Alert archive / Missouri / Polk County
Weather alerts in Polk County, Missouri, 2018
147 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
- 147
- Warnings
- 43
- Watches
- 18
- Advisories
- 43
- Busiest month
- May26 alerts
- Busiest day
- May 19, 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.
0 of 2 tornado reports fell inside a warning.
Polk County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 2 | 0% | |||
| Severe thunderstorm warnings | 17 | 11 | 35% | 17 | 88% | 14 min |
| Flash flood warnings | 3 | 2 | 33% | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Springfield, MO: tornado warnings | 44 | 15 | 66% | 44 | 73% | 13 min |
| NWS Springfield, MO: severe thunderstorm warnings | 332 | 221 | 33% | 577 | 82% | 22 min |
| NWS Springfield, MO: flash flood warnings | 49 | 32 | 35% | 65 | 94% | 119 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 6, 2:55 AM CST | Winter Weather Advisory | SGF | 39 hr |
| Jan 7, 9:10 PM CST | Dense Fog Advisory | SGF | 15 hr |
| Jan 8, 2:41 PM CST | Dense Fog Advisory | SGF | 21 hr |
| Jan 9, 3:05 PM CST | Dense Fog Advisory | SGF | 19 hr |
| Jan 11, 2:24 AM CST | Winter Weather Advisory | SGF | 22 hr |
| Jan 13, 2:14 PM CST | Winter Weather Advisory | SGF | 25 hr |
| Jan 14, 2:56 PM CST | Wind Chill Advisory | SGF | 45 hr |
| Jan 14, 2:56 PM CST | Winter Weather Advisory | SGF | 24 hr |
| Jan 16, 12:16 PM CST | Wind Chill Advisory | SGF | 4 hr |
| Jan 25, 2:10 AM CST | Red Flag Warning | SGF | 16 hr |
| Jan 26, 3:12 AM CST | Wind Advisory | SGF | 15 hr |
| Feb 3, 9:36 AM CST | Red Flag Warning | SGF | 8 hr |
| Feb 4, 10:48 AM CST | Winter Weather Advisory | SGF | 7 hr |
| Feb 5, 4:24 PM CST | Winter Weather Advisory | SGF | 8 hr |
| Feb 6, 3:07 AM CST | Winter Weather Advisory | SGF | 27 hr |
| Feb 9, 3:12 PM CST | Winter Weather Advisory | SGF | 44 hr |
| Feb 15, 9:32 AM CST | Wind Advisory | SGF | 5 hr |
| Feb 18, 10:37 AM CST | Wind Advisory | SGF | 7 hr |
| Feb 19, 1:08 AM CST | Wind Advisory | SGF | 8 hr |
| Feb 19, 3:22 PM CST | Flood Watch | SGF | 39 hr |
| Feb 20, 9:25 AM CST | Winter Weather Advisory | SGF | 22 hr |
| Feb 21, 3:28 AM CST | Winter Weather Advisory | SGF | 30 hr |
| Feb 21, 5:01 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 22, 1:46 PM CST | Flood Watch | SGF | 52 hr |
| Feb 23, 11:40 PM CST | Areal Flood Warning | SGF | 15 hr |
| Feb 24, 12:09 PM CST | Areal Flood Warning | SGF | 7 hr |
| Feb 24, 6:38 PM CST | Areal Flood Warning | SGF | 24 hr |
| Mar 4, 8:54 PM CST | Special Weather Statement | SGF | 51 min |
| Mar 5, 1:36 PM CST | Wind Advisory | SGF | 28 hr |
| Mar 5, 1:47 PM CST | Red Flag Warning | SGF | 28 hr |
| Mar 15, 8:48 AM CDT | Red Flag Warning | SGF | 10 hr |
| Mar 16, 2:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Mar 16, 4:06 PM CDT | Special Weather Statement | SGF | 24 min |
| Mar 19, 4:26 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 25, 2:38 PM CDT | Flood Watch | SGF | 55 hr |
| Mar 31, 2:43 PM CDT | Freeze Warning | SGF | 19 hr |
| Apr 1, 2:04 PM CDT | Winter Weather Advisory | SGF | 10 hr |
| Apr 1, 3:34 PM CDT | Freeze Warning | SGF | 16 hr |
| Apr 3, 3:35 AM CDT | Freeze Warning | SGF | 29 hr |
| Apr 4, 3:46 AM CDT | Frost Advisory | SGF | 28 hr |
| Apr 5, 2:46 PM CDT | Freeze Warning | SGF | 44 hr |
| Apr 6, 3:12 PM CDT | Winter Weather Advisory | SGF | 17 hr |
| Apr 7, 3:19 AM CDT | Freeze Warning | SGF | 30 hr |
| Apr 9, 2:00 PM CDT | Freeze Warning | SGF | 18 hr |
