Alert archive / Idaho / Clearwater County
Weather alerts in Clearwater County, Idaho, 2009
71 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clearwater County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 71
- Warnings
- 19
- Watches
- 12
- Advisories
- 35
- Busiest month
- January21 alerts
- Busiest day
- January 5, 20094 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Clearwater County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 1 | 75% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 30 | 13 | 57% | 35 | 80% | 22 min |
| NWS Missoula, MT: flash flood warnings | 3 | 1 | 67% | 8 | 13% | 48 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, 6:15 PM PST | Winter Weather Advisory | MSO | 107 min |
| Jan 1, 3:04 AM PST | High Wind Warning | MSO | 32 hr |
| Jan 1, 3:22 AM PST | Winter Storm Warning | MSO | 37 hr |
| Jan 3, 2:03 PM PST | Winter Storm Watch | MSO | 13 hr |
| Jan 4, 3:10 AM PST | Winter Storm Warning | MSO | 41 hr |
| Jan 4, 10:04 PM PST | Mesoscale Discussion | SPC | 4 hr |
| Jan 5, 1:20 PM PST | Wind Advisory | MSO | 3 days |
| Jan 5, 1:56 PM PST | Winter Storm Watch | MSO | 13 hr |
| Jan 5, 2:57 PM PST | Flood Watch | MSO | 44 hr |
| Jan 6, 3:15 AM PST | Winter Storm Warning | MSO | 30 hr |
| Jan 7, 11:12 AM PST | Areal Flood Advisory | MSO | 24 hr |
| Jan 8, 4:22 PM PST | Areal Flood Advisory | MSO | 18 hr |
| Jan 10, 12:26 PM PST | Winter Weather Advisory | MSO | 16 hr |
| Jan 11, 1:08 AM PST | Winter Storm Warning | MSO | 4 hr |
| Jan 11, 1:31 PM PST | Wind Advisory | MSO | 4 hr |
| Jan 16, 6:27 AM PST | Dense Fog Advisory | MSO | 49 hr |
| Jan 17, 9:33 AM PST | Dense Fog Advisory | MSO | 26 hr |
| Jan 24, 2:25 AM PST | Winter Weather Advisory | MSO | 32 hr |
| Jan 26, 1:41 PM PST | Winter Weather Advisory | MSO | 48 hr |
| Jan 27, 5:54 PM PST | Winter Storm Warning | MSO | 9 hr |
| Jan 30, 11:18 PM PST | Wind Advisory | MSO | 5 hr |
| Feb 23, 3:28 PM PST | Wind Advisory | MSO | 12 hr |
| Feb 25, 3:32 AM PST | Winter Storm Warning | MSO | 42 hr |
| Feb 25, 1:45 PM PST | Winter Storm Watch | MSO | 13 hr |
| Feb 26, 2:53 AM PST | Winter Weather Advisory | MSO | 13 hr |
| Mar 3, 5:19 AM PST | Dense Fog Advisory | MSO | 3 hr |
| Mar 3, 1:08 PM PST | Winter Storm Watch | MSO | 43 hr |
| Mar 4, 1:27 PM PST | Wind Advisory | MSO | 26 hr |
| Mar 4, 1:29 PM PST | Winter Storm Warning | MSO | 42 hr |
| Mar 4, 1:29 PM PST | Winter Weather Advisory | MSO | 44 hr |
| Mar 5, 11:52 AM PST | Mesoscale Discussion | SPC | 4 hr |
| Mar 7, 3:24 AM PST | Winter Storm Warning | MSO | 37 hr |
| Mar 7, 3:24 AM PST | Winter Weather Advisory | MSO | 37 hr |
| Mar 9, 3:45 AM PDT | Winter Weather Advisory | MSO | 32 hr |
| Mar 13, 1:44 PM PDT | Winter Weather Advisory | MSO | 3 days |
| Mar 15, 1:12 PM PDT | Wind Advisory | MSO | 6 hr |
| Mar 23, 1:10 PM PDT | Winter Storm Watch | MSO | 38 hr |
| Mar 24, 1:12 PM PDT | Winter Storm Warning | MSO | 33 hr |
| Mar 27, 2:09 PM PDT | Winter Storm Watch | MSO | 13 hr |
| Mar 28, 3:10 AM PDT | Winter Storm Warning | MSO | 44 hr |
| Mar 30, 1:51 PM PDT | Winter Weather Advisory | MSO | 39 hr |
| Apr 1, 8:58 PM PDT | Winter Storm Warning | MSO | 24 hr |
| Apr 1, 8:58 PM PDT | Winter Weather Advisory | MSO | 32 hr |
| May 14, 5:20 AM PDT | Wind Advisory | MSO | 5 hr |
| May 18, 6:07 PM PDT | Mesoscale Discussion | SPC | 83 min |
| May 18, 7:43 PM PDT | Severe Thunderstorm Warning | MSO | 22 min |
| May 18, 9:48 PM PDT | Severe Thunderstorm Warning | MSO | 27 min |
| Jun 5, 4:54 PM PDT | Severe Thunderstorm Warning | MSO | 36 min |
| Jun 14, 2:35 AM PDT | Flash Flood Watch | MSO | 18 hr |
| Jun 15, 1:50 AM PDT | Flash Flood Watch | MSO | 14 hr |
| Jul 5, 4:25 PM PDT | Mesoscale Discussion | SPC | 65 min |
| Jul 26, 1:17 AM PDT | Special Weather Statement | MSO | 28 min |
| Aug 5, 9:36 PM PDT | Severe Thunderstorm Warning | MSO | 24 min |
| Sep 25, 12:47 PM PDT | Red Flag Warning | MSO | 33 hr |
| Oct 25, 2:54 AM PDT | Winter Storm Watch | MSO | 24 hr |
| Oct 26, 2:59 AM PDT | Winter Storm Warning | MSO | 32 hr |
| Oct 31, 2:35 AM PDT | Wind Advisory | MSO | 17 hr |
| Nov 5, 8:43 AM PST | Wind Advisory | MSO | 22 hr |
| Nov 11, 2:23 AM PST | Winter Weather Advisory | MSO | 32 hr |
| Nov 13, 10:19 AM PST | Winter Weather Advisory | MSO | 17 hr |
| Nov 16, 1:26 PM PST | Wind Advisory | MSO | 14 hr |
| Nov 20, 2:55 AM PST | Winter Weather Advisory | MSO | 31 hr |
| Nov 21, 3:25 AM PST | Winter Weather Advisory | MSO | 49 hr |
| Nov 22, 2:18 AM PST | Wind Advisory | MSO | 10 hr |
| Dec 11, 3:27 AM PST | Winter Storm Watch | MSO | 24 hr |
| Dec 11, 12:30 PM PST | Winter Storm Warning | MSO | 3 days |
| Dec 12, 3:06 AM PST | Winter Storm Watch | MSO | 7 hr |
| Dec 14, 1:53 PM PST | Winter Weather Advisory | MSO | 24 hr |
| Dec 22, 1:26 AM PST | Winter Weather Advisory | MSO | 8 hr |
| Dec 29, 2:36 AM PST | Winter Weather Advisory | MSO | 35 hr |
| Dec 30, 1:47 PM PST | Winter Weather Advisory | MSO | 41 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 | 4 |
| Special Weather Statement | 1 |
| Flooding | |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 13 |
| Winter Storm Watch | 9 |
| Winter Weather Advisory | 19 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 11 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.