Alert archive / Texas / Galveston County

Weather alerts in Galveston County, Texas, 2020

267 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Galveston County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
267
Warnings
41
Watches
20
Advisories
98
Busiest month
May37 alerts
Busiest day
September 22, 202011 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 4 tornado warnings covering Galveston County in 2020 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Galveston County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings40100%10%
Severe thunderstorm warnings12650%1080%32 min
Flash flood warnings8538%367%128 min

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Houston/Galveston, TX: tornado warnings25580%1486%15 min
NWS Houston/Galveston, TX: severe thunderstorm warnings1165354%22279%22 min
NWS Houston/Galveston, TX: flash flood warnings331555%4691%54 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.

IssuedProductOfficeLasted
Jan 2, 4:33 AM CSTDense Fog AdvisoryHGX7 hr
Jan 5, 5:13 AM CSTDense Fog AdvisoryHGX4 hr
Jan 9, 9:31 AM CSTRip Current StatementHGX44 hr
Jan 10, 8:49 PM CSTMesoscale DiscussionSPC116 min
Jan 10, 9:09 PM CSTTornado WatchSPC5 hr
Jan 11, 12:21 AM CSTMesoscale DiscussionSPC99 min
Jan 11, 12:23 AM CSTSevere Thunderstorm WarningHGX52 min
Jan 11, 12:50 AM CSTTornado WarningHGX25 min
Jan 11, 1:11 AM CSTSevere Thunderstorm WarningHGX49 min
Jan 13, 6:35 PM CSTDense Fog AdvisoryHGX15 hr
Jan 14, 10:03 AM CSTDense Fog AdvisoryHGX117 min
Jan 14, 6:43 PM CSTDense Fog AdvisoryHGX13 hr
Jan 15, 10:26 AM CSTDense Fog AdvisoryHGX4 hr
Jan 15, 5:36 PM CSTDense Fog AdvisoryHGX16 hr
Jan 16, 10:25 AM CSTDense Fog AdvisoryHGX95 min
Jan 16, 2:55 PM CSTDense Fog AdvisoryHGX19 hr
Jan 17, 10:58 PM CSTDense Fog AdvisoryHGX15 hr
Jan 21, 3:44 PM CSTBeach Hazards StatementHGX50 hr
Jan 23, 1:27 AM CSTSpecial Weather StatementHGX48 min
Jan 23, 1:36 AM CSTAreal Flood AdvisoryHGX114 min
Jan 26, 3:05 AM CSTAreal Flood AdvisoryHGX115 min
Jan 26, 4:50 AM CSTAreal Flood AdvisoryHGX115 min
Jan 26, 8:23 PM CSTDense Fog AdvisoryHGX15 hr
Feb 3, 9:36 AM CSTBeach Hazards StatementHGX29 hr
Feb 4, 10:08 PM CSTBeach Hazards StatementHGX8 hr
Feb 9, 3:46 AM CSTRip Current StatementHGX38 hr
Feb 10, 4:18 PM CSTDense Fog AdvisoryHGX14 hr
Feb 11, 4:12 AM CSTRip Current StatementHGX108 min
Feb 12, 4:58 AM CSTDense Fog AdvisoryHGX5 hr
Feb 16, 12:36 AM CSTDense Fog AdvisoryHGX9 hr
Feb 16, 5:09 PM CSTDense Fog AdvisoryHGX19 hr
Feb 17, 3:47 PM CSTDense Fog AdvisoryHGX6 hr
Feb 17, 10:10 PM CSTDense Fog AdvisoryHGX12 hr
Feb 20, 3:21 AM CSTWind AdvisoryHGX27 hr
Feb 25, 3:00 PM CSTWind AdvisoryHGX30 hr
Mar 1, 9:03 AM CSTRip Current StatementHGX19 hr
Mar 2, 8:52 AM CSTRip Current StatementHGX13 hr
Mar 3, 1:17 AM CSTDense Fog AdvisoryHGX9 hr
