Alert archive / Nebraska / Cheyenne County

Weather alerts in Cheyenne County, Nebraska, 2010

161 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Cheyenne County and its neighbors

Each county as a circle sized by its count in 2010. Tap one for its archive.

Alerts: 161
Warnings: 44
Watches: 29
Advisories: 42
Busiest month: June38 alerts
Busiest day: July 6, 20108 alerts

Over time

By month

Warning verification

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

0 of 8 tornado warnings covering Cheyenne County in 2010 had a tornado report inside them; 0 of 2 tornado reports fell inside a warning.

Cheyenne County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	8	0	100%	2	0%
Severe thunderstorm warnings	19	9	53%	40	48%	18 min
Flash flood warnings	3	3	0%	7	86%	104 min

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Cheyenne, WY: tornado warnings	44	20	55%	47	72%	15 min
NWS Cheyenne, WY: severe thunderstorm warnings	180	94	48%	354	71%	23 min
NWS Cheyenne, WY: flash flood warnings	17	9	47%	40	83%	57 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 5, 4:27 AM MST	Winter Weather Advisory	CYS	38 hr
Jan 6, 2:38 PM MST	Wind Chill Warning	CYS	12 hr
Jan 7, 2:45 AM MST	Wind Chill Advisory	CYS	6 hr
Jan 7, 1:49 PM MST	Wind Chill Warning	CYS	21 hr
Jan 24, 4:03 AM MST	Wind Advisory	CYS	14 hr
Jan 25, 2:08 AM MST	Wind Advisory	CYS	16 hr
Feb 3, 2:16 PM MST	Winter Weather Advisory	CYS	24 hr
Feb 17, 12:14 PM MST	Winter Weather Advisory	CYS	38 hr
Feb 19, 8:54 PM MST	Winter Weather Advisory	CYS	31 hr
Feb 28, 8:27 AM MST	Dense Fog Advisory	CYS	5 hr
Mar 8, 6:47 AM MST	Dense Fog Advisory	CYS	3 hr
Mar 11, 2:40 AM MST	Wind Advisory	CYS	14 hr
Mar 17, 2:35 PM MDT	Winter Storm Watch	CYS	23 hr
Mar 18, 3:27 AM MDT	Winter Weather Advisory	CYS	34 hr
Mar 18, 1:09 PM MDT	Winter Storm Warning	CYS	24 hr
Mar 26, 2:35 PM MDT	Wind Advisory	CYS	26 hr
Apr 3, 5:49 AM MDT	Wind Advisory	CYS	14 hr
Apr 5, 3:15 PM MDT	Winter Weather Advisory	CYS	39 hr
Apr 12, 9:19 PM MDT	Wind Advisory	CYS	20 hr
Apr 13, 11:19 AM MDT	Mesoscale Discussion	SPC	86 min
Apr 22, 4:09 PM MDT	Mesoscale Discussion	SPC	96 min
Apr 23, 4:53 AM MDT	Flood Watch	CYS	16 hr
Apr 23, 1:54 PM MDT	Wind Advisory	CYS	22 hr
Apr 23, 3:10 PM MDT	Mesoscale Discussion	SPC	95 min
May 3, 10:21 AM MDT	High Wind Warning	CYS	33 hr
May 3, 10:21 AM MDT	Wind Advisory	CYS	17 hr
May 6, 4:03 AM MDT	Wind Advisory	CYS	15 hr
May 11, 3:49 AM MDT	Winter Weather Advisory	CYS	34 hr
May 17, 2:16 AM MDT	Dense Fog Advisory	CYS	7 hr
May 18, 11:42 AM MDT	Mesoscale Discussion	SPC	2 hr
May 21, 1:30 PM MDT	Mesoscale Discussion	SPC	60 min
May 21, 2:26 PM MDT	Tornado Watch	SPC	8 hr
May 22, 2:09 PM MDT	Mesoscale Discussion	SPC	96 min
May 23, 10:40 AM MDT	High Wind Watch	CYS	31 hr
May 24, 3:47 AM MDT	High Wind Warning	CYS	16 hr
May 24, 9:44 AM MDT	Mesoscale Discussion	SPC	91 min
May 24, 10:55 AM MDT	Mesoscale Discussion	SPC	95 min
May 24, 11:21 AM MDT	Tornado Watch	SPC	9 hr
May 24, 12:49 PM MDT	Severe Thunderstorm Warning	CYS	56 min
May 24, 1:47 PM MDT	Severe Thunderstorm Warning	CYS	58 min
May 24, 2:33 PM MDT	Mesoscale Discussion	SPC	57 min
May 26, 1:26 PM MDT	Mesoscale Discussion	SPC	64 min
May 26, 1:49 PM MDT	Tornado Watch	SPC	7 hr
May 26, 3:20 PM MDT	Severe Thunderstorm Warning	CYS	43 min
May 26, 4:01 PM MDT	Tornado Warning	CYS	44 min
