Alert archive / Montana / Powder River County
Weather alerts in Powder River County, Montana, 2016
125 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Powder River County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 125
- Warnings
- 39
- Watches
- 15
- Advisories
- 8
- Busiest month
- June26 alerts
- Busiest day
- May 21, 20168 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Powder River County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 26 | 11 | 58% | 12 | 75% | 24 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 |
|---|---|---|---|
| Jan 24, 4:35 AM MST | Special Weather Statement | BYZ | 4 hr |
| 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 |
| Feb 18, 6:14 PM MST | Special Weather Statement | BYZ | 76 min |
| Feb 21, 8:34 AM MST | Special Weather Statement | BYZ | 3 hr |
| Feb 27, 6:04 PM MST | Special Weather Statement | BYZ | 56 min |
| Feb 29, 5:08 AM MST | Special Weather Statement | BYZ | 3 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 28, 2:46 PM MDT | Winter Weather Advisory | BYZ | 39 hr |
| Apr 3, 3:10 PM MDT | High Wind Watch | BYZ | 24 hr |
| Apr 4, 3:17 PM MDT | High Wind Warning | BYZ | 29 hr |
| Apr 14, 3:44 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 18, 1:29 AM MDT | Winter Weather Advisory | BYZ | 34 hr |
| May 20, 6:08 PM MDT | Special Weather Statement | BYZ | 52 min |
| May 20, 6:41 PM MDT | Special Weather Statement | BYZ | 64 min |
| May 20, 7:05 PM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| May 20, 7:20 PM MDT | Special Weather Statement | BYZ | 55 min |
| May 20, 8:16 PM MDT | Special Weather Statement | BYZ | 59 min |
| May 21, 2:54 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 21, 5:03 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 21, 5:57 PM MDT | Severe Thunderstorm Warning | BYZ | 63 min |
| May 21, 6:38 PM MDT | Mesoscale Discussion | SPC | 67 min |
| May 21, 6:57 PM MDT | Special Weather Statement | BYZ | 63 min |
| May 21, 8:16 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jun 9, 4:06 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 9, 6:05 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 9, 6:58 PM MDT | Severe Thunderstorm Warning | BYZ | 47 min |
| Jun 11, 2:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 11, 3:00 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 11, 3:25 PM MDT | Special Weather Statement | BYZ | 65 min |
| Jun 11, 4:25 PM MDT | Severe Thunderstorm Warning | BYZ | 65 min |
| Jun 11, 5:28 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jun 11, 5:53 PM MDT | Special Weather Statement | BYZ | 52 min |
| Jun 11, 6:32 PM MDT | Severe Thunderstorm Warning | BYZ | 58 min |
| Jun 11, 7:01 PM MDT | Severe Thunderstorm Warning | BYZ | 59 min |
| Jun 11, 7:20 PM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| Jun 11, 7:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jun 11, 7:55 PM MDT | Severe Thunderstorm Warning | BYZ | 47 min |
| Jun 13, 12:00 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jun 13, 12:45 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 13, 2:51 PM MDT | Mesoscale Discussion | SPC | 54 min |
| Jun 13, 6:00 PM MDT | Mesoscale Discussion | SPC | 90 min |
| Jun 17, 8:48 PM MDT | Special Weather Statement | BYZ | 57 min |
| Jun 17, 9:10 PM MDT | Severe Thunderstorm Warning | BYZ | 28 min |
| Jun 17, 11:45 PM MDT | Special Weather Statement | BYZ | 60 min |
| Jun 18, 2:07 AM MDT | Special Weather Statement | BYZ | 53 min |
| Jun 20, 9:10 PM MDT | Red Flag Warning | BYZ | 27 hr |
| Jun 23, 3:27 PM MDT | Red Flag Warning | BYZ | 32 hr |
| Jun 24, 7:38 PM MDT | Special Weather Statement | BYZ | 52 min |
| Jun 29, 12:47 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 8, 10:00 PM MDT | Special Weather Statement | BYZ | 60 min |
| Jul 8, 10:49 PM MDT | Severe Thunderstorm Warning | BYZ | 22 min |
| Jul 9, 2:19 PM MDT | Special Weather Statement | BYZ | 56 min |
| Jul 10, 1:19 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jul 10, 1:48 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 10, 2:34 PM MDT | Severe Thunderstorm Warning | BYZ | 56 min |
| Jul 10, 3:27 PM MDT | Severe Thunderstorm Warning | BYZ | 41 min |
| Jul 10, 8:41 PM MDT | Special Weather Statement | BYZ | 64 min |
