Alert archive / Montana / Carter County
Weather alerts in Carter County, Montana, 2023
136 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Carter County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 136
- Warnings
- 23
- Watches
- 15
- Advisories
- 29
- Busiest month
- June35 alerts
- Busiest day
- June 27, 202312 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Carter County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 20 | 2 | 90% | 3 | 67% | 15 min |
| 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 Billings, MT: severe thunderstorm warnings | 85 | 22 | 74% | 85 | 48% | 22 min |
| NWS Billings, MT: flash flood warnings | 43 | 11 | 74% | 21 | 52% | 78 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 3, 12:56 AM MST | Dense Fog Advisory | BYZ | 32 hr |
| Jan 11, 1:45 AM MST | Dense Fog Advisory | BYZ | 33 hr |
| Jan 16, 12:31 AM MST | Winter Weather Advisory | BYZ | 13 hr |
| Jan 16, 2:29 PM MST | Winter Weather Advisory | BYZ | 3 min |
| Jan 16, 4:49 PM MST | Dense Fog Advisory | BYZ | 16 hr |
| Jan 24, 1:09 AM MST | Winter Weather Advisory | BYZ | 50 hr |
| Jan 26, 2:20 PM MST | Winter Weather Advisory | BYZ | 51 hr |
| Jan 28, 5:02 PM MST | Wind Chill Advisory | BYZ | 43 hr |
| Feb 8, 12:45 PM MST | Winter Weather Advisory | BYZ | 17 hr |
| Feb 13, 2:39 AM MST | Winter Weather Advisory | BYZ | 44 hr |
| Feb 19, 2:44 AM MST | Winter Storm Watch | BYZ | 24 hr |
| Feb 19, 2:44 AM MST | Winter Storm Warning | BYZ | 4 days |
| Feb 22, 2:30 AM MST | Winter Weather Advisory | BYZ | 23 hr |
| Feb 22, 1:29 PM MST | Wind Chill Advisory | BYZ | 46 hr |
| Feb 27, 1:14 PM MST | Winter Weather Advisory | BYZ | 32 hr |
| Mar 4, 1:13 AM MST | Winter Weather Advisory | BYZ | 3 days |
| Mar 7, 1:36 PM MST | Winter Storm Watch | BYZ | 11 hr |
| Mar 8, 1:03 AM MST | Winter Weather Advisory | BYZ | 38 hr |
| Mar 10, 2:08 AM MST | Winter Weather Advisory | BYZ | 24 hr |
| Mar 11, 9:58 AM MST | Special Weather Statement | BYZ | 3 hr |
| Mar 11, 12:27 PM MST | Winter Weather Advisory | BYZ | 8 hr |
| Mar 20, 5:52 AM MDT | Dense Fog Advisory | BYZ | 4 hr |
| Mar 20, 2:46 PM MDT | Winter Weather Advisory | BYZ | 27 hr |
| Mar 30, 2:16 AM MDT | Winter Weather Advisory | BYZ | 35 hr |
| Apr 1, 1:30 PM MDT | Winter Storm Watch | BYZ | 37 hr |
| Apr 2, 2:48 PM MDT | Winter Storm Warning | BYZ | 51 hr |
| Apr 3, 2:37 AM MDT | Winter Weather Advisory | BYZ | 49 hr |
| Apr 18, 5:50 AM MDT | Winter Weather Advisory | BYZ | 63 hr |
| May 6, 1:14 PM MDT | Special Weather Statement | BYZ | 31 min |
| May 7, 1:52 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| May 7, 2:30 PM MDT | Special Weather Statement | BYZ | 30 min |
| May 7, 3:09 PM MDT | Special Weather Statement | BYZ | 36 min |
| May 7, 3:42 PM MDT | Severe Thunderstorm Warning | BYZ | 33 min |
| May 7, 4:42 PM MDT | Special Weather Statement | BYZ | 33 min |
| May 7, 4:50 PM MDT | Severe Thunderstorm Warning | BYZ | 40 min |
| May 7, 5:29 PM MDT | Special Weather Statement | BYZ | 61 min |
| May 9, 1:47 AM MDT | Flood Watch | BYZ | 71 hr |
| May 10, 7:49 PM MDT | Areal Flood Advisory | BYZ | 3 hr |
| May 17, 8:50 AM MDT | Special Weather Statement | BYZ | 4 hr |
| May 22, 4:48 PM MDT | Severe Thunderstorm Warning | BYZ | 27 min |
| May 23, 5:31 PM MDT | Special Weather Statement | BYZ | 44 min |
