Alert archive / Mississippi / Calhoun County
Weather alerts in Calhoun County, Mississippi, 2020
113 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Calhoun County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 113
- Warnings
- 22
- Watches
- 20
- Advisories
- 34
- Busiest month
- June19 alerts
- Busiest day
- April 12, 20206 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Calhoun County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 11 | 8 | 27% | 7 | 71% | 24 min |
| Flash flood warnings | 3 | 1 | 67% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Memphis, TN: tornado warnings | 65 | 20 | 69% | 47 | 72% | 10 min |
| NWS Memphis, TN: severe thunderstorm warnings | 221 | 133 | 40% | 420 | 80% | 25 min |
| NWS Memphis, TN: flash flood warnings | 36 | 17 | 53% | 41 | 73% | 73 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, 3:14 AM CST | Flood Watch | MEG | 57 hr |
| Jan 9, 3:49 PM CST | Flash Flood Watch | MEG | 47 hr |
| Jan 10, 3:26 AM CST | Wind Advisory | MEG | 31 hr |
| Jan 11, 4:17 AM CST | Tornado Watch | SPC | 6 hr |
| Jan 11, 4:55 AM CST | Severe Thunderstorm Warning | MEG | 50 min |
| Jan 11, 5:19 AM CST | Severe Thunderstorm Warning | MEG | 41 min |
| Jan 11, 5:57 AM CST | Severe Thunderstorm Warning | MEG | 48 min |
| Jan 11, 9:17 AM CST | Flash Flood Warning | MEG | 4 hr |
| Jan 12, 12:18 AM CST | River Flood Warning | MEG | 10 hr |
| Jan 14, 3:40 AM CST | Flash Flood Watch | MEG | 8 hr |
| Jan 14, 4:26 AM CST | Areal Flood Advisory | MEG | 4 hr |
| Jan 14, 6:35 AM CST | Areal Flood Advisory | MEG | 3 hr |
| Jan 14, 10:22 AM CST | River Flood Warning | MEG | 9 hr |
| Feb 5, 4:15 PM CST | Severe Thunderstorm Warning | MEG | 45 min |
| Feb 5, 4:25 PM CST | Tornado Watch | SPC | 5 hr |
| Feb 9, 3:05 AM CST | Flood Watch | MEG | 4 days |
| Feb 10, 2:09 AM CST | Severe Thunderstorm Warning | MEG | 27 min |
| Feb 10, 10:04 AM CST | Areal Flood Advisory | MEG | 3 hr |
| Feb 10, 10:12 AM CST | River Flood Warning | MEG | 29 hr |
| Feb 10, 12:54 PM CST | Areal Flood Advisory | MEG | 3 hr |
| Feb 10, 3:41 PM CST | Areal Flood Warning | MEG | 6 hr |
| Feb 10, 9:37 PM CST | Areal Flood Warning | MEG | 8 hr |
| Feb 11, 2:30 PM CST | Areal Flood Warning | MEG | 6 hr |
| Feb 11, 8:03 PM CST | River Flood Warning | MEG | 14 hr |
| Feb 12, 1:46 PM CST | Mesoscale Discussion | SPC | 119 min |
| Feb 12, 3:15 PM CST | Special Weather Statement | MEG | 45 min |
| Feb 18, 11:44 AM CST | Areal Flood Advisory | MEG | 2 hr |
| Mar 3, 2:52 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 11, 12:26 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 11, 12:44 PM CDT | Special Weather Statement | MEG | 46 min |
| Mar 11, 1:29 PM CDT | Special Weather Statement | MEG | 46 min |
| Mar 11, 2:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Mar 22, 11:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 24, 2:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Mar 24, 3:06 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 28, 8:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Mar 28, 9:58 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 28, 11:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Apr 9, 3:50 AM CDT | Severe Thunderstorm Warning | MEG | 40 min |
| Apr 12, 3:56 AM CDT | Flash Flood Watch | MEG | 20 hr |
| Apr 12, 3:57 AM CDT | Wind Advisory | MEG | 26 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, 10:54 AM CDT | River Flood Warning | MEG | 18 hr |
| Apr 12, 5:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 12, 8:19 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 12, 9:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 12, 10:13 PM CDT | Severe Thunderstorm Warning | MEG | 47 min |
| Apr 13, 6:06 PM CDT | Frost Advisory | MEG | 39 hr |
| Apr 19, 2:34 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Apr 19, 4:23 AM CDT | Special Weather Statement | MEG | 52 min |
| Apr 22, 2:42 PM CDT | Flash Flood Watch | MEG | 13 hr |
| Apr 29, 2:08 AM CDT | Special Weather Statement | MEG | 67 min |
