Alert archive / Minnesota / Clearwater County

Weather alerts in Clearwater County, Minnesota, 2017

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

Clearwater County and its neighbors

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

Alerts
103
Warnings
24
Watches
12
Advisories
35
Busiest month
June22 alerts
Busiest day
July 21, 20178 alerts

Over time

By month

Warning verification

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

Clearwater County, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings14140%10100%43 min
Flash flood warnings00

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Grand Forks, ND: tornado warnings392438%6767%15 min
NWS Grand Forks, ND: severe thunderstorm warnings1481377%43576%26 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, 3:27 PM CSTWinter Weather AdvisoryFGF45 hr
Jan 2, 4:14 AM CSTWinter Storm WarningFGF32 hr
Jan 3, 2:18 PM CSTWind Chill AdvisoryFGF70 hr
Jan 6, 2:54 PM CSTWind Chill AdvisoryFGF21 hr
Jan 7, 3:30 PM CSTWind Chill AdvisoryFGF18 hr
Jan 10, 2:55 PM CSTWind Chill AdvisoryFGF45 hr
Jan 12, 2:49 PM CSTWind Chill WarningFGF21 hr
Jan 19, 1:27 AM CSTDense Fog AdvisoryFGF11 hr
Jan 21, 5:53 PM CSTDense Fog AdvisoryFGF18 hr
Jan 22, 12:03 PM CSTDense Fog AdvisoryFGF3 hr
Jan 22, 3:35 PM CSTDense Fog AdvisoryFGF7 hr
Jan 29, 3:10 PM CSTWinter Weather AdvisoryFGF23 hr
Feb 6, 3:11 PM CSTWinter Weather AdvisoryFGF22 hr
Feb 7, 2:22 PM CSTWind Chill AdvisoryFGF43 hr
Feb 8, 3:20 PM CSTWind Chill AdvisoryFGF18 hr
Mar 6, 3:33 PM CSTWind AdvisoryFGF41 hr
Mar 9, 3:34 AM CSTWind Chill AdvisoryFGF29 hr
Apr 13, 3:51 AM CDTDense Fog AdvisoryFGF6 hr
Apr 25, 3:25 PM CDTWinter Weather AdvisoryFGF39 hr
May 5, 4:59 AM CDTRed Flag WarningFGF14 hr
May 10, 3:10 PM CDTFrost AdvisoryFGF16 hr
May 18, 3:11 PM CDTFrost AdvisoryFGF17 hr
Jun 7, 1:36 PM CDTMesoscale DiscussionSPC2 hr
Jun 7, 2:11 PM CDTTornado WatchSPC4 hr
Jun 7, 4:28 PM CDTSpecial Weather StatementFGF32 min
Jun 7, 5:07 PM CDTSpecial Weather StatementFGF23 min
Jun 7, 5:30 PM CDTMesoscale DiscussionSPC60 min
Jun 7, 6:00 PM CDTSpecial Weather StatementFGF60 min
Jun 9, 9:30 PM CDTMesoscale DiscussionSPC60 min
Jun 10, 12:30 AM CDTSevere Thunderstorm WarningFGF30 min
Jun 10, 12:59 AM CDTSevere Thunderstorm WarningFGF46 min
Jun 10, 1:40 AM CDTSevere Thunderstorm WarningFGF46 min
Jun 13, 3:06 PM CDTSevere Thunderstorm WarningFGF54 min
Jun 13, 3:59 PM CDTSevere Thunderstorm WarningFGF61 min
Jun 13, 5:56 PM CDTSevere Thunderstorm WatchSPC7 hr
Jun 13, 9:37 PM CDTSevere Thunderstorm WarningFGF53 min
Jun 13, 10:13 PM CDTSpecial Weather StatementFGF62 min
Jun 17, 1:44 PM CDTSpecial Weather StatementFGF61 min
Jun 21, 3:35 PM CDTMesoscale DiscussionSPC2 hr
Jun 21, 5:08 PM CDTSevere Thunderstorm WatchSPC5 hr
Jun 21, 6:30 PM CDTSevere Thunderstorm WarningFGF60 min
Jun 21, 7:23 PM CDTSevere Thunderstorm WarningFGF43 min
Jun 21, 7:25 PM CDTMesoscale DiscussionSPC2 hr
Jun 21, 9:07 PM CDTMesoscale DiscussionSPC53 min
