Alert archive / Nebraska / Polk County
Weather alerts in Polk County, Nebraska, 2018
116 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Polk County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 116
- Warnings
- 23
- Watches
- 19
- Advisories
- 28
- Busiest month
- June35 alerts
- Busiest day
- May 1, 20187 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Polk County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 16 | 10 | 38% | 11 | 73% | 12 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Hastings, NE: tornado warnings | 29 | 7 | 76% | 13 | 69% | 15 min |
| NWS Hastings, NE: severe thunderstorm warnings | 240 | 113 | 53% | 337 | 84% | 23 min |
| NWS Hastings, NE: flash flood warnings | 9 | 1 | 89% | 1 | 100% | 34 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 9, 3:09 AM CST | Winter Storm Watch | GID | 24 hr |
| Jan 9, 3:30 PM CST | Winter Weather Advisory | GID | 43 hr |
| Jan 10, 7:41 AM CST | Dense Fog Advisory | GID | 4 hr |
| Jan 14, 2:37 PM CST | Wind Chill Advisory | GID | 45 hr |
| Jan 19, 3:37 AM CST | Winter Storm Watch | GID | 35 hr |
| Jan 20, 2:52 PM CST | Winter Weather Advisory | GID | 51 hr |
| Jan 21, 3:52 AM CST | Blizzard Warning | GID | 38 hr |
| Jan 22, 2:02 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 22, 9:20 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 5, 7:29 AM CST | Winter Weather Advisory | GID | 6 hr |
| Feb 5, 1:52 PM CST | Winter Weather Advisory | GID | 29 hr |
| Feb 9, 2:39 PM CST | Winter Weather Advisory | GID | 12 hr |
| Feb 18, 3:31 AM CST | Winter Weather Advisory | GID | 29 hr |
| Feb 21, 2:51 PM CST | Winter Weather Advisory | GID | 33 hr |
| Feb 23, 3:50 AM CST | Winter Weather Advisory | GID | 36 hr |
| Mar 21, 4:25 AM CDT | Dense Fog Advisory | GID | 8 hr |
| Mar 30, 3:25 PM CDT | Winter Weather Advisory | GID | 46 hr |
| Apr 4, 3:26 PM CDT | Winter Weather Advisory | GID | 49 hr |
| Apr 11, 3:18 PM CDT | Winter Storm Watch | GID | 37 hr |
| Apr 12, 11:54 AM CDT | Blizzard Warning | GID | 55 hr |
| Apr 13, 4:14 AM CDT | Winter Weather Advisory | GID | 42 hr |
| May 1, 2:47 PM CDT | Tornado Watch | SPC | 9 hr |
| May 1, 3:49 PM CDT | Severe Thunderstorm Warning | GID | 26 min |
| May 1, 4:26 PM CDT | Special Weather Statement | GID | 49 min |
| May 1, 4:31 PM CDT | Severe Thunderstorm Warning | GID | 44 min |
| May 1, 5:09 PM CDT | Severe Thunderstorm Warning | GID | 51 min |
| May 1, 5:44 PM CDT | Severe Thunderstorm Warning | GID | 21 min |
| May 1, 5:54 PM CDT | Severe Thunderstorm Warning | GID | 36 min |
| May 5, 5:18 PM CDT | Special Weather Statement | GID | 42 min |
| May 10, 7:59 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 11, 4:24 AM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 1, 2:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 1, 3:57 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 1, 9:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 1, 10:05 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 1, 10:54 PM CDT | Severe Thunderstorm Warning | GID | 51 min |
| Jun 1, 11:42 PM CDT | Special Weather Statement | GID | 48 min |
| Jun 6, 2:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 6, 3:23 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 6, 4:06 PM CDT | Severe Thunderstorm Warning | GID | 39 min |
| Jun 6, 6:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 6, 7:49 PM CDT | Special Weather Statement | GID | 41 min |
| Jun 6, 8:11 PM CDT | Severe Thunderstorm Warning | GID | 49 min |
| Jun 6, 8:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 6, 8:58 PM CDT | Special Weather Statement | GID | 47 min |
| Jun 9, 1:16 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 9, 1:59 AM CDT | Severe Thunderstorm Warning | GID | 31 min |
| Jun 9, 2:31 AM CDT | Severe Thunderstorm Warning | GID | 29 min |
| Jun 9, 2:51 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 11, 2:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 3:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 18, 1:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 18, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 5:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 19, 6:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 8:46 PM CDT | Severe Thunderstorm Warning | GID | 29 min |
