Alert archive / Montana / Deer Lodge County
Weather alerts in Deer Lodge County, Montana, 2021
108 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Deer Lodge County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 108
- Warnings
- 23
- Watches
- 16
- Advisories
- 48
- Busiest month
- July20 alerts
- Busiest day
- July 21, 20214 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Deer Lodge County, 2021
| 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, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Missoula, MT: severe thunderstorm warnings | 14 | 6 | 57% | 26 | 42% | 11 min |
| NWS Missoula, MT: flash flood warnings | 3 | 1 | 67% | 6 | 33% | 73 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, 1:37 PM MST | Wind Advisory | MSO | 27 hr |
| Jan 4, 11:45 AM MST | Winter Weather Advisory | MSO | 21 hr |
| Jan 11, 2:39 PM MST | High Wind Watch | MSO | 21 hr |
| Jan 12, 12:03 PM MST | High Wind Warning | MSO | 32 hr |
| Jan 15, 12:50 PM MST | Winter Weather Advisory | MSO | 10 hr |
| Jan 16, 1:14 PM MST | Winter Weather Advisory | MSO | 39 hr |
| Jan 29, 1:12 PM MST | Winter Weather Advisory | MSO | 10 hr |
| Feb 2, 9:27 AM MST | Winter Weather Advisory | MSO | 20 hr |
| Feb 4, 11:07 AM MST | Winter Weather Advisory | MSO | 26 hr |
| Feb 5, 2:59 PM MST | Winter Storm Watch | MSO | 23 hr |
| Feb 5, 2:59 PM MST | Winter Storm Warning | MSO | 50 hr |
| Feb 5, 2:59 PM MST | Winter Weather Advisory | MSO | 68 hr |
| Feb 6, 3:12 AM MST | Winter Weather Advisory | MSO | 5 hr |
| Feb 8, 7:47 AM MST | Wind Chill Advisory | MSO | 27 hr |
| Feb 10, 8:14 AM MST | Wind Chill Warning | MSO | 3 days |
| Feb 13, 10:58 AM MST | Wind Chill Advisory | MSO | 25 hr |
| Feb 14, 2:31 PM MST | Winter Weather Advisory | MSO | 3 days |
| Feb 21, 8:20 AM MST | Winter Weather Advisory | MSO | 71 hr |
| Feb 24, 11:07 AM MST | Winter Weather Advisory | MSO | 72 hr |
| Mar 7, 1:51 PM MST | Winter Weather Advisory | MSO | 45 hr |
| Mar 26, 11:59 AM MDT | Fire Weather Watch | MSO | 24 hr |
| Mar 26, 1:49 PM MDT | High Wind Watch | MSO | 24 hr |
| Mar 27, 1:58 PM MDT | High Wind Warning | MSO | 43 hr |
| Mar 28, 11:03 AM MDT | Winter Weather Advisory | MSO | 24 hr |
| Apr 4, 1:17 PM MDT | Winter Weather Advisory | MSO | 29 hr |
| Apr 7, 12:10 PM MDT | Winter Weather Advisory | MSO | 22 hr |
| Apr 9, 11:53 AM MDT | Wind Advisory | MSO | 36 hr |
| Apr 18, 11:40 AM MDT | Winter Weather Advisory | MSO | 23 hr |
| Apr 23, 3:23 AM MDT | Winter Weather Advisory | MSO | 6 hr |
| May 18, 2:37 PM MDT | Winter Weather Advisory | MSO | 67 hr |
| May 21, 8:31 PM MDT | Winter Weather Advisory | MSO | 3 hr |
| May 22, 2:13 PM MDT | Winter Weather Advisory | MSO | 22 hr |
| Jun 1, 1:55 PM MDT | Heat Advisory | MSO | 55 hr |
| Jun 3, 4:58 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 4, 1:59 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 8, 1:46 PM MDT | Special Weather Statement | TFX | 44 min |
| Jun 9, 2:13 PM MDT | Winter Weather Advisory | MSO | 29 hr |
| Jun 9, 4:43 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jun 13, 5:15 PM MDT | Special Weather Statement | MSO | 30 min |
| Jun 14, 12:00 PM MDT | Red Flag Warning | MSO | 36 hr |
| Jun 14, 2:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 1:45 PM MDT | Red Flag Warning | MSO | 30 hr |
| Jul 4, 4:24 PM MDT | Special Weather Statement | MSO | 36 min |
| Jul 4, 6:15 PM MDT | Special Weather Statement | MSO | 45 min |
| Jul 7, 2:18 PM MDT | Special Weather Statement | MSO | 42 min |
| Jul 7, 2:45 PM MDT | Severe Thunderstorm Warning | MSO | 30 min |
| Jul 8, 7:08 AM MDT | Red Flag Warning | MSO | 14 hr |
| Jul 9, 10:11 AM MDT | Fire Weather Watch | MSO | 28 hr |
| Jul 10, 2:09 PM MDT | Red Flag Warning | MSO | 31 hr |
| Jul 14, 1:08 PM MDT | Red Flag Warning | MSO | 32 hr |
| Jul 15, 5:56 PM MDT | Special Weather Statement | MSO | 49 min |
| Jul 16, 6:28 PM MDT | Special Weather Statement | MSO | 47 min |
