Alert archive / Nebraska / Hamilton County

Weather alerts in Hamilton County, Nebraska, 2009

155 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Hamilton County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts: 155
Warnings: 36
Watches: 23
Advisories: 42
Busiest month: June47 alerts
Busiest day: June 18, 200911 alerts

Over time

By month

Warning verification

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

4 of 5 tornado warnings covering Hamilton County in 2009 had a tornado report inside them; 5 of 5 tornado reports fell inside a warning, on average 14 minutes after it went out.

Hamilton County, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	5	4	20%	5	100%	14 min
Severe thunderstorm warnings	20	14	30%	10	90%	22 min
Flash flood warnings	1	0	100%	0

Each office's whole area, 2009

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Hastings, NE: tornado warnings	20	10	50%	17	94%	18 min
NWS Hastings, NE: severe thunderstorm warnings	216	135	38%	256	88%	19 min
NWS Hastings, NE: flash flood warnings	5	2	60%	5	100%	49 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 3, 10:02 AM CST	Freezing Rain Advisory	GID	4 hr
Jan 9, 3:49 AM CST	Wind Advisory	GID	14 hr
Jan 11, 2:28 PM CST	Wind Advisory	GID	24 hr
Jan 12, 4:18 AM CST	High Wind Warning	GID	14 hr
Jan 14, 8:50 AM CST	Wind Chill Advisory	GID	23 hr
Jan 19, 3:31 AM CST	Wind Advisory	GID	14 hr
Jan 24, 3:01 PM CST	Winter Weather Advisory	GID	36 hr
Feb 8, 2:52 PM CST	Wind Advisory	GID	31 hr
Feb 11, 10:22 AM CST	Winter Storm Watch	GID	26 hr
Feb 12, 12:24 PM CST	Winter Storm Warning	GID	27 hr
Feb 13, 6:18 AM CST	Mesoscale Discussion	SPC	4 hr
Feb 13, 11:07 AM CST	Mesoscale Discussion	SPC	3 hr
Feb 20, 3:32 PM CST	Wind Advisory	GID	12 hr
Feb 27, 3:51 AM CST	Winter Weather Advisory	GID	20 hr
Feb 27, 11:25 AM CST	Mesoscale Discussion	SPC	4 hr
Feb 27, 6:22 PM CST	Mesoscale Discussion	SPC	4 hr
Mar 7, 4:38 AM CST	Winter Weather Advisory	GID	23 hr
Mar 9, 3:31 PM CDT	Winter Weather Advisory	GID	20 hr
Mar 22, 4:11 AM CDT	Wind Advisory	GID	16 hr
Mar 22, 3:08 PM CDT	Wind Advisory	GID	30 hr
Mar 23, 10:13 AM CDT	Mesoscale Discussion	SPC	2 hr
Mar 23, 10:48 AM CDT	High Wind Warning	GID	10 hr
Mar 23, 12:16 PM CDT	Tornado Watch	SPC	4 hr
Mar 23, 2:01 PM CDT	Severe Thunderstorm Warning	GID	24 min
Mar 23, 3:11 PM CDT	Mesoscale Discussion	SPC	94 min
Mar 24, 4:04 AM CDT	Wind Advisory	GID	16 hr
Mar 30, 3:05 PM CDT	Wind Advisory	GID	28 hr
Apr 2, 3:31 PM CDT	Winter Storm Watch	GID	36 hr
Apr 4, 3:31 AM CDT	Wind Advisory	GID	39 hr
Apr 4, 3:39 AM CDT	Winter Storm Warning	GID	24 hr
Apr 4, 3:39 AM CDT	Winter Weather Advisory	GID	31 hr
Apr 4, 2:06 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 4, 3:52 PM CDT	Mesoscale Discussion	SPC	53 min
Apr 4, 5:00 PM CDT	Tornado Warning	GID	30 min
Apr 20, 2:06 PM CDT	Red Flag Warning	GID	4 hr
Apr 26, 9:18 AM CDT	Mesoscale Discussion	SPC	27 min
Apr 26, 9:34 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
May 6, 4:18 AM CDT	Special Weather Statement	GID	27 min
May 11, 3:32 AM CDT	Dense Fog Advisory	GID	5 hr
May 13, 3:09 AM CDT	Severe Thunderstorm Warning	GID	36 min
May 13, 3:31 AM CDT	Severe Thunderstorm Warning	GID	29 min
May 15, 7:14 AM CDT	Mesoscale Discussion	SPC	91 min
May 15, 3:02 PM CDT	Wind Advisory	GID	5 hr
May 19, 3:23 AM CDT	Wind Advisory	GID	18 hr
May 20, 3:23 AM CDT	Wind Advisory	GID	17 hr
