Alert archive / Montana / Daniels County
Weather alerts in Daniels County, Montana, 2009
85 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Daniels County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 85
- Warnings
- 26
- Watches
- 16
- Advisories
- 32
- Busiest month
- July18 alerts
- Busiest day
- August 24, 20096 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 2 tornado warnings covering Daniels County in 2009 had a tornado report inside them.
Daniels County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 10 | 8 | 20% | 8 | 88% | 45 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Glasgow, MT: tornado warnings | 18 | 2 | 89% | 7 | 43% | 13 min |
| NWS Glasgow, MT: severe thunderstorm warnings | 105 | 58 | 45% | 157 | 68% | 27 min |
| NWS Glasgow, MT: flash flood warnings | 4 | 0 | 100% | 0 |
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, 1:48 AM MST | Winter Weather Advisory | GGW | 8 hr |
| Jan 1, 9:24 PM MST | Winter Weather Advisory | GGW | 37 hr |
| Jan 3, 3:55 AM MST | Wind Chill Advisory | GGW | 15 hr |
| Jan 7, 3:48 AM MST | Winter Storm Watch | GGW | 24 hr |
| Jan 8, 3:18 AM MST | Winter Storm Warning | GGW | 32 hr |
| Jan 10, 2:45 PM MST | High Wind Watch | GGW | 24 hr |
| Jan 11, 4:07 AM MST | Blizzard Warning | GGW | 24 hr |
| Jan 13, 2:50 PM MST | Wind Chill Advisory | GGW | 13 hr |
| Jan 13, 2:50 PM MST | Winter Weather Advisory | GGW | 8 hr |
| Jan 16, 7:43 PM MST | Winter Weather Advisory | GGW | 4 hr |
| Jan 22, 3:40 AM MST | Wind Chill Advisory | GGW | 37 hr |
| Jan 22, 12:09 PM MST | Winter Weather Advisory | GGW | 15 hr |
| Jan 26, 9:17 PM MST | Wind Chill Advisory | GGW | 13 hr |
| Jan 31, 4:02 AM MST | High Wind Warning | GGW | 8 hr |
| Feb 9, 7:32 AM MST | Dense Fog Advisory | GGW | 5 hr |
| Feb 10, 8:14 AM MST | Winter Weather Advisory | GGW | 10 hr |
| Feb 17, 3:27 AM MST | Dense Fog Advisory | GGW | 8 hr |
| Feb 19, 2:58 PM MST | Winter Weather Advisory | GGW | 13 hr |
| Feb 23, 2:57 PM MST | Winter Weather Advisory | GGW | 22 hr |
| Feb 25, 3:22 AM MST | Winter Weather Advisory | GGW | 56 hr |
| Feb 26, 2:58 PM MST | Wind Chill Advisory | GGW | 20 hr |
| Mar 3, 10:37 PM MST | Freezing Rain Advisory | GGW | 5 hr |
| Mar 4, 9:20 PM MST | Dense Fog Advisory | GGW | 10 hr |
| Mar 8, 2:34 PM MDT | Wind Chill Advisory | GGW | 54 hr |
| Mar 21, 11:20 AM MDT | Areal Flood Advisory | GGW | 24 hr |
| Apr 22, 8:05 AM MDT | Red Flag Warning | GGW | 12 hr |
| Apr 27, 2:45 PM MDT | Winter Storm Watch | GGW | 24 hr |
| Apr 28, 2:46 PM MDT | Winter Storm Warning | GGW | 36 hr |
| Apr 29, 4:08 AM MDT | Winter Weather Advisory | GGW | 23 hr |
| May 19, 8:53 PM MDT | Severe Thunderstorm Warning | GGW | 67 min |
| Jun 24, 3:21 PM MDT | Red Flag Warning | GGW | 5 hr |
| Jun 25, 3:50 AM MDT | Red Flag Warning | GGW | 17 hr |
| Jun 29, 5:28 PM MDT | Severe Thunderstorm Warning | GGW | 62 min |
| Jun 29, 6:19 PM MDT | Severe Thunderstorm Warning | GGW | 56 min |
| Jul 3, 2:21 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jul 3, 4:31 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 3, 4:37 PM MDT | Severe Thunderstorm Warning | GGW | 53 min |
| Jul 3, 5:27 PM MDT | Severe Thunderstorm Warning | GGW | 63 min |
| Jul 3, 6:22 PM MDT | Severe Thunderstorm Warning | GGW | 53 min |
