Alert archive / Montana / Ravalli County
Weather alerts in Ravalli County, Montana, 2017
134 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Ravalli County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 134
- Warnings
- 26
- Watches
- 10
- Advisories
- 66
- Busiest month
- January17 alerts
- Busiest day
- July 15, 20178 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Ravalli County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 3 | 0% | 3 | 100% | 26 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: tornado warnings | 0 | 1 | 0% | |||
| NWS Missoula, MT: severe thunderstorm warnings | 13 | 8 | 38% | 24 | 38% | 20 min |
| NWS Missoula, MT: flash flood warnings | 0 | 1 | 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 1, 4:57 AM MST | Winter Storm Warning | MSO | 14 hr |
| Jan 2, 3:41 AM MST | Wind Chill Advisory | MSO | 31 hr |
| Jan 7, 2:35 PM MST | Winter Storm Watch | MSO | 59 days |
| Jan 7, 2:35 PM MST | Winter Weather Advisory | MSO | 50 hr |
| Jan 7, 11:27 PM MST | Winter Storm Warning | MSO | 42 hr |
| Jan 8, 3:35 AM MST | Winter Weather Advisory | MSO | 37 hr |
| Jan 10, 1:31 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Jan 17, 1:42 PM MST | Winter Weather Advisory | MSO | 45 hr |
| Jan 18, 9:09 PM MST | Freezing Rain Advisory | MSO | 14 hr |
| Jan 19, 11:24 PM MST | Dense Fog Advisory | MSO | 12 hr |
| Jan 20, 9:45 PM MST | Freezing Fog Advisory | MSO | 11 hr |
| Jan 21, 1:59 PM MST | Winter Weather Advisory | MSO | 43 hr |
| Jan 23, 5:51 AM MST | Dense Fog Advisory | MSO | 5 hr |
| Jan 29, 2:29 PM MST | Winter Storm Watch | MSO | 39 days |
| Jan 30, 12:07 PM MST | Winter Storm Warning | MSO | 40 hr |
| Jan 30, 12:07 PM MST | Winter Weather Advisory | MSO | 40 hr |
| Jan 31, 6:04 AM MST | Winter Weather Advisory | MSO | 29 hr |
| Feb 1, 2:36 PM MST | Winter Weather Advisory | MSO | 23 hr |
| Feb 2, 1:54 PM MST | Winter Weather Advisory | MSO | 69 hr |
| Feb 3, 8:25 PM MST | Winter Storm Warning | MSO | 21 hr |
| Feb 6, 11:09 AM MST | Winter Weather Advisory | MSO | 21 hr |
| Feb 7, 9:24 AM MST | Winter Weather Advisory | MSO | 24 hr |
| Feb 7, 2:07 PM MST | Areal Flood Advisory | MSO | 4 days |
| Feb 8, 11:42 AM MST | Winter Storm Warning | MSO | 32 hr |
| Feb 8, 11:42 AM MST | Winter Weather Advisory | MSO | 23 hr |
| Feb 14, 2:06 PM MST | Areal Flood Advisory | MSO | 3 days |
| Feb 21, 3:39 AM MST | Winter Weather Advisory | MSO | 31 hr |
| Feb 23, 5:10 AM MST | Winter Weather Advisory | MSO | 4 hr |
| Feb 25, 1:58 PM MST | Winter Weather Advisory | MSO | 46 hr |
| Feb 27, 2:39 PM MST | Winter Weather Advisory | MSO | 23 hr |
| Feb 28, 2:14 PM MST | Wind Advisory | MSO | 30 hr |
| Feb 28, 2:17 PM MST | Winter Weather Advisory | MSO | 46 hr |
| Mar 3, 2:09 PM MST | Winter Weather Advisory | MSO | 20 hr |
| Mar 4, 1:37 PM MST | Winter Weather Advisory | MSO | 30 hr |
| Mar 6, 2:54 PM MST | Winter Weather Advisory | MSO | 19 hr |
| Mar 7, 2:42 PM MST | Winter Storm Warning | MSO | 20 hr |
| Mar 8, 2:04 PM MST | Winter Weather Advisory | MSO | 23 hr |
| Mar 9, 7:54 AM MST | Winter Storm Warning | MSO | 5 hr |
| Mar 9, 3:06 PM MST | Winter Weather Advisory | MSO | 23 hr |
