13, 6:32 PM CDT	Special Weather Statement	TSA	43 min
May 14, 2:51 PM CDT	Special Weather Statement	TSA	39 min
May 19, 7:12 AM CDT	Areal Flood Advisory	TSA	3 hr
May 25, 6:40 PM CDT	Special Weather Statement	TSA	35 min
Jun 3, 4:43 PM CDT	Special Weather Statement	TSA	32 min
Jun 3, 5:10 PM CDT	Areal Flood Advisory	TSA	3 hr
Jun 3, 5:17 PM CDT	Special Weather Statement	TSA	28 min
Jun 3, 5:31 PM CDT	Severe Thunderstorm Warning	TSA	21 min
Jun 3, 5:53 PM CDT	Special Weather Statement	TSA	37 min
Jun 6, 5:07 PM CDT	Special Weather Statement	TSA	23 min
Jun 6, 6:00 PM CDT	Special Weather Statement	TSA	30 min
Jun 6, 6:10 PM CDT	Severe Thunderstorm Warning	TSA	35 min
Jun 6, 6:24 PM CDT	Severe Thunderstorm Warning	TSA	51 min
Jun 6, 6:40 PM CDT	Special Weather Statement	TSA	35 min
Jun 6, 7:11 PM CDT	Special Weather Statement	TSA	34 min
Jun 6, 7:18 PM CDT	Severe Thunderstorm Warning	TSA	30 min
Jun 6, 7:21 PM CDT	Areal Flood Advisory	TSA	78 min
Jun 6, 7:30 PM CDT	Severe Thunderstorm Warning	TSA	19 min
Jun 6, 7:50 PM CDT	Special Weather Statement	TSA	25 min
Jun 8, 6:08 PM CDT	Special Weather Statement	TSA	37 min
Jun 9, 8:31 PM CDT	Special Weather Statement	TSA	29 min
Jun 9, 8:58 PM CDT	Special Weather Statement	TSA	32 min
Jun 9, 9:32 PM CDT	Special Weather Statement	TSA	28 min
Jun 10, 4:48 AM CDT	Severe Thunderstorm Warning	TSA	42 min
Jun 10, 4:55 AM CDT	Special Weather Statement	TSA	50 min
Jun 10, 5:30 AM CDT	Special Weather Statement	TSA	45 min
Jun 11, 4:20 AM CDT	Special Weather Statement	TSA	25 min
Jun 14, 2:02 AM CDT	Special Weather Statement	TSA	28 min
Jun 14, 2:05 AM CDT	Special Weather Statement	TSA	25 min
Jun 14, 2:13 AM CDT	Severe Thunderstorm Warning	TSA	27 min
Jun 14, 2:23 AM CDT	Severe Thunderstorm Warning	TSA	27 min
Jun 14, 6:27 AM CDT	Severe Thunderstorm Warning	TSA	63 min
Jun 14, 7:06 AM CDT	Severe Thunderstorm Warning	TSA	39 min
Jun 15, 8:44 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 15, 11:21 PM CDT	Special Weather Statement	TSA	39 min
Jun 17, 8:21 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 17, 10:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 17, 11:39 PM CDT	Severe Thunderstorm Warning Destructive damage threat	TSA	66 min
Jun 18, 12:01 AM CDT	Mesoscale Discussion	SPC	59 min
Jun 18, 12:07 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	53 min
Jun 18, 12:12 AM CDT	Severe Thunderstorm Warning Destructive damage threat	TSA	63 min
Jun 18, 1:29 PM CDT	Heat Advisory	TSA	32 hr
Jun 19, 2:00 PM CDT	Heat Advisory	TSA	31 hr
Jun 20, 2:22 PM CDT	Heat Advisory	TSA	23 hr
Jun 21, 1:22 PM CDT	Heat Advisory	TSA	32 hr
Jun 22, 1:45 PM CDT	Heat Advisory	TSA	31 hr
Jun 23, 2:59 PM CDT	Heat Advisory	TSA	30 hr
Jun 24, 10:54 AM CDT	Special Weather Statement	TSA	36 min
Jun 26, 2:55 PM CDT	Heat Advisory	TSA	29 hr
Jun 27, 8:53 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 27, 9:17 AM CDT	Severe Thunderstorm Warning	TSA	43 min
Jun 27, 2:58 PM CDT	Heat Advisory	TSA	30 hr
Jun 27, 10:35 PM CDT	Mesoscale Discussion	SPC	85 min
