August 30 case
Description
- Clear skies transitioning to shallow cumulus to deep convection
- G1 sampled twice, from 0835 to 1326 and from 1232 to 1332 (?) LT
Central Facility sounding
Early morning
- CAPE: 425.0 J/kg, CIN: -119.0 J/kg, LCL: 978.03 hPa, LFC: 770.39 hPa
- Stable layer in above 900 hPa up to 800 hPa level.
- Moist boundary layer & lower troposphere
- calm winds in the lower levels
Around noon
- CAPE: 2781.2 J/kg, CIN: 0.0 J/kg, LCL: 881.48 hPa, LFC: 875.09 hPa
- Surface has warmed by ~ 10 °C, creating large CAPE and removing all CIN
- Still calm winds in the lowest 100 hPa
CTP-HIlow diagram
- ERA5 suggests strong land-atmosphere coupling that may lead to precipitating convection. This is because the temperature profile is already unstable in the early morning, along with sufficiently moist low-level atmosphere. It is not too moist, therefore moist static energy input from the surface is still important to raise the near-surface air parcel up to reach LFC with sufficient moist static energy (buoyancy).
MODIS Terra image and G1 flight routes
GOES visible reflectance snap shots from late morning to afternoon
Outer domain
Inner (LES) domain
GOES vs WRF timeseries comparison from late morning to afternoon
Inner-domain average of short-wave reflectance
Comparing WRF (ratio of SWUPT/SWDNT) and GOES (post-processed to 5-km grid over SGP)
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Fraction of non-missing data across the inner domain
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Inner-domain average SW reflectance
Inner-domain average Liquid Water Path
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Fraction of non-missing data across the inner domain
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Inner-domain average LWP
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Inner-domain average cloud fraction (fraction of grid columns with LWP > 1.0 g/m2)