| Apr 11, 3:26 AM CDT | Red Flag Warning | SGF | 16 hr |
| Apr 12, 3:02 AM CDT | Wind Advisory | SGF | 39 hr |
| Apr 13, 1:20 PM CDT | Tornado Watch | SPC | 9 hr |
| Apr 13, 5:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 14, 3:04 AM CDT | Freeze Warning | SGF | 30 hr |
| Apr 15, 3:05 AM CDT | Freeze Warning | SGF | 30 hr |
| Apr 18, 2:16 PM CDT | Frost Advisory | SGF | 19 hr |
| Apr 19, 2:03 AM CDT | Frost Advisory | SGF | 31 hr |
| May 2, 10:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| May 2, 11:09 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 3, 1:15 AM CDT | Special Weather Statement | SGF | 45 min |
| May 14, 1:20 PM CDT | Severe Thunderstorm Watch | SPC | 11 hr |
| May 14, 7:03 PM CDT | Special Weather Statement | SGF | 57 min |
| May 14, 7:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| May 17, 1:22 AM CDT | Special Weather Statement | SGF | 38 min |
| May 17, 2:02 AM CDT | Areal Flood Advisory | SGF | 6 hr |
| May 19, 7:26 AM CDT | Severe Thunderstorm Warning | SGF | 49 min |
| May 19, 7:46 AM CDT | Severe Thunderstorm Warning | SGF | 44 min |
| May 19, 7:50 AM CDT | Mesoscale Discussion | SPC | 115 min |
| May 19, 11:33 AM CDT | Special Weather Statement | SGF | 42 min |
| May 19, 11:50 AM CDT | Severe Thunderstorm Warning | SGF | 40 min |
| May 19, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | 11 hr |
| May 19, 6:00 PM CDT | Special Weather Statement | SGF | 45 min |
| May 19, 6:11 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 19, 6:23 PM CDT | Severe Thunderstorm Warning | SGF | 33 min |
| May 20, 12:42 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 20, 6:38 AM CDT | Special Weather Statement | SGF | 52 min |
| May 20, 2:24 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 20, 3:32 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 20, 6:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 23, 4:31 PM CDT | Severe Thunderstorm Warning | SGF | 44 min |
| May 30, 1:53 AM CDT | Special Weather Statement | SGF | 82 min |
| May 31, 2:59 AM CDT | Mesoscale Discussion | SPC | 61 min |
| May 31, 5:04 AM CDT | Special Weather Statement | SGF | 56 min |
| Jun 2, 5:48 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 2, 8:27 AM CDT | Severe Thunderstorm Warning | SGF | 34 min |
| Jun 2, 9:04 AM CDT | Special Weather Statement | SGF | 56 min |
| Jun 2, 9:12 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 12, 12:33 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 15, 7:51 PM CDT | Special Weather Statement | SGF | 54 min |
| Jun 16, 3:26 AM CDT | Heat Advisory | SGF | 64 hr |
| Jun 20, 3:53 PM CDT | Special Weather Statement | SGF | 67 min |
| Jun 20, 5:15 PM CDT | Areal Flood Advisory | SGF | 5 hr |
| Jun 26, 2:19 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 26, 3:20 AM CDT | Heat Advisory | SGF | 5 days |
| Jun 26, 7:39 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 12:16 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 26, 12:35 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 2:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 26, 4:51 PM CDT | Severe Thunderstorm Warning | SGF | 24 min |
| Jun 27, 3:25 AM CDT | Heat Advisory | SGF | 4 days |
| Jun 27, 2:39 PM CDT | Excessive Heat Warning | SGF | 3 days |
| Jun 27, 2:39 PM CDT | Heat Advisory | SGF | 20 hr |
| Jun 27, 2:39 PM CDT | Heat Advisory | SGF | 23 hr |
| Jul 2, 2:41 PM CDT | Heat Advisory | SGF | 29 hr |
