A low level trough should approach the islands overnight with little fanfare, as dry air accompanies the trough axis. However, some moisture could converge across our area Friday (afternoon into the night), as an inverted trough (associated with induced low in the Atlantic) pulls lower level moisture around the Atlantic High Pressure.
Models now indicate small chance (20%) for rainfall accumulations late Friday into Saturday, with subsident dry upper levels possibly negating shower chances.
The High Pressure System should begin establishing itself across with its center shifted to the Eastern Atlantic. Few scattered showers are possible across our area on the south-western edge of the High Pressure. Although dry mid levels are expected, a short wave trough in the upper levels may give little support with upper level moisture gradually increasing by Sunday afternoon.
Moderate to fresh (20-38km/h) east north-east trades should continue over the next few days.
Mean sea-level pressure should range 1014-1016mb overnight, slightly increasing (1016-19018mb) behind the trough axis on Friday and Saturday. Easterly sea swells are generally moderate peaking near 1.5m on the west and 2.0m on east, slight increase possible temporarily late Friday into Saturday. Dust concentrations of varying intensity continue to affect our islands occasionally reducing visibility.
Note: The National Hurricane Center issued advisories on newly formed Tropical Depression One-E, located more than 1000 miles west-South-west of the southern tip of the Baja California peninsula. This tropical depression is not expected to last more than a day.