Alert archive / Mississippi / Walthall County
Weather alerts in Walthall County, Mississippi, 2018
102 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Walthall County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 102
- Warnings
- 25
- Watches
- 12
- Advisories
- 25
- Busiest month
- April22 alerts
- Busiest day
- April 14, 20189 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 5 tornado warnings covering Walthall County in 2018 had a tornado report inside them.
Walthall County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 1 | 80% | 0 | ||
| Severe thunderstorm warnings | 5 | 2 | 60% | 3 | 67% | 20 min |
| Flash flood warnings | 2 | 2 | 0% | 2 | 100% | 281 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS New Orleans, LA: tornado warnings | 43 | 4 | 91% | 24 | 38% | 20 min |
| NWS New Orleans, LA: severe thunderstorm warnings | 126 | 37 | 71% | 102 | 58% | 21 min |
| NWS New Orleans, LA: flash flood warnings | 19 | 13 | 32% | 26 | 85% | 130 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, 3:35 AM CST | Hard Freeze Warning | LIX | 51 hr |
| Jan 1, 3:45 AM CST | Wind Chill Advisory | LIX | 29 hr |
| Jan 2, 3:52 PM CST | Hard Freeze Warning | LIX | 43 hr |
| Jan 3, 3:39 PM CST | Hard Freeze Warning | LIX | 42 hr |
| Jan 7, 4:37 AM CST | Flash Flood Watch | LIX | 31 hr |
| Jan 9, 8:57 PM CST | Dense Fog Advisory | LIX | 12 hr |
| Jan 12, 4:04 PM CST | Hard Freeze Watch | LIX | 12 hr |
| Jan 13, 3:46 AM CST | Hard Freeze Warning | LIX | 12 hr |
| Jan 13, 3:34 PM CST | Hard Freeze Warning | LIX | 18 hr |
| Jan 15, 3:49 PM CST | Hard Freeze Warning | LIX | 44 hr |
| Jan 15, 4:04 PM CST | Wind Chill Advisory | LIX | 45 hr |
| Jan 15, 4:04 PM CST | Winter Weather Advisory | LIX | 32 hr |
| Jan 16, 3:17 PM CST | Hard Freeze Warning | LIX | 44 hr |
| Jan 17, 4:45 PM CST | Wind Chill Advisory | LIX | 16 hr |
| Jan 18, 3:36 AM CST | Hard Freeze Warning | LIX | 30 hr |
| Jan 27, 4:33 AM CST | Flash Flood Watch | LIX | 11 hr |
| Jan 27, 1:21 PM CST | Areal Flood Advisory | LIX | 3 hr |
| Jan 27, 1:42 PM CST | Special Weather Statement | LIX | 48 min |
| Feb 7, 4:11 AM CST | Mesoscale Discussion | SPC | 3 hr |
| Feb 7, 7:42 AM CST | Special Weather Statement | LIX | 48 min |
| Feb 11, 10:27 AM CST | Special Weather Statement | LIX | 33 min |
| Feb 14, 4:01 PM CST | Dense Fog Advisory | LIX | 18 hr |
| Feb 23, 12:23 PM CST | Areal Flood Advisory | LIX | 112 min |
| Feb 24, 5:29 PM CST | Mesoscale Discussion | SPC | 91 min |
| Mar 1, 11:31 AM CST | Special Weather Statement | LIX | 59 min |
| Mar 29, 7:55 AM CDT | Special Weather Statement | LIX | 65 min |
| Apr 3, 9:06 PM CDT | Special Weather Statement | LIX | 54 min |
| Apr 3, 10:00 PM CDT | Special Weather Statement | LIX | 30 min |
| Apr 3, 10:30 PM CDT | Special Weather Statement | LIX | 30 min |
| Apr 3, 11:00 PM CDT | Special Weather Statement | LIX | 30 min |
| Apr 3, 11:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Apr 6, 8:12 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Apr 6, 8:53 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Apr 6, 10:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Apr 6, 11:44 PM CDT | Severe Thunderstorm Warning | LIX | 61 min |
| Apr 7, 12:52 AM CDT | Special Weather Statement | LIX | 38 min |
| Apr 7, 1:27 AM CDT | Tornado Warning | LIX | 18 min |
| Apr 13, 9:30 AM CDT | Flash Flood Watch | LIX | 40 hr |
| Apr 14, 6:37 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Apr 14, 6:57 AM CDT | Tornado Watch | SPC | 7 hr |
| Apr 14, 8:22 AM CDT | Tornado Warning | LIX | 38 min |
| Apr 14, 8:45 AM CDT | Severe Thunderstorm Warning | LIX | 45 min |
| Apr 14, 8:55 AM CDT | Tornado Warning | LIX | 35 min |
| Apr 14, 9:01 AM CDT | Tornado Warning | LIX | 29 min |
| Apr 14, 9:30 AM CDT | Severe Thunderstorm Warning | LIX | 45 min |
| Apr 14, 9:51 AM CDT | Areal Flood Advisory | LIX | 3 hr |
| Apr 14, 10:14 AM CDT | Areal Flood Advisory | LIX | 3 hr |
