Alert archive / South Dakota / Hamlin County

Weather alerts in Hamlin County, South Dakota, 2011

113 weather alerts in 2011, 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 2011. Tap one for its archive.

Alerts
113
Warnings
24
Watches
24
Advisories
41
Busiest month
July25 alerts
Busiest day
May 30, 20118 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, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings5420%1100%33 min
Flash flood warnings00

Each office's whole area, 2011

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Aberdeen, SD: tornado warnings23578%1145%8 min
NWS Aberdeen, SD: severe thunderstorm warnings22414734%24285%21 min
NWS Aberdeen, SD: flash flood warnings18950%1771%202 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, 12:13 PM CSTWinter Weather AdvisoryABR4 hr
Jan 7, 1:15 PM CSTWinter Weather AdvisoryABR7 hr
Jan 18, 5:28 AM CSTWind Chill AdvisoryABR7 hr
Jan 19, 3:33 PM CSTWinter Weather AdvisoryABR17 hr
Jan 20, 9:00 AM CSTWind Chill AdvisoryABR12 hr
Jan 21, 3:15 AM CSTWind Chill AdvisoryABR12 hr
Jan 23, 8:17 AM CSTWind Chill AdvisoryABR4 hr
Jan 29, 3:26 PM CSTWinter Weather AdvisoryABR46 hr
Jan 31, 10:46 AM CSTWind Chill AdvisoryABR31 hr
Feb 1, 3:00 AM CSTWind Chill WarningABR33 hr
Feb 4, 3:36 PM CSTWinter Weather AdvisoryABR28 hr
Feb 7, 3:42 AM CSTWind Chill AdvisoryABR32 hr
Feb 8, 3:55 AM CSTWind Chill WarningABR8 hr
Feb 8, 4:16 PM CSTWind Chill AdvisoryABR19 hr
Feb 10, 3:22 AM CSTWind Chill AdvisoryABR6 hr
Feb 12, 12:07 PM CSTHigh Wind WatchABR16 hr
Feb 13, 4:01 AM CSTHigh Wind WarningABR17 hr
Feb 13, 9:07 PM CSTWind AdvisoryABR3 hr
Feb 17, 4:06 AM CSTWind AdvisoryABR15 hr
Feb 18, 3:49 AM CSTWinter Storm WatchABR24 hr
Feb 19, 3:29 AM CSTWinter Storm WarningABR11 hr
Feb 19, 2:48 PM CSTBlizzard WarningABR37 hr
Feb 20, 4:36 AM CSTMesoscale DiscussionSPC4 hr
Feb 20, 9:17 AM CSTMesoscale DiscussionSPC4 hr
Feb 23, 5:31 AM CSTDense Fog AdvisoryABR5 hr
Mar 8, 9:27 AM CSTWinter Weather AdvisoryABR18 hr
Mar 10, 5:35 AM CSTDense Fog AdvisoryABR3 hr
Mar 11, 3:54 AM CSTWind AdvisoryABR14 hr
Mar 11, 5:24 PM CSTBlizzard WarningABR13 hr
Mar 12, 8:57 AM CSTWinter Weather AdvisoryABR8 hr
Mar 19, 8:42 AM CDTAreal Flood WarningABR24 hr
Mar 20, 8:22 AM CDTDense Fog AdvisoryABR7 hr
Mar 20, 8:01 PM CDTAreal Flood WarningABR24 hr
Mar 21, 9:39 AM CDTRiver Flood WarningABR6 days
Mar 22, 9:59 AM CDTAreal Flood WarningABR6 days
Mar 22, 10:34 AM CDTWinter Storm WarningABR28 hr
Mar 28, 10:23 AM CDTAreal Flood WarningABR19 days
Apr 2, 2:59 PM CDTWind AdvisoryABR44 hr
Apr 3, 10:09 AM CDTRiver Flood WarningABR16 days
Apr 9, 5:04 AM CDTDense Fog AdvisoryABR5 hr
Apr 9, 6:57 PM CDTMesoscale DiscussionSPC63 min
Apr 14, 3:24 AM CDTWinter Weather AdvisoryABR36 hr
Apr 15, 10:28 PM CDTAreal Flood WarningABR24 days
Apr 29, 4:07 AM CDTWind AdvisoryABR15 hr
Apr 30, 4:14 AM CDTWind AdvisoryABR39 hr
May 15, 3:23 PM CDTFrost AdvisoryABR13 hr
May 29, 10:58 PM CDTSevere Thunderstorm WatchSPC6 hr
May 30, 2:46 AM CDTFlash Flood WatchABR18 hr
May 30, 2:52 AM CDTMesoscale DiscussionSPC113 min
May 30, 2:59 AM CDTHigh Wind WatchABR24 hr
