Alert archive / Iowa / Greene County
Weather alerts in Greene County, Iowa, 2018
157 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Greene County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 157
- Warnings
- 38
- Watches
- 29
- Advisories
- 36
- Busiest month
- June48 alerts
- Busiest day
- June 30, 20189 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
3 of 6 tornado warnings covering Greene County in 2018 had a tornado report inside them; 1 of 3 tornado reports fell inside a warning, on average 4 minutes after it went out.
Greene County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 6 | 3 | 50% | 3 | 33% | 4 min |
| Severe thunderstorm warnings | 22 | 8 | 64% | 10 | 50% | 17 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 Des Moines, IA: tornado warnings | 72 | 23 | 68% | 69 | 55% | 15 min |
| NWS Des Moines, IA: severe thunderstorm warnings | 308 | 143 | 54% | 427 | 74% | 22 min |
| NWS Des Moines, IA: flash flood warnings | 39 | 20 | 49% | 70 | 74% | 86 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, 3:46 AM CST | Wind Chill Advisory | DMX | 30 hr |
| Jan 9, 3:57 AM CST | Winter Storm Watch | DMX | 34 hr |
| Jan 10, 2:08 PM CST | Winter Storm Warning | DMX | 24 hr |
| Jan 10, 2:08 PM CST | Winter Weather Advisory | DMX | 28 hr |
| Jan 11, 2:24 PM CST | Wind Chill Advisory | DMX | 20 hr |
| Jan 14, 3:47 AM CST | Wind Chill Advisory | DMX | 56 hr |
| Jan 14, 3:10 PM CST | Wind Chill Warning | DMX | 43 hr |
| Jan 21, 2:35 PM CST | Winter Weather Advisory | DMX | 33 hr |
| Jan 24, 3:28 PM CST | Dense Fog Advisory | DMX | 21 hr |
| Feb 4, 2:32 PM CST | Winter Weather Advisory | DMX | 28 hr |
| Feb 5, 11:36 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 7, 2:23 PM CST | Winter Weather Advisory | DMX | 40 hr |
| Feb 8, 11:05 AM CST | Winter Storm Warning | DMX | 19 hr |
| Feb 8, 9:07 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 18, 3:27 AM CST | Wind Advisory | DMX | 11 hr |
| Feb 18, 3:45 AM CST | Winter Weather Advisory | DMX | 56 hr |
| Feb 21, 3:42 PM CST | Winter Weather Advisory | DMX | 35 hr |
| Feb 23, 3:24 PM CST | Winter Weather Advisory | DMX | 30 hr |
| Mar 4, 3:35 PM CST | Winter Weather Advisory | DMX | 50 hr |
| Mar 16, 4:10 AM CDT | Winter Weather Advisory | DMX | 30 hr |
| Mar 23, 4:00 AM CDT | Winter Weather Advisory | DMX | 39 hr |
| Mar 30, 3:19 PM CDT | Wind Advisory | DMX | 25 hr |
| Apr 2, 2:00 PM CDT | Winter Weather Advisory | DMX | 35 hr |
| Apr 3, 4:19 AM CDT | Wind Advisory | DMX | 21 hr |
| Apr 7, 3:05 PM CDT | Winter Weather Advisory | DMX | 40 hr |
| Apr 13, 3:22 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 13, 3:54 PM CDT | Winter Weather Advisory | DMX | 48 hr |
| Apr 13, 5:27 PM CDT | Special Weather Statement | DMX | 63 min |
| Apr 13, 5:31 PM CDT | Mesoscale Discussion | SPC | 29 min |
| Apr 13, 5:36 PM CDT | Severe Thunderstorm Warning | DMX | 39 min |
| Apr 13, 6:02 PM CDT | Severe Thunderstorm Warning | DMX | 43 min |
| Apr 13, 6:52 PM CDT | Severe Thunderstorm Warning | DMX | 38 min |
| Apr 17, 3:54 AM CDT | Winter Weather Advisory | DMX | 42 hr |
| Apr 27, 2:42 PM CDT | Red Flag Warning | DMX | 4 hr |
| Apr 29, 3:26 AM CDT | Red Flag Warning | DMX | 18 hr |
| Apr 30, 3:18 AM CDT | Wind Advisory | DMX | 17 hr |
| May 1, 4:31 AM CDT | Special Weather Statement | DMX | 59 min |
| May 1, 3:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 1, 5:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 1, 7:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 1, 8:17 PM CDT | Severe Thunderstorm Warning | DMX | 43 min |
| May 1, 9:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 3, 12:00 PM CDT | Special Weather Statement | DMX | 30 min |
