Alert archive / California / Modoc County

Weather alerts in Modoc County, California, 2010

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

Modoc County and its neighbors

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

Alerts: 106
Warnings: 33
Watches: 25
Advisories: 47
Busiest month: September18 alerts
Busiest day: September 9, 20103 alerts

Over time

By month

Warning verification

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

Modoc County, 2010

	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, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Medford, OR: severe thunderstorm warnings	23	10	57%	17	82%	15 min
NWS Medford, OR: flash flood warnings	1	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 9, 3:42 PM PST	Freezing Fog Advisory	REV	21 hr
Jan 18, 4:02 AM PST	Winter Weather Advisory	REV	21 hr
Jan 19, 2:34 PM PST	Winter Weather Advisory	MFR	37 hr
Jan 20, 3:00 AM PST	Winter Weather Advisory	REV	24 hr
Jan 24, 3:14 PM PST	Winter Weather Advisory	REV	37 hr
Jan 25, 3:06 AM PST	Winter Storm Warning	MFR	28 hr
Jan 25, 3:06 AM PST	Winter Weather Advisory	MFR	28 hr
Feb 22, 2:23 PM PST	Winter Weather Advisory	REV	44 hr
Feb 23, 2:56 AM PST	Winter Weather Advisory	MFR	27 hr
Mar 7, 4:00 AM PST	Winter Weather Advisory	MFR	35 hr
Mar 8, 10:03 AM PST	Winter Weather Advisory	REV	12 hr
Mar 27, 1:22 PM PDT	High Wind Watch	REV	23 hr
Mar 27, 2:18 PM PDT	Wind Advisory	MFR	54 hr
Mar 28, 3:57 AM PDT	High Wind Warning	REV	59 hr
Mar 29, 11:12 AM PDT	Winter Weather Advisory	REV	28 hr
Mar 29, 2:16 PM PDT	Winter Weather Advisory	MFR	39 hr
Mar 31, 1:59 PM PDT	High Wind Watch	MFR	25 hr
Apr 1, 3:27 PM PDT	Wind Advisory	MFR	29 hr
Apr 1, 3:36 PM PDT	Wind Advisory	REV	31 hr
Apr 20, 3:20 PM PDT	Winter Weather Advisory	MFR	21 hr
Apr 25, 2:55 PM PDT	Wind Advisory	MFR	42 hr
May 2, 2:02 PM PDT	High Wind Warning	MFR	31 hr
May 2, 2:18 PM PDT	Wind Advisory	REV	30 hr
May 18, 2:02 PM PDT	Wind Advisory	MFR	35 hr
May 21, 2:14 PM PDT	Freeze Warning	MFR	19 hr
May 21, 2:14 PM PDT	Freeze Warning	MFR	43 hr
May 23, 2:48 AM PDT	Freeze Watch	MFR	12 hr
May 23, 2:41 PM PDT	Freeze Warning	MFR	17 hr
May 27, 3:43 AM PDT	Freeze Watch	MFR	22 hr
May 28, 2:02 AM PDT	Freeze Warning	MFR	31 hr
Jun 9, 1:59 PM PDT	Frost Advisory	MFR	42 hr
Jun 16, 2:52 PM PDT	Frost Advisory	MFR	16 hr
Jun 20, 3:18 AM PDT	Frost Advisory	MFR	29 hr
Jun 25, 5:34 PM PDT	Special Weather Statement	MFR	41 min
Jul 16, 2:42 PM PDT	Fire Weather Watch	REV	3 days
Jul 17, 2:52 PM PDT	Red Flag Warning	REV	30 hr
Jul 22, 2:00 PM PDT	Fire Weather Watch	MFR	3 days
Jul 23, 9:31 AM PDT	Fire Weather Watch	REV	32 hr
Jul 24, 9:21 AM PDT	Red Flag Warning	REV	57 hr
Jul 24, 10:57 AM PDT	Red Flag Warning	MFR	35 hr
Jul 25, 3:03 PM PDT	Severe Thunderstorm Warning	MFR	27 min
Jul 26, 9:16 AM PDT	Red Flag Warning	REV	9 hr
Jul 27, 5:30 AM PDT	Fire Weather Watch	REV	5 hr
Jul 27, 10:22 AM PDT	Red Flag Warning	REV	22 hr
Jul 28, 2:51 PM PDT	Fire Weather Watch	REV	45 hr
Jul 29, 12:16 PM PDT	Red Flag Warning	REV	34 hr
Jul 30, 12:17 PM PDT	Red Flag Warning	REV	32 hr
Aug 8, 8:15 AM PDT	Flash Flood Watch	REV	13 hr
Aug 15, 3:12 PM PDT	Fire Weather Watch	REV	39 hr
Aug 16, 9:36 AM PDT	Red Flag Warning	REV	39 hr
