Alert archive / South Dakota / Brule County

Weather alerts in Brule County, South Dakota, 2017

87 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Brule County and its neighbors

Each county as a circle sized by its count in 2017. Tap one for its archive.

Alerts
87
Warnings
24
Watches
13
Advisories
26
Busiest month
June18 alerts
Busiest day
June 13, 201712 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 Brule County in 2017 had a tornado report inside them.

Brule County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings161413%9100%19 min
Flash flood warnings00

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Sioux Falls, SD: tornado warnings36683%1362%16 min
NWS Sioux Falls, SD: severe thunderstorm warnings27021421%35487%19 min
NWS Sioux Falls, SD: flash flood warnings7271%475%68 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, 2:57 PM CSTWind Chill AdvisoryFSD21 hr
Jan 4, 3:11 PM CSTWind Chill AdvisoryFSD43 hr
Jan 19, 3:28 PM CSTDense Fog AdvisoryFSD46 hr
Jan 22, 2:33 PM CSTWinter Storm WatchFSD24 hr
Jan 23, 2:59 PM CSTWinter Storm WarningFSD51 hr
Jan 24, 3:56 AM CSTWinter Storm WarningFSD32 hr
Jan 30, 3:25 AM CSTWind AdvisoryFSD18 hr
Feb 21, 3:59 PM CSTWinter Storm WatchFSD36 hr
Feb 22, 3:22 PM CSTBlizzard WatchFSD20 hr
Feb 23, 4:14 AM CSTWinter Storm WarningFSD32 hr
Feb 23, 4:14 AM CSTWinter Weather AdvisoryFSD24 hr
Mar 5, 4:04 PM CSTHigh Wind WatchFSD36 hr
Mar 5, 4:04 PM CSTHigh Wind WarningFSD28 hr
Mar 6, 4:27 PM CSTWind AdvisoryFSD44 hr
Apr 7, 10:02 AM CDTWind AdvisoryFSD9 hr
Apr 10, 8:49 AM CDTWinter Weather AdvisoryFSD4 hr
Apr 13, 4:45 AM CDTDense Fog AdvisoryFSD5 hr
Apr 13, 10:02 AM CDTDense Fog AdvisoryFSD58 min
Apr 15, 2:06 AM CDTDense Fog AdvisoryFSD4 hr
Jun 10, 9:44 PM CDTMesoscale DiscussionSPC2 hr
Jun 10, 11:56 PM CDTMesoscale DiscussionSPC2 hr
Jun 12, 11:14 PM CDTMesoscale DiscussionSPC91 min
Jun 12, 11:28 PM CDTSevere Thunderstorm WatchSPC6 hr
Jun 13, 2:32 PM CDTMesoscale DiscussionSPC58 min
Jun 13, 3:13 PM CDTTornado WatchSPC7 hr
Jun 13, 3:56 PM CDTSevere Thunderstorm WarningFSD34 min
Jun 13, 4:25 PM CDTSevere Thunderstorm WarningFSD35 min
Jun 13, 4:27 PM CDTSevere Thunderstorm WarningFSD33 min
Jun 13, 4:54 PM CDTTornado Warning Tornado observedFSD36 min
Jun 13, 5:16 PM CDTSevere Thunderstorm WarningFSD44 min
Jun 13, 5:20 PM CDTSevere Thunderstorm WarningFSD25 min
Jun 13, 5:43 PM CDTMesoscale DiscussionSPC2 hr
Jun 13, 5:48 PM CDTSpecial Weather StatementABR42 min
Jun 21, 3:22 AM CDTSevere Thunderstorm WarningFSD38 min
Jun 22, 3:11 AM CDTMesoscale DiscussionSPC64 min
Jun 27, 7:02 PM CDTMesoscale DiscussionSPC88 min
