Alert archive / Colorado / Baca County
Weather alerts in Baca County, Colorado, 2021
255 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Baca County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 255
- Warnings
- 101
- Watches
- 38
- Advisories
- 9
- Busiest month
- May70 alerts
- Busiest day
- May 30, 202113 alerts
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 8, 2:56 PM MST | Winter Weather Advisory | PUB | 41 hr |
| Jan 14, 2:45 PM MST | Red Flag Warning | PUB | 26 hr |
| Jan 14, 2:49 PM MST | High Wind Warning | PUB | 24 hr |
| Jan 15, 9:50 AM MST | Dust Storm Warning | PUB | 85 min |
| Jan 15, 11:09 AM MST | Dust Storm Warning | PUB | 2 hr |
| Jan 15, 1:01 PM MST | Dust Storm Warning | PUB | 119 min |
| Jan 25, 3:03 PM MST | Winter Weather Advisory | PUB | 29 hr |
| Jan 30, 3:48 AM MST | High Wind Warning | PUB | 11 hr |
| Feb 7, 9:08 PM MST | Dense Fog Advisory | PUB | 11 hr |
| Feb 8, 9:08 PM MST | Freezing Fog Advisory | PUB | 10 hr |
| Feb 9, 9:33 PM MST | Freezing Fog Advisory | PUB | 10 hr |
| Feb 12, 4:01 AM MST | Winter Storm Watch | PUB | 24 hr |
| Feb 12, 12:43 PM MST | Wind Chill Advisory | PUB | 4 days |
| Feb 12, 3:14 PM MST | Winter Storm Warning | PUB | 48 hr |
| Feb 12, 3:14 PM MST | Winter Weather Advisory | PUB | 48 hr |
| Feb 14, 4:02 AM MST | Wind Chill Warning | PUB | 31 hr |
| Feb 26, 2:45 PM MST | Red Flag Warning | PUB | 26 hr |
| Mar 7, 3:50 AM MST | Fire Weather Watch | PUB | 11 hr |
| Mar 7, 2:54 PM MST | Fire Weather Watch | PUB | 24 hr |
| Mar 7, 2:54 PM MST | Red Flag Warning | PUB | 27 hr |
| Mar 8, 2:55 PM MST | Fire Weather Watch | PUB | 25 hr |
| Mar 8, 2:55 PM MST | Red Flag Warning | PUB | 27 hr |
| Mar 9, 3:28 PM MST | Red Flag Warning | PUB | 27 hr |
| Mar 10, 9:36 AM MST | High Wind Warning | PUB | 7 hr |
| Mar 15, 3:56 AM MDT | Winter Storm Watch | PUB | 31 hr |
| Mar 16, 10:38 AM MDT | Blizzard Warning | PUB | 21 hr |
| Mar 17, 3:38 AM MDT | Mesoscale Discussion | SPC | 6 hr |
| Mar 27, 2:51 PM MDT | Fire Weather Watch | PUB | 20 hr |
| Mar 28, 10:47 AM MDT | Red Flag Warning | PUB | 33 hr |
| Mar 31, 5:36 PM MDT | Red Flag Warning | PUB | 25 hr |
| Apr 4, 12:15 PM MDT | Red Flag Warning | PUB | 7 hr |
| Apr 4, 2:27 PM MDT | Special Weather Statement | PUB | 48 min |
| Apr 4, 3:15 PM MDT | Fire Weather Watch | PUB | 23 hr |
| Apr 4, 3:20 PM MDT | Special Weather Statement | PUB | 40 min |
| Apr 5, 2:42 PM MDT | Red Flag Warning | PUB | 29 hr |
| Apr 6, 9:18 AM MDT | High Wind Warning | PUB | 14 hr |
| Apr 6, 8:41 PM MDT | Dust Storm Warning | PUB | 94 min |
| Apr 7, 3:49 AM MDT | High Wind Warning | PUB | 14 hr |
| Apr 7, 2:55 PM MDT | Red Flag Warning | PUB | 29 hr |
| Apr 22, 4:19 AM MDT | Red Flag Warning | PUB | 16 hr |
| Apr 23, 2:58 PM MDT | Fire Weather Watch | PUB | 24 hr |
| Apr 23, 2:58 PM MDT | Fire Weather Watch | PUB | 37 hr |
| Apr 23, 3:53 PM MDT | Special Weather Statement | PUB | 52 min |
| Apr 24, 3:05 PM MDT | Red Flag Warning | PUB | 29 hr |
| Apr 25, 3:50 AM MDT | Red Flag Warning | PUB | 40 hr |
| Apr 26, 4:16 AM MDT | Fire Weather Watch | PUB | 11 hr |
| Apr 26, 2:55 PM MDT | Red Flag Warning | PUB | 29 hr |
| Apr 27, 3:26 PM MDT | High Wind Warning | PUB | 3 hr |
| Apr 29, 2:56 PM MDT | Fire Weather Watch | PUB | 24 hr |
| Apr 30, 2:48 PM MDT | Red Flag Warning | PUB | 29 hr |