May 27, 10:47 AM MDT	Wind Advisory	CYS	15 hr
May 28, 5:30 AM MDT	Wind Advisory	CYS	9 hr
May 29, 2:39 PM MDT	Mesoscale Discussion	SPC	36 min
May 29, 2:58 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 1, 5:36 PM MDT	Severe Thunderstorm Warning	CYS	54 min
Jun 6, 1:48 PM MDT	Mesoscale Discussion	SPC	117 min
Jun 6, 2:24 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 6, 6:14 PM MDT	Severe Thunderstorm Warning	CYS	31 min
Jun 6, 8:03 PM MDT	Mesoscale Discussion	SPC	87 min
Jun 7, 1:34 PM MDT	Mesoscale Discussion	SPC	86 min
Jun 7, 3:31 PM MDT	Tornado Watch	SPC	7 hr
Jun 7, 6:23 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 7, 7:07 PM MDT	Severe Thunderstorm Warning	CYS	37 min
Jun 7, 8:24 PM MDT	Severe Thunderstorm Warning	CYS	66 min
Jun 7, 8:42 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 7, 9:12 PM MDT	Areal Flood Advisory	CYS	2 hr
Jun 8, 12:22 AM MDT	Mesoscale Discussion	SPC	113 min
Jun 9, 1:55 PM MDT	Mesoscale Discussion	SPC	65 min
Jun 9, 2:39 PM MDT	Tornado Watch	SPC	6 hr
Jun 9, 8:26 PM MDT	Mesoscale Discussion	SPC	64 min
Jun 10, 6:01 PM MDT	Tornado Watch	SPC	5 hr
Jun 10, 9:37 PM MDT	Mesoscale Discussion	SPC	53 min
Jun 11, 3:01 AM MDT	Flood Watch	CYS	4 days
Jun 11, 1:09 PM MDT	Mesoscale Discussion	SPC	96 min
Jun 11, 5:40 PM MDT	Severe Thunderstorm Warning	CYS	43 min
Jun 11, 5:50 PM MDT	Tornado Warning	CYS	40 min
Jun 11, 6:20 PM MDT	Flash Flood Warning	CYS	4 hr
Jun 11, 10:18 PM MDT	Areal Flood Warning	CYS	6 hr
Jun 12, 3:24 AM MDT	Areal Flood Warning	CYS	5 hr
Jun 16, 3:16 AM MDT	Wind Advisory	CYS	38 hr
Jun 16, 4:01 PM MDT	Tornado Watch	SPC	7 hr
Jun 19, 12:23 AM MDT	Mesoscale Discussion	SPC	67 min
Jun 19, 12:58 AM MDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 19, 4:12 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 20, 1:30 PM MDT	Tornado Watch	SPC	7 hr
Jun 20, 4:23 PM MDT	Mesoscale Discussion	SPC	67 min
Jun 20, 9:18 PM MDT	Mesoscale Discussion	SPC	87 min
Jun 21, 2:08 PM MDT	Tornado Watch	SPC	7 hr
Jun 21, 5:03 PM MDT	Mesoscale Discussion	SPC	87 min
Jun 22, 3:07 PM MDT	Mesoscale Discussion	SPC	83 min
Jun 22, 4:03 PM MDT	Tornado Watch	SPC	7 hr
Jun 22, 5:32 PM MDT	Tornado Warning	CYS	43 min
Jul 3, 12:02 PM MDT	Mesoscale Discussion	SPC	88 min
Jul 3, 2:02 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 3, 5:55 PM MDT	Severe Thunderstorm Warning	CYS	50 min
Jul 3, 6:06 PM MDT	Mesoscale Discussion	SPC	54 min
Jul 3, 6:42 PM MDT	Severe Thunderstorm Warning	CYS	45 min
Jul 4, 11:30 AM MDT	Mesoscale Discussion	SPC	90 min
Jul 4, 12:39 PM MDT	Tornado Watch	SPC	8 hr
Jul 4, 5:41 PM MDT	Tornado Warning	CYS	49 min
Jul 4, 6:08 PM MDT	Mesoscale Discussion	SPC	97 min
Jul 4, 6:24 PM MDT	Tornado Warning	CYS	51 min
Jul 4, 7:13 PM MDT	Severe Thunderstorm Warning	CYS	62 min
Jul 4, 7:39 PM MDT	Flash Flood Warning	CYS	4 hr
Jul 4, 11:28 PM MDT	Areal Flood Warning	CYS	10 hr
Jul 6, 2:42 AM MDT	Flash Flood Watch	CYS	23 hr
Jul 6, 1:06 PM MDT	Mesoscale Discussion	SPC	84 min
Jul 6, 1:50 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 6, 4:33 PM MDT	Severe Thunderstorm Warning	CYS	57 min
Jul 6, 4:38 PM MDT	Severe Thunderstorm Warning	CYS	43 min
Jul 6, 5:15 PM MDT	Tornado Warning	CYS	45 min
Jul 6, 5:22 PM MDT	Mesoscale Discussion	SPC	53 min
Jul 6, 5:56 PM MDT	Tornado Warning	CYS	49 min
Jul 6, 6:19 PM MDT	Tornado Warning	CYS	21 min
