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Old 9th Jan 2017, 22:16   #1 (permalink)
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Translate this simple METAR

Just browsing some MET data.

Can anyone help to decipher the /// part of the METAR below:
EETU 092150Z AUTO 22010KT 8000 BR OVC007/// M01/M03 Q1017 REFZUP RESG

I got the rest but my Google searches are not coming up with anything with the backslashes after the cloud description.

I know that a report from a fully automated AWS that does not include information from sensors for visibility, weather, or cloud will report ////, // or ////// respectively in lieu of these parameters. This one has 3x backslashes so just got curious.
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Old 10th Jan 2017, 06:49   #2 (permalink)
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Sky obscured.
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Old 10th Jan 2017, 12:29   #3 (permalink)
 
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I am from the dark ages, but "manual" observers would never have been allowed to report "sky obscured" with a vis of 8km and cloud base of 700ft.

Automatic weather stations are wonderful, but someone has had to ponder a hell of a lot about slashes and backslashes to accomodate every combination of possibilities nature can come up with.

Such is progress with automation - the tradeoff is you get irritating bureaucracy and complex forgettable fluff.

(Cynical Aged Fart.)

Last edited by EGQL1964; 10th Jan 2017 at 16:20.
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Old 10th Jan 2017, 14:16   #4 (permalink)
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From Annex 3:

Quote:
when the cloud type cannot be observed by the automatic observing system, the cloud type in each cloud group
should be replaced by ///
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Old 10th Jan 2017, 16:17   #5 (permalink)
 
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It can do cloud type automatically, perhaps?

Impressive if it can.

Cloud type when overcast in mist with 700ft base is easy for the human brain, though, has to be stratus. Someone should write a program to tweak.

"Recent unidentified freezing ppn" & "snow grains" seems most reasonable for the continental winter.
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Old 12th Jan 2017, 12:59   #6 (permalink)
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Thanks for the help.
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