Alert archive / South Dakota / Hamlin County

Weather alerts in Hamlin County, South Dakota, 2017

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

Hamlin County and its neighbors

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

Alerts
102
Warnings
27
Watches
13
Advisories
35
Busiest month
July25 alerts
Busiest day
July 12, 20179 alerts

Over time

By month

Warning verification

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

Hamlin County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings211814%1191%20 min
Flash flood warnings00

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Aberdeen, SD: tornado warnings19763%1663%15 min
NWS Aberdeen, SD: severe thunderstorm warnings20113831%30681%20 min
NWS Aberdeen, SD: flash flood warnings2150%520%64 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, 3:54 AM CSTWinter Weather AdvisoryABR50 hr
Jan 3, 11:34 AM CSTWind Chill AdvisoryABR68 hr
Jan 9, 3:12 PM CSTWinter Weather AdvisoryABR26 hr
Jan 10, 1:32 AM CSTFreezing Rain AdvisoryABR4 hr
Jan 12, 2:58 AM CSTWinter Weather AdvisoryABR12 hr
Jan 12, 3:07 PM CSTWind Chill AdvisoryABR16 hr
Jan 19, 12:34 AM CSTDense Fog AdvisoryABR11 hr
Jan 19, 3:05 PM CSTDense Fog AdvisoryABR21 hr
Jan 20, 3:02 PM CSTDense Fog AdvisoryABR22 hr
Jan 21, 6:07 PM CSTDense Fog AdvisoryABR18 hr
Jan 23, 1:50 PM CSTWinter Weather AdvisoryABR14 hr
Jan 24, 3:28 AM CSTWinter Weather AdvisoryABR27 hr
Jan 30, 2:48 AM CSTWind AdvisoryABR15 hr
Feb 22, 2:58 AM CSTWinter Storm WatchABR24 hr
Mar 5, 3:25 PM CSTHigh Wind WatchABR36 hr
Mar 6, 4:43 AM CSTWind AdvisoryABR51 hr
Mar 10, 3:30 PM CSTWinter Storm WatchABR31 hr
Mar 11, 10:38 PM CSTWinter Storm WarningABR25 hr
Mar 12, 7:14 AM CDTMesoscale DiscussionSPC6 hr
Mar 23, 12:54 PM CDTSpecial Weather StatementABR21 min
Mar 26, 5:34 AM CDTDense Fog AdvisoryABR4 hr
Apr 7, 9:50 AM CDTWind AdvisoryABR9 hr
Apr 12, 11:39 PM CDTDense Fog AdvisoryABR10 hr
Apr 15, 2:09 AM CDTDense Fog AdvisoryABR4 hr
Apr 29, 3:37 PM CDTWinter Storm WatchABR12 hr
Apr 30, 3:34 AM CDTWinter Weather AdvisoryABR31 hr
May 16, 2:32 AM CDTSpecial Weather StatementABR43 min
May 28, 3:54 PM CDTMesoscale DiscussionSPC66 min
May 28, 5:25 PM CDTSevere Thunderstorm WarningABR50 min
Jun 11, 2:02 AM CDTMesoscale DiscussionSPC58 min
Jun 11, 2:37 AM CDTSevere Thunderstorm WatchSPC5 hr
Jun 11, 4:52 AM CDTSevere Thunderstorm WarningABR38 min
Jun 11, 5:23 AM CDTSevere Thunderstorm WarningABR52 min
Jun 13, 7:07 AM CDTSevere Thunderstorm WarningABR25 min
Jun 13, 2:32 PM CDTMesoscale DiscussionSPC58 min
Jun 13, 3:13 PM CDTTornado WatchSPC7 hr
Jun 13, 5:43 PM CDTMesoscale DiscussionSPC2 hr
Jun 13, 7:10 PM CDTSevere Thunderstorm WarningABR65 min
Jun 13, 7:16 PM CDTSevere Thunderstorm WarningABR59 min
Jun 22, 2:56 AM CDTSpecial Weather StatementABR49 min
Jun 22, 3:08 AM CDTSevere Thunderstorm WarningABR67 min
Jun 22, 3:11 AM CDTMesoscale DiscussionSPC64 min
Jun 22, 3:35 AM CDTSevere Thunderstorm WarningABR25 min
