Alert archive / Minnesota / Isanti County
Weather alerts in Isanti County, Minnesota, 2015
83 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Isanti County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 83
- Warnings
- 13
- Watches
- 12
- Advisories
- 30
- Busiest month
- July15 alerts
- Busiest day
- July 13, 20157 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Isanti County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 6 | 14% | 8 | 38% | 23 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Twin Cities, MN: tornado warnings | 33 | 8 | 76% | 25 | 52% | 14 min |
| NWS Twin Cities, MN: severe thunderstorm warnings | 131 | 67 | 49% | 307 | 63% | 28 min |
| NWS Twin Cities, MN: flash flood warnings | 14 | 10 | 29% | 21 | 76% | 58 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 3, 3:38 AM CST | Wind Chill Advisory | MPX | 54 hr |
| Jan 3, 3:38 AM CST | Winter Weather Advisory | MPX | 20 days |
| Jan 3, 3:44 PM CST | Wind Chill Watch | MPX | 12 hr |
| Jan 4, 3:58 AM CST | Wind Chill Warning | MPX | 26 hr |
| Jan 6, 3:52 AM CST | Wind Chill Warning | MPX | 29 hr |
| Jan 7, 9:00 AM CST | Wind Chill Advisory | MPX | 21 hr |
| Jan 8, 4:20 AM CST | Winter Weather Advisory | MPX | 20 hr |
| Jan 8, 3:49 PM CST | Wind Chill Advisory | MPX | 20 hr |
| Jan 9, 3:21 AM CST | Wind Chill Advisory | MPX | 30 hr |
| Jan 12, 2:46 PM CST | Wind Chill Advisory | MPX | 20 hr |
| Jan 28, 3:02 PM CST | Freezing Rain Advisory | MPX | 15 hr |
| Feb 9, 3:49 PM CST | Winter Weather Advisory | MPX | 32 hr |
| Feb 13, 2:20 PM CST | Wind Chill Advisory | MPX | 22 hr |
| Feb 17, 3:05 AM CST | Wind Chill Advisory | MPX | 33 hr |
| Feb 20, 3:22 PM CST | Wind Chill Advisory | MPX | 67 hr |
| Feb 25, 2:36 PM CST | Wind Chill Advisory | MPX | 18 hr |
| Mar 2, 4:08 AM CST | Winter Weather Advisory | MPX | 37 hr |
| Mar 3, 2:37 PM CST | Wind Chill Advisory | MPX | 18 hr |
| Apr 1, 3:38 AM CDT | Fire Weather Watch | MPX | 31 hr |
| Apr 1, 1:21 PM CDT | Special Weather Statement | MPX | 39 min |
| Apr 1, 3:50 PM CDT | Red Flag Warning | MPX | 19 hr |
| Apr 2, 10:21 AM CDT | Wind Advisory | MPX | 8 hr |
| Apr 2, 10:39 AM CDT | Red Flag Warning | MPX | 8 hr |
| Apr 5, 2:29 PM CDT | Winter Weather Advisory | MPX | 13 hr |
| Apr 6, 3:39 AM CDT | Freezing Rain Advisory | MPX | 24 hr |
| Apr 12, 6:49 PM CDT | Special Weather Statement | MPX | 26 min |
| Apr 12, 7:34 PM CDT | Special Weather Statement | MPX | 26 min |
| Apr 12, 8:01 PM CDT | Special Weather Statement | MPX | 29 min |
| Apr 15, 3:57 AM CDT | Red Flag Warning | MPX | 16 hr |
| Apr 21, 3:19 PM CDT | Fire Weather Watch | MPX | 13 hr |
| May 17, 8:47 PM CDT | Special Weather Statement | MPX | 28 min |
| May 19, 3:53 AM CDT | Frost Advisory | MPX | 28 hr |
| May 30, 2:35 PM CDT | Frost Advisory | MPX | 17 hr |
| Jun 7, 9:58 PM CDT | Special Weather Statement | MPX | 32 min |
| Jun 22, 2:50 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jun 29, 12:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 29, 1:57 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 29, 4:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 29, 5:00 PM CDT | Severe Thunderstorm Warning | MPX | 60 min |
| Jun 29, 6:02 PM CDT | Severe Thunderstorm Warning | MPX | 43 min |
| Jun 29, 7:25 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jul 5, 7:42 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 5, 8:54 PM CDT | Flash Flood Watch | MPX | 16 hr |
| Jul 11, 6:33 PM CDT | Severe Thunderstorm Warning | MPX | 42 min |
| Jul 12, 5:28 PM CDT | Tornado Watch | SPC | 5 hr |
| Jul 12, 7:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 12, 8:54 PM CDT | Severe Thunderstorm Warning | MPX | 51 min |
| Jul 12, 8:59 PM CDT | Severe Thunderstorm Warning | MPX | 61 min |
| Jul 12, 9:24 PM CDT | Severe Thunderstorm Warning | MPX | 51 min |
| Jul 12, 9:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 12, 9:48 PM CDT | Severe Thunderstorm Warning | MPX | 57 min |
| Jul 12, 11:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 24, 5:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 28, 5:18 AM CDT | Special Weather Statement | MPX | 57 min |
| Jul 28, 6:25 AM CDT | Special Weather Statement | MPX | 35 min |
| Jul 29, 2:53 AM CDT | Wind Advisory | MPX | 9 hr |
| Aug 2, 4:21 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 7:51 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 11:05 AM CDT | Special Weather Statement | MPX | 40 min |
| Aug 6, 6:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 12, 7:03 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Aug 16, 4:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 22, 2:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Aug 22, 2:35 PM CDT | Tornado Watch | SPC | 7 hr |
| Aug 22, 5:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 22, 8:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Sep 6, 2:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 6, 3:42 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 6, 6:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 6, 9:10 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Sep 17, 3:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 29, 2:01 PM CDT | Freeze Warning | MPX | 18 hr |
| Sep 30, 2:46 PM CDT | Frost Advisory | MPX | 17 hr |
| Oct 1, 2:24 PM CDT | Frost Advisory | MPX | 18 hr |
| Oct 2, 2:57 PM CDT | Frost Advisory | MPX | 17 hr |
| Oct 11, 3:14 PM CDT | Wind Advisory | MPX | 27 hr |
| Nov 28, 3:29 PM CST | Winter Storm Watch | MPX | 36 hr |
| Nov 29, 2:15 PM CST | Winter Weather Advisory | MPX | 50 hr |
| Dec 6, 4:37 PM CST | Dense Fog Advisory | MPX | 11 hr |
| Dec 15, 3:25 AM CST | Winter Weather Advisory | MPX | 39 hr |
| Dec 25, 3:16 PM CST | Winter Weather Advisory | MPX | 27 hr |
| Dec 26, 3:05 PM CST | Winter Storm Watch | MPX | 37 hr |
| Dec 28, 4:06 AM CST | Winter Weather Advisory | MPX | 31 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 | 7 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 9 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Watch | 2 |
| Freezing Rain Advisory | 2 |
| Winter Weather Advisory | 9 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 2 |
| Wind Chill Watch | 1 |
| Frost Advisory | 5 |
| Wind Chill Advisory | 10 |
| Wind and dust | |
| Wind Advisory | 3 |
| 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 archive20142016
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.