Alert archive / Montana / Carter County
Weather alerts in Carter County, Montana, 2010
171 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Carter County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 171
- Warnings
- 49
- Watches
- 29
- Advisories
- 34
- Busiest month
- June44 alerts
- Busiest day
- June 22, 201013 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 5 tornado warnings covering Carter County in 2010 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Carter County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 1 | 80% | 1 | 0% | |
| Severe thunderstorm warnings | 27 | 12 | 56% | 22 | 64% | 32 min |
| Flash flood warnings | 6 | 2 | 67% | 2 | 50% | 5 min |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Billings, MT: tornado warnings | 31 | 8 | 74% | 16 | 44% | 16 min |
| NWS Billings, MT: severe thunderstorm warnings | 168 | 68 | 60% | 200 | 67% | 22 min |
| NWS Billings, MT: flash flood warnings | 17 | 3 | 82% | 8 | 50% | 73 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 1, 6:11 PM MST | Winter Weather Advisory | BYZ | 9 hr |
| Jan 4, 3:33 AM MST | Winter Storm Watch | BYZ | 13 hr |
| Jan 4, 4:05 PM MST | Winter Weather Advisory | BYZ | 53 hr |
| Jan 6, 8:57 PM MST | Wind Chill Advisory | BYZ | 14 hr |
| Jan 21, 3:40 AM MST | Winter Storm Watch | BYZ | 48 hr |
| Jan 21, 3:09 PM MST | Winter Storm Warning | BYZ | 4 days |
| Jan 22, 8:18 AM MST | Winter Weather Advisory | BYZ | 7 hr |
| Jan 24, 9:15 AM MST | Blizzard Warning | BYZ | 33 hr |
| Feb 4, 2:51 AM MST | Winter Weather Advisory | BYZ | 31 hr |
| Feb 7, 3:13 AM MST | Wind Chill Advisory | BYZ | 31 hr |
| Feb 7, 7:26 AM MST | Winter Weather Advisory | BYZ | 5 hr |
| Feb 12, 3:41 AM MST | Winter Weather Advisory | BYZ | 44 hr |
| Feb 13, 9:30 PM MST | Wind Chill Advisory | BYZ | 8 hr |
| Feb 22, 12:21 AM MST | Dense Fog Advisory | BYZ | 9 hr |
| Mar 1, 3:13 PM MST | Dense Fog Advisory | BYZ | 20 hr |
| Mar 2, 3:44 PM MST | Dense Fog Advisory | BYZ | 19 hr |
| Mar 3, 2:58 PM MST | Dense Fog Advisory | BYZ | 18 hr |
| Mar 5, 1:05 PM MST | Winter Weather Advisory | BYZ | 21 hr |
| Mar 6, 10:35 AM MST | Winter Weather Advisory | BYZ | 81 min |
| Mar 7, 3:29 AM MST | Dense Fog Advisory | BYZ | 6 hr |
| Mar 7, 6:50 PM MST | Dense Fog Advisory | BYZ | 18 hr |
| Mar 8, 2:45 PM MST | Dense Fog Advisory | BYZ | 15 hr |
| Mar 9, 4:17 AM MST | Winter Storm Watch | BYZ | 11 hr |
| Mar 9, 3:01 PM MST | Winter Weather Advisory | BYZ | 36 hr |
| Mar 13, 8:46 PM MST | Dense Fog Advisory | BYZ | 5 hr |
| Mar 31, 4:03 AM MDT | Winter Storm Watch | BYZ | 24 hr |
| Mar 31, 4:05 PM MDT | Winter Weather Advisory | BYZ | 41 hr |
| Apr 8, 2:52 PM MDT | High Wind Warning | BYZ | 12 hr |
| Apr 30, 8:03 AM MDT | High Wind Warning | BYZ | 18 hr |
| May 1, 3:37 PM MDT | High Wind Watch | BYZ | 47 hr |
| May 3, 4:12 AM MDT | High Wind Warning | BYZ | 41 hr |
| May 5, 3:36 AM MDT | Winter Storm Watch | BYZ | 12 hr |
| May 5, 3:28 PM MDT | Winter Weather Advisory | BYZ | 36 hr |
| May 24, 3:42 PM MDT | High Wind Warning | BYZ | 19 hr |
| May 26, 3:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| May 26, 5:03 PM MDT | Tornado Watch | SPC | 7 hr |
| May 26, 6:47 PM MDT | Special Weather Statement | BYZ | 58 min |
| May 26, 7:48 PM MDT | Special Weather Statement | BYZ | 57 min |
| May 26, 8:30 PM MDT | Mesoscale Discussion | SPC | 60 min |
| May 26, 8:57 PM MDT | Tornado Warning | BYZ | 48 min |
| May 26, 10:18 PM MDT | Special Weather Statement | BYZ | 57 min |
| May 26, 10:48 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| May 27, 4:39 PM MDT | Tornado Watch | SPC | 8 hr |
| May 28, 9:44 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 29, 1:05 AM MDT | Mesoscale Discussion | SPC | 85 min |
| Jun 16, 3:18 AM MDT | Flash Flood Watch | BYZ | 32 hr |
| Jun 16, 3:52 AM MDT | High Wind Watch | BYZ | 11 hr |
| Jun 16, 2:31 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Jun 16, 2:57 PM MDT | High Wind Warning | BYZ | 43 hr |
| Jun 16, 3:30 PM MDT | Tornado Watch | SPC | 8 hr |
| Jun 16, 6:01 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Jun 16, 9:23 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jun 16, 10:36 PM MDT | Special Weather Statement | BYZ | 54 min |
