Weather alerts in Adams County, Colorado, 2010

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

Adams County and its neighbors

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

Alerts: 160
Warnings: 75
Watches: 20
Advisories: 24
Busiest month: June50 alerts
Busiest day: June 11, 201020 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 15 tornado warnings covering Adams County in 2010 had a tornado report inside them; 5 of 7 tornado reports fell inside a warning, on average 12 minutes after it went out.

Adams County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	15	4	73%	7	71%	12 min
Severe thunderstorm warnings	38	16	58%	34	82%	25 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 Denver/Boulder, CO: tornado warnings	80	21	74%	36	69%	14 min
NWS Denver/Boulder, CO: severe thunderstorm warnings	153	68	56%	268	54%	23 min
NWS Denver/Boulder, CO: flash flood warnings	22	3	86%	6	100%	50 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, 3:33 PM MST	Winter Weather Advisory	BOU	35 hr
Jan 7, 2:20 AM MST	Wind Chill Advisory	BOU	9 hr
Feb 18, 1:56 PM MST	Winter Weather Advisory	BOU	12 hr
Mar 14, 5:47 AM MDT	Winter Weather Advisory	BOU	20 hr
Mar 17, 2:56 PM MDT	Winter Storm Watch	BOU	22 hr
Mar 18, 6:19 AM MDT	Winter Storm Warning	BOU	42 hr
Mar 18, 12:55 PM MDT	Winter Weather Advisory	BOU	35 hr
Mar 22, 2:58 PM MDT	Winter Storm Warning	BOU	44 hr
Mar 22, 2:58 PM MDT	Winter Weather Advisory	BOU	44 hr
Mar 23, 6:21 PM MDT	Mesoscale Discussion	SPC	6 hr
Mar 25, 4:23 AM MDT	Winter Storm Watch	BOU	25 hr
Mar 26, 5:08 AM MDT	Winter Weather Advisory	BOU	14 hr
Apr 3, 6:37 AM MDT	Red Flag Warning	BOU	13 hr
Apr 4, 3:01 AM MDT	Fire Weather Watch	BOU	27 hr
Apr 5, 5:48 AM MDT	Red Flag Warning	BOU	14 hr
Apr 11, 2:47 PM MDT	Red Flag Warning	BOU	29 hr
Apr 19, 6:33 PM MDT	Special Weather Statement	BOU	27 min
Apr 21, 4:42 PM MDT	Severe Thunderstorm Warning	BOU	48 min
Apr 21, 5:52 PM MDT	Special Weather Statement	BOU	23 min
Apr 21, 5:58 PM MDT	Severe Thunderstorm Warning	BOU	47 min
Apr 22, 12:30 PM MDT	Tornado Watch	SPC	8 hr
Apr 22, 2:10 PM MDT	Severe Thunderstorm Warning	BOU	52 min
Apr 22, 2:21 PM MDT	Mesoscale Discussion	SPC	54 min
Apr 22, 2:30 PM MDT	Severe Thunderstorm Warning	BOU	60 min
Apr 22, 2:43 PM MDT	Tornado Warning	BOU	10 min
Apr 22, 2:57 PM MDT	Tornado Warning	BOU	48 min
Apr 22, 3:34 PM MDT	Tornado Warning	BOU	41 min
Apr 22, 4:17 PM MDT	Areal Flood Advisory	BOU	3 hr
Apr 23, 4:34 PM MDT	River Flood Warning	BOU	3 hr
Apr 24, 4:01 PM MDT	Frost Advisory	BOU	16 hr
May 11, 7:22 PM MDT	Special Weather Statement	BOU	53 min
May 12, 2:59 PM MDT	Freeze Warning	BOU	7 hr
May 15, 12:37 PM MDT	Mesoscale Discussion	SPC	83 min
May 15, 1:56 PM MDT	Tornado Warning	BOU	18 min
May 18, 11:42 AM MDT	Mesoscale Discussion	SPC	2 hr
May 18, 12:41 PM MDT	Tornado Watch	SPC	10 hr
May 18, 4:03 PM MDT	Severe Thunderstorm Warning	BOU	42 min
May 18, 6:50 PM MDT	Mesoscale Discussion	SPC	55 min
May 18, 8:19 PM MDT	Tornado Warning	BOU	21 min
May 21, 1:30 PM MDT	Mesoscale Discussion	SPC	60 min
May 24, 9:58 AM MDT	High Wind Warning	BOU	7 hr
May 26, 1:16 PM MDT	Severe Thunderstorm Warning	BOU	44 min
May 26, 1:26 PM MDT	Mesoscale Discussion	SPC	64 min
