Weather alerts in Platte County, Wyoming, 2010

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

Platte County and its neighbors

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

Alerts: 159
Warnings: 69
Watches: 39
Advisories: 27
Busiest month: June42 alerts
Busiest day: July 4, 201010 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 9 tornado warnings covering Platte County in 2010 had a tornado report inside them; 5 of 6 tornado reports fell inside a warning, on average 15 minutes after it went out.

Platte County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	9	6	33%	6	83%	15 min
Severe thunderstorm warnings	28	12	57%	24	63%	18 min
Flash flood warnings	1	0	100%	0

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, 1:49 PM MST	Wind Chill Warning	CYS	21 hr
Jan 7, 1:49 PM MST	Wind Chill Advisory	CYS	21 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
Mar 4, 4:53 AM MST	Winter Storm Watch	CYS	10 hr
Mar 4, 2:38 PM MST	Winter Weather Advisory	CYS	38 hr
Mar 7, 4:01 AM MST	Dense Fog Advisory	CYS	5 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 22, 2:43 PM MDT	Winter Weather Advisory	CYS	33 hr
Mar 28, 12:07 PM MDT	High Wind Watch	CYS	17 hr
Mar 29, 4:48 AM MDT	High Wind Warning	CYS	39 hr
Mar 31, 2:48 PM MDT	Winter Weather Advisory	CYS	39 hr
Apr 2, 2:18 PM MDT	High Wind Watch	CYS	10 hr
Apr 3, 12:00 AM MDT	High Wind Warning	CYS	19 hr
Apr 5, 3:15 PM MDT	Winter Weather Advisory	CYS	39 hr
Apr 12, 4:00 PM MDT	High Wind Watch	CYS	12 hr
Apr 13, 3:34 AM MDT	High Wind Warning	CYS	16 hr
Apr 22, 2:49 PM MDT	Winter Storm Warning	CYS	39 hr
May 2, 3:52 PM MDT	High Wind Watch	CYS	18 hr
May 3, 10:21 AM MDT	High Wind Warning	CYS	33 hr
May 9, 11:35 PM MDT	Severe Thunderstorm Warning	CYS	50 min
May 10, 5:00 AM MDT	Winter Storm Watch	CYS	23 hr
May 11, 3:49 AM MDT	Winter Storm Warning	CYS	34 hr
May 11, 3:49 AM MDT	Winter Weather Advisory	CYS	34 hr
May 18, 3:37 PM MDT	Mesoscale Discussion	SPC	83 min
May 18, 4:55 PM MDT	Severe Thunderstorm Warning	CYS	50 min
May 18, 10:23 PM MDT	Areal Flood Warning	CYS	10 hr
May 21, 1:30 PM MDT	Mesoscale Discussion	SPC	60 min
May 21, 2:26 PM MDT	Tornado Watch	SPC	8 hr
May 21, 4:42 PM MDT	Severe Thunderstorm Warning	CYS	29 min
May 21, 5:06 PM MDT	Tornado Warning	CYS	54 min
May 21, 5:12 PM MDT	Mesoscale Discussion	SPC	2 hr
May 21, 5:55 PM MDT	Tornado Warning	CYS	65 min
May 21, 8:45 PM MDT	Severe Thunderstorm Warning	CYS	45 min
May 21, 9:16 PM MDT	Areal Flood Advisory	CYS	9 hr
May 21, 9:40 PM MDT	Severe Thunderstorm Warning	CYS	28 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 26, 1:26 PM MDT	Mesoscale Discussion	SPC	64 min
May 26, 1:49 PM MDT	Tornado Watch	SPC	7 hr
May 26, 4:26 PM MDT	Severe Thunderstorm Warning	CYS	20 min
May 26, 6:30 PM MDT	Mesoscale Discussion	SPC	90 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, 3:33 PM MDT	Severe Thunderstorm Warning	CYS	42 min
Jun 6, 4:45 PM MDT	Severe Thunderstorm Warning	CYS	45 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, 4:05 PM MDT	Severe Thunderstorm Warning	CYS	55 min