Jul 5, 5:52 PM CDTMesoscale DiscussionSPC2 hr
Jul 11, 3:48 PM CDTMesoscale DiscussionSPC87 min
Jul 11, 6:26 PM CDTMesoscale DiscussionSPC2 hr
Jul 11, 6:31 PM CDTSevere Thunderstorm WarningABR59 min
Jul 11, 6:52 PM CDTSevere Thunderstorm WatchSPC5 hr
Jul 11, 7:00 PM CDTSevere Thunderstorm WarningABR45 min
Jul 11, 7:25 PM CDTSevere Thunderstorm WarningABR50 min
Jul 11, 7:51 PM CDTSevere Thunderstorm WarningABR39 min
Jul 11, 8:22 PM CDTSevere Thunderstorm WarningABR27 min
Jul 11, 9:36 PM CDTSevere Thunderstorm WarningABR24 min
Jul 11, 9:44 PM CDTSevere Thunderstorm WarningABR46 min
Jul 11, 9:49 PM CDTSevere Thunderstorm WarningABR41 min
Jul 11, 10:10 PM CDTMesoscale DiscussionSPC65 min
Jul 11, 10:28 PM CDTSevere Thunderstorm WarningABR47 min
Jul 17, 6:12 PM CDTSevere Thunderstorm WarningABR18 min
Jul 19, 9:55 AM CDTMesoscale DiscussionSPC2 hr
Jul 19, 10:24 AM CDTSevere Thunderstorm WatchSPC4 hr
Jul 21, 6:26 AM CDTSpecial Weather StatementABR34 min
Jul 21, 7:34 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 21, 11:27 PM CDTSevere Thunderstorm WarningABR63 min
Jul 22, 12:28 AM CDTSevere Thunderstorm WarningABR32 min
Jul 25, 2:41 PM CDTMesoscale DiscussionSPC2 hr
Jul 25, 3:08 PM CDTSpecial Weather StatementABR52 min
Jul 25, 3:22 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 25, 6:25 PM CDTMesoscale DiscussionSPC95 min
Aug 13, 9:49 AM CDTSpecial Weather StatementABR41 min
Aug 13, 11:25 AM CDTSpecial Weather StatementABR50 min
Aug 13, 11:29 AM CDTSevere Thunderstorm WarningABR32 min
Aug 18, 2:54 PM CDTMesoscale DiscussionSPC3 hr
Aug 21, 8:54 AM CDTAreal Flood WarningABR3 hr
Aug 25, 2:57 PM CDTMesoscale DiscussionSPC3 hr
Sep 19, 3:37 PM CDTTornado WatchSPC8 hr
Sep 19, 6:36 PM CDTMesoscale DiscussionSPC114 min
Sep 19, 8:56 PM CDTMesoscale DiscussionSPC2 hr
Sep 22, 3:57 PM CDTMesoscale DiscussionSPC2 hr
Sep 22, 7:58 PM CDTSpecial Weather StatementABR62 min
Oct 7, 5:30 AM CDTDense Fog AdvisoryABR4 hr
Oct 8, 3:28 AM CDTFreeze WatchABR23 hr
Oct 9, 2:46 AM CDTFreeze WarningABR30 hr
Oct 22, 3:03 PM CDTWind AdvisoryABR28 hr
Oct 25, 2:55 PM CDTWind AdvisoryABR45 hr
Nov 14, 1:19 AM CSTDense Fog AdvisoryABR11 hr
Nov 14, 7:36 PM CSTDense Fog AdvisoryABR3 hr
Nov 21, 12:43 AM CSTWind AdvisoryABR8 hr
Nov 29, 2:55 AM CSTWind AdvisoryABR21 hr
Dec 3, 3:38 AM CSTWinter Storm WatchABR12 hr
Dec 3, 3:08 PM CSTBlizzard WarningABR28 hr
Dec 4, 3:54 PM CSTMesoscale DiscussionSPC4 hr
Dec 4, 7:31 PM CSTWinter Weather AdvisoryABR4 hr
Dec 11, 2:47 AM CSTWind AdvisoryABR12 hr
Dec 12, 3:07 PM CSTWind AdvisoryABR23 hr
Dec 13, 5:13 PM CSTWinter Weather AdvisoryABR13 hr
Dec 14, 2:50 PM CSTWinter Weather AdvisoryABR5 hr
Dec 24, 4:01 AM CSTWind Chill AdvisoryABR32 hr
Dec 25, 4:09 AM CSTWind Chill AdvisoryABR32 hr
Dec 26, 1:37 PM CSTWind Chill AdvisoryABR21 hr
Dec 29, 2:18 AM CSTWind Chill WarningABR34 hr
Dec 29, 2:18 AM CSTWind Chill AdvisoryABR46 hr
Dec 30, 2:54 AM CSTWind Chill WarningABR57 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.