The
cloud amount is expected to increase gradually Saturday and there is a chance of scattered light rain in some areas, the Qatar Met department tweeted on Thursday.
Because time averaging is not very accurate and varies depending on the upper-level winds,
cloud amount should be regarded as one of the most vulnerable elements to error.
On Tuesday,
cloud amount deceases with a chance of rain over some areas especially eastward and northward.
Therefore, histograms built using "qc_ReflectivityClutterFlag = 1 and 2" may overestimate
cloud amount because clutter may be identified as cloud, whereas those based on "qc_ReflectivityClutterFlag = 1" may underestimate
cloud amount because some hydrometeors potentially contaminated by clutter were not incorporated into the histograms.
Total
cloud amount and single-layer cloud over the Tibetan Plateau in the day are slightly higher than at night, whereas other regions exhibit little difference between day and night.
The
cloud amount willincrease occasionally over scattered areas with a chance ofthundery rainfall at times.
These include parameterization of turbulence, cumulus convection, microphysical processes, radiative transfer, and the resulting
cloud amount (including the vertical overlap between different grid levels), as well as subgrid-scale transport of aerosol and chemical species.
"The
cloud amount will increase over the north and the sea will be rough to very rough at times in the Arabian Gulf and moderate to rough in Oman Sea, the UAE forecasters said.
Monthly availability of direct sunshine depends most substantially on the
cloud amount with smaller contribution from the atmospheric transparency variations.
IMD has recently developed technique for five-day district-wise quantitative forecast of rainfall, temperature, wind,
cloud amount and humidity.
The average
cloud amount for Yiwu is 52% compared to 44% for Hami and 49% for Jiuquan.