Alert archive / South Dakota / Jackson County

Weather alerts in Jackson County, South Dakota, 2018

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

Jackson County and its neighbors

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

Alerts
143
Warnings
36
Watches
21
Advisories
27
Busiest month
June44 alerts
Busiest day
June 8, 201811 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 1 tornado warnings covering Jackson County in 2018 had a tornado report inside them.

Jackson County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings241921%2471%22 min
Flash flood warnings2150%333%131 min

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Rapid City, SD: tornado warnings18667%1464%18 min
NWS Rapid City, SD: severe thunderstorm warnings37627327%58684%24 min
NWS Rapid City, SD: flash flood warnings13838%1669%42 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 1, 1:31 PM MSTWind Chill AdvisoryUNR19 hr
Jan 9, 2:23 AM MSTWinter Weather AdvisoryUNR47 hr
Jan 14, 2:47 AM MSTWind Chill AdvisoryUNR55 hr
Jan 19, 2:57 AM MSTWinter Storm WatchUNR24 hr
Jan 20, 2:53 AM MSTWinter Storm WarningUNR48 hr
Feb 7, 2:42 PM MSTWinter Weather AdvisoryUNR49 hr
Feb 9, 3:04 PM MSTWind Chill AdvisoryUNR18 hr
Feb 16, 2:11 PM MSTWinter Storm WatchUNR48 hr
Feb 17, 1:55 PM MSTWinter Storm WarningUNR64 hr
Feb 20, 1:45 PM MSTWind Chill AdvisoryUNR19 hr
Mar 2, 3:19 AM MSTWinter Storm WatchUNR48 hr
Mar 3, 1:18 PM MSTDense Fog AdvisoryUNR22 hr
Mar 4, 3:22 AM MSTBlizzard WarningUNR56 hr
Mar 14, 1:52 AM MDTWinter Storm WatchUNR37 hr
Mar 15, 3:21 AM MDTWinter Storm WarningUNR39 hr
Mar 16, 3:04 AM MDTMesoscale DiscussionSPC4 hr
Mar 30, 2:24 PM MDTWind AdvisoryUNR14 hr
Apr 2, 3:14 AM MDTWinter Weather AdvisoryUNR30 hr
Apr 5, 2:49 AM MDTWinter Weather AdvisoryUNR33 hr
Apr 10, 2:45 PM MDTWinter Storm WatchUNR44 hr
Apr 12, 3:16 AM MDTBlizzard WarningUNR57 hr
Apr 13, 3:52 AM MDTMesoscale DiscussionSPC6 hr
Apr 29, 12:49 AM MDTWind AdvisoryUNR18 hr
May 7, 5:47 PM MDTSpecial Weather StatementUNR43 min
May 7, 6:17 PM MDTMesoscale DiscussionSPC118 min
May 17, 12:58 PM MDTMesoscale DiscussionSPC92 min
May 17, 1:23 PM MDTSevere Thunderstorm WatchSPC10 hr
May 17, 4:54 PM MDTMesoscale DiscussionSPC66 min
May 17, 7:11 PM MDTMesoscale DiscussionSPC64 min
May 17, 7:19 PM MDTSpecial Weather StatementUNR26 min
May 17, 7:38 PM MDTSevere Thunderstorm WarningUNR67 min
May 22, 4:56 PM MDTMesoscale DiscussionSPC2 hr
May 22, 6:10 PM MDTSevere Thunderstorm WarningUNR50 min
May 22, 7:05 PM MDTSevere Thunderstorm WarningUNR55 min
May 22, 8:12 PM MDTSpecial Weather StatementUNR33 min
May 22, 8:54 PM MDTSpecial Weather StatementUNR51 min
May 22, 10:25 PM MDTSpecial Weather StatementUNR35 min
