Alert archive / Montana / Fallon County
Weather alerts in Fallon County, Montana, 2008
102 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Fallon County and its neighbors
Each county as a circle sized by its count in 2008. Tap one for its archive.
- Alerts
- 102
- Warnings
- 30
- Watches
- 24
- Advisories
- 21
- Busiest month
- July23 alerts
- Busiest day
- July 27, 20086 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Fallon County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 9 | 3 | 67% | 1 | 100% | 51 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Billings, MT: tornado warnings | 1 | 1 | 0% | 2 | 50% | 7 min |
| NWS Billings, MT: severe thunderstorm warnings | 187 | 80 | 57% | 140 | 79% | 27 min |
| NWS Billings, MT: flash flood warnings | 8 | 3 | 63% | 6 | 83% | 155 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 14, 3:51 AM MST | High Wind Watch | BYZ | 23 hr |
| Jan 16, 3:09 AM MST | Winter Storm Watch | BYZ | 13 hr |
| Jan 16, 3:41 PM MST | Winter Storm Warning | BYZ | 49 hr |
| Jan 19, 3:28 PM MST | Wind Chill Advisory | BYZ | 13 hr |
| Jan 21, 6:33 PM MST | Wind Chill Advisory | BYZ | 15 hr |
| Jan 22, 2:49 PM MST | Snow and Blowing Snow Advisory | BYZ | 17 hr |
| Jan 27, 2:40 PM MST | Winter Weather Advisory | BYZ | 31 hr |
| Jan 28, 9:24 PM MST | Wind Chill Warning | BYZ | 20 hr |
| Jan 28, 9:24 PM MST | Wind Chill Advisory | BYZ | 38 hr |
| Feb 3, 3:38 AM MST | Snow Advisory | BYZ | 30 hr |
| Feb 8, 4:00 AM MST | Winter Weather Advisory | BYZ | 41 hr |
| Feb 10, 2:54 PM MST | Snow Advisory | BYZ | 24 hr |
| Feb 13, 9:25 PM MST | Wind Chill Advisory | BYZ | 9 hr |
| Feb 16, 6:43 AM MST | Freezing Rain Advisory | BYZ | 3 hr |
| Feb 20, 3:09 AM MST | Wind Chill Advisory | BYZ | 8 hr |
| Mar 25, 2:57 PM MDT | Winter Storm Watch | BYZ | 45 hr |
| Apr 5, 4:13 AM MDT | Winter Storm Warning | BYZ | 24 hr |
| Apr 19, 9:41 AM MDT | Red Flag Warning | BYZ | 11 hr |
| Apr 22, 3:21 AM MDT | Red Flag Warning | BYZ | 17 hr |
| Apr 28, 3:03 PM MDT | Fire Weather Watch | BYZ | 15 hr |
| Apr 29, 5:59 AM MDT | Red Flag Warning | BYZ | 17 hr |
| Apr 30, 9:40 AM MDT | Winter Storm Watch | BYZ | 30 hr |
| May 1, 4:26 AM MDT | Winter Storm Warning | BYZ | 29 hr |
| May 1, 3:28 PM MDT | Snow Advisory | BYZ | 15 hr |
| May 21, 3:41 PM MDT | High Wind Watch | BYZ | 13 hr |
| May 22, 9:32 AM MDT | High Wind Warning | BYZ | 19 hr |
| Jun 10, 3:46 AM MDT | Flash Flood Watch | BYZ | 17 hr |
| Jun 13, 4:33 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jun 17, 12:40 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jun 17, 1:27 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 17, 6:29 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jun 22, 4:11 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jun 22, 6:00 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 8:30 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jun 23, 4:13 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Jun 24, 2:44 PM MDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 25, 7:49 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jun 26, 12:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jul 6, 1:32 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 6:08 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jul 10, 3:39 PM MDT | Red Flag Warning | BYZ | 26 hr |
| Jul 10, 3:59 PM MDT | High Wind Watch | BYZ | 10 hr |
| Jul 11, 2:28 AM MDT | High Wind Warning | BYZ | 15 hr |
| Jul 18, 1:30 PM MDT | Severe Thunderstorm Warning | BYZ | 45 min |
| Jul 18, 1:33 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 18, 3:11 PM MDT | Severe Thunderstorm Warning | BYZ | 64 min |