| May 2, 4:02 PM MDT | Special Weather Statement | PUB | 28 min |
| May 2, 4:12 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 2, 4:32 PM MDT | Special Weather Statement | PUB | 28 min |
| May 2, 4:51 PM MDT | Severe Thunderstorm Warning | PUB | 39 min |
| May 2, 5:27 PM MDT | Severe Thunderstorm Warning | PUB | 48 min |
| May 2, 6:11 PM MDT | Severe Thunderstorm Warning | PUB | 23 min |
| May 7, 12:54 PM MDT | Special Weather Statement | PUB | 36 min |
| May 8, 6:23 PM MDT | Special Weather Statement | PUB | 37 min |
| May 8, 6:35 PM MDT | Severe Thunderstorm Warning | PUB | 55 min |
| May 8, 7:03 PM MDT | Severe Thunderstorm Warning | PUB | 72 min |
| May 8, 8:14 PM MDT | Severe Thunderstorm Warning | PUB | 61 min |
| May 14, 3:46 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 14, 3:59 PM MDT | Special Weather Statement | PUB | 31 min |
| May 14, 4:32 PM MDT | Special Weather Statement | PUB | 43 min |
| May 14, 4:46 PM MDT | Severe Thunderstorm Warning | PUB | 59 min |
| May 14, 4:47 PM MDT | Severe Thunderstorm Warning | PUB | 58 min |
| May 15, 1:57 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 4:06 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 15, 4:55 PM MDT | Special Weather Statement | PUB | 35 min |
| May 15, 5:07 PM MDT | Tornado Watch | SPC | 5 hr |
| May 15, 5:13 PM MDT | Special Weather Statement | PUB | 32 min |
| May 15, 5:22 PM MDT | Severe Thunderstorm Warning | PUB | 38 min |
| May 15, 5:35 PM MDT | Special Weather Statement | PUB | 40 min |
| May 15, 6:04 PM MDT | Special Weather Statement | PUB | 41 min |
| May 15, 6:22 PM MDT | Severe Thunderstorm Warning | PUB | 23 min |
| May 15, 6:49 PM MDT | Special Weather Statement | PUB | 41 min |
| May 15, 6:58 PM MDT | Severe Thunderstorm Warning | PUB | 32 min |
| May 15, 7:33 PM MDT | Special Weather Statement | PUB | 57 min |
| May 16, 1:23 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 1:49 PM MDT | Special Weather Statement | PUB | 26 min |
| May 16, 2:14 PM MDT | Special Weather Statement | PUB | 31 min |
| May 16, 2:36 PM MDT | Severe Thunderstorm Warning | PUB | 34 min |
| May 16, 2:43 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 16, 7:27 PM MDT | Special Weather Statement | PUB | 48 min |
| May 17, 12:39 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 17, 1:39 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 17, 4:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 17, 6:23 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 17, 6:29 PM MDT | Special Weather Statement | PUB | 61 min |
| May 17, 6:53 PM MDT | Special Weather Statement | PUB | 37 min |
| May 17, 7:06 PM MDT | Severe Thunderstorm Warning | PUB | 69 min |
| May 17, 8:28 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 18, 12:29 PM MDT | Special Weather Statement | PUB | 31 min |
| May 18, 12:46 PM MDT | Special Weather Statement | PUB | 29 min |
| May 18, 1:41 PM MDT | Special Weather Statement | PUB | 49 min |
| May 21, 4:29 PM MDT | Special Weather Statement | PUB | 31 min |
| May 21, 5:04 PM MDT | Severe Thunderstorm Warning | PUB | 26 min |
| May 21, 6:42 PM MDT | Severe Thunderstorm Warning | PUB | 33 min |
| May 23, 2:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| May 23, 4:07 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 23, 6:32 PM MDT | Mesoscale Discussion | SPC | 118 min |
