Alert archive / California / Placer County

Weather alerts in Placer County, California, 2008

123 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Placer County and its neighbors

Each county as a circle sized by its count in 2008. Tap one for its archive.

Alerts: 123
Warnings: 20
Watches: 17
Advisories: 77
Busiest month: January28 alerts
Busiest day: January 28, 20084 alerts

Over time

By month

Warning verification

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

Placer County, 2008

	Warnings	With a report	False alarm ratio
Tornado warnings	0
Severe thunderstorm warnings	1	0	100%
Flash flood warnings	0

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Sacramento, CA: severe thunderstorm warnings	1	0	100%	1	0%
NWS Sacramento, CA: flash flood warnings	3	0	100%	1	0%

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, Pacific Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 1, 3:01 PM PST	Winter Storm Watch	REV	25 hr
Jan 2, 2:56 PM PST	High Wind Warning	REV	51 hr
Jan 2, 2:56 PM PST	Lake Wind Advisory	REV	37 hr
Jan 2, 3:46 PM PST	Blizzard Warning	REV	60 hr
Jan 3, 9:16 PM PST	Winter Storm Warning	REV	63 hr
Jan 4, 3:31 AM PST	Mesoscale Discussion	SPC	3 hr
Jan 4, 10:37 AM PST	Mesoscale Discussion	SPC	4 hr
Jan 5, 11:37 AM PST	Mesoscale Discussion	SPC	5 hr
Jan 7, 3:18 PM PST	Snow Advisory	REV	7 hr
Jan 7, 3:18 PM PST	Winter Storm Warning	REV	31 hr
Jan 8, 9:37 AM PST	Mesoscale Discussion	SPC	6 hr
Jan 15, 3:41 PM PST	Lake Wind Advisory	REV	36 hr
Jan 19, 2:32 PM PST	Lake Wind Advisory	REV	27 hr
Jan 21, 4:34 AM PST	Snow Advisory	REV	15 hr
Jan 22, 7:40 PM PST	Snow Advisory	REV	8 hr
Jan 23, 10:54 AM PST	Snow Advisory	REV	23 hr
Jan 23, 3:49 PM PST	Winter Storm Watch	REV	25 hr
Jan 24, 4:30 PM PST	Snow Advisory	REV	17 hr
Jan 25, 9:14 AM PST	Snow Advisory	REV	23 hr
Jan 25, 3:29 PM PST	Winter Storm Watch	REV	24 hr
Jan 26, 3:15 PM PST	Winter Storm Warning	REV	45 hr
Jan 27, 4:09 PM PST	Mesoscale Discussion	SPC	6 hr
Jan 27, 10:38 PM PST	Mesoscale Discussion	SPC	6 hr
Jan 28, 8:43 AM PST	Lake Wind Advisory	REV	6 hr
Jan 28, 3:51 PM PST	Snow and Blowing Snow Advisory	REV	36 hr
Jan 29, 3:24 PM PST	Winter Storm Watch	REV	24 hr
Jan 30, 3:44 PM PST	Winter Storm Warning	REV	36 hr
Jan 31, 9:57 AM PST	Mesoscale Discussion	SPC	4 hr
Feb 1, 4:02 AM PST	Winter Storm Watch	REV	12 hr
Feb 1, 4:04 AM PST	Lake Wind Advisory	REV	7 hr
Feb 1, 4:28 PM PST	Winter Storm Warning	REV	48 hr
Feb 2, 8:40 PM PST	Mesoscale Discussion	SPC	6 hr
