Alert archive / Iowa / Monona County
Weather alerts in Monona County, Iowa, 2019
124 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Monona County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 124
- Warnings
- 38
- Watches
- 20
- Advisories
- 39
- Busiest month
- March20 alerts
- Busiest day
- March 13, 20197 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Monona County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 5 | 50% | 2 | 50% | 22 min |
| Flash flood warnings | 5 | 0 | 100% | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Omaha, NE: tornado warnings | 23 | 7 | 70% | 9 | 78% | 18 min |
| NWS Omaha, NE: severe thunderstorm warnings | 191 | 82 | 57% | 179 | 74% | 17 min |
| NWS Omaha, NE: flash flood warnings | 47 | 10 | 79% | 27 | 81% | 284 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 7, 2:53 PM CST | Wind Advisory | OAX | 25 hr |
| Jan 17, 3:38 AM CST | Winter Weather Advisory | OAX | 48 hr |
| Jan 21, 3:47 AM CST | Winter Weather Advisory | OAX | 50 hr |
| Jan 26, 3:02 PM CST | High Wind Watch | OAX | 12 hr |
| Jan 27, 3:04 AM CST | High Wind Warning | OAX | 31 hr |
| Jan 27, 3:55 AM CST | Wind Advisory | OAX | 38 hr |
| Jan 27, 3:18 PM CST | Wind Chill Watch | OAX | 36 hr |
| Jan 28, 2:38 AM CST | Wind Chill Warning | OAX | 57 hr |
| Jan 28, 2:38 AM CST | Wind Chill Advisory | OAX | 3 days |
| Jan 29, 3:19 AM CST | Wind Chill Advisory | OAX | 54 hr |
| Feb 2, 12:14 PM CST | Dense Fog Advisory | OAX | 25 hr |
| Feb 5, 3:31 PM CST | Winter Weather Advisory | OAX | 50 hr |
| Feb 7, 3:29 AM CST | Wind Chill Advisory | OAX | 33 hr |
| Feb 10, 2:55 AM CST | Winter Weather Advisory | OAX | 9 hr |
| Feb 10, 3:56 AM CST | Winter Weather Advisory | OAX | 44 hr |
| Feb 15, 3:35 PM CST | Winter Weather Advisory | OAX | 50 hr |
| Feb 16, 7:26 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 18, 3:50 AM CST | Winter Storm Watch | OAX | 24 hr |
| Feb 19, 3:40 AM CST | Winter Storm Warning | OAX | 32 hr |
| Feb 21, 4:18 AM CST | Winter Weather Advisory | OAX | 71 hr |
| Feb 21, 4:13 PM CST | Winter Storm Watch | OAX | 22 hr |
| Feb 22, 1:46 PM CST | Blizzard Warning | OAX | 37 hr |
| Feb 23, 5:26 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 24, 5:02 AM CST | Winter Weather Advisory | OAX | 10 hr |
| Mar 2, 3:22 AM CST | Wind Chill Advisory | OAX | 57 hr |
| Mar 6, 3:21 AM CST | Winter Weather Advisory | OAX | 36 hr |
| Mar 8, 4:26 AM CST | Winter Weather Advisory | OAX | 35 hr |
| Mar 9, 3:27 AM CST | Wind Advisory | OAX | 21 hr |
| Mar 11, 3:31 AM CDT | Flood Watch | OAX | 3 days |
| Mar 12, 11:25 AM CDT | River Flood Warning | OAX | 5 days |
| Mar 12, 1:48 PM CDT | Areal Flood Advisory | OAX | 6 hr |
| Mar 12, 3:13 PM CDT | Dense Fog Advisory | OAX | 25 hr |
| Mar 12, 3:26 PM CDT | River Flood Watch | FSD | 4 days |
| Mar 13, 7:44 AM CDT | Areal Flood Warning | OAX | 6 hr |
| Mar 13, 9:41 AM CDT | Areal Flood Warning | OAX | 3 hr |
| Mar 13, 11:04 AM CDT | River Flood Warning | FSD | 3 days |
| Mar 13, 11:09 AM CDT | River Flood Warning | OAX | 69 hr |
| Mar 13, 1:26 PM CDT | Areal Flood Warning | OAX | 6 hr |
| Mar 13, 4:02 PM CDT | Wind Advisory | OAX | 33 hr |
| Mar 13, 6:29 PM CDT | Areal Flood Warning | OAX | 39 hr |
| Mar 14, 9:04 PM CDT | River Flood Warning | OAX | 5 days |
| Mar 15, 9:45 AM CDT | Areal Flood Warning | OAX | 24 hr |
| Mar 18, 11:01 AM CDT | Areal Flood Warning | OAX | 24 hr |
| Mar 19, 3:09 PM CDT | River Flood Advisory | OAX | 24 hr |
| Apr 5, 1:05 AM CDT | Dense Fog Advisory | OAX | 9 hr |
| Apr 9, 10:41 AM CDT | River Flood Warning | FSD | 5 days |
| Apr 10, 4:06 AM CDT | Wind Advisory | OAX | 30 hr |
| Apr 27, 3:24 AM CDT | Frost Advisory | OAX | 24 hr |
| Apr 27, 4:00 PM CDT | Freeze Warning | OAX | 11 hr |
| May 5, 1:35 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 7:57 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 16, 8:22 PM CDT | Severe Thunderstorm Warning | OAX | 23 min |
| May 16, 8:40 PM CDT | Severe Thunderstorm Warning | OAX | 35 min |
| May 16, 11:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 21, 12:39 PM CDT | Special Weather Statement | OAX | 81 min |
| May 26, 1:17 PM CDT | Flash Flood Watch | OAX | 25 hr |
