Alert archive / Montana / Park County
Weather alerts in Park County, Montana, 2011
140 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 140
- Warnings
- 39
- Watches
- 31
- Advisories
- 42
- Busiest month
- July23 alerts
- Busiest day
- July 6, 20114 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 1 tornado reports fell inside a warning.
Park County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 1 | 0% | |||
| Severe thunderstorm warnings | 1 | 0 | 100% | 2 | 0% | |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Billings, MT: tornado warnings | 13 | 5 | 62% | 8 | 75% | 21 min |
| NWS Billings, MT: severe thunderstorm warnings | 171 | 76 | 56% | 190 | 74% | 21 min |
| NWS Billings, MT: flash flood warnings | 21 | 5 | 76% | 7 | 100% | 40 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, 8:39 PM MST | Wind Chill Advisory | BYZ | 14 hr |
| Jan 1, 3:46 AM MST | Winter Weather Advisory | BYZ | 49 hr |
| Jan 4, 4:01 AM MST | Wind Advisory | BYZ | 59 hr |
| Jan 6, 6:54 PM MST | Wind Advisory | BYZ | 2 hr |
| Jan 12, 8:07 AM MST | Wind Advisory | BYZ | 21 hr |
| Jan 15, 3:00 PM MST | High Wind Watch | BYZ | 12 hr |
| Jan 16, 3:07 AM MST | Wind Advisory | BYZ | 20 hr |
| Jan 18, 4:09 AM MST | Winter Storm Warning | BYZ | 32 hr |
| Jan 18, 4:09 AM MST | Winter Weather Advisory | BYZ | 32 hr |
| Jan 19, 2:56 PM MST | Blizzard Watch | BYZ | 12 hr |
| Jan 20, 3:06 AM MST | Blizzard Warning | BYZ | 24 hr |
| Jan 21, 2:18 PM MST | Wind Advisory | BYZ | 13 hr |
| Jan 22, 3:26 PM MST | Wind Advisory | BYZ | 25 hr |
| Jan 27, 3:59 AM MST | Wind Advisory | BYZ | 31 hr |
| Jan 28, 3:17 PM MST | Winter Weather Advisory | BYZ | 60 hr |
| Jan 31, 3:33 AM MST | Wind Chill Advisory | BYZ | 25 hr |
| Feb 1, 11:08 PM MST | Wind Chill Advisory | BYZ | 11 hr |
| Feb 3, 2:55 PM MST | Wind Advisory | BYZ | 30 hr |
| Feb 4, 2:51 PM MST | Winter Storm Warning | BYZ | 24 hr |
| Feb 5, 3:10 PM MST | Winter Storm Watch | BYZ | 24 hr |
| Feb 6, 3:08 PM MST | Winter Storm Warning | BYZ | 33 hr |
| Feb 10, 1:47 PM MST | High Wind Watch | BYZ | 38 hr |
| Feb 11, 3:46 AM MST | High Wind Warning | BYZ | 62 hr |
| Feb 14, 4:35 AM MST | High Wind Watch | BYZ | 10 hr |
| Feb 14, 2:20 PM MST | Wind Advisory | BYZ | 31 hr |
| Feb 19, 3:47 AM MST | Winter Weather Advisory | BYZ | 38 hr |
| Feb 26, 2:47 AM MST | Wind Chill Advisory | BYZ | 8 hr |
| Feb 27, 10:05 AM MST | Wind Advisory | BYZ | 12 hr |
| Feb 27, 10:30 PM MST | High Wind Warning | BYZ | 25 hr |
| Mar 9, 2:25 PM MST | Wind Advisory | BYZ | 31 hr |
| Mar 14, 2:19 AM MDT | Wind Advisory | BYZ | 10 hr |
| Mar 15, 10:49 PM MDT | Wind Advisory | BYZ | 5 hr |
| Mar 16, 3:59 AM MDT | Winter Storm Warning | BYZ | 23 hr |
| Mar 21, 3:02 PM MDT | Winter Weather Advisory | BYZ | 38 hr |
| Mar 22, 6:25 AM MDT | Winter Storm Warning | BYZ | 23 hr |
| Mar 29, 3:23 AM MDT | Winter Storm Watch | BYZ | 12 hr |
| Mar 29, 3:17 PM MDT | Winter Storm Warning | BYZ | 60 hr |
| Apr 4, 10:47 AM MDT | Wind Advisory | BYZ | 22 hr |
