Friday 17 March 2017

Weather forecast for Kuala Lumpur produced at 7:00 PM Friday March 17

Kuala Lumpur 7 day weather forecast produced at 7:00 PM Friday March 17:
Explanatory notes:

















Figure 1.Key feature identified on ECMWF model simulation of surface winds for 06Z(2 PM Malaysian time) today based on the 00Z run today.Background image from Windytv,key features and drawing by me.Dashed line represents troughs while arrows point the wind direction and by no means indicate wind speed.H represents high pressure while L,low pressure with mean sea level pressure in hPa displayed.



Figure 2.Sea breeze showers and thunderstorms at around 0900 UTC(5 PM Malaysian time) on high resolution satellite image over Peninsular Malaysia.Satellite image courtesy of Japanese Meteorological Agency,key feature and drawing by me.


Figure 3.Key features identified on true colour RGB satellite image at around 08:00 UTC(4 PM Malaysian time today.Satellite image courtesy of Japanese Meteorological Agency,key feature and drawing by me.

Throughout the forecast the forecast period typical wet season conditions as the region lies within the doldrums with a highly moist and unstable atmosphere leading to high chances of showers and thunderstorms with light easterly low level winds from Saturday to Monday as subtropical high pressure over the northwest Pacific strengthens and expands,then light northwesterly low level winds during the middle of next week.

A weak equatorial Rossby wave lies to the east of Borneo and associated with it is two twin tropical lows,one north of Papua New Guinea and one in the Arafura sea.These tropical lows need watching with possible strengthening in the next few days,still plenty of uncertainty.

Nevertheless during early/middle next week the monsoon trough in the southern hemisphere is expected to strengthen reducing rain chances over the forecast area,albeit only slightly by strengthening the cross equatorial flow transporting moisture away to the southern hemisphere with light northwesterly low level winds expected over the forecast area during this period.

Note that from this forecast onwards minimum temperature forecast is for the morning minimum only.Previously could fall throughout the 24 hour day for example with showers and thunderstorms.Under the new rue the miniumum temperature forecast for Thursday March 16 would have been 27 Degrees Celsius.

The precis(summary) forecasts 
and "chance of any rain forecasts" are for Kuala Lumpur City Center 
while the detailed description underneath the precis forecasts is for 
the forecast area of Greater Kuala Lumpur area including the Klang 
Valley but the chance of rain forecasts in the detailed description 
underneath the precis forecasts is the average for the forecast area 
unless otherwise stated.


The weather forecasts are produced by me and not by any government agency.Use at your own risk.



The rest of today Friday March 17:

Precis forecast:Possible showers and thunderstorms.
Mostly cloudy with a medium(50%) chance of showers and thunderstorms between afternoon and early night.Light winds.
chance of any rain:50%


Saturday March 18:


Precis forecast:Showers and thunderstorms.
Partly cloudy with a  a very high(95%) chance of showers and thunderstorms most likely between afternoon and early night.Light winds with a westerly sea breeze at 10-20 km/h in the afternoon/evening.
24-33 Degrees Celsius
Chance of any rain:95%



Sunday March 19:



Precis forecast:Showers and thunderstorms.
Partly cloudy with a very high(95%) chance of showers and thunderstorms most likely between afternoon and early night.Light winds with a west to southwesterly sea breeze at 10-20 km/h in the afternoon/evening.
24-33 Degrees Celsius
Chance of any rain:95%



Monday March 20:

Precis forecast:Afternoon/evening showers and thunderstorms.
Partly cloudy with a slight(30%) chance of showers and thunderstorms over coastal areas during the early hours and morning,slight(20%) chance elsewhere A very high(90%) chance of showers and thunderstorms between afternoon and early night.Light winds with a westerly sea breeze at 10-20 km/h in the afternoon/evening.
24-33 Degrees Celsius
Chance of any rain:90%



Tuesday March 21:

Precis forecast:Afternoon/evening showers and thunderstorms.
Partly cloudy with a slight(30%) chance of showers and thunderstorms over coastal areas during the early hours and morning,slight(20%) chance elsewhere A high(80%) chance of showers and thunderstorms between afternoon and early night.Light winds becoming west to northwesterly at 10-20 km/h in the afternoon/evening in the afternoon/evening then becoming light again.
24-33 Degrees Celsius
Chance of any rain:80%




Wednesday March 22:

Precis forecast:Afternoon/evening showers and thunderstorms.
Partly cloudy with a slight(30%) chance of showers and thunderstorms over coastal areas during the early hours and morning,slight(20%) chance elsewhere A high(70%) chance of showers and thunderstorms between afternoon and early night.Light winds becoming west to northwesterly at 10-20 km/h in the afternoon/evening in the afternoon/evening then becoming light again.
25-33 Degrees Celsius
Chance of any rain:70%


Thursday March 23:

Precis forecast:Afternoon/evening showers and thunderstorms.
Partly cloudy with a high(70%) chance of showers and thunderstorms between afternoon and early night.Light winds with a westerly sea breeze at 10-20 km/h in the afternoon/evening.
25-33 Degrees Celsius
Chance of any rain:70%




Friday March 24:


Precis forecast:Afternoon/evening showers and thunderstorms.

Partly cloudy with a very high(90%) chance of showers and thunderstorms between afternoon and early night.Light winds with a westerly sea breeze at 10-20 km/h in the afternoon/evening.
25-33 Degrees Celsius
Chance of any rain:90%



Forecast produced at 7:00 PM Friday March 17.Weather icons courtesy of the US National Weather Service.