| Jun 16, 11:33 PM MDT | Special Weather Statement | BYZ | 57 min |
| Jun 17, 12:04 AM MDT | Flash Flood Warning | BYZ | 5 hr |
| Jun 20, 1:30 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 20, 4:23 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jun 20, 5:36 PM MDT | Severe Thunderstorm Warning | BYZ | 54 min |
| Jun 20, 6:08 PM MDT | Severe Thunderstorm Warning | BYZ | 67 min |
| Jun 20, 7:09 PM MDT | Severe Thunderstorm Warning | BYZ | 51 min |
| Jun 20, 7:55 PM MDT | Flash Flood Warning | BYZ | 3 hr |
| Jun 20, 9:05 PM MDT | Flash Flood Warning | BYZ | 5 hr |
| Jun 21, 4:07 AM MDT | Flash Flood Watch | BYZ | 19 hr |
| Jun 21, 1:36 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jun 21, 2:08 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 21, 6:42 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Jun 21, 8:14 PM MDT | Tornado Warning | BYZ | 31 min |
| Jun 21, 8:15 PM MDT | Flash Flood Warning | BYZ | 6 hr |
| Jun 21, 8:21 PM MDT | Severe Thunderstorm Warning | BYZ | 54 min |
| Jun 21, 8:37 PM MDT | Tornado Warning | BYZ | 23 min |
| Jun 21, 8:42 PM MDT | Tornado Warning | BYZ | 33 min |
| Jun 21, 8:54 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 21, 9:00 PM MDT | Severe Thunderstorm Warning | BYZ | 60 min |
| Jun 21, 9:16 PM MDT | Tornado Warning | BYZ | 14 min |
| Jun 21, 9:58 PM MDT | Severe Thunderstorm Warning | BYZ | 32 min |
| Jun 22, 1:18 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 5:13 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Jun 22, 5:29 PM MDT | Flash Flood Warning | BYZ | 3 hr |
| Jun 22, 6:11 PM MDT | Severe Thunderstorm Warning | BYZ | 51 min |
| Jun 24, 11:22 PM MDT | Severe Thunderstorm Warning | BYZ | 16 min |
| Jun 25, 3:41 AM MDT | Special Weather Statement | BYZ | 64 min |
| Jun 25, 4:15 AM MDT | Flash Flood Warning | BYZ | 3 hr |
| Jun 25, 11:53 PM MDT | Special Weather Statement | BYZ | 52 min |
| Jun 26, 1:21 AM MDT | Severe Thunderstorm Warning | BYZ | 54 min |
| Jun 26, 10:14 AM MDT | Severe Thunderstorm Warning | BYZ | 18 min |
| Jun 26, 1:24 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Jun 26, 1:56 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 4:13 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 5:23 PM MDT | Severe Thunderstorm Warning | BYZ | 52 min |
| Jun 30, 6:13 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Jun 30, 6:58 PM MDT | Severe Thunderstorm Warning | BYZ | 62 min |
| Jun 30, 7:33 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| Jun 30, 7:36 PM MDT | Severe Thunderstorm Warning | BYZ | 26 min |
| Jun 30, 9:44 PM MDT | Special Weather Statement | BYZ | 61 min |
| Jul 2, 3:43 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jul 10, 3:25 PM MDT | Special Weather Statement | BYZ | 35 min |
| Jul 10, 5:03 PM MDT | Special Weather Statement | BYZ | 57 min |
| Jul 10, 6:37 PM MDT | Special Weather Statement | BYZ | 23 min |
| Jul 11, 12:47 PM MDT | Mesoscale Discussion | SPC | 28 min |
| Jul 11, 1:03 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 12, 1:03 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Jul 12, 2:06 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 13, 11:33 PM MDT | Special Weather Statement | BYZ | 57 min |
| Jul 13, 11:39 PM MDT | Severe Thunderstorm Warning | BYZ | 21 min |
| Jul 14, 12:04 AM MDT | Special Weather Statement | BYZ | 56 min |
| Jul 18, 4:43 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jul 18, 6:21 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 18, 6:55 PM MDT | Severe Thunderstorm Warning | BYZ | 65 min |
| Jul 18, 7:32 PM MDT | Severe Thunderstorm Warning | BYZ | 58 min |
| Jul 18, 7:48 PM MDT | Special Weather Statement | BYZ | 57 min |
| Jul 19, 1:31 PM MDT | Severe Thunderstorm Warning | BYZ | 59 min |
| Jul 19, 2:10 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jul 19, 2:18 PM MDT | Severe Thunderstorm Warning | BYZ | 57 min |
| Jul 19, 2:21 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 20, 10:35 PM MDT | Severe Thunderstorm Warning | BYZ | 42 min |
| Jul 21, 1:22 AM MDT | Special Weather Statement | BYZ | 68 min |