Jun 27, 7:35 PM CDTSevere Thunderstorm WatchSPC5 hr
Jul 5, 5:52 PM CDTMesoscale DiscussionSPC2 hr
Jul 5, 10:16 PM CDTSevere Thunderstorm WarningFSD44 min
Jul 11, 4:26 AM CDTHeat AdvisoryFSD15 hr
Jul 17, 7:14 PM CDTSevere Thunderstorm WarningFSD46 min
Jul 17, 8:39 PM CDTSpecial Weather StatementABR21 min
Jul 18, 3:07 PM CDTHeat AdvisoryFSD29 hr
Jul 20, 3:25 PM CDTHeat AdvisoryFSD29 hr
Jul 21, 10:16 PM CDTMesoscale DiscussionSPC89 min
Jul 24, 3:49 PM CDTMesoscale DiscussionSPC86 min
Jul 25, 2:41 PM CDTMesoscale DiscussionSPC2 hr
Jul 25, 3:22 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 25, 5:21 PM CDTSevere Thunderstorm WarningFSD39 min
Jul 25, 6:25 PM CDTMesoscale DiscussionSPC95 min
Aug 1, 1:49 PM CDTSevere Thunderstorm WarningFSD41 min
Aug 12, 2:36 PM CDTMesoscale DiscussionSPC114 min
Aug 12, 3:59 PM CDTSevere Thunderstorm WatchSPC7 hr
Aug 12, 4:05 PM CDTSevere Thunderstorm WarningFSD40 min
Aug 14, 3:52 AM CDTDense Fog AdvisoryFSD6 hr
Aug 17, 6:00 PM CDTMesoscale DiscussionSPC2 hr
Aug 21, 8:27 AM CDTMesoscale DiscussionSPC2 hr
Aug 21, 8:55 AM CDTSevere Thunderstorm WatchSPC5 hr
Aug 21, 10:39 AM CDTSevere Thunderstorm WarningFSD51 min
Aug 21, 11:12 AM CDTMesoscale DiscussionSPC93 min
Aug 21, 11:23 AM CDTSevere Thunderstorm WarningFSD52 min
Aug 25, 2:57 PM CDTMesoscale DiscussionSPC3 hr
Aug 25, 3:38 PM CDTSevere Thunderstorm WatchSPC7 hr
Aug 25, 5:32 PM CDTSevere Thunderstorm WarningFSD58 min
Aug 25, 5:42 PM CDTSevere Thunderstorm WarningFSD63 min
Aug 25, 5:58 PM CDTMesoscale DiscussionSPC2 hr
Sep 8, 7:56 PM CDTMesoscale DiscussionSPC94 min
Sep 19, 1:51 PM CDTMesoscale DiscussionSPC54 min
Sep 19, 3:37 PM CDTTornado WatchSPC8 hr
Sep 19, 6:36 PM CDTMesoscale DiscussionSPC114 min
Sep 19, 8:53 PM CDTSevere Thunderstorm WarningFSD52 min
Sep 19, 8:56 PM CDTMesoscale DiscussionSPC2 hr
Sep 19, 9:17 PM CDTTornado WarningFSD28 min
Oct 3, 2:54 PM CDTFrost AdvisoryFSD18 hr
Oct 8, 3:28 AM CDTFreeze WatchFSD24 hr
Oct 9, 3:06 AM CDTFreeze WarningFSD30 hr
Oct 22, 3:21 PM CDTWind AdvisoryFSD51 hr
Oct 25, 3:05 PM CDTWind AdvisoryFSD51 hr
Nov 29, 2:54 AM CSTWind AdvisoryFSD13 hr
Dec 3, 3:46 PM CSTWinter Weather AdvisoryFSD32 hr
Dec 11, 2:59 AM CSTWind AdvisoryFSD15 hr
Dec 12, 2:43 PM CSTWind AdvisoryFSD27 hr
Dec 21, 9:48 AM CSTWinter Weather AdvisoryFSD13 hr
Dec 25, 4:29 AM CSTWind Chill AdvisoryFSD32 hr
Dec 26, 2:31 PM CSTWind Chill AdvisoryFSD20 hr
Dec 29, 3:50 PM CSTWind Chill AdvisoryFSD32 hr
Dec 30, 2:59 AM CSTWind Chill WarningFSD57 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 archive20162018

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.