| Jul 3, 4:35 PM CDT | Severe Thunderstorm Warning | SGF | 36 min |
| Jul 10, 2:48 PM CDT | Heat Advisory | SGF | 4 days |
| Jul 18, 2:29 PM CDT | Heat Advisory | SGF | 29 hr |
| Jul 18, 3:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 9:58 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 11:22 AM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 19, 2:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 3:23 PM CDT | Severe Thunderstorm Warning | SGF | 67 min |
| Jul 19, 4:00 PM CDT | Severe Thunderstorm Warning | SGF | 60 min |
| Jul 19, 5:45 PM CDT | Severe Thunderstorm Warning | SGF | 45 min |
| Jul 20, 2:29 AM CDT | Special Weather Statement | SGF | 31 min |
| Jul 20, 6:22 AM CDT | Special Weather Statement | SGF | 23 min |
| Aug 10, 4:56 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 10, 5:03 PM CDT | Severe Thunderstorm Warning | SGF | 27 min |
| Aug 10, 5:15 PM CDT | Severe Thunderstorm Warning | SGF | 30 min |
| Aug 16, 5:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 16, 6:51 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 16, 8:03 PM CDT | Severe Thunderstorm Warning | SGF | 42 min |
| Aug 19, 4:07 PM CDT | Tornado Watch | SPC | 7 hr |
| Aug 19, 5:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Aug 19, 6:40 PM CDT | Severe Thunderstorm Warning | SGF | 50 min |
| Aug 19, 7:31 PM CDT | Severe Thunderstorm Warning | SGF | 59 min |
| Aug 29, 8:08 PM CDT | Flash Flood Watch | SGF | 21 hr |
| Aug 30, 8:20 AM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 30, 10:34 AM CDT | Flash Flood Warning | SGF | 6 hr |
| Aug 30, 4:15 PM CDT | Areal Flood Warning | SGF | 18 hr |
| Sep 6, 4:05 AM CDT | Flash Flood Watch | SGF | 53 hr |
| Sep 7, 7:11 PM CDT | Flash Flood Warning | SGF | 5 hr |
| Sep 7, 8:30 PM CDT | Flash Flood Warning | SGF | 4 hr |
| Sep 7, 11:13 PM CDT | Areal Flood Warning | SGF | 12 hr |
| Oct 6, 9:20 PM CDT | Special Weather Statement | SGF | 40 min |
| Oct 9, 11:31 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Oct 9, 12:17 PM CDT | Tornado Watch | SPC | 8 hr |
| Oct 15, 3:37 AM CDT | Freeze Warning | SGF | 29 hr |
| Oct 20, 2:54 AM CDT | Freeze Warning | SGF | 30 hr |
| Nov 8, 3:17 AM CST | Freeze Watch | SGF | 23 hr |
| Nov 8, 5:30 PM CST | Winter Weather Advisory | SGF | 7 hr |
| Nov 9, 2:17 AM CST | Freeze Warning | SGF | 34 hr |
| Nov 11, 2:00 PM CST | Winter Weather Advisory | SGF | 36 hr |
| Nov 25, 1:59 AM CST | Wind Advisory | SGF | 19 hr |
| Nov 25, 2:44 AM CST | Winter Weather Advisory | SGF | 21 hr |
| Nov 29, 10:04 PM CST | Dense Fog Advisory | SGF | 14 hr |
| Nov 30, 9:47 PM CST | Tornado Watch | SPC | 5 hr |
| Nov 30, 11:20 PM CST | Mesoscale Discussion | SPC | 85 min |
| Dec 1, 12:59 AM CST | Severe Thunderstorm Warning | SGF | 61 min |
| Dec 14, 7:51 PM CST | Dense Fog Advisory | SGF | 8 hr |
| Dec 26, 2:05 PM CST | Wind Advisory | SGF | 22 hr |
| Dec 31, 6:07 AM CST | Areal Flood Warning | SGF | 8 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 | 17 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 27 |
| Special Weather Statement | 16 |
| Flooding | |
| Areal Flood Warning | 6 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 2 |
| Flood Watch | 3 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Weather Advisory | 15 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 8 |
| Cold | |
| Freeze Warning | 11 |
| Freeze Watch | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
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.