| May 23, 10:23 PM MDT | Special Weather Statement | PUB | 52 min |
| May 29, 12:58 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 29, 1:48 PM MDT | Tornado Watch | SPC | 7 hr |
| May 29, 5:24 PM MDT | Severe Thunderstorm Warning | PUB | 36 min |
| May 29, 5:30 PM MDT | Mesoscale Discussion | SPC | 90 min |
| May 29, 5:53 PM MDT | Severe Thunderstorm Warning | PUB | 52 min |
| May 29, 6:11 PM MDT | Tornado Warning | PUB | 34 min |
| May 29, 6:38 PM MDT | Tornado Warning | PUB | 22 min |
| May 29, 6:54 PM MDT | Tornado Warning | PUB | 36 min |
| May 29, 7:24 PM MDT | Severe Thunderstorm Warning | PUB | 36 min |
| May 29, 8:02 PM MDT | Special Weather Statement | PUB | 43 min |
| May 29, 9:38 PM MDT | Special Weather Statement | PUB | 37 min |
| May 29, 10:37 PM MDT | Mesoscale Discussion | SPC | 53 min |
| May 30, 3:31 AM MDT | Flash Flood Watch | PUB | 20 hr |
| May 30, 11:41 AM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 30, 2:23 PM MDT | Severe Thunderstorm Warning | PUB | 37 min |
| May 30, 2:54 PM MDT | Tornado Warning | PUB | 36 min |
| May 30, 3:25 PM MDT | Tornado Warning | PUB | 35 min |
| May 30, 3:57 PM MDT | Tornado Warning | PUB | 21 min |
| Jun 1, 1:14 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 1, 7:56 PM MDT | Special Weather Statement | PUB | 34 min |
| Jun 1, 8:03 PM MDT | Special Weather Statement | PUB | 27 min |
| Jun 1, 8:15 PM MDT | Severe Thunderstorm Warning | PUB | 15 min |
| Jun 1, 8:29 PM MDT | Special Weather Statement | PUB | 46 min |
| Jun 6, 8:42 PM MDT | Special Weather Statement | PUB | 48 min |
| Jun 12, 2:46 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 12, 7:41 PM MDT | Special Weather Statement | PUB | 49 min |
| Jun 12, 7:55 PM MDT | Severe Thunderstorm Warning | PUB | 35 min |
| Jun 12, 7:58 PM MDT | Severe Thunderstorm Warning | PUB | 32 min |
| Jun 12, 8:26 PM MDT | Severe Thunderstorm Warning | PUB | 49 min |
| Jun 18, 4:47 PM MDT | Special Weather Statement | PUB | 43 min |
| Jun 18, 5:32 PM MDT | Special Weather Statement | PUB | 43 min |
| Jun 18, 6:22 PM MDT | Special Weather Statement | PUB | 23 min |
| Jun 18, 7:06 PM MDT | Special Weather Statement | PUB | 24 min |
| Jun 18, 7:33 PM MDT | Special Weather Statement | PUB | 27 min |
| Jun 19, 1:44 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 19, 6:16 PM MDT | Severe Thunderstorm Warning | PUB | 74 min |
| Jun 19, 7:16 PM MDT | Severe Thunderstorm Warning | PUB | 74 min |
| Jun 19, 7:23 PM MDT | Severe Thunderstorm Warning | PUB | 67 min |
| Jun 20, 5:26 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jun 22, 6:43 PM MDT | Special Weather Statement | PUB | 32 min |
| Jun 24, 4:53 PM MDT | Special Weather Statement | PUB | 52 min |
| Jun 24, 6:24 PM MDT | Severe Thunderstorm Warning | PUB | 66 min |
| Jun 25, 1:11 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 1:18 PM MDT | Severe Thunderstorm Warning | PUB | 72 min |
| Jun 25, 1:30 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 25, 2:01 PM MDT | Severe Thunderstorm Warning | PUB | 74 min |
| Jun 25, 2:17 PM MDT | Special Weather Statement | PUB | 43 min |
| Jun 25, 2:59 PM MDT | Severe Thunderstorm Warning | PUB | 61 min |
| Jul 3, 10:46 PM MDT | Severe Thunderstorm Warning | PUB | 29 min |
| Jul 3, 11:13 PM MDT | Special Weather Statement | PUB | 47 min |
