Alert archive / Texas / San Jacinto County
Weather alerts in San Jacinto County, Texas, 2009
158 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
San Jacinto County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 158
- Warnings
- 52
- Watches
- 26
- Advisories
- 32
- Busiest month
- April36 alerts
- Busiest day
- October 29, 200911 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 6 tornado warnings covering San Jacinto County in 2009 had a tornado report inside them.
San Jacinto County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 6 | 1 | 83% | 0 | ||
| Severe thunderstorm warnings | 28 | 7 | 75% | 2 | 100% | 26 min |
| Flash flood warnings | 5 | 3 | 40% | 1 | 100% | 79 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Houston/Galveston, TX: tornado warnings | 46 | 5 | 89% | 16 | 56% | 7 min |
| NWS Houston/Galveston, TX: severe thunderstorm warnings | 221 | 57 | 74% | 129 | 76% | 19 min |
| NWS Houston/Galveston, TX: flash flood warnings | 41 | 16 | 61% | 56 | 86% | 74 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 13, 9:35 AM CST | Red Flag Warning | HGX | 8 hr |
| Jan 18, 3:42 PM CST | Fire Weather Watch | HGX | 6 hr |
| Jan 18, 9:20 PM CST | Red Flag Warning | HGX | 21 hr |
| Jan 19, 7:04 AM CST | Fire Weather Watch | HGX | 22 hr |
| Jan 20, 5:27 AM CST | Red Flag Warning | HGX | 13 hr |
| Jan 27, 3:40 PM CST | Freezing Rain Advisory | HGX | 15 hr |
| Feb 1, 3:12 PM CST | Red Flag Warning | HGX | 24 hr |
| Feb 1, 10:30 PM CST | Mesoscale Discussion | SPC | 90 min |
| Feb 2, 12:12 AM CST | Severe Thunderstorm Warning | HGX | 63 min |
| Feb 2, 1:04 AM CST | Severe Thunderstorm Warning | HGX | 56 min |
| Feb 10, 9:30 PM CST | Tornado Watch | SPC | 7 hr |
| Feb 11, 12:46 AM CST | Severe Thunderstorm Warning | HGX | 44 min |
| Feb 11, 12:51 AM CST | Severe Thunderstorm Warning | HGX | 39 min |
| Feb 17, 3:49 PM CST | Fire Weather Watch | HGX | 13 hr |
| Feb 28, 2:57 PM CST | Red Flag Warning | HGX | 27 hr |
| Mar 16, 8:10 PM CDT | Dense Fog Advisory | HGX | 14 hr |
| Mar 17, 8:04 PM CDT | Dense Fog Advisory | HGX | 14 hr |
| Mar 18, 8:31 PM CDT | Dense Fog Advisory | HGX | 14 hr |
| Mar 19, 9:20 PM CDT | Dense Fog Advisory | HGX | 9 hr |
| Mar 25, 12:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Mar 25, 2:06 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 25, 3:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Mar 25, 5:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Mar 25, 7:31 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Mar 25, 7:40 PM CDT | Tornado Warning | HGX | 50 min |
| Mar 25, 8:25 PM CDT | Tornado Warning | HGX | 50 min |
| Mar 27, 10:24 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Mar 27, 11:48 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 27, 3:43 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Mar 27, 3:56 PM CDT | Severe Thunderstorm Warning | HGX | 34 min |
| Mar 27, 4:19 PM CDT | Tornado Warning | HGX | 26 min |
| Mar 27, 4:30 PM CDT | Severe Thunderstorm Warning | HGX | 30 min |
| Mar 27, 4:42 PM CDT | Tornado Warning | HGX | 33 min |
| Apr 1, 3:13 PM CDT | Fire Weather Watch | HGX | 17 hr |
| Apr 2, 1:32 AM CDT | Mesoscale Discussion | SPC | 58 min |
| Apr 2, 1:49 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 2, 4:42 AM CDT | Mesoscale Discussion | SPC | 63 min |
| Apr 2, 7:36 AM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 2, 7:47 AM CDT | Red Flag Warning | HGX | 11 hr |
| Apr 2, 11:19 AM CDT | Wind Advisory | HGX | 8 hr |
| Apr 5, 5:55 AM CDT | Wind Advisory | HGX | 13 hr |
| Apr 5, 7:16 PM CDT | Fire Weather Watch | HGX | 17 hr |
| Apr 6, 3:23 PM CDT | Freeze Warning | HGX | 18 hr |
| Apr 12, 4:37 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Apr 12, 7:39 AM CDT | Mesoscale Discussion | SPC | 66 min |