| Apr 22, 10:37 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 2:56 PM CDT | Special Weather Statement | LIX | 49 min |
| May 25, 10:41 AM CDT | Flash Flood Watch | LIX | 53 hr |
| May 25, 4:32 PM CDT | Special Weather Statement | LIX | 28 min |
| May 26, 4:17 PM CDT | Special Weather Statement | LIX | 28 min |
| May 26, 4:48 PM CDT | Special Weather Statement | LIX | 27 min |
| Jun 3, 3:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 28, 9:53 PM CDT | Special Weather Statement | LIX | 37 min |
| Jun 28, 10:59 PM CDT | Special Weather Statement | LIX | 61 min |
| Jul 2, 3:49 PM CDT | Special Weather Statement | LIX | 41 min |
| Jul 3, 12:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 6, 9:57 PM CDT | Special Weather Statement | LIX | 93 min |
| Jul 6, 10:35 PM CDT | Areal Flood Advisory | LIX | 115 min |
| Jul 6, 10:54 PM CDT | Areal Flood Advisory | LIX | 66 min |
| Jul 7, 6:14 PM CDT | Severe Thunderstorm Warning | LIX | 31 min |
| Jul 19, 3:31 PM CDT | Heat Advisory | LIX | 3 days |
| Aug 18, 4:14 PM CDT | Areal Flood Advisory | LIX | 2 hr |
| Aug 19, 2:35 PM CDT | Special Weather Statement | JAN | 25 min |
| Aug 28, 12:27 PM CDT | Special Weather Statement | LIX | 18 min |
| Aug 29, 2:30 PM CDT | Special Weather Statement | LIX | 45 min |
| Aug 29, 2:58 PM CDT | Areal Flood Advisory | LIX | 62 min |
| Aug 29, 3:23 PM CDT | Special Weather Statement | LIX | 37 min |
| Sep 3, 4:28 AM CDT | Tropical Storm Warning | LIX | 48 hr |
| Sep 3, 4:45 AM CDT | Flash Flood Watch | LIX | 59 hr |
| Oct 29, 3:30 PM CDT | Dense Fog Advisory | LIX | 20 hr |
| Oct 31, 10:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Oct 31, 11:07 PM CDT | Tornado Watch | SPC | 9 hr |
| Nov 1, 1:19 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Nov 1, 2:56 AM CDT | Severe Thunderstorm Warning | LIX | 34 min |
| Nov 1, 3:38 AM CDT | Tornado Warning | LIX | 37 min |
| Nov 1, 3:48 AM CDT | Special Weather Statement | LIX | 27 min |
| Nov 1, 4:30 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 4, 10:26 PM CST | Dense Fog Advisory | LIX | 10 hr |
| Nov 13, 3:36 PM CST | Freeze Watch | LIX | 15 hr |
| Nov 14, 6:07 AM CST | Freeze Warning | LIX | 27 hr |
| Nov 23, 9:58 PM CST | Dense Fog Advisory | LIX | 10 hr |
| Nov 24, 10:30 PM CST | Dense Fog Advisory | LIX | 10 hr |
| Nov 26, 4:42 AM CST | Freeze Warning | LIX | 27 hr |
| Dec 7, 10:11 AM CST | River Flood Warning | LIX | 3 days |
| Dec 14, 3:23 AM CST | Dense Fog Advisory | LIX | 6 hr |
| Dec 18, 3:47 AM CST | Dense Fog Advisory | LIX | 5 hr |
| Dec 19, 9:57 PM CST | Dense Fog Advisory | LIX | 9 hr |
| Dec 26, 3:20 PM CST | Flash Flood Watch | LIX | 45 hr |
| Dec 26, 7:05 PM CST | Special Weather Statement | LIX | 55 min |
| Dec 26, 8:06 PM CST | Special Weather Statement | LIX | 69 min |
| Dec 27, 9:29 AM CST | Tornado Watch | SPC | 9 hr |
| Dec 27, 10:20 AM CST | Wind Advisory | LIX | 6 hr |
| Dec 27, 1:50 PM CST | Mesoscale Discussion | SPC | 85 min |
| Dec 27, 2:56 PM CST | Areal Flood Advisory | LIX | 3 hr |
| Dec 27, 3:48 PM CST | Flash Flood Warning | LIX | 10 hr |
| Dec 27, 8:52 PM CST | River Flood Warning | LIX | 13 hr |
| Dec 27, 9:30 PM CST | Flash Flood Warning | LIX | 3 hr |
| Dec 30, 9:48 AM CST | Dense Fog Advisory | LIX | 17 hr |
| Dec 31, 7:02 AM CST | Mesoscale Discussion | SPC | 118 min |
| Dec 31, 2:13 PM CST | Special Weather Statement | LIX | 62 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 | 5 |
| Tornado Warning | 5 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 14 |
| Special Weather Statement | 26 |
| Flooding | |
| Flash Flood Warning | 2 |
| River Flood Warning | 2 |
| Flash Flood Watch | 6 |
| Areal Flood Advisory | 9 |
| Winter | |
| Winter Weather Advisory | 1 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Hard Freeze Warning | 8 |
| Freeze Watch | 1 |
| Hard Freeze Watch | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 10 |
| 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 archive20172019
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.