Jun 27, 11:09 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 28, 1:12 AM CDT	Mesoscale Discussion	SPC	93 min
Jun 28, 1:40 AM CDT	Special Weather Statement	TSA	50 min
Jun 28, 3:20 AM CDT	Heat Advisory	TSA	42 hr
Jun 28, 12:45 PM CDT	Excessive Heat Warning	TSA	8 hr
Jun 29, 2:55 AM CDT	Excessive Heat Warning	TSA	18 hr
Jun 29, 2:04 PM CDT	Heat Advisory	TSA	31 hr
Jul 3, 12:53 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 3, 2:41 PM CDT	Special Weather Statement	TSA	34 min
Jul 3, 2:43 PM CDT	Areal Flood Advisory	TSA	2 hr
Jul 5, 3:29 AM CDT	Special Weather Statement	TSA	61 min
Jul 5, 5:09 AM CDT	Special Weather Statement	TSA	66 min
Jul 8, 2:15 AM CDT	Special Weather Statement	TSA	30 min
Jul 8, 2:25 AM CDT	Severe Thunderstorm Warning	TSA	35 min
Jul 11, 1:57 PM CDT	Excessive Heat Warning	TSA	30 hr
Jul 12, 1:59 PM CDT	Excessive Heat Warning	TSA	30 hr
Jul 12, 8:04 PM CDT	Excessive Heat Warning	TSA	116 min
Jul 12, 11:02 PM CDT	Mesoscale Discussion	SPC	118 min
Jul 13, 1:56 PM CDT	Heat Advisory	TSA	30 hr
Jul 13, 9:33 PM CDT	Flood Watch	TSA	12 hr
Jul 14, 12:00 AM CDT	Special Weather Statement	TSA	30 min
Jul 14, 12:07 AM CDT	Severe Thunderstorm Warning	TSA	31 min
Jul 14, 1:49 AM CDT	Areal Flood Advisory	TSA	116 min
Jul 14, 7:21 AM CDT	Special Weather Statement	TSA	39 min
Jul 14, 7:27 AM CDT	Severe Thunderstorm Warning	TSA	48 min
Jul 14, 3:52 PM CDT	Mesoscale Discussion	SPC	83 min
Jul 14, 4:58 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 14, 6:48 PM CDT	Mesoscale Discussion	SPC	87 min
Jul 14, 7:23 PM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	52 min
Jul 14, 7:30 PM CDT	Severe Thunderstorm Warning	TSA	45 min
Jul 14, 8:00 PM CDT	Areal Flood Advisory	TSA	3 hr
Jul 14, 8:00 PM CDT	Severe Thunderstorm Warning	TSA	45 min
Jul 16, 2:04 PM CDT	Heat Advisory	TSA	31 hr
Jul 17, 3:41 AM CDT	Heat Advisory	TSA	41 hr
Jul 17, 10:33 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 17, 11:54 AM CDT	Mesoscale Discussion	SPC	96 min
Jul 17, 12:48 PM CDT	Special Weather Statement	TSA	42 min
Jul 17, 2:35 PM CDT	Mesoscale Discussion	SPC	85 min
Jul 17, 2:44 PM CDT	Excessive Heat Warning	TSA	30 hr
Jul 18, 3:00 AM CDT	Heat Advisory	TSA	42 hr
Jul 19, 3:02 AM CDT	Excessive Heat Warning	TSA	18 hr
Jul 20, 8:48 AM CDT	Heat Advisory	TSA	12 hr
Jul 21, 4:19 AM CDT	Mesoscale Discussion	SPC	86 min
Jul 21, 4:44 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 21, 5:09 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	51 min
Jul 21, 5:44 AM CDT	Severe Thunderstorm Warning	TSA	46 min
Jul 21, 5:52 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	40 min
Jul 24, 2:01 PM CDT	Heat Advisory	TSA	31 hr
Jul 25, 1:52 PM CDT	Heat Advisory	TSA	30 hr
Jul 26, 2:36 PM CDT	Heat Advisory	TSA	29 hr
Jul 27, 1:58 PM CDT	Heat Advisory	TSA	29 hr
Jul 28, 2:51 AM CDT	Heat Advisory	TSA	42 hr
Jul 29, 2:20 AM CDT	Heat Advisory	TSA	43 hr
Jul 30, 2:21 AM CDT	Heat Advisory	TSA	43 hr
Jul 31, 2:21 AM CDT	Heat Advisory	TSA	43 hr
Jul 31, 1:45 PM CDT	Excessive Heat Warning	TSA	31 hr
Aug 1, 2:24 AM CDT	Excessive Heat Warning	TSA	42 hr
