Bermuda Weather Service Forecast Discussion
For Monday, September 14, 2026
21:00 UTC
FORECASTER - Lawrence Doughty
NOWCAST: (This evening and tonight)
High pressure maintained mostly settled conditions during the day,
although weak surface troughing did send a few showers over the island
during the early part of the afternoon. Isolated showers linger within
the area into Tuesday as a slow-moving and weak frontal boundary
nudges towards us. Sympathetic ridging ahead of the front should
keep mostly settled conditions over us tonight and into the morning
with partly cloudy skies expected to persist through most of the
night. Models show good overall agreement, with the front stalling
to the near west into Tuesday with marginal QPFs. Light S`ly winds
gradually veer SSW`ly. Seas remain slight.
WATCHES, WARNINGS and ADVISORIES: None.
AVIATION: VFR conditions are expected to persist with the slight
chance of MVFR conditions due to isolated showers developing towards
the end of the period. Light S`ly winds gradually veer SW’ly through
the period. For more information visit: http://weather.bm/aviation/
SHORT TERM FORECAST: Tuesday through Wednesday
Upper troughing becomes `pinched` through the period, causing the
frontal boundary to stall to the near west of Bermuda, before retrogressing
further west as inverted troughing to the south helps push any organized
showers away from us. Therefore, cloudy spells are expected to increase
during Tuesday afternoon as the front weakens and stalls. Models
show good overall agreement with only a few mm`s of rainfall expected,
although this may be greater in some areas as conditional instability,
along with local heat effects within a light SSW-SW`ly wind indicate
the distinct chance of a heavier afternoon shower with the slight
chance of thunder to the NE of Bermuda. Surface ridging returns on
Wednesday after a possible early shower, allowing brighter conditions
and continuing above average temperatures. Surface ridging allows
light winds to gradually back to the SE throughout the period. Slight
seas build moderate, peaking on Wednesday morning before gradually
diminishing once again.
WATCHES, WARNINGS and ADVISORIES: Slight chance for a Thunderstorm
Advisory on Thursday afternoon/evening.
LONG TERM FORECAST: Thursday through Friday
Despite troughing to the east and cyclonic flow to the distant W,
overall upper ridging persists overhead, allowing surface ridging
to dominate throughout the period, maintaining light winds that steadily
back to the to the NE and eventually NNW into the weekend. Despite
this, the chance of a brief shower cannot be ruled out as weak surface
troughing becomes more organized towards the weekend. Overall, mostly
fine and dry weather is expected to persist with above average temperatures
continuing. Slight to moderate seas gradually diminish towards slight.
WATCHES, WARNINGS and ADVISORIES: None currently anticipated.
TROPICAL UPDATE
BWS, alongside the NHC, continue to monitor the development of a
disturbance in the Central Sub-Tropical Atlantic. At this time, no
significant impacts from this system are currently forecast. Please
remain advised of the latest NHC weather outlook, available at https://www.nhc.noaa.gov/gtwo.php?basin=atlc&basin=atlc&fdays=7