Weather alerts in Cass County, Nebraska, 2024

219 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Cass County and its neighbors

Each county as a circle sized by its count in 2024. Tap one for its archive.

Alerts: 219
Warnings: 78
Watches: 38
Advisories: 51
Busiest month: May42 alerts
Busiest day: May 21, 202413 alerts

Over time

By month

Warning verification

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

6 of 11 tornado warnings covering Cass County in 2024 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Cass County, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	11	6	45%	1	0%
Severe thunderstorm warnings	38	26	32%	23	83%	27 min
Flash flood warnings	2	1	50%	4	50%	39 min

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Omaha, NE: tornado warnings	130	58	55%	152	84%	23 min
NWS Omaha, NE: severe thunderstorm warnings	415	171	59%	586	84%	25 min
NWS Omaha, NE: flash flood warnings	39	18	54%	46	78%	61 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 5, 3:01 PM CST	Winter Storm Watch	OAX	35 hr
Jan 7, 2:28 AM CST	Winter Storm Warning	OAX	58 hr
Jan 8, 9:27 AM CST	Mesoscale Discussion	SPC	3 hr
Jan 10, 2:10 AM CST	Winter Storm Watch	OAX	13 hr
Jan 10, 2:43 AM CST	Wind Chill Watch	OAX	25 hr
Jan 10, 2:43 AM CST	Wind Chill Advisory	OAX	57 hr
Jan 10, 2:40 PM CST	Winter Storm Warning	OAX	3 days
Jan 11, 3:22 AM CST	Wind Chill Warning	OAX	5 days
Jan 11, 3:22 AM CST	Wind Chill Advisory	OAX	23 hr
Jan 17, 3:22 AM CST	Wind Chill Watch	OAX	35 hr
Jan 17, 3:22 AM CST	Wind Chill Advisory	OAX	57 hr
Jan 17, 2:26 PM CST	Winter Weather Advisory	OAX	37 hr
Jan 18, 2:10 PM CST	Wind Chill Advisory	OAX	46 hr
Jan 18, 4:54 PM CST	Snow Squall Warning Significant damage threat	OAX	66 min
Jan 20, 2:25 AM CST	Wind Chill Advisory	OAX	31 hr
Jan 22, 3:02 PM CST	Dense Fog Advisory	OAX	21 hr
Jan 23, 2:55 PM CST	Dense Fog Advisory	OAX	21 hr
Jan 24, 1:46 PM CST	Dense Fog Advisory	OAX	22 hr
Jan 25, 2:18 PM CST	Dense Fog Advisory	OAX	22 hr
Jan 26, 6:39 PM CST	Dense Fog Advisory	OAX	17 hr
Jan 27, 1:36 PM CST	Dense Fog Advisory	OAX	20 hr
Jan 28, 2:18 PM CST	Dense Fog Advisory	OAX	18 hr
Feb 2, 12:04 PM CST	Dense Fog Advisory	OAX	3 days
Feb 2, 9:38 PM CST	Flood Watch	OAX	6 days
Feb 25, 1:47 PM CST	Red Flag Warning	OAX	28 hr
Feb 26, 1:20 PM CST	Wind Advisory	OAX	35 hr
Feb 28, 1:54 PM CST	Red Flag Warning	OAX	30 hr
Mar 2, 4:34 AM CST	Dense Fog Advisory	OAX	5 hr
Mar 2, 3:05 PM CST	Fire Weather Watch	OAX	11 hr
Mar 3, 1:59 AM CST	Red Flag Warning	OAX	16 hr
Mar 10, 3:04 AM CDT	Fire Weather Watch	OAX	24 hr
Mar 24, 2:57 PM CDT	Winter Weather Advisory	OAX	43 hr
Apr 5, 3:52 AM CDT	Fire Weather Watch	OAX	11 hr
Apr 5, 2:27 PM CDT	Red Flag Warning	OAX	31 hr
Apr 5, 2:34 PM CDT	High Wind Warning	OAX	31 hr
