While it’s no surprise that an intense, broad hot airmass is affecting most of WA, this morning was exceptionally hot for residents of western Gascoyne and Pilbara. Cloud cover and a low-to-severe heatwave contributed to maintaining the heat over the region, resulting in the highest minimum temperatures since 1945 in Carnarvon (27.3 degrees). Port Hedland recorded 28.1 degrees, marking the hottest morning since 1949. 

Images: Daily minimum temperature on Saturday, February 19, according to the ECMWF. 

The intense, broad hot airmass will strengthen, bringing an extreme heatwave primarily to the Pilbara and Kimberley tomorrow (Sunday 18th), followed by the Central and Lower West and Central Wheat Belt on Monday 19th. Heat levels will rise across the state, and Ben Domensino has written two informative stories about it this week, which you can read here and here. 

Image: Heatwave severity on Sunday, February 18, according to the Bureau of Meteorology.  

Relief from this persistent heat will arrive on Wednesday when a strong cold front pushes the warm air mass eastward. The cool change will be particularly significant in the southwest, with a temperature drop of 15 degrees or more between Monday 19th and Wednesday 21st. In WA’s western regions, the heat will gradually subside by the end of the week as the hot trough weakens. 

Image: Daily maximum temperature on Wednesday, February 21, according to the ECMWF (top). 

Until then, remember to stay hydrated, avoid strenuous outdoor activities during peak heat hours, and opt for light, loose-fitting clothing. And, of course, keep an eye on the weather forecast via the Weatherzone website.