Alert archive / Nebraska / Jefferson County

Weather alerts in Jefferson County, Nebraska, 2019

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

Jefferson County and its neighbors

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

Alerts: 194
Warnings: 44
Watches: 39
Advisories: 45
Busiest month: May38 alerts
Busiest day: June 21, 201910 alerts

Over time

By month

Warning verification

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

Jefferson County, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	26	10	62%	15	87%	28 min
Flash flood warnings	1	0	100%	2	0%

Each office's whole area, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Omaha, NE: tornado warnings	23	7	70%	9	78%	18 min
NWS Omaha, NE: severe thunderstorm warnings	191	82	57%	179	74%	17 min
NWS Omaha, NE: flash flood warnings	47	10	79%	27	81%	284 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 10, 3:32 PM CST	Winter Weather Advisory	OAX	48 hr
Jan 12, 7:25 AM CST	Winter Storm Warning	OAX	9 hr
Jan 14, 9:13 PM CST	Dense Fog Advisory	OAX	12 hr
Jan 17, 3:38 AM CST	Winter Weather Advisory	OAX	48 hr
Jan 21, 3:47 AM CST	Winter Weather Advisory	OAX	50 hr
Jan 23, 3:01 PM CST	Winter Weather Advisory	OAX	27 hr
Jan 27, 3:04 AM CST	High Wind Warning	OAX	31 hr
Jan 27, 3:55 AM CST	Wind Advisory	OAX	38 hr
Jan 28, 12:43 AM CST	Wind Advisory	OAX	17 hr
Jan 28, 2:38 AM CST	Wind Chill Advisory	OAX	3 days
Feb 2, 9:08 AM CST	Dense Fog Advisory	OAX	3 hr
Feb 2, 12:14 PM CST	Dense Fog Advisory	OAX	25 hr
Feb 5, 3:31 PM CST	Winter Weather Advisory	OAX	50 hr
Feb 7, 3:29 AM CST	Wind Chill Advisory	OAX	33 hr
Feb 10, 3:56 AM CST	Winter Weather Advisory	OAX	44 hr
Feb 14, 2:47 AM CST	Winter Weather Advisory	OAX	25 hr
Feb 15, 4:09 AM CST	Winter Weather Advisory	OAX	14 hr
Feb 15, 3:35 PM CST	Winter Weather Advisory	OAX	50 hr
Feb 16, 7:26 PM CST	Mesoscale Discussion	SPC	5 hr
Feb 18, 3:50 AM CST	Winter Storm Watch	OAX	24 hr
Feb 19, 3:40 AM CST	Winter Storm Warning	OAX	32 hr
Feb 21, 4:18 AM CST	Winter Weather Advisory	OAX	71 hr
Feb 21, 4:13 PM CST	Winter Storm Watch	OAX	22 hr
Feb 22, 1:46 PM CST	Blizzard Warning	OAX	37 hr
Feb 23, 1:52 PM CST	Mesoscale Discussion	SPC	5 hr
Feb 23, 9:56 PM CST	Winter Weather Advisory	OAX	5 hr
Mar 2, 3:22 AM CST	Wind Chill Advisory	OAX	57 hr
Mar 2, 3:38 PM CST	Wind Chill Advisory	OAX	44 hr
Mar 9, 3:27 AM CST	Wind Advisory	OAX	21 hr
Mar 11, 3:31 AM CDT	Flood Watch	OAX	3 days
Mar 12, 11:25 AM CDT	River Flood Warning	OAX	23 hr
Mar 12, 1:48 PM CDT	Areal Flood Advisory	OAX	6 hr
Mar 12, 3:13 PM CDT	Dense Fog Advisory	OAX	25 hr
Mar 13, 9:41 AM CDT	Areal Flood Warning	OAX	3 hr
Mar 13, 1:25 PM CDT	Wind Advisory	OAX	3 hr
Mar 13, 3:35 PM CDT	Mesoscale Discussion	SPC	85 min
Mar 13, 4:02 PM CDT	Wind Advisory	OAX	33 hr
Mar 13, 6:29 PM CDT	Areal Flood Warning	OAX	39 hr
Mar 15, 9:45 AM CDT	Areal Flood Warning	OAX	24 hr
Mar 18, 11:01 AM CDT	Areal Flood Warning	OAX	24 hr
Mar 19, 10:54 AM CDT	Areal Flood Warning	OAX	12 hr
Mar 23, 2:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 28, 7:52 AM CDT	Mesoscale Discussion	SPC	113 min