| Jul 21, 9:38 AM MDT | Severe Thunderstorm Warning | BYZ | 22 min |
| Jul 21, 1:29 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 2:49 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 21, 10:37 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jul 23, 4:35 PM MDT | Special Weather Statement | BYZ | 40 min |
| Jul 25, 10:07 PM MDT | Special Weather Statement | BYZ | 53 min |
| Jul 25, 10:55 PM MDT | Severe Thunderstorm Warning | BYZ | 55 min |
| Jul 25, 11:53 PM MDT | Special Weather Statement | BYZ | 52 min |
| Jul 26, 12:22 AM MDT | Special Weather Statement | BYZ | 53 min |
| Jul 26, 3:56 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jul 26, 4:15 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 26, 10:27 PM MDT | Special Weather Statement | BYZ | 63 min |
| Jul 26, 11:05 PM MDT | Special Weather Statement | BYZ | 55 min |
| Jul 27, 12:05 AM MDT | Special Weather Statement | BYZ | 85 min |
| Jul 31, 12:01 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 3, 6:52 AM MDT | Mesoscale Discussion | SPC | 83 min |
| Aug 3, 9:29 AM MDT | Special Weather Statement | BYZ | 61 min |
| Aug 3, 10:31 AM MDT | Flash Flood Watch | BYZ | 10 hr |
| Aug 6, 1:16 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 6, 2:27 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 6, 4:27 PM MDT | Special Weather Statement | BYZ | 63 min |
| Aug 6, 8:23 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Aug 12, 2:47 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Aug 12, 6:09 PM MDT | Special Weather Statement | BYZ | 66 min |
| Aug 12, 7:04 PM MDT | Special Weather Statement | BYZ | 41 min |
| Aug 22, 3:52 AM MDT | Red Flag Warning | BYZ | 14 hr |
| Aug 25, 3:42 PM MDT | Red Flag Warning | BYZ | 47 hr |
| Aug 29, 3:57 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Aug 29, 5:55 PM MDT | Special Weather Statement | BYZ | 65 min |
| Aug 29, 6:46 PM MDT | Severe Thunderstorm Warning | BYZ | 29 min |
| Aug 30, 11:32 AM MDT | Mesoscale Discussion | SPC | 28 min |
| Aug 30, 1:04 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 30, 3:49 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Aug 30, 4:28 PM MDT | Special Weather Statement | BYZ | 62 min |
| Sep 5, 11:27 AM MDT | Special Weather Statement | BYZ | 63 min |
| Sep 5, 7:41 PM MDT | Special Weather Statement | BYZ | 64 min |
| Sep 5, 8:39 PM MDT | Special Weather Statement | BYZ | 66 min |
| Sep 5, 9:13 PM MDT | Severe Thunderstorm Warning | BYZ | 31 min |
| Sep 9, 2:35 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 9, 7:16 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Oct 26, 9:55 AM MDT | High Wind Warning | BYZ | 20 hr |
| Nov 8, 3:33 AM MST | Winter Weather Advisory | BYZ | 43 hr |
| Nov 15, 3:47 PM MST | Winter Weather Advisory | BYZ | 36 hr |
| Nov 21, 3:15 PM MST | Winter Weather Advisory | BYZ | 20 hr |
| Nov 21, 7:59 PM MST | Mesoscale Discussion | SPC | 6 hr |
| Nov 22, 3:30 PM MST | Winter Weather Advisory | BYZ | 4 days |
| Nov 28, 4:31 AM MST | Winter Weather Advisory | BYZ | 35 hr |
| Dec 4, 9:43 PM MST | Dense Fog Advisory | BYZ | 13 hr |
| Dec 5, 2:53 PM MST | Dense Fog Advisory | BYZ | 12 hr |
| Dec 12, 3:47 AM MST | Freezing Rain Advisory | BYZ | 24 hr |
| Dec 23, 7:24 AM MST | Winter Weather Advisory | BYZ | 4 hr |
| Dec 24, 6:24 PM MST | Dense Fog Advisory | BYZ | 18 hr |
| Dec 29, 3:49 AM MST | Winter Storm Warning | BYZ | 59 hr |
| Dec 29, 3:49 AM MST | Winter Weather Advisory | BYZ | 59 hr |
| Dec 31, 2:46 PM MST | Wind Chill Advisory | BYZ | 14 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 | 27 |
| Tornado Warning | 5 |
| Severe Thunderstorm Watch | 14 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 28 |
| Special Weather Statement | 31 |
| Flooding | |
| Flash Flood Warning | 6 |
| Flash Flood Watch | 3 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 5 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 18 |
| Cold | |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 6 |
| High Wind Watch | 2 |
| Fire | |
| Red Flag Warning | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
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.