| Apr 12, 7:58 AM CDT | Tornado Watch | SPC | 8 hr |
| Apr 12, 9:27 AM CDT | Severe Thunderstorm Warning | HGX | 48 min |
| Apr 12, 9:46 AM CDT | Severe Thunderstorm Warning | HGX | 44 min |
| Apr 12, 10:42 AM CDT | Severe Thunderstorm Warning | HGX | 34 min |
| Apr 12, 11:39 AM CDT | Severe Thunderstorm Warning | HGX | 14 min |
| Apr 16, 5:55 PM CDT | Severe Thunderstorm Warning | HGX | 50 min |
| Apr 17, 9:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Apr 17, 10:24 AM CDT | Tornado Watch | SPC | 7 hr |
| Apr 17, 11:24 AM CDT | Flood Watch | HGX | 33 hr |
| Apr 17, 12:10 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 17, 1:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 18, 9:47 AM CDT | Mesoscale Discussion | SPC | 28 min |
| Apr 18, 9:53 AM CDT | Tornado Watch | SPC | 6 hr |
| Apr 18, 11:26 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 18, 12:15 PM CDT | Severe Thunderstorm Warning | HGX | 45 min |
| Apr 18, 1:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 18, 11:56 PM CDT | Dense Fog Advisory | HGX | 8 hr |
| Apr 24, 12:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Apr 27, 3:47 PM CDT | Flood Watch | HGX | 5 hr |
| Apr 27, 3:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Apr 27, 7:04 PM CDT | Areal Flood Advisory | HGX | 3 hr |
| Apr 28, 1:19 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Apr 28, 3:27 AM CDT | Flood Watch | HGX | 12 hr |
| Apr 28, 5:03 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 3, 5:12 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 3, 6:26 AM CDT | Severe Thunderstorm Warning | HGX | 64 min |
| May 3, 6:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 7:13 AM CDT | Severe Thunderstorm Warning | HGX | 62 min |
| May 3, 7:27 AM CDT | Severe Thunderstorm Warning | HGX | 33 min |
| May 3, 7:55 AM CDT | Areal Flood Advisory | HGX | 65 min |
| May 3, 8:10 AM CDT | Severe Thunderstorm Warning | HGX | 50 min |
| May 3, 9:38 AM CDT | Areal Flood Advisory | HGX | 57 min |
| May 3, 10:09 AM CDT | Flash Flood Warning | HGX | 3 hr |
| May 3, 8:03 PM CDT | River Flood Warning | HGX | 15 hr |
| May 11, 1:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 11, 3:27 PM CDT | Severe Thunderstorm Warning | HGX | 48 min |
| May 11, 4:45 PM CDT | Severe Thunderstorm Warning | HGX | 27 min |
| May 11, 5:08 PM CDT | Severe Thunderstorm Warning | HGX | 52 min |
| May 16, 7:06 PM CDT | Areal Flood Advisory | HGX | 54 min |
| May 24, 5:38 PM CDT | Flash Flood Warning | HGX | 112 min |
| Jun 3, 1:20 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jun 3, 5:18 PM CDT | Severe Thunderstorm Warning | HGX | 57 min |
| Jun 11, 5:22 AM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 11, 5:42 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 11, 7:55 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Jun 11, 10:10 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 24, 4:04 PM CDT | Heat Advisory | HGX | 5 days |
| Jun 30, 2:17 PM CDT | Areal Flood Advisory | HGX | 3 hr |
| Jul 4, 8:51 AM CDT | Heat Advisory | HGX | 34 hr |
| Jul 8, 9:08 PM CDT | Heat Advisory | HGX | 4 days |
| Jul 19, 2:36 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 19, 5:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 30, 6:40 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 31, 9:29 AM CDT | Flash Flood Warning | HGX | 61 min |
| Aug 4, 7:03 PM CDT | Heat Advisory | HGX | 3 days |
| Aug 12, 4:42 PM CDT | Severe Thunderstorm Warning | HGX | 48 min |
| Aug 12, 5:54 PM CDT | Severe Thunderstorm Warning | HGX | 28 min |
| Aug 21, 4:28 AM CDT | Heat Advisory | HGX | 40 hr |
| Aug 21, 6:45 PM CDT | Severe Thunderstorm Warning | HGX | 45 min |
| Aug 23, 2:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 23, 6:27 PM CDT | Severe Thunderstorm Warning | HGX | 33 min |