| May 27, 10:55 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 30, 10:22 AM CDT | River Flood Warning | OAX | 6 days |
| Jun 5, 12:25 AM CDT | Severe Thunderstorm Warning | OAX | 50 min |
| Jun 5, 10:19 AM CDT | River Flood Advisory | OAX | 6 hr |
| Jun 15, 12:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 7:23 PM CDT | Severe Thunderstorm Warning | OAX | 37 min |
| Jun 20, 7:51 PM CDT | Severe Thunderstorm Warning | OAX | 39 min |
| Jun 21, 2:07 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 22, 10:20 AM CDT | River Flood Advisory | OAX | 5 hr |
| Jun 25, 2:19 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 3:01 PM CDT | Heat Advisory | OAX | 30 hr |
| Jun 29, 2:55 AM CDT | Heat Advisory | OAX | 41 hr |
| Jul 2, 3:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 3, 7:12 AM CDT | Flash Flood Warning | OAX | 3 hr |
| Jul 13, 3:45 AM CDT | Severe Thunderstorm Warning | OAX | 34 min |
| Jul 13, 4:04 AM CDT | Special Weather Statement | OAX | 56 min |
| Jul 15, 3:48 PM CDT | Excessive Heat Watch | OAX | 5 hr |
| Jul 15, 3:48 PM CDT | Excessive Heat Watch | OAX | 5 hr |
| Jul 15, 3:48 PM CDT | Excessive Heat Watch | OAX | 36 hr |
| Jul 16, 3:56 PM CDT | Excessive Heat Warning | OAX | 4 days |
| Jul 17, 4:14 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 17, 4:48 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 17, 7:34 AM CDT | Special Weather Statement | OAX | 56 min |
| Jul 17, 8:25 AM CDT | Special Weather Statement | OAX | 35 min |
| Jul 17, 9:09 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 18, 12:00 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Aug 19, 11:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 19, 11:56 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 20, 3:08 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Sep 11, 4:43 AM CDT | Flash Flood Warning | OAX | 3 hr |
| Sep 13, 11:33 AM CDT | River Flood Warning | OAX | 13 days |
| Sep 14, 8:57 AM CDT | Special Weather Statement | OAX | 18 min |
| Sep 18, 4:04 PM CDT | Flood Watch | OAX | 21 hr |
| Sep 18, 10:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 19, 1:11 AM CDT | Special Weather Statement | OAX | 49 min |
| Sep 19, 2:46 AM CDT | Flash Flood Warning | OAX | 6 hr |
| Sep 19, 4:00 AM CDT | Flash Flood Warning | OAX | 5 hr |
| Sep 19, 5:06 AM CDT | Flash Flood Warning | OAX | 6 hr |
| Sep 19, 9:37 AM CDT | Areal Flood Warning | OAX | 6 hr |
| Sep 21, 9:32 PM CDT | Severe Thunderstorm Warning | OAX | 28 min |
| Sep 21, 9:57 PM CDT | Severe Thunderstorm Warning | OAX | 33 min |
| Sep 21, 10:31 PM CDT | Special Weather Statement | OAX | 29 min |
| Sep 24, 4:43 PM CDT | Tornado Watch | SPC | 7 hr |
| Sep 24, 4:48 PM CDT | Severe Thunderstorm Warning | OAX | 42 min |
| Sep 24, 5:26 PM CDT | Severe Thunderstorm Warning | OAX | 53 min |
| Sep 24, 6:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Sep 30, 3:58 AM CDT | Flash Flood Watch | OAX | 41 hr |
| Oct 3, 8:16 PM CDT | Frost Advisory | OAX | 13 hr |
| Oct 9, 3:11 AM CDT | Freeze Watch | OAX | 12 hr |
| Oct 9, 3:33 PM CDT | Freeze Warning | OAX | 42 hr |
| Oct 10, 8:40 PM CDT | River Flood Advisory | OAX | 61 hr |
| Oct 11, 4:12 AM CDT | Freeze Warning | OAX | 30 hr |
| Oct 12, 9:56 AM CDT | Wind Advisory | OAX | 9 hr |
| Oct 18, 3:47 AM CDT | Wind Advisory | OAX | 14 hr |
| Oct 21, 3:42 AM CDT | Wind Advisory | OAX | 30 hr |
| Oct 21, 1:23 PM CDT | Special Weather Statement | OAX | 52 min |
| Nov 10, 2:34 PM CST | Winter Weather Advisory | OAX | 18 hr |
| Nov 13, 3:32 AM CST | Winter Weather Advisory | OAX | 9 hr |
| Nov 24, 1:51 PM CST | Winter Storm Watch | OAX | 26 hr |
| Nov 25, 3:52 AM CST | Winter Storm Warning | OAX | 53 hr |
| Nov 26, 5:23 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Nov 27, 4:07 PM CST | Winter Weather Advisory | OAX | 47 hr |
| Nov 30, 3:20 AM CST | Wind Advisory | OAX | 33 hr |
| Dec 9, 6:19 AM CST | Special Weather Statement | OAX | 26 min |
| Dec 9, 6:57 AM CST | Special Weather Statement | OAX | 63 min |
| Dec 13, 6:38 AM CST | Special Weather Statement | OAX | 112 min |
| Dec 16, 11:29 PM CST | Dense Fog Advisory | OAX | 10 hr |
| Dec 28, 9:33 AM CST | Flood Watch | OAX | 10 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 archive20182020
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.