Weather alerts in Harris County, Georgia, 2019

113 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Harris County and its neighbors

Each county as a circle sized by its count in 2019. Tap one for its archive.

Alerts: 113
Warnings: 26
Watches: 13
Advisories: 19
Busiest month: April20 alerts
Busiest day: April 19, 201911 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

2 of 5 tornado warnings covering Harris County in 2019 had a tornado report inside them; 3 of 5 tornado reports fell inside a warning, on average 9 minutes after it went out.

Harris County, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	5	2	60%	5	60%	9 min
Severe thunderstorm warnings	12	7	42%	6	67%	18 min
Flash flood warnings	3	2	33%	0

Each office's whole area, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Atlanta, GA: tornado warnings	51	19	63%	49	82%	14 min
NWS Atlanta, GA: severe thunderstorm warnings	331	187	44%	703	60%	17 min
NWS Atlanta, GA: flash flood warnings	34	15	56%	39	74%	138 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 2, 2:16 PM EST	Flash Flood Watch	FFC	43 hr
Jan 3, 3:22 AM EST	Dense Fog Advisory	FFC	6 hr
Jan 19, 12:30 AM EST	Dense Fog Advisory	FFC	11 hr
Jan 19, 3:26 PM EST	Wind Advisory	FFC	27 hr
Jan 19, 4:21 PM EST	Tornado Watch	SPC	6 hr
Jan 19, 5:53 PM EST	Severe Thunderstorm Warning	FFC	37 min
Jan 19, 6:38 PM EST	Mesoscale Discussion	SPC	97 min
Jan 23, 9:25 AM EST	Wind Advisory	FFC	13 hr
Feb 12, 10:38 AM EST	Mesoscale Discussion	SPC	2 hr
Feb 12, 1:22 PM EST	Special Weather Statement	FFC	23 min
Feb 12, 1:54 PM EST	Severe Thunderstorm Warning	FFC	36 min
Feb 21, 5:56 PM EST	Special Weather Statement	FFC	49 min
Feb 21, 6:07 PM EST	Tornado Warning	FFC	38 min
Feb 21, 6:40 PM EST	Mesoscale Discussion	SPC	2 hr
Feb 21, 8:36 PM EST	Dense Fog Advisory	FFC	14 hr
Feb 23, 2:42 PM EST	Wind Advisory	FFC	28 hr
Feb 24, 3:39 AM EST	Mesoscale Discussion	SPC	3 hr
Feb 24, 5:00 AM EST	Special Weather Statement	FFC	45 min
Mar 3, 10:59 AM EST	Mesoscale Discussion	SPC	2 hr
Mar 3, 12:24 PM EST	Tornado Watch	SPC	10 hr
Mar 3, 1:21 PM EST	Severe Thunderstorm Warning	FFC	24 min
Mar 3, 1:24 PM EST	Tornado Warning	FFC	34 min
Mar 3, 1:28 PM EST	Mesoscale Discussion	SPC	32 min
Mar 3, 1:58 PM EST	Severe Thunderstorm Warning	FFC	47 min
Mar 3, 3:19 PM EST	Tornado Warning EmergencyTornado observedCatastrophic damage threat	FFC	26 min
Mar 3, 3:41 PM EST	Tornado Warning Tornado observedConsiderable damage threat	FFC	34 min
Mar 3, 4:07 PM EST	Tornado Warning	FFC	9 min
Mar 3, 4:28 PM EST	Severe Thunderstorm Warning	FFC	32 min
Mar 4, 2:35 PM EST	Freeze Warning	FFC	20 hr
Mar 5, 3:10 AM EST	Freeze Warning	FFC	33 hr
Mar 6, 3:24 AM EST	Freeze Warning	FFC	31 hr
Mar 25, 7:31 PM EDT	Severe Thunderstorm Warning	FFC	44 min
Mar 25, 8:04 PM EDT	Mesoscale Discussion	SPC	116 min
Apr 6, 11:33 PM EDT	Special Weather Statement	FFC	27 min
Apr 7, 12:11 AM EDT	Special Weather Statement	FFC	34 min
Apr 13, 2:56 PM EDT	Wind Advisory	FFC	31 hr
Apr 14, 7:28 AM EDT	Tornado Watch	SPC	7 hr
Apr 14, 9:42 AM EDT	Severe Thunderstorm Warning	FFC	48 min
Apr 14, 10:30 AM EDT	Severe Thunderstorm Warning	FFC	45 min
Apr 14, 11:07 AM EDT	Mesoscale Discussion	SPC	83 min
Apr 18, 8:22 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 18, 10:29 PM EDT	Mesoscale Discussion	SPC	91 min
Apr 19, 12:39 AM EDT	Special Weather Statement	FFC	36 min
Apr 19, 1:33 AM EDT	Tornado Watch	SPC	9 hr
Apr 19, 3:42 AM EDT	Mesoscale Discussion	SPC	2 hr
Apr 19, 3:50 AM EDT	Special Weather Statement	FFC	40 min
Apr 19, 4:32 AM EDT	Special Weather Statement	FFC	43 min
Apr 19, 5:34 AM EDT	Flash Flood Warning	FFC	6 hr
Apr 19, 6:23 AM EDT	Flash Flood Warning	FFC	6 hr
Apr 19, 6:41 AM EDT	Special Weather Statement	FFC	49 min
Apr 19, 11:47 AM EDT	Areal Flood Warning	FFC	6 hr
Apr 25, 1:49 PM EDT	Wind Advisory	FFC	30 hr