| May 7, 3:19 PM CDT | Wind Advisory | MEG | 28 hr |
| May 17, 12:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 17, 5:49 PM CDT | Special Weather Statement | MEG | 41 min |
| May 17, 5:59 PM CDT | Areal Flood Advisory | MEG | 3 hr |
| May 23, 7:12 AM CDT | Special Weather Statement | MEG | 48 min |
| May 27, 4:58 PM CDT | Special Weather Statement | MEG | 32 min |
| May 28, 12:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| May 28, 2:56 PM CDT | Special Weather Statement | MEG | 34 min |
| Jun 3, 7:46 PM CDT | Special Weather Statement | MEG | 29 min |
| Jun 4, 1:16 PM CDT | Special Weather Statement | MEG | 44 min |
| Jun 4, 2:17 PM CDT | Special Weather Statement | MEG | 43 min |
| Jun 5, 11:03 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 5, 2:47 PM CDT | Severe Thunderstorm Warning | MEG | 28 min |
| Jun 5, 3:14 PM CDT | Severe Thunderstorm Warning | MEG | 46 min |
| Jun 5, 4:14 PM CDT | Special Weather Statement | MEG | 16 min |
| Jun 7, 2:38 AM CDT | Flash Flood Watch | MEG | 50 hr |
| Jun 7, 3:00 PM CDT | Wind Advisory | MEG | 52 hr |
| Jun 8, 1:09 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 8, 5:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 8, 5:46 PM CDT | Areal Flood Advisory | MEG | 59 min |
| Jun 8, 6:52 PM CDT | Areal Flood Advisory | MEG | 113 min |
| Jun 9, 7:00 AM CDT | Areal Flood Advisory | MEG | 3 hr |
| Jun 23, 12:01 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 5:56 AM CDT | Areal Flood Advisory | MEG | 2 hr |
| Jun 24, 1:02 PM CDT | Areal Flood Advisory | MEG | 118 min |
| Jun 24, 1:50 PM CDT | Flash Flood Warning | MEG | 103 min |
| Jun 25, 3:49 AM CDT | Dense Fog Advisory | MEG | 4 hr |
| Jul 1, 11:26 AM CDT | Flash Flood Watch | MEG | 17 hr |
| Jul 1, 5:53 PM CDT | Special Weather Statement | MEG | 37 min |
| Jul 1, 6:27 PM CDT | Areal Flood Advisory | MEG | 3 hr |
| Jul 2, 10:22 AM CDT | Areal Flood Advisory | MEG | 113 min |
| Jul 9, 5:52 PM CDT | Areal Flood Advisory | MEG | 113 min |
| Jul 12, 7:02 AM CDT | Special Weather Statement | MEG | 13 min |
| Jul 12, 7:16 AM CDT | Special Weather Statement | MEG | 29 min |
| Jul 14, 2:47 PM CDT | Heat Advisory | MEG | 28 hr |
| Jul 15, 1:16 PM CDT | Special Weather Statement | MEG | 29 min |
| Jul 15, 2:23 PM CDT | Heat Advisory | MEG | 28 hr |
| Jul 20, 9:58 PM CDT | Special Weather Statement | MEG | 47 min |
| Jul 31, 12:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 31, 1:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 2, 1:21 AM CDT | Dense Fog Advisory | MEG | 8 hr |
| Aug 9, 3:29 PM CDT | Heat Advisory | MEG | 28 hr |
| Aug 22, 2:12 AM CDT | Dense Fog Advisory | MEG | 7 hr |
| Aug 23, 3:00 AM CDT | Dense Fog Advisory | MEG | 7 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, 10:31 AM CDT | Tornado Watch | SPC | 5 hr |
| Aug 28, 2:57 PM CDT | Severe Thunderstorm Warning | MEG | 18 min |
| Aug 28, 3:11 PM CDT | Severe Thunderstorm Warning | MEG | 19 min |
| Aug 28, 11:34 PM CDT | Areal Flood Advisory | MEG | 3 hr |
| Aug 29, 12:03 AM CDT | Flash Flood Warning | MEG | 3 hr |
| Aug 30, 1:39 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 30, 3:35 PM CDT | Areal Flood Advisory | MEG | 3 hr |
| Sep 12, 7:15 PM CDT | Areal Flood Advisory | MEG | 3 hr |
| Oct 9, 3:07 AM CDT | Flash Flood Watch | MEG | 36 hr |
| Oct 10, 3:17 AM CDT | Wind Advisory | MEG | 13 hr |
| Oct 23, 11:37 PM CDT | Areal Flood Advisory | MEG | 113 min |
| Nov 1, 1:50 PM CST | Frost Advisory | MEG | 19 hr |
| Nov 11, 5:32 AM CST | Dense Fog Advisory | MEG | 3 hr |
| Dec 20, 11:15 PM CST | Dense Fog Advisory | MEG | 10 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 | 11 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 7 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 18 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 3 |
| River Flood Warning | 5 |
| Flash Flood Watch | 7 |
| Flood Watch | 2 |
| Areal Flood Advisory | 18 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
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.