Alert archive / Montana / Rosebud County
Weather alerts in Rosebud County, Montana, 2013
177 weather alerts in 2013, 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 2013. Tap one for its archive.
- Alerts
- 177
- Warnings
- 55
- Watches
- 24
- Advisories
- 25
- Busiest month
- May32 alerts
- Busiest day
- May 27, 201314 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 4 tornado warnings covering Rosebud County in 2013 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 3 minutes after it went out.
Rosebud County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 1 | 75% | 1 | 100% | 3 min |
| Severe thunderstorm warnings | 40 | 18 | 55% | 22 | 77% | 21 min |
| Flash flood warnings | 7 | 0 | 100% | 1 | 0% |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Billings, MT: tornado warnings | 15 | 2 | 87% | 5 | 40% | 7 min |
| NWS Billings, MT: severe thunderstorm warnings | 196 | 118 | 40% | 320 | 75% | 24 min |
| NWS Billings, MT: flash flood warnings | 44 | 15 | 66% | 35 | 57% | 52 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 8, 3:51 PM MST | Winter Storm Watch | BYZ | 36 hr |
| Jan 9, 4:06 PM MST | Winter Storm Warning | BYZ | 60 hr |
| Jan 27, 3:14 AM MST | Winter Weather Advisory | BYZ | 28 hr |
| Jan 29, 3:04 PM MST | Winter Weather Advisory | BYZ | 48 hr |
| Feb 25, 4:04 PM MST | Winter Weather Advisory | BYZ | 11 hr |
| Mar 3, 2:25 PM MST | Winter Weather Advisory | BYZ | 31 hr |
| Mar 16, 3:16 AM MDT | Winter Storm Watch | BYZ | 12 hr |
| Mar 21, 4:00 AM MDT | Winter Weather Advisory | BYZ | 17 hr |
| Apr 7, 2:59 PM MDT | Winter Weather Advisory | BYZ | 24 hr |
| Apr 8, 2:58 PM MDT | Winter Storm Warning | BYZ | 24 hr |
| Apr 8, 2:58 PM MDT | Winter Weather Advisory | BYZ | 6 hr |
| Apr 12, 3:20 PM MDT | Winter Storm Watch | BYZ | 24 hr |
| Apr 13, 3:42 PM MDT | Winter Weather Advisory | BYZ | 30 hr |
| Apr 15, 2:28 PM MDT | Winter Storm Watch | BYZ | 13 hr |
| Apr 16, 3:00 AM MDT | Winter Weather Advisory | BYZ | 32 hr |
| Apr 20, 3:28 PM MDT | Winter Weather Advisory | BYZ | 44 hr |
| May 17, 5:35 AM MDT | Flash Flood Watch | BYZ | 22 hr |
| May 18, 4:26 PM MDT | Severe Thunderstorm Warning | BYZ | 64 min |
| May 18, 5:27 PM MDT | Flash Flood Warning | BYZ | 3 hr |
| May 19, 3:58 AM MDT | Flash Flood Watch | BYZ | 35 hr |
| May 25, 1:52 PM MDT | Tornado Watch | SPC | 8 hr |
| May 25, 5:38 PM MDT | Severe Thunderstorm Warning | BYZ | 52 min |
| May 25, 6:26 PM MDT | Severe Thunderstorm Warning | BYZ | 64 min |
| May 25, 7:13 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| May 25, 7:28 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| May 25, 7:47 PM MDT | Severe Thunderstorm Warning | BYZ | 43 min |
| May 25, 7:48 PM MDT | Mesoscale Discussion | SPC | 87 min |
| May 25, 8:28 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| May 26, 2:44 PM MDT | Mesoscale Discussion | SPC | 91 min |
| May 26, 3:47 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 26, 6:08 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 6:45 PM MDT | Tornado Warning | BYZ | 45 min |
| May 26, 8:44 PM MDT | Severe Thunderstorm Warning | BYZ | 61 min |
