An area of low pressure that produced a little rain and also dropped temperatures resulted in areas of dense fog which formed in a few valleys within western Colorado.
Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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The episode as NWS GJT wrote it up.
An area of low pressure that produced a little rain and also dropped temperatures resulted in areas of dense fog which formed in a few valleys within western Colorado.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Junction, CO wrote its last area forecast discussion before the first event at Sep 27, 4:29 PM MST, 12 hours 31 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
3 dense fog. Local standard time, as filed.
Dense fog occurred along Highway 50 from the Mesa County line to the west edge of the town of Delta. Visibility was down to no more than 50 feet in many areas.
Webcams and eyewitness reports along Hwy 550 near Ridgway and south of town indicated dense fog with visibilities estimated to be a quarter mile or less.
Dense fog occurred along Highway 50 several miles within Mesa County to the Delta County line. Visibility was generally around 200 feet.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2017Every state in 2017This day in weather historyWarnings in Colorado, September 2017
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 717969, 717970, 723863.