Alert archive / South Dakota / Beadle County

Weather alerts in Beadle County, South Dakota, 2021

90 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Beadle County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts
90
Warnings
18
Watches
12
Advisories
45
Busiest month
August12 alerts
Busiest day
October 9, 20216 alerts

Over time

By month

Warning verification

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

Beadle County, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings8450%520%0 min
Flash flood warnings00

Each office's whole area, 2021

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Sioux Falls, SD: tornado warnings24388%850%10 min
NWS Sioux Falls, SD: severe thunderstorm warnings17611734%29285%20 min
NWS Sioux Falls, SD: flash flood warnings7357%989%51 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 1, 5:56 PM CSTDense Fog AdvisoryFSD21 hr
Jan 5, 2:26 PM CSTWinter Weather AdvisoryFSD24 hr
Jan 8, 2:30 PM CSTDense Fog AdvisoryFSD22 hr
Jan 12, 2:37 PM CSTHigh Wind WatchFSD25 hr
Jan 13, 3:32 PM CSTHigh Wind WarningFSD44 hr
Jan 22, 4:05 AM CSTWinter Weather AdvisoryFSD44 hr
Jan 29, 2:05 PM CSTWinter Weather AdvisoryFSD34 hr
Feb 1, 11:39 PM CSTDense Fog AdvisoryFSD11 hr
Feb 2, 9:16 PM CSTDense Fog AdvisoryFSD16 hr
Feb 11, 2:45 PM CSTWind Chill AdvisoryFSD21 hr
Feb 12, 2:09 PM CSTWind Chill WatchFSD61 hr
Feb 12, 2:09 PM CSTWind Chill AdvisoryFSD22 hr
Feb 13, 3:35 AM CSTWind Chill WarningFSD3 days
Feb 22, 3:18 AM CSTWind AdvisoryFSD15 hr
Mar 5, 4:11 AM CSTDense Fog AdvisoryFSD6 hr
Mar 6, 4:20 AM CSTDense Fog AdvisoryFSD4 hr
Mar 9, 3:55 AM CSTWinter Weather AdvisoryFSD44 hr
Mar 14, 4:03 AM CDTWinter Weather AdvisoryFSD30 hr
Mar 14, 6:20 PM CDTMesoscale DiscussionSPC6 hr
Mar 27, 3:31 PM CDTFire Weather WatchFSD23 hr
Mar 28, 2:40 PM CDTWind AdvisoryFSD30 hr
Mar 28, 2:47 PM CDTRed Flag WarningFSD30 hr
Mar 29, 3:18 PM CDTRed Flag WarningFSD30 hr
Mar 30, 10:59 AM CDTWind AdvisoryFSD10 hr
Mar 31, 2:41 PM CDTRed Flag WarningFSD31 hr
Apr 3, 4:09 AM CDTRed Flag WarningFSD17 hr
Apr 12, 9:37 AM CDTWind AdvisoryFSD9 hr
May 3, 2:28 PM CDTFrost AdvisoryFSD18 hr
May 5, 2:24 PM CDTFrost AdvisoryFSD18 hr
May 6, 3:02 PM CDTFrost AdvisoryFSD17 hr
May 9, 3:22 PM CDTFrost AdvisoryFSD17 hr
May 10, 3:12 PM CDTFrost AdvisoryFSD17 hr
May 30, 4:08 AM CDTDense Fog AdvisoryFSD5 hr
Jun 10, 3:31 AM CDTHeat AdvisoryFSD16 hr
Jun 11, 12:52 AM CDTMesoscale DiscussionSPC53 min
Jun 11, 2:15 AM CDTSevere Thunderstorm WatchSPC5 hr
Jun 11, 3:26 AM CDTSevere Thunderstorm WarningFSD64 min
Jun 11, 4:37 AM CDTMesoscale DiscussionSPC83 min