Mar 4, 12:37 AM CSTDense Fog AdvisoryHGX8 hr
Mar 7, 8:28 AM CSTRip Current StatementHGX13 hr
Mar 10, 5:00 AM CDTDense Fog AdvisoryHGX5 hr
Mar 11, 2:33 AM CDTDense Fog AdvisoryHGX7 hr
Mar 11, 10:22 AM CDTDense Fog AdvisoryHGX98 min
Mar 11, 11:48 PM CDTDense Fog AdvisoryHGX8 hr
Mar 15, 7:32 PM CDTDense Fog AdvisoryHGX4 hr
Mar 17, 2:37 AM CDTDense Fog AdvisoryHGX7 hr
Mar 17, 6:57 PM CDTDense Fog AdvisoryHGX3 hr
Mar 27, 9:31 AM CDTRip Current StatementHGX11 hr
Mar 27, 10:31 PM CDTRip Current StatementHGX20 hr
Apr 2, 5:33 PM CDTRip Current StatementHGX37 hr
Apr 7, 1:56 AM CDTDense Fog AdvisoryHGX6 hr
Apr 9, 5:20 PM CDTMesoscale DiscussionSPC115 min
Apr 11, 3:44 PM CDTBeach Hazards StatementHGX27 hr
Apr 11, 3:44 PM CDTCoastal Flood AdvisoryHGX20 hr
Apr 11, 10:27 PM CDTBeach Hazards StatementHGX21 hr
Apr 12, 2:21 AM CDTWind AdvisoryHGX17 hr
Apr 17, 9:13 PM CDTMesoscale DiscussionSPC2 hr
Apr 19, 3:58 AM CDTDense Fog AdvisoryHGX4 hr
Apr 19, 7:22 AM CDTMesoscale DiscussionSPC113 min
Apr 19, 8:41 AM CDTTornado WatchSPC6 hr
Apr 19, 12:39 PM CDTMesoscale DiscussionSPC66 min
Apr 19, 2:39 PM CDTTornado WatchSPC9 hr
Apr 19, 2:54 PM CDTSevere Thunderstorm WarningHGX21 min
Apr 19, 3:59 PM CDTSevere Thunderstorm WarningHGX14 min
Apr 19, 11:05 PM CDTDense Fog AdvisoryHGX9 hr
Apr 28, 12:47 PM CDTMesoscale DiscussionSPC118 min
Apr 28, 5:22 PM CDTWind AdvisoryHGX3 hr
Apr 29, 2:40 AM CDTSevere Thunderstorm WatchSPC6 hr
Apr 29, 4:59 AM CDTSevere Thunderstorm WarningHGX61 min
Apr 29, 5:05 AM CDTMesoscale DiscussionSPC115 min
Apr 29, 5:56 AM CDTSevere Thunderstorm WarningHGX19 min
Apr 29, 6:47 AM CDTAreal Flood AdvisoryHGX118 min
May 3, 9:16 AM CDTRip Current StatementHGX16 hr
May 5, 7:11 PM CDTAreal Flood AdvisoryHGX2 hr
May 7, 2:01 PM CDTBeach Hazards StatementHGX30 hr
May 7, 9:12 PM CDTWind AdvisoryHGX10 hr
May 9, 9:03 AM CDTRip Current StatementHGX15 hr
May 10, 9:41 AM CDTRip Current StatementHGX11 hr
May 11, 9:20 AM CDTRip Current StatementHGX12 hr
May 12, 6:19 AM CDTBeach Hazards StatementHGX17 hr
May 13, 8:29 AM CDTRip Current StatementHGX16 hr
May 15, 5:14 AM CDTFlash Flood WatchHGX26 hr
May 15, 3:03 PM CDTAreal Flood AdvisoryHGX117 min
May 15, 3:20 PM CDTSpecial Weather StatementHGX40 min
May 15, 3:42 PM CDTFlash Flood WarningHGX4 hr
May 15, 4:59 PM CDTSpecial Weather StatementHGX46 min
May 15, 6:01 PM CDTSpecial Weather StatementHGX59 min
May 15, 8:08 PM CDTAreal Flood AdvisoryHGX52 min
May 16, 12:54 AM CDTSevere Thunderstorm WatchSPC4 hr
May 16, 11:55 AM CDTRip Current StatementHGX10 hr
May 22, 4:54 PM CDTRip Current StatementHGX29 hr
May 24, 3:16 AM CDTRip Current StatementHGX21 hr
May 24, 8:50 PM CDTAreal Flood AdvisoryHGX90 min
May 25, 4:16 AM CDTSevere Thunderstorm WarningHGX18 min
May 25, 3:47 PM CDTRip Current StatementHGX8 hr
