Alert archive / California / Nevada County

Weather alerts in Nevada County, California, 2013

88 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Nevada County and its neighbors

Each county as a circle sized by its count in 2013. Tap one for its archive.

Alerts: 88
Warnings: 12
Watches: 10
Advisories: 62
Busiest month: September15 alerts
Busiest day: May 5, 20134 alerts

Over time

By month

Warning verification

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

Nevada County, 2013

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	3	0	100%	0
Flash flood warnings	2	2	0%	1	100%	32 min

Each office's whole area, 2013

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Reno, NV: severe thunderstorm warnings	46	6	87%	31	29%	14 min
NWS Reno, NV: flash flood warnings	23	5	78%	19	42%	44 min
NWS Sacramento, CA: tornado warnings	2	2	0%	6	33%	11 min
NWS Sacramento, CA: severe thunderstorm warnings	16	2	88%	4	50%	2 min
NWS Sacramento, CA: flash flood warnings	3	0	100%	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 8, 2:11 PM PST	Lake Wind Advisory	REV	28 hr
Jan 9, 2:37 PM PST	Winter Weather Advisory	REV	15 hr
Jan 13, 8:28 AM PST	Lake Wind Advisory	REV	24 hr
Jan 22, 2:01 PM PST	Lake Wind Advisory	REV	29 hr
Jan 25, 3:47 AM PST	Freezing Fog Advisory	REV	6 hr
Jan 26, 2:11 PM PST	Lake Wind Advisory	REV	14 hr
Jan 28, 2:29 PM PST	Lake Wind Advisory	REV	25 hr
Feb 4, 2:16 PM PST	Lake Wind Advisory	REV	7 hr
Feb 4, 9:05 PM PST	Lake Wind Advisory	REV	23 hr
Feb 7, 3:48 AM PST	Lake Wind Advisory	REV	9 hr
Feb 10, 3:05 AM PST	Lake Wind Advisory	REV	31 hr
Feb 17, 2:10 PM PST	Lake Wind Advisory	REV	38 hr
Feb 18, 3:57 AM PST	Winter Weather Advisory	REV	48 hr
Feb 22, 2:45 PM PST	Lake Wind Advisory	REV	27 hr
Feb 23, 2:28 PM PST	Lake Wind Advisory	REV	20 hr
Mar 1, 2:20 PM PST	Lake Wind Advisory	REV	30 hr
Mar 4, 3:01 PM PST	Lake Wind Advisory	REV	49 hr
Mar 4, 3:01 PM PST	Winter Weather Advisory	REV	52 hr
Mar 16, 3:29 AM PDT	Lake Wind Advisory	REV	11 hr
Mar 19, 3:36 AM PDT	Lake Wind Advisory	REV	43 hr
Apr 3, 2:41 PM PDT	Lake Wind Advisory	REV	32 hr
Apr 6, 1:39 PM PDT	Wind Advisory	REV	49 hr
Apr 7, 10:50 PM PDT	Lake Wind Advisory	REV	60 hr
Apr 12, 2:51 PM PDT	Lake Wind Advisory	REV	32 hr
Apr 13, 2:43 PM PDT	Lake Wind Advisory	REV	38 hr
Apr 16, 7:12 AM PDT	Lake Wind Advisory	REV	7 hr
Apr 29, 2:38 PM PDT	Lake Wind Advisory	REV	50 hr
May 5, 1:05 PM PDT	Special Weather Statement	STO	40 min
May 5, 1:57 PM PDT	Severe Thunderstorm Warning	STO	33 min
May 5, 2:25 PM PDT	Special Weather Statement	STO	50 min
May 5, 2:47 PM PDT	Mesoscale Discussion	SPC	118 min
May 12, 12:20 PM PDT	Lake Wind Advisory	REV	32 hr
May 20, 3:05 PM PDT	Lake Wind Advisory	REV	36 hr
May 26, 3:26 AM PDT	Lake Wind Advisory	REV	18 hr
Jun 8, 9:20 AM PDT	Fire Weather Watch	REV	20 hr
Jun 9, 5:03 AM PDT	Red Flag Warning	REV	22 hr
Jun 11, 2:17 AM PDT	Lake Wind Advisory	REV	18 hr
Jun 11, 10:39 AM PDT	Red Flag Warning	REV	36 hr