Aug 2, 2:15 AM CDT	Heat Advisory	TSA	43 hr
Aug 2, 3:24 PM CDT	Excessive Heat Warning	TSA	30 hr
Aug 3, 2:39 AM CDT	Heat Advisory	TSA	42 hr
Aug 3, 12:57 PM CDT	Excessive Heat Warning	TSA	32 hr
Aug 4, 3:08 AM CDT	Heat Advisory	TSA	31 hr
Aug 5, 4:11 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 5, 7:15 AM CDT	Special Weather Statement	TSA	45 min
Aug 5, 7:39 AM CDT	Severe Thunderstorm Warning	TSA	37 min
Aug 5, 7:43 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 6, 1:05 AM CDT	Mesoscale Discussion	SPC	115 min
Aug 6, 1:25 AM CDT	Special Weather Statement	TSA	50 min
Aug 6, 2:42 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 7, 2:44 AM CDT	Severe Thunderstorm Warning	TSA	46 min
Aug 7, 2:48 AM CDT	Severe Thunderstorm Warning	TSA	42 min
Aug 7, 3:09 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 7, 3:50 AM CDT	Special Weather Statement	TSA	40 min
Aug 8, 1:07 AM CDT	Mesoscale Discussion	SPC	113 min
Aug 9, 3:21 PM CDT	Mesoscale Discussion	SPC	114 min
Aug 10, 1:56 PM CDT	Heat Advisory	TSA	30 hr
Aug 11, 3:32 AM CDT	Excessive Heat Warning	TSA	16 hr
Aug 11, 2:35 PM CDT	Excessive Heat Warning	TSA	29 hr
Aug 11, 2:35 PM CDT	Heat Advisory	TSA	29 hr
Aug 12, 1:30 PM CDT	Excessive Heat Warning	TSA	30 hr
Aug 12, 1:30 PM CDT	Heat Advisory	TSA	30 hr
Aug 13, 9:16 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 13, 10:39 PM CDT	Special Weather Statement	TSA	36 min
Aug 13, 10:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 13, 11:04 PM CDT	Areal Flood Advisory	TSA	116 min
Aug 13, 11:16 PM CDT	Severe Thunderstorm Warning	TSA	44 min
Aug 13, 11:19 PM CDT	Flash Flood Warning	TSA	5 hr
Aug 13, 11:45 PM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	45 min
Aug 14, 12:04 AM CDT	Severe Thunderstorm Warning	TSA	41 min
Aug 14, 12:19 AM CDT	Severe Thunderstorm Warning Destructive damage threat	TSA	41 min
Aug 14, 12:27 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	48 min
Aug 14, 12:50 AM CDT	Severe Thunderstorm Warning Considerable damage threat	TSA	29 min
Aug 17, 2:02 PM CDT	Heat Advisory	TSA	30 hr
Aug 18, 1:50 PM CDT	Excessive Heat Warning	TSA	30 hr
Aug 19, 2:03 AM CDT	Excessive Heat Warning	TSA	43 hr
Aug 20, 2:14 AM CDT	Excessive Heat Warning	TSA	43 hr
Aug 21, 2:23 AM CDT	Excessive Heat Warning	TSA	42 hr
Aug 21, 12:50 PM CDT	Excessive Heat Warning	TSA	55 hr
Aug 23, 1:53 AM CDT	Excessive Heat Warning	TSA	42 hr
Aug 24, 1:58 AM CDT	Heat Advisory	TSA	42 hr
Aug 24, 2:00 PM CDT	Excessive Heat Warning	TSA	30 hr
Aug 25, 1:22 PM CDT	Heat Advisory	TSA	31 hr
Aug 25, 3:28 PM CDT	Special Weather Statement	TSA	32 min
Aug 25, 3:57 PM CDT	Special Weather Statement	TSA	33 min
Aug 25, 4:44 PM CDT	Special Weather Statement	TSA	31 min
Sep 5, 3:16 AM CDT	Heat Advisory	TSA	16 hr
Sep 5, 4:04 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 5, 4:58 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 5, 5:47 PM CDT	Mesoscale Discussion	SPC	118 min
Sep 5, 7:14 PM CDT	Severe Thunderstorm Warning	TSA	31 min
Sep 5, 7:37 PM CDT	Special Weather Statement	TSA	23 min