| Jul 5, 3:41 PM MDT | Severe Thunderstorm Warning | GGW | 64 min |
| Jul 5, 3:48 PM MDT | Mesoscale Discussion | SPC | 57 min |
| Jul 6, 7:23 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 6, 9:44 PM MDT | Severe Thunderstorm Warning | GGW | 61 min |
| Jul 6, 10:30 PM MDT | Mesoscale Discussion | SPC | 60 min |
| Jul 8, 10:28 AM MDT | Flash Flood Watch | GGW | 9 hr |
| Jul 8, 10:38 AM MDT | Mesoscale Discussion | SPC | 97 min |
| Jul 13, 5:05 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 13, 6:11 PM MDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 17, 2:54 PM MDT | Fire Weather Watch | GGW | 24 hr |
| Jul 18, 2:58 PM MDT | Red Flag Warning | GGW | 30 hr |
| Jul 22, 2:52 PM MDT | Fire Weather Watch | GGW | 13 hr |
| Jul 23, 3:57 AM MDT | Red Flag Warning | GGW | 17 hr |
| Aug 14, 5:10 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Aug 14, 8:00 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 14, 10:47 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Aug 23, 7:02 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Aug 23, 7:55 PM MDT | Tornado Watch | SPC | 5 hr |
| Aug 23, 9:03 PM MDT | Tornado Warning | GGW | 42 min |
| Aug 23, 9:28 PM MDT | Severe Thunderstorm Warning | GGW | 30 min |
| Aug 23, 9:41 PM MDT | Tornado Warning | GGW | 40 min |
| Aug 23, 10:20 PM MDT | Flash Flood Warning | GGW | 3 hr |
| Sep 8, 2:44 PM MDT | Red Flag Warning | GGW | 28 hr |
| Sep 13, 1:44 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Sep 13, 2:35 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 13, 6:29 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Sep 13, 9:52 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Sep 14, 1:32 AM MDT | Severe Thunderstorm Warning | GGW | 58 min |
| Sep 18, 4:05 AM MDT | Fire Weather Watch | GGW | 23 hr |
| Sep 19, 3:31 AM MDT | Red Flag Warning | GGW | 20 hr |
| Sep 24, 8:05 PM MDT | Fire Weather Watch | GGW | 19 hr |
| Sep 25, 3:00 PM MDT | Red Flag Warning | GGW | 30 hr |
| Nov 29, 6:40 AM MST | Dense Fog Advisory | GGW | 2 hr |
| Dec 9, 2:55 PM MST | Wind Chill Advisory | GGW | 18 hr |
| Dec 11, 3:06 PM MST | Winter Storm Watch | GGW | 13 hr |
| Dec 12, 4:19 AM MST | Wind Chill Warning | GGW | 24 hr |
| Dec 14, 4:25 PM MST | Wind Chill Advisory | GGW | 12 hr |
| Dec 15, 11:15 AM MST | Wind Chill Advisory | GGW | 105 min |
| Dec 15, 1:05 PM MST | Wind Chill Advisory | GGW | 105 min |
| Dec 18, 6:32 PM MST | Dense Fog Advisory | GGW | 15 hr |
| Dec 20, 3:51 PM MST | Winter Weather Advisory | GGW | 22 hr |
| Dec 22, 3:44 AM MST | Winter Storm Watch | GGW | 23 hr |
| Dec 23, 3:01 AM MST | Winter Weather Advisory | GGW | 17 hr |
| Dec 23, 3:14 PM MST | Wind Chill Advisory | GGW | 68 hr |
| Dec 28, 9:23 AM MST | Dense Fog Advisory | GGW | 4 hr |
| Dec 30, 2:21 PM MST | Wind Chill Advisory | GGW | 20 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 | 10 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 11 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 4 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 12 |
| Cold | |
| Wind Chill Warning | 1 |
| Wind Chill Advisory | 12 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Fire | |
| Red Flag Warning | 8 |
| Fire Weather Watch | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.