Alert archive / Montana / Rosebud County
Weather alerts in Rosebud County, Montana, 2011
181 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 181
- Warnings
- 65
- Watches
- 30
- Advisories
- 29
- Busiest month
- July58 alerts
- Busiest day
- July 15, 201115 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, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 36 | 12 | 67% | 11 | 91% | 25 min |
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Billings, MT: tornado warnings | 13 | 5 | 62% | 8 | 75% | 21 min |
| NWS Billings, MT: severe thunderstorm warnings | 171 | 76 | 56% | 190 | 74% | 21 min |
| NWS Billings, MT: flash flood warnings | 21 | 5 | 76% | 7 | 100% | 40 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 1, 3:46 AM MST | Winter Weather Advisory | BYZ | 49 hr |
| Jan 6, 3:50 PM MST | Winter Storm Watch | BYZ | 23 hr |
| Jan 7, 3:19 PM MST | Winter Weather Advisory | BYZ | 47 hr |
| Jan 10, 3:19 PM MST | Wind Chill Advisory | BYZ | 20 hr |
| Jan 13, 10:05 PM MST | Winter Weather Advisory | BYZ | 4 hr |
| Jan 14, 4:20 AM MST | Winter Weather Advisory | BYZ | 18 hr |
| Jan 15, 9:23 AM MST | Winter Weather Advisory | BYZ | 6 hr |
| Jan 16, 5:31 AM MST | Winter Weather Advisory | BYZ | 14 hr |
| Jan 17, 12:47 AM MST | Freezing Rain Advisory | BYZ | 14 hr |
| Jan 17, 3:48 PM MST | Winter Weather Advisory | BYZ | 44 hr |
| Jan 20, 3:45 PM MST | Winter Storm Watch | BYZ | 24 hr |
| Jan 21, 3:39 PM MST | Winter Weather Advisory | BYZ | 25 hr |
| Jan 28, 3:17 PM MST | Winter Weather Advisory | BYZ | 60 hr |
| Jan 31, 3:33 AM MST | Wind Chill Advisory | BYZ | 25 hr |
| Feb 4, 2:51 PM MST | Winter Weather Advisory | BYZ | 24 hr |
| Feb 5, 3:10 PM MST | Winter Storm Watch | BYZ | 24 hr |
| Feb 5, 9:22 PM MST | Winter Weather Advisory | BYZ | 14 hr |
| Feb 6, 3:08 PM MST | Winter Storm Warning | BYZ | 33 hr |
| Feb 6, 3:08 PM MST | Winter Weather Advisory | BYZ | 33 hr |
| Feb 7, 4:20 PM MST | Wind Chill Advisory | BYZ | 10 hr |
| Feb 11, 3:46 AM MST | High Wind Warning | BYZ | 62 hr |
| Feb 17, 5:27 AM MST | Winter Weather Advisory | BYZ | 7 hr |
| Feb 19, 3:47 AM MST | Winter Storm Warning | BYZ | 38 hr |
| Feb 19, 3:47 AM MST | Winter Weather Advisory | BYZ | 38 hr |
| Feb 23, 7:56 PM MST | Wind Chill Advisory | BYZ | 30 hr |
| Mar 15, 10:11 AM MDT | Areal Flood Warning | BYZ | 4 days |
| Mar 22, 2:04 AM MDT | Winter Weather Advisory | BYZ | 37 hr |
| Mar 25, 3:22 PM MDT | Winter Storm Warning | BYZ | 21 hr |
| Mar 27, 12:51 PM MDT | Winter Weather Advisory | BYZ | 24 hr |
| Apr 7, 3:51 AM MDT | Winter Weather Advisory | BYZ | 38 hr |
| Apr 17, 4:34 AM MDT | Winter Storm Watch | BYZ | 34 hr |
| Apr 18, 2:44 PM MDT | Winter Weather Advisory | BYZ | 24 hr |
| Apr 22, 3:15 AM MDT | Winter Weather Advisory | BYZ | 15 hr |
| Apr 29, 3:53 PM MDT | Winter Weather Advisory | BYZ | 16 hr |
| Apr 30, 4:43 AM MDT | High Wind Warning | BYZ | 13 hr |
| May 9, 8:34 PM MDT | Flood Watch | BYZ | 19 hr |
| May 10, 8:46 AM MDT | Areal Flood Warning | BYZ | 24 hr |
| May 17, 3:35 PM MDT | Flood Watch | BYZ | 5 days |