Feb 4, 8:52 PM PST	Lake Wind Advisory	REV	11 hr
Feb 7, 8:12 AM PST	Lake Wind Advisory	REV	8 hr
Feb 12, 2:16 PM PST	Lake Wind Advisory	REV	50 hr
Feb 14, 9:04 PM PST	Lake Wind Advisory	REV	7 hr
Feb 21, 3:45 AM PST	Snow Advisory	REV	24 hr
Feb 21, 3:16 PM PST	Winter Storm Watch	REV	25 hr
Feb 22, 3:58 PM PST	Winter Storm Warning	REV	54 hr
Feb 29, 3:08 PM PST	Wind Advisory	REV	21 hr
Feb 29, 9:48 PM PST	Lake Wind Advisory	REV	20 hr
Mar 2, 3:48 AM PST	Lake Wind Advisory	REV	14 hr
Mar 12, 2:35 PM PDT	Lake Wind Advisory	REV	55 hr
Mar 16, 2:51 AM PDT	Lake Wind Advisory	REV	25 hr
Mar 18, 3:28 PM PDT	Lake Wind Advisory	REV	32 hr
Mar 23, 2:54 PM PDT	High Wind Watch	REV	47 hr
Mar 24, 2:55 PM PDT	Lake Wind Advisory	REV	43 hr
Mar 25, 1:42 PM PDT	Wind Advisory	REV	32 hr
Mar 27, 3:42 AM PDT	High Wind Watch	REV	12 hr
Mar 27, 3:27 PM PDT	Wind Advisory	REV	29 hr
Apr 3, 2:58 PM PDT	Lake Wind Advisory	REV	30 hr
Apr 5, 3:01 PM PDT	Lake Wind Advisory	REV	29 hr
Apr 7, 3:21 PM PDT	Lake Wind Advisory	REV	26 hr
Apr 13, 3:04 AM PDT	High Wind Watch	REV	12 hr
Apr 13, 3:09 PM PDT	High Wind Warning	REV	37 hr
Apr 17, 2:50 PM PDT	Lake Wind Advisory	REV	30 hr
Apr 18, 3:38 PM PDT	Wind Advisory	REV	31 hr
Apr 19, 11:00 PM PDT	Lake Wind Advisory	REV	17 hr
Apr 22, 3:12 AM PDT	Lake Wind Advisory	REV	49 hr
Apr 22, 3:27 AM PDT	Snow Advisory	REV	20 hr
Apr 27, 2:18 PM PDT	Lake Wind Advisory	REV	43 hr
Apr 28, 3:51 PM PDT	Wind Advisory	REV	28 hr
May 4, 5:21 PM PDT	Severe Thunderstorm Warning	STO	39 min
May 5, 3:03 PM PDT	Lake Wind Advisory	REV	23 hr
May 10, 3:29 PM PDT	Lake Wind Advisory	REV	30 hr
May 13, 1:59 PM PDT	Lake Wind Advisory	REV	47 hr
May 19, 2:52 PM PDT	Lake Wind Advisory	REV	30 hr
May 21, 2:53 AM PDT	Lake Wind Advisory	REV	17 hr
Jun 2, 9:53 PM PDT	Lake Wind Advisory	REV	23 hr
Jun 3, 2:46 PM PDT	Lake Wind Advisory	REV	29 hr
Jun 6, 3:37 AM PDT	Lake Wind Advisory	REV	13 hr
Jun 20, 2:41 PM PDT	Lake Wind Advisory	REV	24 hr
Jun 22, 3:51 PM PDT	Lake Wind Advisory	REV	2 hr
Jun 26, 2:30 PM PDT	Fire Weather Watch	REV	63 hr
Jul 9, 3:45 PM PDT	Air Stagnation Advisory	REV	63 hr
Jul 26, 2:36 AM PDT	Lake Wind Advisory	REV	19 hr
Jul 26, 3:13 AM PDT	Red Flag Warning	REV	19 hr
Jul 26, 3:01 PM PDT	Fire Weather Watch	REV	13 hr
Aug 2, 6:13 AM PDT	Red Flag Warning	REV	14 hr
Aug 2, 6:46 AM PDT	Lake Wind Advisory	REV	13 hr
Aug 8, 2:22 AM PDT	Lake Wind Advisory	REV	18 hr
Aug 8, 6:20 AM PDT	Red Flag Warning	REV	16 hr
Aug 8, 3:16 PM PDT	Lake Wind Advisory	REV	29 hr
Aug 18, 9:43 AM PDT	Lake Wind Advisory	REV	9 hr
