Alert archive / Montana / Park County
Weather alerts in Park County, Montana, 2009
125 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Park County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 125
- Warnings
- 30
- Watches
- 21
- Advisories
- 43
- Busiest month
- July22 alerts
- Busiest day
- July 6, 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.
Park County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 0 | 100% | 2 | 0% | |
| 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 Billings, MT: severe thunderstorm warnings | 85 | 28 | 67% | 63 | 60% | 23 min |
| NWS Billings, MT: flash flood warnings | 8 | 3 | 63% | 8 | 50% | 11 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 |
|---|---|---|---|
| Dec 31, 8:47 PM MST | Winter Storm Warning | BYZ | 55 hr |
| Jan 1, 3:52 AM MST | High Wind Warning | BYZ | 31 hr |
| Jan 3, 3:11 PM MST | High Wind Watch | BYZ | 19 hr |
| Jan 4, 10:20 AM MST | High Wind Warning | BYZ | 35 hr |
| Jan 5, 3:30 PM MST | Winter Storm Watch | BYZ | 13 hr |
| Jan 6, 4:17 AM MST | Winter Storm Warning | BYZ | 35 hr |
| Jan 7, 3:40 PM MST | Wind Advisory | BYZ | 26 hr |
| Jan 9, 4:00 AM MST | High Wind Warning | BYZ | 30 hr |
| Jan 11, 3:32 AM MST | Wind Advisory | BYZ | 16 hr |
| Jan 12, 3:55 PM MST | Wind Advisory | BYZ | 22 hr |
| Jan 24, 4:01 AM MST | Winter Weather Advisory | BYZ | 35 hr |
| Jan 24, 3:24 PM MST | Winter Storm Warning | BYZ | 23 hr |
| Jan 26, 3:46 AM MST | High Wind Watch | BYZ | 12 hr |
| Jan 26, 3:28 PM MST | High Wind Warning | BYZ | 41 hr |
| Jan 29, 3:09 AM MST | Wind Advisory | BYZ | 54 hr |
| Jan 30, 10:50 PM MST | High Wind Warning | BYZ | 10 hr |
| Feb 1, 2:43 PM MST | Wind Advisory | BYZ | 29 hr |
| Feb 4, 8:44 AM MST | Wind Advisory | BYZ | 18 hr |
| Feb 25, 3:43 AM MST | Winter Weather Advisory | BYZ | 24 hr |
| Feb 26, 3:44 AM MST | Winter Storm Warning | BYZ | 32 hr |
| Feb 26, 10:12 AM MST | Winter Weather Advisory | BYZ | 26 hr |
| Mar 4, 8:37 AM MST | Winter Storm Warning | BYZ | 27 hr |
| Mar 5, 3:43 PM MST | Winter Storm Warning | BYZ | 23 hr |
| Mar 5, 3:43 PM MST | Winter Weather Advisory | BYZ | 20 hr |
| Mar 7, 3:16 PM MST | Winter Weather Advisory | BYZ | 61 hr |
| Mar 7, 11:08 PM MST | Wind Advisory | BYZ | 4 hr |
| Mar 14, 3:15 PM MDT | Winter Storm Watch | BYZ | 24 hr |
| Mar 15, 3:12 AM MDT | Wind Advisory | BYZ | 24 hr |
| Mar 15, 3:30 PM MDT | Winter Storm Warning | BYZ | 36 hr |
| Mar 21, 4:29 AM MDT | Winter Storm Watch | BYZ | 35 hr |
| Mar 22, 3:58 PM MDT | Winter Storm Warning | BYZ | 29 hr |
| Mar 22, 3:58 PM MDT | Winter Weather Advisory | BYZ | 18 hr |
| Mar 25, 4:27 AM MDT | Winter Weather Advisory | BYZ | 23 hr |
| Mar 27, 3:11 PM MDT | Winter Storm Watch | BYZ | 22 hr |
| Mar 28, 12:49 PM MDT | Winter Storm Warning | BYZ | 51 hr |
| Apr 2, 4:23 AM MDT | Winter Storm Watch | BYZ | 12 hr |
| Apr 2, 3:53 PM MDT | Winter Storm Warning | BYZ | 50 hr |
| Apr 2, 3:53 PM MDT | Winter Weather Advisory | BYZ | 42 hr |