| Aug 23, 7:07 PM CDT | Severe Thunderstorm Warning | HGX | 29 min |
| Aug 26, 10:07 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 26, 10:47 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 26, 1:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Sep 3, 3:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 21, 5:10 PM CDT | Severe Thunderstorm Warning | HGX | 65 min |
| Sep 27, 1:06 AM CDT | Dense Fog Advisory | HGX | 8 hr |
| Sep 28, 1:14 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 1, 9:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Oct 1, 11:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Oct 21, 10:32 AM CDT | River Flood Warning | HGX | 21 days |
| Oct 22, 5:08 AM CDT | Areal Flood Advisory | HGX | 112 min |
| Oct 25, 3:43 PM CDT | Flash Flood Watch | HGX | 24 hr |
| Oct 26, 7:38 AM CDT | Areal Flood Advisory | HGX | 112 min |
| Oct 28, 5:15 AM CDT | Flash Flood Watch | HGX | 47 hr |
| Oct 29, 5:19 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Oct 29, 10:48 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Oct 29, 11:19 AM CDT | Wind Advisory | HGX | 9 hr |
| Oct 29, 1:14 PM CDT | Tornado Watch | SPC | 8 hr |
| Oct 29, 2:36 PM CDT | Severe Thunderstorm Warning | HGX | 39 min |
| Oct 29, 3:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Oct 29, 4:17 PM CDT | Severe Thunderstorm Warning | HGX | 43 min |
| Oct 29, 4:41 PM CDT | Flash Flood Warning | HGX | 3 hr |
| Oct 29, 5:04 PM CDT | Tornado Warning | HGX | 26 min |
| Oct 29, 5:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Oct 29, 6:48 PM CDT | Tornado Warning | HGX | 27 min |
| Oct 29, 7:06 PM CDT | Areal Flood Advisory | HGX | 114 min |
| Oct 29, 8:20 PM CDT | Flash Flood Warning | HGX | 3 hr |
| Oct 30, 6:02 AM CDT | River Flood Warning | HGX | 15 hr |
| Oct 30, 10:04 AM CDT | River Flood Warning | HGX | 35 hr |
| Nov 22, 8:56 PM CST | Dense Fog Advisory | HGX | 13 hr |
| Dec 3, 4:55 AM CST | Winter Storm Watch | HGX | 17 hr |
| Dec 3, 7:43 AM CST | Freeze Warning | HGX | 49 hr |
| Dec 3, 10:17 PM CST | Winter Storm Warning | HGX | 20 hr |
| Dec 4, 5:22 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 7, 1:16 AM CST | Dense Fog Advisory | HGX | 7 hr |
| Dec 8, 5:07 AM CST | Dense Fog Advisory | HGX | 5 hr |
| Dec 12, 3:30 PM CST | Dense Fog Advisory | HGX | 18 hr |
| Dec 13, 3:01 PM CST | Dense Fog Advisory | HGX | 19 hr |
| Dec 14, 2:56 PM CST | Dense Fog Advisory | HGX | 18 hr |
| Dec 15, 3:22 AM CST | Mesoscale Discussion | SPC | 83 min |
| Dec 23, 2:37 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 23, 1:03 PM CST | Mesoscale Discussion | SPC | 57 min |
| Dec 23, 1:59 PM CST | Tornado Watch | SPC | 7 hr |
| Dec 23, 5:21 PM CST | Mesoscale Discussion | SPC | 114 min |
| Dec 23, 7:50 PM CST | Mesoscale Discussion | SPC | 85 min |
| Dec 23, 8:48 PM CST | Tornado Watch | SPC | 9 hr |
| Dec 23, 9:32 PM CST | Wind Advisory | HGX | 30 hr |
| Dec 23, 11:05 PM CST | Areal Flood Advisory | HGX | 115 min |
| Dec 23, 11:06 PM CST | Mesoscale Discussion | SPC | 114 min |
| Dec 24, 3:30 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 30, 11:57 PM CST | Dense Fog Advisory | HGX | 12 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 | 28 |
| Tornado Warning | 6 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 48 |
| Flooding | |
| Flash Flood Warning | 5 |
| River Flood Warning | 4 |
| Flash Flood Watch | 2 |
| Flood Watch | 3 |
| Areal Flood Advisory | 9 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 1 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 2 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 6 |
| Fire Weather Watch | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 13 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.