Alert archive / Montana / Sweet Grass County
Weather alerts in Sweet Grass County, Montana, 2014
126 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sweet Grass County and its neighbors
Each county as a circle sized by its count in 2014. Tap one for its archive.
- Alerts
- 126
- Warnings
- 29
- Watches
- 19
- Advisories
- 45
- Busiest month
- February18 alerts
- Busiest day
- May 18, 20147 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Sweet Grass County, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 3 | 25% | 6 | 33% | 12 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Billings, MT: tornado warnings | 6 | 2 | 67% | 6 | 50% | 10 min |
| NWS Billings, MT: severe thunderstorm warnings | 120 | 56 | 53% | 151 | 77% | 25 min |
| NWS Billings, MT: flash flood warnings | 4 | 2 | 50% | 6 | 33% | 106 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, 3:10 PM MST | High Wind Watch | BYZ | 12 hr |
| Jan 2, 3:08 AM MST | High Wind Warning | BYZ | 36 hr |
| Jan 2, 3:31 PM MST | Winter Weather Advisory | BYZ | 60 hr |
| Jan 5, 4:00 AM MST | Wind Chill Advisory | BYZ | 24 hr |
| Jan 6, 10:15 AM MST | Wind Advisory | BYZ | 18 hr |
| Jan 8, 2:46 PM MST | High Wind Watch | BYZ | 4 days |
| Jan 9, 3:20 PM MST | Wind Advisory | BYZ | 4 days |
| Jan 11, 3:48 AM MST | High Wind Warning | BYZ | 67 hr |
| Jan 14, 3:08 PM MST | Wind Advisory | BYZ | 26 hr |
| Jan 18, 2:15 PM MST | Wind Advisory | BYZ | 24 hr |
| Jan 21, 8:45 PM MST | Winter Weather Advisory | BYZ | 18 hr |
| Jan 25, 3:49 PM MST | Winter Weather Advisory | BYZ | 24 hr |
| Jan 27, 3:14 PM MST | Winter Storm Watch | BYZ | 37 hr |
| Jan 28, 3:51 AM MST | Wind Advisory | BYZ | 36 hr |
| Jan 28, 3:08 PM MST | Winter Storm Warning | BYZ | 48 hr |
| Jan 31, 3:39 AM MST | Winter Storm Warning | BYZ | 23 hr |
| Jan 31, 3:39 AM MST | Winter Weather Advisory | BYZ | 28 hr |
| Feb 2, 2:43 PM MST | Winter Weather Advisory | BYZ | 43 hr |
| Feb 3, 2:33 PM MST | Wind Chill Advisory | BYZ | 69 hr |
| Feb 7, 2:59 PM MST | Winter Weather Advisory | BYZ | 48 hr |
| Feb 9, 11:00 AM MST | Special Weather Statement | BYZ | 90 min |
| Feb 10, 3:48 AM MST | Blizzard Warning | BYZ | 29 hr |
| Feb 10, 3:48 AM MST | Winter Weather Advisory | BYZ | 39 hr |
| Feb 11, 3:54 PM MST | High Wind Warning | BYZ | 29 hr |
| Feb 13, 3:07 AM MST | Wind Advisory | BYZ | 17 hr |
| Feb 15, 3:18 AM MST | Wind Advisory | BYZ | 41 hr |
| Feb 16, 3:22 AM MST | High Wind Warning | BYZ | 53 hr |
| Feb 16, 11:54 AM MST | Special Weather Statement | BYZ | 81 min |
| Feb 17, 3:04 PM MST | Wind Advisory | BYZ | 6 hr |
| Feb 18, 2:44 PM MST | Wind Advisory | BYZ | 15 hr |
| Feb 21, 2:26 PM MST | Winter Storm Watch | BYZ | 24 hr |
| Feb 22, 2:50 PM MST | Winter Storm Warning | BYZ | 65 hr |
| Feb 25, 1:03 PM MST | Winter Storm Watch | BYZ | 51 hr |
| Feb 27, 5:21 AM MST | Winter Storm Warning | BYZ | 61 hr |
| Feb 28, 9:19 AM MST | Special Weather Statement | BYZ | 71 min |
| Mar 1, 6:02 PM MST | Wind Chill Warning | BYZ | 18 hr |
| Mar 3, 10:49 PM MST | Special Weather Statement | BYZ | 116 min |