May 26, 1:31 PM MDT	Tornado Warning	BOU	44 min
May 26, 1:49 PM MDT	Tornado Watch	SPC	7 hr
May 26, 2:06 PM MDT	Tornado Warning	BOU	39 min
May 26, 2:57 PM MDT	Severe Thunderstorm Warning	BOU	48 min
May 26, 3:11 PM MDT	Tornado Warning	BOU	49 min
May 26, 6:30 PM MDT	Mesoscale Discussion	SPC	90 min
May 26, 7:10 PM MDT	Severe Thunderstorm Warning	BOU	50 min
May 26, 7:45 PM MDT	Areal Flood Advisory	BOU	90 min
May 26, 8:20 PM MDT	Severe Thunderstorm Warning	BOU	40 min
May 26, 8:30 PM MDT	Severe Thunderstorm Warning	BOU	45 min
May 29, 2:58 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
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, 6:26 PM MDT	Severe Thunderstorm Warning	BOU	49 min
Jun 6, 7:15 PM MDT	Tornado Warning	BOU	45 min
Jun 6, 7:16 PM MDT	Severe Thunderstorm Warning	BOU	30 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, 4:17 PM MDT	Mesoscale Discussion	SPC	88 min
Jun 7, 6:23 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 9, 1:55 PM MDT	Mesoscale Discussion	SPC	65 min
Jun 9, 2:39 PM MDT	Tornado Watch	SPC	6 hr
Jun 10, 4:38 PM MDT	Severe Thunderstorm Warning	BOU	67 min
Jun 10, 4:44 PM MDT	Tornado Watch	SPC	6 hr
Jun 10, 5:16 PM MDT	Severe Thunderstorm Warning	BOU	59 min
Jun 10, 5:40 PM MDT	Tornado Warning	BOU	50 min
Jun 10, 6:11 PM MDT	Severe Thunderstorm Warning	BOU	49 min
Jun 10, 6:29 PM MDT	Severe Thunderstorm Warning	BOU	61 min
Jun 10, 6:37 PM MDT	Tornado Warning	BOU	38 min
Jun 10, 6:41 PM MDT	Severe Thunderstorm Warning	BOU	64 min
Jun 10, 6:51 PM MDT	Severe Thunderstorm Warning	BOU	54 min
Jun 10, 7:21 PM MDT	Areal Flood Advisory	BOU	84 min
Jun 10, 7:45 PM MDT	Severe Thunderstorm Warning	BOU	60 min
Jun 10, 8:05 PM MDT	Severe Thunderstorm Warning	BOU	55 min
Jun 10, 8:17 PM MDT	Mesoscale Discussion	SPC	58 min
Jun 10, 8:54 PM MDT	Severe Thunderstorm Warning	BOU	66 min
Jun 11, 1:09 PM MDT	Mesoscale Discussion	SPC	96 min
Jun 11, 2:13 PM MDT	Tornado Watch	SPC	7 hr
Jun 11, 3:44 PM MDT	Severe Thunderstorm Warning	BOU	31 min
Jun 11, 3:51 PM MDT	Tornado Warning	BOU	39 min
Jun 11, 3:58 PM MDT	Areal Flood Advisory	BOU	67 min
Jun 11, 4:22 PM MDT	Tornado Warning	BOU	38 min
Jun 11, 4:59 PM MDT	Tornado Warning	BOU	46 min
Jun 11, 5:35 PM MDT	Mesoscale Discussion	SPC	55 min
Jun 11, 5:37 PM MDT	Severe Thunderstorm Warning	BOU	53 min
Jun 11, 5:49 PM MDT	Areal Flood Advisory	BOU	86 min
Jun 11, 6:08 PM MDT	Tornado Warning	BOU	52 min
Jun 11, 6:59 PM MDT	Severe Thunderstorm Warning	BOU	38 min
Jun 11, 8:13 PM MDT	Mesoscale Discussion	SPC	62 min
Jun 16, 1:38 PM MDT	Mesoscale Discussion	SPC	67 min
Jun 18, 8:45 PM MDT	Severe Thunderstorm Warning	BOU	45 min
Jun 18, 9:15 PM MDT	Severe Thunderstorm Warning	BOU	31 min
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, 4:23 PM MDT	Mesoscale Discussion	SPC	67 min
Jun 21, 2:31 PM MDT	Mesoscale Discussion	SPC	89 min
Jun 21, 2:53 PM MDT	Severe Thunderstorm Warning	BOU	52 min
Jun 21, 3:36 PM MDT	Severe Thunderstorm Warning	BOU	39 min
Jun 21, 4:17 PM MDT	Severe Thunderstorm Warning	BOU	43 min
Jun 27, 8:40 PM MDT	Areal Flood Advisory	BOU	80 min
Jul 2, 12:19 PM MDT	Mesoscale Discussion	SPC	56 min
Jul 2, 1:51 PM MDT	Severe Thunderstorm Warning	BOU	39 min
Jul 4, 12:39 PM MDT	Tornado Watch	SPC	8 hr
