Alert archive / Montana / Blaine County
Weather alerts in Blaine County, Montana, 2011
91 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Blaine County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 91
- Warnings
- 33
- Watches
- 14
- Advisories
- 5
- Busiest month
- July38 alerts
- Busiest day
- July 14, 20119 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Blaine County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 13 | 4 | 69% | 1 | 0% | |
| Flash flood warnings | 3 | 0 | 100% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Great Falls, MT: severe thunderstorm warnings | 58 | 26 | 55% | 71 | 52% | 18 min |
| NWS Great Falls, MT: flash flood warnings | 6 | 1 | 83% | 2 | 50% | 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 15, 3:53 PM MDT | Areal Flood Advisory | TFX | 46 hr |
| Mar 17, 10:14 AM MDT | Areal Flood Warning | TFX | 4 days |
| Apr 6, 10:15 AM MDT | Areal Flood Advisory | TFX | 10 days |
| Apr 7, 3:58 PM MDT | Areal Flood Advisory | TFX | 11 days |
| Apr 12, 11:01 AM MDT | River Flood Warning | TFX | 12 days |
| Apr 22, 10:44 AM MDT | Areal Flood Warning | TFX | 23 hr |
| Apr 22, 10:52 AM MDT | Flash Flood Warning | TFX | 54 hr |
| Apr 23, 10:01 AM MDT | Areal Flood Advisory | TFX | 48 hr |
| May 21, 3:25 PM MDT | Areal Flood Warning | TFX | 48 hr |
| May 22, 8:21 AM MDT | Areal Flood Warning | TFX | 36 days |
| Jun 1, 11:27 PM MDT | Special Weather Statement | TFX | 63 min |
| Jun 1, 11:45 PM MDT | Severe Thunderstorm Warning | TFX | 50 min |
| Jun 2, 12:51 AM MDT | Special Weather Statement | TFX | 54 min |
| Jun 2, 1:59 AM MDT | Special Weather Statement | TFX | 76 min |
| Jun 2, 7:09 AM MDT | Special Weather Statement | TFX | 51 min |
| Jun 2, 7:31 AM MDT | Severe Thunderstorm Warning | TFX | 44 min |
| Jun 2, 12:54 PM MDT | Special Weather Statement | TFX | 51 min |
| Jun 2, 1:25 PM MDT | Special Weather Statement | TFX | 35 min |
| Jun 5, 9:49 AM MDT | River Flood Warning | TFX | 13 days |
| Jun 15, 5:07 PM MDT | Special Weather Statement | TFX | 38 min |
| Jun 23, 12:55 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 23, 4:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 23, 6:18 PM MDT | Severe Thunderstorm Warning | TFX | 57 min |
| Jun 23, 7:16 PM MDT | Special Weather Statement | TFX | 44 min |
| Jun 28, 8:40 PM MDT | Special Weather Statement | TFX | 50 min |
| Jun 28, 9:29 PM MDT | Special Weather Statement | TFX | 46 min |
| Jun 29, 12:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jun 29, 3:46 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 29, 6:01 PM MDT | Special Weather Statement | TFX | 44 min |
| Jun 29, 6:08 PM MDT | Special Weather Statement | TFX | 52 min |
| Jun 29, 6:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jun 29, 6:21 PM MDT | Severe Thunderstorm Warning | TFX | 27 min |
| Jul 3, 12:31 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 3, 4:08 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 3, 6:29 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 3:51 PM MDT | Special Weather Statement | TFX | 54 min |
| Jul 7, 5:37 PM MDT | Special Weather Statement | TFX | 53 min |
| Jul 7, 7:08 PM MDT | Special Weather Statement | TFX | 37 min |
| Jul 7, 7:14 PM MDT | Flash Flood Warning | TFX | 3 hr |
| Jul 7, 9:08 PM MDT | Severe Thunderstorm Warning | TFX | 52 min |
| Jul 7, 10:23 PM MDT | Special Weather Statement | TFX | 52 min |
| Jul 7, 10:58 PM MDT | Special Weather Statement | TFX | 47 min |
