Alert archive / California / Placer County

Weather alerts in Placer County, California, 2014

119 weather alerts in 2014, 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 2014. Tap one for its archive.

Alerts: 119
Warnings: 26
Watches: 20
Advisories: 69
Busiest month: December24 alerts
Busiest day: March 27, 20144 alerts

Over time

By month

Warning verification

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

1 of 3 tornado warnings covering Placer County in 2014 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 3 minutes after it went out.

Placer County, 2014

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	3	1	67%	1	100%	3 min
Severe thunderstorm warnings	4	0	100%	0
Flash flood warnings	7	2	71%	8	75%	67 min

Each office's whole area, 2014

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Reno, NV: tornado warnings	1	0	100%	0
NWS Reno, NV: severe thunderstorm warnings	35	8	77%	31	35%	15 min
NWS Reno, NV: flash flood warnings	25	9	64%	37	54%	77 min
NWS Sacramento, CA: tornado warnings	13	2	85%	13	46%	23 min
NWS Sacramento, CA: severe thunderstorm warnings	13	3	77%	9	33%	21 min
NWS Sacramento, CA: flash flood warnings	13	6	54%	18	78%	97 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, Pacific Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 9, 11:53 AM PST	High Wind Watch	REV	23 hr
Jan 10, 10:43 AM PST	Wind Advisory	REV	27 hr
Jan 11, 1:52 PM PST	Lake Wind Advisory	REV	13 hr
Jan 28, 2:51 AM PST	Winter Storm Watch	REV	25 hr
Jan 28, 2:27 PM PST	Lake Wind Advisory	REV	32 hr
Jan 29, 3:30 AM PST	Winter Storm Warning	REV	37 hr
Jan 30, 2:47 PM PST	Winter Weather Advisory	REV	13 hr
Feb 5, 3:18 PM PST	Winter Weather Advisory	REV	20 hr
Feb 6, 2:43 PM PST	Winter Storm Watch	REV	45 hr
Feb 6, 2:43 PM PST	Winter Storm Warning	REV	45 hr
Feb 6, 2:44 PM PST	Lake Wind Advisory	REV	25 hr
Feb 7, 2:27 AM PST	Wind Advisory	REV	34 hr
Feb 7, 3:05 PM PST	Lake Wind Advisory	REV	35 hr
Feb 8, 9:19 AM PST	Flood Watch	REV	26 hr
Feb 8, 12:03 PM PST	Winter Storm Warning	REV	40 hr
Feb 8, 8:09 PM PST	Flash Flood Warning	STO	6 hr
Feb 9, 12:05 PM PST	Areal Flood Advisory	STO	6 hr
Feb 11, 2:45 AM PST	Freezing Fog Advisory	REV	7 hr
Feb 11, 3:05 PM PST	Lake Wind Advisory	REV	24 hr
Feb 13, 3:36 AM PST	High Wind Watch	REV	30 hr
Feb 13, 2:30 PM PST	Lake Wind Advisory	REV	26 hr
Feb 14, 9:10 AM PST	Wind Advisory	REV	35 hr
Feb 16, 4:41 AM PST	Lake Wind Advisory	REV	6 hr
Feb 18, 2:26 AM PST	Lake Wind Advisory	REV	36 hr
Feb 25, 12:41 PM PST	Winter Weather Advisory	REV	45 hr
Feb 27, 1:48 PM PST	Winter Weather Advisory	REV	38 hr
Feb 28, 1:20 PM PST	Areal Flood Advisory	STO	6 hr
