Alert archive / Montana / Rosebud County
Weather alerts in Rosebud County, Montana, 2018
134 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 134
- Warnings
- 46
- Watches
- 19
- Advisories
- 22
- Busiest month
- June35 alerts
- Busiest day
- June 1, 201812 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, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 32 | 17 | 47% | 28 | 86% | 23 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Billings, MT: tornado warnings | 2 | 2 | 0% | 5 | 60% | 23 min |
| NWS Billings, MT: severe thunderstorm warnings | 176 | 84 | 52% | 213 | 73% | 23 min |
| NWS Billings, MT: flash flood warnings | 8 | 6 | 25% | 7 | 86% | 44 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 9, 4:11 AM MST | Winter Storm Watch | BYZ | 11 hr |
| Jan 9, 2:49 PM MST | Winter Storm Warning | BYZ | 28 hr |
| Jan 11, 3:54 AM MST | Winter Weather Advisory | BYZ | 41 hr |
| Jan 13, 12:27 PM MST | Special Weather Statement | BYZ | 2 hr |
| Jan 13, 2:54 PM MST | Special Weather Statement | BYZ | 3 hr |
| Jan 14, 2:23 AM MST | Winter Weather Advisory | BYZ | 24 hr |
| Jan 14, 2:26 AM MST | Wind Chill Advisory | BYZ | 57 hr |
| Jan 14, 1:11 PM MST | Special Weather Statement | BYZ | 19 min |
| Jan 14, 1:15 PM MST | Special Weather Statement | BYZ | 15 min |
| Jan 14, 1:54 PM MST | Special Weather Statement | BYZ | 81 min |
| Jan 19, 5:40 AM MST | Winter Weather Advisory | BYZ | 14 hr |
| Jan 31, 2:01 PM MST | Special Weather Statement | BYZ | 119 min |
| Feb 2, 2:51 PM MST | Winter Storm Watch | BYZ | 13 hr |
| Feb 2, 2:51 PM MST | Winter Storm Warning | BYZ | 3 days |
| Feb 2, 2:51 PM MST | Winter Weather Advisory | BYZ | 13 hr |
| Feb 6, 3:39 PM MST | Winter Storm Watch | BYZ | 35 hr |
| Feb 7, 3:33 PM MST | Winter Storm Warning | BYZ | 42 hr |
| Feb 7, 3:33 PM MST | Winter Weather Advisory | BYZ | 42 hr |
| Feb 9, 2:55 PM MST | Wind Chill Advisory | BYZ | 21 hr |
| Feb 11, 2:05 PM MST | Wind Chill Advisory | BYZ | 22 hr |
| Feb 14, 2:33 PM MST | Winter Weather Advisory | BYZ | 24 hr |
| Feb 16, 9:22 PM MST | Special Weather Statement | BYZ | 113 min |
| Feb 16, 11:55 PM MST | Special Weather Statement | BYZ | 95 min |
| Feb 17, 2:56 AM MST | Winter Weather Advisory | BYZ | 66 hr |
| Mar 2, 3:18 AM MST | Winter Storm Watch | BYZ | 48 hr |
| Mar 3, 3:07 AM MST | Winter Storm Warning | BYZ | 3 days |
| Mar 3, 6:46 AM MST | Dense Fog Advisory | BYZ | 4 hr |
| Mar 3, 2:34 PM MST | Winter Weather Advisory | BYZ | 49 hr |
| Mar 3, 2:38 PM MST | Dense Fog Advisory | BYZ | 21 hr |
| Mar 4, 11:58 AM MST | Special Weather Statement | BYZ | 3 hr |
| Mar 14, 2:49 PM MDT | Winter Storm Watch | BYZ | 12 hr |
| Mar 15, 2:37 AM MDT | Winter Storm Warning | BYZ | 41 hr |
| Mar 23, 3:13 PM MDT | Winter Storm Watch | BYZ | 36 hr |
| Mar 25, 2:50 AM MDT | Winter Weather Advisory | BYZ | 35 hr |
| Mar 25, 9:56 AM MDT | Areal Flood Warning | BYZ | 36 hr |
| Mar 30, 4:00 PM MDT | Special Weather Statement | BYZ | 60 min |
| Mar 31, 2:52 PM MDT | Winter Storm Watch | BYZ | 24 hr |
| Apr 1, 3:30 AM MDT | Winter Storm Warning | BYZ | 50 hr |
| Apr 4, 2:23 AM MDT | Winter Weather Advisory | BYZ | 61 hr |
| Apr 7, 10:18 PM MDT | Special Weather Statement | BYZ | 117 min |
| Apr 10, 2:58 PM MDT | Winter Storm Watch | BYZ | 36 hr |