| Jul 15, 11:02 PM MDT | Special Weather Statement | BYZ | 58 min |
| Jul 15, 11:50 PM MDT | Special Weather Statement | BYZ | 55 min |
| Jul 16, 12:23 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 16, 2:33 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 16, 3:24 PM MDT | Severe Thunderstorm Warning | BYZ | 66 min |
| Jul 16, 4:26 PM MDT | Severe Thunderstorm Warning | BYZ | 18 min |
| Jul 16, 4:38 PM MDT | Special Weather Statement | BYZ | 67 min |
| Jul 22, 11:13 AM MDT | Fire Weather Watch | BYZ | 15 hr |
| Jul 22, 8:38 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 1:46 AM MDT | Red Flag Warning | BYZ | 19 hr |
| Jul 27, 2:41 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 27, 7:26 PM MDT | Severe Thunderstorm Warning | BYZ | 64 min |
| Jul 27, 8:21 PM MDT | Severe Thunderstorm Warning | BYZ | 54 min |
| Jul 27, 9:01 PM MDT | Severe Thunderstorm Warning | BYZ | 59 min |
| Jul 27, 9:14 PM MDT | Severe Thunderstorm Warning | BYZ | 40 min |
| Jul 27, 9:25 PM MDT | Special Weather Statement | BYZ | 50 min |
| Jul 27, 9:43 PM MDT | Severe Thunderstorm Warning | BYZ | 25 min |
| Jul 27, 9:55 PM MDT | Severe Thunderstorm Warning | BYZ | 21 min |
| Jul 31, 11:25 PM MDT | Special Weather Statement | BYZ | 65 min |
| Aug 1, 12:20 AM MDT | Severe Thunderstorm Warning | BYZ | 30 min |
| Aug 2, 3:15 AM MDT | Red Flag Warning | BYZ | 42 hr |
| Aug 2, 1:46 PM MDT | Mesoscale Discussion | SPC | 119 min |
| Aug 2, 5:25 PM MDT | Special Weather Statement | BYZ | 65 min |
| Aug 2, 5:50 PM MDT | Severe Thunderstorm Warning | BYZ | 25 min |
| Aug 7, 12:28 AM MDT | Special Weather Statement | BYZ | 62 min |
| Aug 7, 5:06 PM MDT | Special Weather Statement | BYZ | 54 min |
| Aug 7, 5:26 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 6:04 PM MDT | Special Weather Statement | BYZ | 56 min |
| Aug 7, 6:47 PM MDT | Special Weather Statement | BYZ | 58 min |
| Aug 7, 7:44 PM MDT | Special Weather Statement | BYZ | 61 min |
| Aug 9, 3:21 PM MDT | Special Weather Statement | BYZ | 54 min |
| Aug 9, 3:51 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 9, 4:08 PM MDT | Severe Thunderstorm Warning | BYZ | 52 min |
| Aug 9, 4:16 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 9, 4:58 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Aug 14, 4:56 PM MDT | Special Weather Statement | BYZ | 64 min |
| Aug 14, 5:48 PM MDT | Special Weather Statement | BYZ | 42 min |
| Aug 26, 8:30 AM MDT | Special Weather Statement | BYZ | 60 min |
| 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, 6:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Sep 1, 7:35 PM MDT | Special Weather Statement | BYZ | 40 min |
| Sep 1, 7:50 PM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| Sep 1, 8:22 PM MDT | Severe Thunderstorm Warning | BYZ | 23 min |
| Sep 1, 8:47 PM MDT | Special Weather Statement | BYZ | 43 min |
| Sep 1, 9:51 PM MDT | Special Weather Statement | BYZ | 24 min |
| Sep 1, 10:32 PM MDT | Special Weather Statement | BYZ | 58 min |
| Sep 2, 3:06 PM MDT | Special Weather Statement | BYZ | 24 min |
| Oct 3, 12:46 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Nov 16, 4:11 AM MST | Winter Weather Advisory | BYZ | 40 hr |
| Nov 27, 12:49 PM MST | Winter Storm Watch | BYZ | 14 hr |
| Nov 28, 2:25 AM MST | Winter Storm Warning | BYZ | 42 hr |
| Nov 29, 9:09 AM MST | Winter Weather Advisory | BYZ | 11 hr |
| Dec 4, 4:11 AM MST | Winter Weather Advisory | BYZ | 34 hr |
| Dec 6, 9:38 AM MST | Wind Chill Advisory | BYZ | 49 hr |
| Dec 13, 2:06 PM MST | Special Weather Statement | BYZ | 84 min |
| 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 17, 11:22 AM MST | Wind Chill Advisory | BYZ | 22 hr |
| Dec 22, 12:12 PM MST | Winter Storm Watch | BYZ | 24 hr |
| Dec 23, 11:42 AM MST | Winter Storm Warning | BYZ | 59 hr |
| Dec 25, 11:56 AM MST | Blizzard Warning | BYZ | 22 hr |
| Dec 28, 2:26 AM MST | Winter Weather Advisory | BYZ | 18 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 | 26 |
| Severe Thunderstorm Watch | 6 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 41 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 6 |
| Cold | |
| Wind Chill Warning | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 3 |
| Fire | |
| Red Flag Warning | 5 |
| 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.