Alert archive / Arkansas / Union County
Weather alerts in Union County, Arkansas, 2020
130 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Union County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 130
- Warnings
- 39
- Watches
- 17
- Advisories
- 29
- Busiest month
- May24 alerts
- Busiest day
- April 12, 20207 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 3 tornado warnings covering Union County in 2020 had a tornado report inside them.
Union County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 18 | 14 | 22% | 4 | 100% | 26 min |
| Flash flood warnings | 4 | 3 | 25% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Shreveport, LA: tornado warnings | 77 | 29 | 62% | 67 | 63% | 14 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 252 | 186 | 26% | 540 | 79% | 24 min |
| NWS Shreveport, LA: flash flood warnings | 55 | 37 | 33% | 117 | 90% | 105 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 9, 2:49 AM CST | Lake Wind Advisory | SHV | 50 hr |
| Jan 10, 4:55 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 10, 5:34 PM CST | Tornado Watch | SPC | 11 hr |
| Jan 10, 10:40 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 11, 12:28 AM CST | Tornado Watch | SPC | 8 hr |
| Jan 11, 1:30 AM CST | Severe Thunderstorm Warning | SHV | 60 min |
| Jan 11, 2:16 AM CST | Severe Thunderstorm Warning | SHV | 59 min |
| Jan 11, 8:16 AM CST | River Flood Warning | LZK | 9 days |
| Jan 14, 8:35 PM CST | Dense Fog Advisory | SHV | 12 hr |
| Jan 24, 9:46 AM CST | River Flood Warning | LZK | 47 days |
| Jan 29, 10:04 AM CST | River Flood Warning | SHV | 138 days |
| Feb 5, 12:04 PM CST | Severe Thunderstorm Warning | SHV | 24 min |
| Feb 9, 3:56 PM CST | Flash Flood Watch | SHV | 71 hr |
| Feb 10, 7:54 PM CST | Flash Flood Warning | SHV | 2 hr |
| Feb 12, 3:58 PM CST | Areal Flood Warning | SHV | 3 hr |
| Feb 23, 1:30 PM CST | Lake Wind Advisory | SHV | 29 hr |
| Mar 1, 4:46 AM CST | Lake Wind Advisory | SHV | 13 hr |
| Mar 13, 10:17 AM CDT | River Flood Warning | LZK | 57 days |
| Mar 17, 3:07 AM CDT | Dense Fog Advisory | SHV | 7 hr |
| Mar 28, 12:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 30, 7:42 PM CDT | Special Weather Statement | SHV | 33 min |
| Apr 8, 9:25 AM CDT | Special Weather Statement | SHV | 50 min |
| Apr 8, 9:47 AM CDT | Special Weather Statement | SHV | 13 min |
| Apr 12, 2:45 AM CDT | Lake Wind Advisory | SHV | 21 hr |
| Apr 12, 5:52 AM CDT | Tornado Watch | SPC | 8 hr |
| Apr 12, 8:05 AM CDT | Special Weather Statement | SHV | 40 min |
| Apr 12, 10:47 AM CDT | Severe Thunderstorm Warning | SHV | 58 min |
| Apr 12, 4:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 12, 5:59 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 12, 6:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 12, 7:10 PM CDT | Severe Thunderstorm Warning | SHV | 65 min |
| Apr 12, 7:49 PM CDT | Severe Thunderstorm Warning | SHV | 56 min |
| Apr 12, 7:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 18, 11:03 PM CDT | Special Weather Statement | SHV | 42 min |
| Apr 19, 11:19 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Apr 21, 2:58 PM CDT | Flash Flood Watch | SHV | 35 hr |
