Alert archive / California / Siskiyou County
Weather alerts in Siskiyou County, California, 2011
108 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Siskiyou County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 108
- Warnings
- 30
- Watches
- 21
- Advisories
- 51
- Busiest month
- March28 alerts
- Busiest day
- October 25, 20114 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Siskiyou County, 2011
| 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 | 0 | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Medford, OR: severe thunderstorm warnings | 9 | 1 | 89% | 8 | 25% | 1 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 |
|---|---|---|---|
| Dec 31, 10:49 PM PST | Winter Weather Advisory | MFR | 4 hr |
| Jan 3, 8:51 PM PST | Dense Fog Advisory | MFR | 13 hr |
| Jan 4, 9:41 PM PST | Dense Fog Advisory | MFR | 10 hr |
| Jan 6, 6:51 PM PST | Dense Fog Advisory | MFR | 14 hr |
| Jan 11, 3:27 AM PST | Winter Weather Advisory | MFR | 23 hr |
| Feb 12, 3:04 AM PST | High Wind Watch | MFR | 24 hr |
| Feb 12, 12:58 PM PST | Wind Advisory | MFR | 6 hr |
| Feb 12, 2:32 PM PST | Winter Storm Watch | MFR | 36 hr |
| Feb 13, 3:00 AM PST | High Wind Warning | MFR | 64 hr |
| Feb 13, 3:00 AM PST | Wind Advisory | MFR | 48 hr |
| Feb 14, 3:00 AM PST | Winter Storm Warning | MFR | 4 days |
| Feb 14, 3:00 AM PST | Winter Weather Advisory | MFR | 3 days |
| Feb 15, 3:18 AM PST | Winter Weather Advisory | MFR | 31 hr |
| Feb 21, 3:10 PM PST | Winter Storm Watch | MFR | 47 hr |
| Feb 23, 1:41 AM PST | Winter Storm Warning | MFR | 37 hr |
| Feb 23, 2:23 PM PST | Winter Weather Advisory | MFR | 45 hr |
| Feb 27, 2:48 PM PST | Winter Weather Advisory | MFR | 37 hr |
| Feb 27, 2:49 PM PST | Wind Advisory | MFR | 25 hr |
| Feb 28, 3:27 PM PST | Winter Storm Watch | MFR | 12 hr |
| Feb 28, 3:53 PM PST | High Wind Watch | MFR | 11 hr |
| Mar 1, 3:14 AM PST | High Wind Warning | MFR | 35 hr |
| Mar 1, 3:54 AM PST | Winter Storm Warning | MFR | 36 hr |
| Mar 1, 2:21 PM PST | Wind Advisory | MFR | 24 hr |
| Mar 9, 2:44 PM PST | Wind Advisory | MFR | 25 hr |
| Mar 11, 2:01 PM PST | High Wind Watch | MFR | 21 hr |
| Mar 12, 11:30 AM PST | High Wind Warning | MFR | 38 hr |
| Mar 12, 11:30 AM PST | Wind Advisory | MFR | 38 hr |
| Mar 12, 2:00 PM PST | Winter Weather Advisory | MFR | 32 hr |
| Mar 13, 2:27 PM PDT | Severe Thunderstorm Warning | MFR | 25 min |
| Mar 14, 2:05 PM PDT | Wind Advisory | MFR | 33 hr |
| Mar 14, 2:05 PM PDT | Winter Weather Advisory | MFR | 45 hr |
| Mar 16, 2:33 PM PDT | Winter Storm Watch | MFR | 13 hr |
| Mar 17, 3:44 AM PDT | Winter Storm Warning | MFR | 35 hr |
| Mar 17, 3:56 AM PDT | Wind Advisory | MFR | 33 hr |
| Mar 17, 2:46 PM PDT | High Wind Warning | MFR | 15 hr |
| Mar 18, 2:37 PM PDT | Winter Storm Watch | MFR | 12 hr |
| Mar 18, 2:37 PM PDT | Winter Weather Advisory | MFR | 20 hr |
| Mar 19, 3:06 AM PDT | Winter Storm Warning | MFR | 34 hr |
| Mar 19, 3:02 PM PDT | Winter Weather Advisory | MFR | 22 hr |
| Mar 21, 2:48 PM PDT | Winter Storm Watch | MFR | 37 hr |
| Mar 22, 8:55 AM PDT | Winter Storm Warning | MFR | 66 hr |
| Mar 22, 2:22 PM PDT | High Wind Watch | MFR | 24 hr |
| Mar 22, 5:23 PM PDT | Winter Weather Advisory | MFR | 10 hr |
| Mar 23, 2:37 PM PDT | High Wind Warning | MFR | 23 hr |
| Mar 24, 2:59 PM PDT | Winter Storm Watch | MFR | 12 hr |
| Mar 25, 3:08 AM PDT | Winter Storm Warning | MFR | 32 hr |
| Mar 25, 6:45 AM PDT | Winter Weather Advisory | MFR | 28 hr |
| Mar 26, 1:54 PM PDT | Winter Weather Advisory | MFR | 35 hr |
| Apr 13, 3:48 AM PDT | Frost Advisory | MFR | 26 hr |
| Apr 24, 3:07 PM PDT | Wind Advisory | MFR | 29 hr |
| Apr 30, 3:21 AM PDT | Frost Advisory | MFR | 30 hr |
| Apr 30, 3:21 AM PDT | Freeze Warning | MFR | 30 hr |