Mar 28, 9:25 AM CDT	Special Weather Statement	OAX	35 min
Mar 28, 9:55 AM CDT	Mesoscale Discussion	SPC	2 hr
Mar 28, 11:29 AM CDT	Flash Flood Warning	OAX	101 min
Mar 28, 1:15 PM CDT	Areal Flood Advisory	OAX	2 hr
Apr 5, 1:05 AM CDT	Dense Fog Advisory	OAX	9 hr
Apr 10, 5:49 PM CDT	Mesoscale Discussion	SPC	116 min
Apr 10, 6:39 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 10, 8:21 PM CDT	Severe Thunderstorm Warning	OAX	54 min
Apr 10, 9:11 PM CDT	Severe Thunderstorm Warning	OAX	49 min
Apr 10, 10:08 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 26, 4:28 PM CDT	Wind Advisory	OAX	24 hr
Apr 27, 3:24 AM CDT	Frost Advisory	OAX	24 hr
May 4, 4:33 AM CDT	Dense Fog Advisory	OAX	4 hr
May 5, 3:39 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 5, 5:01 PM CDT	Mesoscale Discussion	SPC	89 min
May 5, 6:33 PM CDT	Mesoscale Discussion	SPC	87 min
May 6, 1:16 PM CDT	Mesoscale Discussion	SPC	119 min
May 6, 2:25 PM CDT	Severe Thunderstorm Warning	OAX	20 min
May 7, 3:46 AM CDT	Flash Flood Watch	OAX	35 hr
May 17, 11:14 PM CDT	Mesoscale Discussion	SPC	2 hr
May 17, 11:45 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
May 18, 12:07 AM CDT	Special Weather Statement	OAX	23 min
May 19, 4:20 AM CDT	Flash Flood Watch	OAX	63 hr
May 21, 10:57 AM CDT	Special Weather Statement	OAX	78 min
May 21, 6:06 PM CDT	Mesoscale Discussion	SPC	114 min
May 21, 6:35 PM CDT	Special Weather Statement	OAX	40 min
May 23, 3:08 PM CDT	Severe Thunderstorm Warning	OAX	34 min
May 23, 4:17 PM CDT	Flash Flood Watch	OAX	29 hr
May 23, 7:07 PM CDT	Mesoscale Discussion	SPC	83 min
May 23, 7:42 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
May 23, 8:14 PM CDT	Severe Thunderstorm Warning	OAX	31 min
May 23, 11:33 PM CDT	Mesoscale Discussion	SPC	87 min
May 24, 1:37 AM CDT	Tornado Watch	SPC	5 hr
May 24, 3:32 AM CDT	Special Weather Statement	OAX	43 min
May 25, 3:28 AM CDT	Flash Flood Watch	OAX	24 hr
May 26, 1:17 PM CDT	Flash Flood Watch	OAX	25 hr
May 26, 8:53 PM CDT	Mesoscale Discussion	SPC	2 hr
May 27, 1:54 AM CDT	Mesoscale Discussion	SPC	111 min
May 27, 2:41 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
May 27, 7:34 PM CDT	Mesoscale Discussion	SPC	56 min
May 27, 10:55 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 27, 11:42 PM CDT	Mesoscale Discussion	SPC	63 min
May 27, 11:43 PM CDT	Severe Thunderstorm Warning	OAX	47 min
May 27, 11:48 PM CDT	Severe Thunderstorm Warning	OAX	42 min
May 28, 12:22 AM CDT	Severe Thunderstorm Warning	OAX	38 min
May 28, 6:06 AM CDT	River Flood Warning	OAX	4 days
May 28, 7:19 AM CDT	Areal Flood Warning	OAX	11 hr
May 28, 3:13 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 28, 7:05 PM CDT	Severe Thunderstorm Warning	OAX	55 min
May 28, 7:53 PM CDT	Severe Thunderstorm Warning	OAX	67 min
Jun 8, 11:48 PM CDT	Special Weather Statement	OAX	27 min
Jun 9, 12:16 AM CDT	Special Weather Statement	OAX	29 min
Jun 14, 8:46 PM CDT	Mesoscale Discussion	SPC	119 min
Jun 14, 10:57 PM CDT	Severe Thunderstorm Warning	OAX	33 min