Mar 5, 3:36 AM PST	Lake Wind Advisory	REV	38 hr
Mar 9, 3:26 AM PDT	Lake Wind Advisory	REV	41 hr
Mar 10, 2:29 PM PDT	Lake Wind Advisory	REV	51 hr
Mar 16, 2:40 AM PDT	Lake Wind Advisory	REV	34 hr
Mar 24, 2:56 PM PDT	Lake Wind Advisory	REV	38 hr
Mar 25, 2:22 AM PDT	Winter Weather Advisory	REV	48 hr
Mar 25, 3:04 PM PDT	Lake Wind Advisory	REV	28 hr
Mar 26, 5:40 PM PDT	Tornado Warning	STO	50 min
Mar 26, 6:12 PM PDT	Tornado Warning	STO	48 min
Mar 26, 7:00 PM PDT	Tornado Warning	STO	45 min
Mar 27, 1:55 PM PDT	Winter Storm Watch	REV	24 hr
Mar 28, 2:09 PM PDT	Winter Storm Warning	REV	37 hr
Mar 30, 2:20 PM PDT	Winter Weather Advisory	REV	36 hr
Apr 20, 2:29 PM PDT	Lake Wind Advisory	REV	52 hr
Apr 24, 3:47 AM PDT	Lake Wind Advisory	REV	19 hr
Apr 24, 3:47 AM PDT	Winter Weather Advisory	REV	47 hr
Apr 26, 2:45 PM PDT	Lake Wind Advisory	REV	31 hr
May 1, 1:49 PM PDT	Lake Wind Advisory	REV	62 hr
May 3, 8:04 PM PDT	Lake Wind Advisory	REV	51 hr
May 9, 1:12 PM PDT	Lake Wind Advisory	REV	46 hr
May 16, 4:09 AM PDT	Lake Wind Advisory	REV	41 hr
May 17, 9:02 AM PDT	Lake Wind Advisory	REV	36 hr
May 20, 6:33 AM PDT	Winter Weather Advisory	REV	7 hr
May 26, 3:32 PM PDT	Lake Wind Advisory	REV	31 hr
Jun 9, 5:57 AM PDT	Fire Weather Watch	REV	4 days
Jun 10, 8:42 AM PDT	Red Flag Warning	REV	3 days
Jun 11, 9:23 AM PDT	Fire Weather Watch	REV	62 hr
Jun 11, 9:29 AM PDT	Lake Wind Advisory	REV	59 hr
Jun 15, 2:09 PM PDT	Lake Wind Advisory	REV	40 hr
Jun 23, 8:15 AM PDT	Fire Weather Watch	REV	26 hr
Jun 24, 1:34 PM PDT	Lake Wind Advisory	REV	56 hr
Jun 30, 9:16 AM PDT	Red Flag Warning	REV	36 hr
Jul 6, 7:49 PM PDT	Fire Weather Watch	REV	31 hr
Jul 14, 12:52 PM PDT	Flash Flood Watch	REV	47 hr
Jul 16, 2:59 AM PDT	Flash Flood Watch	REV	4 days
Jul 17, 3:17 PM PDT	Severe Thunderstorm Warning	REV	43 min
Jul 20, 3:23 PM PDT	Severe Thunderstorm Warning	REV	37 min
Jul 30, 4:13 PM PDT	Areal Flood Warning	REV	3 hr
Jul 30, 5:00 PM PDT	Special Weather Statement	STO	45 min
Aug 10, 3:49 PM PDT	Severe Thunderstorm Warning	REV	56 min
Aug 10, 4:05 PM PDT	Special Weather Statement	STO	40 min
Aug 11, 9:16 AM PDT	Fire Weather Watch	REV	23 hr
Aug 11, 11:37 AM PDT	Special Weather Statement	STO	53 min
Aug 11, 2:42 PM PDT	Mesoscale Discussion	SPC	2 hr
Aug 11, 4:44 PM PDT	Severe Thunderstorm Warning	STO	61 min
Aug 12, 11:38 AM PDT	Lake Wind Advisory	REV	32 hr
Aug 21, 1:38 PM PDT	Lake Wind Advisory	REV	33 hr
Aug 29, 10:35 AM PDT	Lake Wind Advisory	REV	35 hr
Sep 16, 1:17 PM PDT	Lake Wind Advisory	REV	31 hr
Sep 21, 1:54 PM PDT	Dense Smoke Advisory	REV	13 hr
Sep 22, 3:19 AM PDT	Dense Smoke Advisory	REV	17 hr