May 27, 1:24 PM CDTSevere Thunderstorm WatchSPC9 hr
May 27, 4:28 PM CDTSevere Thunderstorm WarningHGX62 min
May 27, 4:50 PM CDTTornado WarningHGX13 min
May 27, 5:06 PM CDTSevere Thunderstorm WarningHGX54 min
May 27, 5:28 PM CDTAreal Flood AdvisoryHGX115 min
May 28, 9:23 AM CDTRip Current StatementHGX15 hr
May 28, 2:18 PM CDTSpecial Weather StatementHGX42 min
May 28, 2:44 PM CDTSevere Thunderstorm WarningHGX46 min
May 28, 2:51 PM CDTTornado WarningHGX24 min
May 28, 3:01 PM CDTMesoscale DiscussionSPC119 min
May 28, 3:16 PM CDTSevere Thunderstorm WarningHGX14 min
May 28, 3:30 PM CDTSpecial Weather StatementHGX60 min
May 28, 4:02 PM CDTSpecial Weather StatementHGX58 min
May 29, 2:41 PM CDTSpecial Weather StatementHGX34 min
Jun 6, 10:11 PM CDTRip Current StatementHGX21 hr
Jun 8, 3:08 PM CDTHeat AdvisoryHGX28 hr
Jun 8, 3:43 PM CDTAreal Flood AdvisoryHGX3 hr
Jun 8, 4:15 PM CDTFlash Flood WarningHGX2 hr
Jun 8, 4:41 PM CDTFlash Flood WarningHGX94 min
Jun 8, 4:56 PM CDTAreal Flood AdvisoryHGX2 hr
Jun 8, 5:02 PM CDTRip Current StatementHGX7 hr
Jun 9, 10:08 AM CDTRip Current StatementHGX15 hr
Jun 22, 11:10 AM CDTSpecial Weather StatementHGX95 min
Jun 22, 12:14 PM CDTAreal Flood AdvisoryHGX61 min
Jun 22, 12:37 PM CDTSpecial Weather StatementHGX38 min
Jun 23, 9:27 AM CDTRip Current StatementHGX10 hr
Jun 23, 12:16 PM CDTFlash Flood WatchHGX19 hr
Jun 24, 5:17 AM CDTAreal Flood AdvisoryHGX118 min
Jun 24, 5:56 AM CDTAreal Flood AdvisoryHGX64 min
Jun 24, 6:42 AM CDTAreal Flood AdvisoryHGX63 min
Jun 25, 9:42 AM CDTAreal Flood AdvisoryHGX108 min
Jun 26, 8:51 AM CDTRip Current StatementHGX10 hr
Jun 27, 3:38 AM CDTRip Current StatementHGX20 hr
Jun 28, 3:42 AM CDTRip Current StatementHGX15 hr
Jun 29, 4:11 AM CDTRip Current StatementHGX30 hr
Jun 30, 12:28 PM CDTRip Current StatementHGX43 hr
Jul 2, 10:03 AM CDTRip Current StatementHGX9 hr
Jul 9, 8:40 AM CDTBeach Hazards StatementHGX13 hr
Jul 10, 3:12 AM CDTHeat AdvisoryHGX16 hr
Jul 10, 3:55 PM CDTHeat AdvisoryHGX28 hr
Jul 11, 2:44 PM CDTHeat AdvisoryHGX29 hr
Jul 12, 3:16 PM CDTHeat AdvisoryHGX29 hr
Jul 13, 3:13 PM CDTHeat AdvisoryHGX29 hr
Jul 17, 9:06 AM CDTSpecial Weather StatementHGX39 min
Jul 20, 10:33 AM CDTRip Current StatementHGX14 hr
Jul 21, 6:26 AM CDTAreal Flood AdvisoryHGX4 hr
Jul 21, 11:07 AM CDTRip Current StatementHGX9 hr
Jul 22, 9:57 PM CDTTropical Storm WatchHGX36 hr
Jul 23, 4:05 PM CDTTropical Storm WarningHGX48 hr
Jul 24, 9:23 AM CDTCoastal Flood AdvisoryHGX7 hr
Jul 24, 9:23 AM CDTRip Current StatementHGX21 hr
Jul 24, 2:50 PM CDTFlash Flood WatchHGX38 hr
Jul 24, 4:06 PM CDTCoastal Flood WarningHGX37 hr
Jul 25, 6:59 AM CDTMesoscale DiscussionSPC2 hr
Jul 25, 10:05 AM CDTRip Current StatementHGX5 hr
Jul 25, 1:55 PM CDTAreal Flood AdvisoryHGX50 min
Jul 26, 4:55 AM CDTCoastal Flood AdvisoryHGX11 hr