| May 26, 8:59 PM MDT | Tornado Warning | BYZ | 31 min |
| May 26, 9:31 PM MDT | Tornado Warning | BYZ | 44 min |
| May 26, 9:31 PM MDT | Mesoscale Discussion | SPC | 119 min |
| May 26, 9:44 PM MDT | Severe Thunderstorm Warning | BYZ | 61 min |
| May 26, 10:21 PM MDT | Severe Thunderstorm Warning | BYZ | 39 min |
| May 26, 11:05 PM MDT | Special Weather Statement | BYZ | 40 min |
| May 27, 11:51 AM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| May 27, 2:12 PM MDT | Severe Thunderstorm Warning | BYZ | 48 min |
| May 27, 3:06 PM MDT | Flash Flood Warning | BYZ | 3 hr |
| May 27, 3:06 PM MDT | Special Weather Statement | BYZ | 54 min |
| May 27, 3:20 PM MDT | Special Weather Statement | BYZ | 70 min |
| May 29, 4:01 AM MDT | Flash Flood Watch | BYZ | 59 hr |
| May 29, 5:35 PM MDT | Flash Flood Warning | BYZ | 3 hr |
| May 30, 10:11 AM MDT | Areal Flood Advisory | BYZ | 36 hr |
| May 30, 4:55 PM MDT | Areal Flood Advisory | BYZ | 36 hr |
| Jun 2, 7:56 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jun 2, 9:40 PM MDT | Special Weather Statement | BYZ | 35 min |
| Jun 2, 10:19 PM MDT | Special Weather Statement | BYZ | 41 min |
| Jun 11, 3:54 AM MDT | Flash Flood Watch | BYZ | 68 hr |
| Jun 11, 12:05 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 11, 1:07 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 11, 4:06 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 11, 4:23 PM MDT | Flash Flood Warning | BYZ | 4 hr |
| Jun 11, 5:15 PM MDT | Special Weather Statement | BYZ | 45 min |
| Jun 11, 6:23 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jun 12, 4:06 PM MDT | Mesoscale Discussion | SPC | 54 min |
| Jun 13, 12:37 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jun 13, 1:06 PM MDT | Severe Thunderstorm Watch | SPC | 12 hr |
| Jun 13, 1:30 PM MDT | Special Weather Statement | BYZ | 45 min |
| Jun 13, 4:00 PM MDT | Severe Thunderstorm Warning | BYZ | 45 min |
| Jun 13, 4:44 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jun 13, 7:43 PM MDT | Severe Thunderstorm Warning | BYZ | 47 min |
| Jun 13, 8:06 PM MDT | Mesoscale Discussion | SPC | 54 min |
| Jun 13, 8:29 PM MDT | Severe Thunderstorm Warning | BYZ | 46 min |
| Jun 13, 9:11 PM MDT | Severe Thunderstorm Warning | BYZ | 34 min |
| Jun 13, 10:53 PM MDT | Severe Thunderstorm Warning | BYZ | 37 min |
| Jun 13, 11:19 PM MDT | Severe Thunderstorm Warning | BYZ | 56 min |
| Jun 13, 11:25 PM MDT | Flash Flood Warning | BYZ | 3 hr |
| Jun 13, 11:56 PM MDT | Severe Thunderstorm Warning | BYZ | 64 min |
| Jun 19, 8:56 PM MDT | Special Weather Statement | BYZ | 49 min |
| Jun 19, 10:30 PM MDT | Special Weather Statement | BYZ | 45 min |
| Jun 20, 7:12 PM MDT | Special Weather Statement | BYZ | 33 min |
| Jun 24, 6:39 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jul 6, 11:27 PM MDT | Special Weather Statement | BYZ | 63 min |
| Jul 7, 2:47 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 7, 4:00 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 7, 5:11 PM MDT | Special Weather Statement | BYZ | 49 min |
| Jul 7, 6:03 PM MDT | Special Weather Statement | BYZ | 57 min |
| Jul 7, 6:08 PM MDT | Severe Thunderstorm Warning | BYZ | 37 min |