Jun 14, 1:35 AM CDTSevere Thunderstorm WarningFSD25 min
Jun 15, 2:43 PM CDTHeat AdvisoryFSD29 hr
Jul 3, 2:15 PM CDTHeat AdvisoryFSD30 hr
Jul 8, 8:54 PM CDTMesoscale DiscussionSPC2 hr
Jul 8, 9:33 PM CDTSevere Thunderstorm WatchSPC5 hr
Jul 9, 2:41 AM CDTMesoscale DiscussionSPC34 min
Jul 23, 5:04 PM CDTMesoscale DiscussionSPC3 hr
Jul 23, 9:07 PM CDTMesoscale DiscussionSPC2 hr
Jul 25, 7:19 PM CDTSevere Thunderstorm WarningFSD26 min
Jul 26, 3:11 AM CDTExcessive Heat WatchFSD35 hr
Jul 26, 3:11 AM CDTHeat AdvisoryFSD42 hr
Jul 27, 2:22 PM CDTHeat AdvisoryFSD31 hr
Jul 31, 1:02 AM CDTDense Fog AdvisoryFSD8 hr
Aug 6, 10:08 PM CDTSevere Thunderstorm WatchSPC4 hr
Aug 6, 11:54 PM CDTMesoscale DiscussionSPC2 hr
Aug 22, 2:21 PM CDTMesoscale DiscussionSPC2 hr
Aug 22, 3:36 PM CDTSevere Thunderstorm WatchSPC5 hr
Aug 22, 5:59 PM CDTMesoscale DiscussionSPC91 min
Aug 23, 7:38 PM CDTMesoscale DiscussionSPC2 hr
Aug 23, 9:37 PM CDTMesoscale DiscussionSPC113 min
Aug 26, 8:36 AM CDTMesoscale DiscussionSPC84 min
Aug 26, 9:05 AM CDTSevere Thunderstorm WatchSPC4 hr
Aug 26, 9:18 AM CDTSevere Thunderstorm Warning Considerable damage threatFSD57 min
Aug 26, 8:03 PM CDTSevere Thunderstorm WatchSPC7 hr
Aug 30, 11:19 PM CDTSevere Thunderstorm WarningFSD41 min
Oct 9, 12:04 PM CDTMesoscale DiscussionSPC2 hr
Oct 9, 2:56 PM CDTSevere Thunderstorm WatchSPC7 hr
Oct 9, 3:39 PM CDTSevere Thunderstorm WarningFSD51 min
Oct 9, 3:40 PM CDTMesoscale DiscussionSPC95 min
Oct 9, 4:23 PM CDTSevere Thunderstorm WarningFSD52 min
Oct 9, 5:08 PM CDTSevere Thunderstorm WarningFSD52 min
Oct 13, 2:53 AM CDTWind AdvisoryFSD20 hr
Oct 15, 3:30 AM CDTFrost AdvisoryFSD30 hr
Oct 15, 3:00 PM CDTFreeze WarningFSD19 hr
Oct 26, 3:10 AM CDTWind AdvisoryFSD16 hr
Nov 10, 2:54 PM CSTHigh Wind WarningFSD39 hr
Nov 10, 2:54 PM CSTWind AdvisoryFSD51 hr
Nov 11, 3:11 AM CSTWinter Weather AdvisoryFSD33 hr
Nov 11, 2:42 PM CSTWind AdvisoryFSD27 hr
Nov 13, 5:00 PM CSTHigh Wind WarningFSD4 hr
Nov 13, 5:00 PM CSTWind AdvisoryFSD10 hr
Nov 17, 3:00 AM CSTWind AdvisoryFSD15 hr
Dec 4, 3:11 PM CSTWind AdvisoryFSD35 hr
Dec 9, 11:23 AM CSTWinter Weather AdvisoryFSD40 hr
Dec 14, 4:04 AM CSTHigh Wind WatchFSD11 hr
Dec 14, 4:04 AM CSTHigh Wind WarningFSD47 hr
Dec 14, 2:28 PM CSTWinter Weather AdvisoryFSD36 hr
Dec 14, 2:35 PM CSTWind AdvisoryFSD12 hr
Dec 15, 2:56 AM CSTDense Fog AdvisoryFSD6 hr
Dec 15, 9:01 AM CSTDense Fog AdvisoryFSD119 min
Dec 26, 1:52 PM CSTWind AdvisoryFSD22 hr
Dec 30, 9:16 PM CSTWinter Weather AdvisoryFSD18 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 archive20202022

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.