| Jul 18, 3:32 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 18, 4:12 PM MDT | Severe Thunderstorm Warning | BYZ | 33 min |
| Jul 22, 3:24 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 22, 8:03 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 22, 9:54 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Jul 23, 12:32 AM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 26, 1:44 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jul 26, 5:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 26, 8:57 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 26, 10:21 PM MDT | Severe Thunderstorm Warning | BYZ | 54 min |
| Jul 26, 11:09 PM MDT | Severe Thunderstorm Warning | BYZ | 66 min |
| Jul 27, 12:15 AM MDT | Severe Thunderstorm Warning | BYZ | 30 min |
| Jul 27, 1:12 AM MDT | Severe Thunderstorm Warning | BYZ | 30 min |
| Jul 27, 1:25 AM MDT | Mesoscale Discussion | SPC | 95 min |
| Jul 28, 2:02 AM MDT | Mesoscale Discussion | SPC | 88 min |
| Aug 2, 8:28 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Aug 2, 11:05 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 2, 11:41 PM MDT | Severe Thunderstorm Warning | BYZ | 64 min |
| Aug 3, 8:03 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Aug 3, 9:49 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 3, 11:00 PM MDT | Severe Thunderstorm Warning | BYZ | 60 min |
| Aug 5, 4:58 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 10, 12:10 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Aug 10, 12:46 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 10, 4:28 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Aug 21, 2:33 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Aug 25, 3:31 AM MDT | Red Flag Warning | BYZ | 38 hr |
| Aug 27, 3:41 AM MDT | Red Flag Warning | BYZ | 17 hr |
| Aug 29, 4:26 AM MDT | Fire Weather Watch | BYZ | 11 hr |
| Aug 29, 3:45 PM MDT | Red Flag Warning | BYZ | 29 hr |
| Sep 19, 3:06 PM MDT | Fire Weather Watch | BYZ | 12 hr |
| Sep 20, 3:32 AM MDT | Red Flag Warning | BYZ | 18 hr |
| Oct 9, 4:12 AM MDT | Winter Storm Watch | BYZ | 12 hr |
| Oct 9, 4:16 PM MDT | Winter Storm Warning | BYZ | 71 hr |
| Oct 11, 10:29 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Oct 25, 3:16 AM MDT | High Wind Watch | BYZ | 24 hr |
| Oct 26, 3:28 AM MDT | High Wind Warning | BYZ | 11 hr |
| Nov 5, 3:27 AM MST | Winter Weather Advisory | BYZ | 36 hr |
| Nov 14, 1:17 PM MST | Mesoscale Discussion | SPC | 58 min |
| Nov 21, 2:46 AM MST | Winter Weather Advisory | BYZ | 16 hr |
| Dec 6, 7:11 PM MST | Freezing Rain Advisory | BYZ | 4 hr |
| Dec 11, 3:40 PM MST | Winter Storm Watch | BYZ | 24 hr |
| Dec 12, 3:48 PM MST | Blizzard Warning | BYZ | 35 hr |
| Dec 12, 3:48 PM MST | Winter Storm Warning | BYZ | 35 hr |
| Dec 13, 10:35 AM MST | Mesoscale Discussion | SPC | 4 hr |
| Dec 13, 5:29 PM MST | Mesoscale Discussion | SPC | 4 hr |
| Dec 13, 9:16 PM MST | Wind Chill Advisory | BYZ | 31 hr |
| Dec 14, 9:34 AM MST | Wind Chill Warning | BYZ | 24 hr |
| Dec 18, 9:28 PM MST | Winter Weather Advisory | BYZ | 24 hr |
| Dec 19, 9:15 PM MST | Wind Chill Advisory | BYZ | 27 hr |
| Dec 20, 3:38 PM MST | Wind Chill Warning | BYZ | 18 hr |
| Dec 22, 4:20 AM MST | Wind Chill Advisory | BYZ | 7 hr |
| Dec 22, 4:20 AM MST | Winter Weather Advisory | BYZ | 35 hr |
| Dec 25, 2:18 PM MST | Winter Storm Warning | BYZ | 31 hr |
| Dec 25, 2:18 PM MST | Winter Weather Advisory | BYZ | 26 hr |
| Dec 26, 10:56 AM MST | Mesoscale Discussion | SPC | 4 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 archive20072009
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.