| Jul 18, 1:04 PM MDT | Red Flag Warning | MSO | 35 hr |
| Jul 20, 1:19 PM MDT | Fire Weather Watch | MSO | 23 hr |
| Jul 20, 3:35 PM MDT | Special Weather Statement | TFX | 25 min |
| Jul 21, 12:17 PM MDT | Fire Weather Watch | MSO | 25 hr |
| Jul 21, 2:40 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jul 21, 5:04 PM MDT | Special Weather Statement | TFX | 26 min |
| Jul 21, 5:43 PM MDT | Special Weather Statement | MSO | 17 min |
| Jul 22, 1:32 PM MDT | Red Flag Warning | MSO | 31 hr |
| Jul 30, 2:07 PM MDT | Flash Flood Watch | MSO | 55 hr |
| Aug 1, 11:33 AM MDT | Flash Flood Watch | MSO | 22 hr |
| Aug 2, 10:09 AM MDT | Flash Flood Watch | MSO | 9 hr |
| Aug 2, 2:21 PM MDT | Special Weather Statement | MSO | 54 min |
| Aug 4, 1:21 PM MDT | Red Flag Warning | MSO | 35 hr |
| Aug 5, 3:45 PM MDT | Special Weather Statement | TFX | 15 min |
| Aug 5, 4:12 PM MDT | Special Weather Statement | MSO | 48 min |
| Aug 6, 2:46 PM MDT | Fire Weather Watch | MSO | 22 hr |
| Aug 7, 1:09 PM MDT | Red Flag Warning | MSO | 30 hr |
| Aug 8, 1:37 PM MDT | Special Weather Statement | MSO | 53 min |
| Sep 4, 12:51 PM MDT | Red Flag Warning | MSO | 32 hr |
| Sep 5, 10:30 AM MDT | Fire Weather Watch | MSO | 10 hr |
| Sep 5, 8:35 PM MDT | Red Flag Warning | MSO | 24 hr |
| Sep 7, 3:51 AM MDT | Fire Weather Watch | MSO | 8 hr |
| Sep 7, 12:16 PM MDT | Red Flag Warning | MSO | 32 hr |
| Sep 8, 8:50 PM MDT | Red Flag Warning | MSO | 24 hr |
| Sep 10, 6:40 PM MDT | Special Weather Statement | MSO | 50 min |
| Sep 16, 2:39 PM MDT | Red Flag Warning | MSO | 54 hr |
| Sep 17, 2:16 PM MDT | High Wind Warning | MSO | 31 hr |
| Oct 9, 1:57 PM MDT | Winter Weather Advisory | MSO | 63 hr |
| Oct 26, 10:54 AM MDT | Wind Advisory | MSO | 30 hr |
| Nov 2, 7:42 AM MDT | Winter Weather Advisory | MSO | 2 hr |
| Nov 9, 2:23 PM MST | Winter Weather Advisory | MSO | 19 hr |
| Nov 11, 6:58 AM MST | Winter Weather Advisory | MSO | 5 hr |
| Nov 11, 2:28 PM MST | Winter Weather Advisory | MSO | 20 hr |
| Nov 13, 1:30 PM MST | Wind Advisory | MSO | 29 hr |
| Nov 14, 1:12 PM MST | High Wind Watch | MSO | 13 hr |
| Nov 15, 2:15 AM MST | High Wind Warning | MSO | 30 hr |
| Nov 18, 3:06 PM MST | Winter Weather Advisory | MSO | 36 hr |
| Dec 1, 7:41 AM MST | Wind Advisory | MSO | 9 hr |
| Dec 3, 1:25 PM MST | Winter Weather Advisory | MSO | 46 hr |
| Dec 3, 1:29 PM MST | Wind Advisory | MSO | 30 hr |
| Dec 5, 3:03 PM MST | Winter Weather Advisory | MSO | 42 hr |
| Dec 10, 3:01 PM MST | Winter Weather Advisory | MSO | 65 hr |
| Dec 13, 12:30 AM MST | Winter Weather Advisory | MSO | 8 hr |
| Dec 13, 1:51 PM MST | Winter Weather Advisory | MSO | 32 hr |
| Dec 14, 7:40 AM MST | Winter Storm Warning | MSO | 14 hr |
| Dec 15, 2:40 PM MST | Winter Weather Advisory | MSO | 44 hr |
| Dec 17, 1:20 PM MST | Winter Storm Warning | MSO | 64 hr |
| Dec 18, 2:38 PM MST | Winter Storm Watch | MSO | 5 hr |
| Dec 18, 2:38 PM MST | Winter Weather Advisory | MSO | 59 hr |
| Dec 22, 1:28 PM MST | Winter Weather Advisory | MSO | 22 hr |
| Dec 23, 11:53 AM MST | Winter Weather Advisory | MSO | 47 hr |
| Dec 23, 4:52 PM MST | Special Weather Statement | MSO | 83 min |
| Dec 24, 12:32 PM MST | Winter Storm Watch | MSO | 24 hr |
| Dec 25, 12:43 PM MST | Winter Weather Advisory | MSO | 28 hr |
| Dec 28, 1:40 PM MST | Winter Weather Advisory | MSO | 21 hr |
| Dec 29, 1:25 PM MST | Winter Weather Advisory | MSO | 46 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 |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 16 |
| Flooding | |
| Flash Flood Watch | 3 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 39 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Wind Chill Warning | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 4 |
| High Wind Watch | 3 |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 14 |
| Fire Weather Watch | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.