| May 23, 6:13 PM MDT | Special Weather Statement | BYZ | 47 min |
| May 25, 2:44 AM MDT | Flood Watch | BYZ | 45 hr |
| May 25, 12:49 PM MDT | Mesoscale Discussion | SPC | 116 min |
| May 25, 3:43 PM MDT | Special Weather Statement | BYZ | 47 min |
| May 25, 4:23 PM MDT | Severe Thunderstorm Warning | BYZ | 37 min |
| May 25, 5:10 PM MDT | Areal Flood Advisory | BYZ | 4 hr |
| May 26, 2:42 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 4:09 PM MDT | Severe Thunderstorm Warning | BYZ | 66 min |
| May 26, 4:26 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 26, 5:14 PM MDT | Severe Thunderstorm Warning | BYZ | 46 min |
| May 26, 6:18 PM MDT | Mesoscale Discussion | SPC | 117 min |
| May 27, 2:01 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 27, 4:13 PM MDT | Special Weather Statement | BYZ | 32 min |
| May 27, 4:46 PM MDT | Special Weather Statement | BYZ | 29 min |
| May 27, 4:48 PM MDT | Mesoscale Discussion | SPC | 87 min |
| May 27, 5:13 PM MDT | Special Weather Statement | BYZ | 47 min |
| May 30, 3:49 PM MDT | Special Weather Statement | BYZ | 26 min |
| May 30, 4:29 PM MDT | Special Weather Statement | BYZ | 31 min |
| May 30, 4:59 PM MDT | Special Weather Statement | BYZ | 31 min |
| Jun 1, 5:54 PM MDT | Special Weather Statement | BYZ | 21 min |
| Jun 2, 1:46 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jun 9, 3:02 AM MDT | Flood Watch | BYZ | 24 hr |
| Jun 14, 6:03 PM MDT | Special Weather Statement | BYZ | 27 min |
| Jun 14, 6:49 PM MDT | Special Weather Statement | BYZ | 26 min |
| Jun 14, 8:45 PM MDT | Special Weather Statement | BYZ | 30 min |
| Jun 14, 9:20 PM MDT | Special Weather Statement | BYZ | 25 min |
| Jun 18, 6:33 PM MDT | Special Weather Statement | BYZ | 57 min |
| Jun 19, 2:51 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 12:53 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jun 20, 5:29 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jun 20, 10:26 PM MDT | Special Weather Statement | BYZ | 49 min |
| Jun 21, 1:43 PM MDT | Flood Watch | BYZ | 3 days |
| Jun 21, 11:34 PM MDT | Special Weather Statement | BYZ | 41 min |
| Jun 22, 12:08 AM MDT | Areal Flood Advisory | BYZ | 3 hr |
| Jun 23, 2:22 PM MDT | Tornado Watch | SPC | 9 hr |
| Jun 23, 4:24 PM MDT | Special Weather Statement | BYZ | 66 min |
| Jun 23, 5:18 PM MDT | Special Weather Statement | BYZ | 57 min |
| Jun 23, 5:50 PM MDT | Severe Thunderstorm Warning | BYZ | 70 min |
| Jun 23, 5:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jun 26, 3:03 AM MDT | Flood Watch | BYZ | 66 hr |
| Jun 26, 2:24 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 26, 6:36 PM MDT | Special Weather Statement | BYZ | 54 min |
| Jun 26, 7:14 PM MDT | Severe Thunderstorm Warning | BYZ | 31 min |
| Jun 26, 8:08 PM MDT | Special Weather Statement | BYZ | 22 min |
| Jun 26, 8:21 PM MDT | Severe Thunderstorm Warning | BYZ | 39 min |
| Jun 27, 1:45 PM MDT | Special Weather Statement | BYZ | 30 min |
| Jun 27, 2:09 PM MDT | Severe Thunderstorm Warning | BYZ | 51 min |
| Jun 27, 2:27 PM MDT | Special Weather Statement | BYZ | 33 min |
| Jun 27, 2:34 PM MDT | Severe Thunderstorm Warning | BYZ | 20 min |
| Jun 27, 3:04 PM MDT | Special Weather Statement | BYZ | 26 min |
