Alert archive / California / Sierra County

Weather alerts in Sierra County, California, 2014

81 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Sierra County and its neighbors

Each county as a circle sized by its count in 2014. Tap one for its archive.

Alerts: 81
Warnings: 22
Watches: 15
Advisories: 23
Busiest month: July19 alerts
Busiest day: August 11, 20147 alerts

Over time

By month

Warning verification

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

Sierra County, 2014

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	9	1	89%	1	100%	29 min
Flash flood warnings	2	0	100%	0

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 28, 2:51 AM PST	Winter Storm Watch	REV	25 hr
Jan 29, 3:30 AM PST	Winter Weather Advisory	REV	37 hr
Jan 30, 2:47 PM PST	Winter Weather Advisory	REV	13 hr
Feb 6, 2:43 PM PST	Winter Storm Warning	REV	45 hr
Feb 7, 2:27 AM PST	Wind Advisory	REV	34 hr
Feb 8, 9:19 AM PST	Flood Watch	REV	26 hr
Feb 11, 2:45 AM PST	Freezing Fog Advisory	REV	7 hr
Feb 11, 3:05 PM PST	Wind Advisory	REV	28 hr
Feb 13, 3:36 AM PST	High Wind Watch	REV	30 hr
Feb 14, 9:10 AM PST	High Wind Warning	REV	43 hr
Feb 25, 12:41 PM PST	Winter Weather Advisory	REV	45 hr
Feb 28, 1:20 PM PST	Areal Flood Advisory	STO	6 hr
Mar 27, 1:55 PM PDT	Winter Storm Watch	REV	24 hr
Mar 28, 2:09 PM PDT	Winter Weather Advisory	REV	37 hr
Mar 30, 2:20 PM PDT	Winter Weather Advisory	REV	36 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 10, 12:10 PM PDT	Red Flag Warning	REV	18 hr
Jul 15, 3:07 PM PDT	Flash Flood Watch	REV	54 hr
Jul 17, 5:18 PM PDT	Severe Thunderstorm Warning	REV	42 min
Jul 17, 6:02 PM PDT	Special Weather Statement	REV	58 min
Jul 17, 6:45 PM PDT	Special Weather Statement	STO	45 min
Jul 17, 6:58 PM PDT	Severe Thunderstorm Warning	STO	47 min
Jul 18, 3:44 PM PDT	Severe Thunderstorm Warning	REV	61 min
Jul 18, 4:36 PM PDT	Areal Flood Advisory	REV	3 hr
Jul 19, 2:14 PM PDT	Special Weather Statement	REV	46 min
Jul 19, 2:45 PM PDT	Severe Thunderstorm Warning	REV	45 min
Jul 19, 2:56 PM PDT	Special Weather Statement	REV	34 min
Jul 19, 3:49 PM PDT	Flash Flood Warning	REV	3 hr
Jul 19, 4:31 PM PDT	Special Weather Statement	REV	59 min
Jul 29, 7:25 PM PDT	Special Weather Statement	REV	50 min
Jul 30, 11:53 AM PDT	Special Weather Statement	REV	37 min
Jul 31, 12:56 PM PDT	Special Weather Statement	REV	64 min
Jul 31, 3:31 PM PDT	Special Weather Statement	REV	59 min
Jul 31, 4:47 PM PDT	Special Weather Statement	REV	58 min
Jul 31, 5:19 PM PDT	Special Weather Statement	REV	41 min
Aug 6, 4:03 PM PDT	Flash Flood Warning	REV	3 hr
Aug 6, 4:47 PM PDT	Special Weather Statement	REV	43 min
Aug 6, 4:52 PM PDT	Severe Thunderstorm Warning	REV	38 min
Aug 6, 5:01 PM PDT	Special Weather Statement	STO	44 min
Aug 8, 3:05 PM PDT	Special Weather Statement	REV	25 min
Aug 10, 3:06 PM PDT	Special Weather Statement	REV	24 min
Aug 10, 3:40 PM PDT	Special Weather Statement	REV	35 min
Aug 10, 3:43 PM PDT	Severe Thunderstorm Warning	REV	47 min
Aug 10, 4:11 PM PDT	Special Weather Statement	REV	64 min
Aug 10, 5:11 PM PDT	Special Weather Statement	REV	49 min
Aug 11, 9:16 AM PDT	Fire Weather Watch	REV	23 hr
Aug 11, 1:14 PM PDT	Special Weather Statement	REV	61 min
Aug 11, 1:15 PM PDT	Special Weather Statement	STO	45 min
Aug 11, 2:42 PM PDT	Mesoscale Discussion	SPC	2 hr
Aug 11, 3:53 PM PDT	Severe Thunderstorm Warning	STO	39 min
Aug 11, 4:44 PM PDT	Severe Thunderstorm Warning	STO	61 min
Aug 11, 5:42 PM PDT	Severe Thunderstorm Warning	REV	33 min
Aug 12, 11:38 AM PDT	Lake Wind Advisory	REV	32 hr
Sep 22, 8:04 AM PDT	Fire Weather Watch	REV	27 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
Oct 1, 12:28 PM PDT	Freeze Warning	REV	21 hr
Oct 12, 2:25 PM PDT	Wind Advisory	REV	69 hr
Oct 23, 2:37 PM PDT	Wind Advisory	REV	53 hr
Nov 20, 3:32 PM PST	High Wind Watch	REV	20 hr
Nov 21, 11:27 AM PST	High Wind Warning	REV	32 hr
Dec 3, 7:37 AM PST	Areal Flood Advisory	STO	12 hr
Dec 3, 7:20 PM PST	Areal Flood Advisory	STO	12 hr
Dec 8, 10:39 AM PST	Flood Watch	STO	3 days
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, 1:57 PM PST	Areal Flood Warning	STO	12 hr
Dec 23, 3:50 PM PST	Winter Weather Advisory	REV	28 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	9
Mesoscale Discussion	1
Special Weather Statement	20
Flooding
Areal Flood Warning	1
Flash Flood Warning	2
Flash Flood Watch	1
Flood Watch	2
Areal Flood Advisory	5
Winter
Winter Storm Warning	2
Winter Storm Watch	2
Winter Weather Advisory	6
Cold
Freeze Warning	1
Wind and dust
High Wind Warning	3
High Wind Watch	4
Lake Wind Advisory	5
Wind Advisory	5
Fire
Red Flag Warning	4
Fire Weather Watch	6
Fog and smoke
Dense Smoke Advisory	1
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.