Jun 11, 3:20 PM PDT	Lake Wind Advisory	REV	29 hr
Jun 16, 3:35 AM PDT	Fire Weather Watch	REV	24 hr
Jun 17, 3:37 AM PDT	Red Flag Warning	REV	43 hr
Jun 17, 2:13 PM PDT	Lake Wind Advisory	REV	33 hr
Jun 23, 2:53 PM PDT	Lake Wind Advisory	REV	29 hr
Jun 24, 2:55 PM PDT	Lake Wind Advisory	REV	29 hr
Jul 2, 4:06 PM PDT	Areal Flood Advisory	REV	3 hr
Jul 2, 4:17 PM PDT	Flash Flood Warning	REV	3 hr
Jul 2, 10:37 PM PDT	Flash Flood Watch	REV	22 hr
Jul 25, 3:36 PM PDT	Flash Flood Warning	REV	3 hr
Jul 26, 10:19 AM PDT	Flash Flood Watch	REV	11 hr
Jul 29, 3:15 PM PDT	Fire Weather Watch	REV	47 hr
Aug 21, 2:28 AM PDT	Flash Flood Watch	REV	16 hr
Aug 21, 2:29 PM PDT	Severe Thunderstorm Warning	STO	46 min
Aug 21, 3:38 PM PDT	Severe Thunderstorm Warning	STO	22 min
Aug 23, 2:35 PM PDT	Dense Smoke Advisory	REV	53 hr
Aug 25, 2:41 AM PDT	Lake Wind Advisory	REV	17 hr
Aug 26, 3:37 PM PDT	Dense Smoke Advisory	REV	6 days
Sep 2, 10:40 AM PDT	Areal Flood Advisory	STO	12 hr
Sep 4, 6:20 AM PDT	Fire Weather Watch	REV	5 hr
Sep 4, 10:48 AM PDT	Lake Wind Advisory	REV	36 hr
Sep 4, 10:52 AM PDT	Red Flag Warning	REV	36 hr
Sep 14, 1:52 PM PDT	Lake Wind Advisory	REV	30 hr
Sep 16, 3:11 PM PDT	Lake Wind Advisory	REV	29 hr
Sep 18, 2:31 PM PDT	Fire Weather Watch	REV	18 hr
Sep 19, 8:29 AM PDT	Red Flag Warning	REV	52 hr
Sep 19, 2:55 PM PDT	Lake Wind Advisory	REV	50 hr
Sep 23, 3:43 PM PDT	Lake Wind Advisory	REV	37 hr
Sep 27, 2:26 PM PDT	Fire Weather Watch	REV	23 hr
Sep 28, 1:24 PM PDT	Red Flag Warning	REV	34 hr
Sep 28, 2:25 PM PDT	Lake Wind Advisory	REV	20 hr
Sep 28, 2:25 PM PDT	Wind Advisory	REV	30 hr
Sep 29, 1:40 PM PDT	Lake Wind Advisory	REV	27 hr
Oct 3, 3:02 AM PDT	Lake Wind Advisory	REV	41 hr
Oct 26, 2:17 PM PDT	Lake Wind Advisory	REV	13 hr
Oct 27, 3:02 AM PDT	Wind Advisory	REV	24 hr
Oct 27, 2:53 PM PDT	Winter Weather Advisory	REV	24 hr
Nov 1, 2:26 PM PDT	Lake Wind Advisory	REV	30 hr
Nov 6, 2:48 PM PST	Lake Wind Advisory	REV	28 hr
Nov 14, 2:26 AM PST	Lake Wind Advisory	REV	23 hr
Nov 19, 2:35 PM PST	Winter Weather Advisory	REV	32 hr
Nov 20, 2:42 PM PST	Wind Advisory	REV	37 hr
Nov 21, 3:20 PM PST	Lake Wind Advisory	REV	43 hr
Dec 1, 2:06 PM PST	Lake Wind Advisory	REV	38 hr
Dec 2, 11:06 AM PST	Winter Weather Advisory	REV	32 hr
Dec 5, 2:37 AM PST	Winter Storm Watch	REV	14 hr
Dec 5, 3:34 PM PST	Winter Storm Warning	REV	42 hr
Dec 6, 9:28 PM PST	Mesoscale Discussion	SPC	6 hr
Dec 7, 10:21 AM PST	Lake Wind Advisory	REV	8 hr
Dec 8, 2:20 PM PST	Lake Wind Advisory	REV	20 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	3
Mesoscale Discussion	2
Special Weather Statement	2
Flooding
Flash Flood Warning	2
Flash Flood Watch	3
Areal Flood Advisory	2
Winter
Winter Storm Warning	1
Winter Storm Watch	1
Winter Weather Advisory	6
Wind and dust
Lake Wind Advisory	47
Wind Advisory	4
Fire
Red Flag Warning	6
Fire Weather Watch	6
Fog and smoke
Dense Smoke Advisory	2
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 2012 2014

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.