Apr 5, 2:34 PM CDT	Wind Advisory	OAX	26 hr
Apr 6, 5:03 PM CDT	Mesoscale Discussion	SPC	87 min
Apr 9, 3:08 PM CDT	Fire Weather Watch	OAX	30 hr
Apr 10, 3:40 PM CDT	Red Flag Warning	OAX	28 hr
Apr 15, 9:07 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 16, 2:14 AM CDT	Tornado Watch	SPC	6 hr
Apr 16, 6:00 AM CDT	Mesoscale Discussion	SPC	2 hr
Apr 18, 2:40 PM CDT	Frost Advisory	OAX	17 hr
Apr 19, 2:18 PM CDT	Freeze Warning	OAX	18 hr
Apr 20, 2:03 PM CDT	Freeze Warning	OAX	18 hr
Apr 22, 2:18 AM CDT	Wind Advisory	OAX	16 hr
Apr 26, 12:21 PM CDT	Mesoscale Discussion	SPC	54 min
Apr 26, 12:52 PM CDT	Tornado Watch	SPC	6 hr
Apr 26, 2:31 PM CDT	Tornado Warning	OAX	44 min
Apr 26, 2:31 PM CDT	Mesoscale Discussion	SPC	89 min
Apr 26, 3:03 PM CDT	Tornado Warning EmergencyTornado observed	OAX	42 min
Apr 26, 3:14 PM CDT	Mesoscale Discussion	SPC	61 min
Apr 26, 3:43 PM CDT	Tornado Warning	OAX	47 min
Apr 26, 3:59 PM CDT	Tornado Warning	OAX	46 min
Apr 26, 4:19 PM CDT	Tornado Warning	OAX	41 min
Apr 26, 4:26 PM CDT	Tornado Warning	OAX	49 min
Apr 27, 3:29 AM CDT	Flood Watch	OAX	18 hr
Apr 30, 7:10 AM CDT	Severe Thunderstorm Warning	OAX	16 min
Apr 30, 1:05 PM CDT	Mesoscale Discussion	SPC	85 min
Apr 30, 1:33 PM CDT	Tornado Watch	SPC	8 hr
Apr 30, 2:21 PM CDT	Severe Thunderstorm Warning	OAX	39 min
Apr 30, 2:56 PM CDT	Severe Thunderstorm Warning	OAX	49 min
Apr 30, 3:57 PM CDT	Mesoscale Discussion	SPC	93 min
Apr 30, 6:54 PM CDT	Mesoscale Discussion	SPC	96 min
May 2, 2:38 AM CDT	Mesoscale Discussion	SPC	67 min
May 2, 2:59 AM CDT	Severe Thunderstorm Warning	OAX	46 min
May 3, 3:53 AM CDT	Dense Fog Advisory	OAX	4 hr
May 3, 8:03 AM CDT	Dense Fog Advisory	OAX	57 min
May 6, 3:07 PM CDT	Mesoscale Discussion	SPC	113 min
May 6, 3:49 PM CDT	Tornado Watch	SPC	8 hr
May 6, 5:27 PM CDT	Mesoscale Discussion	SPC	93 min
May 6, 7:47 PM CDT	Severe Thunderstorm Warning	OAX	43 min
May 6, 8:02 PM CDT	Tornado Warning	OAX	11 min
May 6, 8:06 PM CDT	Mesoscale Discussion	SPC	84 min
May 6, 8:27 PM CDT	Severe Thunderstorm Warning	OAX	63 min
May 8, 2:17 PM CDT	Mesoscale Discussion	SPC	88 min
May 19, 6:26 AM CDT	Severe Thunderstorm Warning	OAX	34 min
May 19, 6:54 AM CDT	Severe Thunderstorm Warning	OAX	36 min
May 19, 7:29 AM CDT	Severe Thunderstorm Warning	OAX	7 min
May 19, 6:17 PM CDT	Severe Thunderstorm Warning	OAX	43 min
May 20, 1:45 PM CDT	Flood Watch	OAX	25 hr
May 20, 6:06 PM CDT	Mesoscale Discussion	SPC	114 min
May 20, 6:31 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 20, 10:01 PM CDT	Mesoscale Discussion	SPC	119 min
May 20, 11:33 PM CDT	Severe Thunderstorm Watch	SPC	9 hr
May 21, 2:04 AM CDT	Mesoscale Discussion	SPC	116 min
May 21, 4:08 AM CDT	Mesoscale Discussion	SPC	2 hr
May 21, 5:51 AM CDT	Mesoscale Discussion	SPC	114 min