Aug 19, 3:40 AM PDT	Lake Wind Advisory	REV	9 hr
Aug 23, 3:45 PM PDT	Fire Weather Watch	REV	29 hr
Aug 24, 4:01 AM PDT	Red Flag Warning	REV	42 hr
Aug 24, 3:00 PM PDT	Lake Wind Advisory	REV	31 hr
Aug 28, 1:24 PM PDT	Fire Weather Watch	REV	17 hr
Aug 29, 6:14 AM PDT	Red Flag Warning	REV	62 hr
Aug 29, 3:26 PM PDT	Lake Wind Advisory	REV	36 hr
Aug 30, 2:42 PM PDT	Lake Wind Advisory	REV	29 hr
Sep 9, 2:50 AM PDT	Lake Wind Advisory	REV	18 hr
Sep 15, 11:02 AM PDT	Fire Weather Watch	REV	23 hr
Sep 16, 5:45 AM PDT	Red Flag Warning	REV	20 hr
Sep 19, 3:02 AM PDT	Lake Wind Advisory	REV	17 hr
Sep 24, 2:44 PM PDT	Lake Wind Advisory	REV	24 hr
Oct 1, 3:12 PM PDT	Lake Wind Advisory	REV	3 days
Oct 8, 3:16 PM PDT	Lake Wind Advisory	REV	28 hr
Oct 9, 3:42 PM PDT	Lake Effect Snow Advisory	REV	28 hr
Oct 11, 3:07 AM PDT	Lake Wind Advisory	REV	16 hr
Oct 12, 9:43 PM PDT	Lake Wind Advisory	REV	13 hr
Oct 29, 2:53 PM PDT	Lake Wind Advisory	REV	52 hr
Nov 1, 2:53 AM PDT	Lake Wind Advisory	REV	16 hr
Nov 1, 12:55 PM PDT	Areal Flood Advisory	STO	9 hr
Nov 1, 7:29 PM PDT	Lake Wind Advisory	REV	4 hr
Nov 2, 2:22 AM PST	Lake Wind Advisory	REV	11 hr
Nov 2, 3:41 PM PST	Winter Weather Advisory	REV	36 hr
Nov 4, 3:39 AM PST	Lake Wind Advisory	REV	8 hr
Nov 7, 3:13 PM PST	Lake Wind Advisory	REV	29 hr
Nov 19, 2:22 PM PST	Lake Wind Advisory	REV	29 hr
Nov 30, 3:19 PM PST	Lake Wind Advisory	REV	30 hr
Dec 2, 3:11 AM PST	Lake Wind Advisory	REV	8 hr
Dec 10, 2:21 PM PST	High Wind Watch	REV	32 hr
Dec 11, 2:51 PM PST	High Wind Warning	REV	46 hr
Dec 13, 7:11 AM PST	Lake Wind Advisory	REV	6 hr
Dec 14, 5:07 AM PST	Winter Storm Warning	REV	41 hr
Dec 15, 3:00 AM PST	Mesoscale Discussion	SPC	4 hr
Dec 17, 4:39 AM PST	Winter Storm Watch	REV	24 hr
Dec 18, 4:21 AM PST	Winter Storm Warning	REV	33 hr
Dec 21, 4:02 AM PST	Winter Weather Advisory	REV	27 hr
Dec 23, 4:40 AM PST	Winter Storm Watch	REV	11 hr
Dec 23, 4:01 PM PST	Winter Storm Warning	REV	48 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	1
Mesoscale Discussion	9
Flooding
Areal Flood Advisory	1
Winter
Blizzard Warning	1
Winter Storm Warning	9
Winter Storm Watch	8
Lake Effect Snow Advisory	1
Snow Advisory	8
Snow and Blowing Snow Advisory	1
Winter Weather Advisory	2
Wind and dust
High Wind Warning	3
High Wind Watch	4
Lake Wind Advisory	58
Wind Advisory	5
Fire
Red Flag Warning	6
Fire Weather Watch	5
Fog and smoke
Air Stagnation 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 2007 2009

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.