Weather alerts in DeKalb County, Alabama, 2020

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

DeKalb County and its neighbors

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

Alerts: 157
Warnings: 40
Watches: 20
Advisories: 27
Busiest month: April30 alerts
Busiest day: April 13, 202012 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 8 tornado warnings covering DeKalb County in 2020 had a tornado report inside them; 1 of 2 tornado reports fell inside a warning, on average 12 minutes after it went out.

DeKalb County, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	8	1	88%	2	50%	12 min
Severe thunderstorm warnings	12	8	33%	16	38%	19 min
Flash flood warnings	6	4	33%	12	75%	244 min

Each office's whole area, 2020

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Huntsville, AL: tornado warnings	36	9	75%	19	58%	17 min
NWS Huntsville, AL: severe thunderstorm warnings	113	54	52%	375	50%	21 min
NWS Huntsville, AL: flash flood warnings	25	13	48%	66	53%	106 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, 3:00 AM CST	Flood Watch	HUN	63 hr
Jan 3, 7:35 AM CST	Dense Fog Advisory	HUN	2 hr
Jan 9, 1:58 PM CST	Wind Advisory	HUN	50 hr
Jan 11, 9:28 AM CST	Mesoscale Discussion	SPC	92 min
Jan 11, 12:20 PM CST	Mesoscale Discussion	SPC	85 min
Jan 11, 12:42 PM CST	Tornado Watch	SPC	7 hr
Jan 11, 1:15 PM CST	Mesoscale Discussion	SPC	90 min
Jan 11, 1:28 PM CST	Severe Thunderstorm Warning	HUN	62 min
Jan 11, 2:10 PM CST	Tornado Warning	HUN	20 min
Jan 14, 4:30 AM CST	Flash Flood Watch	HUN	7 hr
Jan 15, 11:16 PM CST	Special Weather Statement	HUN	44 min
Jan 24, 5:24 AM CST	Dense Fog Advisory	HUN	4 hr
Feb 5, 8:45 AM CST	Flash Flood Watch	HUN	26 hr
Feb 5, 10:55 AM CST	Severe Thunderstorm Warning	HUN	20 min
Feb 5, 3:47 PM CST	Mesoscale Discussion	SPC	118 min
Feb 5, 4:25 PM CST	Tornado Watch	SPC	5 hr
Feb 5, 9:20 PM CST	Areal Flood Warning	HUN	3 hr
Feb 5, 11:52 PM CST	Areal Flood Warning	HUN	33 hr
Feb 6, 1:10 AM CST	Special Weather Statement	HUN	35 min
Feb 6, 7:43 AM CST	Flash Flood Warning	HUN	3 hr
Feb 7, 8:57 PM CST	Winter Weather Advisory	HUN	14 hr
Feb 9, 3:21 AM CST	Flood Watch	HUN	24 hr
Feb 10, 3:34 AM CST	Flash Flood Watch	HUN	30 hr
Feb 10, 11:30 AM CST	Areal Flood Warning	HUN	12 hr
Feb 10, 1:18 PM CST	Areal Flood Warning	HUN	4 hr
Feb 10, 5:03 PM CST	Areal Flood Warning	HUN	6 hr
Feb 10, 11:10 PM CST	Areal Flood Warning	HUN	12 hr
Feb 11, 1:56 PM CST	Flash Flood Watch	HUN	40 hr
Feb 12, 4:34 PM CST	Severe Thunderstorm Watch	SPC	5 hr
Feb 12, 7:37 PM CST	Mesoscale Discussion	SPC	83 min
Feb 13, 4:25 AM CST	Areal Flood Warning	HUN	6 hr
Feb 18, 11:01 AM CST	Flash Flood Watch	HUN	9 hr
Mar 18, 2:59 AM CDT	Dense Fog Advisory	HUN	6 hr
Mar 24, 4:09 AM CDT	Flash Flood Watch	HUN	19 hr
Mar 24, 8:38 AM CDT	Flash Flood Warning	HUN	2 hr
Mar 24, 10:33 AM CDT	Areal Flood Warning	HUN	6 hr
Mar 24, 3:06 PM CDT	Tornado Watch	SPC	7 hr
Mar 24, 7:05 PM CDT	Mesoscale Discussion	SPC	55 min
Mar 24, 7:57 PM CDT	Tornado Warning	HUN	48 min
Mar 24, 8:32 PM CDT	Tornado Warning	HUN	24 min
Mar 24, 8:39 PM CDT	Tornado Warning	HUN	12 min
Mar 24, 8:57 PM CDT	Special Weather Statement	HUN	48 min
Mar 24, 9:53 PM CDT	Special Weather Statement	HUN	52 min
Mar 28, 9:58 PM CDT	Tornado Watch	SPC	7 hr
Mar 29, 5:02 AM CDT	Special Weather Statement	BMX	28 min
