Alert archive / Missouri / Polk County
Weather alerts in Polk County, Missouri, 2020
154 weather alerts in 2020, 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 2020. Tap one for its archive.
- Alerts
- 154
- Warnings
- 50
- Watches
- 23
- Advisories
- 39
- Busiest month
- May27 alerts
- Busiest day
- January 10, 20209 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 4 tornado warnings covering Polk County in 2020 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 6 minutes after it went out.
Polk County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 1 | 75% | 1 | 100% | 6 min |
| Severe thunderstorm warnings | 21 | 16 | 24% | 10 | 90% | 9 min |
| Flash flood warnings | 6 | 6 | 0% | 9 | 89% | 367 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Springfield, MO: tornado warnings | 27 | 1 | 96% | 4 | 50% | 5 min |
| NWS Springfield, MO: severe thunderstorm warnings | 281 | 167 | 41% | 499 | 88% | 21 min |
| NWS Springfield, MO: flash flood warnings | 58 | 41 | 29% | 171 | 88% | 207 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 8, 2:15 PM CST | Flash Flood Watch | SGF | 62 hr |
| Jan 10, 2:55 AM CST | Winter Weather Advisory | SGF | 39 hr |
| Jan 10, 12:11 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 10, 2:22 PM CST | Severe Thunderstorm Warning | SGF | 38 min |
| Jan 10, 2:24 PM CST | Tornado Warning | SGF | 36 min |
| Jan 10, 2:35 PM CST | Tornado Warning | SGF | 25 min |
| Jan 10, 2:51 PM CST | Tornado Warning | SGF | 24 min |
| Jan 10, 4:03 PM CST | Flash Flood Warning | SGF | 19 hr |
| Jan 10, 5:01 PM CST | Flash Flood Warning | SGF | 18 hr |
| Jan 10, 5:33 PM CST | Flash Flood Warning | SGF | 17 hr |
| Jan 11, 8:32 AM CST | Areal Flood Warning | SGF | 24 hr |
| Jan 11, 10:14 AM CST | Areal Flood Warning | SGF | 24 hr |
| Jan 16, 2:22 AM CST | Flood Watch | SGF | 52 hr |
| Jan 16, 3:03 AM CST | Winter Weather Advisory | SGF | 41 hr |
| Jan 17, 3:20 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 18, 1:41 AM CST | Areal Flood Warning | SGF | 12 hr |
| Jan 18, 12:54 PM CST | Areal Flood Advisory | SGF | 10 hr |
| Jan 21, 2:55 PM CST | Winter Weather Advisory | SGF | 21 hr |
| Jan 22, 12:18 PM CST | Winter Weather Advisory | SGF | 24 hr |
| Jan 23, 3:17 AM CST | Winter Weather Advisory | SGF | 36 hr |
| Jan 26, 8:47 PM CST | Dense Fog Advisory | SGF | 13 hr |
| Jan 27, 10:19 PM CST | Dense Fog Advisory | SGF | 11 hr |
| Jan 28, 3:09 AM CST | Winter Weather Advisory | SGF | 33 hr |
| Feb 4, 3:51 AM CST | Winter Storm Watch | SGF | 12 hr |
| Feb 4, 3:51 AM CST | Winter Weather Advisory | SGF | 53 hr |
| Feb 4, 3:28 PM CST | Winter Storm Warning | SGF | 23 hr |
| Feb 5, 2:02 AM CST | Mesoscale Discussion | SPC | 3 hr |
| Feb 5, 2:30 PM CST | Winter Weather Advisory | SGF | 13 hr |
| Feb 11, 2:49 PM CST | Winter Weather Advisory | SGF | 33 hr |
| Feb 22, 2:54 AM CST | Flood Watch | SGF | 63 hr |
| Feb 24, 3:03 PM CST | Areal Flood Advisory | SGF | 12 hr |
| Mar 1, 10:16 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 2, 12:45 AM CST | Flash Flood Warning | SGF | 4 hr |
| Mar 5, 3:05 AM CST | Red Flag Warning | SGF | 15 hr |
| Mar 7, 3:19 AM CST | Red Flag Warning | SGF | 15 hr |
| Mar 8, 3:53 AM CDT | Red Flag Warning | SGF | 15 hr |
| Mar 9, 3:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 11, 4:27 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 18, 2:24 PM CDT | Flash Flood Watch | SGF | 29 hr |
| Mar 19, 5:17 AM CDT | Special Weather Statement | SGF | 43 min |
| Mar 19, 8:12 AM CDT | Flash Flood Warning | SGF | 4 hr |
| Mar 19, 11:39 AM CDT | Areal Flood Warning | SGF | 6 hr |
| Mar 19, 6:33 PM CDT | Areal Flood Warning | SGF | 15 hr |