| Jul 3, 11:56 PM MDT | Special Weather Statement | PUB | 34 min |
| Jul 4, 12:34 AM MDT | Special Weather Statement | PUB | 41 min |
| Jul 4, 2:37 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 4, 5:31 PM MDT | Severe Thunderstorm Warning | PUB | 29 min |
| Jul 4, 5:57 PM MDT | Severe Thunderstorm Warning | PUB | 48 min |
| Jul 4, 6:26 PM MDT | Severe Thunderstorm Warning | PUB | 42 min |
| Jul 4, 7:19 PM MDT | Special Weather Statement | PUB | 41 min |
| Jul 4, 7:30 PM MDT | Severe Thunderstorm Warning | PUB | 17 min |
| Jul 4, 7:56 PM MDT | Severe Thunderstorm Warning | PUB | 21 min |
| Jul 4, 8:09 PM MDT | Severe Thunderstorm Warning | PUB | 51 min |
| Jul 4, 8:20 PM MDT | Severe Thunderstorm Warning | PUB | 25 min |
| Jul 4, 8:42 PM MDT | Severe Thunderstorm Warning | PUB | 33 min |
| Jul 4, 8:44 PM MDT | Severe Thunderstorm Warning | PUB | 31 min |
| Jul 4, 9:10 PM MDT | Severe Thunderstorm Warning | PUB | 35 min |
| Jul 6, 1:21 PM MDT | Special Weather Statement | PUB | 24 min |
| Jul 6, 2:09 PM MDT | Severe Thunderstorm Warning | PUB | 36 min |
| Jul 6, 2:42 PM MDT | Severe Thunderstorm Warning | PUB | 33 min |
| Jul 6, 3:15 PM MDT | Special Weather Statement | PUB | 45 min |
| Jul 6, 4:05 PM MDT | Special Weather Statement | PUB | 40 min |
| Jul 9, 2:41 PM MDT | Special Weather Statement | PUB | 49 min |
| Jul 9, 10:31 PM MDT | Special Weather Statement | PUB | 44 min |
| Jul 14, 7:55 PM MDT | Special Weather Statement | PUB | 35 min |
| Jul 14, 8:53 PM MDT | Special Weather Statement | PUB | 37 min |
| Jul 15, 7:30 PM MDT | Special Weather Statement | PUB | 45 min |
| Jul 16, 6:25 PM MDT | Special Weather Statement | PUB | 35 min |
| Jul 17, 3:59 PM MDT | Special Weather Statement | PUB | 31 min |
| Jul 17, 4:30 PM MDT | Special Weather Statement | PUB | 30 min |
| Jul 17, 5:00 PM MDT | Special Weather Statement | PUB | 30 min |
| Jul 17, 5:29 PM MDT | Special Weather Statement | PUB | 31 min |
| Jul 17, 5:37 PM MDT | Severe Thunderstorm Warning | PUB | 23 min |
| Jul 17, 5:58 PM MDT | Special Weather Statement | PUB | 32 min |
| Jul 18, 1:32 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 3:30 PM MDT | Special Weather Statement | PUB | 15 min |
| Jul 18, 3:45 PM MDT | Special Weather Statement | PUB | 15 min |
| Jul 18, 3:53 PM MDT | Special Weather Statement | PUB | 52 min |
| Jul 18, 4:10 PM MDT | Special Weather Statement | PUB | 35 min |
| Jul 18, 4:24 PM MDT | Severe Thunderstorm Warning | PUB | 60 min |
| Jul 18, 5:26 PM MDT | Special Weather Statement | PUB | 19 min |
| Jul 19, 2:43 AM MDT | Dense Fog Advisory | PUB | 6 hr |
| Jul 25, 5:15 PM MDT | Special Weather Statement | PUB | 30 min |
| Jul 26, 5:35 PM MDT | Special Weather Statement | PUB | 40 min |
| Jul 26, 6:33 PM MDT | Special Weather Statement | PUB | 42 min |
| Jul 26, 7:14 PM MDT | Special Weather Statement | PUB | 46 min |
| Jul 30, 1:48 PM MDT | Flash Flood Watch | PUB | 40 hr |
| Jul 31, 3:43 PM MDT | Special Weather Statement | PUB | 32 min |
| Jul 31, 4:59 PM MDT | Special Weather Statement | PUB | 31 min |
| Jul 31, 5:28 PM MDT | Special Weather Statement | PUB | 32 min |
| Jul 31, 5:29 PM MDT | Special Weather Statement | PUB | 46 min |
| Jul 31, 5:45 PM MDT | Special Weather Statement | PUB | 30 min |
| Jul 31, 5:55 PM MDT | Severe Thunderstorm Warning | PUB | 35 min |
