Alert archive / Idaho / Valley County
Weather alerts in Valley County, Idaho, 2008
71 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Valley County and its neighbors
Each county as a circle sized by its count in 2008. Tap one for its archive.
- Alerts
- 71
- Warnings
- 27
- Watches
- 22
- Advisories
- 19
- Busiest month
- December17 alerts
- Busiest day
- January 9, 20082 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Valley County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 0 | ||||
| Flash flood warnings | 1 | 1 | 0% | 2 | 100% | 55 min |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: tornado warnings | 1 | 1 | 0% | 1 | 100% | 37 min |
| NWS Boise, ID: severe thunderstorm warnings | 21 | 9 | 57% | 29 | 62% | 16 min |
| NWS Boise, ID: flash flood warnings | 2 | 1 | 50% | 2 | 100% | 55 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 2:15 PM MST | Winter Storm Watch | BOI | 24 hr |
| Jan 3, 2:39 PM MST | Winter Storm Warning | BOI | 44 hr |
| Jan 6, 12:04 PM MST | Winter Storm Watch | BOI | 34 hr |
| Jan 7, 3:16 PM MST | Winter Storm Warning | BOI | 36 hr |
| Jan 9, 3:44 AM MST | Winter Storm Watch | BOI | 10 hr |
| Jan 9, 1:46 PM MST | Snow Advisory | BOI | 19 hr |
| Jan 25, 3:30 PM MST | Winter Storm Warning | BOI | 68 hr |
| Jan 28, 2:36 PM MST | Heavy Snow Warning | BOI | 32 hr |
| Jan 30, 4:08 AM MST | Winter Storm Watch | BOI | 7 hr |
| Jan 30, 11:27 AM MST | Winter Storm Warning | BOI | 36 hr |
| Feb 1, 3:34 PM MST | Winter Storm Watch | BOI | 6 hr |
| Feb 1, 9:32 PM MST | Winter Storm Warning | BOI | 40 hr |
| Feb 4, 2:54 PM MST | Winter Storm Watch | BOI | 12 hr |
| Feb 5, 3:23 AM MST | Winter Storm Warning | BOI | 25 hr |
| Feb 6, 10:13 AM MST | Winter Storm Warning | BOI | 28 hr |
| Feb 22, 7:42 PM MST | Snow Advisory | BOI | 9 hr |
| Feb 24, 2:50 AM MST | Snow Advisory | BOI | 8 hr |
| Feb 29, 2:25 PM MST | Snow Advisory | BOI | 22 hr |
| Mar 12, 2:42 AM MDT | Snow Advisory | BOI | 42 hr |
| Mar 25, 4:14 AM MDT | Snow Advisory | BOI | 38 hr |
| Mar 27, 3:35 PM MDT | Snow and Blowing Snow Advisory | BOI | 32 hr |
| Mar 30, 2:40 PM MDT | Snow Advisory | BOI | 15 hr |
| May 28, 10:06 AM MDT | Flash Flood Watch | BOI | 19 hr |
| Jun 10, 1:43 PM MDT | Snow Advisory | BOI | 19 hr |
| Jul 20, 2:42 PM MDT | Fire Weather Watch | BOI | 37 hr |
| Jul 21, 3:31 PM MDT | Flash Flood Watch | BOI | 26 hr |
| Jul 22, 12:05 PM MDT | Flash Flood Warning | BOI | 115 min |
| Jul 22, 12:16 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 5, 1:10 PM MDT | Fire Weather Watch | BOI | 25 hr |
| Aug 5, 2:31 PM MDT | Fire Weather Watch | PIH | 38 hr |
| Aug 6, 1:40 PM MDT | Red Flag Warning | BOI | 55 hr |
| Aug 7, 4:55 AM MDT | Red Flag Warning | PIH | 19 hr |
| Aug 8, 3:06 AM MDT | Flash Flood Watch | BOI | 18 hr |