Jun 7, 4:57 PM MDT	Severe Thunderstorm Warning	CYS	63 min
Jun 7, 5:27 PM MDT	Severe Thunderstorm Warning	CYS	19 min
Jun 7, 6:23 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 7, 6:50 PM MDT	Severe Thunderstorm Warning	CYS	33 min
Jun 9, 8:26 PM MDT	Mesoscale Discussion	SPC	64 min
Jun 9, 8:45 PM MDT	Severe Thunderstorm Watch	SPC	11 hr
Jun 9, 10:09 PM MDT	Severe Thunderstorm Warning	CYS	51 min
Jun 9, 10:50 PM MDT	Severe Thunderstorm Warning	CYS	40 min
Jun 9, 10:52 PM MDT	Mesoscale Discussion	SPC	83 min
Jun 10, 12:41 AM MDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 2:53 PM MDT	Mesoscale Discussion	SPC	67 min
Jun 11, 3:01 AM MDT	Flood Watch	CYS	4 days
Jun 14, 8:05 PM MDT	Areal Flood Warning	CYS	12 hr
Jun 15, 8:05 AM MDT	Areal Flood Warning	CYS	12 hr
Jun 15, 2:49 PM MDT	High Wind Watch	CYS	12 hr
Jun 15, 10:13 PM MDT	Areal Flood Advisory	CYS	12 hr
Jun 16, 3:16 AM MDT	High Wind Warning	CYS	35 hr
Jun 16, 11:07 AM MDT	Areal Flood Advisory	CYS	24 hr
Jun 16, 1:38 PM MDT	Mesoscale Discussion	SPC	67 min
Jun 16, 4:01 PM MDT	Tornado Watch	SPC	7 hr
Jun 19, 4:12 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 20, 12:59 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 20, 1:30 PM MDT	Tornado Watch	SPC	7 hr
Jun 20, 1:59 PM MDT	Severe Thunderstorm Warning	CYS	35 min
Jun 20, 3:24 PM MDT	Severe Thunderstorm Warning	CYS	51 min
Jun 20, 3:56 PM MDT	Flash Flood Warning	CYS	5 hr
Jun 20, 4:02 PM MDT	Tornado Warning	CYS	28 min
Jun 20, 4:23 PM MDT	Mesoscale Discussion	SPC	67 min
Jun 20, 4:30 PM MDT	Tornado Warning	CYS	30 min
Jun 20, 4:58 PM MDT	Tornado Warning	CYS	32 min
Jun 21, 2:08 PM MDT	Tornado Watch	SPC	7 hr
Jun 21, 4:09 PM MDT	Severe Thunderstorm Warning	CYS	41 min
Jun 21, 6:09 PM MDT	Severe Thunderstorm Warning	CYS	51 min
Jun 21, 6:42 PM MDT	Mesoscale Discussion	SPC	93 min
Jun 26, 3:33 PM MDT	Severe Thunderstorm Warning	CYS	57 min
Jul 3, 12:02 PM MDT	Mesoscale Discussion	SPC	88 min
Jul 3, 9:10 PM MDT	Severe Thunderstorm Warning	CYS	31 min
Jul 3, 9:21 PM MDT	Severe Thunderstorm Warning	CYS	24 min
Jul 3, 9:44 PM MDT	Severe Thunderstorm Warning	CYS	12 min
Jul 4, 11:30 AM MDT	Mesoscale Discussion	SPC	90 min
Jul 4, 1:44 PM MDT	Tornado Warning	CYS	29 min
Jul 4, 2:08 PM MDT	Tornado Warning	CYS	52 min
Jul 4, 2:16 PM MDT	Tornado Warning	CYS	44 min
Jul 4, 2:51 PM MDT	Tornado Warning	CYS	39 min
Jul 4, 3:35 PM MDT	Severe Thunderstorm Warning	CYS	42 min
Jul 4, 5:09 PM MDT	Severe Thunderstorm Warning	CYS	66 min
Jul 4, 6:08 PM MDT	Mesoscale Discussion	SPC	97 min
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, 5:22 PM MDT	Mesoscale Discussion	SPC	53 min
Jul 21, 2:49 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 28, 5:24 PM MDT	Severe Thunderstorm Warning	CYS	49 min
Jul 29, 9:00 AM MDT	Flash Flood Watch	CYS	11 hr
Aug 1, 10:17 AM MDT	Flash Flood Watch	CYS	10 hr
Aug 3, 1:11 PM MDT	Severe Thunderstorm Warning	CYS	30 min
Aug 3, 5:10 PM MDT	Severe Thunderstorm Warning	CYS	19 min
Aug 4, 2:23 PM MDT	Mesoscale Discussion	SPC	67 min
