Alert archive / Colorado / Pitkin County

Weather alerts in Pitkin County, Colorado, 2023

95 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Pitkin County and its neighbors

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts
95
Warnings
18
Watches
24
Advisories
34
Busiest month
August17 alerts
Busiest day
August 24, 20235 alerts

Over time

By month

Warning verification

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

Pitkin County, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings00
Severe thunderstorm warnings040%
Flash flood warnings2150%0

Each office's whole area, 2023

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Grand Junction, CO: severe thunderstorm warnings14193%264%8 min
NWS Grand Junction, CO: flash flood warnings13285%3100%52 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 5, 1:02 PM MSTWinter Weather AdvisoryGJT40 hr
Jan 9, 1:43 PM MSTWinter Weather AdvisoryGJT55 hr
Jan 11, 6:17 AM MSTSpecial Weather StatementGJT58 min
Jan 13, 2:00 PM MSTWinter Weather AdvisoryGJT63 hr
Jan 16, 2:58 AM MSTWinter Weather AdvisoryGJT62 hr
Jan 26, 3:02 AM MSTWinter Weather AdvisoryGJT62 hr
Jan 28, 4:58 PM MSTWinter Weather AdvisoryGJT60 hr
Feb 8, 5:44 PM MSTMesoscale DiscussionSPC4 hr
Feb 13, 2:37 PM MSTWinter Weather AdvisoryGJT51 hr
Feb 19, 2:40 PM MSTWinter Storm WatchGJT25 hr
Feb 20, 3:40 PM MSTWinter Weather AdvisoryGJT4 days
Feb 22, 8:26 AM MSTMesoscale DiscussionSPC4 hr
Feb 22, 4:57 PM MSTSnow Squall Warning Significant damage threatGJT33 min
Feb 22, 5:45 PM MSTSnow Squall WarningGJT46 min
Feb 24, 7:38 AM MSTSpecial Weather StatementGJT37 min
Feb 27, 2:31 AM MSTWinter Weather AdvisoryGJT39 hr
Feb 28, 4:35 AM MSTWind AdvisoryGJT12 hr
Feb 28, 10:59 AM MSTSpecial Weather StatementGJT61 min
Mar 4, 2:31 PM MSTWind AdvisoryGJT29 hr
Mar 9, 2:18 AM MSTWinter Storm WatchGJT11 hr
Mar 9, 1:43 PM MSTWinter Storm WarningGJT63 hr
Mar 13, 2:50 PM MDTWinter Storm WatchGJT13 hr
Mar 14, 3:23 AM MDTWinter Weather AdvisoryGJT57 hr
Mar 18, 3:05 PM MDTWinter Storm WatchGJT37 hr
Mar 20, 4:18 AM MDTWinter Weather AdvisoryGJT68 hr
Mar 24, 7:12 PM MDTSpecial Weather StatementGJT63 min
Mar 29, 3:12 AM MDTWinter Weather AdvisoryGJT69 hr
Mar 29, 3:24 PM MDTWind AdvisoryGJT27 hr
Apr 1, 6:25 AM MDTWinter Storm WatchGJT33 hr
Apr 2, 2:27 AM MDTHigh Wind WarningGJT45 hr
Apr 2, 2:26 PM MDTWind AdvisoryGJT33 hr
Apr 2, 2:57 PM MDTWinter Weather AdvisoryGJT54 hr
Apr 13, 3:15 PM MDTWinter Weather AdvisoryGJT42 hr
Apr 17, 1:39 PM MDTWind AdvisoryGJT31 hr
Apr 20, 3:16 AM MDTWinter Weather AdvisoryGJT54 hr
Apr 23, 2:11 PM MDTWinter Weather AdvisoryGJT64 hr
Apr 27, 7:56 PM MDTSpecial Weather StatementGJT34 min
May 10, 2:46 AM MDTWinter Weather AdvisoryGJT45 hr
May 26, 2:17 PM MDTSpecial Weather StatementGJT43 min
