Alert archive / Arkansas / Columbia County
Weather alerts in Columbia County, Arkansas, 2021
137 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Columbia County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 137
- Warnings
- 24
- Watches
- 20
- Advisories
- 41
- Busiest month
- March24 alerts
- Busiest day
- March 17, 20217 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Columbia County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 7 | 30% | 3 | 100% | 18 min |
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Shreveport, LA: tornado warnings | 36 | 16 | 56% | 35 | 74% | 17 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 221 | 135 | 39% | 359 | 71% | 22 min |
| NWS Shreveport, LA: flash flood warnings | 34 | 19 | 44% | 83 | 82% | 129 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, 2:55 AM CST | Winter Weather Advisory | SHV | 29 hr |
| Jan 14, 9:11 PM CST | Wind Advisory | SHV | 21 hr |
| Jan 20, 9:49 AM CST | River Flood Warning | SHV | 14 days |
| Jan 24, 5:58 PM CST | Special Weather Statement | SHV | 32 min |
| Jan 29, 2:13 PM CST | Lake Wind Advisory | SHV | 28 hr |
| Feb 10, 2:29 PM CST | Winter Weather Advisory | SHV | 46 hr |
| Feb 12, 4:03 PM CST | Winter Storm Watch | SHV | 10 hr |
| Feb 13, 2:25 AM CST | Winter Storm Warning | SHV | 60 hr |
| Feb 13, 2:57 PM CST | Wind Chill Advisory | SHV | 69 hr |
| Feb 13, 6:01 PM CST | Hard Freeze Warning | SHV | 66 hr |
| Feb 15, 1:08 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 15, 2:27 PM CST | Winter Storm Warning | SHV | 67 hr |
| Feb 17, 9:15 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 18, 9:41 AM CST | Hard Freeze Warning | SHV | 24 hr |
| Feb 19, 9:11 AM CST | Hard Freeze Warning | SHV | 25 hr |
| Feb 19, 9:56 PM CST | Freezing Fog Advisory | SHV | 12 hr |
| Feb 22, 8:24 PM CST | River Flood Warning | SHV | 18 days |
| Feb 25, 10:45 PM CST | Severe Thunderstorm Warning | SHV | 45 min |
| Feb 25, 11:25 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 27, 9:09 PM CST | Dense Fog Advisory | SHV | 5 hr |
| Feb 28, 5:54 PM CST | Severe Thunderstorm Watch | SPC | 4 hr |
| Feb 28, 9:01 PM CST | Mesoscale Discussion | SPC | 89 min |
| Mar 10, 3:52 AM CST | Lake Wind Advisory | SHV | 13 hr |
| Mar 15, 3:03 AM CDT | Dense Fog Advisory | SHV | 7 hr |
| Mar 15, 3:03 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| Mar 17, 1:32 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Mar 17, 2:01 AM CDT | Special Weather Statement | SHV | 44 min |
| Mar 17, 2:45 AM CDT | Lake Wind Advisory | SHV | 40 hr |
| Mar 17, 4:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Mar 17, 6:40 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Mar 17, 8:43 AM CDT | Tornado Watch | SPC | 4 hr |
| Mar 17, 9:26 AM CDT | Special Weather Statement | SHV | 64 min |
| Mar 18, 9:58 AM CDT | River Flood Warning | SHV | 35 days |
| Mar 22, 2:12 AM CDT | Lake Wind Advisory | SHV | 24 hr |
| Mar 24, 11:37 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Mar 25, 2:41 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| Mar 27, 2:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Mar 27, 3:25 PM CDT | Tornado Watch | SPC | 10 hr |
| Mar 27, 4:04 PM CDT | Special Weather Statement | SHV | 41 min |
| Mar 27, 6:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 27, 7:56 PM CDT | Severe Thunderstorm Warning | SHV | 49 min |
| Mar 30, 6:47 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 2:47 AM CDT | Severe Thunderstorm Warning | SHV | 43 min |
| Mar 31, 3:27 AM CDT | Lake Wind Advisory | SHV | 16 hr |
| Mar 31, 3:30 AM CDT | Special Weather Statement | SHV | 45 min |
| Apr 1, 2:35 PM CDT | Freeze Warning | SHV | 18 hr |
| Apr 7, 11:10 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 7, 12:38 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 7, 2:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Apr 7, 3:40 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Apr 9, 12:07 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 9, 2:03 PM CDT | Severe Thunderstorm Warning | SHV | 30 min |
| Apr 9, 2:32 PM CDT | Severe Thunderstorm Warning | SHV | 43 min |
| Apr 9, 3:05 PM CDT | Severe Thunderstorm Warning | SHV | 55 min |
| Apr 9, 5:32 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 9, 11:55 PM CDT | Severe Thunderstorm Warning | SHV | 65 min |
| Apr 10, 12:52 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 23, 9:20 AM CDT | River Flood Warning | SHV | 55 days |
| Apr 23, 2:21 PM CDT | Lake Wind Advisory | SHV | 17 hr |
| Apr 24, 2:52 AM CDT | Special Weather Statement | SHV | 38 min |
| Apr 28, 2:43 PM CDT | Flash Flood Watch | SHV | 23 hr |
| May 3, 3:08 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| May 3, 8:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 9:10 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 4, 6:44 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 4, 10:52 AM CDT | Tornado Watch | SPC | 7 hr |
