Weather forecast for Perth effective as of 5:00 PM Saturday March 10

Weather forecast for Perth effective as of 5:00 PM Saturday March 10:

Explanatory notes:
Scroll down below this section for forecast. 

Figure 1.Surface synoptic chart at  06 UTC(2 PM local time today).Image courtesy of the Australian Bureau of Meteorology(BOM).

Figure 2.A severe weather warning for damaging winds has been issued by the Australian Bureau of Meteorology(BOM) effective tonight and early tomorrow.Please see http://www.bom.gov.au/products/IDW21037.shtml for the latest warning.

Figure 2.Key features identified on True Colour RGB satellite image at around 07:00 UTC(3 PM local time today).Satellite image courtesy of the Japanese Meteorological Agency(JMA).

Figure 3.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image at 06 UTC(2 PM local time today).Image courtesy of the Australian Bureau of Meteorology(BOM).

Figure 4:Surface synoptic prognosis.Image courtesy of the Australian Bureau of Meteorology(BOM).

A strong somewhat easterly pressure gradient lies over the region especially overnight tonight and early tomorrow with an unusually strong high pressure ridge to the south with maximum central Mean Sea Level Pressure(MSLP as high as 1040 hPa!

Wind gusts in excess of 90 km/h possible tonight and early tomorrow especially over the hills and foothills.

The Australian Bureau of Meteorology(BOM) has issued a severe weather warning for damaging winds effective tonight and early tomorrow.Please see the latest warning at http://www.bom.gov.au/products/IDW21037.shtml.

According to the BOM easterly winds of this strength occur once every 2-3 years.This eastery wind event could possibly be the strongest since the event on December 31 2015-January 1 2016 or even stronger.ECMWF model predicts winds in excess of 85 km/h at the top of the mixing layer.

As vertical mixing decreases past midnight,winds over the coastal plain possibly weaken but gusty winds will still likely penetrate at times,winds remain strong over the hills and foothills.

Some high clouds also overnight and tomorrow streaming in a subtropical jet stream aloft.

Some middle level clouds from Monday to Thursday with moist air aloft.

The west coast trough then moves inland with a cold front,low pressure system and thereafter cold air mass possibly affecting the region from Thursday bringing showers.

The rest of Saturday March 10:

City:

Some high clouds(mostly clear).Windy.

Chance of any rain:0%

Severe weather warning in effect

Perth metropolitan area:

Some high clouds(mostly clear).Winds east-southeasterly at 20-30 km/h increasing to easterly at 30-45 km/h at night,even stronger over the hills and foothills.Wind gusts in excess of 90 km/h possible at night especially over the hills and foothills.

Note:The Australian Bureau of Meteorology(BOM) has issued a severe weather warning for damaging winds effective tonight and early tomorrow.Please see the latest warning at http://www.bom.gov.au/products/IDW21037.shtml.

Sunday March 11:

City:

17-33 Degrees Celsius

Some high clouds(mostly sunny).Windy early.

Chance of any rain:0%

Amount:0 mm.

Severe weather warning in effect until morning
Perth metropolitan area:

Some high clouds(mostly sunny).Winds easterly at 25-40 km/h easing to east-southeasterly at 15-25 km/h in the afternoon increasing to easterly at 20-30 km/h at night.Wind gusts in excess of 90 km/h possible in the early hours and morning especially over the hills and foothills.
Note:The Australian Bureau of Meteorology(BOM) has issued a severe weather warning for damaging winds effective until morning.Please see the latest warning at http://www.bom.gov.au/products/IDW21037.shtml.

Monday March 12:

City:

19-34 Degrees Celsius

Mostly sunny.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Mostly sunny.Winds easterly at 20-30 km/h easing to 10-20 km/h in the afternoon becoming east-southeasterly at night.Wind gusts in excess of 70 km/h possible in the early hours and morning especially over the hills and foothills.

Tuesday March 13:

City:

23-35 Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy.Winds east-northeasterly at 15-25 km/h tending southerly at 15-25 km/h from afternoon becoming southeasterly at 5-15 km/h at night.

Wednesday March 14:

City:

24-34 Degrees Celsius

Partly cloudy.

Chance of any rain:10%

Amount:0 mm.

Perth metropolitan area:

Partly cloudy,some high clouds.Winds northeasterly at 15-25 km/h becoming westerly at 20-30 km/h from around the middle of the day becoming southwesterly at 10-20 km/h from afternoon becoming south-southwesterly at night.

Thursday March 15:

City:

19-26 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 1 mm.

Perth metropolitan area:

Partly cloudy.A slight(30%) chance of showers.Winds southwesterly at 20-30 km/h.

Friday March 16:

City:

15-24 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Partly cloudy.A slight(30%) chance of showers.Winds southwesterly at 15-25 km/h.

Saturday March 17:

City:

15-24 Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 0.4 mm.

Perth metropolitan area:

Partly cloudy.A slight(30%) chance of showers.Winds south-southwesterly at 20-30 km/h.

Forecast produced at 5:00 PM Saturday March 10.Weather icons courtesy of the US National Weather Service.