| Jul 12, 1:38 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 12, 5:30 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jul 12, 6:48 PM MDT | Special Weather Statement | TFX | 57 min |
| Jul 12, 7:17 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 13, 1:45 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 13, 5:13 PM MDT | Mesoscale Discussion | SPC | 62 min |
| Jul 13, 5:39 PM MDT | Special Weather Statement | TFX | 51 min |
| Jul 13, 6:08 PM MDT | Severe Thunderstorm Warning | TFX | 37 min |
| Jul 13, 6:40 PM MDT | Areal Flood Advisory | TFX | 5 hr |
| Jul 13, 6:54 PM MDT | Flash Flood Warning | TFX | 5 hr |
| Jul 13, 7:33 PM MDT | Mesoscale Discussion | SPC | 57 min |
| Jul 13, 8:24 PM MDT | Special Weather Statement | TFX | 66 min |
| Jul 13, 8:27 PM MDT | Special Weather Statement | TFX | 63 min |
| Jul 13, 9:36 PM MDT | Special Weather Statement | TFX | 54 min |
| Jul 14, 11:04 AM MDT | Mesoscale Discussion | SPC | 116 min |
| Jul 14, 1:56 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 16, 2:23 PM MDT | Severe Thunderstorm Warning | TFX | 52 min |
| Jul 16, 3:15 PM MDT | Severe Thunderstorm Warning | TFX | 15 min |
| Jul 16, 4:14 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jul 16, 6:04 PM MDT | Special Weather Statement | TFX | 41 min |
| Jul 16, 8:57 PM MDT | Severe Thunderstorm Warning | TFX | 63 min |
| Jul 17, 12:45 AM MDT | Severe Thunderstorm Warning | TFX | 30 min |
| Jul 17, 12:51 AM MDT | Severe Thunderstorm Warning | TFX | 39 min |
| Jul 17, 1:29 AM MDT | Severe Thunderstorm Warning | TFX | 16 min |
| Jul 19, 2:49 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jul 19, 3:13 PM MDT | Special Weather Statement | TFX | 47 min |
| Jul 19, 4:02 PM MDT | Special Weather Statement | TFX | 43 min |
| Jul 25, 5:47 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 11, 1:25 PM MDT | Special Weather Statement | TFX | 65 min |
| Aug 11, 2:37 PM MDT | Special Weather Statement | TFX | 53 min |
| Aug 11, 5:36 PM MDT | Severe Thunderstorm Warning | TFX | 39 min |
| Aug 14, 9:26 PM MDT | Red Flag Warning | TFX | 24 hr |
| Aug 16, 3:15 PM MDT | Red Flag Warning | TFX | 30 hr |
| Aug 19, 3:18 PM MDT | Fire Weather Watch | TFX | 48 hr |
| Aug 20, 3:06 PM MDT | Red Flag Warning | TFX | 4 days |
| Aug 24, 2:45 PM MDT | Fire Weather Watch | TFX | 13 hr |
| Aug 25, 4:12 AM MDT | Red Flag Warning | TFX | 17 hr |
| Aug 26, 3:31 PM MDT | Fire Weather Watch | TFX | 13 hr |
| Sep 10, 3:23 AM MDT | Fire Weather Watch | TFX | 24 hr |
| Sep 11, 3:17 AM MDT | Red Flag Warning | TFX | 19 hr |
| Sep 22, 4:00 AM MDT | Red Flag Warning | TFX | 41 hr |
| Sep 24, 6:26 PM MDT | Fire Weather Watch | TFX | 10 hr |
| Sep 25, 4:54 AM MDT | Red Flag Warning | TFX | 17 hr |
| Sep 27, 4:23 AM MDT | Red Flag Warning | TFX | 17 hr |
| Sep 29, 3:38 AM MDT | Red Flag Warning | TFX | 17 hr |
| Sep 30, 8:08 PM MDT | Fire Weather Watch | TFX | 8 hr |
| Oct 1, 4:15 AM MDT | Red Flag Warning | TFX | 17 hr |
| Nov 26, 2:45 PM MST | Fire Weather Watch | TFX | 13 hr |
| Nov 27, 3:48 AM MST | Red Flag Warning | TFX | 24 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 | 13 |
| Severe Thunderstorm Watch | 7 |
| Mesoscale Discussion | 12 |
| Special Weather Statement | 27 |
| Flooding | |
| Areal Flood Warning | 4 |
| Flash Flood Warning | 3 |
| River Flood Warning | 2 |
| Areal Flood Advisory | 5 |
| Fire | |
| Red Flag Warning | 11 |
| Fire Weather Watch | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.