| Mar 24, 9:19 AM CDT | Areal Flood Advisory | SGF | 4 hr |
| Mar 27, 3:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 27, 4:06 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 27, 5:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Mar 28, 3:41 AM CDT | Wind Advisory | SGF | 15 hr |
| Mar 28, 7:05 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Apr 9, 2:57 AM CDT | Freeze Warning | SGF | 29 hr |
| Apr 12, 3:57 AM CDT | Freeze Warning | SGF | 30 hr |
| Apr 12, 3:57 AM CDT | Wind Advisory | SGF | 27 hr |
| Apr 13, 3:05 PM CDT | Freeze Warning | SGF | 18 hr |
| Apr 14, 2:11 PM CDT | Frost Advisory | SGF | 18 hr |
| Apr 17, 10:54 AM CDT | Freeze Warning | SGF | 22 hr |
| Apr 20, 2:20 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 24, 12:35 PM CDT | Flood Watch | SGF | 20 hr |
| Apr 24, 8:14 PM CDT | Severe Thunderstorm Warning | SGF | 61 min |
| Apr 28, 1:55 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 28, 3:51 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 28, 6:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| May 3, 8:34 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 3, 10:05 AM CDT | Severe Thunderstorm Warning | SGF | 40 min |
| May 3, 10:34 AM CDT | Mesoscale Discussion | SPC | 86 min |
| May 4, 6:33 AM CDT | Severe Thunderstorm Watch | SPC | 12 hr |
| May 4, 9:00 AM CDT | Mesoscale Discussion | SPC | 90 min |
| May 4, 10:38 AM CDT | Mesoscale Discussion | SPC | 97 min |
| May 4, 11:30 AM CDT | Severe Thunderstorm Warning | SGF | 45 min |
| May 4, 12:00 PM CDT | Severe Thunderstorm Warning | SGF | 45 min |
| May 4, 12:11 PM CDT | Severe Thunderstorm Warning | SGF | 49 min |
| May 4, 12:57 PM CDT | Severe Thunderstorm Warning | SGF | 29 min |
| May 4, 1:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 4, 1:22 PM CDT | Severe Thunderstorm Warning | SGF | 53 min |
| May 4, 9:45 PM CDT | Areal Flood Advisory | SGF | 12 hr |
| May 8, 3:51 AM CDT | Frost Advisory | SGF | 27 hr |
| May 10, 1:44 PM CDT | Frost Advisory | SGF | 17 hr |
| May 14, 3:12 AM CDT | Flash Flood Watch | SGF | 33 hr |
| May 14, 1:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 14, 4:01 PM CDT | Severe Thunderstorm Warning | SGF | 59 min |
| May 15, 1:06 AM CDT | Mesoscale Discussion | SPC | 114 min |
| May 15, 1:40 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 15, 1:42 AM CDT | Severe Thunderstorm Warning | SGF | 47 min |
| May 15, 4:20 AM CDT | Areal Flood Advisory | SGF | 12 hr |
| May 15, 4:04 PM CDT | Areal Flood Advisory | SGF | 21 hr |
| May 24, 2:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 2:51 AM CDT | Flash Flood Watch | SGF | 28 hr |
| May 25, 2:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| May 27, 9:25 PM CDT | Dense Fog Advisory | SGF | 12 hr |
| Jun 4, 2:07 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 4, 3:32 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 4, 4:13 AM CDT | Severe Thunderstorm Warning | SGF | 47 min |
| Jun 4, 4:45 AM CDT | Severe Thunderstorm Warning | SGF | 45 min |
| Jun 5, 3:31 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 5, 3:41 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 7, 3:25 AM CDT | Flash Flood Watch | SGF | 55 hr |
| Jun 9, 3:55 AM CDT | Areal Flood Warning | SGF | 11 hr |
| Jun 9, 2:41 PM CDT | Areal Flood Warning | SGF | 12 hr |
| Jun 9, 2:44 PM CDT | Areal Flood Warning | SGF | 12 hr |
| Jun 10, 2:38 AM CDT | Areal Flood Advisory | SGF | 8 hr |
| Jun 30, 2:48 PM CDT | Heat Advisory | SGF | 29 hr |
| Jul 1, 5:40 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Jul 1, 9:55 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 1, 2:49 PM CDT | Heat Advisory | SGF | 28 hr |