May 23, 6:23 PM CDT	Special Weather Statement	GID	22 min
May 25, 9:10 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 1, 2:55 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 1, 3:16 PM CDT	Flash Flood Watch	GID	13 hr
Jun 5, 9:38 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 5, 11:26 PM CDT	Severe Thunderstorm Warning	GID	64 min
Jun 5, 11:53 PM CDT	Mesoscale Discussion	SPC	97 min
Jun 6, 1:47 AM CDT	Severe Thunderstorm Warning	GID	43 min
Jun 6, 2:22 AM CDT	Mesoscale Discussion	SPC	23 min
Jun 7, 12:55 AM CDT	Special Weather Statement	GID	35 min
Jun 7, 8:13 PM CDT	Mesoscale Discussion	SPC	62 min
Jun 8, 12:34 AM CDT	Severe Thunderstorm Watch	SPC	1 min
Jun 15, 3:34 PM CDT	Tornado Watch	SPC	8 hr
Jun 15, 6:19 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 15, 7:33 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 15, 9:32 PM CDT	Mesoscale Discussion	SPC	88 min
Jun 15, 11:15 PM CDT	Special Weather Statement	GID	45 min
Jun 17, 12:52 PM CDT	Tornado Watch	SPC	8 hr
Jun 17, 2:47 PM CDT	Mesoscale Discussion	SPC	28 min
Jun 17, 5:43 PM CDT	Mesoscale Discussion	SPC	92 min
Jun 17, 8:04 PM CDT	Mesoscale Discussion	SPC	56 min
Jun 17, 8:07 PM CDT	Severe Thunderstorm Warning	GID	38 min
Jun 17, 8:42 PM CDT	Tornado Warning	GID	33 min
Jun 17, 8:46 PM CDT	Severe Thunderstorm Warning Emergency	GID	44 min
Jun 17, 8:48 PM CDT	Severe Thunderstorm Warning	GID	42 min
Jun 17, 8:55 PM CDT	Severe Thunderstorm Warning	GID	50 min
Jun 17, 8:58 PM CDT	Tornado Warning Emergency	GID	32 min
Jun 17, 9:04 PM CDT	Tornado Watch	SPC	3 hr
Jun 17, 9:22 PM CDT	Tornado Warning Emergency	GID	23 min
Jun 17, 9:29 PM CDT	Severe Thunderstorm Warning	GID	35 min
Jun 17, 11:33 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 18, 11:12 PM CDT	Mesoscale Discussion	SPC	93 min
Jun 18, 11:55 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 19, 12:54 AM CDT	Severe Thunderstorm Warning	GID	51 min
Jun 19, 1:35 AM CDT	Severe Thunderstorm Warning	GID	40 min
Jun 19, 1:42 AM CDT	Areal Flood Advisory	GID	4 hr
Jun 19, 1:42 AM CDT	Severe Thunderstorm Warning	GID	47 min
Jun 19, 2:08 AM CDT	Severe Thunderstorm Warning	GID	37 min
Jun 19, 3:11 AM CDT	Flash Flood Warning	GID	6 hr
Jun 22, 3:31 AM CDT	Heat Advisory	GID	15 hr
Jun 23, 3:39 AM CDT	Dense Fog Advisory	GID	3 hr
Jun 23, 3:39 AM CDT	Heat Advisory	GID	17 hr
Jun 23, 3:21 PM CDT	Mesoscale Discussion	SPC	54 min
Jun 23, 3:28 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 24, 3:36 PM CDT	Mesoscale Discussion	SPC	114 min
Jun 24, 8:56 PM CDT	Severe Thunderstorm Warning	GID	34 min
Jun 24, 9:27 PM CDT	Severe Thunderstorm Warning	GID	23 min
Jun 26, 8:19 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 26, 9:05 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jul 3, 3:43 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 3, 4:54 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 3, 7:00 PM CDT	Special Weather Statement	GID	30 min
Jul 3, 9:20 PM CDT	Mesoscale Discussion	SPC	55 min
Jul 14, 3:50 PM CDT	Mesoscale Discussion	SPC	85 min
Jul 16, 4:12 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 16, 8:32 AM CDT	Special Weather Statement	GID	28 min
Jul 16, 9:00 AM CDT	Special Weather Statement	GID	45 min
Jul 22, 2:55 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 22, 6:47 PM CDT	Mesoscale Discussion	SPC	88 min
Jul 24, 5:37 PM CDT	Mesoscale Discussion	SPC	53 min