| Mar 5, 2:25 PM MST | Wind Advisory | BYZ | 19 hr |
| Mar 6, 3:08 PM MST | Areal Flood Advisory | BYZ | 24 hr |
| Mar 8, 2:29 AM MST | Wind Advisory | BYZ | 48 hr |
| Mar 8, 3:41 PM MST | Winter Storm Watch | BYZ | 23 hr |
| Mar 9, 3:27 PM MDT | Winter Storm Warning | BYZ | 42 hr |
| Mar 9, 7:53 PM MDT | Areal Flood Advisory | BYZ | 60 hr |
| Mar 15, 5:23 PM MDT | Wind Advisory | BYZ | 34 hr |
| Mar 16, 3:57 AM MDT | Winter Weather Advisory | BYZ | 48 hr |
| Mar 17, 8:05 PM MDT | Winter Storm Warning | BYZ | 10 hr |
| Mar 23, 3:01 AM MDT | Winter Weather Advisory | BYZ | 17 hr |
| Mar 26, 3:50 AM MDT | Winter Weather Advisory | BYZ | 23 hr |
| Mar 28, 2:10 PM MDT | Winter Storm Watch | BYZ | 38 hr |
| Mar 29, 3:31 AM MDT | Winter Storm Warning | BYZ | 56 hr |
| Apr 2, 8:11 AM MDT | Winter Weather Advisory | BYZ | 12 hr |
| Apr 11, 3:04 PM MDT | Winter Storm Watch | BYZ | 12 hr |
| Apr 12, 3:11 AM MDT | Winter Storm Warning | BYZ | 31 hr |
| Apr 15, 4:39 PM MDT | Special Weather Statement | BYZ | 51 min |
| Apr 22, 2:28 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 22, 4:20 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Apr 22, 4:23 PM MDT | Special Weather Statement | BYZ | 52 min |
| May 5, 4:14 AM MDT | Winter Storm Watch | BYZ | 11 hr |
| May 5, 3:05 PM MDT | Winter Storm Warning | BYZ | 50 hr |
| May 10, 3:17 PM MDT | Winter Weather Advisory | BYZ | 15 hr |
| May 18, 12:37 PM MDT | Mesoscale Discussion | SPC | 83 min |
| May 18, 2:13 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 18, 2:57 PM MDT | Special Weather Statement | BYZ | 33 min |
| May 18, 3:08 PM MDT | Severe Thunderstorm Warning | BYZ | 37 min |
| May 18, 3:33 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| May 18, 3:49 PM MDT | Special Weather Statement | BYZ | 41 min |
| May 18, 4:57 PM MDT | Mesoscale Discussion | SPC | 63 min |
| May 25, 11:40 AM MDT | River Flood Watch | BYZ | 18 hr |
| May 26, 4:25 AM MDT | River Flood Watch | BYZ | 31 hr |
| May 26, 5:14 AM MDT | River Flood Warning | BYZ | 7 days |
| May 27, 11:18 AM MDT | River Flood Warning | BYZ | 3 days |
| May 28, 2:12 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 28, 2:47 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 28, 6:28 PM MDT | Mesoscale Discussion | SPC | 92 min |
| May 31, 5:12 PM MDT | Mesoscale Discussion | SPC | 93 min |
| May 31, 6:14 PM MDT | Special Weather Statement | BYZ | 46 min |
| Jun 2, 8:01 PM MDT | Special Weather Statement | BYZ | 59 min |
| Jun 3, 12:25 PM MDT | River Flood Watch | BYZ | 24 hr |
| Jun 20, 3:18 PM MDT | Special Weather Statement | BYZ | 42 min |
| Jun 21, 6:29 PM MDT | Special Weather Statement | BYZ | 46 min |
| Jun 25, 5:16 PM MDT | Special Weather Statement | BYZ | 44 min |
| Jun 26, 4:03 PM MDT | Special Weather Statement | BYZ | 42 min |
| Jun 26, 4:54 PM MDT | Special Weather Statement | BYZ | 51 min |
| Jun 27, 3:46 AM MDT | River Flood Watch | BYZ | 62 hr |
| Jul 3, 5:38 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jul 4, 5:23 PM MDT | Special Weather Statement | BYZ | 37 min |