Aug 16, 2:34 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 16, 4:22 PM MDT	Severe Thunderstorm Warning	CYS	53 min
Aug 16, 5:44 PM MDT	Mesoscale Discussion	SPC	61 min
Sep 6, 3:02 PM MDT	Frost Advisory	CYS	17 hr
Oct 12, 10:07 AM MDT	Freeze Watch	CYS	4 hr
Oct 22, 3:53 AM MDT	Winter Storm Watch	CYS	49 hr
Oct 23, 1:52 PM MDT	High Wind Watch	CYS	15 hr
Oct 24, 4:55 AM MDT	High Wind Watch	CYS	8 hr
Oct 24, 4:55 AM MDT	High Wind Warning	CYS	37 hr
Oct 25, 3:01 PM MDT	High Wind Watch	CYS	13 hr
Nov 8, 2:41 PM MST	Winter Weather Advisory	CYS	30 hr
Nov 13, 2:49 AM MST	Winter Weather Advisory	CYS	17 hr
Nov 14, 3:05 PM MST	High Wind Watch	CYS	23 hr
Nov 15, 1:37 PM MST	High Wind Warning	CYS	28 hr
Nov 17, 3:38 AM MST	High Wind Watch	CYS	11 hr
Nov 17, 2:10 PM MST	High Wind Warning	CYS	25 hr
Nov 21, 3:32 PM MST	Dense Fog Advisory	CYS	6 hr
Nov 21, 5:23 PM MST	Winter Weather Advisory	CYS	6 hr
Nov 22, 1:45 PM MST	Winter Storm Watch	CYS	24 hr
Nov 23, 2:10 PM MST	Winter Weather Advisory	CYS	15 hr
Nov 24, 3:06 PM MST	Wind Chill Warning	CYS	17 hr
Nov 24, 3:49 PM MST	High Wind Watch	CYS	13 hr
Nov 24, 6:05 PM MST	Wind Chill Advisory	CYS	14 hr
Nov 24, 9:39 PM MST	High Wind Warning	CYS	30 hr
Nov 27, 2:23 AM MST	Winter Weather Advisory	CYS	64 hr
Nov 30, 3:54 AM MST	High Wind Warning	CYS	37 hr
Dec 2, 5:22 AM MST	High Wind Watch	CYS	6 hr
Dec 2, 11:15 AM MST	High Wind Warning	CYS	27 hr
Dec 4, 5:25 AM MST	Dense Fog Advisory	CYS	7 hr
Dec 6, 2:02 AM MST	Dense Fog Advisory	CYS	11 hr
Dec 7, 2:51 AM MST	High Wind Watch	CYS	22 hr
Dec 8, 12:29 AM MST	High Wind Warning	CYS	31 hr
Dec 9, 9:14 PM MST	High Wind Warning	CYS	23 hr
Dec 12, 3:57 AM MST	High Wind Watch	CYS	9 hr
Dec 12, 12:27 PM MST	High Wind Warning	CYS	23 hr
Dec 13, 11:18 AM MST	High Wind Watch	CYS	9 hr
Dec 13, 8:31 PM MST	High Wind Warning	CYS	29 hr
Dec 14, 2:14 PM MST	High Wind Watch	CYS	7 hr
Dec 14, 2:31 PM MST	Winter Weather Advisory	CYS	27 hr
Dec 19, 9:22 AM MST	Winter Weather Advisory	CYS	25 hr
Dec 20, 12:13 PM MST	Winter Storm Warning	CYS	39 hr
Dec 20, 12:13 PM MST	Winter Weather Advisory	CYS	32 hr
Dec 27, 2:50 AM MST	High Wind Warning	CYS	8 hr
Dec 27, 2:21 PM MST	High Wind Watch	CYS	21 hr
Dec 28, 11:15 AM MST	High Wind Warning	CYS	27 hr
Dec 28, 2:52 PM MST	Winter Storm Watch	CYS	22 hr
Dec 29, 4:12 AM MST	Winter Storm Warning	CYS	57 hr
Dec 29, 12:37 PM MST	Blizzard Warning	CYS	59 hr
Dec 31, 1:30 PM MST	Wind Chill Warning	CYS	23 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	28
Tornado Warning	9
Severe Thunderstorm Watch	5
Tornado Watch	6
Mesoscale Discussion	24
Flooding
Areal Flood Warning	3
Flash Flood Warning	1
Flash Flood Watch	2
Flood Watch	1
Areal Flood Advisory	3
Winter
Blizzard Warning	1
Winter Storm Warning	5
Winter Storm Watch	6
Winter Weather Advisory	17
Cold
Wind Chill Warning	4
Freeze Watch	1
Frost Advisory	1
Wind Chill Advisory	2
Wind and dust
High Wind Warning	18
High Wind Watch	18
Fog and smoke
Dense Fog Advisory	4

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.