Alert archive / Minnesota / Rock County

Weather alerts in Rock County, Minnesota, 2026

110 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Rock County and its neighbors

Each county as a circle sized by its count in 2026. Tap one for its archive.

Alerts
110
Warnings
35
Watches
20
Advisories
26
Busiest month
May22 alerts
Busiest day
May 17, 20267 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 Rock County in 2026 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.

Rock County, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%10%
Severe thunderstorm warnings191616%7100%29 min
Flash flood warnings00

Each office's whole area, 2026

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Sioux Falls, SD: tornado warnings401368%2365%12 min
NWS Sioux Falls, SD: severe thunderstorm warnings29219434%54989%21 min
NWS Sioux Falls, SD: flash flood warnings16475%580%12 min

An office's figures cover every county it serves, including across state lines.

The year is still running; reports filed late and damage surveys can still change these figures.

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 4, 9:15 PM CSTDense Fog AdvisoryFSD12 hr
Jan 5, 9:42 PM CSTDense Fog AdvisoryFSD9 hr
Jan 15, 1:59 PM CSTWinter Weather AdvisoryFSD34 hr
Jan 17, 2:21 PM CSTWinter Weather AdvisoryFSD34 hr
Jan 20, 1:23 PM CSTExtreme Cold WatchFSD37 hr
Jan 20, 1:23 PM CSTWind AdvisoryFSD21 hr
Jan 20, 1:23 PM CSTWinter Weather AdvisoryFSD29 hr
Jan 21, 10:13 AM CSTBlizzard WarningFSD8 hr
Jan 22, 2:28 AM CSTExtreme Cold WarningFSD33 hr
Jan 23, 2:17 AM CSTCold Weather AdvisoryFSD31 hr
Jan 25, 2:13 AM CSTCold Weather AdvisoryFSD32 hr
Feb 17, 2:43 AM CSTWind AdvisoryFSD36 hr
Feb 17, 2:38 PM CSTFire Weather WatchFSD7 hr
Feb 17, 10:06 PM CSTRed Flag WarningFSD20 hr
Feb 26, 2:41 AM CSTDense Fog AdvisoryFSD7 hr
Mar 3, 11:43 PM CSTDense Fog AdvisoryFSD8 hr
Mar 4, 8:30 AM CSTDense Fog AdvisoryFSD3 hr
Mar 5, 1:55 PM CSTWinter Weather AdvisoryFSD41 hr
Mar 6, 6:22 AM CSTDense Fog AdvisoryFSD5 hr
Mar 10, 11:57 PM CDTHigh Wind WatchFSD21 hr
Mar 11, 1:59 PM CDTHigh Wind WarningFSD41 hr
Mar 12, 2:35 PM CDTWinter Storm WatchFSD47 hr
Mar 13, 9:20 PM CDTBlizzard WarningFSD56 hr
Mar 15, 9:49 AM CDTMesoscale DiscussionSPC6 hr
Mar 15, 2:31 PM CDTCold Weather AdvisoryFSD20 hr
Mar 26, 1:57 PM CDTFire Weather WatchFSD21 hr
Mar 27, 11:17 AM CDTRed Flag WarningFSD34 hr
Apr 11, 1:52 PM CDTRed Flag WarningFSD29 hr
Apr 13, 2:59 PM CDTMesoscale DiscussionSPC91 min
Apr 13, 4:39 PM CDTSevere Thunderstorm WatchSPC5 hr
Apr 13, 6:40 PM CDTSevere Thunderstorm WarningFSD50 min
Apr 15, 12:28 PM CDTFire Weather WatchFSD9 hr
Apr 15, 12:28 PM CDTRed Flag WarningFSD32 hr
Apr 20, 1:35 AM CDTRed Flag WarningFSD18 hr
Apr 21, 12:54 PM CDTRed Flag WarningFSD31 hr
Apr 30, 1:36 PM CDTFrost AdvisoryFSD18 hr
May 1, 1:06 PM CDTFreeze WarningFSD19 hr
May 5, 1:19 PM CDTFreeze WarningFSD18 hr
May 9, 1:36 PM CDTFrost AdvisoryFSD19 hr
May 10, 1:08 PM CDTFrost AdvisoryFSD19 hr
May 11, 3:07 PM CDTRed Flag WarningFSD30 hr
May 13, 1:54 PM CDTRed Flag WarningFSD30 hr
May 17, 1:11 PM CDTMesoscale DiscussionSPC2 hr
May 17, 1:42 PM CDTTornado WatchSPC8 hr
May 17, 3:31 PM CDTMesoscale DiscussionSPC89 min
May 17, 4:18 PM CDTSevere Thunderstorm Warning Considerable damage threatFSD42 min
May 17, 4:56 PM CDTSevere Thunderstorm Warning Considerable damage threatFSD49 min
May 17, 5:33 PM CDTTornado WarningFSD42 min
