Alert archive / Mississippi / Bolivar County
Weather alerts in Bolivar County, Mississippi, 2021
130 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Bolivar County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 130
- Warnings
- 42
- Watches
- 20
- Advisories
- 25
- Busiest month
- March29 alerts
- Busiest day
- March 17, 202110 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 Bolivar County in 2021 had a tornado report inside them; 1 of 2 tornado reports fell inside a warning, on average 13 minutes after it went out.
Bolivar County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 1 | 80% | 2 | 50% | 13 min |
| Severe thunderstorm warnings | 11 | 3 | 73% | 16 | 94% | 56 min |
| Flash flood warnings | 10 | 4 | 60% | 4 | 100% | 45 min |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: tornado warnings | 62 | 22 | 65% | 76 | 61% | 21 min |
| NWS Jackson, MS: severe thunderstorm warnings | 296 | 169 | 43% | 530 | 86% | 28 min |
| NWS Jackson, MS: flash flood warnings | 110 | 66 | 40% | 199 | 83% | 83 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 10, 3:52 AM CST | Winter Weather Advisory | JAN | 32 hr |
| Jan 15, 4:01 AM CST | Wind Advisory | JAN | 14 hr |
| Feb 10, 4:28 AM CST | Winter Weather Advisory | JAN | 32 hr |
| Feb 10, 4:46 PM CST | Ice Storm Warning | JAN | 19 hr |
| Feb 11, 3:43 PM CST | Winter Weather Advisory | JAN | 20 hr |
| Feb 12, 4:09 PM CST | Winter Storm Watch | JAN | 23 hr |
| Feb 13, 3:13 PM CST | Winter Storm Warning | JAN | 48 hr |
| Feb 14, 9:09 PM CST | Hard Freeze Warning | JAN | 63 hr |
| Feb 14, 9:41 PM CST | Wind Chill Advisory | JAN | 35 hr |
| Feb 15, 5:57 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 16, 4:25 AM CST | Winter Storm Watch | JAN | 10 hr |
| Feb 16, 2:50 PM CST | Winter Storm Warning | JAN | 39 hr |
| Feb 17, 9:15 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 18, 6:25 AM CST | Winter Weather Advisory | JAN | 14 hr |
| Feb 18, 9:24 AM CST | Hard Freeze Warning | JAN | 27 hr |
| Feb 19, 3:45 AM CST | Hard Freeze Warning | JAN | 29 hr |
| Feb 26, 1:59 PM CST | Areal Flood Warning | JAN | 6 hr |
| Feb 26, 2:13 PM CST | Flash Flood Watch | JAN | 14 hr |
| Feb 27, 4:04 AM CST | Flash Flood Watch | JAN | 56 hr |
| Feb 28, 4:40 PM CST | Mesoscale Discussion | SPC | 95 min |
| Feb 28, 6:27 PM CST | Mesoscale Discussion | SPC | 93 min |
| Mar 1, 8:45 AM CST | Areal Flood Warning | JAN | 3 hr |
| Mar 17, 5:34 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Mar 17, 5:53 AM CDT | Tornado Watch | SPC | 7 hr |
| Mar 17, 6:05 AM CDT | Tornado Warning | JAN | 40 min |
| Mar 17, 6:44 AM CDT | Tornado Warning | JAN | 19 min |
| Mar 17, 12:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Mar 17, 12:57 PM CDT | Tornado Watch | SPC | 6 hr |
| Mar 17, 2:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Mar 17, 4:45 PM CDT | Severe Thunderstorm Warning | JAN | 60 min |
| Mar 17, 4:56 PM CDT | Tornado Warning | JAN | 29 min |
| Mar 17, 6:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Mar 19, 11:13 AM CDT | River Flood Advisory | JAN | 6 days |
| Mar 22, 2:25 PM CDT | Wind Advisory | JAN | 23 hr |
| Mar 24, 12:10 PM CDT | Wind Advisory | JAN | 26 hr |
| Mar 25, 11:46 AM CDT | River Flood Warning | JAN | 12 days |
| Mar 27, 3:25 PM CDT | Tornado Watch | SPC | 10 hr |
| Mar 27, 9:01 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 27, 9:36 PM CDT | Tornado Warning | JAN | 36 min |
| Mar 27, 10:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Mar 27, 10:59 PM CDT | Severe Thunderstorm Warning | JAN | 61 min |
| Mar 27, 11:31 PM CDT | Tornado Warning | JAN | 44 min |
| Mar 28, 12:11 AM CDT | Severe Thunderstorm Warning | JAN | 27 min |
| Mar 30, 5:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Mar 30, 9:55 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 2:57 AM CDT | Wind Advisory | JAN | 17 hr |
| Mar 31, 3:48 AM CDT | Special Weather Statement | JAN | 42 min |
| Mar 31, 4:06 AM CDT | Special Weather Statement | JAN | 24 min |
| Mar 31, 2:26 PM CDT | Freeze Watch | JAN | 20 hr |
| Apr 1, 10:41 AM CDT | Freeze Warning | JAN | 22 hr |
| Apr 8, 10:54 AM CDT | River Flood Warning | JAN | 50 hr |
| Apr 9, 1:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Apr 9, 3:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Apr 9, 3:42 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 9, 4:55 PM CDT | Severe Thunderstorm Warning | JAN | 95 min |
| Apr 10, 9:15 PM CDT | River Flood Warning | JAN | 14 hr |
| May 2, 4:46 PM CDT | Tornado Watch | SPC | 5 hr |