| May 5, 6:37 PM CDT | Special Weather Statement | DMX | 53 min |
| May 8, 8:10 PM CDT | Special Weather Statement | DMX | 35 min |
| May 12, 1:04 AM CDT | Mesoscale Discussion | SPC | 116 min |
| May 22, 2:05 AM CDT | Dense Fog Advisory | DMX | 7 hr |
| May 28, 2:31 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 29, 1:43 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 29, 3:54 PM CDT | Mesoscale Discussion | SPC | 96 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, 4:22 PM CDT | Severe Thunderstorm Warning | DMX | 38 min |
| Jun 6, 4:40 PM CDT | Severe Thunderstorm Warning | DMX | 50 min |
| Jun 6, 4:59 PM CDT | Severe Thunderstorm Warning | DMX | 46 min |
| Jun 6, 5:39 PM CDT | Severe Thunderstorm Warning | DMX | 66 min |
| Jun 6, 5:57 PM CDT | Severe Thunderstorm Warning | DMX | 63 min |
| Jun 6, 6:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 8, 12:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 9, 2:51 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 10, 1:23 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 10, 6:35 AM CDT | Special Weather Statement | DMX | 40 min |
| Jun 10, 9:53 PM CDT | Flash Flood Watch | DMX | 10 hr |
| Jun 10, 10:24 PM CDT | Special Weather Statement | DMX | 51 min |
| Jun 11, 3:42 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 11, 8:46 PM CDT | Severe Thunderstorm Warning | DMX | 44 min |
| Jun 13, 11:56 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 14, 3:00 PM CDT | Heat Advisory | DMX | 4 days |
| 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, 3:41 PM CDT | Flash Flood Watch | DMX | 16 hr |
| Jun 18, 5:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 18, 8:30 PM CDT | River Flood Warning | DMX | 8 days |
| Jun 19, 1:32 AM CDT | Special Weather Statement | DMX | 73 min |
| Jun 19, 2:07 AM CDT | Severe Thunderstorm Warning | DMX | 47 min |
| Jun 20, 4:28 AM CDT | Flash Flood Watch | DMX | 23 hr |
| Jun 20, 2:16 PM CDT | Tornado Warning | DMX | 29 min |
| Jun 20, 2:22 PM CDT | Tornado Warning | DMX | 25 min |
| Jun 20, 2:46 PM CDT | Tornado Warning | DMX | 17 min |
| Jun 20, 3:04 PM CDT | Tornado Watch | SPC | 4 hr |
| Jun 24, 3:19 PM CDT | Severe Thunderstorm Warning | DMX | 41 min |
| Jun 24, 3:28 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jun 24, 4:24 PM CDT | Severe Thunderstorm Warning | DMX | 33 min |
| Jun 25, 1:08 PM CDT | Flash Flood Watch | DMX | 14 hr |
| Jun 25, 5:40 PM CDT | Tornado Watch | SPC | 3 hr |
| Jun 25, 7:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 3:29 PM CDT | Heat Advisory | DMX | 54 hr |
| Jun 28, 8:12 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 28, 10:57 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 2:59 AM CDT | Flash Flood Watch | DMX | 27 hr |
| Jun 30, 10:24 AM CDT | River Flood Watch | DMX | 7 days |
| Jun 30, 1:39 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 3:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 4:06 PM CDT | Severe Thunderstorm Warning | DMX | 24 min |
| Jun 30, 4:10 PM CDT | Tornado Warning | DMX | 18 min |
| Jun 30, 4:31 PM CDT | Severe Thunderstorm Warning | DMX | 25 min |
| Jun 30, 4:59 PM CDT | Severe Thunderstorm Warning | DMX | 46 min |
| Jun 30, 5:43 PM CDT | Severe Thunderstorm Warning | DMX | 23 min |
| Jun 30, 9:08 PM CDT | Severe Thunderstorm Warning | DMX | 28 min |
| Jul 1, 4:30 AM CDT | River Flood Warning | DMX | 5 days |
| Jul 3, 2:39 PM CDT | Heat Advisory | DMX | 29 hr |
| Jul 4, 10:27 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 11:51 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 10, 3:30 PM CDT | Heat Advisory | DMX | 53 hr |