| Apr 9, 11:19 AM MDT | Winter Storm Warning | BYZ | 7 hr |
| Apr 12, 3:23 PM MDT | Winter Storm Watch | BYZ | 36 hr |
| Apr 13, 3:37 PM MDT | Winter Storm Warning | BYZ | 54 hr |
| Apr 14, 9:41 AM MDT | Winter Weather Advisory | BYZ | 30 hr |
| Apr 22, 2:45 PM MDT | Winter Storm Watch | BYZ | 14 hr |
| Apr 23, 4:26 AM MDT | Winter Storm Warning | BYZ | 30 hr |
| Apr 23, 4:26 AM MDT | Winter Weather Advisory | BYZ | 30 hr |
| Apr 25, 2:28 PM MDT | Winter Weather Advisory | BYZ | 37 hr |
| Apr 26, 4:00 AM MDT | Winter Storm Warning | BYZ | 17 hr |
| Apr 28, 10:40 AM MDT | Winter Storm Warning | BYZ | 23 hr |
| Apr 28, 10:40 AM MDT | Winter Weather Advisory | BYZ | 25 hr |
| May 24, 5:59 PM MDT | Flash Flood Warning | BYZ | 6 hr |
| May 26, 10:32 AM MDT | River Flood Watch | BYZ | 24 hr |
| May 27, 10:04 AM MDT | River Flood Warning | BYZ | 6 days |
| Jun 25, 1:02 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jun 30, 2:35 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jun 30, 3:37 PM MDT | Special Weather Statement | BYZ | 38 min |
| Jun 30, 5:11 PM MDT | Special Weather Statement | BYZ | 49 min |
| Jul 2, 3:15 PM MDT | Special Weather Statement | BYZ | 45 min |
| Jul 2, 3:41 PM MDT | Mesoscale Discussion | SPC | 34 min |
| Jul 2, 4:12 PM MDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 2, 6:59 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jul 3, 6:27 PM MDT | Special Weather Statement | BYZ | 33 min |
| Jul 4, 4:14 PM MDT | Special Weather Statement | BYZ | 31 min |
| Jul 6, 1:05 PM MDT | Mesoscale Discussion | SPC | 55 min |
| Jul 6, 1:30 PM MDT | Special Weather Statement | BYZ | 45 min |
| Jul 6, 1:33 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 2:16 PM MDT | Special Weather Statement | BYZ | 59 min |
| Jul 6, 4:02 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 6, 4:31 PM MDT | Special Weather Statement | BYZ | 44 min |
| Jul 6, 6:23 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jul 12, 4:06 PM MDT | Special Weather Statement | BYZ | 24 min |
| Jul 12, 4:33 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 4:53 PM MDT | Severe Thunderstorm Warning | BYZ | 25 min |
| Jul 12, 7:13 PM MDT | Special Weather Statement | BYZ | 62 min |
| Jul 13, 1:02 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 24, 1:17 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 25, 12:40 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jul 26, 5:30 PM MDT | Special Weather Statement | BYZ | 60 min |
| Jul 28, 7:37 AM MDT | Dense Fog Advisory | BYZ | 2 hr |
| Aug 6, 2:39 PM MDT | Special Weather Statement | BYZ | 51 min |
| Aug 6, 2:58 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 6, 6:28 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Aug 7, 11:50 AM MDT | Mesoscale Discussion | SPC | 115 min |