Jul 26, 4:55 AM CDTRip Current StatementHGX20 hr
Jul 27, 3:33 AM CDTRip Current StatementHGX12 hr
Jul 28, 1:05 PM CDTAreal Flood AdvisoryHGX115 min
Jul 30, 10:09 AM CDTRip Current StatementHGX14 hr
Jul 31, 9:58 AM CDTRip Current StatementHGX14 hr
Aug 12, 3:05 AM CDTHeat AdvisoryHGX5 days
Aug 22, 3:30 PM CDTSpecial Weather StatementHGX45 min
Aug 24, 3:52 PM CDTHurricane WatchHGX18 hr
Aug 24, 3:55 PM CDTStorm Surge WatchHGX36 hr
Aug 24, 3:55 PM CDTTropical Storm WatchHGX18 hr
Aug 25, 10:04 AM CDTHurricane WarningHGX39 hr
Aug 25, 10:04 AM CDTTropical Storm WarningHGX48 hr
Aug 25, 10:07 AM CDTStorm Surge WarningHGX42 hr
Aug 27, 4:13 AM CDTCoastal Flood WarningHGX6 hr
Aug 27, 10:09 AM CDTCoastal Flood WarningHGX5 hr
Aug 27, 3:16 PM CDTCoastal Flood AdvisoryHGX9 hr
Aug 28, 3:59 AM CDTHeat AdvisoryHGX18 hr
Aug 28, 1:06 PM CDTCoastal Flood AdvisoryHGX8 hr
Aug 28, 3:07 PM CDTHeat AdvisoryHGX30 hr
Aug 29, 8:29 AM CDTRip Current StatementHGX13 hr
Aug 30, 4:13 AM CDTHeat AdvisoryHGX40 hr
Aug 31, 9:39 AM CDTRip Current StatementHGX12 hr
Aug 31, 12:48 PM CDTExcessive Heat WarningHGX7 hr
Aug 31, 3:47 PM CDTHeat AdvisoryHGX28 hr
Sep 1, 4:40 AM CDTRip Current StatementHGX14 hr
Sep 2, 3:51 AM CDTRip Current StatementHGX15 hr
Sep 2, 4:04 AM CDTHeat AdvisoryHGX15 hr
Sep 3, 4:00 AM CDTHeat AdvisoryHGX14 hr
Sep 3, 2:48 PM CDTRip Current StatementHGX19 hr
Sep 4, 2:39 PM CDTHeat AdvisoryHGX4 hr
Sep 9, 8:55 AM CDTRip Current StatementHGX13 hr
Sep 16, 8:41 AM CDTCoastal Flood StatementHGX49 hr
Sep 18, 10:03 AM CDTCoastal Flood WatchHGX12 hr
Sep 18, 10:20 PM CDTHurricane WatchHGX30 hr
Sep 18, 10:20 PM CDTStorm Surge WatchHGX18 hr
Sep 19, 10:12 AM CDTTropical Storm WarningHGX3 days
Sep 19, 4:18 PM CDTStorm Surge WarningHGX66 hr
Sep 19, 4:28 PM CDTFlash Flood WatchHGX3 days
Sep 21, 12:52 PM CDTTornado WarningHGX38 min
Sep 21, 1:22 PM CDTMesoscale DiscussionSPC2 hr
Sep 21, 4:54 PM CDTAreal Flood AdvisoryHGX4 hr
Sep 21, 7:08 PM CDTFlash Flood WarningHGX82 min
Sep 21, 8:27 PM CDTFlash Flood WarningHGX3 hr
Sep 21, 8:52 PM CDTRiver Flood WarningHGX46 hr
Sep 21, 11:17 PM CDTRiver Flood WarningHGX57 hr
Sep 22, 1:18 AM CDTCoastal Flood WarningHGX35 hr
Sep 22, 3:09 AM CDTRiver Flood WarningHGX37 hr
Sep 22, 8:29 AM CDTFlash Flood WarningHGX4 hr
Sep 22, 9:03 AM CDTAreal Flood AdvisoryHGX4 hr
Sep 22, 10:39 AM CDTRip Current StatementHGX20 hr
Sep 22, 12:36 PM CDTFlash Flood WarningHGX4 hr
Sep 22, 4:31 PM CDTAreal Flood AdvisoryHGX2 hr
Sep 22, 7:01 PM CDTAreal Flood AdvisoryHGX4 hr
Sep 23, 7:14 AM CDTCoastal Flood AdvisoryHGX21 hr
Sep 23, 7:14 AM CDTRip Current StatementHGX6 hr
Sep 28, 4:06 AM CDTWind AdvisoryHGX17 hr
Oct 6, 4:41 AM CDTRip Current StatementHGX16 hr
Oct 7, 9:54 AM CDTTropical Storm WatchHGX12 hr
Oct 7, 10:34 AM CDTCoastal Flood AdvisoryHGX6 hr