| Jul 7, 6:31 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Jul 7, 9:06 PM MDT | Special Weather Statement | BYZ | 39 min |
| Jul 8, 3:42 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 4:01 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 8, 4:07 PM MDT | Severe Thunderstorm Warning | BYZ | 53 min |
| Jul 8, 4:58 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 5:05 PM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| Jul 8, 5:21 PM MDT | Tornado Warning | BYZ | 24 min |
| Jul 8, 5:57 PM MDT | Severe Thunderstorm Warning | BYZ | 63 min |
| Jul 8, 6:21 PM MDT | Severe Thunderstorm Warning | BYZ | 69 min |
| Jul 22, 6:26 PM MDT | Special Weather Statement | BYZ | 64 min |
| Jul 22, 6:58 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Jul 24, 7:48 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 24, 8:31 PM MDT | Special Weather Statement | BYZ | 59 min |
| Jul 24, 9:22 PM MDT | Special Weather Statement | BYZ | 38 min |
| Jul 26, 1:12 AM MDT | Special Weather Statement | BYZ | 63 min |
| Jul 26, 1:28 AM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Jul 28, 3:56 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 28, 9:30 PM MDT | Special Weather Statement | BYZ | 60 min |
| Jul 28, 10:33 PM MDT | Special Weather Statement | BYZ | 57 min |
| Jul 30, 2:08 AM MDT | Special Weather Statement | BYZ | 37 min |
| Jul 30, 2:48 AM MDT | Special Weather Statement | BYZ | 57 min |
| Jul 30, 2:53 AM MDT | Special Weather Statement | BYZ | 67 min |
| Jul 30, 3:37 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 1, 1:26 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Aug 1, 8:41 PM MDT | Severe Thunderstorm Warning | BYZ | 64 min |
| Aug 1, 9:17 PM MDT | Severe Thunderstorm Warning | BYZ | 58 min |
| Aug 1, 10:10 PM MDT | Severe Thunderstorm Warning | BYZ | 65 min |
| Aug 3, 1:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Aug 3, 1:50 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 3, 4:15 PM MDT | Special Weather Statement | BYZ | 45 min |
| Aug 3, 4:56 PM MDT | Special Weather Statement | BYZ | 49 min |
| Aug 3, 5:15 PM MDT | Severe Thunderstorm Warning | BYZ | 45 min |
| Aug 3, 5:44 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Aug 3, 6:00 PM MDT | Severe Thunderstorm Warning | BYZ | 60 min |
| Aug 3, 6:11 PM MDT | Severe Thunderstorm Warning | BYZ | 49 min |
| Aug 3, 6:15 PM MDT | Severe Thunderstorm Warning | BYZ | 45 min |
| Aug 3, 6:59 PM MDT | Severe Thunderstorm Warning | BYZ | 46 min |
| Aug 5, 2:31 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 5, 3:04 PM MDT | Severe Thunderstorm Warning | BYZ | 56 min |
| Aug 5, 4:05 PM MDT | Special Weather Statement | BYZ | 55 min |
| Aug 5, 4:52 PM MDT | Severe Thunderstorm Warning | BYZ | 53 min |
| Aug 7, 5:22 PM MDT | Special Weather Statement | BYZ | 38 min |
| Aug 7, 6:04 PM MDT | Special Weather Statement | BYZ | 41 min |
| Aug 7, 6:09 PM MDT | Severe Thunderstorm Warning | BYZ | 51 min |
| Aug 8, 10:37 PM MDT | Severe Thunderstorm Warning | BYZ | 38 min |
| Aug 12, 2:10 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 12, 9:44 PM MDT | Special Weather Statement | BYZ | 46 min |
