Alert archive / Mississippi / Yazoo County
Weather alerts in Yazoo County, Mississippi, 2020
136 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Yazoo County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 136
- Warnings
- 50
- Watches
- 22
- Advisories
- 20
- Busiest month
- April29 alerts
- Busiest day
- April 12, 202011 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
4 of 4 tornado warnings covering Yazoo County in 2020 had a tornado report inside them; 9 of 9 tornado reports fell inside a warning, on average 21 minutes after it went out.
Yazoo County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 4 | 0% | 9 | 100% | 21 min |
| Severe thunderstorm warnings | 30 | 17 | 43% | 17 | 100% | 28 min |
| Flash flood warnings | 4 | 4 | 0% | 10 | 80% | 95 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: tornado warnings | 60 | 37 | 38% | 149 | 85% | 26 min |
| NWS Jackson, MS: severe thunderstorm warnings | 423 | 268 | 37% | 898 | 83% | 26 min |
| NWS Jackson, MS: flash flood warnings | 108 | 73 | 32% | 276 | 85% | 87 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 1, 3:07 AM CST | Flash Flood Watch | JAN | 57 hr |
| Jan 1, 10:42 AM CST | River Flood Warning | JAN | 21 days |
| Jan 2, 2:15 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Jan 4, 7:54 PM CST | River Flood Warning | JAN | 49 hr |
| Jan 9, 2:27 PM CST | Wind Advisory | JAN | 48 hr |
| Jan 11, 2:22 AM CST | Mesoscale Discussion | SPC | 53 min |
| Jan 11, 2:37 AM CST | Tornado Watch | SPC | 8 hr |
| Jan 11, 4:30 AM CST | Severe Thunderstorm Warning | JAN | 60 min |
| Jan 11, 4:31 AM CST | Mesoscale Discussion | SPC | 59 min |
| Jan 11, 5:28 AM CST | Severe Thunderstorm Warning | JAN | 62 min |
| Jan 11, 6:27 AM CST | Severe Thunderstorm Warning | JAN | 63 min |
| Jan 11, 11:52 AM CST | River Flood Warning | JAN | 131 days |
| Jan 13, 8:05 AM CST | Dense Fog Advisory | JAN | 3 hr |
| Jan 14, 3:00 AM CST | Flash Flood Watch | JAN | 21 hr |
| Jan 14, 4:40 AM CST | Flash Flood Warning | JAN | 3 hr |
| Jan 14, 5:33 AM CST | Special Weather Statement | JAN | 42 min |
| Jan 14, 5:45 AM CST | Flash Flood Warning | JAN | 3 hr |
| Jan 14, 2:12 PM CST | Areal Flood Warning | JAN | 9 hr |
| Jan 28, 12:33 AM CST | Dense Fog Advisory | JAN | 10 hr |
| Feb 5, 10:28 AM CST | Mesoscale Discussion | SPC | 92 min |
| Feb 5, 11:49 AM CST | Tornado Watch | SPC | 6 hr |
| Feb 5, 1:39 PM CST | Mesoscale Discussion | SPC | 96 min |
| Feb 5, 3:01 PM CST | Severe Thunderstorm Warning | JAN | 44 min |
| Feb 5, 3:21 PM CST | Tornado Warning | JAN | 54 min |
| Feb 5, 3:41 PM CST | Mesoscale Discussion | SPC | 64 min |
| Feb 6, 9:45 AM CST | River Flood Warning | JAN | 37 days |
| Feb 9, 4:42 AM CST | Flash Flood Watch | JAN | 47 hr |
| Feb 10, 12:26 PM CST | Severe Thunderstorm Warning | JAN | 49 min |
| Feb 10, 12:38 PM CST | Flash Flood Warning | JAN | 6 hr |
| Feb 10, 12:39 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 10, 1:36 PM CST | Flash Flood Warning | JAN | 3 hr |
| Feb 10, 8:49 PM CST | Tornado Warning | JAN | 56 min |
| Feb 11, 2:05 AM CST | Areal Flood Warning | JAN | 6 hr |
| Feb 11, 3:34 AM CST | Flash Flood Watch | JAN | 49 hr |
| Feb 12, 1:46 PM CST | Mesoscale Discussion | SPC | 119 min |
| Feb 17, 2:14 PM CST | Flash Flood Watch | JAN | 31 hr |