| Jul 9, 1:09 AM CDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jul 9, 7:16 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 11, 3:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 11, 3:36 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 17, 3:30 AM CDT | Heat Advisory | SGF | 65 hr |
| Jul 17, 11:11 AM CDT | Areal Flood Advisory | SGF | 3 hr |
| Jul 17, 11:47 AM CDT | Flash Flood Warning | SGF | 3 hr |
| Jul 19, 7:38 PM CDT | Special Weather Statement | SGF | 37 min |
| Jul 19, 8:13 PM CDT | Severe Thunderstorm Warning | SGF | 32 min |
| Jul 20, 12:26 PM CDT | Special Weather Statement | SGF | 34 min |
| Jul 31, 3:08 AM CDT | Flash Flood Watch | SGF | 17 hr |
| Aug 9, 5:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 10, 2:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 6:54 PM CDT | Severe Thunderstorm Warning | SGF | 51 min |
| Aug 11, 5:48 PM CDT | Special Weather Statement | SGF | 27 min |
| Aug 28, 5:29 AM CDT | Dense Fog Advisory | SGF | 4 hr |
| Aug 29, 9:46 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 29, 9:56 AM CDT | Special Weather Statement | SGF | 64 min |
| Aug 29, 10:32 AM CDT | Severe Thunderstorm Warning | SGF | 43 min |
| Aug 29, 10:48 AM CDT | Severe Thunderstorm Warning | SGF | 57 min |
| Aug 31, 8:41 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 31, 11:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 31, 11:15 AM CDT | Special Weather Statement | SGF | 45 min |
| Aug 31, 12:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Sep 3, 12:40 AM CDT | Dense Fog Advisory | SGF | 8 hr |
| Sep 8, 3:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 27, 3:41 PM CDT | Severe Thunderstorm Warning | SGF | 49 min |
| Sep 27, 3:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Oct 12, 1:11 PM CDT | Red Flag Warning | SGF | 3 hr |
| Oct 13, 2:17 PM CDT | Fire Weather Watch | SGF | 13 hr |
| Oct 14, 2:55 AM CDT | Red Flag Warning | SGF | 15 hr |
| Oct 15, 2:26 AM CDT | Frost Advisory | SGF | 31 hr |
| Oct 16, 3:30 AM CDT | Fire Weather Watch | SGF | 11 hr |
| Oct 16, 2:16 PM CDT | Red Flag Warning | SGF | 29 hr |
| Oct 16, 2:27 PM CDT | Wind Advisory | SGF | 28 hr |
| Oct 23, 2:29 PM CDT | Frost Advisory | SGF | 8 hr |
| Nov 14, 4:46 PM CST | Mesoscale Discussion | SPC | 29 min |
| Nov 14, 5:14 PM CST | Tornado Watch | SPC | 8 hr |
| Nov 14, 5:54 PM CST | Severe Thunderstorm Warning | SGF | 51 min |
| Nov 14, 6:04 PM CST | Severe Thunderstorm Warning | SGF | 41 min |
| Nov 14, 6:30 PM CST | Severe Thunderstorm Warning | SGF | 8 min |
| Nov 14, 6:34 PM CST | Tornado Warning | SGF | 26 min |
| Nov 14, 6:45 PM CST | Severe Thunderstorm Warning | SGF | 60 min |
| Nov 14, 7:34 PM CST | Mesoscale Discussion | SPC | 86 min |
| Nov 14, 8:29 PM CST | Special Weather Statement | SGF | 61 min |
| Nov 18, 1:20 PM CST | Wind Advisory | SGF | 29 hr |
| Nov 22, 11:33 PM CST | Dense Fog Advisory | SGF | 11 hr |
| Nov 26, 2:11 AM CST | Dense Fog Advisory | SGF | 8 hr |
| Dec 22, 3:06 PM CST | Wind Advisory | SGF | 12 hr |
| Dec 23, 2:39 AM CST | Wind Advisory | SGF | 15 hr |
| Dec 29, 11:47 AM CST | Wind Advisory | SGF | 11 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 | 21 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 35 |
| Special Weather Statement | 7 |
| Flooding | |
| Areal Flood Warning | 8 |
| Flash Flood Warning | 6 |
| Flash Flood Watch | 6 |
| Flood Watch | 3 |
| Areal Flood Advisory | 8 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 4 |
| Frost Advisory | 5 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fire | |
| Red Flag Warning | 6 |
| Fire Weather Watch | 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 archive20192021
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.