| May 21, 2:33 PM MDT | Areal Flood Warning | BYZ | 22 hr |
| May 22, 7:42 AM MDT | River Flood Warning | BYZ | 7 days |
| May 23, 9:52 AM MDT | Flood Watch | BYZ | 48 hr |
| May 26, 2:01 PM MDT | River Flood Warning | BYZ | 69 hr |
| May 27, 3:48 AM MDT | Flood Watch | BYZ | 4 days |
| May 29, 8:20 PM MDT | Areal Flood Warning | BYZ | 37 hr |
| May 30, 12:18 AM MDT | Areal Flood Warning | BYZ | 35 hr |
| May 31, 6:04 AM MDT | River Flood Warning | BYZ | 3 days |
| Jun 2, 1:46 PM MDT | Special Weather Statement | BYZ | 59 min |
| Jun 2, 1:58 PM MDT | Special Weather Statement | BYZ | 62 min |
| Jun 2, 2:05 PM MDT | Severe Thunderstorm Warning | BYZ | 39 min |
| Jun 2, 2:09 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 2, 3:09 PM MDT | Severe Thunderstorm Warning | BYZ | 45 min |
| Jun 3, 4:03 PM MDT | River Flood Watch | BYZ | 4 days |
| Jun 6, 4:45 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 5:46 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 6, 8:25 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jun 6, 10:16 PM MDT | Special Weather Statement | BYZ | 59 min |
| Jun 6, 10:25 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jun 6, 10:42 PM MDT | Severe Thunderstorm Warning | BYZ | 63 min |
| Jun 6, 11:42 PM MDT | Severe Thunderstorm Warning | BYZ | 35 min |
| Jun 7, 3:20 AM MDT | Flash Flood Warning | BYZ | 3 hr |
| Jun 9, 2:58 AM MDT | Flood Watch | BYZ | 13 hr |
| Jun 9, 3:19 AM MDT | River Flood Warning | BYZ | 4 days |
| Jun 9, 9:15 AM MDT | River Flood Warning | BYZ | 26 days |
| Jun 11, 5:35 PM MDT | Special Weather Statement | BYZ | 55 min |
| Jun 12, 3:39 PM MDT | Severe Thunderstorm Warning | BYZ | 54 min |
| Jun 12, 8:01 PM MDT | Special Weather Statement | BYZ | 44 min |
| Jun 15, 1:44 PM MDT | River Flood Warning | BYZ | 5 days |
| Jun 15, 8:56 PM MDT | Severe Thunderstorm Warning | BYZ | 64 min |
| Jun 15, 9:16 PM MDT | Special Weather Statement | BYZ | 59 min |
| Jun 15, 9:49 PM MDT | Severe Thunderstorm Warning | BYZ | 56 min |
| Jun 16, 4:35 AM MDT | Flood Watch | BYZ | 24 hr |
| Jun 17, 4:51 AM MDT | Areal Flood Warning | BYZ | 7 hr |
| Jun 22, 3:00 PM MDT | River Flood Watch | BYZ | 26 hr |
| Jun 23, 3:17 PM MDT | River Flood Warning | BYZ | 19 days |
| Jun 23, 9:05 PM MDT | Special Weather Statement | BYZ | 55 min |
| Jun 24, 1:52 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 11:37 PM MDT | Special Weather Statement | BYZ | 53 min |
| Jun 25, 12:14 AM MDT | Special Weather Statement | BYZ | 61 min |
| Jun 26, 2:31 PM MDT | Special Weather Statement | BYZ | 59 min |
| Jul 2, 12:17 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 2, 2:13 PM MDT | Tornado Watch | SPC | 8 hr |
| Jul 3, 12:31 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 4:08 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 3, 6:29 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 6:39 PM MDT | Severe Thunderstorm Warning | BYZ | 36 min |
| Jul 3, 7:14 PM MDT | Severe Thunderstorm Warning | BYZ | 43 min |
| Jul 3, 7:37 PM MDT | Special Weather Statement | BYZ | 53 min |