| Aug 12, 10:32 PM MDT | Special Weather Statement | BYZ | 58 min |
| Aug 13, 12:52 AM MDT | Flash Flood Warning | BYZ | 3 hr |
| Aug 14, 8:02 PM MDT | Special Weather Statement | BYZ | 58 min |
| Aug 28, 2:54 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Aug 28, 4:23 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 28, 6:23 PM MDT | Severe Thunderstorm Warning | BYZ | 37 min |
| Aug 30, 3:47 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Aug 30, 5:04 PM MDT | Severe Thunderstorm Warning | BYZ | 86 min |
| Sep 5, 5:55 PM MDT | Special Weather Statement | BYZ | 50 min |
| Sep 5, 6:48 PM MDT | Special Weather Statement | BYZ | 42 min |
| Sep 5, 7:36 PM MDT | Special Weather Statement | BYZ | 54 min |
| Sep 6, 12:50 AM MDT | Special Weather Statement | BYZ | 40 min |
| Sep 6, 5:32 PM MDT | Special Weather Statement | BYZ | 43 min |
| Sep 6, 6:15 PM MDT | Special Weather Statement | BYZ | 45 min |
| Sep 7, 9:49 AM MDT | Flash Flood Watch | BYZ | 40 hr |
| Sep 7, 2:24 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 7, 4:21 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 7, 11:08 PM MDT | Severe Thunderstorm Warning | BYZ | 52 min |
| Sep 8, 12:51 AM MDT | Flash Flood Warning | BYZ | 3 hr |
| Sep 8, 12:53 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Sep 8, 1:40 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 8, 4:49 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Sep 8, 6:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Sep 8, 9:34 PM MDT | Special Weather Statement | BYZ | 41 min |
| Sep 8, 10:17 PM MDT | Special Weather Statement | BYZ | 58 min |
| Sep 17, 6:29 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Sep 18, 4:20 PM MDT | Special Weather Statement | BYZ | 40 min |
| Sep 24, 11:05 PM MDT | Special Weather Statement | BYZ | 55 min |
| Sep 30, 1:15 PM MDT | Special Weather Statement | BYZ | 60 min |
| Oct 1, 1:47 PM MDT | Winter Storm Watch | BYZ | 25 hr |
| Oct 2, 2:49 PM MDT | Winter Storm Warning | BYZ | 60 hr |
| Oct 12, 3:21 PM MDT | Winter Storm Watch | BYZ | 25 hr |
| Oct 13, 4:38 PM MDT | Winter Weather Advisory | BYZ | 29 hr |
| Oct 27, 3:59 PM MDT | Winter Weather Advisory | BYZ | 29 hr |
| Nov 10, 9:47 AM MST | Winter Weather Advisory | BYZ | 23 hr |
| Nov 19, 3:55 AM MST | Winter Weather Advisory | BYZ | 47 hr |
| Nov 30, 3:06 PM MST | Winter Storm Warning | BYZ | 3 days |
| Dec 1, 4:07 AM MST | Winter Storm Watch | BYZ | 24 hr |
| Dec 2, 3:51 AM MST | Winter Weather Advisory | BYZ | 47 hr |
| Dec 4, 2:47 AM MST | Winter Weather Advisory | BYZ | 20 hr |
| Dec 4, 10:45 PM MST | Wind Chill Advisory | BYZ | 64 hr |
| Dec 8, 3:59 AM MST | Wind Chill Advisory | BYZ | 31 hr |
| Dec 8, 3:59 AM MST | Winter Weather Advisory | BYZ | 65 hr |
| Dec 18, 4:00 AM MST | Winter Weather Advisory | BYZ | 36 hr |
| Dec 23, 8:15 PM MST | Freezing Rain Advisory | BYZ | 14 hr |
| Dec 28, 2:57 AM MST | Wind Chill Advisory | BYZ | 20 hr |
| Dec 31, 3:32 AM MST | Winter Weather Advisory | BYZ | 38 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 archive20122014
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.