May 30, 2:59 AM CDTWind AdvisoryABR11 hr
May 30, 1:40 PM CDTMesoscale DiscussionSPC95 min
May 30, 3:52 PM CDTTornado WatchSPC7 hr
May 30, 6:17 PM CDTMesoscale DiscussionSPC118 min
May 30, 8:23 PM CDTSevere Thunderstorm WarningABR21 min
May 30, 8:43 PM CDTTornado WatchSPC5 hr
May 31, 2:29 AM CDTWind AdvisoryABR18 hr
Jun 16, 3:52 PM CDTFlash Flood WatchABR30 hr
Jun 17, 4:51 PM CDTMesoscale DiscussionSPC84 min
Jun 17, 5:34 PM CDTTornado WatchSPC5 hr
Jun 19, 3:38 AM CDTFlash Flood WatchABR57 hr
Jun 29, 4:11 PM CDTHeat AdvisoryABR27 hr
Jun 30, 10:07 PM CDTSevere Thunderstorm WatchSPC3 hr
Jul 1, 12:59 PM CDTMesoscale DiscussionSPC61 min
Jul 1, 1:31 PM CDTSevere Thunderstorm WarningABR44 min
Jul 1, 2:08 PM CDTSevere Thunderstorm WatchSPC9 hr
Jul 4, 11:14 PM CDTMesoscale DiscussionSPC91 min
Jul 4, 11:41 PM CDTSevere Thunderstorm WatchSPC5 hr
Jul 10, 2:29 PM CDTTornado WatchSPC7 hr
Jul 10, 5:25 PM CDTMesoscale DiscussionSPC95 min
Jul 14, 11:53 AM CDTFlash Flood WatchABR15 hr
Jul 15, 3:15 AM CDTExcessive Heat WarningABR5 days
Jul 16, 6:47 AM CDTDense Fog AdvisoryABR3 hr
Jul 22, 3:00 PM CDTMesoscale DiscussionSPC90 min
Jul 22, 5:46 PM CDTMesoscale DiscussionSPC89 min
Jul 23, 1:41 AM CDTSevere Thunderstorm WatchSPC5 hr
Jul 25, 2:56 PM CDTMesoscale DiscussionSPC94 min
Jul 25, 9:33 PM CDTMesoscale DiscussionSPC57 min
Jul 26, 3:59 PM CDTMesoscale DiscussionSPC2 hr
Jul 26, 7:32 PM CDTTornado WatchSPC5 hr
Jul 26, 8:10 PM CDTMesoscale DiscussionSPC95 min
Jul 26, 9:11 PM CDTSevere Thunderstorm WarningABR49 min
Jul 30, 1:28 PM CDTSevere Thunderstorm WatchSPC112 min
Jul 30, 3:22 PM CDTMesoscale DiscussionSPC53 min
Jul 30, 3:56 PM CDTHeat AdvisoryABR54 hr
Jul 30, 5:31 PM CDTSevere Thunderstorm WatchSPC7 hr
Jul 31, 12:50 PM CDTMesoscale DiscussionSPC2 hr
Aug 1, 9:40 PM CDTMesoscale DiscussionSPC95 min
Aug 2, 12:42 AM CDTSevere Thunderstorm WatchSPC5 hr
Aug 2, 4:27 AM CDTSevere Thunderstorm WarningABR48 min
Aug 2, 5:04 AM CDTSevere Thunderstorm WarningABR41 min
Aug 6, 6:14 PM CDTMesoscale DiscussionSPC2 hr
Aug 12, 1:47 PM CDTSevere Thunderstorm WatchSPC6 hr
Aug 12, 3:44 PM CDTMesoscale DiscussionSPC91 min
Aug 18, 3:43 PM CDTMesoscale DiscussionSPC92 min
Aug 28, 5:16 AM CDTMesoscale DiscussionSPC2 hr
Sep 13, 3:42 AM CDTFreeze WatchABR12 hr
Sep 13, 3:20 PM CDTFreeze WarningABR41 hr
Sep 19, 3:13 AM CDTHigh Wind WatchABR12 hr
Sep 19, 3:03 PM CDTHigh Wind WarningABR24 hr
Sep 19, 3:03 PM CDTWind AdvisoryABR31 hr
Oct 4, 3:14 PM CDTWind AdvisoryABR68 hr
Oct 6, 3:04 PM CDTHigh Wind WarningABR29 hr
Nov 4, 3:38 AM CDTWind AdvisoryABR14 hr
Nov 4, 3:38 AM CDTWind AdvisoryABR39 hr
Nov 6, 3:19 AM CSTWind AdvisoryABR15 hr
Nov 15, 3:35 AM CSTWind AdvisoryABR13 hr
Nov 17, 2:46 PM CSTWinter Storm WatchABR25 hr
Nov 18, 2:43 PM CSTWinter Storm WarningABR24 hr
Nov 19, 6:11 AM CSTMesoscale DiscussionSPC4 hr
Nov 25, 2:59 AM CSTWind AdvisoryABR39 hr
Dec 14, 5:48 AM CSTDense Fog AdvisoryABR5 hr
Dec 30, 2:09 PM CSTWind AdvisoryABR52 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 archive20102012

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.