| Mar 17, 1:35 PM MDT | Areal Flood Advisory | MSO | 58 hr |
| Mar 27, 9:25 AM MDT | Winter Weather Advisory | MSO | 3 hr |
| Apr 7, 9:35 PM MDT | Winter Weather Advisory | MSO | 38 hr |
| Apr 13, 2:43 PM MDT | Winter Weather Advisory | MSO | 33 hr |
| May 5, 5:06 PM MDT | Special Weather Statement | MSO | 39 min |
| May 5, 5:14 PM MDT | Special Weather Statement | MSO | 46 min |
| May 6, 12:55 PM MDT | Special Weather Statement | MSO | 50 min |
| May 6, 1:26 PM MDT | Severe Thunderstorm Warning | MSO | 34 min |
| May 15, 12:54 PM MDT | Winter Storm Watch | MSO | 24 hr |
| May 16, 3:57 AM MDT | Winter Weather Advisory | MSO | 47 hr |
| May 16, 1:14 PM MDT | Winter Storm Warning | MSO | 38 hr |
| May 23, 9:54 AM MDT | Wind Advisory | MSO | 35 hr |
| Jun 1, 9:57 AM MDT | Areal Flood Advisory | MSO | 10 hr |
| Jun 1, 1:12 PM MDT | Special Weather Statement | MSO | 33 min |
| Jun 1, 1:40 PM MDT | Special Weather Statement | MSO | 35 min |
| Jun 1, 2:11 PM MDT | Special Weather Statement | MSO | 34 min |
| Jun 4, 3:28 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 7, 5:48 PM MDT | Special Weather Statement | MSO | 72 min |
| Jun 8, 3:13 PM MDT | Special Weather Statement | MSO | 47 min |
| Jun 10, 2:03 PM MDT | Flood Watch | MSO | 3 days |
| Jun 12, 5:50 PM MDT | Special Weather Statement | MSO | 40 min |
| Jun 12, 10:08 PM MDT | Areal Flood Advisory | MSO | 24 hr |
| Jun 13, 10:09 AM MDT | Areal Flood Warning | MSO | 12 hr |
| Jun 13, 7:54 PM MDT | Flood Watch | MSO | 10 hr |
| Jun 26, 6:33 PM MDT | Special Weather Statement | MSO | 27 min |
| Jun 26, 6:44 PM MDT | Special Weather Statement | MSO | 46 min |
| Jun 26, 8:30 PM MDT | Special Weather Statement | MSO | 45 min |
| Jun 26, 9:14 PM MDT | Special Weather Statement | MSO | 31 min |
| Jul 5, 1:41 PM MDT | Heat Advisory | MSO | 3 days |
| Jul 9, 4:46 PM MDT | Special Weather Statement | MSO | 44 min |
| Jul 9, 5:31 PM MDT | Special Weather Statement | MSO | 44 min |
| Jul 9, 7:06 PM MDT | Special Weather Statement | MSO | 39 min |
| Jul 9, 7:46 PM MDT | Special Weather Statement | MSO | 44 min |
| Jul 9, 10:17 PM MDT | Special Weather Statement | MSO | 43 min |
| Jul 10, 5:04 PM MDT | Special Weather Statement | MSO | 26 min |
| Jul 15, 2:00 PM MDT | Red Flag Warning | MSO | 31 hr |
| Jul 15, 2:07 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jul 15, 2:58 PM MDT | Special Weather Statement | MSO | 62 min |
| Jul 15, 3:35 PM MDT | Special Weather Statement | MSO | 40 min |
| Jul 15, 4:03 PM MDT | Special Weather Statement | MSO | 27 min |
| Jul 15, 4:16 PM MDT | Special Weather Statement | MSO | 59 min |
| Jul 15, 4:27 PM MDT | Severe Thunderstorm Warning | MSO | 33 min |
| Jul 15, 4:59 PM MDT | Severe Thunderstorm Warning | MSO | 46 min |
| Aug 11, 1:03 PM MDT | Red Flag Warning | MSO | 56 hr |
| Aug 12, 9:52 PM MDT | Special Weather Statement | MSO | 38 min |
| Aug 17, 11:56 AM MDT | Red Flag Warning | MSO | 57 hr |
| Aug 18, 2:03 PM MDT | Red Flag Warning | MSO | 31 hr |
| Aug 24, 8:59 AM MDT | Red Flag Warning | MSO | 14 hr |
| Aug 24, 2:14 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 24, 6:04 PM MDT | Special Weather Statement | MSO | 41 min |
