Explanatory notes:
Scroll down below this section for forecast.
Figure 3.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image at 12 UTC(8 PM local time yesterday).Image courtesy of the Australian Bureau of Meteorology(BOM).
The west coast trough moved offshore on Wednesday night.
Hot conditions on Thursday with the long spell without 35+Degree days coming to an end with the west coast trough deepening down the west coast with warm air advection.But there will be significant differences in afternoon temperatures between coastal and inland coastal plain areas as there will be a sea breeze with the west coast trough moving inland.
The long spell without 35+ Degree days is the longest on record for January and February for the Mount Lawley site by a significant margin as the BOM had already tweeted that 23 days is a record and this would be 31 days!
Some high clouds moving in from the west from Thursday afternoon in a subtropical jet stream.
The west coast trough moves inland on Friday morning with early sea breezes resulting in cooler maximum temperatures on Friday,marine layer advects inland.
Middle to high level clouds move in from late afternoon ahead of an upper/middle level disturbance/trough,likely bringing virga but precipitation on the ground is unlikely with dry low level air.
Marine layer clouds likely early on Saturday with the very slight chance of drizzle.
The west coast trough remains inland during the weekend resulting in mild conditions.
The synoptic conditions next week depends on a tropical weather system expected to lie over the northern part of the State.Large uncertainty with wide variation between ensemble members.
The long spell with no 40+ Degree Days continues with the last 40+ Degree Day being Australia Day last year!With no 40+ Degree day within the forecast period,the next 40+ Degree Day will be at least the latest during summer as the 2005-2006 summer.
Thursday February 15:
City:
19-37 Degrees Celsius
Hot,some PM high clouds(mostly sunny).
Chance of any rain:0%
Rainfall amount:0 mm.
Perth metropolitan area:
Hot,some high clouds(mostly sunny) moving in from the west from afternoon.Winds south-southeasterly at 5-15 km/h becoming easterly at 20-30 km/h becoming south-southwesterly at 15-25 km/h from afternoon becoming south-southeasterly at 10-20 km/h at night.Maximum temperatures range from around 39 Degrees Celsius over inland coastal plain to around 32 Degrees Celsius over coastal areas,around 37 Degrees Celsius about the city centre.
Friday February 16:
City:
23-34 Degrees Celsius
Clouds increasing.
Chance of any rain:10%
Rainfall amount:0 mm.
Perth metropolitan area:
Sunny morning becoming partly to mostly cloudy from afternoon.Winds easterly at 15-25 km/h becoming light in the morning becoming west-southwesterly at 15-25 km/h from around the middle of the day becoming light at night.
Perth metropolitan area:
Saturday February 17:
City:
19-29 Degrees Celsius
Clouds clearing.
Chance of any rain:10%
Rainfall amount:0 mm.
Perth metropolitan area:
Partly to mostly cloudy becoming sunny by late morning.The very slight chance of drizzle in the early hours and morning.Light winds becoming southwesterly at 15-25 km/h becoming light at night.
Perth metropolitan area:
Sunday February 18:
City:
19-31 Degrees Celsius
Sunny.
Chance of any rain:0%
Rainfall amount:0 mm.
Perth metropolitan area:
Sunny.Light winds becoming west-southwesterly at 15-25 km/h becoming south-southwesterly at 10-20 km/h night.
Perth metropolitan area:
Monday February 19:
City:
18-30 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Rainfall amount:0 mm.
Perth metropolitan area:
Mostly sunny.Winds south-southwesterly at 15-25 km/h increasing to 20-35 km/h from around the middle of the day becoming southeasterly at 15-25 km/h later at night.
Perth metropolitan area:
Tuesday February 20:
City:
19-32 Degrees Celsius
Mostly sunny.
Chance of any rain:0%
Rainfall amount:0 mm.
Perth metropolitan area:
Mostly sunny.Winds south to southeasterly at 15-25 km/h.
Perth metropolitan area:
Wednesday February 21:
City:
20-32 Degrees Celsius
Partly cloudy.
Chance of any rain:5%
Rainfall amount:0 mm.
Perth metropolitan area:
Partly cloudy.Winds southeasterly at 15-25 km/h,tending south-southwesterly at 20-30 km/h in the afternoon and evening.
Forecast for today produced at 12:00 AM,forecast for the rest of the days produced at 7:00 PM Tuesday February 13.Weather icons courtesy of the US National Weather Service.
