Tonight is expected to bring an unseasonable chill to the region, prompting weather experts to issue frost advisories and urge residents to protect sensitive plants and crops. But a surprising turn of events is looming - temperatures are set to skyrocket by Friday, promising a welcome respite from the chill. According to predictions, a powerful high pressure system is expected to move rapidly into the region, carrying with it a wave of unseasonably warm air that will shatter the cold spell. Frost blankets will be swapped for sunglasses as residents bask in the unexpected warmth. Weather experts say the dramatic turnaround is not unprecedented but is still unusual for this time of year. 'We could possibly see some record temperatures this Friday,' said Jane Smith, meteorologist at the national weather service. 'This high pressure system is going to move rapidly and pick up warmth as it goes. So by the time it gets to us on Friday, it should be carrying some really warm air with it.' In the meantime, residents will have to endure another chilly night, with temperatures falling as much as 10 degrees in some areas. Homeowners are advised to cover any sensitive plants, including blossoming flowers and small trees. However the temporary reprieve from warmer weather will be replaced by mid-morning Friday, as temperatures are expected to soar to sweltering levels. Residents are being warned to wait until Thursday to uncover their cars from frost protectors. Whether the frost will cause any lasting damage is too early to tell, but weather experts warn the sudden change in temperature could have some plants going into shock.