Alert archive / Montana / Glacier County
Weather alerts in Glacier County, Montana, 2008
38 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Glacier County and its neighbors
Each county as a circle sized by its count in 2008. Tap one for its archive.
- Alerts
- 38
- Warnings
- 21
- Watches
- 10
- Advisories
- 4
- Busiest month
- July15 alerts
- Busiest day
- July 4, 20087 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Glacier 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% | 16 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 Great Falls, MT: tornado warnings | 7 | 0 | 100% | 3 | 0% | |
| NWS Great Falls, MT: severe thunderstorm warnings | 141 | 74 | 48% | 141 | 72% | 19 min |
| NWS Great Falls, MT: flash flood warnings | 3 | 1 | 67% | 3 | 33% | 3 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 |
|---|---|---|---|
| Mar 24, 12:22 PM MDT | Red Flag Warning | TFX | 9 hr |
| May 17, 3:54 AM MDT | Areal Flood Advisory | TFX | 47 hr |
| May 17, 2:45 PM MDT | Fire Weather Watch | TFX | 13 hr |
| May 18, 4:00 AM MDT | Red Flag Warning | TFX | 17 hr |
| May 19, 5:23 AM MDT | Areal Flood Advisory | TFX | 12 hr |
| May 19, 5:59 PM MDT | Areal Flood Advisory | TFX | 23 hr |
| May 23, 4:32 AM MDT | Areal Flood Advisory | TFX | 10 hr |
| May 23, 2:24 PM MDT | Areal Flood Warning | TFX | 21 hr |
| May 24, 11:27 AM MDT | Areal Flood Warning | TFX | 6 days |
| Jul 4, 1:03 PM MDT | Severe Thunderstorm Warning | TFX | 27 min |
| Jul 4, 1:45 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jul 4, 2:04 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 4, 4:57 PM MDT | Severe Thunderstorm Warning | TFX | 48 min |
| Jul 4, 5:13 PM MDT | Severe Thunderstorm Warning | TFX | 47 min |
| Jul 4, 5:45 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jul 4, 5:52 PM MDT | Severe Thunderstorm Warning | TFX | 38 min |
| Jul 4, 6:12 PM MDT | Severe Thunderstorm Warning | TFX | 48 min |
| Jul 4, 6:29 PM MDT | Severe Thunderstorm Warning | TFX | 31 min |
| Jul 26, 8:55 AM MDT | Severe Thunderstorm Warning | TFX | 50 min |
| Jul 27, 9:23 AM MDT | Red Flag Warning | TFX | 12 hr |
| Jul 29, 4:27 AM MDT | Fire Weather Watch | TFX | 10 hr |
| Jul 29, 2:08 PM MDT | Red Flag Warning | TFX | 31 hr |
| Jul 31, 4:19 AM MDT | Fire Weather Watch | TFX | 16 hr |
| Jul 31, 12:35 PM MDT | Red Flag Warning | TFX | 7 hr |
| Jul 31, 8:25 PM MDT | Red Flag Warning | TFX | 25 hr |
| Aug 9, 12:16 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 9, 3:31 PM MDT | Severe Thunderstorm Warning | TFX | 59 min |
| Aug 9, 5:50 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Aug 17, 1:54 PM MDT | Red Flag Warning | MSO | 54 hr |
| Aug 18, 6:17 AM MDT | Fire Weather Watch | TFX | 23 hr |
| Aug 18, 2:46 PM MDT | Fire Weather Watch | MSO | 13 hr |
| Aug 19, 5:43 AM MDT | Red Flag Warning | TFX | 14 hr |
| Aug 19, 1:31 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 19, 2:32 PM MDT | Severe Thunderstorm Warning | TFX | 43 min |
| Aug 23, 2:16 PM MDT | Fire Weather Watch | TFX | 14 hr |
| Aug 24, 4:08 AM MDT | Fire Weather Watch | TFX | 17 hr |
| Aug 24, 2:44 PM MDT | Red Flag Warning | TFX | 6 hr |
| Aug 24, 9:08 PM MDT | Red Flag Warning | TFX | 27 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 | 9 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 3 |
| Flooding | |
| Areal Flood Warning | 2 |
| Areal Flood Advisory | 4 |
| Fire | |
| Red Flag Warning | 10 |
| Fire Weather Watch | 7 |
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.