Alert archive / Missouri / Washington County
Weather alerts in Washington County, Missouri, 2024
128 weather alerts in 2024, 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 2024. Tap one for its archive.
- Alerts
- 128
- Warnings
- 46
- Watches
- 26
- Advisories
- 28
- Busiest month
- May40 alerts
- Busiest day
- May 8, 202418 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 7 tornado warnings covering Washington County in 2024 had a tornado report inside them.
Washington County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 7 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 23 | 15 | 35% | 12 | 83% | 17 min |
| Flash flood warnings | 6 | 5 | 17% | 4 | 25% | 58 min |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS St. Louis, MO: tornado warnings | 80 | 25 | 69% | 57 | 56% | 14 min |
| NWS St. Louis, MO: severe thunderstorm warnings | 378 | 178 | 53% | 985 | 64% | 24 min |
| NWS St. Louis, MO: flash flood warnings | 59 | 32 | 46% | 123 | 85% | 86 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 8, 2:41 AM CST | Winter Weather Advisory | LSX | 40 hr |
| Jan 11, 12:56 PM CST | Wind Advisory | LSX | 38 hr |
| Jan 12, 2:57 AM CST | Wind Chill Warning | LSX | 4 days |
| Jan 12, 2:07 PM CST | Wind Chill Advisory | LSX | 5 days |
| Jan 18, 2:48 AM CST | Wind Chill Advisory | LSX | 57 hr |
| Jan 21, 1:53 AM CST | Winter Weather Advisory | LSX | 43 hr |
| Jan 22, 3:27 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 23, 4:12 PM CST | Dense Fog Advisory | LSX | 67 hr |
| Jan 25, 5:45 PM CST | Dense Fog Advisory | LSX | 16 hr |
| Feb 11, 1:28 PM CST | Winter Weather Advisory | LSX | 20 hr |
| Feb 15, 1:06 PM CST | Winter Weather Advisory | LSX | 28 hr |
| Feb 26, 12:23 PM CST | Red Flag Warning | LSX | 31 hr |
| Feb 26, 2:02 PM CST | Wind Advisory | LSX | 28 hr |
| Feb 27, 12:00 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 13, 2:56 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 13, 3:41 PM CDT | Severe Thunderstorm Warning | LSX | 49 min |
| Mar 13, 3:50 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 14, 4:41 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 14, 12:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Mar 14, 1:33 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 14, 3:20 PM CDT | Severe Thunderstorm Warning | LSX | 40 min |
| Mar 14, 3:53 PM CDT | Severe Thunderstorm Warning | LSX | 38 min |
| Mar 14, 3:55 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Mar 14, 5:27 PM CDT | Severe Thunderstorm Warning | LSX | 78 min |
| Mar 24, 2:18 PM CDT | Wind Advisory | LSX | 29 hr |
| Mar 26, 2:28 PM CDT | Freeze Warning | LSX | 19 hr |
| Apr 1, 4:49 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 1, 10:37 PM CDT | Tornado Watch | SPC | 4 hr |
| Apr 1, 11:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Apr 2, 12:25 AM CDT | Severe Thunderstorm Warning | LSX | 50 min |
| Apr 2, 12:43 AM CDT | Tornado Warning | LSX | 47 min |
| Apr 2, 12:48 AM CDT | Tornado Warning | LSX | 42 min |
| Apr 2, 1:16 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 2, 1:18 AM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| Apr 4, 2:32 AM CDT | Freeze Warning | LSX | 29 hr |
| Apr 5, 2:33 AM CDT | Frost Advisory | LSX | 29 hr |
| Apr 15, 3:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Apr 16, 3:21 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 16, 3:29 PM CDT | Severe Thunderstorm Warning | LSX | 28 min |
| Apr 18, 12:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 18, 12:56 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 18, 3:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 18, 5:37 PM CDT | Severe Thunderstorm Warning | LSX | 53 min |
| Apr 18, 6:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Apr 18, 6:13 PM CDT | Severe Thunderstorm Warning | LSX | 77 min |
| Apr 21, 1:54 PM CDT | Frost Advisory | LSX | 18 hr |
| Apr 23, 11:49 PM CDT | Dense Fog Advisory | LSX | 4 hr |
| Apr 29, 12:48 AM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| Apr 29, 1:01 AM CDT | Tornado Warning | LSX | 44 min |
| Apr 29, 7:56 AM CDT | River Flood Warning | LSX | 44 hr |
| Apr 29, 11:04 PM CDT | Dense Fog Advisory | LSX | 10 hr |
| May 4, 3:53 PM CDT | Mesoscale Discussion | SPC | 97 min |
| May 4, 5:32 PM CDT | Severe Thunderstorm Warning | LSX | 28 min |
| May 7, 12:53 AM CDT | Tornado Watch | SPC | 7 hr |
| May 7, 2:29 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 7, 3:27 AM CDT | Severe Thunderstorm Warning | LSX | 63 min |
| May 7, 3:49 AM CDT | Tornado Warning | LSX | 26 min |