| Apr 5, 2:55 AM MDT | Winter Storm Warning | BYZ | 18 hr |
| Apr 6, 3:40 PM MDT | Winter Storm Watch | BYZ | 12 hr |
| Apr 6, 3:40 PM MDT | Winter Storm Warning | BYZ | 53 hr |
| Apr 17, 4:34 AM MDT | Winter Storm Watch | BYZ | 34 hr |
| Apr 18, 4:34 AM MDT | Winter Storm Warning | BYZ | 35 hr |
| Apr 20, 3:25 PM MDT | Winter Storm Watch | BYZ | 12 hr |
| Apr 21, 3:28 AM MDT | Winter Storm Warning | BYZ | 38 hr |
| May 7, 3:31 PM MDT | Winter Storm Watch | BYZ | 12 hr |
| May 8, 3:40 AM MDT | Winter Storm Warning | BYZ | 62 hr |
| May 10, 2:31 AM MDT | Areal Flood Warning | BYZ | 11 hr |
| May 10, 9:54 AM MDT | Areal Flood Warning | BYZ | 32 hr |
| May 11, 5:58 PM MDT | Areal Flood Advisory | BYZ | 15 hr |
| May 14, 9:43 AM MDT | Areal Flood Warning | BYZ | 3 days |
| May 14, 5:05 PM MDT | Areal Flood Warning | BYZ | 69 hr |
| May 17, 3:35 PM MDT | Flood Watch | BYZ | 5 days |
| May 18, 3:18 AM MDT | Winter Storm Watch | BYZ | 24 hr |
| May 19, 3:14 AM MDT | Winter Storm Warning | BYZ | 3 days |
| May 23, 9:52 AM MDT | Flood Watch | BYZ | 48 hr |
| May 23, 10:06 AM MDT | River Flood Warning | BYZ | 3 days |
| May 26, 2:15 PM MDT | Areal Flood Warning | BYZ | 20 hr |
| May 27, 3:48 AM MDT | Flood Watch | BYZ | 4 days |
| May 28, 3:52 AM MDT | Winter Storm Watch | BYZ | 24 hr |
| May 29, 3:49 AM MDT | Winter Storm Warning | BYZ | 40 hr |
| Jun 1, 9:27 PM MDT | Wind Advisory | BYZ | 24 hr |
| Jun 3, 4:03 PM MDT | River Flood Watch | BYZ | 4 days |
| Jun 3, 4:03 PM MDT | River Flood Watch | BYZ | 7 days |
| Jun 6, 2:13 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 4:45 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 6, 5:46 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 15, 1:22 PM MDT | River Flood Watch | BYZ | 48 hr |
| Jun 22, 3:37 PM MDT | River Flood Warning | BYZ | 18 days |
| Jun 23, 4:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 29, 4:11 PM MDT | Wind Advisory | BYZ | 5 hr |
| 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, 5:11 PM MDT | Special Weather Statement | BYZ | 49 min |
| Jul 3, 7:39 PM MDT | Special Weather Statement | BYZ | 51 min |
| Jul 4, 6:58 PM MDT | Special Weather Statement | BYZ | 62 min |
| Jul 6, 2:19 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 4:25 PM MDT | Special Weather Statement | BYZ | 50 min |
| Jul 6, 5:28 PM MDT | Special Weather Statement | BYZ | 62 min |
| Jul 6, 5:37 PM MDT | Flash Flood Warning | BYZ | 3 hr |
| Jul 6, 6:08 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| Jul 7, 2:29 PM MDT | Special Weather Statement | BYZ | 61 min |
| Jul 8, 1:38 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jul 8, 3:17 PM MDT | Special Weather Statement | BYZ | 58 min |
| Jul 11, 2:53 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jul 12, 12:56 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jul 12, 1:12 PM MDT | Special Weather Statement | BYZ | 63 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 13, 2:49 PM MDT | Special Weather Statement | BYZ | 56 min |