Jun 14, 11:24 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 15, 12:13 AM CDT	Special Weather Statement	OAX	32 min
Jun 15, 12:46 AM CDT	Special Weather Statement	OAX	44 min
Jun 18, 4:18 AM CDT	Flood Watch	OAX	16 hr
Jun 20, 8:14 PM CDT	Mesoscale Discussion	SPC	91 min
Jun 20, 9:44 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 21, 2:00 AM CDT	Severe Thunderstorm Warning	OAX	45 min
Jun 21, 2:39 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 21, 2:40 AM CDT	Severe Thunderstorm Warning	OAX	50 min
Jun 21, 4:34 AM CDT	Mesoscale Discussion	SPC	86 min
Jun 21, 6:16 AM CDT	Severe Thunderstorm Warning	OAX	29 min
Jun 21, 6:43 AM CDT	Severe Thunderstorm Warning	OAX	32 min
Jun 21, 6:57 AM CDT	Severe Thunderstorm Warning	OAX	33 min
Jun 21, 7:26 AM CDT	Mesoscale Discussion	SPC	94 min
Jun 22, 5:18 AM CDT	Mesoscale Discussion	SPC	87 min
Jun 22, 5:38 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 25, 1:58 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 25, 3:08 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
Jun 25, 5:59 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 26, 2:26 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 26, 6:28 AM CDT	Special Weather Statement	OAX	32 min
Jun 26, 6:34 AM CDT	Mesoscale Discussion	SPC	116 min
Jun 26, 6:38 AM CDT	Severe Thunderstorm Warning	OAX	52 min
Jun 28, 3:01 PM CDT	Heat Advisory	OAX	30 hr
Jun 29, 2:55 AM CDT	Heat Advisory	OAX	41 hr
Jul 5, 4:06 AM CDT	Special Weather Statement	OAX	54 min
Jul 5, 4:54 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 9, 2:52 AM CDT	Special Weather Statement	OAX	38 min
Jul 10, 5:28 AM CDT	Special Weather Statement	OAX	32 min
Jul 10, 5:33 AM CDT	Severe Thunderstorm Warning	OAX	27 min
Jul 10, 5:59 AM CDT	Severe Thunderstorm Warning	OAX	31 min
Jul 15, 3:48 PM CDT	Excessive Heat Watch	OAX	5 hr
Jul 15, 3:48 PM CDT	Excessive Heat Watch	OAX	5 hr
Jul 15, 3:48 PM CDT	Excessive Heat Watch	OAX	36 hr
Jul 16, 3:56 PM CDT	Excessive Heat Warning	OAX	4 days
Jul 20, 11:01 PM CDT	Mesoscale Discussion	SPC	119 min
Aug 1, 3:10 PM CDT	Flash Flood Watch	OAX	21 hr
Aug 7, 3:27 AM CDT	Special Weather Statement	OAX	48 min
Aug 7, 4:08 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 7, 4:16 AM CDT	Special Weather Statement	OAX	59 min
Aug 11, 2:47 PM CDT	Flash Flood Watch	OAX	14 hr
Aug 11, 9:11 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 11, 9:40 PM CDT	Severe Thunderstorm Watch PDS	SPC	7 hr
Aug 11, 11:30 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 12, 1:15 AM CDT	Mesoscale Discussion	SPC	90 min
Aug 12, 1:19 AM CDT	Severe Thunderstorm Warning	OAX	56 min
Aug 15, 11:03 AM CDT	Special Weather Statement	OAX	42 min
Aug 15, 11:11 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 16, 11:40 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 17, 2:40 AM CDT	Mesoscale Discussion	SPC	95 min
Aug 17, 4:40 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 20, 10:18 AM CDT	Heat Advisory	OAX	11 hr
Aug 21, 1:45 AM CDT	Special Weather Statement	OAX	30 min
