Alert archive / Montana / Ravalli County
Weather alerts in Ravalli County, Montana, 2023
97 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 97
- Warnings
- 8
- Watches
- 8
- Advisories
- 57
- Busiest month
- January18 alerts
- Busiest day
- January 9, 20233 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, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 0 | 100% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2023
| 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 | 3 | 77% | 25 | 20% | 10 min |
| NWS Missoula, MT: flash flood warnings | 7 | 2 | 71% | 4 | 100% | 29 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 7, 9:01 AM MST | Dense Fog Advisory | MSO | 3 hr |
| Jan 7, 10:59 PM MST | Dense Fog Advisory | MSO | 5 hr |
| Jan 8, 9:24 PM MST | Winter Weather Advisory | MSO | 9 hr |
| Jan 9, 6:37 AM MST | Dense Fog Advisory | MSO | 4 hr |
| Jan 9, 1:10 PM MST | Winter Weather Advisory | MSO | 13 hr |
| Jan 10, 5:17 AM MST | Dense Fog Advisory | MSO | 7 hr |
| Jan 10, 7:56 PM MST | Dense Fog Advisory | MSO | 11 hr |
| Jan 13, 12:11 PM MST | Winter Weather Advisory | MSO | 23 hr |
| Jan 14, 5:46 AM MST | Winter Storm Warning | MSO | 5 hr |
| Jan 15, 10:02 AM MST | Dense Fog Advisory | MSO | 4 hr |
| Jan 16, 11:05 AM MST | Winter Weather Advisory | MSO | 23 hr |
| Jan 25, 11:39 AM MST | Winter Storm Watch | MSO | 24 min |
| Jan 25, 11:46 AM MST | Winter Storm Watch | MSO | 26 hr |
| Jan 26, 1:59 PM MST | Winter Storm Warning | MSO | 47 hr |
| Jan 26, 1:59 PM MST | Winter Weather Advisory | MSO | 51 hr |
| Jan 28, 10:57 AM MST | Winter Weather Advisory | MSO | 6 hr |
| Jan 28, 1:48 PM MST | Wind Chill Advisory | MSO | 20 hr |
| Jan 31, 7:09 AM MST | Winter Weather Advisory | MSO | 28 hr |
| Feb 7, 1:19 AM MST | Winter Weather Advisory | MSO | 34 hr |
| Feb 12, 12:24 PM MST | Winter Weather Advisory | MSO | 60 hr |
| Feb 18, 2:25 PM MST | Winter Storm Watch | MSO | 72 hr |
| Feb 18, 2:25 PM MST | Winter Weather Advisory | MSO | 4 days |
| Feb 19, 2:02 PM MST | Winter Storm Warning | MSO | 61 hr |
| Feb 21, 9:00 PM MST | Wind Chill Advisory | MSO | 39 hr |
| Feb 23, 12:07 PM MST | Wind Chill Advisory | MSO | 20 hr |
| Feb 26, 6:39 PM MST | Winter Weather Advisory | MSO | 9 hr |
| Mar 1, 3:54 AM MST | Winter Weather Advisory | MSO | 64 hr |
| Mar 2, 8:12 PM MST | Snow Squall Warning | MSO | 48 min |
| Mar 4, 3:22 AM MST | Winter Weather Advisory | MSO | 36 hr |
| Mar 6, 10:33 AM MST | Winter Weather Advisory | MSO | 14 hr |
| Mar 9, 12:07 PM MST | Winter Weather Advisory | MSO | 47 hr |
| Mar 13, 3:12 AM MDT | Winter Weather Advisory | MSO | 30 hr |
| Mar 14, 11:54 AM MDT | Winter Weather Advisory | MSO | 26 hr |
| Mar 15, 2:47 AM MDT | Special Weather Statement | MSO | 58 min |
| Mar 19, 2:40 PM MDT | Winter Weather Advisory | MSO | 42 hr |
| Mar 23, 10:10 AM MDT | Winter Weather Advisory | MSO | 26 hr |
| Mar 25, 3:15 AM MDT | Winter Weather Advisory | MSO | 45 hr |
| Mar 28, 1:21 PM MDT | Winter Weather Advisory | MSO | 59 hr |
| Mar 31, 1:00 PM MDT | Wind Advisory | MSO | 32 hr |
| Mar 31, 1:05 PM MDT | Winter Weather Advisory | MSO | 44 hr |
| Apr 2, 3:23 PM MDT | Winter Weather Advisory | MSO | 21 hr |
| Apr 11, 2:32 PM MDT | Winter Weather Advisory | MSO | 45 hr |
| Apr 17, 1:49 PM MDT | Winter Weather Advisory | MSO | 23 hr |
| Apr 20, 2:01 PM MDT | Winter Weather Advisory | MSO | 22 hr |
| Apr 23, 2:32 PM MDT | Winter Weather Advisory | MSO | 39 hr |
| May 3, 10:56 AM MDT | River Flood Watch | MSO | 48 hr |
| May 21, 6:17 PM MDT | Special Weather Statement | MSO | 28 min |
| Jun 6, 6:26 PM MDT | Areal Flood Advisory | MSO | 3 hr |