Jun 7, 11:47 AM MDTSpecial Weather StatementGJT28 min
Jun 7, 12:18 PM MDTSpecial Weather StatementGJT27 min
Jun 18, 2:05 PM MDTWind AdvisoryGJT30 hr
Jun 25, 1:29 PM MDTRed Flag WarningGJT32 hr
Jun 25, 1:29 PM MDTRed Flag WarningGJT56 hr
Jun 26, 2:24 PM MDTWind AdvisoryGJT31 hr
Jun 27, 2:34 AM MDTFire Weather WatchGJT11 hr
Jun 27, 1:17 PM MDTFire Weather WatchGJT12 hr
Jun 27, 1:17 PM MDTRed Flag WarningGJT31 hr
Jun 28, 1:06 AM MDTRed Flag WarningGJT43 hr
Jul 2, 2:59 PM MDTFire Weather WatchGJT11 hr
Jul 3, 2:13 AM MDTRed Flag WarningGJT43 hr
Jul 3, 4:56 PM MDTSpecial Weather StatementGJT34 min
Jul 5, 2:35 AM MDTFire Weather WatchGJT13 hr
Jul 5, 3:17 PM MDTFire Weather WatchGJT23 hr
Jul 5, 3:17 PM MDTRed Flag WarningGJT31 hr
Jul 6, 2:29 PM MDTRed Flag WarningGJT31 hr
Jul 7, 4:00 AM MDTFire Weather WatchGJT10 hr
Jul 7, 2:07 PM MDTRed Flag WarningGJT31 hr
Jul 19, 3:24 PM MDTSpecial Weather StatementGJT36 min
Jul 19, 4:26 PM MDTSpecial Weather StatementGJT34 min
Jul 20, 2:40 PM MDTSpecial Weather StatementGJT35 min
Jul 31, 4:44 PM MDTSpecial Weather StatementGJT31 min
Aug 1, 12:13 PM MDTFlash Flood WatchGJT7 hr
Aug 1, 5:19 PM MDTAreal Flood AdvisoryGJT36 min
Aug 1, 5:34 PM MDTSpecial Weather StatementGJT11 min
Aug 1, 5:55 PM MDTFlash Flood WarningGJT74 min
Aug 1, 6:08 PM MDTSpecial Weather StatementGJT22 min
Aug 1, 6:15 PM MDTAreal Flood AdvisoryGJT67 min
Aug 2, 9:58 PM MDTFlash Flood Warning Considerable damage threatGJT2 hr
Aug 16, 4:40 PM MDTFlash Flood WatchGJT3 hr
Aug 16, 6:23 PM MDTAreal Flood AdvisoryGJT112 min
Aug 18, 3:08 PM MDTFlash Flood WatchGJT7 hr
Aug 23, 6:53 PM MDTFlash Flood WatchGJT2 hr
Aug 24, 4:12 PM MDTFlash Flood WatchGJT2 hr
Aug 24, 5:09 PM MDTSpecial Weather StatementGJT36 min
Aug 24, 5:41 PM MDTAreal Flood AdvisoryGJT3 hr
Aug 24, 5:53 PM MDTSpecial Weather StatementGJT37 min
Aug 25, 11:44 AM MDTFlood WatchGJT8 hr
Aug 27, 12:10 PM MDTFlash Flood WatchGJT7 hr
Sep 19, 2:34 PM MDTFlash Flood WatchGJT2 hr
Oct 1, 3:53 PM MDTFreeze WatchGJT22 hr
Oct 3, 2:55 PM MDTFreeze WatchGJT24 hr
Oct 10, 2:06 PM MDTWinter Weather AdvisoryGJT64 hr
Oct 11, 2:19 PM MDTFreeze WatchGJT12 hr
Oct 12, 2:07 AM MDTFreeze WarningGJT31 hr
Oct 13, 6:49 AM MDTFreeze WatchGJT7 hr
Oct 13, 1:33 PM MDTFreeze WarningGJT19 hr
Oct 26, 2:37 PM MDTWinter Storm WatchGJT11 hr
Oct 27, 2:00 AM MDTWinter Storm WarningGJT58 hr
Nov 22, 2:39 AM MSTWinter Weather AdvisoryGJT3 days
Nov 29, 2:28 PM MSTWinter Weather AdvisoryGJT4 days
Dec 1, 2:41 AM MSTWinter Storm WarningGJT3 days
Dec 7, 2:21 AM MSTWinter Weather AdvisoryGJT51 hr
Dec 21, 2:38 PM MSTWinter Weather AdvisoryGJT68 hr
Dec 22, 8:55 AM MSTDense Fog AdvisoryGJT2 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 archive20222024

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.