Apr 8, 8:22 PM CDT	Special Weather Statement	HUN	23 min
Apr 8, 9:52 PM CDT	Mesoscale Discussion	SPC	113 min
Apr 8, 10:16 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 9, 1:10 AM CDT	Mesoscale Discussion	SPC	95 min
Apr 9, 2:14 AM CDT	Special Weather Statement	HUN	61 min
Apr 10, 10:26 AM CDT	Frost Advisory	HUN	22 hr
Apr 11, 2:32 PM CDT	Wind Advisory	HUN	33 hr
Apr 12, 3:36 AM CDT	Flash Flood Watch	HUN	24 hr
Apr 12, 1:45 PM CDT	Mesoscale Discussion	SPC	90 min
Apr 12, 3:20 PM CDT	Tornado Watch	SPC	8 hr
Apr 12, 5:14 PM CDT	Mesoscale Discussion	SPC	91 min
Apr 12, 6:24 PM CDT	Tornado Warning Tornado observed	HUN	36 min
Apr 12, 6:52 PM CDT	Flash Flood Warning	HUN	3 hr
Apr 12, 7:39 PM CDT	Areal Flood Warning	HUN	6 hr
Apr 12, 9:25 PM CDT	Flash Flood Warning	HUN	7 hr
Apr 12, 9:34 PM CDT	Tornado Warning	HUN	26 min
Apr 12, 9:54 PM CDT	Flash Flood Warning	HUN	6 hr
Apr 12, 9:55 PM CDT	Tornado Warning	HUN	5 min
Apr 12, 9:59 PM CDT	Severe Thunderstorm Warning	HUN	31 min
Apr 12, 10:19 PM CDT	Tornado Warning	HUN	26 min
Apr 12, 11:43 PM CDT	Flash Flood Warning Considerable damage threat	HUN	10 hr
Apr 13, 3:34 AM CDT	Wind Advisory	HUN	6 hr
Apr 13, 4:00 AM CDT	Areal Flood Warning	HUN	6 hr
Apr 13, 9:33 AM CDT	Areal Flood Warning	HUN	6 hr
Apr 13, 2:48 PM CDT	Areal Flood Warning	HUN	2 hr
Apr 14, 2:13 AM CDT	Frost Advisory	HUN	30 hr
Apr 15, 6:34 PM CDT	Frost Advisory	HUN	13 hr
Apr 22, 9:50 PM CDT	Wind Advisory	HUN	11 hr
Apr 25, 4:33 PM CDT	Wind Advisory	HUN	5 hr
Apr 26, 4:27 AM CDT	Wind Advisory	HUN	14 hr
May 3, 5:41 PM CDT	Severe Thunderstorm Warning	HUN	49 min
May 3, 6:12 PM CDT	Special Weather Statement	BMX	48 min
May 4, 6:42 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 4, 8:16 PM CDT	Mesoscale Discussion	SPC	89 min
May 4, 10:26 PM CDT	Severe Thunderstorm Warning	HUN	34 min
May 5, 3:48 PM CDT	Special Weather Statement	HUN	27 min
May 5, 4:01 PM CDT	Special Weather Statement	HUN	29 min
May 5, 4:29 PM CDT	Special Weather Statement	HUN	31 min
May 8, 9:41 AM CDT	Wind Advisory	HUN	7 hr
May 9, 2:51 AM CDT	Frost Advisory	HUN	29 hr
May 22, 9:32 AM CDT	Special Weather Statement	BMX	43 min
Jun 3, 3:51 PM CDT	Special Weather Statement	HUN	24 min
Jun 3, 3:59 PM CDT	Special Weather Statement	HUN	31 min
Jun 3, 5:04 PM CDT	Special Weather Statement	HUN	26 min
Jun 3, 5:07 PM CDT	Special Weather Statement	HUN	23 min
Jun 3, 5:18 PM CDT	Special Weather Statement	BMX	27 min
Jun 3, 5:44 PM CDT	Special Weather Statement	HUN	31 min
Jun 3, 6:16 PM CDT	Special Weather Statement	HUN	29 min
Jun 5, 9:53 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 8, 6:13 PM CDT	Special Weather Statement	HUN	32 min
Jun 8, 6:39 PM CDT	Special Weather Statement	HUN	36 min
Jun 8, 9:18 PM CDT	Special Weather Statement	HUN	27 min
Jun 9, 5:06 PM CDT	Special Weather Statement	HUN	39 min
Jun 21, 2:01 PM CDT	Special Weather Statement	HUN	44 min
Jun 22, 5:11 PM CDT	Severe Thunderstorm Warning	HUN	34 min
Jun 27, 1:02 PM CDT	Special Weather Statement	HUN	43 min
Jun 29, 3:38 PM CDT	Special Weather Statement	HUN	37 min
Jun 30, 7:07 PM CDT	Special Weather Statement	HUN	38 min
Jul 3, 9:36 PM CDT	Special Weather Statement	HUN	39 min
Jul 8, 2:51 PM CDT	Special Weather Statement	HUN	39 min
Jul 13, 7:32 AM CDT	Dense Fog Advisory	HUN	88 min