| Feb 19, 2:59 PM CST | Flash Flood Watch | JAN | 18 hr |
| Mar 4, 1:19 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 4, 1:31 AM CST | Severe Thunderstorm Warning | JAN | 44 min |
| Mar 4, 1:53 AM CST | Tornado Watch | SPC | 8 hr |
| Mar 4, 2:06 AM CST | Severe Thunderstorm Warning | JAN | 54 min |
| Mar 4, 3:50 AM CST | Special Weather Statement | JAN | 25 min |
| Mar 4, 3:57 AM CST | Severe Thunderstorm Warning | JAN | 48 min |
| Mar 28, 7:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Mar 28, 9:58 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 8, 12:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 11, 11:28 AM CDT | River Flood Warning | JAN | 22 days |
| Apr 11, 3:44 PM CDT | Wind Advisory | JAN | 30 hr |
| Apr 12, 8:51 AM CDT | Special Weather Statement | JAN | 39 min |
| Apr 12, 10:24 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Apr 12, 10:41 AM CDT | Tornado Watch | SPC | 10 hr |
| Apr 12, 12:03 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Apr 12, 12:35 PM CDT | Severe Thunderstorm Warning | JAN | 40 min |
| Apr 12, 1:05 PM CDT | Tornado Warning | JAN | 55 min |
| Apr 12, 1:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Apr 12, 3:27 PM CDT | Severe Thunderstorm Warning | JAN | 20 min |
| Apr 12, 5:21 PM CDT | Severe Thunderstorm Warning | JAN | 39 min |
| Apr 12, 5:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 12, 5:56 PM CDT | Severe Thunderstorm Warning | JAN | 44 min |
| Apr 12, 9:44 PM CDT | Severe Thunderstorm Warning | JAN | 61 min |
| Apr 12, 9:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 18, 4:31 AM CDT | Flash Flood Watch | JAN | 41 hr |
| Apr 19, 1:22 AM CDT | Severe Thunderstorm Warning | JAN | 38 min |
| Apr 19, 1:58 AM CDT | Severe Thunderstorm Warning | JAN | 47 min |
| Apr 19, 2:34 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Apr 19, 11:45 AM CDT | Tornado Watch | SPC | 9 hr |
| Apr 19, 1:00 PM CDT | Special Weather Statement | JAN | 45 min |
| Apr 19, 2:08 PM CDT | Severe Thunderstorm Warning | JAN | 67 min |
| Apr 19, 3:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Apr 21, 2:16 PM CDT | Flash Flood Watch | JAN | 44 hr |
| Apr 28, 11:57 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Apr 29, 12:48 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 29, 2:07 AM CDT | Special Weather Statement | JAN | 53 min |
| Apr 29, 4:59 AM CDT | Special Weather Statement | JAN | 61 min |
| May 7, 3:58 PM CDT | Wind Advisory | JAN | 27 hr |
| May 17, 12:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 17, 1:56 PM CDT | Special Weather Statement | JAN | 34 min |
| May 23, 11:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| May 23, 2:27 PM CDT | Severe Thunderstorm Warning | JAN | 63 min |
| May 23, 3:18 PM CDT | Severe Thunderstorm Warning | JAN | 30 min |
| May 27, 2:26 PM CDT | Severe Thunderstorm Warning | JAN | 26 min |
| May 27, 2:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 3, 7:14 PM CDT | Severe Thunderstorm Warning | JAN | 44 min |
| Jun 5, 2:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 5, 2:49 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 5, 5:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 5, 5:08 PM CDT | Severe Thunderstorm Warning | JAN | 82 min |
| Jun 6, 4:24 PM CDT | Flash Flood Watch | JAN | 57 hr |