| May 7, 4:20 AM CDT | Severe Thunderstorm Warning | LSX | 40 min |
| May 8, 3:01 AM CDT | Flood Watch | LSX | 19 hr |
| May 8, 8:58 AM CDT | Mesoscale Discussion | SPC | 92 min |
| May 8, 10:29 AM CDT | Tornado Watch | SPC | 8 hr |
| May 8, 11:28 AM CDT | Mesoscale Discussion | SPC | 92 min |
| May 8, 11:35 AM CDT | Tornado Warning | LSX | 40 min |
| May 8, 11:35 AM CDT | Mesoscale Discussion | SPC | 85 min |
| May 8, 12:11 PM CDT | Tornado Warning | LSX | 49 min |
| May 8, 12:20 PM CDT | Areal Flood Advisory | LSX | 28 min |
| May 8, 12:48 PM CDT | Flash Flood Warning | LSX | 3 hr |
| May 8, 1:21 PM CDT | River Flood Warning | LSX | 33 hr |
| May 8, 1:29 PM CDT | Severe Thunderstorm Warning | LSX | 61 min |
| May 8, 1:36 PM CDT | Tornado Warning | LSX | 39 min |
| May 8, 4:35 PM CDT | Severe Thunderstorm Warning | LSX | 40 min |
| May 8, 4:42 PM CDT | Tornado Watch | SPC | 9 hr |
| May 8, 4:54 PM CDT | Severe Thunderstorm Warning | LSX | 51 min |
| May 8, 5:30 PM CDT | Severe Thunderstorm Warning | LSX | 45 min |
| May 8, 6:05 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| May 8, 6:12 PM CDT | Severe Thunderstorm Warning | LSX | 63 min |
| May 21, 5:56 PM CDT | Tornado Watch | SPC | 6 hr |
| May 24, 2:39 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| May 24, 6:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| May 24, 8:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 24, 10:14 PM CDT | Severe Thunderstorm Warning | LSX | 46 min |
| May 25, 2:06 PM CDT | Flood Watch | LSX | 32 hr |
| May 25, 11:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| May 26, 1:03 AM CDT | Mesoscale Discussion | SPC | 117 min |
| May 26, 2:35 AM CDT | Tornado Watch | SPC | 7 hr |
| May 26, 2:38 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 26, 2:46 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 26, 4:01 PM CDT | Tornado Watch | SPC | 7 hr |
| May 26, 5:49 PM CDT | Severe Thunderstorm Warning | LSX | 41 min |
| May 26, 6:16 PM CDT | Severe Thunderstorm Warning | LSX | 44 min |
| May 26, 6:44 PM CDT | Severe Thunderstorm Warning | LSX | 46 min |
| Jun 8, 2:39 AM CDT | Flood Watch | LSX | 31 hr |
| Jun 8, 5:26 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 24, 2:59 AM CDT | Heat Advisory | LSX | 40 hr |
| Jun 25, 5:43 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 26, 1:50 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 2:22 PM CDT | Heat Advisory | LSX | 29 hr |
| Jul 3, 2:23 PM CDT | Flood Watch | LSX | 37 hr |
| Jul 8, 2:37 AM CDT | Flood Watch | LSX | 48 hr |
| Jul 9, 10:30 AM CDT | River Flood Warning | LSX | 43 hr |
| Jul 9, 11:03 AM CDT | Areal Flood Advisory | LSX | 6 hr |
| Jul 9, 11:07 AM CDT | Areal Flood Advisory | LSX | 6 hr |
| Jul 13, 2:29 PM CDT | Heat Advisory | LSX | 68 hr |
| Jul 16, 2:17 AM CDT | Flood Watch | LSX | 29 hr |
| Jul 16, 8:45 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 16, 9:47 AM CDT | Areal Flood Advisory | LSX | 3 hr |
| Jul 16, 12:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 16, 12:31 PM CDT | Flash Flood Warning | LSX | 3 hr |
| Jul 28, 3:27 AM CDT | Heat Advisory | LSX | 5 days |
| Jul 30, 1:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 2:58 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 13, 9:41 PM CDT | Flood Watch | LSX | 17 hr |
| Aug 15, 4:01 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 15, 8:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Oct 14, 2:13 PM CDT | Freeze Warning | LSX | 43 hr |
| Nov 4, 8:41 AM CST | Areal Flood Advisory | LSX | 50 min |
| Nov 4, 9:31 AM CST | Flash Flood Warning | LSX | 7 hr |
| Nov 4, 12:27 PM CST | Flash Flood Warning | LSX | 3 hr |
| Nov 4, 4:26 PM CST | Areal Flood Advisory | LSX | 4 hr |
| Nov 4, 7:43 PM CST | Flood Watch | LSX | 16 hr |
| Nov 4, 9:49 PM CST | Severe Thunderstorm Warning | LSX | 41 min |
| Nov 5, 1:20 AM CST | Areal Flood Advisory | LSX | 3 hr |
| Nov 5, 1:26 AM CST | Flash Flood Warning | LSX | 5 hr |
| Nov 5, 3:13 AM CST | Flash Flood Warning | LSX | 3 hr |
| Nov 5, 4:36 AM CST | River Flood Warning | LSX | 3 days |
| Nov 5, 6:25 AM CST | Areal Flood Warning | LSX | 8 hr |
| Nov 14, 12:39 PM CST | Dense Fog Advisory | LSX | 20 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 | 23 |
| Tornado Warning | 7 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 9 |
| Mesoscale Discussion | 28 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 6 |
| River Flood Warning | 4 |
| Flood Watch | 8 |
| Areal Flood Advisory | 8 |
| Winter | |
| Winter Weather Advisory | 4 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.