Oct 7, 4:14 PM CDTCoastal Flood WatchHGX12 hr
Oct 7, 9:57 PM CDTTropical Storm WarningHGX48 hr
Oct 8, 4:07 AM CDTCoastal Flood WarningHGX42 hr
Oct 9, 10:27 PM CDTCoastal Flood AdvisoryHGX5 hr
Oct 10, 3:52 AM CDTRip Current StatementHGX7 hr
Oct 11, 1:51 AM CDTDense Fog AdvisoryHGX7 hr
Oct 16, 4:34 AM CDTWind AdvisoryHGX8 hr
Oct 21, 4:30 AM CDTDense Fog AdvisoryHGX5 hr
Oct 22, 8:47 AM CDTRip Current StatementHGX10 hr
Oct 23, 2:25 PM CDTSevere Thunderstorm WarningHGX50 min
Oct 23, 3:02 PM CDTSpecial Weather StatementHGX43 min
Oct 23, 3:45 PM CDTSpecial Weather StatementHGX60 min
Oct 28, 3:50 AM CDTBeach Hazards StatementHGX18 hr
Nov 8, 12:47 AM CSTDense Fog AdvisoryHGX8 hr
Nov 8, 11:10 AM CSTRip Current StatementHGX9 hr
Nov 9, 4:01 AM CSTRip Current StatementHGX14 hr
Nov 10, 2:42 AM CSTRip Current StatementHGX12 hr
Nov 11, 12:31 AM CSTDense Fog AdvisoryHGX3 hr
Nov 13, 2:20 AM CSTDense Fog AdvisoryHGX7 hr
Nov 17, 3:03 PM CSTBeach Hazards StatementHGX27 hr
Nov 19, 3:30 AM CSTRip Current StatementHGX21 hr
Nov 20, 3:03 AM CSTDense Fog AdvisoryHGX6 hr
Nov 20, 6:30 AM CSTRip Current StatementHGX15 hr
Nov 21, 2:07 AM CSTRip Current StatementHGX20 hr
Nov 29, 6:56 PM CSTWind AdvisoryHGX17 hr
Dec 2, 3:18 AM CSTBeach Hazards StatementHGX21 hr
Dec 2, 9:09 AM CSTSpecial Weather StatementHGX36 min
Dec 2, 3:15 PM CSTMesoscale DiscussionSPC90 min
Dec 2, 8:29 PM CSTWind AdvisoryHGX13 hr
Dec 11, 7:46 PM CSTDense Fog AdvisoryHGX7 hr
Dec 12, 4:02 AM CSTDense Fog AdvisoryHGX5 hr
Dec 13, 1:46 PM CSTMesoscale DiscussionSPC119 min
Dec 13, 3:16 PM CSTWind AdvisoryHGX13 hr
Dec 13, 3:19 PM CSTSpecial Weather StatementHGX86 min
Dec 15, 9:56 AM CSTRip Current StatementHGX8 hr
Dec 19, 12:43 PM CSTAreal Flood AdvisoryHGX2 hr
Dec 19, 12:59 PM CSTMesoscale DiscussionSPC91 min
Dec 19, 1:43 PM CSTSpecial Weather StatementHGX17 min
Dec 19, 1:52 PM CSTSpecial Weather StatementHGX23 min
Dec 21, 12:22 AM CSTDense Fog AdvisoryHGX10 hr
Dec 23, 3:00 AM CSTWind AdvisoryHGX33 hr
Dec 23, 10:20 AM CSTRip Current StatementHGX8 hr
Dec 27, 11:46 AM CSTRip Current StatementHGX6 hr
Dec 28, 9:33 AM CSTRip Current StatementHGX8 hr
Dec 29, 9:16 AM CSTRip Current StatementHGX51 hr
Dec 30, 4:48 PM CSTMesoscale DiscussionSPC2 hr
Dec 31, 7:10 AM CSTMesoscale DiscussionSPC95 min
Dec 31, 7:40 AM CSTTornado WatchSPC7 hr
Dec 31, 9:45 AM CSTWind AdvisoryHGX17 hr
Dec 31, 11:21 AM CSTMesoscale DiscussionSPC114 min
Dec 31, 11:31 AM CSTAreal Flood AdvisoryHGX3 hr
Dec 31, 11:51 AM CSTFlash Flood WarningHGX114 min
Dec 31, 11:58 AM CSTSpecial Weather StatementHGX62 min
Dec 31, 1:26 PM CSTAreal Flood AdvisoryHGX2 hr
Dec 31, 2:29 PM CSTAreal Flood WarningHGX6 hr
Dec 31, 3:11 PM CSTRip Current StatementHGX9 hr

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 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.