May 21, 6:15 AM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	45 min
May 21, 10:03 AM CDT	River Flood Warning	OAX	55 hr
May 21, 10:27 AM CDT	Mesoscale Discussion	SPC	2 hr
May 21, 11:10 AM CDT	Tornado Watch	SPC	5 hr
May 21, 1:01 PM CDT	Severe Thunderstorm Warning	OAX	59 min
May 21, 1:15 PM CDT	Tornado Warning	OAX	45 min
May 21, 1:34 PM CDT	Severe Thunderstorm Warning	OAX	26 min
May 21, 1:43 PM CDT	Tornado Warning	OAX	47 min
May 23, 8:43 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 23, 10:38 PM CDT	Mesoscale Discussion	SPC	2 hr
May 24, 1:15 AM CDT	Mesoscale Discussion	SPC	2 hr
May 24, 1:53 AM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	52 min
May 24, 1:57 AM CDT	Tornado Warning	OAX	48 min
May 24, 2:28 AM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	47 min
May 24, 2:35 AM CDT	Tornado Warning	OAX	40 min
May 25, 9:46 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
May 25, 11:38 PM CDT	Special Weather Statement	OAX	22 min
May 25, 11:53 PM CDT	High Wind Warning	OAX	67 min
Jun 2, 2:54 AM CDT	Mesoscale Discussion	SPC	96 min
Jun 7, 5:02 PM CDT	Mesoscale Discussion	SPC	118 min
Jun 7, 5:52 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 7, 8:08 PM CDT	Severe Thunderstorm Warning	OAX	67 min
Jun 7, 9:12 PM CDT	Special Weather Statement	OAX	33 min
Jun 7, 9:59 PM CDT	Special Weather Statement	OAX	16 min
Jun 12, 6:17 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 12, 7:26 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 12, 8:53 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	52 min
Jun 12, 9:40 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	50 min
Jun 15, 3:14 AM CDT	Special Weather Statement	OAX	31 min
Jun 15, 3:37 AM CDT	Special Weather Statement	OAX	23 min
Jun 15, 3:05 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 15, 3:52 PM CDT	Tornado Watch	SPC	6 hr
Jun 15, 5:43 PM CDT	Severe Thunderstorm Warning	OAX	32 min
Jun 15, 5:44 PM CDT	Mesoscale Discussion	SPC	91 min
Jun 15, 7:03 PM CDT	Severe Thunderstorm Warning	OAX	42 min
Jun 15, 7:29 PM CDT	Severe Thunderstorm Warning	OAX	46 min
Jun 17, 8:44 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 18, 12:54 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 18, 1:47 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 18, 5:51 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 18, 6:25 PM CDT	Special Weather Statement	OAX	50 min
Jun 21, 11:28 AM CDT	River Flood Watch	OAX	25 hr
Jun 22, 12:31 PM CDT	River Flood Warning	OAX	13 days
Jun 23, 2:38 AM CDT	Heat Advisory	OAX	41 hr
Jun 23, 9:07 AM CDT	River Flood Warning	OAX	22 hr
Jun 24, 2:21 AM CDT	Heat Advisory	OAX	41 hr
Jun 24, 8:56 AM CDT	Excessive Heat Warning	OAX	11 hr