Sep 5, 8:01 PM CDT	Severe Thunderstorm Warning	TSA	17 min
Sep 19, 1:18 PM CDT	Flood Watch	TSA	21 hr
Sep 19, 8:27 PM CDT	Mesoscale Discussion	SPC	93 min
Sep 19, 11:11 PM CDT	Special Weather Statement	TSA	34 min
Sep 19, 11:42 PM CDT	Special Weather Statement	TSA	33 min
Sep 22, 3:47 AM CDT	Special Weather Statement	TSA	28 min
Sep 22, 3:49 AM CDT	Special Weather Statement	TSA	26 min
Sep 22, 4:14 AM CDT	Special Weather Statement	TSA	46 min
Sep 23, 3:17 AM CDT	Flood Watch	TSA	27 hr
Sep 23, 2:33 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 23, 4:03 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
Sep 23, 6:10 PM CDT	Severe Thunderstorm Warning	TSA	38 min
Sep 23, 6:38 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 23, 6:43 PM CDT	Special Weather Statement	TSA	32 min
Sep 23, 6:56 PM CDT	Severe Thunderstorm Warning	TSA	49 min
Sep 23, 6:59 PM CDT	Severe Thunderstorm Warning	TSA	33 min
Sep 23, 7:12 PM CDT	Severe Thunderstorm Warning	TSA	36 min
Sep 23, 7:26 PM CDT	Severe Thunderstorm Warning	TSA	33 min
Sep 23, 7:32 PM CDT	Special Weather Statement	TSA	28 min
Sep 23, 7:54 PM CDT	Areal Flood Advisory	TSA	2 hr
Sep 23, 8:03 PM CDT	Severe Thunderstorm Warning	TSA	42 min
Sep 23, 8:49 PM CDT	Special Weather Statement	TSA	26 min
Sep 23, 8:50 PM CDT	Flash Flood Warning	TSA	5 hr
Sep 23, 9:32 PM CDT	Special Weather Statement	TSA	28 min
Sep 23, 9:44 PM CDT	Mesoscale Discussion	SPC	91 min
Sep 23, 10:02 PM CDT	Areal Flood Advisory	TSA	3 hr
Sep 23, 11:07 PM CDT	Areal Flood Advisory	TSA	113 min
Sep 24, 3:35 PM CDT	Special Weather Statement	TSA	25 min
Oct 4, 5:18 PM CDT	Special Weather Statement	TSA	27 min
Oct 4, 5:34 PM CDT	Severe Thunderstorm Warning	TSA	41 min
Oct 4, 5:51 PM CDT	Severe Thunderstorm Warning	TSA	39 min
Oct 4, 6:20 PM CDT	Special Weather Statement	TSA	55 min
Oct 4, 6:35 PM CDT	Severe Thunderstorm Warning	TSA	40 min
Oct 4, 6:44 PM CDT	Special Weather Statement	TSA	16 min
Oct 4, 7:06 PM CDT	Severe Thunderstorm Warning	TSA	39 min
Oct 4, 7:09 PM CDT	Severe Thunderstorm Warning	TSA	51 min
Oct 4, 7:16 PM CDT	Areal Flood Advisory	TSA	3 hr
Oct 4, 7:22 PM CDT	Severe Thunderstorm Warning Destructive damage threat	TSA	38 min
Oct 28, 4:39 PM CDT	Freeze Warning	TSA	40 hr
Oct 30, 3:31 AM CDT	Freeze Warning	TSA	29 hr
Dec 3, 3:41 AM CST	Dense Fog Advisory	TSA	6 hr
Dec 7, 1:52 AM CST	Wind Advisory	TSA	16 hr
Dec 22, 4:19 PM CST	Dense Fog Advisory	TSA	18 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	47
Severe Thunderstorm Watch	14
Tornado Watch	3
Mesoscale Discussion	33
Special Weather Statement	60
Flooding
Flash Flood Warning	4
Flood Watch	4
Areal Flood Advisory	15
Winter
Winter Storm Warning	2
Winter Storm Watch	1
Winter Weather Advisory	5
Heat
Excessive Heat Warning	21
Heat Advisory	33
Cold
Freeze Warning	2
Wind and dust
High Wind Warning	1
Wind Advisory	10
Fire
Red Flag Warning	2
Fire Weather Watch	2
Fog and smoke
Dense Fog Advisory	3

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2022 2024

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. Rebuilt daily.