Aug 26, 5:44 AM CDT	Mesoscale Discussion	SPC	91 min
Aug 26, 6:01 AM CDT	Special Weather Statement	OAX	29 min
Aug 26, 7:45 AM CDT	Special Weather Statement	OAX	45 min
Aug 26, 7:57 AM CDT	Severe Thunderstorm Warning	OAX	33 min
Aug 26, 8:23 AM CDT	Severe Thunderstorm Warning	OAX	40 min
Aug 29, 7:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 29, 7:50 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 29, 9:52 PM CDT	Mesoscale Discussion	SPC	83 min
Sep 1, 5:51 AM CDT	Dense Fog Advisory	OAX	4 hr
Sep 7, 8:46 PM CDT	Mesoscale Discussion	SPC	59 min
Sep 7, 9:06 PM CDT	Severe Thunderstorm Warning	OAX	24 min
Sep 7, 9:26 PM CDT	Severe Thunderstorm Warning	OAX	49 min
Sep 8, 7:06 AM CDT	Dense Fog Advisory	OAX	114 min
Sep 14, 6:15 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 20, 4:01 PM CDT	Flash Flood Watch	OAX	42 hr
Sep 21, 3:29 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 21, 5:07 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Sep 21, 7:22 PM CDT	Severe Thunderstorm Warning	OAX	38 min
Sep 21, 7:25 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 21, 7:48 PM CDT	Special Weather Statement	OAX	27 min
Sep 21, 9:17 PM CDT	Areal Flood Advisory	OAX	6 hr
Sep 21, 10:32 PM CDT	Mesoscale Discussion	SPC	118 min
Sep 22, 3:12 AM CDT	Areal Flood Advisory	OAX	6 hr
Sep 24, 5:30 PM CDT	Mesoscale Discussion	SPC	60 min
Sep 24, 5:42 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Sep 24, 7:59 PM CDT	Severe Thunderstorm Warning	OAX	21 min
Sep 24, 8:36 PM CDT	Mesoscale Discussion	SPC	84 min
Sep 30, 3:58 AM CDT	Flash Flood Watch	OAX	41 hr
Oct 1, 2:45 PM CDT	Tornado Watch	SPC	7 hr
Oct 1, 3:32 PM CDT	Areal Flood Warning	OAX	5 hr
Oct 1, 8:35 PM CDT	Flood Watch	OAX	9 hr
Oct 2, 12:49 AM CDT	River Flood Warning	OAX	19 hr
Oct 9, 3:11 AM CDT	Freeze Watch	OAX	12 hr
Oct 9, 3:33 PM CDT	Freeze Warning	OAX	42 hr
Oct 11, 4:12 AM CDT	Freeze Warning	OAX	30 hr
Oct 18, 3:47 AM CDT	Wind Advisory	OAX	14 hr
Oct 21, 3:42 AM CDT	Wind Advisory	OAX	30 hr
Oct 29, 3:37 AM CDT	Winter Weather Advisory	OAX	42 hr
Nov 26, 4:00 AM CST	Wind Advisory	OAX	29 hr
Nov 27, 4:07 PM CST	Winter Weather Advisory	OAX	47 hr
Nov 30, 3:20 AM CST	Wind Advisory	OAX	33 hr
Dec 9, 1:30 AM CST	Wind Advisory	OAX	9 hr
Dec 14, 3:26 AM CST	Winter Weather Advisory	OAX	38 hr
Dec 28, 9:33 AM CST	Flood Watch	OAX	10 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	26
Severe Thunderstorm Watch	18
Tornado Watch	2
Mesoscale Discussion	46
Special Weather Statement	20
Flooding
Areal Flood Warning	7
Flash Flood Warning	1
River Flood Warning	3
Flash Flood Watch	9
Flood Watch	4
Areal Flood Advisory	4
Winter
Blizzard Warning	1
Winter Storm Warning	2
Winter Storm Watch	2
Winter Weather Advisory	14
Heat
Excessive Heat Warning	1
Excessive Heat Watch	3
Heat Advisory	3
Cold
Freeze Warning	2
Freeze Watch	1
Frost Advisory	1
Wind Chill Advisory	4
Wind and dust
High Wind Warning	1
Wind Advisory	11
Fog and smoke
Dense Fog Advisory	8

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.