| Jul 3, 8:02 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 3, 8:35 PM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| Jul 3, 9:39 PM MDT | Severe Thunderstorm Warning | BYZ | 51 min |
| Jul 3, 10:25 PM MDT | Severe Thunderstorm Warning | BYZ | 52 min |
| Jul 6, 1:15 AM MDT | Special Weather Statement | BYZ | 60 min |
| Jul 6, 1:50 AM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| Jul 6, 2:46 AM MDT | Severe Thunderstorm Warning | BYZ | 59 min |
| Jul 6, 2:19 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 8:38 PM MDT | Severe Thunderstorm Warning | BYZ | 42 min |
| Jul 7, 9:31 PM MDT | Special Weather Statement | BYZ | 59 min |
| Jul 7, 10:26 PM MDT | Special Weather Statement | BYZ | 49 min |
| Jul 8, 5:34 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Jul 8, 5:50 PM MDT | Special Weather Statement | BYZ | 70 min |
| Jul 11, 6:07 PM MDT | Severe Thunderstorm Warning | BYZ | 36 min |
| Jul 13, 9:51 PM MDT | Severe Thunderstorm Warning | BYZ | 34 min |
| Jul 14, 1:56 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 14, 6:09 PM MDT | Severe Thunderstorm Warning | BYZ | 51 min |
| Jul 14, 6:33 PM MDT | Mesoscale Discussion | SPC | 57 min |
| Jul 14, 6:45 PM MDT | Special Weather Statement | BYZ | 60 min |
| Jul 14, 6:59 PM MDT | Severe Thunderstorm Warning | BYZ | 31 min |
| Jul 14, 7:16 PM MDT | Severe Thunderstorm Warning | BYZ | 59 min |
| Jul 14, 7:45 PM MDT | Severe Thunderstorm Warning | BYZ | 60 min |
| Jul 14, 8:02 PM MDT | Severe Thunderstorm Warning | BYZ | 58 min |
| Jul 14, 8:19 PM MDT | Special Weather Statement | BYZ | 41 min |
| Jul 14, 9:03 PM MDT | Special Weather Statement | BYZ | 57 min |
| Jul 14, 9:17 PM MDT | Severe Thunderstorm Warning | BYZ | 58 min |
| Jul 14, 10:16 PM MDT | Severe Thunderstorm Warning | BYZ | 29 min |
| Jul 14, 10:29 PM MDT | Flash Flood Warning | BYZ | 3 hr |
| Jul 14, 11:02 PM MDT | Special Weather Statement | BYZ | 58 min |
| Jul 15, 2:39 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 3:26 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 15, 6:26 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jul 15, 6:44 PM MDT | Severe Thunderstorm Warning | BYZ | 61 min |
| Jul 15, 10:38 PM MDT | Severe Thunderstorm Warning | BYZ | 52 min |
| Jul 15, 10:43 PM MDT | Severe Thunderstorm Warning | BYZ | 41 min |
| Jul 16, 7:23 PM MDT | Severe Thunderstorm Warning | BYZ | 37 min |
| Jul 19, 9:06 PM MDT | Special Weather Statement | BYZ | 54 min |
| Jul 19, 11:24 PM MDT | Special Weather Statement | BYZ | 51 min |
| Jul 20, 12:04 AM MDT | Special Weather Statement | BYZ | 56 min |
| Jul 20, 1:10 AM MDT | Special Weather Statement | BYZ | 65 min |
| Jul 22, 1:06 PM MDT | Mesoscale Discussion | SPC | 24 min |
| Jul 22, 1:25 PM MDT | Tornado Watch | SPC | 8 hr |
| Jul 22, 3:18 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| Jul 22, 4:03 PM MDT | Special Weather Statement | BYZ | 57 min |
| Jul 22, 4:17 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 25, 1:30 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 26, 3:04 PM MDT | Severe Thunderstorm Warning | BYZ | 56 min |