Aug 16, 3:02 PM PDT	Red Flag Warning	MFR	30 hr
Aug 19, 9:35 AM PDT	Fire Weather Watch	REV	22 hr
Aug 19, 1:22 PM PDT	Fire Weather Watch	MFR	21 hr
Aug 20, 7:40 AM PDT	Red Flag Warning	REV	39 hr
Aug 20, 10:46 AM PDT	Red Flag Warning	MFR	34 hr
Aug 24, 11:01 AM PDT	Fire Weather Watch	REV	52 hr
Aug 24, 2:00 PM PDT	Fire Weather Watch	MFR	23 hr
Aug 25, 10:36 AM PDT	Red Flag Warning	REV	37 hr
Aug 25, 12:51 PM PDT	Red Flag Warning	MFR	33 hr
Sep 2, 1:00 PM PDT	Fire Weather Watch	REV	22 hr
Sep 3, 2:39 PM PDT	Freeze Watch	MFR	24 hr
Sep 4, 2:52 PM PDT	Freeze Warning	MFR	41 hr
Sep 6, 4:18 AM PDT	Fire Weather Watch	MFR	7 hr
Sep 9, 3:01 AM PDT	Freeze Watch	MFR	11 hr
Sep 9, 1:51 PM PDT	Frost Advisory	MFR	7 hr
Sep 9, 1:51 PM PDT	Freeze Warning	MFR	19 hr
Sep 10, 3:23 AM PDT	Frost Advisory	MFR	29 hr
Sep 10, 1:55 PM PDT	Freeze Warning	MFR	19 hr
Sep 11, 2:30 PM PDT	Frost Advisory	MFR	18 hr
Sep 12, 2:22 PM PDT	Frost Advisory	MFR	18 hr
Sep 20, 3:12 AM PDT	Frost Advisory	MFR	29 hr
Sep 21, 2:00 PM PDT	Frost Advisory	MFR	18 hr
Sep 22, 3:32 AM PDT	Freeze Watch	MFR	10 hr
Sep 22, 1:30 PM PDT	Freeze Warning	MFR	19 hr
Sep 23, 3:41 AM PDT	Freeze Watch	MFR	10 hr
Sep 23, 1:39 PM PDT	Freeze Warning	MFR	18 hr
Sep 24, 3:03 AM PDT	Frost Advisory	MFR	29 hr
Oct 4, 4:13 AM PDT	Freeze Watch	MFR	11 hr
Oct 23, 3:17 AM PDT	Wind Advisory	MFR	41 hr
Nov 9, 2:57 PM PST	Winter Weather Advisory	REV	19 hr
Nov 17, 3:12 PM PST	Wind Advisory	REV	49 hr
Nov 18, 2:25 PM PST	Winter Weather Advisory	MFR	38 hr
Nov 18, 3:00 PM PST	Winter Storm Watch	REV	24 hr
Nov 18, 3:00 PM PST	Winter Storm Warning	REV	3 days
Nov 19, 2:19 AM PST	Winter Storm Warning	MFR	53 hr
Nov 21, 3:09 AM PST	Winter Storm Watch	REV	34 hr
Nov 21, 3:33 PM PST	Winter Weather Advisory	REV	18 hr
Nov 22, 3:31 AM PST	Wind Advisory	REV	24 hr
Nov 22, 5:02 AM PST	Winter Storm Warning	REV	35 hr
Nov 22, 12:48 PM PST	Winter Storm Warning	MFR	21 hr
Nov 25, 2:42 PM PST	Winter Weather Advisory	MFR	46 hr
Nov 26, 2:40 AM PST	Winter Weather Advisory	REV	49 hr
Dec 2, 4:03 AM PST	Winter Weather Advisory	MFR	18 hr
Dec 7, 3:53 AM PST	Wind Advisory	MFR	28 hr
Dec 7, 12:43 PM PST	Wind Advisory	REV	27 hr
Dec 10, 2:48 PM PST	Wind Advisory	MFR	31 hr
Dec 12, 3:13 AM PST	High Wind Watch	MFR	25 hr
Dec 13, 4:33 AM PST	High Wind Warning	MFR	33 hr
Dec 13, 3:11 PM PST	Wind Advisory	REV	28 hr
Dec 16, 4:08 PM PST	Winter Storm Warning	REV	4 days
Dec 16, 9:40 PM PST	Winter Weather Advisory	REV	31 hr
Dec 17, 4:11 PM PST	Winter Weather Advisory	MFR	71 hr
Dec 18, 3:19 PM PST	Winter Weather Advisory	MFR	37 hr
Dec 27, 4:18 AM PST	Winter Weather Advisory	MFR	58 hr
Dec 28, 4:34 AM PST	Winter Weather Advisory	REV	39 hr
Dec 28, 4:45 AM PST	Winter Storm Warning	MFR	23 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
Special Weather Statement	1
Flooding
Flash Flood Watch	1
Winter
Winter Storm Warning	7
Winter Storm Watch	2
Winter Weather Advisory	23
Cold
Freeze Warning	9
Freeze Watch	7
Frost Advisory	10
Wind and dust
High Wind Warning	3
High Wind Watch	3
Wind Advisory	13
Fire
Red Flag Warning	13
Fire Weather Watch	12
Fog and smoke
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 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.