For Those of You Who Asked What the Weather Outlook is for the Next Few Days
Sunday, July 4, 2021 at 2:14PM Issued: 1115 PDT Saturday July 3, 2021.
SYNOPSIS: (Today-tomorrow) Although a weak upper trough crossed the area last night, the only effect has been to help clear out some of the marine layer clouds that have plagued the Lower Mainland the last few days.
Radar imagery shows the remnants of the cloud band crossing the provincial divide with a few high level showers which apparently are not reaching the ground. Skies are sunny and temperatures are beginning to warm quite rapidly and likely climb a degree or two above Friday’s values—mid 20s to low 30s. A thermally induced trough will deepen over the BC interior today, centred over the Okanogan, and as the pressures fall,Coastal mainland river valleys should see increasing inflow winds. As the interior pressure rises again after dark, the winds will decrease. A few isolated showers form along the western edge of the thermal trough giving a chance of an isolated shower for eastern parts of the mainland zones. There is a risk of thunderstorms over the Coast Mountains as well. The forecast for Sunday looks remarkably the same and temperatures and winds will follow a similar pattern. Possibly the interior thermal trough deepens Sunday afternoon and backs up to lie along the east facing slopes of the Coast Mountains which brings a stronger inflow to the Coastal fire centre. Also, it is likely that increasing instability and moisture brings a higher chance of showers and thunderstorms to eastern sections of the mainland zones.
OUTLOOK: (Monday-Wednesday) Sunny warm weather continues through Monday and Tuesday but by late Tuesday current forecasts show a deeper offshore low diving southeast down the outer coast and setting up a moist unstable flow onto southern BC. This brings general cloud cover and a few showers and cooler temperatures for Wednesday along with a better chance of thunderstorm activity.
Jeannine