May 17, 5:43 PM CDTSevere Thunderstorm Warning Considerable damage threatFSD62 min
May 18, 5:10 PM CDTMesoscale DiscussionSPC95 min
May 19, 2:43 AM CDTFrost AdvisoryFSD29 hr
May 24, 3:34 PM CDTMesoscale DiscussionSPC86 min
May 24, 4:53 PM CDTSevere Thunderstorm WatchSPC6 hr
May 24, 6:49 PM CDTMesoscale DiscussionSPC116 min
May 24, 8:48 PM CDTMesoscale DiscussionSPC87 min
May 24, 11:29 PM CDTSevere Thunderstorm WarningFSD46 min
May 25, 7:13 PM CDTMesoscale DiscussionSPC92 min
May 31, 3:20 PM CDTMesoscale DiscussionSPC2 hr
May 31, 9:38 PM CDTSevere Thunderstorm WatchSPC4 hr
Jun 4, 3:12 PM CDTMesoscale DiscussionSPC93 min
Jun 9, 8:36 PM CDTTornado WatchSPC5 hr
Jun 15, 3:20 PM CDTMesoscale DiscussionSPC115 min
Jun 16, 12:40 PM CDTWind AdvisoryFSD31 hr
Jun 16, 11:28 PM CDTMesoscale DiscussionSPC2 hr
Jun 17, 4:43 PM CDTSevere Thunderstorm WarningFSD32 min
Jun 17, 5:10 PM CDTSevere Thunderstorm WarningFSD50 min
Jun 27, 12:59 AM CDTHeat AdvisoryFSD68 hr
Jun 28, 2:37 AM CDTMesoscale DiscussionSPC113 min
Jun 28, 4:24 AM CDTSevere Thunderstorm WarningFSD66 min
Jun 28, 4:51 AM CDTSevere Thunderstorm WatchSPC4 hr
Jun 28, 5:00 AM CDTSevere Thunderstorm Warning Considerable damage threatFSD60 min
Jun 29, 4:00 PM CDTMesoscale DiscussionSPC3 hr
Jun 29, 6:33 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 29, 8:59 PM CDTMesoscale DiscussionSPC91 min
Jun 29, 11:55 PM CDTSevere Thunderstorm WatchSPC4 hr
Jul 1, 12:03 AM CDTSevere Thunderstorm WatchSPC6 hr
Jul 1, 3:06 AM CDTSevere Thunderstorm WarningFSD39 min
Jul 1, 3:29 AM CDTMesoscale DiscussionSPC91 min
Jul 1, 3:40 AM CDTSevere Thunderstorm Warning Considerable damage threatFSD65 min
Jul 1, 4:47 AM CDTSevere Thunderstorm WarningFSD26 min
Jul 2, 5:52 PM CDTMesoscale DiscussionSPC83 min
Jul 2, 6:08 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 2, 8:47 PM CDTMesoscale DiscussionSPC118 min
Jul 10, 3:56 PM CDTMesoscale DiscussionSPC2 hr
Jul 17, 1:31 AM CDTHeat AdvisoryFSD19 hr
Jul 19, 1:05 PM CDTHeat AdvisoryFSD31 hr
Jul 24, 11:23 AM CDTHeat AdvisoryFSD29 hr
Jul 24, 11:24 PM CDTExtreme Heat WarningFSD46 hr
Jul 25, 7:45 PM CDTMesoscale DiscussionSPC2 hr
Jul 25, 7:58 PM CDTSevere Thunderstorm WatchSPC4 hr
Jul 25, 8:33 PM CDTSevere Thunderstorm WarningFSD42 min
Jul 25, 8:53 PM CDTSevere Thunderstorm Warning Destructive damage threatFSD37 min
Jul 25, 9:07 PM CDTMesoscale DiscussionSPC83 min
Jul 25, 9:26 PM CDTSevere Thunderstorm Warning Considerable damage threatFSD34 min
Jul 25, 9:53 PM CDTSevere Thunderstorm WarningFSD37 min
Jul 27, 4:10 AM CDTDense Fog AdvisoryFSD4 hr
Aug 6, 12:55 AM CDTDense Fog AdvisoryFSD9 hr
Aug 7, 5:23 AM CDTMesoscale DiscussionSPC3 hr
Aug 11, 1:15 AM CDTMesoscale DiscussionSPC2 hr
Aug 18, 2:47 PM CDTMesoscale DiscussionSPC118 min
Aug 18, 5:39 PM CDTSevere Thunderstorm WarningFSD36 min
Aug 20, 5:31 PM CDTMesoscale DiscussionSPC119 min
Aug 20, 7:13 PM CDTMesoscale DiscussionSPC62 min
Sep 1, 3:50 PM CDTSevere Thunderstorm WatchSPC9 hr
Sep 1, 10:02 PM CDTSevere Thunderstorm Warning Considerable damage threatFSD43 min
Sep 1, 10:34 PM CDTSevere Thunderstorm Warning Considerable damage threatFSD71 min
Sep 5, 12:48 AM CDTMesoscale DiscussionSPC117 min
Sep 6, 10:23 AM CDTFlood WatchFSD9 hr
Sep 11, 6:39 PM CDTSevere Thunderstorm WatchSPC3 hr
Sep 11, 8:36 PM CDTMesoscale DiscussionSPC114 min

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 archive2025

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.