| Apr 11, 3:15 PM MDT | Winter Storm Warning | BYZ | 48 hr |
| Apr 12, 2:36 AM MDT | Winter Weather Advisory | BYZ | 36 hr |
| Apr 23, 3:20 PM MDT | Winter Weather Advisory | BYZ | 15 hr |
| Apr 29, 12:40 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 29, 4:29 PM MDT | Severe Thunderstorm Warning | BYZ | 41 min |
| May 7, 2:49 PM MDT | Mesoscale Discussion | SPC | 116 min |
| May 7, 4:17 PM MDT | Special Weather Statement | BYZ | 58 min |
| May 16, 10:59 PM MDT | Special Weather Statement | BYZ | 46 min |
| May 17, 6:15 PM MDT | Special Weather Statement | BYZ | 45 min |
| May 23, 2:34 PM MDT | Mesoscale Discussion | SPC | 116 min |
| May 23, 2:52 PM MDT | Special Weather Statement | BYZ | 38 min |
| May 23, 3:35 PM MDT | Special Weather Statement | BYZ | 40 min |
| May 23, 3:45 PM MDT | Severe Thunderstorm Warning | BYZ | 60 min |
| May 23, 4:03 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| May 23, 6:12 PM MDT | Severe Thunderstorm Warning | BYZ | 63 min |
| May 23, 6:37 PM MDT | Severe Thunderstorm Warning | BYZ | 53 min |
| May 24, 1:37 PM MDT | River Flood Watch | BYZ | 5 days |
| May 26, 2:21 PM MDT | Mesoscale Discussion | SPC | 114 min |
| May 27, 12:52 AM MDT | Severe Thunderstorm Warning | BYZ | 23 min |
| May 27, 12:27 PM MDT | River Flood Warning | BYZ | 5 days |
| May 29, 3:48 PM MDT | Special Weather Statement | BYZ | 27 min |
| May 31, 1:50 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 31, 5:27 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 31, 7:01 PM MDT | Severe Thunderstorm Warning | BYZ | 42 min |
| May 31, 7:10 PM MDT | Severe Thunderstorm Warning | BYZ | 65 min |
| May 31, 8:18 PM MDT | Mesoscale Discussion | SPC | 57 min |
| May 31, 8:41 PM MDT | Severe Thunderstorm Warning | BYZ | 64 min |
| Jun 1, 12:24 AM MDT | Special Weather Statement | BYZ | 51 min |
| Jun 1, 11:03 AM MDT | Mesoscale Discussion | SPC | 117 min |
| Jun 1, 11:14 AM MDT | Severe Thunderstorm Warning | BYZ | 61 min |
| Jun 1, 11:45 AM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 1, 12:08 PM MDT | Severe Thunderstorm Warning | BYZ | 67 min |
| Jun 1, 12:23 PM MDT | Special Weather Statement | BYZ | 37 min |
| Jun 1, 1:01 PM MDT | Severe Thunderstorm Warning | BYZ | 44 min |
| Jun 1, 3:20 PM MDT | Areal Flood Warning | BYZ | 24 hr |
| Jun 4, 7:02 PM MDT | Severe Thunderstorm Warning | BYZ | 34 min |
| Jun 6, 6:57 PM MDT | Severe Thunderstorm Warning | BYZ | 63 min |
| Jun 7, 1:51 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 7, 3:49 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 7, 5:28 PM MDT | Severe Thunderstorm Warning | BYZ | 47 min |
| Jun 7, 5:38 PM MDT | Severe Thunderstorm Warning | BYZ | 37 min |
| Jun 7, 5:54 PM MDT | Severe Thunderstorm Warning | BYZ | 66 min |
| Jun 7, 6:14 PM MDT | Severe Thunderstorm Warning | BYZ | 61 min |
| Jun 7, 6:41 PM MDT | Severe Thunderstorm Warning | BYZ | 49 min |
| Jun 8, 5:50 PM MDT | Severe Thunderstorm Warning | BYZ | 22 min |
| Jun 15, 5:49 PM MDT | Severe Thunderstorm Warning | BYZ | 56 min |
| Jun 20, 2:34 PM MDT | Special Weather Statement | BYZ | 56 min |
| Jun 21, 6:43 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 21, 7:43 PM MDT | Special Weather Statement | BYZ | 47 min |
