Alert archive / Missouri / Mercer County

Weather alerts in Mercer County, Missouri, 2018

100 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Mercer County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts
100
Warnings
26
Watches
12
Advisories
20
Busiest month
June20 alerts
Busiest day
October 8, 20186 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 warnings covering Mercer County in 2018 had a tornado report inside them.

Mercer County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings16475%9100%17 min
Flash flood warnings00

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Kansas City, MO: tornado warnings15473%967%8 min
NWS Kansas City, MO: severe thunderstorm warnings2189656%24184%21 min
NWS Kansas City, MO: flash flood warnings9633%1587%169 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.

IssuedProductOfficeLasted
Jan 3, 3:29 AM CSTWind Chill AdvisoryEAX30 hr
Jan 6, 2:59 AM CSTWinter Weather AdvisoryEAX39 hr
Jan 10, 2:01 PM CSTWinter Weather AdvisoryEAX28 hr
Jan 11, 9:36 AM CSTMesoscale DiscussionSPC4 hr
Jan 14, 3:08 PM CSTWind Chill AdvisoryEAX45 hr
Jan 26, 3:52 AM CSTWind AdvisoryEAX14 hr
Feb 5, 3:58 PM CSTWinter Weather AdvisoryEAX5 hr
Feb 6, 3:18 AM CSTWinter Weather AdvisoryEAX21 hr
Feb 10, 4:16 AM CSTWinter Weather AdvisoryEAX29 hr
Feb 18, 3:32 AM CSTWind AdvisoryEAX14 hr
Feb 19, 3:53 AM CSTWinter Weather AdvisoryEAX44 hr
Feb 21, 3:42 AM CSTWinter Weather AdvisoryEAX44 hr
Feb 22, 8:49 PM CSTDense Fog AdvisoryEAX8 hr
Feb 23, 2:36 PM CSTWinter Weather AdvisoryEAX21 hr
Mar 31, 3:36 AM CDTWinter Weather AdvisoryEAX39 hr
Apr 1, 1:38 PM CDTMesoscale DiscussionSPC4 hr
Apr 13, 2:06 PM CDTMesoscale DiscussionSPC2 hr
Apr 13, 2:19 PM CDTTornado WatchSPC7 hr
May 1, 10:24 AM CDTMesoscale DiscussionSPC3 hr
May 2, 5:08 PM CDTMesoscale DiscussionSPC97 min
May 2, 5:27 PM CDTTornado WatchSPC8 hr
May 2, 8:00 PM CDTMesoscale DiscussionSPC90 min
May 3, 2:36 PM CDTMesoscale DiscussionSPC114 min
May 3, 7:43 PM CDTMesoscale DiscussionSPC62 min
May 14, 7:40 PM CDTSevere Thunderstorm WarningEAX50 min
May 14, 8:04 PM CDTSevere Thunderstorm WarningEAX41 min
May 19, 11:58 PM CDTSevere Thunderstorm WarningEAX62 min
May 28, 2:31 PM CDTMesoscale DiscussionSPC2 hr
May 28, 4:33 PM CDTSevere Thunderstorm WarningEAX27 min
Jun 2, 3:46 AM CDTSpecial Weather StatementEAX44 min
Jun 2, 4:27 AM CDTSevere Thunderstorm WarningEAX33 min
Jun 2, 4:57 AM CDTSevere Thunderstorm WarningEAX48 min
Jun 6, 8:22 PM CDTSpecial Weather StatementEAX38 min
Jun 6, 8:45 PM CDTMesoscale DiscussionSPC90 min
Jun 11, 1:01 AM CDTSevere Thunderstorm WarningEAX59 min
Jun 11, 1:55 AM CDTSpecial Weather StatementEAX50 min
Jun 11, 7:05 AM CDTSpecial Weather StatementEAX40 min
Jun 11, 6:12 PM CDTSevere Thunderstorm WatchSPC8 hr
Jun 11, 9:32 PM CDTMesoscale DiscussionSPC118 min
Jun 11, 9:57 PM CDTSpecial Weather StatementEAX48 min
Jun 14, 2:44 PM CDTHeat AdvisoryEAX5 days
Jun 24, 3:28 PM CDTMesoscale DiscussionSPC62 min
