Mr Blair warned people across the region to take care when going out in the snow.
He said: "Remember to wear the right clothes and shoes. Also be sure to check on your elderly and vulnerable neighbours, making sure they are warm and have enough food."
Last night, Liverpool Labour councillor Rose Bailey demanded an investigation into whether Liverpool's roads had been gritted.
She said she had been inundated by calls from angry residents.
Cllr Bailey added: "I have had calls from residents who cannot even leave their houses, because it is far too unsafe. On Everton Brow, police officers were clearing the snow using riot shields.
"It does not look like the streets have been gritted at all, salt turns snow to mush and it is not like that anywhere. After speaking to friends and colleagues in Sefton and Knowsley, the conditions are much better.
"There has been plenty of warning about the weather. The council have known about this in plenty of time. I will be calling for an investigation."
But a spokesman for the council insisted roads had been gritted throughout the night. He said: "Initially, we targeted the main routes. Gritters first went out at about 6.30pm last night (Saturday) and then again in the early hours and later in the morning.
"In the morning, street cleaners were out gritting the pavements in the city centre for pedestrians in the area."
At Liverpool John Lennon Airport, 15 flights were cancelled throughout the morning.
A JLA spokesman said: "We had to cancel the first wave of flights because of the amount of snow on the runway. We tried clearing it up, but no sooner had we got one section cleared, we had to go back and do it again as the snow was coming thick and fast.
"Early in the morning, the airport was very busy with people waiting to see if they could get a flight. The lunchtime wave was back as scheduled."
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