METAR remarks

[Squawk7777]

It is almost embarrassing really... but I am not able to decode the following remarks:

KSKF 160355Z 33002KT 7SM SCT035 BKN100 21/21 A2998 RMK WND DATA ESTMD SLP146 8/570 9/240

What does 8/570 and 9/240 mean?

KHDO 160351Z AUTO 00000KT 6SM BR SCT100 18/18 A3000 RMK AO2 SLP146 T01830183 PNO $

What does PNO mean?

Thanks

7 7 7 7

[Flap operator]

Cut and pasted information for speed:
Best guess for PNO is "something" NOT OBSERVED

RMK SLP013 T01760158. Selected stations will contain SLP for Sea Level Pressure reported as the last three digits in hectoPascals (milibars) to the nearest tenth (e.g., 1001.3 is reported as SLP013).


RMK SLP013 T01760158. Also, at selected stations, the 9 character code (T01760158) breaks down the temperature and dew point to the nearest 1/10th of a degree Celsius. The "T" stands for temperature and the "0" means positive temperature. A "1" in place of the "0" stands for negative temperature. At selected stations, other temperature codes, such as10142, 20012, or 401120084, may appear to document temperatures not related to aviation.

[zerozero]

7777--

PNO means the Precipitation Detector is not operating.

Others:

PWINO: wind
FZRANO: freezing rain
TSNO: thunderstorm
RVRNO: RVR
VISNO: visibility

The $ means the ASOS needs maintenance.

I have no idea about 8/570 and 9/240 but those numbers are definitely a different group than the temp/dew point breakdown referred to in the previous post.

I'm sure you'll get another response soon. Good luck.

[Techman]

The 8/xxx is synoptic cloud types.

From the Federal Meteorological Handbook .

Cloud Types (8/ClCmCh). At designated stations, the group 8/ClCmCh shall be reported and coded in 3-and 6-hourly reports when clouds are observed. The predominant low cloud (Cl), middle cloud (Cm) and high cloud (Ch), shall be identified in accordance with WMO International Cloud Atlas Volumes I and II, or the WMO Abridged International Cloud Atlas or agency observing aids for cloud classification.
A 0 shall be coded for low, middle or high cloud type if cloud if present in that classification.
A solidus "/" shall be coded for layers above an overcast. If no clouds are observed due to clear skies, the cloud type group shall not be coded. For example, a report of "8/6//" would indicate an overcast layer of stratus clouds; a report of "8/903" would indicate cumolonimbus type low clouds, no middle clouds, and dense cirrus high clouds