Alert archive / Mississippi / Washington County
Weather alerts in Washington County, Mississippi, 2020
124 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Washington County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 124
- Warnings
- 39
- Watches
- 16
- Advisories
- 25
- Busiest month
- April23 alerts
- Busiest day
- June 21, 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.
1 of 1 tornado warnings covering Washington County in 2020 had a tornado report inside them.
Washington County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 0 | ||
| Severe thunderstorm warnings | 23 | 9 | 61% | 10 | 60% | 25 min |
| Flash flood warnings | 4 | 3 | 25% | 3 | 100% | 64 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 8, 11:38 AM CST | River Flood Advisory | JAN | 51 hr |
| Jan 8, 11:38 AM CST | River Flood Advisory | JAN | 51 hr |
| Jan 9, 2:27 PM CST | Wind Advisory | JAN | 48 hr |
| Jan 10, 4:53 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 10, 11:43 AM CST | River Flood Warning | JAN | 21 days |
| Jan 10, 11:43 AM CST | River Flood Warning | JAN | 23 days |
| Jan 10, 11:58 PM CST | Tornado Watch | SPC | 7 hr |
| Jan 11, 3:32 AM CST | Tornado Warning | JAN | 58 min |
| Jan 11, 4:30 AM CST | Severe Thunderstorm Warning | JAN | 60 min |
| Jan 11, 4:31 AM CST | Mesoscale Discussion | SPC | 59 min |
| Jan 14, 3:00 AM CST | Flash Flood Watch | JAN | 21 hr |
| Jan 14, 4:20 AM CST | Flash Flood Warning | JAN | 3 hr |
| Jan 14, 6:47 PM CST | Dense Fog Advisory | JAN | 12 hr |
| Jan 28, 12:33 AM CST | Dense Fog Advisory | JAN | 10 hr |
| Feb 5, 2:02 PM CST | Special Weather Statement | JAN | 28 min |
| Feb 6, 8:41 PM CST | River Flood Warning | JAN | 15 hr |
| Feb 8, 12:25 PM CST | River Flood Warning | JAN | 30 days |
| Feb 9, 4:42 AM CST | Flash Flood Watch | JAN | 47 hr |
| Feb 10, 11:04 AM CST | River Flood Warning | JAN | 27 days |
| Feb 11, 3:34 AM CST | Flash Flood Watch | JAN | 49 hr |
| Feb 24, 12:20 PM CST | Mesoscale Discussion | SPC | 115 min |
| Mar 17, 11:05 AM CDT | River Flood Warning | JAN | 43 days |
| Mar 17, 11:05 AM CDT | River Flood Warning | JAN | 46 days |
| Mar 22, 11:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 22, 11:47 PM CDT | Severe Thunderstorm Warning | JAN | 43 min |
| Mar 23, 5:49 AM CDT | Special Weather Statement | JAN | 26 min |
| Mar 24, 7:55 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 24, 9:30 PM CDT | Severe Thunderstorm Warning | JAN | 34 min |
| Mar 24, 10:30 PM CDT | Special Weather Statement | JAN | 45 min |
| Mar 24, 11:30 PM CDT | Special Weather Statement | JAN | 45 min |
| Mar 28, 6:34 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 28, 10:08 PM CDT | Severe Thunderstorm Warning | JAN | 31 min |
| Apr 8, 11:24 AM CDT | Special Weather Statement | JAN | 36 min |
| Apr 8, 12:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 8, 12:18 PM CDT | Severe Thunderstorm Warning | JAN | 37 min |
| Apr 11, 3:44 PM CDT | Wind Advisory | JAN | 30 hr |
| 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, 12:26 PM CDT | Severe Thunderstorm Warning | JAN | 37 min |
| Apr 12, 5:19 PM CDT | Severe Thunderstorm Warning | JAN | 41 min |
| Apr 12, 7:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 12, 8:44 PM CDT | Severe Thunderstorm Warning | JAN | 76 min |
| Apr 12, 9:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 19, 2:34 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Apr 21, 2:16 PM CDT | Flash Flood Watch | JAN | 44 hr |
| Apr 22, 8:58 PM CDT | Wind Advisory | JAN | 8 hr |
| Apr 22, 10:56 PM CDT | Special Weather Statement | JAN | 34 min |
| Apr 22, 11:23 PM CDT | Severe Thunderstorm Warning | JAN | 37 min |
| Apr 25, 2:18 AM CDT | Special Weather Statement | JAN | 42 min |