| Jul 14, 1:56 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 15, 2:39 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 2:57 PM MDT | Special Weather Statement | BYZ | 63 min |
| Jul 25, 6:48 PM MDT | Special Weather Statement | BYZ | 57 min |
| Aug 1, 7:16 PM MDT | Special Weather Statement | BYZ | 59 min |
| Aug 1, 8:07 PM MDT | Special Weather Statement | BYZ | 53 min |
| Aug 15, 1:38 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 21, 2:43 PM MDT | Special Weather Statement | BYZ | 62 min |
| Aug 21, 3:32 PM MDT | Special Weather Statement | BYZ | 58 min |
| Aug 24, 2:32 PM MDT | Fire Weather Watch | BYZ | 13 hr |
| Aug 25, 3:04 AM MDT | Red Flag Warning | BYZ | 18 hr |
| Aug 26, 3:54 PM MDT | Mesoscale Discussion | SPC | 96 min |
| Aug 26, 4:26 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 30, 3:26 PM MDT | Red Flag Warning | BYZ | 30 hr |
| Aug 31, 2:20 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Sep 19, 2:23 AM MDT | Red Flag Warning | BYZ | 19 hr |
| Sep 25, 2:45 AM MDT | Red Flag Warning | BYZ | 19 hr |
| Sep 27, 3:18 AM MDT | Red Flag Warning | BYZ | 18 hr |
| Sep 29, 3:05 PM MDT | Fire Weather Watch | BYZ | 14 hr |
| Sep 29, 3:05 PM MDT | Red Flag Warning | BYZ | 30 hr |
| Sep 30, 4:04 AM MDT | Red Flag Warning | BYZ | 41 hr |
| Oct 2, 3:29 AM MDT | Red Flag Warning | BYZ | 18 hr |
| Oct 28, 9:15 PM MDT | Wind Advisory | BYZ | 13 hr |
| Nov 2, 1:29 PM MDT | Wind Advisory | BYZ | 26 hr |
| Nov 8, 8:52 PM MST | High Wind Watch | BYZ | 18 hr |
| Nov 9, 3:14 PM MST | Wind Advisory | BYZ | 66 hr |
| Nov 12, 3:46 PM MST | Wind Advisory | BYZ | 50 hr |
| Nov 15, 3:51 PM MST | High Wind Watch | BYZ | 12 hr |
| Nov 16, 3:43 AM MST | High Wind Warning | BYZ | 37 hr |
| Nov 16, 3:05 PM MST | Winter Storm Watch | BYZ | 38 hr |
| Nov 17, 3:46 AM MST | Winter Storm Warning | BYZ | 49 hr |
| Nov 17, 3:37 PM MST | Winter Weather Advisory | BYZ | 48 hr |
| Nov 21, 3:46 PM MST | Wind Advisory | BYZ | 54 hr |
| Nov 26, 3:19 AM MST | Wind Advisory | BYZ | 51 hr |
| Nov 29, 3:50 AM MST | Winter Storm Watch | BYZ | 24 hr |
| Nov 29, 4:16 PM MST | Winter Weather Advisory | BYZ | 35 hr |
| Nov 30, 4:19 AM MST | Winter Storm Warning | BYZ | 26 hr |
| Dec 1, 3:09 AM MST | Wind Advisory | BYZ | 18 hr |
| Dec 3, 9:39 PM MST | Winter Weather Advisory | BYZ | 15 hr |
| Dec 6, 2:08 AM MST | Wind Advisory | BYZ | 13 hr |
| Dec 19, 2:14 PM MST | Winter Storm Watch | BYZ | 26 hr |
| Dec 20, 3:47 PM MST | Winter Storm Warning | BYZ | 29 hr |
| Dec 20, 3:47 PM MST | Winter Weather Advisory | BYZ | 29 hr |
| Dec 22, 3:17 AM MST | High Wind Watch | BYZ | 12 hr |
| Dec 22, 3:16 PM MST | Wind Advisory | BYZ | 42 hr |
| Dec 25, 4:46 PM MST | Wind Advisory | BYZ | 17 hr |
| Dec 26, 2:56 PM MST | Wind Advisory | BYZ | 18 hr |
| Dec 27, 8:56 AM MST | High Wind Warning | BYZ | 60 hr |
| Dec 29, 3:13 PM MST | Wind Advisory | BYZ | 30 hr |
| Dec 30, 3:36 AM MST | Winter Storm Warning | BYZ | 30 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
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.