Alert archive / Montana / Carbon County
Weather alerts in Carbon County, Montana, 2016
70 weather alerts in 2016, 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 2016. Tap one for its archive.
- Alerts
- 70
- Warnings
- 19
- Watches
- 9
- Advisories
- 10
- Busiest month
- December15 alerts
- Busiest day
- May 21, 20166 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, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 6 | 3 | 50% | 3 | 100% | 12 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Billings, MT: tornado warnings | 4 | 0 | 100% | 4 | 0% | |
| NWS Billings, MT: severe thunderstorm warnings | 97 | 42 | 57% | 164 | 68% | 22 min |
| NWS Billings, MT: flash flood warnings | 2 | 0 | 100% | 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 |
|---|---|---|---|
| Feb 5, 4:23 AM MST | High Wind Watch | BYZ | 34 hr |
| Feb 5, 8:40 PM MST | High Wind Warning | BYZ | 46 hr |
| Feb 17, 3:41 PM MST | High Wind Watch | BYZ | 12 hr |
| Feb 18, 3:43 AM MST | High Wind Warning | BYZ | 37 hr |
| Mar 13, 2:20 PM MDT | Winter Storm Warning | BYZ | 28 hr |
| Mar 16, 3:11 PM MDT | Winter Weather Advisory | BYZ | 30 hr |
| Mar 22, 3:29 AM MDT | Winter Weather Advisory | BYZ | 27 hr |
| Mar 25, 7:33 AM MDT | Special Weather Statement | BYZ | 3 hr |
| Mar 27, 5:23 AM MDT | Winter Storm Watch | BYZ | 48 hr |
| Mar 27, 4:05 PM MDT | Winter Storm Warning | BYZ | 61 hr |
| Mar 30, 2:49 PM MDT | Winter Storm Warning | BYZ | 15 hr |
| Apr 6, 6:17 PM MDT | Special Weather Statement | BYZ | 118 min |
| Apr 18, 1:29 AM MDT | Winter Weather Advisory | BYZ | 34 hr |
| Apr 23, 5:00 PM MDT | Special Weather Statement | RIW | 45 min |
| May 9, 2:40 PM MDT | Winter Weather Advisory | BYZ | 20 hr |
| May 20, 8:14 PM MDT | Special Weather Statement | BYZ | 61 min |
| May 20, 8:57 PM MDT | Severe Thunderstorm Warning | BYZ | 33 min |
| May 21, 1:42 PM MDT | Special Weather Statement | BYZ | 63 min |
| May 21, 2:01 PM MDT | Severe Thunderstorm Warning | BYZ | 59 min |
| May 21, 2:10 PM MDT | Mesoscale Discussion | SPC | 65 min |
| May 21, 2:40 PM MDT | Severe Thunderstorm Warning | BYZ | 65 min |
| May 27, 5:16 PM MDT | Special Weather Statement | BYZ | 29 min |
| May 30, 5:35 PM MDT | Special Weather Statement | BYZ | 40 min |
| Jun 28, 7:55 PM MDT | Special Weather Statement | RIW | 50 min |
| Jun 28, 8:19 PM MDT | Special Weather Statement | BYZ | 56 min |
| Jun 29, 2:06 PM MDT | Special Weather Statement | RIW | 39 min |
| Jun 29, 3:02 PM MDT | Special Weather Statement | RIW | 43 min |
| Jun 29, 3:05 PM MDT | Special Weather Statement | BYZ | 40 min |
| Jul 9, 11:45 PM MDT | Special Weather Statement | BYZ | 45 min |
| Jul 10, 12:35 AM MDT | Special Weather Statement | BYZ | 40 min |
| Jul 15, 7:35 PM MDT | Severe Thunderstorm Warning | BYZ | 40 min |
| Jul 15, 8:15 PM MDT | Severe Thunderstorm Warning | BYZ | 60 min |
| Jul 16, 12:23 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 7:51 PM MDT | Special Weather Statement | BYZ | 39 min |
| Jul 27, 4:15 PM MDT | Severe Thunderstorm Warning | BYZ | 37 min |
| Jul 31, 6:53 PM MDT | Special Weather Statement | RIW | 82 min |
| Aug 1, 2:28 PM MDT | Fire Weather Watch | BYZ | 13 hr |
| Aug 2, 3:15 AM MDT | Red Flag Warning | BYZ | 42 hr |
| Aug 6, 2:37 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 11:39 AM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 31, 2:51 PM MDT | Fire Weather Watch | BYZ | 21 hr |
| Sep 1, 11:26 AM MDT | Red Flag Warning | BYZ | 34 hr |
| Sep 1, 2:22 PM MDT | Special Weather Statement | BYZ | 23 min |
| Sep 1, 3:03 PM MDT | Special Weather Statement | BYZ | 27 min |
| Sep 1, 6:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Sep 22, 2:47 AM MDT | Special Weather Statement | BYZ | 3 hr |
| Sep 30, 6:37 PM MDT | Special Weather Statement | BYZ | 23 min |
| Oct 2, 2:51 AM MDT | Winter Storm Watch | BYZ | 24 hr |
| Oct 3, 2:40 AM MDT | Winter Storm Warning | BYZ | 33 hr |
| Oct 7, 8:26 AM MDT | Special Weather Statement | BYZ | 94 min |
| Oct 10, 4:16 AM MDT | Winter Weather Advisory | BYZ | 40 hr |
| Oct 14, 3:00 PM MDT | Special Weather Statement | BYZ | 2 hr |
| Oct 16, 5:55 AM MDT | Special Weather Statement | BYZ | 65 min |
| Nov 15, 1:52 PM MST | Winter Storm Watch | BYZ | 14 hr |
| Nov 16, 4:11 AM MST | Winter Storm Warning | BYZ | 40 hr |
| Dec 3, 3:17 AM MST | Winter Storm Watch | BYZ | 15 hr |
| Dec 3, 6:07 PM MST | Winter Storm Warning | BYZ | 39 hr |
| Dec 4, 4:11 AM MST | Winter Weather Advisory | BYZ | 34 hr |
| Dec 5, 11:19 PM MST | Special Weather Statement | BYZ | 4 hr |
| Dec 9, 9:45 AM MST | Winter Weather Advisory | BYZ | 32 hr |
| Dec 9, 4:45 PM MST | Winter Storm Warning | BYZ | 25 hr |
| Dec 11, 2:48 PM MST | Winter Weather Advisory | BYZ | 24 hr |
| Dec 13, 3:21 PM MST | Winter Storm Watch | BYZ | 23 hr |
| Dec 14, 4:59 AM MST | Winter Storm Warning | BYZ | 71 hr |
| Dec 16, 2:59 PM MST | Wind Chill Warning | BYZ | 20 hr |
| Dec 20, 7:45 PM MST | Special Weather Statement | BYZ | 30 min |
| Dec 20, 8:17 PM MST | Special Weather Statement | BYZ | 43 min |
| Dec 23, 11:42 AM MST | Winter Weather Advisory | BYZ | 67 hr |
| Dec 29, 3:02 PM MST | Winter Weather Advisory | BYZ | 30 hr |
| Dec 30, 1:27 PM MST | Special Weather Statement | BYZ | 4 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 | 6 |
| Mesoscale Discussion | 5 |
| Special Weather Statement | 27 |
| Winter | |
| Winter Storm Warning | 8 |
| Winter Storm Watch | 5 |
| Winter Weather Advisory | 10 |
| Cold | |
| Wind Chill Warning | 1 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20152017
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.