| Jul 13, 3:48 AM CDT | Flash Flood Watch | DMX | 18 hr |
| Jul 13, 12:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 15, 6:08 AM CDT | Dense Fog Advisory | DMX | 3 hr |
| Jul 25, 7:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 1, 6:40 PM CDT | Severe Thunderstorm Warning | DMX | 50 min |
| Aug 1, 6:52 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 1, 7:40 PM CDT | Severe Thunderstorm Warning | DMX | 50 min |
| Aug 5, 4:10 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Aug 5, 5:10 AM CDT | Special Weather Statement | DMX | 50 min |
| Aug 5, 9:32 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 3:45 AM CDT | Severe Thunderstorm Warning | DMX | 45 min |
| Aug 20, 8:42 PM CDT | River Flood Watch | DMX | 48 hr |
| Aug 24, 9:55 AM CDT | Special Weather Statement | DMX | 35 min |
| Aug 25, 3:19 AM CDT | Dense Fog Advisory | DMX | 6 hr |
| Aug 26, 9:53 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 11:50 AM CDT | Special Weather Statement | DMX | 55 min |
| Aug 28, 12:51 PM CDT | Special Weather Statement | DMX | 54 min |
| Aug 31, 1:10 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 31, 8:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Sep 1, 4:38 AM CDT | Flash Flood Watch | DMX | 24 hr |
| Sep 1, 6:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Sep 1, 8:20 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 1, 10:27 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Sep 2, 9:45 AM CDT | Flash Flood Watch | DMX | 36 hr |
| Sep 3, 5:47 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Sep 4, 2:06 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 4, 3:35 PM CDT | Tornado Watch | SPC | 7 hr |
| Sep 6, 5:56 AM CDT | River Flood Warning | DMX | 72 hr |
| Sep 19, 7:55 AM CDT | Special Weather Statement | DMX | 65 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, 5:48 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Sep 20, 6:59 PM CDT | Special Weather Statement | DMX | 61 min |
| Sep 20, 7:54 PM CDT | Special Weather Statement | DMX | 51 min |
| Sep 20, 8:43 PM CDT | Special Weather Statement | DMX | 62 min |
| Sep 25, 9:27 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 3, 12:07 PM CDT | Wind Advisory | DMX | 13 hr |
| Oct 5, 2:39 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 6, 9:06 PM CDT | River Flood Watch | DMX | 7 days |
| Oct 7, 3:52 PM CDT | Flood Watch | DMX | 60 hr |
| Oct 8, 6:12 PM CDT | Severe Thunderstorm Warning | DMX | 48 min |
| Oct 8, 6:29 PM CDT | Tornado Warning | DMX | 31 min |
| Oct 8, 6:55 PM CDT | Tornado Warning | DMX | 24 min |
| Oct 9, 6:39 AM CDT | River Flood Warning | DMX | 5 days |
| Oct 13, 3:23 PM CDT | Freeze Watch | DMX | 23 hr |
| Oct 14, 3:45 AM CDT | Freeze Warning | DMX | 30 hr |
| Oct 27, 3:47 AM CDT | Dense Fog Advisory | DMX | 6 hr |
| Nov 29, 3:43 AM CST | Winter Storm Watch | DMX | 36 hr |
| Nov 30, 2:34 AM CST | Dense Fog Advisory | DMX | 7 hr |
| Nov 30, 3:18 PM CST | Winter Weather Advisory | DMX | 45 hr |
| Dec 13, 7:07 PM CST | Dense Fog Advisory | DMX | 17 hr |
| Dec 28, 12:55 AM CST | Winter Weather Advisory | DMX | 11 hr |
| Dec 31, 3:26 AM CST | Winter Weather Advisory | DMX | 20 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 | 22 |
| Tornado Warning | 6 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 38 |
| Special Weather Statement | 16 |
| Flooding | |
| River Flood Warning | 4 |
| Flash Flood Watch | 8 |
| Flood Watch | 1 |
| River Flood Watch | 3 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 17 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 2 |
| 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.