| Apr 24, 8:31 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 24, 8:37 PM CDT | Severe Thunderstorm Warning | SHV | 53 min |
| Apr 24, 10:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Apr 28, 8:25 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Apr 29, 12:11 AM CDT | Severe Thunderstorm Warning | SHV | 64 min |
| Apr 29, 12:20 AM CDT | Severe Thunderstorm Warning | SHV | 55 min |
| Apr 29, 12:51 AM CDT | Severe Thunderstorm Warning | SHV | 54 min |
| Apr 29, 3:21 PM CDT | Lake Wind Advisory | SHV | 4 hr |
| May 5, 8:37 AM CDT | Special Weather Statement | SHV | 38 min |
| May 8, 1:12 AM CDT | Lake Wind Advisory | SHV | 18 hr |
| May 8, 3:06 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 8, 5:14 AM CDT | Severe Thunderstorm Warning | SHV | 46 min |
| May 8, 5:22 AM CDT | Mesoscale Discussion | SPC | 83 min |
| May 8, 5:46 AM CDT | Severe Thunderstorm Warning | SHV | 44 min |
| May 15, 8:56 PM CDT | Severe Thunderstorm Warning | SHV | 39 min |
| May 16, 1:16 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 3:27 PM CDT | Tornado Watch | SPC | 6 hr |
| May 16, 4:37 PM CDT | Flash Flood Watch | SHV | 14 hr |
| May 16, 5:16 PM CDT | Tornado Warning | SHV | 44 min |
| May 16, 5:31 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 16, 8:13 PM CDT | Tornado Warning | SHV | 32 min |
| May 16, 8:32 PM CDT | Tornado Warning | SHV | 17 min |
| May 17, 12:19 AM CDT | Areal Flood Advisory | SHV | 3 hr |
| May 17, 10:58 AM CDT | River Flood Warning | LZK | 29 days |
| May 21, 7:05 PM CDT | Severe Thunderstorm Warning | SHV | 55 min |
| May 23, 4:56 AM CDT | Special Weather Statement | SHV | 34 min |
| May 23, 7:13 AM CDT | Special Weather Statement | SHV | 47 min |
| May 25, 6:43 PM CDT | Special Weather Statement | SHV | 47 min |
| May 26, 11:55 PM CDT | Severe Thunderstorm Warning | SHV | 57 min |
| May 27, 12:43 AM CDT | Severe Thunderstorm Warning | SHV | 27 min |
| May 27, 1:13 AM CDT | Special Weather Statement | SHV | 47 min |
| May 27, 1:28 AM CDT | Areal Flood Advisory | SHV | 3 hr |
| Jun 4, 12:32 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 5, 8:23 PM CDT | Special Weather Statement | SHV | 52 min |
| Jun 5, 8:31 PM CDT | Severe Thunderstorm Warning | SHV | 44 min |
| Jun 5, 9:16 PM CDT | Special Weather Statement | SHV | 59 min |
| Jun 7, 10:15 AM CDT | Lake Wind Advisory | SHV | 9 hr |
| Jun 8, 8:02 AM CDT | Lake Wind Advisory | SHV | 14 hr |
| Jun 9, 11:19 PM CDT | Special Weather Statement | SHV | 41 min |
| Jun 21, 6:53 PM CDT | Special Weather Statement | SHV | 37 min |
| Jun 21, 8:43 PM CDT | Severe Thunderstorm Warning | SHV | 30 min |
| Jun 21, 9:12 PM CDT | Special Weather Statement | SHV | 48 min |
| Jun 22, 3:04 AM CDT | Special Weather Statement | SHV | 56 min |
| Jun 23, 8:30 AM CDT | Special Weather Statement | SHV | 45 min |
| Jun 23, 9:01 AM CDT | Areal Flood Advisory | SHV | 3 hr |
| Jun 24, 5:40 PM CDT | Special Weather Statement | SHV | 50 min |
| Jun 25, 9:34 AM CDT | River Flood Watch | LZK | 11 hr |
| Jun 25, 8:08 PM CDT | River Flood Warning | LZK | 9 days |
| Jun 28, 4:36 PM CDT | Special Weather Statement | SHV | 54 min |
| Jun 30, 1:26 PM CDT | Heat Advisory | SHV | 54 hr |
| Jul 6, 1:47 PM CDT | Flash Flood Warning | SHV | 3 hr |