Apr 25, 6:04 PM EDT	Special Weather Statement	FFC	26 min
May 11, 2:15 PM EDT	Mesoscale Discussion	SPC	2 hr
May 12, 10:15 AM EDT	Special Weather Statement	FFC	45 min
May 16, 7:18 PM EDT	Special Weather Statement	FFC	42 min
May 16, 8:01 PM EDT	Special Weather Statement	FFC	44 min
May 16, 8:36 PM EDT	Special Weather Statement	FFC	39 min
May 17, 8:25 AM EDT	Special Weather Statement	FFC	35 min
Jun 6, 12:15 PM EDT	Special Weather Statement	FFC	45 min
Jun 7, 12:58 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 7, 2:08 PM EDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 7, 3:12 PM EDT	Severe Thunderstorm Warning	FFC	48 min
Jun 8, 11:02 AM EDT	Flash Flood Watch	FFC	33 hr
Jun 8, 2:15 PM EDT	Mesoscale Discussion	SPC	2 hr
Jun 8, 2:21 PM EDT	Flash Flood Warning	FFC	5 hr
Jun 9, 6:33 PM EDT	Special Weather Statement	FFC	42 min
Jun 10, 3:36 PM EDT	Special Weather Statement	FFC	39 min
Jun 18, 3:38 PM EDT	Special Weather Statement	FFC	37 min
Jun 20, 12:02 PM EDT	Mesoscale Discussion	SPC	118 min
Jun 20, 1:44 PM EDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 22, 2:27 PM EDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 22, 6:45 PM EDT	Severe Thunderstorm Warning	FFC	45 min
Jun 22, 7:17 PM EDT	Severe Thunderstorm Warning	FFC	43 min
Jun 24, 7:48 PM EDT	Special Weather Statement	FFC	27 min
Jul 5, 3:52 PM EDT	Special Weather Statement	FFC	38 min
Jul 14, 7:36 PM EDT	Special Weather Statement	FFC	24 min
Jul 18, 2:14 PM EDT	Special Weather Statement	FFC	31 min
Jul 18, 2:44 PM EDT	Special Weather Statement	FFC	31 min
Jul 19, 1:53 PM EDT	Special Weather Statement	FFC	37 min
Jul 20, 4:58 PM EDT	Special Weather Statement	FFC	32 min
Aug 9, 2:37 PM EDT	Heat Advisory	FFC	29 hr
Aug 10, 2:40 PM EDT	Heat Advisory	FFC	29 hr
Aug 11, 2:24 PM EDT	Heat Advisory	FFC	30 hr
Aug 12, 11:07 AM EDT	Heat Advisory	FFC	33 hr
Aug 13, 2:52 PM EDT	Heat Advisory	FFC	29 hr
Aug 14, 3:06 AM EDT	Special Weather Statement	FFC	54 min
Aug 14, 3:54 AM EDT	Special Weather Statement	FFC	66 min
Aug 14, 11:28 PM EDT	Special Weather Statement	FFC	32 min
Aug 20, 4:31 PM EDT	Severe Thunderstorm Warning	FFC	44 min
Aug 20, 5:07 PM EDT	Special Weather Statement	FFC	38 min
Aug 31, 6:56 PM EDT	Special Weather Statement	FFC	34 min
Aug 31, 7:34 PM EDT	Special Weather Statement	FFC	26 min
Aug 31, 8:22 PM EDT	Special Weather Statement	FFC	23 min
Sep 8, 9:51 PM EDT	Heat Advisory	FFC	22 hr
Sep 10, 3:13 PM EDT	Special Weather Statement	FFC	32 min
Sep 10, 3:47 PM EDT	Special Weather Statement	FFC	28 min
Oct 18, 3:39 PM EDT	Wind Advisory	FFC	25 hr
Oct 28, 5:10 AM EDT	Dense Fog Advisory	FFC	7 hr
Oct 31, 12:13 PM EDT	Special Weather Statement	FFC	32 min
Oct 31, 12:44 PM EDT	Special Weather Statement	FFC	31 min
Oct 31, 1:25 PM EDT	Mesoscale Discussion	SPC	2 hr
Nov 1, 5:51 PM EDT	Frost Advisory	FFC	16 hr
Nov 9, 2:41 PM EST	Freeze Warning	FFC	18 hr
Nov 11, 6:13 AM EST	Freeze Watch	FFC	22 hr
Nov 11, 2:38 PM EST	Wind Advisory	FFC	28 hr
Nov 12, 3:51 AM EST	Freeze Warning	FFC	30 hr
Dec 1, 4:30 AM EST	Special Weather Statement	FFC	45 min
Dec 17, 12:11 AM EST	Mesoscale Discussion	SPC	64 min
Dec 17, 2:30 AM EST	Special Weather Statement	FFC	30 min
Dec 21, 2:52 PM EST	Flood Watch	FFC	48 hr
Dec 21, 2:52 PM EST	High Wind Watch	FFC	12 hr
Dec 22, 3:09 AM EST	Wind Advisory	FFC	28 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	12
Tornado Warning	5
Severe Thunderstorm Watch	4
Tornado Watch	4
Mesoscale Discussion	16
Special Weather Statement	39
Flooding
Areal Flood Warning	1
Flash Flood Warning	3
Flash Flood Watch	2
Flood Watch	1
Heat
Heat Advisory	6
Cold
Freeze Warning	5
Freeze Watch	1
Frost Advisory	1
Wind and dust
High Wind Watch	1
Wind Advisory	8
Fog and smoke
Dense Fog Advisory	4

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2018 2020

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.