Sep 22, 2:04 PM PDT	Dense Smoke Advisory	REV	57 hr
Sep 23, 11:02 AM PDT	Red Flag Warning	REV	36 hr
Sep 23, 11:17 AM PDT	Lake Wind Advisory	REV	57 hr
Sep 25, 12:25 PM PDT	Flash Flood Warning	STO	6 hr
Oct 12, 2:25 PM PDT	Wind Advisory	REV	69 hr
Oct 15, 10:53 AM PDT	Lake Wind Advisory	REV	4 hr
Oct 19, 11:38 AM PDT	Lake Wind Advisory	REV	35 hr
Oct 23, 2:37 PM PDT	Lake Wind Advisory	REV	56 hr
Oct 29, 1:06 PM PDT	Winter Storm Watch	REV	22 hr
Oct 30, 11:11 AM PDT	Winter Storm Warning	REV	48 hr
Oct 30, 2:26 PM PDT	Lake Wind Advisory	REV	26 hr
Nov 20, 3:32 PM PST	High Wind Watch	REV	20 hr
Nov 21, 11:27 AM PST	Wind Advisory	REV	32 hr
Nov 22, 2:51 PM PST	Lake Wind Advisory	REV	4 hr
Nov 27, 3:19 PM PST	Lake Wind Advisory	REV	31 hr
Nov 28, 2:19 PM PST	Winter Weather Advisory	REV	20 hr
Nov 29, 3:24 AM PST	Lake Wind Advisory	REV	13 hr
Dec 1, 3:26 AM PST	Winter Storm Watch	REV	10 hr
Dec 1, 1:21 PM PST	Winter Storm Warning	REV	61 hr
Dec 1, 3:06 PM PST	Flash Flood Watch	STO	55 hr
Dec 2, 9:50 AM PST	Areal Flood Advisory	STO	6 hr
Dec 3, 7:37 AM PST	Areal Flood Advisory	STO	12 hr
Dec 3, 4:17 PM PST	Flash Flood Warning	STO	3 hr
Dec 3, 4:56 PM PST	Flash Flood Warning	STO	5 hr
Dec 3, 7:20 PM PST	Areal Flood Advisory	STO	12 hr
Dec 3, 7:20 PM PST	Flash Flood Warning	STO	3 hr
Dec 8, 10:39 AM PST	Flood Watch	STO	3 days
Dec 8, 2:43 PM PST	Winter Storm Watch	REV	37 hr
Dec 8, 2:47 PM PST	High Wind Watch	REV	37 hr
Dec 9, 12:26 PM PST	High Wind Warning	REV	55 hr
Dec 10, 4:01 AM PST	Winter Storm Warning	REV	58 hr
Dec 11, 9:35 AM PST	Areal Flood Advisory	STO	12 hr
Dec 11, 9:39 AM PST	Flash Flood Warning	STO	12 hr
Dec 11, 9:56 AM PST	Areal Flood Advisory	STO	12 hr
Dec 11, 9:22 PM PST	Flash Flood Warning	STO	6 hr
Dec 11, 9:46 PM PST	Areal Flood Advisory	STO	12 hr
Dec 12, 10:07 AM PST	Areal Flood Advisory	STO	6 hr
Dec 23, 3:50 PM PST	Winter Weather Advisory	REV	28 hr
Dec 23, 3:54 PM PST	Lake Wind Advisory	REV	21 hr
Dec 29, 2:47 PM PST	Wind Advisory	REV	32 hr
Dec 30, 10:49 PM PST	Lake Wind Advisory	REV	13 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	4
Tornado Warning	3
Mesoscale Discussion	1
Special Weather Statement	3
Flooding
Areal Flood Warning	1
Flash Flood Warning	7
Flash Flood Watch	3
Flood Watch	2
Areal Flood Advisory	9
Winter
Winter Storm Warning	7
Winter Storm Watch	6
Winter Weather Advisory	10
Wind and dust
High Wind Warning	1
High Wind Watch	4
Lake Wind Advisory	40
Wind Advisory	6
Fire
Red Flag Warning	3
Fire Weather Watch	5
Fog and smoke
Dense Smoke Advisory	3
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 2013 2015

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.