| Jun 21, 8:29 PM MDT | Special Weather Statement | BYZ | 61 min |
| Jun 28, 2:35 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 3:42 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 28, 5:59 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jun 28, 6:35 PM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| Jun 28, 6:48 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| Jun 28, 7:44 PM MDT | Severe Thunderstorm Warning | BYZ | 61 min |
| Jun 28, 8:06 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 28, 10:18 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| Jul 2, 5:58 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 2, 6:59 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 2, 8:49 PM MDT | Severe Thunderstorm Warning | BYZ | 56 min |
| Jul 2, 8:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 2, 9:39 PM MDT | Severe Thunderstorm Warning | BYZ | 51 min |
| Jul 2, 9:45 PM MDT | Severe Thunderstorm Warning | BYZ | 60 min |
| Jul 2, 10:23 PM MDT | Severe Thunderstorm Warning | BYZ | 52 min |
| Jul 3, 8:13 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 1:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jul 10, 2:14 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 10, 6:32 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 17, 3:25 AM MDT | Flash Flood Watch | BYZ | 18 hr |
| Jul 17, 5:51 PM MDT | Special Weather Statement | BYZ | 54 min |
| Jul 17, 6:00 PM MDT | Special Weather Statement | BYZ | 45 min |
| Jul 17, 6:52 PM MDT | Special Weather Statement | BYZ | 38 min |
| Jul 27, 5:57 PM MDT | Severe Thunderstorm Warning | BYZ | 48 min |
| Aug 2, 10:05 PM MDT | Special Weather Statement | BYZ | 55 min |
| Aug 3, 5:27 PM MDT | Severe Thunderstorm Warning | BYZ | 63 min |
| Aug 3, 6:10 PM MDT | Special Weather Statement | BYZ | 50 min |
| Aug 3, 6:28 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Aug 9, 3:51 AM MDT | Excessive Heat Warning | BYZ | 4 days |
| Aug 9, 2:50 PM MDT | Fire Weather Watch | BYZ | 37 hr |
| Aug 11, 3:28 AM MDT | Red Flag Warning | BYZ | 42 hr |
| Sep 15, 3:11 AM MDT | Red Flag Warning | BYZ | 18 hr |
| Sep 23, 8:04 AM MDT | Special Weather Statement | BYZ | 4 hr |
| Nov 15, 2:33 PM MST | Winter Weather Advisory | BYZ | 38 hr |
| Nov 25, 4:48 AM MST | Special Weather Statement | BYZ | 5 hr |
| Nov 29, 3:13 AM MST | Winter Storm Watch | BYZ | 24 hr |
| Nov 30, 3:33 AM MST | Winter Weather Advisory | BYZ | 48 hr |
| Dec 3, 7:39 PM MST | Dense Fog Advisory | BYZ | 9 hr |
| Dec 7, 2:12 AM MST | Special Weather Statement | BYZ | 4 hr |
| Dec 17, 1:46 PM MST | High Wind Warning | BYZ | 50 hr |
| Dec 18, 2:36 AM MST | High Wind Watch | BYZ | 18 hr |
| Dec 25, 3:17 AM MST | Winter Weather Advisory | BYZ | 38 hr |
| Dec 29, 1:58 PM MST | Winter Weather Advisory | BYZ | 49 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 | 32 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 17 |
| Special Weather Statement | 30 |
| Flooding | |
| Areal Flood Warning | 2 |
| River Flood Warning | 1 |
| Flash Flood Watch | 1 |
| River Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 7 |
| Winter Storm Watch | 9 |
| Winter Weather Advisory | 16 |
| Heat | |
| Excessive Heat Warning | 1 |
| Cold | |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.