Jul 4, 3:28 PM MDT	Severe Thunderstorm Warning	BOU	47 min
Jul 4, 4:00 PM MDT	Severe Thunderstorm Warning	BOU	19 min
Jul 4, 4:38 PM MDT	Areal Flood Advisory	BOU	82 min
Jul 4, 5:22 PM MDT	Severe Thunderstorm Warning	BOU	38 min
Jul 4, 6:08 PM MDT	Mesoscale Discussion	SPC	97 min
Jul 6, 4:33 PM MDT	Severe Thunderstorm Warning	BOU	42 min
Jul 6, 6:41 PM MDT	Severe Thunderstorm Warning	BOU	49 min
Jul 6, 7:21 PM MDT	Mesoscale Discussion	SPC	54 min
Jul 6, 7:27 PM MDT	Flash Flood Warning	BOU	2 hr
Jul 6, 8:20 PM MDT	Mesoscale Discussion	SPC	25 min
Jul 8, 1:31 PM MDT	Mesoscale Discussion	SPC	59 min
Jul 9, 2:22 PM MDT	Mesoscale Discussion	SPC	113 min
Jul 11, 4:28 PM MDT	Special Weather Statement	BOU	32 min
Jul 21, 3:42 PM MDT	Mesoscale Discussion	SPC	63 min
Jul 21, 4:04 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 27, 5:33 PM MDT	Special Weather Statement	BOU	42 min
Aug 4, 5:01 PM MDT	Special Weather Statement	BOU	59 min
Aug 4, 5:32 PM MDT	Special Weather Statement	BOU	43 min
Aug 6, 4:56 PM MDT	Areal Flood Advisory	BOU	63 min
Aug 6, 6:01 PM MDT	Special Weather Statement	BOU	29 min
Aug 9, 4:53 PM MDT	Mesoscale Discussion	SPC	97 min
Aug 9, 6:19 PM MDT	Severe Thunderstorm Warning	BOU	56 min
Aug 15, 8:05 PM MDT	Severe Thunderstorm Warning	BOU	40 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
Aug 16, 6:19 PM MDT	Areal Flood Advisory	BOU	56 min
Aug 19, 8:14 PM MDT	Severe Thunderstorm Warning	BOU	23 min
Sep 4, 3:46 AM MDT	Fire Weather Watch	BOU	11 hr
Sep 4, 3:08 PM MDT	Red Flag Warning	BOU	30 hr
Sep 7, 4:08 AM MDT	Red Flag Warning	BOU	16 hr
Sep 8, 2:57 PM MDT	Fire Weather Watch	BOU	24 hr
Sep 8, 2:57 PM MDT	Red Flag Warning	BOU	51 hr
Sep 19, 4:24 AM MDT	Fire Weather Watch	BOU	10 hr
Sep 19, 2:03 PM MDT	Red Flag Warning	BOU	31 hr
Sep 27, 1:37 AM MDT	Red Flag Warning	BOU	14 hr
Sep 29, 3:50 AM MDT	Red Flag Warning	BOU	11 hr
Oct 12, 4:07 AM MDT	Frost Advisory	BOU	29 hr
Oct 18, 3:56 PM MDT	Frost Advisory	BOU	17 hr
Oct 25, 4:26 AM MDT	Freeze Warning	BOU	27 hr
Oct 26, 1:29 PM MDT	Red Flag Warning	BOU	5 hr
Oct 26, 3:07 PM MDT	Fire Weather Watch	BOU	13 hr
Oct 26, 7:20 PM MDT	Freeze Warning	BOU	14 hr
Oct 27, 4:09 AM MDT	Red Flag Warning	BOU	15 hr
Oct 27, 3:14 PM MDT	Freeze Warning	BOU	18 hr
Nov 17, 12:36 AM MST	Blizzard Warning	BOU	4 hr
Nov 20, 10:49 PM MST	Dense Fog Advisory	BOU	11 hr
Nov 21, 6:32 PM MST	Dense Fog Advisory	BOU	10 hr
Dec 14, 3:16 PM MST	Winter Weather Advisory	BOU	32 hr
Dec 29, 3:29 AM MST	Winter Storm Watch	BOU	13 hr
Dec 29, 3:27 PM MST	Winter Storm Warning	BOU	44 hr
Dec 29, 3:27 PM MST	Winter Weather Advisory	BOU	47 hr
Dec 31, 2:45 PM MST	Wind Chill Advisory	BOU	19 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	15
Severe Thunderstorm Watch	4
Tornado Watch	8
Mesoscale Discussion	33
Special Weather Statement	8
Flooding
Flash Flood Warning	1
River Flood Warning	1
Areal Flood Advisory	9
Winter
Blizzard Warning	1
Winter Storm Warning	3
Winter Storm Watch	3
Winter Weather Advisory	8
Cold
Freeze Warning	4
Frost Advisory	3
Wind Chill Advisory	2
Wind and dust
High Wind Warning	1
Fire
Red Flag Warning	11
Fire Weather Watch	5
Fog and smoke
Dense Fog Advisory	2

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.