| Aug 29, 12:49 PM MDT | Red Flag Warning | MSO | 56 hr |
| Aug 30, 2:16 PM MDT | Special Weather Statement | MSO | 29 min |
| Aug 30, 8:02 PM MDT | Special Weather Statement | MSO | 43 min |
| Aug 30, 8:56 PM MDT | Special Weather Statement | MSO | 34 min |
| Aug 30, 9:41 PM MDT | Special Weather Statement | MSO | 34 min |
| Sep 1, 2:34 PM MDT | Fire Weather Watch | MSO | 23 hr |
| Sep 2, 1:45 PM MDT | Red Flag Warning | MSO | 45 hr |
| Sep 7, 1:48 PM MDT | Fire Weather Watch | MSO | 22 hr |
| Sep 8, 11:57 AM MDT | Red Flag Warning | MSO | 33 hr |
| Sep 12, 2:02 PM MDT | Red Flag Warning | MSO | 29 hr |
| Sep 12, 2:03 PM MDT | Winter Storm Watch | MSO | 43 hr |
| Sep 14, 9:29 AM MDT | Winter Storm Warning | MSO | 45 hr |
| Sep 19, 10:55 PM MDT | Winter Weather Advisory | MSO | 13 hr |
| Sep 21, 3:33 AM MDT | Winter Weather Advisory | MSO | 44 hr |
| Sep 23, 1:29 PM MDT | Freeze Warning | MSO | 20 hr |
| Sep 30, 2:07 PM MDT | Winter Weather Advisory | MSO | 29 hr |
| Oct 6, 11:31 AM MDT | Wind Advisory | MSO | 30 hr |
| Oct 11, 2:38 PM MDT | Winter Weather Advisory | MSO | 18 hr |
| Oct 12, 1:11 PM MDT | Winter Weather Advisory | MSO | 30 hr |
| Oct 16, 2:37 PM MDT | Wind Advisory | MSO | 33 hr |
| Oct 17, 4:10 PM MDT | High Wind Warning | MSO | 8 hr |
| Oct 25, 7:14 AM MDT | Dense Fog Advisory | MSO | 106 min |
| Oct 31, 2:38 PM MDT | Winter Weather Advisory | MSO | 4 days |
| Nov 4, 2:35 PM MDT | Winter Weather Advisory | MSO | 45 hr |
| Nov 10, 3:04 AM MST | Dense Fog Advisory | MSO | 8 hr |
| Nov 13, 5:04 AM MST | Dense Fog Advisory | MSO | 5 hr |
| Nov 16, 2:32 PM MST | Winter Weather Advisory | MSO | 24 hr |
| Nov 21, 4:45 AM MST | Dense Fog Advisory | MSO | 6 hr |
| Nov 21, 1:14 PM MST | High Wind Watch | MSO | 38 hr |
| Nov 22, 10:46 PM MST | Dense Fog Advisory | MSO | 5 hr |
| Nov 23, 3:27 AM MST | Wind Advisory | MSO | 25 hr |
| Nov 23, 4:02 AM MST | Dense Fog Advisory | MSO | 5 hr |
| Nov 24, 1:12 AM MST | Areal Flood Advisory | MSO | 12 hr |
| Nov 28, 10:48 AM MST | Winter Weather Advisory | MSO | 21 hr |
| Dec 2, 3:26 AM MST | Winter Weather Advisory | MSO | 44 hr |
| Dec 12, 4:32 AM MST | Dense Fog Advisory | MSO | 5 hr |
| Dec 13, 6:15 AM MST | Winter Weather Advisory | MSO | 14 hr |
| Dec 14, 2:27 PM MST | Winter Weather Advisory | MSO | 45 hr |
| Dec 16, 2:45 PM MST | Winter Weather Advisory | MSO | 44 hr |
| Dec 19, 4:45 AM MST | Winter Weather Advisory | MSO | 39 hr |
| Dec 21, 4:03 AM MST | Winter Weather Advisory | MSO | 53 hr |
| Dec 22, 3:50 PM MST | Winter Storm Warning | MSO | 7 hr |
| Dec 24, 3:31 AM MST | Winter Weather Advisory | MSO | 43 hr |
| Dec 27, 4:40 AM MST | Winter Storm Watch | MSO | 23 hr |
| Dec 27, 3:02 PM MST | Winter Storm Warning | MSO | 3 days |
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 |
| Mesoscale Discussion | 3 |
| Special Weather Statement | 29 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Warning | 11 |
| Winter Storm Watch | 5 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 42 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 9 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 9 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.