Jul 4, 3:33 PM CDTMesoscale DiscussionSPC2 hr
Jul 4, 6:03 PM CDTSevere Thunderstorm WatchSPC8 hr
Jul 4, 9:21 PM CDTMesoscale DiscussionSPC84 min
Jul 5, 5:52 PM CDTMesoscale DiscussionSPC2 hr
Jul 5, 9:51 PM CDTMesoscale DiscussionSPC114 min
Jul 5, 10:12 PM CDTSevere Thunderstorm WatchSPC6 hr
Jul 6, 12:51 AM CDTMesoscale DiscussionSPC114 min
Jul 6, 2:53 AM CDTSevere Thunderstorm WarningFGF52 min
Jul 11, 4:48 PM CDTTornado WatchSPC6 hr
Jul 18, 1:26 AM CDTSpecial Weather StatementFGF34 min
Jul 21, 12:47 PM CDTMesoscale DiscussionSPC88 min
Jul 21, 2:20 PM CDTMesoscale DiscussionSPC2 hr
Jul 21, 3:07 PM CDTSevere Thunderstorm WatchSPC10 hr
Jul 21, 3:53 PM CDTMesoscale DiscussionSPC97 min
Jul 21, 4:15 PM CDTSevere Thunderstorm WarningFGF60 min
Jul 21, 4:51 PM CDTSevere Thunderstorm WarningFGF54 min
Jul 21, 5:29 PM CDTSevere Thunderstorm WarningFGF61 min
Jul 21, 5:44 PM CDTSevere Thunderstorm WarningFGF35 min
Aug 3, 2:57 PM CDTSpecial Weather StatementFGF63 min
Sep 3, 6:55 PM CDTMesoscale DiscussionSPC2 hr
Sep 4, 1:52 PM CDTSpecial Weather StatementFGF53 min
Sep 19, 6:36 PM CDTMesoscale DiscussionSPC114 min
Sep 19, 8:56 PM CDTMesoscale DiscussionSPC2 hr
Sep 19, 9:02 PM CDTSevere Thunderstorm WarningFGF58 min
Sep 19, 10:36 PM CDTSevere Thunderstorm WatchSPC4 hr
Sep 19, 10:49 PM CDTSpecial Weather StatementFGF26 min
Sep 19, 11:02 PM CDTSpecial Weather StatementFGF28 min
Sep 19, 11:18 PM CDTSpecial Weather StatementFGF27 min
Sep 19, 11:32 PM CDTSpecial Weather StatementFGF58 min
Sep 19, 11:49 PM CDTSpecial Weather StatementFGF56 min
Sep 22, 8:43 PM CDTMesoscale DiscussionSPC2 hr
Oct 4, 3:06 PM CDTFrost AdvisoryFGF18 hr
Oct 5, 2:51 PM CDTFrost AdvisoryFGF18 hr
Oct 5, 2:51 PM CDTFreeze WarningFGF18 hr
Oct 7, 5:27 AM CDTDense Fog AdvisoryFGF5 hr
Oct 8, 3:23 PM CDTFrost AdvisoryFGF18 hr
Oct 8, 3:23 PM CDTFreeze WatchFGF12 hr
Oct 9, 3:01 AM CDTFreeze WarningFGF30 hr
Oct 17, 2:32 PM CDTFire Weather WatchFGF13 hr
Oct 18, 3:41 AM CDTRed Flag WarningFGF15 hr
Oct 26, 4:33 AM CDTWinter Weather AdvisoryFGF29 hr
Nov 3, 3:30 AM CDTWinter Weather AdvisoryFGF43 hr
Nov 4, 12:46 PM CDTWinter Weather AdvisoryFGF119 min
Nov 13, 9:19 PM CSTDense Fog AdvisoryFGF15 hr
Nov 14, 7:12 PM CSTDense Fog AdvisoryFGF5 hr
Nov 28, 3:23 AM CSTWind AdvisoryFGF15 hr
Dec 3, 3:54 AM CSTWinter Storm WatchFGF24 hr
Dec 3, 3:14 PM CSTWinter Storm WarningFGF32 hr
Dec 4, 12:11 PM CSTMesoscale DiscussionSPC4 hr
Dec 4, 6:18 PM CSTWinter Weather AdvisoryFGF5 hr
Dec 12, 3:02 PM CSTWinter Weather AdvisoryFGF21 hr
Dec 18, 7:25 AM CSTWinter Weather AdvisoryFGF8 hr
Dec 19, 2:14 PM CSTWinter Weather AdvisoryFGF38 hr
Dec 20, 7:30 PM CSTWinter Storm WarningFGF8 hr
Dec 23, 9:41 PM CSTWind Chill WatchFGF13 hr
Dec 24, 10:55 AM CSTWind Chill WarningFGF49 hr
Dec 24, 10:55 AM CSTWind Chill AdvisoryFGF3 days
Dec 28, 3:42 PM CSTWind Chill AdvisoryFGF26 hr
Dec 29, 2:37 AM CSTWind Chill WarningFGF3 days

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.