| Jul 10, 4:47 AM CDT | Heat Advisory | SHV | 5 days |
| Jul 11, 5:32 AM CDT | Excessive Heat Warning | SHV | 4 days |
| Jul 13, 3:32 AM CDT | Excessive Heat Warning | SHV | 39 hr |
| Jul 14, 2:09 PM CDT | Heat Advisory | SHV | 53 hr |
| Jul 21, 6:15 PM CDT | Special Weather Statement | SHV | 45 min |
| Jul 22, 11:57 AM CDT | Special Weather Statement | SHV | 48 min |
| Jul 30, 3:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 8:36 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jul 30, 10:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 12, 5:44 AM CDT | Areal Flood Advisory | SHV | 3 hr |
| Aug 14, 3:02 AM CDT | Heat Advisory | SHV | 64 hr |
| Aug 25, 2:49 PM CDT | Flash Flood Watch | SHV | 60 hr |
| Aug 25, 9:52 PM CDT | Tropical Storm Warning | SHV | 45 hr |
| Aug 26, 10:52 AM CDT | River Flood Warning | LZK | 6 days |
| Aug 27, 6:36 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 27, 7:47 AM CDT | Tornado Watch | SPC | 8 hr |
| Aug 27, 3:02 PM CDT | Heat Advisory | SHV | 52 hr |
| Aug 29, 3:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 30, 4:03 AM CDT | Heat Advisory | SHV | 39 hr |
| Sep 2, 12:35 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 2, 2:49 PM CDT | Special Weather Statement | SHV | 26 min |
| Sep 2, 3:15 PM CDT | Special Weather Statement | SHV | 30 min |
| Sep 5, 6:53 AM CDT | River Flood Warning | LZK | 4 days |
| Sep 8, 9:40 PM CDT | River Flood Advisory | LZK | 13 hr |
| Sep 10, 4:46 PM CDT | Areal Flood Advisory | SHV | 3 hr |
| Sep 10, 5:22 PM CDT | Flash Flood Warning | SHV | 3 hr |
| Sep 23, 10:48 AM CDT | Flash Flood Warning | SHV | 4 hr |
| Sep 24, 5:08 AM CDT | River Flood Warning | LZK | 6 days |
| Sep 26, 5:04 AM CDT | Dense Fog Advisory | SHV | 5 hr |
| Sep 28, 1:43 AM CDT | Lake Wind Advisory | SHV | 17 hr |
| Sep 30, 10:33 AM CDT | River Flood Advisory | LZK | 2 min |
| Oct 8, 2:27 AM CDT | Flash Flood Watch | SHV | 55 hr |
| Oct 9, 10:24 AM CDT | Lake Wind Advisory | SHV | 29 hr |
| Oct 23, 3:13 PM CDT | Special Weather Statement | SHV | 32 min |
| Oct 23, 4:02 PM CDT | Special Weather Statement | SHV | 43 min |
| Oct 29, 3:03 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| Nov 25, 1:17 AM CST | Mesoscale Discussion | SPC | 118 min |
| Nov 25, 2:29 AM CST | Special Weather Statement | SHV | 46 min |
| Nov 30, 1:47 PM CST | Freeze Warning | SHV | 19 hr |
| Dec 19, 9:38 PM CST | Dense Fog Advisory | SHV | 11 hr |
| Dec 23, 3:07 AM CST | Lake Wind Advisory | SHV | 38 hr |
| Dec 23, 3:46 PM CST | Mesoscale Discussion | SPC | 89 min |
| Dec 30, 3:12 AM CST | Flash Flood Watch | SHV | 45 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 | 18 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 26 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 4 |
| River Flood Warning | 9 |
| Flash Flood Watch | 6 |
| River Flood Watch | 1 |
| Areal Flood Advisory | 5 |
| River Flood Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 2 |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| Lake Wind Advisory | 12 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
| Tropical | |
| Tropical Storm Warning | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.