| Jun 24, 9:58 PM CDT | Flash Flood Watch | GID | 5 hr |
| Jun 25, 11:37 AM CDT | Areal Flood Advisory | GID | 4 hr |
| Jun 25, 5:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 11:11 PM CDT | River Flood Warning | OAX | 16 hr |
| Jun 27, 2:30 PM CDT | Heat Advisory | GID | 54 hr |
| Jun 28, 7:20 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 12:40 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 30, 3:26 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 30, 6:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 30, 6:18 PM CDT | Special Weather Statement | GID | 42 min |
| Jun 30, 7:00 PM CDT | Special Weather Statement | GID | 45 min |
| Jun 30, 8:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 30, 11:06 PM CDT | Special Weather Statement | GID | 39 min |
| Jun 30, 11:38 PM CDT | Special Weather Statement | GID | 52 min |
| Jul 1, 12:06 AM CDT | Severe Thunderstorm Warning | GID | 39 min |
| Jul 1, 12:30 AM CDT | Areal Flood Advisory | GID | 3 hr |
| Jul 1, 8:41 AM CDT | River Flood Warning | OAX | 24 hr |
| Jul 4, 3:53 AM CDT | Heat Advisory | GID | 16 hr |
| Jul 14, 4:33 AM CDT | Dense Fog Advisory | GID | 5 hr |
| Jul 18, 6:14 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 18, 9:21 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 19, 12:47 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 19, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 19, 1:03 AM CDT | Special Weather Statement | GID | 42 min |
| Jul 19, 1:08 AM CDT | Severe Thunderstorm Warning | GID | 37 min |
| Jul 19, 1:38 AM CDT | Severe Thunderstorm Warning | GID | 37 min |
| Jul 25, 7:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 25, 8:42 PM CDT | Special Weather Statement | GID | 48 min |
| Jul 27, 9:30 PM CDT | Special Weather Statement | GID | 45 min |
| Jul 30, 4:15 PM CDT | Special Weather Statement | GID | 30 min |
| Aug 5, 9:32 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 6, 2:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 6, 7:25 PM CDT | Severe Thunderstorm Warning | GID | 50 min |
| Aug 6, 8:04 PM CDT | Areal Flood Advisory | GID | 3 hr |
| Aug 24, 6:07 AM CDT | Special Weather Statement | GID | 23 min |
| Aug 24, 6:32 AM CDT | Special Weather Statement | GID | 28 min |
| Aug 24, 7:01 AM CDT | Special Weather Statement | GID | 29 min |
| Sep 1, 2:22 AM CDT | Severe Thunderstorm Warning | GID | 38 min |
| Sep 1, 2:30 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Sep 1, 2:32 AM CDT | Special Weather Statement | GID | 43 min |
| Sep 1, 5:05 PM CDT | Flash Flood Watch | GID | 4 days |
| Sep 18, 3:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Sep 20, 2:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 20, 3:11 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 20, 3:24 PM CDT | Special Weather Statement | GID | 36 min |
| Oct 6, 3:29 PM CDT | Flood Watch | GID | 3 days |
| Oct 10, 4:20 AM CDT | Freeze Watch | GID | 11 hr |
| Oct 10, 4:20 AM CDT | Freeze Warning | GID | 30 hr |
| Oct 13, 2:33 PM CDT | Freeze Watch | GID | 13 hr |
| Oct 14, 3:05 AM CDT | Freeze Warning | GID | 31 hr |
| Nov 17, 2:12 PM CST | Winter Weather Advisory | GID | 10 hr |
| Nov 23, 3:30 AM CST | Winter Storm Watch | GID | 10 hr |
| Nov 23, 1:39 PM CST | Winter Weather Advisory | GID | 49 hr |
| Nov 29, 2:09 PM CST | Winter Storm Warning | GID | 61 hr |
| Nov 29, 2:09 PM CST | Winter Weather Advisory | GID | 3 days |
| Nov 29, 9:12 PM CST | Dense Fog Advisory | GID | 14 hr |
| Dec 8, 5:46 AM CST | Dense Fog Advisory | GID | 4 hr |
| Dec 25, 11:25 AM CST | Dense Fog Advisory | GID | 3 hr |
| Dec 25, 5:53 PM CST | Dense Fog Advisory | GID | 10 hr |
| Dec 27, 3:57 AM CST | Winter Weather Advisory | GID | 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 | 16 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 28 |
| Special Weather Statement | 18 |
| Flooding | |
| River Flood Warning | 2 |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Blizzard Warning | 2 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 15 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 2 |
| Wind Chill Advisory | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.