| Aug 8, 3:39 AM MDT | Red Flag Warning | PIH | 20 hr |
| Aug 9, 2:44 AM MDT | Red Flag Warning | PIH | 18 hr |
| Aug 15, 1:35 PM MDT | Fire Weather Watch | BOI | 25 hr |
| Aug 16, 2:55 PM MDT | Red Flag Warning | BOI | 54 hr |
| Aug 18, 3:41 AM MDT | Fire Weather Watch | BOI | 24 hr |
| Aug 19, 2:25 AM MDT | Red Flag Warning | PIH | 17 hr |
| Aug 19, 3:48 AM MDT | Red Flag Warning | BOI | 11 hr |
| Aug 24, 2:56 PM MDT | Red Flag Warning | PIH | 30 hr |
| Aug 26, 2:13 PM MDT | Red Flag Warning | PIH | 31 hr |
| Sep 8, 2:00 PM MDT | Fire Weather Watch | PIH | 19 hr |
| Sep 9, 8:32 AM MDT | Red Flag Warning | PIH | 12 hr |
| Sep 9, 2:56 PM MDT | Fire Weather Watch | PIH | 12 hr |
| Sep 15, 2:47 PM MDT | Fire Weather Watch | BOI | 23 hr |
| Sep 16, 2:02 PM MDT | Red Flag Warning | BOI | 30 hr |
| Sep 19, 2:14 PM MDT | Red Flag Warning | PIH | 30 hr |
| Sep 24, 2:01 PM MDT | Fire Weather Watch | PIH | 14 hr |
| Sep 25, 3:50 AM MDT | Red Flag Warning | PIH | 16 hr |
| Oct 9, 2:12 PM MDT | Wind Advisory | BOI | 31 hr |
| Oct 9, 2:12 PM MDT | Wind Advisory | BOI | 55 hr |
| Nov 3, 9:13 PM MST | Winter Weather Advisory | BOI | 17 hr |
| Nov 30, 8:33 AM MST | Dense Fog Advisory | BOI | 2 hr |
| Nov 30, 9:01 PM MST | Dense Fog Advisory | BOI | 16 hr |
| Dec 7, 2:53 PM MST | Winter Weather Advisory | BOI | 12 hr |
| Dec 11, 3:50 AM MST | Winter Storm Watch | BOI | 24 hr |
| Dec 12, 4:12 AM MST | Winter Storm Warning | BOI | 25 hr |
| Dec 13, 2:44 PM MST | Winter Weather Advisory | BOI | 20 hr |
| Dec 16, 2:40 PM MST | Winter Storm Watch | BOI | 25 hr |
| Dec 17, 3:45 PM MST | Winter Storm Warning | BOI | 36 hr |
| Dec 19, 1:32 PM MST | Winter Storm Watch | BOI | 24 hr |
| Dec 20, 1:09 PM MST | Winter Storm Warning | BOI | 46 hr |
| Dec 21, 4:47 PM MST | Mesoscale Discussion | SPC | 4 hr |
| Dec 23, 3:46 AM MST | Winter Storm Watch | BOI | 12 hr |
| Dec 23, 3:43 PM MST | Winter Storm Warning | BOI | 46 hr |
| Dec 26, 2:43 AM MST | Winter Weather Advisory | BOI | 62 hr |
| Dec 27, 3:18 AM MST | Winter Storm Warning | BOI | 56 hr |
| Dec 27, 1:26 PM MST | Mesoscale Discussion | SPC | 3 hr |
| Dec 29, 2:43 PM MST | Wind Advisory | BOI | 5 hr |
| Dec 30, 3:45 PM MST | Winter Weather Advisory | BOI | 49 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 | |
| Mesoscale Discussion | 3 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 3 |
| Winter | |
| Heavy Snow Warning | 1 |
| Winter Storm Warning | 12 |
| Winter Storm Watch | 10 |
| Snow Advisory | 8 |
| Snow and Blowing Snow Advisory | 1 |
| Winter Weather Advisory | 5 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 13 |
| Fire Weather Watch | 9 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20072009
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.