| May 3, 8:11 PM PDT | Frost Advisory | MFR | 12 hr |
| May 9, 3:37 AM PDT | Freeze Watch | MFR | 10 hr |
| May 9, 1:54 PM PDT | Frost Advisory | MFR | 18 hr |
| May 28, 9:20 PM PDT | Frost Advisory | MFR | 10 hr |
| May 29, 3:07 PM PDT | Frost Advisory | MFR | 17 hr |
| Jun 7, 2:00 PM PDT | Frost Advisory | MFR | 18 hr |
| Jun 8, 2:00 PM PDT | Frost Advisory | MFR | 18 hr |
| Jul 31, 5:06 PM PDT | Special Weather Statement | MFR | 24 min |
| Jul 31, 7:07 PM PDT | Fire Weather Watch | MFR | 14 hr |
| Aug 1, 4:32 AM PDT | Red Flag Warning | MFR | 13 hr |
| Aug 6, 5:53 PM PDT | Severe Thunderstorm Warning | MFR | 22 min |
| Aug 6, 6:10 PM PDT | Special Weather Statement | MFR | 50 min |
| Aug 7, 6:25 PM PDT | Special Weather Statement | MFR | 20 min |
| Aug 7, 7:58 PM PDT | Special Weather Statement | MFR | 32 min |
| Aug 23, 1:58 PM PDT | Fire Weather Watch | MFR | 14 hr |
| Aug 24, 4:00 AM PDT | Red Flag Warning | MFR | 16 hr |
| Aug 26, 1:50 PM PDT | Fire Weather Watch | MFR | 7 hr |
| Aug 26, 8:30 PM PDT | Red Flag Warning | MFR | 22 hr |
| Aug 31, 1:42 PM PDT | Freeze Warning | MFR | 19 hr |
| Sep 1, 1:31 PM PDT | Fire Weather Watch | MFR | 16 hr |
| Sep 1, 1:31 PM PDT | Red Flag Warning | MFR | 45 hr |
| Sep 6, 2:44 PM PDT | Fire Weather Watch | MFR | 48 hr |
| Sep 7, 5:07 AM PDT | Red Flag Warning | MFR | 41 hr |
| Sep 8, 5:51 AM PDT | Red Flag Warning | MFR | 17 hr |
| Sep 8, 2:44 PM PDT | Red Flag Warning | MFR | 3 days |
| Sep 12, 5:00 AM PDT | Red Flag Warning | MFR | 17 hr |
| Sep 12, 5:02 PM PDT | Severe Thunderstorm Warning | MFR | 28 min |
| Sep 12, 5:59 PM PDT | Special Weather Statement | MFR | 16 min |
| Sep 12, 6:21 PM PDT | Special Weather Statement | MFR | 24 min |
| Sep 16, 9:47 AM PDT | Frost Advisory | MFR | 22 hr |
| Sep 23, 2:31 PM PDT | Red Flag Warning | MFR | 32 hr |
| Sep 25, 9:40 AM PDT | Frost Advisory | MFR | 22 hr |
| Oct 1, 2:40 AM PDT | Wind Advisory | MFR | 17 hr |
| Oct 3, 3:10 AM PDT | High Wind Watch | MFR | 24 hr |
| Oct 4, 2:40 AM PDT | Wind Advisory | MFR | 25 hr |
| Oct 5, 3:44 AM PDT | Frost Advisory | MFR | 28 hr |
| Oct 23, 1:59 PM PDT | Freeze Watch | MFR | 14 hr |
| Oct 24, 3:32 AM PDT | Frost Advisory | MFR | 29 hr |
| Oct 24, 3:32 AM PDT | Freeze Warning | MFR | 29 hr |
| Oct 24, 1:57 PM PDT | Freeze Watch | MFR | 13 hr |
| Oct 25, 3:18 AM PDT | Frost Advisory | MFR | 30 hr |
| Oct 25, 3:18 AM PDT | Freeze Warning | MFR | 30 hr |
| Oct 25, 2:04 PM PDT | Frost Advisory | MFR | 43 hr |
| Oct 25, 2:04 PM PDT | Freeze Warning | MFR | 43 hr |
| Nov 3, 6:38 PM PDT | Winter Weather Advisory | MFR | 12 hr |
| Nov 4, 2:53 PM PDT | Winter Weather Advisory | MFR | 43 hr |
| Nov 16, 2:32 PM PST | Winter Weather Advisory | MFR | 67 hr |
| Nov 19, 2:35 PM PST | Winter Weather Advisory | MFR | 15 hr |
| Nov 21, 3:00 AM PST | High Wind Warning | MFR | 61 hr |
| Nov 21, 2:18 PM PST | Winter Weather Advisory | MFR | 17 hr |
| Nov 22, 2:07 PM PST | Winter Weather Advisory | MFR | 38 hr |
| Nov 29, 2:11 PM PST | Air Stagnation Advisory | MFR | 15 days |
| Dec 14, 1:59 PM PST | Winter Weather Advisory | MFR | 14 hr |
| Dec 26, 2:14 AM PST | High Wind Watch | MFR | 32 hr |
| Dec 29, 7:07 PM PST | Wind Advisory | MFR | 8 hr |
| Dec 30, 1:12 PM PST | Wind Advisory | MFR | 4 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 |
| Special Weather Statement | 6 |
| Winter | |
| Winter Storm Warning | 7 |
| Winter Storm Watch | 7 |
| Winter Weather Advisory | 20 |
| Cold | |
| Freeze Warning | 5 |
| Freeze Watch | 3 |
| Frost Advisory | 14 |
| Wind and dust | |
| High Wind Warning | 6 |
| High Wind Watch | 6 |
| Wind Advisory | 13 |
| Fire | |
| Red Flag Warning | 9 |
| Fire Weather Watch | 5 |
| Fog and smoke | |
| Air Stagnation Advisory | 1 |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.