Alert archive / Mississippi / Harrison County
Weather alerts in Harrison County, Mississippi, 2015
131 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Harrison County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 131
- Warnings
- 36
- Watches
- 10
- Advisories
- 8
- Busiest month
- April33 alerts
- Busiest day
- April 25, 20158 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 1 tornado warnings covering Harrison County in 2015 had a tornado report inside them.
Harrison County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 10 | 7 | 30% | 12 | 42% | 21 min |
| Flash flood warnings | 9 | 3 | 67% | 5 | 80% | 59 min |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS New Orleans, LA: tornado warnings | 70 | 9 | 87% | 30 | 43% | 7 min |
| NWS New Orleans, LA: severe thunderstorm warnings | 165 | 49 | 70% | 141 | 65% | 18 min |
| NWS New Orleans, LA: flash flood warnings | 35 | 15 | 57% | 34 | 94% | 69 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 3, 12:00 PM CST | Mesoscale Discussion | SPC | 90 min |
| Jan 3, 11:47 PM CST | Special Weather Statement | LIX | 58 min |
| Jan 23, 12:43 PM CST | River Flood Warning | LIX | 65 hr |
| Feb 18, 11:35 AM CST | Red Flag Warning | LIX | 6 hr |
| Mar 9, 5:45 PM CDT | Areal Flood Advisory | LIX | 2 hr |
| Mar 9, 7:34 PM CDT | Areal Flood Advisory | LIX | 56 min |
| Mar 9, 7:48 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 10, 11:20 AM CDT | River Flood Warning | LIX | 45 hr |
| Mar 10, 2:56 PM CDT | Areal Flood Advisory | LIX | 3 hr |
| Mar 13, 1:08 AM CDT | Special Weather Statement | LIX | 22 min |
| Mar 13, 4:07 AM CDT | Areal Flood Advisory | LIX | 4 hr |
| Mar 13, 9:44 PM CDT | River Flood Warning | LIX | 15 hr |
| Mar 26, 11:19 AM CDT | Special Weather Statement | LIX | 41 min |
| Apr 6, 1:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Apr 7, 5:48 AM CDT | Special Weather Statement | LIX | 72 min |
| Apr 10, 12:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Apr 10, 3:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 12, 5:17 PM CDT | Special Weather Statement | LIX | 28 min |
| Apr 12, 6:20 PM CDT | Special Weather Statement | LIX | 25 min |
| Apr 12, 7:10 PM CDT | Areal Flood Advisory | LIX | 2 hr |
| Apr 12, 7:50 PM CDT | Flash Flood Warning | LIX | 4 hr |
| Apr 13, 7:59 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 13, 11:52 AM CDT | Special Weather Statement | LIX | 53 min |
| Apr 13, 12:47 PM CDT | Special Weather Statement | LIX | 28 min |
| Apr 14, 7:54 AM CDT | Areal Flood Advisory | LIX | 2 hr |
| Apr 14, 9:51 AM CDT | Special Weather Statement | LIX | 54 min |
| Apr 14, 10:32 AM CDT | Special Weather Statement | LIX | 58 min |
| Apr 14, 10:39 AM CDT | River Flood Warning | LIX | 5 days |
| Apr 14, 10:41 AM CDT | River Flood Warning | LIX | 5 days |
| Apr 14, 10:45 AM CDT | Flash Flood Warning | LIX | 3 hr |
| Apr 14, 5:57 PM CDT | River Flood Warning | LIX | 37 hr |
| Apr 15, 1:04 PM CDT | Flash Flood Warning | LIX | 3 hr |
| Apr 15, 2:06 PM CDT | Flash Flood Warning | LIX | 3 hr |
| Apr 15, 3:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 19, 2:06 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Apr 25, 9:35 AM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 25, 10:41 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 25, 1:11 PM CDT | Severe Thunderstorm Warning | LIX | 34 min |
| Apr 25, 1:35 PM CDT | Special Weather Statement | LIX | 40 min |
| Apr 25, 1:46 PM CDT | Severe Thunderstorm Warning | LIX | 44 min |
| Apr 25, 1:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Apr 25, 2:11 PM CDT | Severe Thunderstorm Warning | LIX | 22 min |
| Apr 25, 2:29 PM CDT | Severe Thunderstorm Warning | LIX | 31 min |
| Apr 27, 6:01 AM CDT | Tornado Watch | SPC | 7 hr |
| Apr 27, 9:47 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Apr 27, 11:02 AM CDT | Special Weather Statement | LIX | 58 min |
| May 11, 12:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 12, 1:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 16, 10:14 AM CDT | Special Weather Statement | LIX | 61 min |
| May 16, 12:44 PM CDT | Special Weather Statement | LIX | 46 min |
| May 16, 12:59 PM CDT | Areal Flood Advisory | LIX | 3 hr |
| May 16, 7:32 PM CDT | Areal Flood Advisory | LIX | 118 min |
| May 16, 8:03 PM CDT | Flash Flood Warning | LIX | 3 hr |
| May 16, 9:26 PM CDT | River Flood Warning | LIX | 65 hr |
| May 16, 9:26 PM CDT | River Flood Warning | LIX | 38 hr |
| May 16, 11:03 PM CDT | Flash Flood Warning | LIX | 8 hr |
| May 16, 11:52 PM CDT | Flash Flood Warning | LIX | 3 hr |
| May 17, 4:39 AM CDT | River Flood Warning | LIX | 51 hr |
| May 17, 10:38 AM CDT | River Flood Warning | LIX | 7 days |