May 22, 11:03 PM MDTSpecial Weather StatementUNR42 min
May 22, 11:04 PM MDTSpecial Weather StatementUNR26 min
May 23, 1:31 PM MDTSevere Thunderstorm WatchSPC7 hr
May 23, 7:06 PM MDTSevere Thunderstorm WarningUNR54 min
May 23, 7:28 PM MDTMesoscale DiscussionSPC92 min
May 23, 7:56 PM MDTSevere Thunderstorm WarningUNR49 min
May 23, 8:37 PM MDTSpecial Weather StatementUNR53 min
May 23, 8:46 PM MDTSevere Thunderstorm WarningUNR29 min
May 27, 5:06 PM MDTMesoscale DiscussionSPC84 min
May 27, 5:27 PM MDTSevere Thunderstorm WatchSPC6 hr
May 27, 7:31 PM MDTMesoscale DiscussionSPC119 min
May 27, 10:14 PM MDTMesoscale DiscussionSPC91 min
Jun 1, 5:43 PM MDTWind AdvisoryUNR3 hr
Jun 2, 2:40 AM MDTWind AdvisoryUNR15 hr
Jun 6, 10:58 PM MDTSevere Thunderstorm WarningUNR62 min
Jun 8, 1:01 PM MDTMesoscale DiscussionSPC119 min
Jun 8, 1:39 PM MDTSevere Thunderstorm WatchSPC8 hr
Jun 8, 3:23 PM MDTSpecial Weather StatementUNR52 min
Jun 8, 3:31 PM MDTSpecial Weather StatementUNR44 min
Jun 8, 3:42 PM MDTSevere Thunderstorm WarningUNR78 min
Jun 8, 4:02 PM MDTMesoscale DiscussionSPC88 min
Jun 8, 4:56 PM MDTSevere Thunderstorm WarningUNR64 min
Jun 8, 4:57 PM MDTSevere Thunderstorm WarningUNR63 min
Jun 8, 5:08 PM MDTFlash Flood WarningUNR3 hr
Jun 8, 5:15 PM MDTSpecial Weather StatementUNR45 min
Jun 8, 5:23 PM MDTSevere Thunderstorm WarningUNR51 min
Jun 8, 6:23 PM MDTAreal Flood AdvisoryUNR3 hr
Jun 8, 6:35 PM MDTSpecial Weather StatementUNR40 min
Jun 8, 7:40 PM MDTMesoscale DiscussionSPC95 min
Jun 10, 5:36 PM MDTMesoscale DiscussionSPC114 min
Jun 10, 7:52 PM MDTMesoscale DiscussionSPC113 min
Jun 10, 8:37 PM MDTSevere Thunderstorm WarningUNR37 min
Jun 13, 6:47 AM MDTSpecial Weather StatementUNR58 min
Jun 13, 9:17 AM MDTSevere Thunderstorm WarningUNR58 min
Jun 13, 10:14 AM MDTMesoscale DiscussionSPC61 min
Jun 13, 10:38 AM MDTSevere Thunderstorm WarningUNR46 min
Jun 14, 1:58 PM MDTMesoscale DiscussionSPC62 min
Jun 16, 2:15 PM MDTMesoscale DiscussionSPC90 min
Jun 16, 2:37 PM MDTFlash Flood WatchUNR15 hr
Jun 16, 2:54 PM MDTSevere Thunderstorm WatchSPC7 hr
Jun 16, 5:14 PM MDTMesoscale DiscussionSPC91 min
Jun 16, 6:59 PM MDTMesoscale DiscussionSPC91 min
Jun 16, 8:50 PM MDTMesoscale DiscussionSPC85 min
Jun 18, 1:46 PM MDTFlash Flood WatchUNR51 hr
Jun 20, 8:03 AM MDTAreal Flood AdvisoryUNR12 hr
Jun 20, 8:54 AM MDTRiver Flood WarningUNR33 hr
Jun 22, 2:12 PM MDTFlood WatchUNR54 hr
Jun 22, 4:24 PM MDTSevere Thunderstorm WarningUNR51 min
Jun 22, 5:02 PM MDTFlash Flood WarningUNR3 hr
Jun 22, 5:24 PM MDTSpecial Weather StatementUNR51 min
Jun 22, 6:40 PM MDTSevere Thunderstorm WarningUNR50 min
Jun 24, 12:04 PM MDTSpecial Weather StatementUNR41 min
Jun 26, 10:52 PM MDTMesoscale DiscussionSPC113 min
