Alert archive / Montana / Carbon County
Weather alerts in Carbon County, Montana, 2015
76 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Carbon County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 76
- Warnings
- 21
- Watches
- 16
- Advisories
- 11
- Busiest month
- June20 alerts
- Busiest day
- June 1, 20155 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Carbon County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 1 | 50% | 3 | 67% | 13 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Billings, MT: tornado warnings | 3 | 0 | 100% | 0 | ||
| NWS Billings, MT: severe thunderstorm warnings | 91 | 58 | 36% | 169 | 71% | 23 min |
| NWS Billings, MT: flash flood warnings | 11 | 5 | 55% | 30 | 57% | 50 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, 4:12 AM MST | Winter Weather Advisory | BYZ | 31 hr |
| Jan 3, 2:57 PM MST | Winter Storm Watch | BYZ | 13 hr |
| Jan 3, 2:57 PM MST | Winter Weather Advisory | BYZ | 4 days |
| Jan 4, 4:21 AM MST | Winter Storm Warning | BYZ | 71 hr |
| Jan 7, 5:33 PM MST | Winter Weather Advisory | BYZ | 6 hr |
| Jan 10, 3:11 PM MST | Winter Weather Advisory | BYZ | 24 hr |
| Feb 6, 3:40 AM MST | High Wind Warning | BYZ | 40 hr |
| Feb 15, 3:42 AM MST | Winter Weather Advisory | BYZ | 56 hr |
| Feb 19, 3:25 AM MST | Winter Storm Watch | BYZ | 11 hr |
| Feb 19, 2:41 PM MST | Winter Storm Warning | BYZ | 49 hr |
| Feb 24, 2:49 PM MST | Winter Weather Advisory | BYZ | 30 hr |
| Mar 1, 4:02 AM MST | Winter Storm Watch | BYZ | 24 hr |
| Mar 2, 3:43 AM MST | Winter Storm Warning | BYZ | 32 hr |
| Mar 13, 2:25 PM MDT | Red Flag Warning | BYZ | 30 hr |
| Mar 24, 3:41 AM MDT | Winter Storm Warning | BYZ | 24 hr |
| Mar 27, 3:17 AM MDT | Fire Weather Watch | BYZ | 9 hr |
| Mar 27, 12:45 PM MDT | Red Flag Warning | BYZ | 32 hr |
| Mar 30, 3:42 AM MDT | Fire Weather Watch | BYZ | 9 hr |
| Mar 30, 12:30 PM MDT | Red Flag Warning | BYZ | 56 hr |
| Apr 11, 4:03 AM MDT | Red Flag Warning | BYZ | 40 hr |
| Apr 13, 4:01 AM MDT | Fire Weather Watch | BYZ | 10 hr |
| Apr 13, 2:20 PM MDT | Red Flag Warning | BYZ | 31 hr |
| Apr 14, 4:20 AM MDT | Winter Weather Advisory | BYZ | 50 hr |
| May 8, 3:11 PM MDT | Winter Weather Advisory | BYZ | 42 hr |
| May 15, 3:07 PM MDT | Winter Storm Warning | BYZ | 35 hr |
| May 15, 5:36 PM MDT | Special Weather Statement | RIW | 39 min |
| May 30, 2:00 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 31, 4:23 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jun 1, 1:46 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jun 1, 2:19 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 1, 4:31 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Jun 1, 4:53 PM MDT | Special Weather Statement | BYZ | 67 min |
| Jun 1, 5:07 PM MDT | Severe Thunderstorm Warning | BYZ | 23 min |
| Jun 1, 6:45 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jun 4, 8:42 PM MDT | Special Weather Statement | BYZ | 63 min |
| Jun 5, 3:31 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 5, 4:02 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 5, 6:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 4:17 PM MDT | Special Weather Statement | RIW | 28 min |
| Jun 10, 4:42 PM MDT | Special Weather Statement | BYZ | 63 min |
| Jun 10, 9:44 PM MDT | Areal Flood Advisory | BYZ | 12 hr |
| Jun 16, 5:02 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jun 16, 5:03 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| Jun 17, 2:32 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jun 18, 3:57 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 18, 8:10 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jun 19, 2:04 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jun 19, 2:51 PM MDT | Tornado Watch | SPC | 7 hr |
| Jul 16, 7:09 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jul 27, 1:44 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 27, 2:58 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 4, 4:13 PM MDT | Special Weather Statement | BYZ | 47 min |
| Aug 12, 9:57 PM MDT | Special Weather Statement | BYZ | 63 min |
| Aug 12, 11:25 PM MDT | Special Weather Statement | RIW | 65 min |
| Aug 17, 1:10 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 17, 2:47 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 17, 3:44 PM MDT | Special Weather Statement | BYZ | 61 min |
| Aug 28, 3:27 AM MDT | Fire Weather Watch | BYZ | 11 hr |
| Aug 28, 2:56 PM MDT | Red Flag Warning | BYZ | 56 hr |
| Sep 1, 3:10 AM MDT | Red Flag Warning | BYZ | 42 hr |
| Sep 13, 5:23 PM MDT | Special Weather Statement | BYZ | 37 min |
| Sep 13, 6:04 PM MDT | Special Weather Statement | BYZ | 41 min |
| Sep 13, 6:50 PM MDT | Special Weather Statement | BYZ | 55 min |
| Oct 11, 3:14 AM MDT | Red Flag Warning | BYZ | 17 hr |
| Nov 2, 1:19 PM MST | Winter Storm Warning | BYZ | 38 hr |
| Nov 16, 3:53 AM MST | High Wind Watch | BYZ | 24 hr |
| Nov 17, 3:39 AM MST | High Wind Warning | BYZ | 39 hr |
| Nov 19, 4:58 AM MST | Winter Weather Advisory | BYZ | 34 hr |
| Nov 23, 3:27 AM MST | Winter Storm Watch | BYZ | 12 hr |
| Nov 23, 2:57 PM MST | Winter Storm Warning | BYZ | 57 hr |
| Dec 8, 11:14 PM MST | High Wind Warning | BYZ | 19 hr |
| Dec 9, 4:03 AM MST | High Wind Watch | BYZ | 8 hr |
| Dec 9, 3:46 PM MST | Special Weather Statement | BYZ | 119 min |
| Dec 12, 2:06 PM MST | Winter Storm Watch | BYZ | 49 hr |
| Dec 13, 1:49 PM MST | Winter Storm Warning | BYZ | 56 hr |
| Dec 16, 3:12 AM MST | Winter Weather Advisory | BYZ | 21 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 | 2 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 13 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 8 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 10 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 2 |
| Fire | |
| Red Flag Warning | 8 |
| Fire Weather Watch | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.