Case: 20 November 2018

Summary

Multi-day open cell event with precipitating cumulus

Description

A multi-day open cell event (November 20-21st) with scattered cumulus and precipitating cumulus on the first day, and more frequent clouds throughout the following day. Winds were light and from the north on both days. The melting level was observed at approximately 2.0 km AGL and lowering to 1.5 km by the end of day on 20 November. Most precipitating cumulus cloud tops were observed to exceed 3.0-3.5 km AGL. Scattered high cloud decks were observed on both days, however these clouds remain outside the primary Azores modeling region.

Available assets

Standard ARM profiling assets, SEVIRI. RLPROF-FEX

Critical period: 06:00-15:00

Deeper precipitating cumulus over the ENA main site

True color MODIS AQUA — Figure 38 True color afternoon MODIS AQUA image with overlaid LES domains. The image area corresponds to the 5° region sampled for the larger forcing option. The yellow and orange boxes correspond to the sizes of the 25 km and 102 km LES domains, respectively.