| May 20, 2:26 PM CDT | Special Weather Statement | LIX | 34 min |
| May 20, 3:02 PM CDT | Special Weather Statement | LIX | 28 min |
| May 21, 4:24 PM CDT | Special Weather Statement | LIX | 36 min |
| May 21, 5:05 PM CDT | Flash Flood Warning | LIX | 115 min |
| May 21, 9:51 PM CDT | River Flood Warning | LIX | 34 hr |
| May 22, 8:22 AM CDT | River Flood Warning | LIX | 31 hr |
| May 24, 1:49 PM CDT | Tornado Watch | SPC | 8 hr |
| May 24, 5:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| May 24, 6:59 PM CDT | Special Weather Statement | LIX | 31 min |
| May 24, 7:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 25, 2:38 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 25, 12:19 PM CDT | River Flood Warning | LIX | 44 hr |
| May 25, 9:46 PM CDT | Special Weather Statement | LIX | 89 min |
| May 25, 10:37 PM CDT | Tornado Watch | SPC | 6 hr |
| May 26, 3:50 AM CDT | Mesoscale Discussion | SPC | 85 min |
| May 27, 11:51 AM CDT | Mesoscale Discussion | SPC | 54 min |
| May 28, 2:58 PM CDT | Special Weather Statement | LIX | 47 min |
| Jun 12, 2:09 PM CDT | Special Weather Statement | LIX | 36 min |
| Jun 14, 12:49 PM CDT | Special Weather Statement | LIX | 41 min |
| Jun 21, 6:34 PM CDT | Special Weather Statement | LIX | 41 min |
| Jun 23, 2:13 PM CDT | Special Weather Statement | LIX | 62 min |
| Jun 23, 2:20 PM CDT | Severe Thunderstorm Warning | LIX | 25 min |
| Jun 24, 3:45 PM CDT | Severe Thunderstorm Warning | LIX | 45 min |
| Jun 29, 1:45 PM CDT | Special Weather Statement | LIX | 30 min |
| Jun 29, 2:42 PM CDT | Special Weather Statement | LIX | 33 min |
| Jun 30, 11:38 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 1, 3:11 PM CDT | Special Weather Statement | LIX | 64 min |
| Jul 5, 10:54 AM CDT | Special Weather Statement | LIX | 36 min |
| Jul 19, 4:52 PM CDT | Special Weather Statement | LIX | 53 min |
| Jul 20, 1:43 PM CDT | Special Weather Statement | LIX | 62 min |
| Jul 25, 2:14 PM CDT | Special Weather Statement | LIX | 46 min |
| Jul 26, 5:49 PM CDT | Special Weather Statement | LIX | 26 min |
| Jul 29, 3:36 PM CDT | Special Weather Statement | LIX | 69 min |
| Jul 29, 4:42 PM CDT | Special Weather Statement | LIX | 33 min |
| Jul 30, 5:30 PM CDT | Special Weather Statement | LIX | 30 min |
| Jul 30, 7:37 PM CDT | Special Weather Statement | LIX | 23 min |
| Jul 30, 8:02 PM CDT | Special Weather Statement | LIX | 43 min |
| Aug 8, 5:02 PM CDT | Severe Thunderstorm Warning | LIX | 58 min |
| Aug 8, 8:18 PM CDT | Special Weather Statement | LIX | 27 min |
| Aug 8, 8:50 PM CDT | Severe Thunderstorm Warning | LIX | 40 min |
| Aug 20, 2:38 PM CDT | Special Weather Statement | LIX | 37 min |
| Sep 5, 4:15 PM CDT | Special Weather Statement | LIX | 60 min |
| Sep 5, 5:11 PM CDT | Severe Thunderstorm Warning | LIX | 49 min |
| Sep 5, 5:54 PM CDT | Severe Thunderstorm Warning | LIX | 66 min |
| Sep 6, 3:12 PM CDT | Special Weather Statement | LIX | 33 min |
| Sep 10, 1:54 PM CDT | Flash Flood Warning | LIX | 3 hr |
| Sep 27, 5:58 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 15, 2:48 PM CDT | Fire Weather Watch | LIX | 3 days |
| Oct 25, 7:12 PM CDT | Tornado Watch | SPC | 7 hr |
| Oct 25, 10:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 26, 12:43 AM CDT | Special Weather Statement | LIX | 77 min |
| Oct 26, 1:32 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Oct 26, 2:05 AM CDT | Tornado Watch | SPC | 7 hr |
| Oct 31, 11:45 AM CDT | Tornado Watch | SPC | 8 hr |
| Nov 18, 1:14 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Nov 18, 2:49 AM CST | Tornado Watch | SPC | 6 hr |
| Nov 18, 5:21 AM CST | Mesoscale Discussion | SPC | 114 min |
| Nov 18, 5:39 AM CST | Special Weather Statement | LIX | 66 min |
| Dec 13, 7:55 PM CST | Special Weather Statement | LIX | 2 hr |
| Dec 13, 10:00 PM CST | Special Weather Statement | LIX | 3 hr |
| Dec 13, 11:12 PM CST | Special Weather Statement | LIX | 93 min |
| Dec 16, 4:50 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 21, 5:47 PM CST | Mesoscale Discussion | SPC | 118 min |
| Dec 21, 8:16 PM CST | Special Weather Statement | LIX | 74 min |
| Dec 22, 4:47 PM CST | River Flood Warning | LIX | 4 days |
| Dec 24, 8:55 AM CST | Special Weather Statement | LIX | 65 min |
| Dec 25, 9:43 AM CST | River Flood Warning | LIX | 20 hr |
| Dec 28, 2:03 AM CST | Mesoscale Discussion | SPC | 117 min |
| Dec 28, 2:23 AM CST | Tornado Watch | SPC | 8 hr |
| Dec 28, 5:14 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 28, 5:31 AM CST | Special Weather Statement | LIX | 59 min |
| Dec 28, 6:31 AM CST | Tornado Warning | LIX | 29 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 archive20142016
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.