Alert archive / Montana / Rosebud County
Weather alerts in Rosebud County, Montana, 2015
93 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Rosebud County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 93
- Warnings
- 34
- Watches
- 17
- Advisories
- 9
- Busiest month
- June32 alerts
- Busiest day
- June 19, 20157 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Rosebud County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 18 | 16 | 11% | 17 | 71% | 19 min |
| Flash flood warnings | 1 | 0 | 100% | 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 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, 2:22 PM MST | Winter Weather Advisory | BYZ | 29 hr |
| Jan 8, 7:35 PM MST | Wind Chill Advisory | BYZ | 15 hr |
| Jan 18, 9:01 AM MST | Freezing Rain Advisory | BYZ | 3 hr |
| Feb 11, 7:31 AM MST | Dense Fog Advisory | BYZ | 3 hr |
| Feb 15, 3:42 AM MST | Winter Weather Advisory | BYZ | 56 hr |
| Mar 2, 3:43 AM MST | Winter Weather Advisory | BYZ | 30 hr |
| Mar 13, 2:25 PM MDT | Red Flag Warning | BYZ | 30 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 28, 3:09 AM MDT | High Wind Warning | BYZ | 19 hr |
| Mar 28, 12:57 PM MDT | Mesoscale Discussion | SPC | 48 min |
| 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 29, 10:30 PM MDT | Special Weather Statement | BYZ | 60 min |
| May 26, 2:42 PM MDT | River Flood Watch | BYZ | 3 days |
| May 27, 5:27 AM MDT | River Flood Warning | BYZ | 3 days |
| May 30, 10:15 AM MDT | River Flood Warning | BYZ | 10 days |
| May 30, 2:00 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 1, 8:28 PM MDT | Special Weather Statement | BYZ | 62 min |
| Jun 1, 9:27 PM MDT | Special Weather Statement | BYZ | 63 min |
| Jun 2, 5:33 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| Jun 5, 9:15 AM MDT | Flash Flood Watch | BYZ | 21 hr |
| 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 5, 8:42 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Jun 5, 9:31 PM MDT | Special Weather Statement | BYZ | 59 min |
| Jun 5, 9:49 PM MDT | Flash Flood Warning | BYZ | 6 hr |
| Jun 10, 2:33 AM MDT | Flash Flood Watch | BYZ | 21 hr |
| Jun 17, 4:40 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 17, 4:57 PM MDT | Special Weather Statement | BYZ | 48 min |
| Jun 17, 5:36 PM MDT | Severe Thunderstorm Warning | BYZ | 54 min |
| Jun 17, 6:27 PM MDT | Special Weather Statement | BYZ | 63 min |
| Jun 18, 8:10 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jun 18, 10:20 PM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| Jun 18, 11:10 PM MDT | Severe Thunderstorm Warning | BYZ | 65 min |
| Jun 19, 2:04 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jun 19, 2:51 PM MDT | Severe Thunderstorm Warning | BYZ | 54 min |
| Jun 19, 2:51 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 19, 3:13 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Jun 19, 6:01 PM MDT | Severe Thunderstorm Warning | BYZ | 44 min |
| Jun 19, 6:44 PM MDT | Severe Thunderstorm Warning | BYZ | 21 min |
| Jun 21, 1:28 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 7:15 PM MDT | Special Weather Statement | BYZ | 60 min |
| Jun 21, 7:36 PM MDT | Severe Thunderstorm Warning | BYZ | 54 min |
| Jun 21, 8:19 PM MDT | Special Weather Statement | BYZ | 41 min |
| Jun 23, 1:05 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jun 24, 3:53 AM MDT | Special Weather Statement | BYZ | 67 min |
| Jun 24, 4:09 AM MDT | Severe Thunderstorm Warning | BYZ | 51 min |
| Jun 24, 4:57 AM MDT | Severe Thunderstorm Warning | BYZ | 63 min |
| Jul 1, 1:43 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 1, 5:10 PM MDT | Severe Thunderstorm Warning | BYZ | 65 min |
| Jul 1, 6:15 PM MDT | Severe Thunderstorm Warning | BYZ | 60 min |
| Jul 1, 6:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 1, 6:51 PM MDT | Severe Thunderstorm Warning | BYZ | 39 min |
| Jul 10, 5:13 PM MDT | Special Weather Statement | BYZ | 47 min |
| Jul 14, 5:58 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Jul 16, 7:09 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jul 25, 2:46 PM MDT | Fire Weather Watch | BYZ | 24 hr |
| Jul 26, 2:42 PM MDT | Red Flag Warning | BYZ | 31 hr |
| Jul 27, 4:04 AM MDT | High Wind Watch | BYZ | 10 hr |
| Jul 27, 1:44 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 27, 2:12 PM MDT | High Wind Warning | BYZ | 30 hr |
| Jul 27, 2:58 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 27, 5:32 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 27, 6:14 PM MDT | Special Weather Statement | BYZ | 31 min |
| Jul 27, 6:36 PM MDT | Special Weather Statement | BYZ | 54 min |
| Jul 27, 7:48 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| Aug 3, 2:45 PM MDT | Flash Flood Watch | BYZ | 30 hr |
| Aug 5, 7:44 PM MDT | Special Weather Statement | BYZ | 46 min |
| Aug 5, 8:30 PM MDT | Special Weather Statement | BYZ | 60 min |
| Aug 12, 3:54 PM MDT | Special Weather Statement | BYZ | 51 min |
| Aug 17, 2:47 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 5, 4:25 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 5, 6:00 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Sep 5, 7:20 PM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| Sep 5, 7:41 PM MDT | Severe Thunderstorm Warning | BYZ | 49 min |
| Sep 5, 7:50 PM MDT | Special Weather Statement | BYZ | 55 min |
| Sep 5, 8:21 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Oct 10, 2:43 PM MDT | High Wind Warning | BYZ | 30 hr |
| Oct 11, 3:14 AM MDT | Red Flag Warning | BYZ | 17 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 23, 2:57 PM MST | Winter Weather Advisory | BYZ | 66 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 20, 9:14 AM MST | Dense Fog Advisory | BYZ | 3 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 | 18 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 17 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 2 |
| Flash Flood Watch | 3 |
| River Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 5 |
| Cold | |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 4 |
| High Wind Watch | 2 |
| Fire | |
| Red Flag Warning | 7 |
| Fire Weather Watch | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
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.