Jun 28, 5:10 PM MDTMesoscale DiscussionSPC2 hr
Jun 29, 4:57 PM MDTMesoscale DiscussionSPC63 min
Jun 29, 5:19 PM MDTSevere Thunderstorm WatchSPC8 hr
Jul 3, 4:42 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 3, 8:38 PM MDTMesoscale DiscussionSPC2 hr
Jul 6, 2:00 PM MDTHeat AdvisoryUNR53 hr
Jul 16, 2:52 PM MDTMesoscale DiscussionSPC113 min
Jul 18, 12:39 PM MDTMesoscale DiscussionSPC2 hr
Jul 18, 2:43 PM MDTTornado WatchSPC7 hr
Jul 18, 4:16 PM MDTMesoscale DiscussionSPC119 min
Jul 21, 8:40 PM MDTMesoscale DiscussionSPC65 min
Jul 24, 9:28 PM MDTSevere Thunderstorm WarningUNR62 min
Jul 27, 4:55 PM MDTMesoscale DiscussionSPC2 hr
Jul 29, 1:34 PM MDTSevere Thunderstorm WatchSPC7 hr
Jul 29, 1:38 PM MDTSevere Thunderstorm WarningUNR67 min
Jul 29, 2:07 PM MDTTornado WarningUNR38 min
Jul 29, 4:07 PM MDTMesoscale DiscussionSPC53 min
Jul 29, 6:05 PM MDTSpecial Weather StatementUNR25 min
Aug 4, 2:42 PM MDTMesoscale DiscussionSPC93 min
Aug 6, 3:23 PM MDTSpecial Weather StatementUNR52 min
Aug 6, 3:57 PM MDTSpecial Weather StatementUNR48 min
Aug 15, 8:03 AM MDTMesoscale DiscussionSPC2 hr
Aug 18, 1:45 PM MDTMesoscale DiscussionSPC3 hr
Aug 18, 5:29 PM MDTSpecial Weather StatementUNR16 min
Aug 23, 4:07 PM MDTSevere Thunderstorm WarningUNR53 min
Aug 23, 4:33 PM MDTSevere Thunderstorm WarningUNR27 min
Aug 23, 4:47 PM MDTSpecial Weather StatementUNR43 min
Aug 23, 4:55 PM MDTSevere Thunderstorm WarningUNR50 min
Aug 23, 4:59 PM MDTSevere Thunderstorm WarningUNR46 min
Aug 23, 5:12 PM MDTSevere Thunderstorm WarningUNR33 min
Aug 23, 5:44 PM MDTSevere Thunderstorm WarningUNR31 min
Aug 25, 5:36 PM MDTSpecial Weather StatementUNR39 min
Aug 25, 6:41 PM MDTSpecial Weather StatementUNR49 min
Aug 27, 2:46 PM MDTMesoscale DiscussionSPC119 min
Aug 27, 5:17 PM MDTMesoscale DiscussionSPC88 min
Aug 27, 5:42 PM MDTSevere Thunderstorm WatchSPC4 hr
Sep 25, 1:32 PM MDTFrost AdvisoryUNR18 hr
Oct 3, 3:29 AM MDTFreeze WatchUNR11 hr
Oct 3, 3:29 AM MDTWind AdvisoryUNR15 hr
Oct 3, 2:18 PM MDTFreeze WarningUNR18 hr
Oct 9, 4:02 AM MDTWinter Weather AdvisoryUNR31 hr
Oct 18, 9:06 AM MDTWind AdvisoryUNR9 hr
Nov 16, 8:40 PM MSTWinter Weather AdvisoryUNR8 hr
Nov 23, 2:25 PM MSTWinter Weather AdvisoryUNR36 hr
Nov 28, 1:36 PM MSTWinter Storm WatchUNR38 hr
Nov 29, 2:01 PM MSTWinter Storm WarningUNR66 hr
Nov 30, 3:24 AM MSTWinter Weather AdvisoryUNR48 hr
Dec 12, 2:44 AM MSTWind AdvisoryUNR18 hr
Dec 18, 2:18 PM MSTWind AdvisoryUNR27 hr
Dec 24, 1:58 PM MSTWinter Storm WatchUNR24 hr
Dec 25, 2:50 AM MSTWinter Weather AdvisoryUNR3 days
Dec 25, 2:03 PM MSTWinter Storm WarningUNR39 hr
Dec 29, 2:19 PM MSTWinter Weather AdvisoryUNR51 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.