Alert archive / Missouri / Ralls County

Weather alerts in Ralls County, Missouri, 2018

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

Ralls County and its neighbors

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

Alerts
92
Warnings
32
Watches
5
Advisories
32
Busiest month
June28 alerts
Busiest day
June 28, 201812 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

Ralls County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings17853%650%14 min
Flash flood warnings3167%0

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS St. Louis, MO: tornado warnings20385%1942%14 min
NWS St. Louis, MO: severe thunderstorm warnings21810154%37580%23 min
NWS St. Louis, MO: flash flood warnings451958%4885%90 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 2, 3:57 PM CSTWind Chill AdvisoryLSX43 hr
Jan 6, 3:35 AM CSTWinter Weather AdvisoryLSX44 hr
Jan 7, 9:42 PM CSTDense Fog AdvisoryLSX10 hr
Jan 8, 3:36 PM CSTDense Fog AdvisoryLSX20 hr
Jan 9, 3:28 PM CSTDense Fog AdvisoryLSX18 hr
Jan 11, 3:14 AM CSTWinter Weather AdvisoryLSX27 hr
Jan 14, 3:22 PM CSTWind Chill AdvisoryLSX45 hr
Jan 14, 3:22 PM CSTWinter Weather AdvisoryLSX21 hr
Feb 3, 9:58 AM CSTRed Flag WarningLSX8 hr
Feb 5, 11:15 AM CSTWinter Weather AdvisoryLSX13 hr
Feb 9, 3:23 PM CSTWinter Weather AdvisoryLSX18 hr
Feb 10, 4:20 AM CSTWinter Weather AdvisoryLSX29 hr
Feb 20, 2:50 PM CSTWinter Weather AdvisoryLSX44 hr
Feb 20, 9:18 PM CSTMesoscale DiscussionSPC6 hr
Feb 21, 3:33 AM CSTWinter Weather AdvisoryLSX31 hr
Feb 22, 8:58 PM CSTDense Fog AdvisoryLSX7 hr
Feb 28, 11:10 PM CSTDense Fog AdvisoryLSX5 hr
Mar 26, 1:50 PM CDTFlash Flood WarningLSX6 hr
Mar 26, 7:45 PM CDTAreal Flood WarningLSX12 hr
Mar 27, 6:59 AM CDTAreal Flood WarningLSX12 hr
Mar 31, 3:36 PM CDTWinter Weather AdvisoryLSX30 hr
Apr 1, 1:38 PM CDTMesoscale DiscussionSPC4 hr
May 2, 10:20 PM CDTMesoscale DiscussionSPC115 min
May 2, 11:09 PM CDTSevere Thunderstorm WatchSPC7 hr
May 3, 1:10 AM CDTSevere Thunderstorm WarningLSX50 min
May 3, 11:40 AM CDTRiver Flood WarningLSX21 days
May 14, 12:54 PM CDTMesoscale DiscussionSPC96 min
May 14, 1:20 PM CDTSevere Thunderstorm WatchSPC11 hr
May 14, 4:01 PM CDTSevere Thunderstorm WarningLSX44 min
May 14, 4:16 PM CDTSevere Thunderstorm WarningLSX74 min
May 14, 5:15 PM CDTSevere Thunderstorm WarningLSX75 min
May 16, 7:42 AM CDTFlash Flood WarningLSX2 hr
May 19, 3:41 AM CDTDense Fog AdvisoryLSX5 hr
May 19, 9:01 AM CDTDense Fog AdvisoryLSX99 min
May 26, 12:59 PM CDTMesoscale DiscussionSPC3 hr
May 27, 5:45 PM CDTSpecial Weather StatementLSX45 min
May 27, 5:50 PM CDTSevere Thunderstorm WarningLSX25 min
Jun 2, 8:06 AM CDTSpecial Weather StatementLSX39 min
Jun 2, 8:32 AM CDTSevere Thunderstorm WarningLSX43 min