| Jul 31, 6:12 PM MDT | Severe Thunderstorm Warning | PUB | 33 min |
| Jul 31, 6:20 PM MDT | Special Weather Statement | PUB | 40 min |
| Jul 31, 6:21 PM MDT | Flash Flood Warning | PUB | 3 hr |
| Jul 31, 6:27 PM MDT | Severe Thunderstorm Warning | PUB | 33 min |
| Jul 31, 6:29 PM MDT | Special Weather Statement | PUB | 31 min |
| Jul 31, 6:52 PM MDT | Severe Thunderstorm Warning | PUB | 22 min |
| Jul 31, 7:01 PM MDT | Special Weather Statement | PUB | 44 min |
| Jul 31, 7:54 PM MDT | Special Weather Statement | PUB | 51 min |
| Jul 31, 8:50 PM MDT | Special Weather Statement | PUB | 40 min |
| Aug 4, 4:20 PM MDT | Special Weather Statement | PUB | 55 min |
| Aug 7, 2:34 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Aug 7, 3:01 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 7, 3:21 PM MDT | Special Weather Statement | PUB | 24 min |
| Aug 7, 3:40 PM MDT | Special Weather Statement | PUB | 35 min |
| Aug 7, 4:01 PM MDT | Special Weather Statement | PUB | 29 min |
| Aug 7, 4:31 PM MDT | Special Weather Statement | PUB | 29 min |
| Aug 21, 6:32 PM MDT | Special Weather Statement | PUB | 28 min |
| Aug 25, 5:16 PM MDT | Special Weather Statement | PUB | 29 min |
| Aug 27, 3:43 PM MDT | Special Weather Statement | PUB | 47 min |
| Aug 27, 5:08 PM MDT | Special Weather Statement | PUB | 37 min |
| Sep 14, 1:55 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 14, 8:55 PM MDT | Special Weather Statement | PUB | 35 min |
| Oct 7, 2:58 PM MDT | Fire Weather Watch | PUB | 24 hr |
| Oct 8, 2:44 PM MDT | Red Flag Warning | PUB | 29 hr |
| Oct 10, 2:19 PM MDT | Fire Weather Watch | PUB | 31 hr |
| Oct 11, 12:40 PM MDT | High Wind Warning | PUB | 30 hr |
| Oct 12, 2:46 PM MDT | Tornado Watch | SPC | 7 hr |
| Oct 12, 5:19 PM MDT | Special Weather Statement | PUB | 11 min |
| Oct 12, 5:26 PM MDT | Severe Thunderstorm Warning | PUB | 51 min |
| Oct 12, 6:16 PM MDT | Special Weather Statement | PUB | 29 min |
| Oct 15, 4:07 AM MDT | Freeze Watch | PUB | 8 hr |
| Oct 15, 11:45 AM MDT | Freeze Warning | PUB | 21 hr |
| Oct 17, 3:08 PM MDT | Fire Weather Watch | PUB | 24 hr |
| Oct 17, 3:08 PM MDT | Red Flag Warning | PUB | 28 hr |
| Oct 18, 2:55 PM MDT | Red Flag Warning | PUB | 28 hr |
| Oct 24, 2:58 PM MDT | Fire Weather Watch | PUB | 24 hr |
| Oct 25, 2:59 PM MDT | Red Flag Warning | PUB | 27 hr |
| Oct 26, 10:59 AM MDT | High Wind Warning | PUB | 16 hr |
| Oct 28, 3:45 AM MDT | High Wind Warning | PUB | 11 hr |
| Nov 6, 12:40 PM MDT | Red Flag Warning | PUB | 5 hr |
| Nov 21, 3:40 AM MST | Fire Weather Watch | PUB | 48 hr |
| Nov 22, 3:04 PM MST | Red Flag Warning | PUB | 26 hr |
| Dec 11, 3:13 PM MST | Red Flag Warning | PUB | 26 hr |
| Dec 12, 5:00 PM MST | Fire Weather Watch | PUB | 23 hr |
| Dec 13, 3:58 AM MST | High Wind Watch | PUB | 24 hr |
| Dec 13, 4:07 AM MST | Fire Weather Watch | PUB | 24 hr |
| Dec 13, 3:39 PM MST | Red Flag Warning | PUB | 26 hr |
| Dec 14, 3:51 AM MST | Red Flag Warning | PUB | 37 hr |
| Dec 14, 3:53 AM MST | High Wind Warning | PUB | 37 hr |
| Dec 15, 9:59 AM MST | Blowing Dust Advisory | PUB | 6 hr |
| Dec 15, 11:34 AM MST | Blowing Dust Warning | PUB | 4 hr |
| Dec 24, 2:48 PM MST | Fire Weather Watch | PUB | 24 hr |
| Dec 25, 2:52 PM MST | Red Flag Warning | PUB | 26 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.