Alert archive / Montana / Chouteau County
Weather alerts in Chouteau County, Montana, 2010
59 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Chouteau County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 59
- Warnings
- 21
- Watches
- 5
- Advisories
- 8
- Busiest month
- August20 alerts
- Busiest day
- June 29, 20104 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Chouteau County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 13 | 7% | 7 | 100% | 20 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Great Falls, MT: severe thunderstorm warnings | 68 | 40 | 41% | 96 | 67% | 21 min |
| NWS Great Falls, MT: flash flood warnings | 2 | 1 | 50% | 1 | 100% | 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 12, 11:02 AM MST | Areal Flood Advisory | TFX | 49 hr |
| Jan 14, 1:00 PM MST | Areal Flood Advisory | TFX | 24 hr |
| Jan 15, 1:10 PM MST | Areal Flood Advisory | TFX | 4 days |
| Mar 29, 10:20 AM MDT | Red Flag Warning | TFX | 9 hr |
| Apr 7, 2:39 PM MDT | Red Flag Warning | TFX | 53 hr |
| Apr 13, 6:55 AM MDT | Mesoscale Discussion | SPC | 4 hr |
| May 14, 10:49 AM MDT | Areal Flood Advisory | TFX | 7 days |
| May 18, 3:57 PM MDT | Severe Thunderstorm Warning | TFX | 48 min |
| May 21, 10:12 AM MDT | Areal Flood Warning | TFX | 48 hr |
| May 21, 10:21 AM MDT | Areal Flood Advisory | TFX | 5 days |
| May 23, 9:59 AM MDT | Areal Flood Warning | TFX | 71 hr |
| May 27, 2:35 PM MDT | Mesoscale Discussion | SPC | 115 min |
| May 27, 4:03 PM MDT | Special Weather Statement | TFX | 42 min |
| Jun 15, 3:05 PM MDT | Severe Thunderstorm Warning | TFX | 40 min |
| Jun 15, 3:40 PM MDT | Severe Thunderstorm Warning | TFX | 50 min |
| Jun 15, 3:50 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jun 15, 6:29 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jun 17, 9:51 AM MDT | Areal Flood Advisory | TFX | 9 days |
| Jun 20, 4:44 PM MDT | Severe Thunderstorm Warning | TFX | 46 min |
| Jun 20, 5:25 PM MDT | Severe Thunderstorm Warning | TFX | 65 min |
| Jun 29, 2:31 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 29, 4:57 PM MDT | Severe Thunderstorm Warning | TFX | 48 min |
| Jun 29, 5:40 PM MDT | Severe Thunderstorm Warning | TFX | 29 min |
| Jun 29, 5:46 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jul 1, 12:45 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jul 1, 1:37 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 1, 4:57 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jul 1, 5:36 PM MDT | Special Weather Statement | TFX | 39 min |
| Jul 1, 6:16 PM MDT | Severe Thunderstorm Warning | TFX | 44 min |
| Jul 2, 8:29 AM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 2, 9:16 AM MDT | Severe Thunderstorm Warning | TFX | 44 min |
| Jul 19, 7:55 PM MDT | Severe Thunderstorm Warning | TFX | 50 min |
| Jul 19, 8:39 PM MDT | Severe Thunderstorm Warning | TFX | 51 min |
| Jul 31, 1:19 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 31, 5:02 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 31, 6:07 PM MDT | Special Weather Statement | TFX | 38 min |
| Aug 1, 1:23 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 1, 4:19 PM MDT | Special Weather Statement | TFX | 56 min |
| Aug 2, 8:54 PM MDT | Severe Thunderstorm Warning | TFX | 51 min |
| Aug 6, 3:03 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 6, 6:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Aug 6, 6:49 PM MDT | Severe Thunderstorm Warning | TFX | 41 min |
| Aug 6, 7:26 PM MDT | Special Weather Statement | TFX | 49 min |
| Aug 6, 8:14 PM MDT | Special Weather Statement | TFX | 46 min |
| Aug 9, 6:43 PM MDT | Special Weather Statement | TFX | 47 min |
| Aug 11, 4:10 PM MDT | Severe Thunderstorm Warning | TFX | 65 min |
| Aug 11, 5:46 PM MDT | Special Weather Statement | TFX | 29 min |
| Aug 11, 6:28 PM MDT | Special Weather Statement | TFX | 62 min |
| Aug 11, 8:31 PM MDT | Special Weather Statement | TFX | 44 min |
| Aug 20, 2:46 PM MDT | Red Flag Warning | TFX | 30 hr |
| Aug 22, 9:08 PM MDT | Areal Flood Advisory | TFX | 6 hr |
| Aug 24, 2:22 PM MDT | Fire Weather Watch | TFX | 24 hr |
| Aug 25, 2:46 PM MDT | Red Flag Warning | TFX | 33 hr |
| Aug 27, 11:43 AM MDT | Red Flag Warning | TFX | 8 hr |
| Aug 30, 12:06 PM MDT | Areal Flood Advisory | TFX | 9 hr |
| Sep 4, 2:19 PM MDT | Special Weather Statement | TFX | 41 min |
| Sep 4, 5:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 4, 5:26 PM MDT | Special Weather Statement | TFX | 64 min |
| Sep 20, 3:53 AM MDT | Special Weather Statement | TFX | 52 min |
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 | 14 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 12 |
| Special Weather Statement | 13 |
| Flooding | |
| Areal Flood Warning | 2 |
| Areal Flood Advisory | 8 |
| Fire | |
| Red Flag Warning | 5 |
| Fire Weather Watch | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
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.