Jun 25, 4:54 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 25, 5:17 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 25, 5:39 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	51 min
Jun 25, 5:48 PM CDT	Severe Thunderstorm Warning Destructive damage threat	OAX	42 min
Jun 25, 6:00 PM CDT	Severe Thunderstorm Warning Destructive damage threat	OAX	60 min
Jun 25, 6:26 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	34 min
Jun 25, 6:56 PM CDT	Severe Thunderstorm Warning	OAX	37 min
Jun 25, 7:09 PM CDT	Mesoscale Discussion	SPC	66 min
Jun 25, 11:13 PM CDT	Mesoscale Discussion	SPC	62 min
Jun 25, 11:42 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 26, 12:58 AM CDT	Severe Thunderstorm Warning	OAX	47 min
Jul 1, 12:04 PM CDT	Flood Watch	OAX	17 hr
Jul 1, 6:43 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 1, 10:48 PM CDT	Severe Thunderstorm Warning	OAX	42 min
Jul 1, 10:56 PM CDT	Areal Flood Advisory	OAX	4 hr
Jul 1, 11:03 PM CDT	Mesoscale Discussion	SPC	87 min
Jul 1, 11:41 PM CDT	Areal Flood Advisory	OAX	3 hr
Jul 1, 11:46 PM CDT	Severe Thunderstorm Warning	OAX	44 min
Jul 2, 12:27 AM CDT	Severe Thunderstorm Warning	OAX	48 min
Jul 2, 12:39 AM CDT	Areal Flood Advisory	OAX	118 min
Jul 2, 12:45 AM CDT	Areal Flood Advisory	OAX	112 min
Jul 2, 1:18 AM CDT	Severe Thunderstorm Warning	OAX	42 min
Jul 2, 1:32 AM CDT	Flash Flood Warning	OAX	5 hr
Jul 2, 2:15 AM CDT	Flash Flood Warning EmergencyCatastrophic damage threat	OAX	3 hr
Jul 2, 2:35 AM CDT	Areal Flood Warning	OAX	17 hr
Jul 2, 4:47 AM CDT	River Flood Warning	OAX	16 hr
Jul 6, 5:00 PM CDT	Mesoscale Discussion	SPC	60 min
Jul 6, 5:17 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 6, 7:06 PM CDT	Severe Thunderstorm Warning	OAX	54 min
Jul 10, 2:12 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 10, 2:44 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 10, 5:04 PM CDT	Mesoscale Discussion	SPC	86 min
Jul 12, 2:37 AM CDT	Excessive Heat Watch	OAX	24 hr
Jul 12, 1:57 PM CDT	Heat Advisory	OAX	30 hr
Jul 13, 2:56 AM CDT	Excessive Heat Warning	OAX	65 hr
Jul 21, 3:37 AM CDT	Dense Fog Advisory	OAX	7 hr
Jul 28, 1:11 PM CDT	Heat Advisory	OAX	31 hr
Jul 28, 2:21 PM CDT	Excessive Heat Watch	OAX	24 hr
Jul 29, 2:35 PM CDT	Excessive Heat Warning	OAX	52 hr
Jul 29, 2:35 PM CDT	Heat Advisory	OAX	29 hr
Jul 31, 2:21 PM CDT	Mesoscale Discussion	SPC	114 min
Jul 31, 3:00 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 31, 4:55 PM CDT	Severe Thunderstorm Warning Destructive damage threat	OAX	65 min
Jul 31, 5:12 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OAX	63 min
Jul 31, 5:37 PM CDT	Severe Thunderstorm Warning Destructive damage threat	OAX	53 min
Aug 4, 3:12 AM CDT	Heat Advisory	OAX	17 hr
