Alert archive / Colorado / Gilpin County

Weather alerts in Gilpin County, Colorado, 2018

78 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Gilpin County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts
78
Warnings
25
Watches
12
Advisories
31
Busiest month
April13 alerts
Busiest day
April 19, 20184 alerts

Over time

By month

Warning verification

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

Gilpin County, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings10100%0
Flash flood warnings00

Each office's whole area, 2018

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Denver/Boulder, CO: tornado warnings521179%3653%12 min
NWS Denver/Boulder, CO: severe thunderstorm warnings32211465%36975%20 min
NWS Denver/Boulder, CO: flash flood warnings13377%1479%32 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 6, 3:35 AM MSTWinter Weather AdvisoryBOU25 hr
Jan 9, 4:19 AM MSTWinter Weather AdvisoryBOU44 hr
Jan 11, 10:44 AM MSTWinter Weather AdvisoryBOU28 hr
Jan 19, 1:54 PM MSTWinter Storm WatchBOU16 hr
Jan 20, 5:24 AM MSTWinter Storm WarningBOU36 hr
Jan 30, 7:05 PM MSTHigh Wind WarningBOU8 hr
Feb 2, 4:13 PM MSTWinter Weather AdvisoryBOU43 hr
Feb 4, 2:26 PM MSTWinter Weather AdvisoryBOU37 hr
Feb 5, 4:32 PM MSTWinter Storm WarningBOU11 hr
Feb 6, 3:16 AM MSTWinter Weather AdvisoryBOU7 hr
Feb 9, 3:18 PM MSTWinter Weather AdvisoryBOU26 hr
Feb 9, 5:37 PM MSTDense Fog AdvisoryBOU3 hr
Feb 14, 3:19 AM MSTWinter Storm WarningBOU39 hr
Feb 15, 3:52 PM MSTHigh Wind WatchBOU17 hr
Feb 16, 9:13 AM MSTHigh Wind WarningBOU49 hr
Feb 18, 2:01 PM MSTWinter Weather AdvisoryBOU34 hr
Mar 3, 3:03 PM MSTWinter Weather AdvisoryBOU41 hr
Mar 3, 3:17 PM MSTRed Flag WarningBOU28 hr
Mar 15, 3:45 AM MDTWinter Weather AdvisoryBOU25 hr
Mar 15, 3:54 AM MDTHigh Wind WatchBOU11 hr
Mar 17, 2:40 PM MDTWinter Weather AdvisoryBOU37 hr
Mar 22, 4:43 AM MDTWinter Weather AdvisoryBOU37 hr
Mar 26, 4:27 AM MDTWinter Weather AdvisoryBOU24 hr
Apr 2, 1:46 PM MDTHigh Wind WarningBOU21 hr
Apr 5, 4:01 AM MDTWinter Weather AdvisoryBOU44 hr
Apr 7, 4:26 AM MDTWinter Storm WarningBOU29 hr
Apr 10, 3:44 AM MDTRed Flag WarningBOU39 hr
Apr 10, 3:44 AM MDTRed Flag WarningBOU65 hr
Apr 11, 3:08 PM MDTWinter Weather AdvisoryBOU54 hr
Apr 16, 3:45 AM MDTRed Flag WarningBOU42 hr
Apr 17, 4:58 AM MDTHigh Wind WarningBOU16 hr
Apr 18, 8:27 PM MDTRed Flag WarningBOU24 hr
Apr 19, 4:41 AM MDTWinter Storm WatchBOU11 hr
Apr 19, 3:14 PM MDTWinter Storm WarningBOU28 hr
Apr 19, 3:14 PM MDTWinter Weather AdvisoryBOU44 hr
Apr 29, 2:53 PM MDTRed Flag WarningBOU28 hr
May 2, 4:56 AM MDTWinter Weather AdvisoryBOU31 hr
May 11, 10:58 PM MDTDense Fog AdvisoryBOU10 hr
May 13, 12:22 AM MDTDense Fog AdvisoryBOU9 hr
May 18, 3:48 AM MDTWinter Storm WatchBOU11 hr
May 18, 11:02 AM MDTFlash Flood WatchBOU30 hr
May 18, 2:21 PM MDTSpecial Weather StatementBOU39 min
May 18, 2:29 PM MDTWinter Weather AdvisoryBOU13 hr
May 28, 2:01 PM MDTSevere Thunderstorm WatchSPC7 hr
May 31, 6:20 PM MDTRed Flag WarningBOU27 hr
Jun 8, 3:17 PM MDTFire Weather WatchBOU18 hr
Jun 9, 9:00 AM MDTRed Flag WarningBOU37 hr
Jun 14, 3:27 AM MDTRed Flag WarningBOU17 hr
Jun 27, 3:39 AM MDTRed Flag WarningBOU42 hr
Jun 28, 2:42 PM MDTRed Flag WarningBOU28 hr
Jul 3, 4:03 AM MDTRed Flag WarningBOU16 hr
Jul 5, 10:16 AM MDTFlash Flood WatchBOU9 hr
Jul 12, 1:33 PM MDTSpecial Weather StatementBOU42 min
Jul 15, 4:14 AM MDTFlash Flood WatchBOU16 hr
Jul 23, 1:00 PM MDTMesoscale DiscussionSPC90 min
Jul 25, 12:48 PM MDTMesoscale DiscussionSPC57 min
Jul 25, 5:08 PM MDTMesoscale DiscussionSPC2 hr
Jul 26, 6:07 PM MDTMesoscale DiscussionSPC113 min
Aug 3, 8:16 PM MDTSpecial Weather StatementBOU44 min
Aug 3, 8:39 PM MDTSevere Thunderstorm WarningBOU51 min
Aug 6, 5:24 PM MDTMesoscale DiscussionSPC66 min
Aug 6, 8:06 PM MDTMesoscale DiscussionSPC54 min
Aug 14, 5:31 PM MDTMesoscale DiscussionSPC119 min
Aug 26, 3:58 AM MDTFire Weather WatchBOU12 hr
Aug 26, 3:35 PM MDTRed Flag WarningBOU26 hr
Sep 28, 10:32 AM MDTRed Flag WarningBOU32 hr
Oct 9, 3:24 PM MDTWinter Weather AdvisoryBOU30 hr
Oct 10, 2:24 PM MDTWinter Weather AdvisoryBOU34 hr
Oct 12, 2:20 PM MDTWinter Weather AdvisoryBOU49 hr
Oct 29, 3:56 AM MDTWinter Weather AdvisoryBOU50 hr
Nov 1, 3:02 PM MDTWinter Weather AdvisoryBOU49 hr
Nov 3, 3:32 PM MDTWinter Weather AdvisoryBOU44 hr
Nov 10, 4:18 AM MSTWinter Weather AdvisoryBOU44 hr
Nov 16, 10:36 AM MSTWinter Weather AdvisoryBOU34 hr
Nov 21, 2:50 PM MSTWinter Storm WatchBOU25 hr
Nov 22, 3:49 PM MSTWinter Storm WarningBOU58 hr
Dec 18, 10:08 AM MSTWinter Weather AdvisoryBOU31 hr
Dec 30, 1:56 PM MSTWinter Weather AdvisoryBOU27 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 archive20172019

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.