| Jul 4, 6:04 PM MDT | Special Weather Statement | BYZ | 56 min |
| Jul 15, 11:49 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 2:38 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 12:25 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 22, 2:49 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jul 22, 5:02 PM MDT | Special Weather Statement | BYZ | 58 min |
| Jul 22, 5:20 PM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| Aug 15, 12:11 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Sep 9, 3:39 AM MDT | Winter Storm Watch | BYZ | 35 hr |
| Sep 10, 3:31 AM MDT | Winter Storm Warning | BYZ | 35 hr |
| Sep 18, 3:34 PM MDT | Special Weather Statement | BYZ | 56 min |
| Sep 18, 4:28 PM MDT | Severe Thunderstorm Warning | BYZ | 46 min |
| Oct 11, 7:43 PM MDT | Special Weather Statement | BYZ | 62 min |
| Oct 15, 3:16 AM MDT | Red Flag Warning | BYZ | 17 hr |
| Oct 15, 3:17 PM MDT | Wind Advisory | BYZ | 9 hr |
| Oct 21, 3:37 PM MDT | Special Weather Statement | BYZ | 83 min |
| Nov 2, 3:43 PM MST | Wind Advisory | BYZ | 59 hr |
| Nov 6, 10:52 PM MST | Wind Advisory | BYZ | 5 hr |
| Nov 7, 2:42 PM MST | Winter Storm Watch | BYZ | 37 hr |
| Nov 9, 3:54 AM MST | Winter Storm Warning | BYZ | 48 hr |
| Nov 9, 8:31 AM MST | Wind Advisory | BYZ | 9 hr |
| Nov 13, 3:22 PM MST | Winter Weather Advisory | BYZ | 38 hr |
| Nov 15, 3:04 PM MST | Winter Weather Advisory | BYZ | 29 hr |
| Nov 17, 4:10 AM MST | Wind Advisory | BYZ | 34 hr |
| Nov 21, 3:15 PM MST | Wind Advisory | BYZ | 29 hr |
| Nov 23, 2:55 PM MST | Wind Advisory | BYZ | 42 hr |
| Nov 24, 3:02 PM MST | Winter Storm Warning | BYZ | 48 hr |
| Nov 24, 3:02 PM MST | Winter Weather Advisory | BYZ | 51 hr |
| Nov 26, 11:49 AM MST | Wind Advisory | BYZ | 68 hr |
| Nov 28, 3:32 PM MST | Winter Weather Advisory | BYZ | 39 hr |
| Dec 19, 2:45 PM MST | Winter Storm Watch | BYZ | 13 hr |
| Dec 20, 3:51 AM MST | Wind Advisory | BYZ | 40 hr |
| Dec 20, 4:00 AM MST | Winter Storm Warning | BYZ | 40 hr |
| Dec 23, 2:41 AM MST | Wind Advisory | BYZ | 24 hr |
| Dec 23, 2:42 PM MST | Winter Weather Advisory | BYZ | 48 hr |
| Dec 24, 2:14 AM MST | High Wind Warning | BYZ | 12 hr |
| Dec 24, 3:53 AM MST | Winter Storm Warning | BYZ | 35 hr |
| Dec 27, 2:25 PM MST | Winter Weather Advisory | BYZ | 43 hr |
| Dec 28, 5:10 PM MST | Winter Storm Warning | BYZ | 16 hr |
| Dec 30, 3:56 AM MST | Winter Weather Advisory | BYZ | 29 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 | 4 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 12 |
| Special Weather Statement | 21 |
| Flooding | |
| River Flood Warning | 2 |
| River Flood Watch | 4 |
| Areal Flood Advisory | 2 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 15 |
| Winter Storm Watch | 10 |
| Winter Weather Advisory | 19 |
| Cold | |
| Wind Chill Warning | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 2 |
| Wind Advisory | 22 |
| Fire | |
| Red Flag Warning | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20132015
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.