| Aug 13, 2:39 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 13, 3:59 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 14, 1:03 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Aug 14, 2:01 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 14, 2:22 PM MDT | Special Weather Statement | BYZ | 53 min |
| Aug 14, 2:32 PM MDT | Severe Thunderstorm Warning | BYZ | 52 min |
| Aug 22, 1:31 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 22, 3:37 PM MDT | Special Weather Statement | BYZ | 83 min |
| Sep 4, 3:37 PM MDT | Fire Weather Watch | BYZ | 37 hr |
| Sep 6, 4:46 AM MDT | Red Flag Warning | BYZ | 16 hr |
| Sep 18, 3:19 AM MDT | Fire Weather Watch | BYZ | 36 hr |
| Sep 25, 2:56 PM MDT | Red Flag Warning | BYZ | 31 hr |
| Sep 28, 2:18 PM MDT | Red Flag Warning | BYZ | 31 hr |
| Oct 2, 2:48 PM MDT | Winter Storm Watch | BYZ | 49 hr |
| Oct 3, 3:54 PM MDT | Winter Storm Warning | BYZ | 54 hr |
| Oct 4, 9:25 AM MDT | Mesoscale Discussion | SPC | 5 hr |
| Oct 5, 1:44 AM MDT | Mesoscale Discussion | SPC | 5 hr |
| Oct 8, 4:07 AM MDT | Winter Weather Advisory | BYZ | 35 hr |
| Oct 25, 1:57 PM MDT | Wind Advisory | BYZ | 36 hr |
| Oct 29, 3:21 PM MDT | Wind Advisory | BYZ | 54 hr |
| Nov 5, 3:05 PM MST | Wind Advisory | BYZ | 24 hr |
| Nov 11, 4:29 AM MST | Winter Storm Watch | BYZ | 5 hr |
| Nov 11, 9:37 AM MST | Winter Storm Warning | BYZ | 35 hr |
| Nov 15, 4:46 PM MST | Wind Advisory | BYZ | 41 hr |
| Nov 22, 10:03 AM MST | Winter Weather Advisory | BYZ | 11 hr |
| Nov 25, 2:59 PM MST | Wind Advisory | BYZ | 22 hr |
| Nov 30, 8:56 AM MST | Wind Advisory | BYZ | 13 hr |
| Nov 30, 3:25 PM MST | Winter Weather Advisory | BYZ | 24 hr |
| Dec 3, 2:38 PM MST | Winter Weather Advisory | BYZ | 13 hr |
| Dec 4, 3:22 AM MST | Wind Advisory | BYZ | 14 hr |
| Dec 4, 3:45 PM MST | Winter Weather Advisory | BYZ | 36 hr |
| Dec 6, 6:06 PM MST | Wind Chill Advisory | BYZ | 9 hr |
| Dec 8, 2:24 PM MST | Wind Chill Advisory | BYZ | 21 hr |
| Dec 9, 2:53 PM MST | Wind Chill Advisory | BYZ | 12 hr |
| Dec 11, 6:45 AM MST | Wind Advisory | BYZ | 4 hr |
| Dec 11, 2:58 PM MST | Winter Storm Watch | BYZ | 24 hr |
| Dec 11, 5:28 PM MST | Wind Advisory | BYZ | 18 hr |
| Dec 12, 2:57 PM MST | Winter Weather Advisory | BYZ | 50 hr |
| Dec 13, 4:41 AM MST | Winter Storm Warning | BYZ | 32 hr |
| Dec 15, 2:29 AM MST | Winter Weather Advisory | BYZ | 20 hr |
| Dec 15, 11:06 PM MST | Wind Advisory | BYZ | 17 hr |
| Dec 19, 5:31 PM MST | Wind Advisory | BYZ | 3 hr |
| Dec 22, 4:17 AM MST | Winter Weather Advisory | BYZ | 41 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 | 2 |
| Severe Thunderstorm Watch | 6 |
| Mesoscale Discussion | 17 |
| Special Weather Statement | 14 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 1 |
| River Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 18 |
| Winter Storm Watch | 10 |
| Winter Weather Advisory | 20 |
| Cold | |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 2 |
| Wind Advisory | 19 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
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.