| Jun 7, 11:26 AM CDT | Wind Advisory | JAN | 22 hr |
| Jun 8, 9:22 AM CDT | River Flood Warning | JAN | 21 days |
| Jun 8, 9:28 AM CDT | River Flood Warning | JAN | 5 days |
| Jun 21, 6:31 PM CDT | Severe Thunderstorm Warning | JAN | 44 min |
| Jun 21, 7:12 PM CDT | Severe Thunderstorm Warning | JAN | 13 min |
| Jul 1, 7:31 PM CDT | Severe Thunderstorm Warning | JAN | 44 min |
| Jul 2, 12:34 PM CDT | Special Weather Statement | JAN | 26 min |
| Jul 2, 1:28 PM CDT | Special Weather Statement | JAN | 32 min |
| Jul 2, 2:30 PM CDT | Severe Thunderstorm Warning | JAN | 45 min |
| Jul 4, 7:00 PM CDT | Special Weather Statement | JAN | 30 min |
| Jul 8, 9:18 AM CDT | Special Weather Statement | JAN | 27 min |
| Jul 10, 2:38 AM CDT | Heat Advisory | JAN | 16 hr |
| Jul 10, 3:19 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 11, 2:32 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 13, 2:58 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 14, 2:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 14, 2:22 PM CDT | Heat Advisory | JAN | 29 hr |
| Jul 15, 7:16 PM CDT | Heat Advisory | JAN | 24 hr |
| Jul 31, 12:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 31, 1:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 3:14 PM CDT | Special Weather Statement | JAN | 46 min |
| Aug 11, 4:15 AM CDT | Heat Advisory | JAN | 14 hr |
| Aug 12, 7:30 PM CDT | Severe Thunderstorm Warning | JAN | 34 min |
| Aug 16, 3:18 AM CDT | Heat Advisory | JAN | 15 hr |
| Aug 20, 7:02 PM CDT | Special Weather Statement | JAN | 28 min |
| Aug 20, 7:04 PM CDT | Severe Thunderstorm Warning | JAN | 41 min |
| Aug 27, 4:59 AM CDT | Wind Advisory | JAN | 26 hr |
| Aug 27, 6:36 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 27, 7:47 AM CDT | Tornado Watch | SPC | 8 hr |
| Aug 27, 2:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Aug 27, 3:47 PM CDT | Tornado Watch | SPC | 8 hr |
| Aug 28, 3:16 PM CDT | Heat Advisory | JAN | 28 hr |
| Aug 30, 1:39 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 30, 2:47 PM CDT | Special Weather Statement | JAN | 28 min |
| Aug 31, 3:22 PM CDT | Special Weather Statement | JAN | 23 min |
| Sep 1, 2:49 AM CDT | Heat Advisory | JAN | 16 hr |
| Sep 23, 3:56 AM CDT | Flash Flood Watch | JAN | 30 hr |
| Sep 24, 2:07 PM CDT | River Flood Warning | JAN | 6 days |
| Sep 27, 4:02 AM CDT | Dense Fog Advisory | JAN | 6 hr |
| Oct 7, 4:01 PM CDT | Flash Flood Watch | JAN | 63 hr |
| Oct 9, 4:20 AM CDT | Wind Advisory | JAN | 33 hr |
| Oct 9, 8:41 AM CDT | River Flood Warning | JAN | 5 days |
| Nov 30, 2:07 PM CST | Freeze Warning | JAN | 19 hr |
| Dec 13, 7:16 PM CST | Severe Thunderstorm Warning | JAN | 59 min |
| Dec 13, 8:07 PM CST | Severe Thunderstorm Warning | JAN | 38 min |
| Dec 20, 7:57 PM CST | Dense Fog Advisory | JAN | 13 hr |
| Dec 23, 10:09 PM CST | Severe Thunderstorm Warning | JAN | 56 min |
| Dec 23, 10:12 PM CST | Tornado Warning | JAN | 63 min |
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 | 30 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 29 |
| Special Weather Statement | 15 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 4 |
| River Flood Warning | 9 |
| Flash Flood Watch | 11 |
| Heat | |
| Heat Advisory | 10 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
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.