| Jun 7, 10:50 AM MDT | Flood Watch | MSO | 12 hr |
| Jun 7, 7:40 PM MDT | Special Weather Statement | MSO | 50 min |
| Jun 7, 8:33 PM MDT | Areal Flood Advisory | MSO | 3 hr |
| Jun 8, 3:02 AM MDT | Flood Watch | MSO | 18 hr |
| Jun 11, 4:52 PM MDT | Areal Flood Advisory | MSO | 113 min |
| Jun 12, 6:41 PM MDT | Special Weather Statement | MSO | 34 min |
| Jun 12, 7:27 PM MDT | Special Weather Statement | MSO | 48 min |
| Jul 10, 2:07 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 2:11 PM MDT | Special Weather Statement | MSO | 49 min |
| Jul 10, 2:33 PM MDT | Special Weather Statement | TFX | 27 min |
| Jul 10, 6:09 PM MDT | Special Weather Statement | MSO | 36 min |
| Jul 20, 3:14 PM MDT | Special Weather Statement | TFX | 46 min |
| Jul 20, 6:08 PM MDT | Special Weather Statement | MSO | 22 min |
| Jul 27, 6:12 PM MDT | Special Weather Statement | MSO | 33 min |
| Jul 30, 2:28 AM MDT | Red Flag Warning | MSO | 19 hr |
| Jul 31, 10:58 AM MDT | Red Flag Warning | MSO | 10 hr |
| Aug 5, 7:59 PM MDT | Special Weather Statement | MSO | 46 min |
| Aug 6, 3:52 PM MDT | Special Weather Statement | MSO | 23 min |
| Aug 13, 12:58 PM MDT | Heat Advisory | MSO | 4 days |
| Aug 18, 1:02 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Aug 22, 5:30 PM MDT | Special Weather Statement | MSO | 30 min |
| Aug 25, 2:02 PM MDT | Special Weather Statement | MSO | 43 min |
| Aug 25, 2:51 PM MDT | Special Weather Statement | MSO | 39 min |
| Aug 25, 3:33 PM MDT | Special Weather Statement | MSO | 42 min |
| Aug 25, 7:10 PM MDT | Special Weather Statement | MSO | 50 min |
| Aug 29, 2:31 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Aug 29, 2:54 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 29, 5:10 PM MDT | Severe Thunderstorm Warning | MSO | 35 min |
| Aug 29, 7:16 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Sep 20, 1:52 PM MDT | Winter Weather Advisory | MSO | 46 hr |
| Oct 23, 1:40 PM MDT | Winter Storm Watch | MSO | 21 hr |
| Oct 23, 1:40 PM MDT | Winter Storm Warning | MSO | 46 hr |
| Oct 23, 1:40 PM MDT | Winter Weather Advisory | MSO | 4 days |
| Oct 25, 4:42 PM MDT | Special Weather Statement | MSO | 48 min |
| Oct 30, 10:10 AM MDT | Air Stagnation Advisory | MSO | 62 hr |
| Nov 13, 1:15 PM MST | Winter Weather Advisory | MSO | 68 hr |
| Nov 19, 7:08 AM MST | Winter Weather Advisory | MSO | 3 hr |
| Nov 22, 6:48 AM MST | Winter Weather Advisory | MSO | 2 hr |
| Nov 27, 11:48 AM MST | Air Stagnation Advisory | MSO | 70 hr |
| Nov 30, 10:44 AM MST | Winter Weather Advisory | MSO | 63 hr |
| Dec 2, 1:09 PM MST | Winter Weather Advisory | MSO | 44 hr |
| Dec 2, 6:16 PM MST | Special Weather Statement | MSO | 44 min |
| Dec 6, 2:35 AM MST | Winter Weather Advisory | MSO | 66 hr |
| Dec 8, 2:05 PM MST | Winter Weather Advisory | MSO | 63 hr |
| Dec 14, 10:53 AM MST | Air Stagnation Advisory | MSO | 5 days |
| Dec 16, 6:02 AM MST | Dense Fog Advisory | MSO | 118 min |
| Dec 16, 8:40 AM MST | Dense Fog Advisory | MSO | 3 hr |
| Dec 22, 6:49 AM MST | Dense Fog Advisory | MSO | 5 hr |
| Dec 22, 11:43 AM MST | Winter Weather Advisory | MSO | 23 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 | 1 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 20 |
| Flooding | |
| Flood Watch | 2 |
| River Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Snow Squall Warning | 1 |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 37 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 2 |
| Fog and smoke | |
| Air Stagnation Advisory | 3 |
| Dense Fog Advisory | 9 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.