Jul 24, 8:10 PM CDT	Severe Thunderstorm Warning	GID	28 min
Jul 31, 5:39 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 31, 7:43 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 3, 10:40 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 4, 1:10 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 4, 2:30 AM CDT	Severe Thunderstorm Warning	GID	45 min
Aug 4, 2:42 AM CDT	Severe Thunderstorm Warning	GID	48 min
Aug 4, 3:07 AM CDT	Severe Thunderstorm Warning	GID	38 min
Aug 4, 11:37 PM CDT	Mesoscale Discussion	SPC	83 min
Aug 7, 1:23 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 7, 3:55 PM CDT	Mesoscale Discussion	SPC	95 min
Aug 9, 5:01 AM CDT	Mesoscale Discussion	SPC	59 min
Aug 9, 5:16 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 9, 6:30 AM CDT	Mesoscale Discussion	SPC	2 hr
Aug 19, 2:46 PM CDT	Mesoscale Discussion	SPC	119 min
Aug 19, 5:19 PM CDT	Mesoscale Discussion	SPC	26 min
Aug 19, 5:32 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 26, 6:36 AM CDT	Areal Flood Advisory	GID	4 hr
Aug 26, 10:49 AM CDT	Areal Flood Warning	GID	47 hr
Sep 3, 2:24 PM CDT	Mesoscale Discussion	SPC	2 hr
Sep 3, 5:07 PM CDT	Mesoscale Discussion	SPC	83 min
Sep 5, 3:51 AM CDT	Dense Fog Advisory	GID	7 hr
Sep 10, 3:30 AM CDT	Dense Fog Advisory	GID	7 hr
Sep 26, 3:00 PM CDT	Wind Advisory	GID	27 hr
Sep 28, 4:02 AM CDT	Frost Advisory	GID	29 hr
Sep 30, 3:22 PM CDT	Wind Advisory	GID	28 hr
Oct 1, 2:46 PM CDT	Wind Advisory	GID	29 hr
Oct 4, 12:53 AM CDT	Freeze Warning	GID	7 hr
Oct 10, 3:29 AM CDT	Winter Weather Advisory	GID	9 hr
Oct 10, 5:56 AM CDT	Mesoscale Discussion	SPC	5 hr
Oct 11, 3:19 PM CDT	Winter Weather Advisory	GID	19 hr
Oct 20, 8:00 AM CDT	Dense Fog Advisory	GID	4 hr
Nov 22, 7:56 PM CST	Dense Fog Advisory	GID	15 hr
Dec 6, 4:04 AM CST	Winter Storm Watch	GID	24 hr
Dec 6, 4:04 AM CST	Winter Weather Advisory	GID	17 hr
Dec 6, 11:12 AM CST	Mesoscale Discussion	SPC	4 hr
Dec 7, 3:51 AM CST	Winter Storm Warning	GID	48 hr
Dec 8, 11:22 AM CST	Mesoscale Discussion	SPC	5 hr
Dec 8, 9:38 PM CST	Mesoscale Discussion	SPC	6 hr
Dec 8, 9:58 PM CST	Wind Chill Advisory	GID	13 hr
Dec 9, 3:41 PM CST	Wind Chill Advisory	GID	18 hr
Dec 13, 5:46 PM CST	Freezing Fog Advisory	GID	3 hr
Dec 13, 8:24 PM CST	Winter Weather Advisory	GID	7 hr
Dec 21, 3:56 AM CST	Winter Storm Watch	GID	24 hr
Dec 21, 3:38 PM CST	Blizzard Watch	GID	46 hr
Dec 22, 3:49 AM CST	Winter Storm Warning	GID	48 hr
Dec 24, 4:03 AM CST	Winter Weather Advisory	GID	3 days
Dec 24, 3:30 PM CST	Winter Storm Warning	GID	12 hr
Dec 24, 9:53 PM CST	Blizzard Warning	GID	32 hr
Dec 25, 7:21 AM CST	Mesoscale Discussion	SPC	5 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	20
Tornado Warning	4
Severe Thunderstorm Watch	13
Tornado Watch	4
Mesoscale Discussion	47
Special Weather Statement	7
Flooding
Areal Flood Warning	1
Flash Flood Warning	1
Flash Flood Watch	1
Areal Flood Advisory	2
Winter
Blizzard Warning	1
Winter Storm Warning	5
Blizzard Watch	1
Winter Storm Watch	4
Freezing Rain Advisory	1
Winter Weather Advisory	10
Heat
Heat Advisory	2
Cold
Freeze Warning	1
Frost Advisory	1
Wind Chill Advisory	3
Wind and dust
High Wind Warning	2
Wind Advisory	16
Fire
Red Flag Warning	1
Fog and smoke
Dense Fog Advisory	6
Freezing Fog Advisory	1

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2008 2010

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.