Aug 14, 3:17 AM CDT	Areal Flood Advisory	OAX	3 hr
Aug 14, 3:57 PM CDT	Mesoscale Discussion	SPC	3 hr
Aug 14, 5:10 PM CDT	Flood Watch	OAX	9 hr
Aug 14, 5:34 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 14, 7:33 PM CDT	Severe Thunderstorm Warning	OAX	31 min
Aug 14, 9:20 PM CDT	Mesoscale Discussion	SPC	115 min
Aug 23, 1:46 PM CDT	Heat Advisory	OAX	54 hr
Aug 24, 1:29 PM CDT	Excessive Heat Warning	OAX	31 hr
Aug 25, 2:38 AM CDT	Heat Advisory	OAX	41 hr
Aug 29, 2:35 PM CDT	Mesoscale Discussion	SPC	115 min
Aug 29, 4:12 PM CDT	Special Weather Statement	OAX	48 min
Aug 29, 4:53 PM CDT	Special Weather Statement	OAX	37 min
Oct 4, 2:13 PM CDT	Red Flag Warning	OAX	30 hr
Oct 13, 2:22 AM CDT	Frost Advisory	OAX	31 hr
Oct 14, 2:55 AM CDT	Freeze Watch	OAX	11 hr
Oct 14, 1:59 PM CDT	Freeze Warning	OAX	43 hr
Oct 15, 2:39 PM CDT	Fire Weather Watch	OAX	21 hr
Oct 16, 11:34 AM CDT	Red Flag Warning	OAX	31 hr
Oct 28, 2:33 AM CDT	Wind Advisory	OAX	49 hr
Oct 28, 2:36 AM CDT	Fire Weather Watch	OAX	11 hr
Oct 28, 1:53 PM CDT	Red Flag Warning	OAX	30 hr
Oct 30, 10:36 AM CDT	Severe Thunderstorm Warning	OAX	24 min
Oct 30, 11:06 AM CDT	Special Weather Statement	OAX	24 min
Oct 30, 11:24 AM CDT	Severe Thunderstorm Warning	OAX	25 min
Nov 3, 5:34 AM CST	Dense Fog Advisory	OAX	6 hr
Nov 5, 11:50 PM CST	Dense Fog Advisory	OAX	10 hr
Nov 19, 1:45 AM CST	Wind Advisory	OAX	40 hr
Nov 20, 2:54 AM CST	Red Flag Warning	OAX	14 hr
Dec 12, 2:35 PM CST	Winter Weather Advisory	OAX	48 hr
Dec 14, 7:21 PM CST	Dense Fog Advisory	OAX	16 hr
Dec 15, 9:47 PM CST	Dense Fog Advisory	OAX	8 hr
Dec 18, 2:37 PM CST	Wind Advisory	OAX	27 hr
Dec 24, 2:11 PM CST	Dense Fog Advisory	OAX	23 hr
Dec 25, 2:17 PM CST	Dense Fog Advisory	OAX	23 hr
Dec 26, 1:07 PM CST	Dense Fog Advisory	OAX	22 hr
Dec 27, 8:30 PM CST	Dense Fog Advisory	OAX	16 hr
Dec 28, 4:54 PM CST	Dense Fog Advisory	OAX	19 hr
Dec 29, 5:59 PM CST	Dense Fog Advisory	OAX	13 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	38
Tornado Warning	11
Severe Thunderstorm Watch	13
Tornado Watch	6
Mesoscale Discussion	43
Special Weather Statement	9
Flooding
Areal Flood Warning	1
Flash Flood Warning	2
River Flood Warning	4
Flood Watch	5
River Flood Watch	1
Areal Flood Advisory	5
Winter
Snow Squall Warning	1
Winter Storm Warning	2
Winter Storm Watch	2
Winter Weather Advisory	3
Heat
Excessive Heat Warning	4
Excessive Heat Watch	2
Heat Advisory	8
Cold
Freeze Warning	3
Wind Chill Warning	1
Freeze Watch	1
Wind Chill Watch	2
Frost Advisory	2
Wind Chill Advisory	5
Wind and dust
High Wind Warning	2
Wind Advisory	6
Fire
Red Flag Warning	9
Fire Weather Watch	6
Fog and smoke
Dense Fog Advisory	22

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2023 2025

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.