| May 4, 10:52 AM CDT | Tornado Watch | SPC | 7 hr |
| May 4, 12:18 PM CDT | Severe Thunderstorm Warning | JAN | 72 min |
| May 9, 12:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| May 9, 1:14 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 9, 3:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 9, 5:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 9, 7:32 PM CDT | Severe Thunderstorm Warning | JAN | 73 min |
| May 28, 2:42 AM CDT | Special Weather Statement | JAN | 48 min |
| Jun 7, 5:09 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 7, 5:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 7, 6:23 PM CDT | Severe Thunderstorm Warning | JAN | 55 min |
| Jun 8, 4:21 AM CDT | Flash Flood Watch | JAN | 17 hr |
| Jun 8, 7:28 AM CDT | Flash Flood Warning | JAN | 5 hr |
| Jun 8, 9:41 AM CDT | Flash Flood Warning | JAN | 2 hr |
| Jun 8, 11:53 AM CDT | Flash Flood Warning | JAN | 3 hr |
| Jun 8, 12:42 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 8, 2:38 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Jun 8, 3:06 PM CDT | Special Weather Statement | JAN | 39 min |
| Jun 8, 3:12 PM CDT | Severe Thunderstorm Warning | JAN | 63 min |
| Jun 8, 4:39 PM CDT | Flash Flood Warning | JAN | 2 hr |
| Jun 8, 11:12 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Jun 9, 4:03 AM CDT | Flash Flood Watch | JAN | 39 hr |
| Jun 9, 11:50 AM CDT | Flash Flood Warning | JAN | 3 hr |
| Jun 9, 12:06 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 2:01 PM CDT | Flash Flood Warning | JAN | 3 hr |
| Jun 10, 10:33 AM CDT | Flash Flood Warning | JAN | 3 hr |
| Jun 10, 6:10 PM CDT | Areal Flood Warning | JAN | 2 hr |
| Jun 10, 8:11 PM CDT | Areal Flood Warning | JAN | 12 hr |
| Jun 13, 4:01 PM CDT | Severe Thunderstorm Warning | JAN | 29 min |
| Jun 13, 4:31 PM CDT | Severe Thunderstorm Warning | JAN | 44 min |
| Jul 11, 2:52 AM CDT | Special Weather Statement | JAN | 38 min |
| Jul 18, 1:04 PM CDT | Special Weather Statement | JAN | 56 min |
| Jul 18, 2:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 2:40 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 24, 2:55 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 25, 2:32 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 26, 2:54 PM CDT | Heat Advisory | JAN | 28 hr |
| Jul 27, 2:54 PM CDT | Excessive Heat Warning | JAN | 4 days |
| Jul 27, 2:54 PM CDT | Heat Advisory | JAN | 5 days |
| Aug 9, 3:22 AM CDT | Heat Advisory | JAN | 16 hr |
| Aug 9, 2:26 PM CDT | Heat Advisory | JAN | 3 days |
| Aug 13, 6:19 PM CDT | Special Weather Statement | JAN | 26 min |
| Aug 18, 9:47 PM CDT | Special Weather Statement | JAN | 43 min |
| Aug 19, 6:38 PM CDT | Special Weather Statement | JAN | 52 min |
| Aug 20, 3:05 PM CDT | Heat Advisory | JAN | 3 days |
| Aug 22, 2:29 PM CDT | Excessive Heat Warning | JAN | 53 hr |
| Aug 24, 3:01 PM CDT | Heat Advisory | JAN | 28 hr |
| Aug 25, 3:10 PM CDT | Heat Advisory | JAN | 28 hr |
| Aug 28, 3:36 AM CDT | Flash Flood Watch | JAN | 66 hr |
| Aug 29, 4:00 PM CDT | Wind Advisory | JAN | 30 hr |
| Aug 29, 4:08 PM CDT | Special Weather Statement | JAN | 67 min |
| Sep 1, 4:08 AM CDT | Heat Advisory | JAN | 15 hr |
| Sep 5, 3:18 PM CDT | Special Weather Statement | JAN | 57 min |
| Sep 17, 7:48 PM CDT | Special Weather Statement | JAN | 57 min |
| Sep 19, 8:15 AM CDT | Flash Flood Warning | JAN | 2 hr |
| Sep 21, 11:51 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 21, 2:47 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 5, 12:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 6, 10:16 PM CDT | Dense Fog Advisory | JAN | 13 hr |
| Dec 2, 2:51 AM CST | Dense Fog Advisory | JAN | 6 hr |
| Dec 4, 3:02 PM CST | Dense Fog Advisory | JAN | 18 hr |
| Dec 6, 6:59 AM CST | Special Weather Statement | JAN | 31 min |
| Dec 10, 10:00 PM CST | Mesoscale Discussion | SPC | 90 min |
| Dec 10, 10:09 PM CST | Mesoscale Discussion | SPC | 96 min |
| Dec 10, 10:44 PM CST | Tornado Watch | SPC | 6 hr |
| Dec 11, 2:00 AM CST | Mesoscale Discussion | SPC | 90 min |
| Dec 11, 2:02 AM CST | Special Weather Statement | JAN | 58 min |
| Dec 16, 2:08 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Dec 29, 10:44 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 29, 12:05 PM CST | Tornado Watch | SPC | 7 hr |
| Dec 29, 1:18 PM CST | Mesoscale Discussion | SPC | 87 min |
| Dec 29, 3:39 PM CST | Severe Thunderstorm Warning | JAN | 48 min |
| Dec 29, 3:41 PM CST | Mesoscale Discussion | SPC | 64 min |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.