Jun 10, 4:30 PM CDTMesoscale DiscussionSPC90 min
Jun 11, 4:53 PM CDTMesoscale DiscussionSPC2 hr
Jun 11, 5:13 PM CDTSpecial Weather StatementLSX32 min
Jun 14, 1:17 PM CDTMesoscale DiscussionSPC118 min
Jun 14, 2:08 PM CDTSevere Thunderstorm WarningLSX25 min
Jun 14, 2:36 PM CDTSevere Thunderstorm WarningLSX39 min
Jun 14, 3:12 PM CDTSevere Thunderstorm WarningLSX48 min
Jun 15, 3:53 AM CDTHeat AdvisoryLSX5 days
Jun 19, 12:37 PM CDTMesoscale DiscussionSPC113 min
Jun 19, 3:22 PM CDTSpecial Weather StatementLSX38 min
Jun 20, 5:09 PM CDTSpecial Weather StatementLSX66 min
Jun 23, 9:57 PM CDTRiver Flood WarningLSX19 days
Jun 25, 3:23 PM CDTMesoscale DiscussionSPC97 min
Jun 27, 3:46 AM CDTHeat AdvisoryLSX5 days
Jun 28, 2:00 AM CDTMesoscale DiscussionSPC3 hr
Jun 28, 6:54 AM CDTSpecial Weather StatementLSX36 min
Jun 28, 7:34 AM CDTSevere Thunderstorm WarningLSX41 min
Jun 28, 7:58 AM CDTSevere Thunderstorm WarningLSX47 min
Jun 28, 8:23 AM CDTSpecial Weather StatementLSX37 min
Jun 28, 8:43 AM CDTMesoscale DiscussionSPC62 min
Jun 28, 8:53 AM CDTSevere Thunderstorm WarningLSX33 min
Jun 28, 10:57 AM CDTMesoscale DiscussionSPC2 hr
Jun 28, 1:04 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 28, 3:21 PM CDTSevere Thunderstorm WarningLSX69 min
Jun 28, 3:34 PM CDTMesoscale DiscussionSPC116 min
Jun 28, 4:00 PM CDTSevere Thunderstorm WarningLSX60 min
Jul 3, 3:31 AM CDTHeat AdvisoryLSX64 hr
Jul 5, 3:56 PM CDTAreal Flood AdvisoryLSX3 hr
Jul 12, 3:35 AM CDTHeat AdvisoryLSX64 hr
Jul 19, 6:26 PM CDTMesoscale DiscussionSPC64 min
Jul 19, 6:49 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 19, 8:58 PM CDTSevere Thunderstorm WarningLSX62 min
Jul 19, 9:36 PM CDTMesoscale DiscussionSPC54 min
Aug 16, 9:12 PM CDTSevere Thunderstorm WarningLSX33 min
Aug 16, 9:44 PM CDTSevere Thunderstorm WarningLSX46 min
Aug 24, 5:54 AM CDTAreal Flood AdvisoryLSX4 hr
Aug 24, 8:30 AM CDTAreal Flood AdvisoryLSX4 hr
Aug 24, 3:33 PM CDTHeat AdvisoryLSX4 days
Sep 4, 11:31 AM CDTRiver Flood WarningLSX16 days
Sep 6, 3:21 AM CDTFlash Flood WatchLSX60 hr
Sep 6, 4:08 AM CDTFlash Flood WarningLSX6 hr
Sep 6, 10:00 AM CDTAreal Flood WarningLSX9 hr
Sep 28, 12:04 PM CDTRiver Flood WarningLSX35 days
Oct 15, 4:02 AM CDTFrost AdvisoryLSX29 hr
Oct 15, 2:02 PM CDTFreeze WarningLSX19 hr
Oct 27, 3:25 PM CDTWind AdvisoryLSX27 hr
Nov 3, 3:03 AM CDTDense Fog AdvisoryLSX6 hr
Nov 4, 8:58 PM CSTRiver Flood WarningLSX4 days
Nov 9, 10:52 AM CSTWinter Weather AdvisoryLSX10 hr
Nov 24, 3:33 AM CSTWinter Weather AdvisoryLSX32 hr
Nov 25, 11:22 AM CSTBlizzard WarningLSX16 hr
Dec 14, 4:59 PM CSTDense Fog AdvisoryLSX6 hr
Dec 31, 9:07 AM CSTAreal Flood WarningLSX3 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.