Weather alerts in Gilliam County, Oregon, 2010

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

Gilliam County and its neighbors

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

Alerts: 58
Warnings: 11
Watches: 4
Advisories: 39
Busiest month: December14 alerts
Busiest day: May 17, 20105 alerts

Over time

By month

Warning verification

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

Gilliam County, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			0
Severe thunderstorm warnings	4	2	50%	2	50%	31 min
Flash flood warnings	0			0

Each office's whole area, 2010

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Pendleton, OR: severe thunderstorm warnings	20	14	30%	31	68%	16 min
NWS Pendleton, OR: flash flood warnings	6	3	50%	3	100%	29823 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 4, 5:30 PM PST	Dense Fog Advisory	PDT	35 hr
Jan 5, 1:56 PM PST	Winter Weather Advisory	PDT	18 hr
Jan 7, 3:16 PM PST	Winter Weather Advisory	PDT	45 hr
Jan 10, 3:40 AM PST	Freezing Rain Advisory	PDT	33 hr
Jan 22, 3:27 AM PST	Winter Weather Advisory	PDT	37 hr
Jan 30, 12:56 PM PST	Winter Weather Advisory	PDT	30 hr
Feb 2, 5:15 AM PST	Dense Fog Advisory	PDT	10 hr
Mar 11, 2:26 PM PST	Winter Storm Watch	PDT	13 hr
Mar 12, 3:37 AM PST	Winter Weather Advisory	PDT	27 hr
Apr 1, 2:19 PM PDT	Winter Weather Advisory	PDT	32 hr
Apr 7, 3:24 PM PDT	Wind Advisory	PDT	28 hr
Apr 27, 9:27 PM PDT	Winter Weather Advisory	PDT	8 hr
Apr 28, 12:40 PM PDT	Wind Advisory	PDT	3 days
May 1, 2:35 PM PDT	High Wind Watch	PDT	24 hr
May 2, 2:32 PM PDT	High Wind Warning	PDT	31 hr
May 4, 2:57 PM PDT	Winter Weather Advisory	PDT	31 hr
May 5, 2:34 PM PDT	Freeze Warning	PDT	18 hr
May 16, 5:04 PM PDT	Special Weather Statement	PDT	56 min
May 16, 5:13 PM PDT	Severe Thunderstorm Warning	PDT	62 min
May 17, 12:48 PM PDT	Mesoscale Discussion	SPC	57 min
May 17, 3:15 PM PDT	Severe Thunderstorm Warning	PDT	60 min
May 17, 4:13 PM PDT	Severe Thunderstorm Warning	PDT	62 min
May 19, 8:41 AM PDT	Wind Advisory	PDT	13 hr
May 19, 5:11 PM PDT	Severe Thunderstorm Warning	PDT	64 min
Jul 3, 8:17 PM PDT	Wind Advisory	PDT	27 hr
Jul 7, 1:55 PM PDT	Heat Advisory	PDT	55 hr
Jul 11, 11:01 AM PDT	Wind Advisory	PDT	35 hr
Jul 24, 11:45 AM PDT	Heat Advisory	PDT	56 hr
Aug 25, 2:59 PM PDT	Wind Advisory	PDT	31 hr
Sep 17, 9:47 PM PDT	Special Weather Statement	PDT	58 min
Sep 19, 3:55 PM PDT	Mesoscale Discussion	SPC	95 min
Oct 22, 9:34 PM PDT	Wind Advisory	PDT	33 hr
Oct 25, 9:06 AM PDT	Wind Advisory	PDT	11 hr
Nov 8, 2:16 PM PST	Freeze Warning	PDT	20 hr
Nov 15, 3:20 AM PST	High Wind Warning	PDT	31 hr
Nov 15, 3:20 AM PST	Wind Advisory	PDT	31 hr
Nov 20, 3:07 PM PST	Winter Storm Warning	PDT	67 hr
Nov 20, 3:07 PM PST	Winter Weather Advisory	PDT	61 hr
Nov 24, 10:02 PM PST	Winter Weather Advisory	PDT	3 days
Nov 24, 10:02 PM PST	Freezing Rain Advisory	PDT	41 hr
Nov 28, 3:56 PM PST	Winter Storm Watch	PDT	24 hr
Nov 29, 6:01 AM PST	Winter Storm Warning	PDT	52 hr
Nov 29, 6:01 AM PST	Winter Weather Advisory	PDT	52 hr
Nov 29, 4:41 PM PST	Freezing Fog Advisory	PDT	12 hr
Dec 1, 2:56 PM PST	Winter Weather Advisory	PDT	37 hr
Dec 2, 2:05 PM PST	Freezing Fog Advisory	PDT	22 hr
Dec 3, 12:02 PM PST	Freezing Fog Advisory	PDT	26 hr
Dec 16, 2:58 PM PST	Winter Storm Watch	PDT	23 hr
Dec 17, 2:26 PM PST	Winter Weather Advisory	PDT	44 hr
Dec 19, 11:29 AM PST	Winter Weather Advisory	PDT	20 hr
Dec 21, 4:53 PM PST	Dense Fog Advisory	PDT	17 hr
Dec 23, 4:19 AM PST	Freezing Fog Advisory	PDT	6 hr
Dec 23, 2:25 PM PST	Freezing Fog Advisory	PDT	22 hr
Dec 24, 6:52 PM PST	Freezing Fog Advisory	PDT	28 hr
Dec 27, 4:19 AM PST	Winter Storm Warning	PDT	3 days
Dec 27, 2:12 PM PST	Winter Weather Advisory	PDT	24 hr
Dec 28, 2:20 PM PST	Winter Weather Advisory	PDT	42 hr
Dec 29, 1:20 AM PST	Wind Advisory	PDT	8 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
Mesoscale Discussion	2
Special Weather Statement	2
Winter
Winter Storm Warning	3
Winter Storm Watch	3
Freezing Rain Advisory	2
Winter Weather Advisory	16
Heat
Heat Advisory	2
Cold
Freeze Warning	2
Wind and dust
High Wind Warning	2
High Wind Watch	1
Wind Advisory	10
Fog and smoke
Dense Fog Advisory	3
Freezing Fog Advisory	6

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.