Category: "Film frost"

Film frost grains and radiative cooling of the ground

December 10th, 2017
December 8th brought the first frost to the Seattle area. This doesn't mean that this is the first time this season that the ground reached 0 degrees C or lower. True, we had gotten snow in late November, though this by itself doesn't mean the ground… more »

Concentric Film Frost

October 25th, 2017
October 16, 2017, the first frost of the 2017-18 winter as far as I know. Frost in Eastern Washington anyway, those of us on the west side of the Cascade Mts have not gotten any yet. Marc Fairbanks, an avid nature observer from the mountains near Cle… more »

More frost patterns on black cars

January 7th, 2017
Black cars remain my favorite place to observe frost patterns. Here are a few I saw on one car today.   [image:46] The straight lines of frost are more common when it is drier. And it has been quite dry here due to the very low temperatures.  [image:50]… more »

Crystal-to-crystal “communication” through vapor and heat

January 5th, 2013
Two mornings ago, I saw this on the windshield of a parked car. The bulls-eye pattern wasn’t centered on any particular feature on the windshield, and there were similar, though less developed, patterns nearby. See them on the photo below. The dark… more »

Choppy waves

January 11th, 2012
I thought this hoar frost pattern looked like rough seas. I see choppy, cusp-like waves down there. Not having any pictures of rough seas, I hopped in our bathtub and kicked my legs around to make waves. Perhaps you can see a little resemblance.… more »

What We Sometimes Miss

March 8th, 2011
For the first few years in which I would excitedly go out on frosty mornings to photograph ice formations, I never paid any attention to frost on car bodies. Sometimes I would notice something on our car window, but that was basically it – I was… more »

More Tales of Mystery and Observation

December 1st, 2010
When I stepped out early Saturday morning, the air seemed relatively warm, particularly compared to the cold snap we had last week. Indeed, it was much warmer, and yet the parking lot in our apartment complex had a glaze that was much more dangerous… more »

The Window of Many Cacti

February 14th, 2010
It’s been two weeks since our last frost, and judging from my first dozen shots, it seemed like my photography skills dropped from mediocre to downright pathetic. But then I got a few good shots of frost on windows. The fact that I shoot windows on cars… more »

Ripples

February 5th, 2010
Ripples in still water When there is no pebble tossed Nor wind to blow - Grateful Dead “Ripple” I don’t know where to start on this one. For some time I’ve been seeing concentric circular patterns on car windshields and car bodies – bands of white… more »

Mystery of Whirlpool Hollows

February 3rd, 2010
I’ve seen this whirlpool pattern on two mornings on the same plastic side-mirrors of the same car. The hollow columnar crystals are oriented lengthwise along concentric circles, which strongly suggests that an underlying film froze with the same… more »