Bermuda Weather Service Forecast Discussion
For Tuesday, January 21, 2025
20:00 UTC
FORECASTER - Kimberley Zuill
NOWCAST: This Evening through Tonight
Plagued with low cloud hovering 400-800ft, patchy mist and spotty
drizzle, today remained gloomy as light to moderate NE winds gradually
veered to become SE by late afternoon. As the nearby front continues
to slowly lift out of our area while the cold front presses in from
the distant west, winds will veer to the south and strengthen towards
18-20 knots. Satellite imagery teases us with an edge of clearing
cloud about 50-70nm to our south, once winds begin to veer more southerly,
we may see lifting of the cloud ceiling slightly, though as darkness
falls temperatures will as well and mostly cloudy skies will prevail
(the UK modeled cloud forecasts indicate that low cloud will linger
for the remainder of the night). OPC pegs seas just beyond our reef
at 6-8ft , which aligns with global wave models.
WARNINGS: A Small Craft Warning is valid for Tonight when winds
increase above 20 knots.
AVIATION: MVFR/IFR conditions due to low ceilings and -RA BR improve
to become VFR later overnight. RWY12 is active with winds 100-150
degrees at 12-15kts expected to veer 180-200 degrees and increase
15-18 knots. For more information visit: http://weather.bm/aviation/
SHORT TERM FORECAST: Wednesday through Thursday
Near zonal flow aloft briefly transitions to broad upper troughing
on Wednesday and stirs up cyclogenesis along the surface frontal
boundary just to our west, which perpetuates cloudy skies over our
local area then strengthens SSW winds towards evening as the front
nears. Strong winds may become gusty in and around showers, potentially
reaching gale force for a short time, before veering and easing NE’ly
moderate into Thursday. Completing a quick spin of the compass, winds
veer to become SW late Thurs night. Moderate to rough seas are expected
in the short term.
WARNINGS: A Small Craft Warning is in effect for Wednesday through
Thursday morning and may need extending. Slight chance of a thunderstorm
advisory for Wednesday.
LONG TERM FORECAST: Friday through Saturday
A shortwave trough steers through the nearly zonal flow and deepens
as it moves overhead. On the surface, a parade of weak surface lows
continues to be spun up to our distant southwest creating another
source of cloudy skies that thicken once in our region and lower
to dampen us with periods of rain that become scattered showers late
Friday night/early Saturday morning with the slight chance of isolated
thunder. Moderate to strong SW’ly winds are expected to ease for
a time before increasing once again with gusts towards gale force
possible during the frontal passage then winds veer northerly late
Friday night. Moderate to rough seas diminish slightly on Saturday.
WARNINGS: Small Craft Warning will be needed throughout the long
term and a thunderstorm advisory is possible for late Friday night/early
Saturday morning.