Jul 6, 6:37 PM MDT	Severe Thunderstorm Warning	CYS	53 min
Jul 6, 7:05 PM MDT	Flash Flood Warning	CYS	4 hr
Jul 6, 7:32 PM MDT	Severe Thunderstorm Warning	CYS	43 min
Jul 6, 8:12 PM MDT	Severe Thunderstorm Warning	CYS	51 min
Jul 6, 8:20 PM MDT	Mesoscale Discussion	SPC	25 min
Jul 6, 10:37 PM MDT	Areal Flood Warning	CYS	23 hr
Jul 7, 8:28 PM MDT	Areal Flood Warning	CYS	12 hr
Jul 10, 12:34 PM MDT	Mesoscale Discussion	SPC	116 min
Jul 11, 12:47 PM MDT	Mesoscale Discussion	SPC	28 min
Jul 11, 1:33 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 18, 2:00 PM MDT	Mesoscale Discussion	SPC	2 hr
Jul 18, 7:08 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 21, 6:22 PM MDT	Mesoscale Discussion	SPC	83 min
Jul 22, 3:24 PM MDT	Severe Thunderstorm Warning	CYS	40 min
Jul 29, 9:00 AM MDT	Flash Flood Watch	CYS	11 hr
Aug 9, 2:48 PM MDT	Mesoscale Discussion	SPC	87 min
Aug 9, 4:53 PM MDT	Mesoscale Discussion	SPC	97 min
Aug 9, 5:26 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 9, 7:41 PM MDT	Severe Thunderstorm Warning	CYS	33 min
Aug 9, 7:53 PM MDT	Areal Flood Advisory	CYS	3 hr
Aug 9, 8:12 PM MDT	Severe Thunderstorm Warning	CYS	33 min
Aug 9, 8:46 PM MDT	Mesoscale Discussion	SPC	89 min
Aug 16, 1:08 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 16, 2:34 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 16, 5:44 PM MDT	Mesoscale Discussion	SPC	61 min
Sep 5, 9:45 PM MDT	Wind Advisory	CYS	17 hr
Sep 9, 5:33 PM MDT	Mesoscale Discussion	SPC	57 min
Sep 14, 4:43 PM MDT	Mesoscale Discussion	SPC	92 min
Sep 20, 2:49 PM MDT	Mesoscale Discussion	SPC	86 min
Oct 12, 10:07 AM MDT	Freeze Watch	CYS	4 hr
Oct 12, 1:57 PM MDT	Freeze Warning	CYS	19 hr
Oct 13, 4:07 AM MDT	Frost Advisory	CYS	5 hr
Oct 25, 4:59 AM MDT	Wind Advisory	CYS	13 hr
Oct 25, 3:01 PM MDT	High Wind Watch	CYS	13 hr
Oct 26, 4:09 AM MDT	Wind Advisory	CYS	14 hr
Oct 27, 3:42 AM MDT	High Wind Warning	CYS	14 hr
Nov 10, 2:52 PM MST	Winter Weather Advisory	CYS	24 hr
Nov 11, 9:53 AM MST	Winter Storm Warning	CYS	5 hr
Nov 12, 2:24 AM MST	Dense Fog Advisory	CYS	6 hr
Nov 13, 2:49 AM MST	Winter Weather Advisory	CYS	17 hr
Nov 20, 5:57 PM MST	Dense Fog Advisory	CYS	19 hr
Nov 21, 3:32 PM MST	Dense Fog Advisory	CYS	6 hr
Nov 24, 9:01 AM MST	Wind Advisory	CYS	9 hr
Nov 24, 6:05 PM MST	Wind Chill Advisory	CYS	14 hr
Nov 28, 1:20 PM MST	Wind Advisory	CYS	32 hr
Dec 3, 12:52 PM MST	Wind Advisory	CYS	5 hr
Dec 10, 4:25 PM MST	Wind Advisory	CYS	25 hr
Dec 20, 10:23 AM MST	Wind Advisory	CYS	7 hr
Dec 25, 3:08 AM MST	Dense Fog Advisory	CYS	6 hr
Dec 25, 9:06 AM MST	Dense Fog Advisory	CYS	3 hr
Dec 28, 2:52 PM MST	Winter Storm Watch	CYS	22 hr
Dec 29, 12:37 PM MST	Blizzard Warning	CYS	59 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	19
Tornado Warning	8
Severe Thunderstorm Watch	9
Tornado Watch	11
Mesoscale Discussion	46
Flooding
Areal Flood Warning	5
Flash Flood Warning	3
Flash Flood Watch	2
Flood Watch	2
Areal Flood Advisory	2
Winter
Blizzard Warning	1
Winter Storm Warning	2
Winter Storm Watch	2
Winter Weather Advisory	9
Cold
Freeze Warning	1
Wind Chill Warning	2
Freeze Watch	1
Frost Advisory	1
Wind Chill Advisory	2
Wind and dust
High Wind Warning	3
High Wind Watch	2
Wind Advisory	20
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 2009 2011

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.