| Jul 26, 4:04 PM MDT | Severe Thunderstorm Warning | BYZ | 56 min |
| Jul 26, 5:29 PM MDT | Severe Thunderstorm Warning | BYZ | 46 min |
| Jul 26, 11:44 PM MDT | Severe Thunderstorm Warning | BYZ | 46 min |
| Aug 1, 6:55 AM MDT | Special Weather Statement | BYZ | 50 min |
| Aug 4, 2:24 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Aug 5, 12:05 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 5, 2:55 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 5, 4:25 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 5, 6:32 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Aug 11, 5:12 PM MDT | Severe Thunderstorm Warning | BYZ | 49 min |
| Aug 11, 5:37 PM MDT | Severe Thunderstorm Warning | BYZ | 53 min |
| Aug 22, 2:39 PM MDT | Red Flag Warning | BYZ | 30 hr |
| Aug 25, 3:04 AM MDT | Red Flag Warning | BYZ | 18 hr |
| Aug 29, 1:52 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Aug 29, 2:34 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 29, 3:41 PM MDT | Severe Thunderstorm Warning | BYZ | 51 min |
| Aug 29, 5:00 PM MDT | Special Weather Statement | BYZ | 45 min |
| Aug 29, 5:09 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Aug 29, 6:00 PM MDT | Special Weather Statement | BYZ | 60 min |
| Aug 30, 3:26 PM MDT | Red Flag Warning | BYZ | 30 hr |
| Aug 31, 2:20 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Aug 31, 5:32 PM MDT | Special Weather Statement | BYZ | 58 min |
| Aug 31, 6:31 PM MDT | Special Weather Statement | BYZ | 59 min |
| Sep 19, 2:23 AM MDT | Red Flag Warning | BYZ | 19 hr |
| Sep 19, 1:15 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 19, 4:59 PM MDT | Special Weather Statement | BYZ | 46 min |
| Sep 19, 5:43 PM MDT | Special Weather Statement | BYZ | 47 min |
| Sep 19, 7:19 PM MDT | Special Weather Statement | BYZ | 56 min |
| Sep 19, 7:42 PM MDT | Special Weather Statement | BYZ | 33 min |
| Sep 27, 2:35 PM MDT | Fire Weather Watch | BYZ | 13 hr |
| Sep 29, 3:05 PM MDT | Fire Weather Watch | BYZ | 14 hr |
| Sep 30, 4:04 AM MDT | Red Flag Warning | BYZ | 41 hr |
| Oct 2, 5:47 PM MDT | Special Weather Statement | BYZ | 58 min |
| Oct 3, 3:11 PM MDT | Red Flag Warning | BYZ | 29 hr |
| Oct 6, 3:33 PM MDT | High Wind Watch | BYZ | 12 hr |
| Oct 7, 3:45 AM MDT | High Wind Warning | BYZ | 11 hr |
| Nov 4, 2:53 PM MDT | Winter Weather Advisory | BYZ | 33 hr |
| Nov 16, 3:05 PM MST | Winter Storm Watch | BYZ | 38 hr |
| Nov 17, 3:46 AM MST | Winter Storm Warning | BYZ | 49 hr |
| Nov 17, 3:37 PM MST | Winter Weather Advisory | BYZ | 48 hr |
| Nov 29, 3:50 AM MST | Winter Storm Watch | BYZ | 24 hr |
| Nov 29, 4:16 PM MST | Winter Weather Advisory | BYZ | 35 hr |
| Dec 20, 3:47 PM MST | Winter Weather Advisory | BYZ | 29 hr |
| Dec 27, 8:56 AM MST | High Wind Warning | BYZ | 60 hr |
| Dec 27, 2:39 PM MST | High Wind Watch | BYZ | 38 hr |
| Dec 29, 8:20 AM MST | Special Weather Statement | BYZ | 55 min |
| Dec 30, 3:21 AM MST | High Wind Watch | BYZ | 23 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.