Wx is more unpredicatble these days
Ah! The old global warming - or is it the El Nino - or maybe all the space debris blocking out the sun causing global freezing. And all this money the Howard government is spending on ATIS, AWIS, AWC and RFC's, DWSO's, MWO's, MO's, AMU's with METAR, SPECI, TTF and TAF - not to mention wind shear warning service, CA/GRS and UNICOM, and don't forget Approved Observers, active weather reports, SIGMETS and the BoM's Volcanic Ash Advisory Centre -not to mention AIRMET and AERIS, VOLMET , WATIR (look that up in AIP),
With all that met info at hand, unpredictable weather should never catch you out..