| 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, 1:22 AM CDT | Special Weather Statement | JAN | 53 min |
| Apr 29, 3:37 AM CDT | Special Weather Statement | JAN | 83 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 8, 9:17 AM CDT | Special Weather Statement | JAN | 88 min |
| May 16, 6:21 PM CDT | Mesoscale Discussion | SPC | 84 min |
| May 23, 11:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| May 25, 9:00 PM CDT | Special Weather Statement | JAN | 60 min |
| May 31, 11:08 AM CDT | River Flood Warning | JAN | 9 days |
| May 31, 11:08 AM CDT | River Flood Warning | JAN | 10 days |
| Jun 3, 8:01 PM CDT | Severe Thunderstorm Warning | JAN | 59 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, 4:34 PM CDT | Severe Thunderstorm Warning | JAN | 41 min |
| Jun 5, 5:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 5, 5:20 PM CDT | Severe Thunderstorm Warning | JAN | 70 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 21, 2:22 AM CDT | Special Weather Statement | JAN | 23 min |
| Jun 21, 3:18 AM CDT | Special Weather Statement | JAN | 42 min |
| Jun 21, 4:50 AM CDT | Special Weather Statement | JAN | 25 min |
| Jun 21, 4:03 PM CDT | Severe Thunderstorm Warning | JAN | 42 min |
| Jun 21, 4:32 PM CDT | Severe Thunderstorm Warning | JAN | 23 min |
| Jun 21, 4:38 PM CDT | Severe Thunderstorm Warning | JAN | 37 min |
| Jun 21, 5:17 PM CDT | Special Weather Statement | JAN | 43 min |
| Jun 26, 2:02 PM CDT | Special Weather Statement | JAN | 43 min |
| Jul 2, 3:08 PM CDT | Severe Thunderstorm Warning | JAN | 37 min |
| Jul 2, 3:42 PM CDT | Severe Thunderstorm Warning | JAN | 48 min |
| Jul 2, 4:19 PM CDT | Severe Thunderstorm Warning | JAN | 41 min |
| Jul 2, 4:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 5:09 PM CDT | Severe Thunderstorm Warning | JAN | 51 min |
| Jul 4, 3:04 PM CDT | Severe Thunderstorm Warning | JAN | 41 min |
| Jul 8, 6:54 AM CDT | Special Weather Statement | JAN | 51 min |
| Jul 9, 3:41 PM CDT | Mesoscale Discussion | SPC | 94 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, 1:56 PM CDT | Severe Thunderstorm Warning | JAN | 64 min |
| Jul 31, 2:32 PM CDT | Severe Thunderstorm Warning | JAN | 58 min |
| Jul 31, 2:47 PM CDT | Severe Thunderstorm Warning | JAN | 58 min |
| Aug 10, 3:51 AM CDT | Heat Advisory | JAN | 14 hr |
| Aug 11, 4:15 AM CDT | Heat Advisory | JAN | 14 hr |
| Aug 14, 9:12 AM CDT | Special Weather Statement | JAN | 63 min |
| Aug 14, 10:00 AM CDT | Special Weather Statement | JAN | 60 min |
| Aug 16, 3:18 AM CDT | Heat Advisory | JAN | 15 hr |
| Aug 26, 10:46 AM CDT | Tropical Storm Warning | JAN | 29 hr |
| 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 29, 3:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 31, 2:39 AM CDT | Heat Advisory | JAN | 16 hr |
| Sep 1, 2:49 AM CDT | Heat Advisory | JAN | 16 hr |
| Sep 23, 3:56 AM CDT | Flash Flood Watch | JAN | 30 hr |
| Sep 23, 6:53 AM CDT | Flash Flood Warning | JAN | 3 hr |
| Sep 23, 10:14 AM CDT | Flash Flood Warning | JAN | 2 hr |
| Sep 23, 12:15 PM CDT | Flash Flood Warning | JAN | 3 hr |
| 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 |
| Nov 30, 2:07 PM CST | Freeze Warning | JAN | 19 hr |
| Dec 20, 7:57 PM CST | Dense Fog Advisory | JAN | 13 hr |
| Dec 23, 9:03 PM CST | Special Weather Statement | JAN | 57 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 | 23 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 23 |
| Special Weather Statement | 21 |
| Flooding | |
| Flash Flood Warning | 4 |
| River Flood Warning | 9 |
| Flash Flood Watch | 8 |
| River Flood Advisory | 2 |
| Heat | |
| Heat Advisory | 12 |
| Cold | |
| Freeze Warning | 1 |
| Wind and dust | |
| Wind Advisory | 7 |
| 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.