| May 9, 12:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| May 9, 1:14 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 9, 3:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 9, 4:49 PM CDT | Special Weather Statement | SHV | 41 min |
| May 9, 5:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 9, 6:47 PM CDT | Special Weather Statement | SHV | 58 min |
| May 9, 7:17 PM CDT | Severe Thunderstorm Warning | SHV | 58 min |
| May 11, 2:04 AM CDT | Flash Flood Watch | SHV | 24 hr |
| May 17, 1:56 PM CDT | Flash Flood Watch | SHV | 5 days |
| May 18, 2:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 2:23 AM CDT | Flash Flood Warning | SHV | 3 hr |
| May 26, 3:56 AM CDT | Special Weather Statement | SHV | 64 min |
| May 26, 4:20 AM CDT | Flash Flood Warning | SHV | 4 hr |
| May 28, 12:59 AM CDT | Special Weather Statement | SHV | 46 min |
| May 28, 1:50 AM CDT | Special Weather Statement | SHV | 40 min |
| Jun 7, 3:04 AM CDT | Flash Flood Watch | SHV | 52 hr |
| Jun 7, 12:32 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 7, 3:04 PM CDT | Special Weather Statement | SHV | 56 min |
| Jun 7, 3:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 3:52 PM CDT | Special Weather Statement | SHV | 53 min |
| Jun 8, 11:17 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 8, 12:42 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 9, 12:55 PM CDT | Flash Flood Watch | SHV | 21 hr |
| Jun 28, 4:59 PM CDT | Special Weather Statement | SHV | 61 min |
| Jul 11, 2:54 AM CDT | Special Weather Statement | SHV | 51 min |
| Jul 16, 6:45 PM CDT | Special Weather Statement | SHV | 45 min |
| Jul 19, 7:02 AM CDT | Areal Flood Advisory | SHV | 3 hr |
| Jul 24, 2:38 PM CDT | Heat Advisory | SHV | 28 hr |
| Jul 25, 2:11 PM CDT | Heat Advisory | SHV | 29 hr |
| Jul 26, 2:40 PM CDT | Heat Advisory | SHV | 28 hr |
| Jul 27, 8:05 AM CDT | Special Weather Statement | SHV | 25 min |
| Jul 27, 2:18 PM CDT | Heat Advisory | SHV | 29 hr |
| Jul 28, 2:27 PM CDT | Heat Advisory | SHV | 29 hr |
| Jul 29, 1:58 PM CDT | Heat Advisory | SHV | 3 days |
| Aug 1, 9:38 PM CDT | Special Weather Statement | SHV | 37 min |
| Aug 9, 2:55 AM CDT | Heat Advisory | SHV | 16 hr |
| Aug 9, 7:04 PM CDT | Heat Advisory | SHV | 3 days |
| Aug 19, 2:24 PM CDT | Special Weather Statement | SHV | 36 min |
| Aug 19, 3:29 PM CDT | Special Weather Statement | SHV | 46 min |
| Aug 21, 2:07 AM CDT | Heat Advisory | SHV | 5 days |
| Aug 26, 3:53 AM CDT | Heat Advisory | SHV | 14 hr |
| Aug 31, 3:03 PM CDT | Heat Advisory | SHV | 28 hr |
| Sep 21, 11:51 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 27, 9:44 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 27, 12:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Oct 27, 3:07 PM CDT | Lake Wind Advisory | SHV | 52 hr |
| Nov 4, 2:48 PM CDT | Freeze Warning | SHV | 18 hr |
| Nov 7, 5:01 AM CST | Dense Fog Advisory | SHV | 4 hr |
| Nov 11, 1:19 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Nov 11, 1:23 AM CST | Special Weather Statement | SHV | 67 min |
| Nov 17, 2:48 AM CST | Lake Wind Advisory | SHV | 13 hr |
| Nov 18, 3:31 AM CST | Freeze Warning | SHV | 27 hr |
| Dec 2, 4:53 AM CST | Dense Fog Advisory | SHV | 5 hr |
| Dec 3, 3:41 AM CST | Dense Fog Advisory | SHV | 6 hr |
| Dec 6, 12:36 AM CST | Lake Wind Advisory | SHV | 14 hr |
| Dec 10, 3:49 AM CST | Lake Wind Advisory | SHV | 31 hr |
| Dec 10, 6:34 PM CST | Tornado Watch | SPC | 4 hr |
| Dec 10, 10:00 PM CST | Mesoscale Discussion | SPC | 90 min |
| Dec 10, 10:44 PM CST | Tornado Watch | SPC | 6 hr |
| Dec 11, 12:09 AM CST | Severe Thunderstorm Warning | SHV | 51 min |
| Dec 16, 2:08 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Dec 18, 3:03 AM CST | Lake Wind Advisory | SHV | 15 hr |
| Dec 21, 5:12 AM CST | Dense Fog Advisory | SHV | 5 hr |
| Dec 23, 2:34 PM CST | Lake Wind Advisory | SHV | 36 hr |
| Dec 26, 3:49 AM CST | Dense Fog Advisory | SHV | 6 hr |
| Dec 28, 2:05 AM CST | Lake Wind Advisory | SHV | 13 hr |
| Dec 29, 9:25 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 29, 1:15 PM CST | Special Weather Statement | SHV | 30 min |
| Dec 29, 1:33 PM CST | Severe Thunderstorm Warning | SHV | 42 min |
| Dec 29, 4:44 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 29, 8:51 PM CST | Dense Fog Advisory | SHV | 14 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 | 10 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 30 |
| Special Weather Statement | 22 |
| Flooding | |
| Flash Flood Warning | 2 |
| River Flood Warning | 4 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Heat Advisory | 11 |
| Cold | |
| Freeze Warning | 3 |
| Hard Freeze Warning | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Lake Wind Advisory | 16 |
| Wind Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
| Freezing Fog Advisory | 1 |
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. Warning verification from the Mesonet's Cow. Rebuilt daily.