Jun 25, 5:04 PM CDTSpecial Weather StatementEAX26 min
Jun 25, 5:14 PM CDTMesoscale DiscussionSPC2 hr
Jun 26, 3:44 PM CDTHeat AdvisoryEAX4 days
Jun 28, 2:00 AM CDTMesoscale DiscussionSPC3 hr
Jun 28, 4:36 AM CDTSpecial Weather StatementEAX24 min
Jun 28, 5:05 AM CDTSevere Thunderstorm WarningEAX40 min
Jun 28, 10:57 AM CDTMesoscale DiscussionSPC2 hr
Jul 2, 2:37 PM CDTHeat AdvisoryEAX60 hr
Jul 9, 1:46 PM CDTHeat AdvisoryEAX5 days
Jul 19, 2:32 PM CDTMesoscale DiscussionSPC118 min
Aug 6, 6:38 PM CDTMesoscale DiscussionSPC2 hr
Aug 6, 7:53 PM CDTSpecial Weather StatementEAX37 min
Aug 6, 8:02 PM CDTSevere Thunderstorm WarningEAX28 min
Aug 6, 8:26 PM CDTSpecial Weather StatementEAX49 min
Aug 16, 4:34 PM CDTSpecial Weather StatementEAX41 min
Aug 16, 4:46 PM CDTSevere Thunderstorm WarningEAX29 min
Aug 16, 5:11 PM CDTSevere Thunderstorm WarningEAX34 min
Aug 28, 4:32 PM CDTSevere Thunderstorm WarningEAX28 min
Aug 28, 4:41 PM CDTSevere Thunderstorm WarningEAX49 min
Aug 28, 4:45 PM CDTMesoscale DiscussionSPC60 min
Aug 28, 5:06 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 28, 7:02 PM CDTSevere Thunderstorm WarningEAX28 min
Aug 28, 7:27 PM CDTSpecial Weather StatementEAX48 min
Aug 28, 8:19 PM CDTSpecial Weather StatementEAX41 min
Aug 28, 8:37 PM CDTSevere Thunderstorm WarningEAX23 min
Aug 28, 8:57 PM CDTSpecial Weather StatementEAX48 min
Aug 31, 8:47 PM CDTMesoscale DiscussionSPC118 min
Sep 1, 6:34 PM CDTMesoscale DiscussionSPC56 min
Sep 1, 8:20 PM CDTSevere Thunderstorm WatchSPC5 hr
Sep 1, 10:27 PM CDTMesoscale DiscussionSPC63 min
Sep 2, 10:20 AM CDTFlash Flood WatchEAX27 hr
Sep 2, 2:24 PM CDTMesoscale DiscussionSPC2 hr
Sep 6, 3:08 AM CDTFlash Flood WatchEAX54 hr
Sep 20, 11:07 PM CDTSpecial Weather StatementEAX38 min
Sep 25, 1:07 PM CDTMesoscale DiscussionSPC113 min
Oct 5, 2:39 PM CDTMesoscale DiscussionSPC3 hr
Oct 8, 3:56 AM CDTFlood WatchEAX47 hr
Oct 8, 7:03 AM CDTAreal Flood WarningEAX9 hr
Oct 8, 3:49 PM CDTAreal Flood WarningEAX24 hr
Oct 8, 5:33 PM CDTTornado WatchSPC4 hr
Oct 8, 6:45 PM CDTSevere Thunderstorm WarningEAX45 min
Oct 8, 6:50 PM CDTTornado WarningEAX25 min
Oct 8, 7:03 PM CDTMesoscale DiscussionSPC57 min
Oct 9, 12:59 PM CDTMesoscale DiscussionSPC3 hr
Oct 9, 1:46 PM CDTTornado WatchSPC7 hr
Oct 9, 3:06 PM CDTMesoscale DiscussionSPC84 min
Oct 9, 3:35 PM CDTAreal Flood WarningEAX12 hr
Oct 9, 4:29 PM CDTTornado WarningEAX31 min
Oct 10, 3:31 AM CDTAreal Flood WarningEAX9 hr
Oct 13, 2:47 PM CDTFreeze WatchEAX13 hr
Oct 14, 3:26 AM CDTFreeze WarningEAX31 hr
Oct 15, 3:23 AM CDTFreeze WarningEAX30 hr
Nov 9, 9:44 AM CSTWinter Weather AdvisoryEAX7 hr
Nov 17, 3:05 AM CSTWinter Weather AdvisoryEAX24 hr
Nov 23, 3:15 AM CSTWinter Storm WatchEAX24 hr
Nov 24, 3:30 AM CSTWinter Storm WarningEAX11 hr
Nov 24, 2:24 PM CSTBlizzard WarningEAX31 hr
Nov 25, 10:59 AM CSTMesoscale DiscussionSPC5 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 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.