| Jun 27, 3:16 PM MDT | Special Weather Statement | BYZ | 29 min |
| Jun 27, 3:30 PM MDT | Areal Flood Advisory | BYZ | 3 hr |
| Jun 27, 3:33 PM MDT | Special Weather Statement | BYZ | 42 min |
| Jun 28, 11:17 PM MDT | Special Weather Statement | BYZ | 43 min |
| Jul 3, 3:03 PM MDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jul 3, 8:22 PM MDT | Special Weather Statement | BYZ | 23 min |
| Jul 3, 8:47 PM MDT | Special Weather Statement | BYZ | 43 min |
| Jul 3, 9:34 PM MDT | Special Weather Statement | BYZ | 26 min |
| Jul 6, 4:55 PM MDT | Special Weather Statement | BYZ | 35 min |
| Jul 6, 5:51 PM MDT | Special Weather Statement | BYZ | 39 min |
| Jul 11, 1:04 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jul 11, 1:56 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 6:27 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Jul 11, 7:49 PM MDT | Severe Thunderstorm Warning | BYZ | 26 min |
| Jul 11, 7:58 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Jul 11, 8:14 PM MDT | Severe Thunderstorm Warning | BYZ | 31 min |
| Jul 11, 8:15 PM MDT | Severe Thunderstorm Warning | BYZ | 45 min |
| Jul 11, 9:19 PM MDT | Special Weather Statement | BYZ | 41 min |
| Jul 11, 9:44 PM MDT | Severe Thunderstorm Warning | BYZ | 20 min |
| Jul 17, 4:48 PM MDT | Mesoscale Discussion | SPC | 57 min |
| Jul 21, 12:19 PM MDT | Heat Advisory | BYZ | 4 days |
| Jul 30, 3:42 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Jul 30, 5:17 PM MDT | Special Weather Statement | BYZ | 28 min |
| Jul 30, 6:40 PM MDT | Special Weather Statement | BYZ | 35 min |
| Jul 31, 7:28 PM MDT | Special Weather Statement | BYZ | 47 min |
| Jul 31, 8:04 PM MDT | Severe Thunderstorm Warning | BYZ | 41 min |
| Jul 31, 8:49 PM MDT | Special Weather Statement | BYZ | 41 min |
| Jul 31, 9:31 PM MDT | Special Weather Statement | BYZ | 29 min |
| Jul 31, 9:33 PM MDT | Special Weather Statement | BYZ | 27 min |
| Jul 31, 9:38 PM MDT | Severe Thunderstorm Warning | BYZ | 22 min |
| Jul 31, 10:04 PM MDT | Special Weather Statement | BYZ | 26 min |
| Aug 1, 5:05 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Aug 2, 1:43 PM MDT | Flood Watch | BYZ | 60 hr |
| Aug 12, 4:27 PM MDT | Special Weather Statement | BYZ | 48 min |
| Aug 17, 2:20 AM MDT | Heat Advisory | BYZ | 42 hr |
| Aug 30, 7:29 PM MDT | Special Weather Statement | BYZ | 61 min |
| Sep 4, 2:05 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 4, 2:28 PM MDT | Special Weather Statement | BYZ | 47 min |
| Sep 4, 5:29 PM MDT | Special Weather Statement | BYZ | 46 min |
| Sep 4, 5:55 PM MDT | Severe Thunderstorm Warning | BYZ | 35 min |
| Sep 4, 6:28 PM MDT | Severe Thunderstorm Warning | BYZ | 47 min |
| Sep 4, 7:16 PM MDT | Special Weather Statement | BYZ | 29 min |
| Sep 24, 5:00 AM MDT | Special Weather Statement | BYZ | 3 hr |
| Oct 24, 2:23 AM MDT | Winter Storm Warning | BYZ | 67 hr |
| Dec 7, 2:09 PM MST | Winter Weather Advisory | BYZ | 26 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 | 20 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 53 |
| Flooding | |
| Flood Watch | 6 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 17 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Wind Chill Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
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.