Jul 19, 2:25 PM CDT	Special Weather Statement	HUN	35 min
Jul 20, 11:57 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 21, 5:21 PM CDT	Special Weather Statement	HUN	39 min
Jul 21, 5:32 PM CDT	Severe Thunderstorm Warning	HUN	28 min
Jul 21, 5:42 PM CDT	Special Weather Statement	HUN	48 min
Jul 21, 5:56 PM CDT	Severe Thunderstorm Warning	HUN	34 min
Jul 21, 6:21 PM CDT	Special Weather Statement	HUN	9 min
Jul 27, 1:06 PM CDT	Special Weather Statement	HUN	39 min
Jul 27, 1:45 PM CDT	Special Weather Statement	HUN	45 min
Jul 28, 1:59 PM CDT	Special Weather Statement	HUN	31 min
Jul 31, 1:29 PM CDT	Mesoscale Discussion	SPC	91 min
Jul 31, 4:33 PM CDT	Special Weather Statement	HUN	27 min
Aug 3, 11:13 AM CDT	Severe Thunderstorm Warning	HUN	12 min
Aug 10, 1:17 PM CDT	Mesoscale Discussion	SPC	118 min
Aug 10, 1:37 PM CDT	Special Weather Statement	HUN	38 min
Aug 10, 2:50 PM CDT	Special Weather Statement	HUN	40 min
Aug 12, 11:45 AM CDT	Special Weather Statement	HUN	30 min
Aug 12, 12:55 PM CDT	Special Weather Statement	HUN	35 min
Aug 19, 12:58 PM CDT	Special Weather Statement	HUN	47 min
Aug 19, 1:17 PM CDT	Severe Thunderstorm Warning	HUN	15 min
Aug 19, 1:56 PM CDT	Special Weather Statement	HUN	49 min
Aug 19, 1:59 PM CDT	Special Weather Statement	HUN	46 min
Aug 20, 7:15 PM CDT	Special Weather Statement	HUN	45 min
Aug 27, 3:53 PM CDT	Special Weather Statement	HUN	37 min
Aug 27, 4:11 PM CDT	Special Weather Statement	HUN	49 min
Aug 27, 4:18 PM CDT	Severe Thunderstorm Warning	HUN	27 min
Aug 28, 3:46 PM CDT	Tornado Watch	SPC	4 hr
Aug 28, 5:19 PM CDT	Mesoscale Discussion	SPC	116 min
Aug 28, 6:28 PM CDT	Severe Thunderstorm Warning	HUN	21 min
Aug 30, 1:39 PM CDT	Mesoscale Discussion	SPC	3 hr
Aug 30, 2:31 PM CDT	Special Weather Statement	HUN	14 min
Aug 30, 2:50 PM CDT	Special Weather Statement	HUN	25 min
Aug 30, 3:18 PM CDT	Special Weather Statement	HUN	27 min
Sep 28, 5:01 PM CDT	Special Weather Statement	HUN	44 min
Sep 28, 5:33 PM CDT	Special Weather Statement	BMX	42 min
Sep 29, 1:21 AM CDT	Dense Fog Advisory	HUN	7 hr
Oct 16, 9:43 AM CDT	Frost Advisory	HUN	22 hr
Oct 28, 3:40 AM CDT	Flash Flood Watch	HUN	26 hr
Oct 28, 9:54 AM CDT	Wind Advisory	HUN	26 hr
Oct 28, 10:19 PM CDT	High Wind Warning	HUN	8 hr
Oct 28, 10:19 PM CDT	Wind Advisory	HUN	14 hr
Oct 29, 3:07 AM CDT	Special Weather Statement	HUN	38 min
Oct 31, 3:13 AM CDT	Freeze Watch	HUN	23 hr
Nov 1, 1:17 AM CST	Freeze Warning	HUN	31 hr
Nov 2, 2:19 PM CST	Frost Advisory	HUN	18 hr
Nov 12, 10:38 PM CST	Dense Fog Advisory	HUN	9 hr
Dec 5, 2:51 AM CST	Freezing Fog Advisory	HUN	6 hr
Dec 6, 1:50 AM CST	Freezing Fog Advisory	HUN	7 hr
Dec 12, 8:32 PM CST	Dense Fog Advisory	HUN	12 hr
Dec 20, 7:28 PM CST	Dense Fog Advisory	HUN	9 hr
Dec 23, 2:26 PM CST	Wind Advisory	HUN	22 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	8
Severe Thunderstorm Watch	3
Tornado Watch	6
Mesoscale Discussion	17
Special Weather Statement	53
Flooding
Areal Flood Warning	12
Flash Flood Warning	6
Flash Flood Watch	8
Flood Watch	2
Winter
Winter Weather Advisory	1
Cold
Freeze Warning	1
Freeze Watch	1
Frost Advisory	6
Wind and dust
High Wind Warning	1
Wind Advisory	10
Fog and smoke
Dense Fog Advisory	8
Freezing Fog Advisory	2

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2019 2021

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.