The El Reno tornado achieved a status that changed the way chasing is conducted. The widest tornado in history, this tornado exhibited behaviour rarely witnessed by chasers. It developed as a fairly large tornado and changed direction along its initial path, increased in speed and also doubled in size in about 30 seconds! Consequently, and unfortunately, it achieved a status of being the first known tornado where chasers were killed as a direct result of the tornado. More startling was that the chasers were very experienced - one veteran of the order of 30 years experience - Tim Samaras. It is quoted that had this tornado hit Oklahoma City just to its east, it would have caused destruction on biblical proportions!
An East Coast Low developed overnight off the Mid North Coast of NSW. Already significant rainfalls have occured with a flood watch for the Bellinger and Nambucca Rivers.
This morning the low is east of Coffs Harbour and expected to move N then NE. The shear profile later today supports a possible tornado mainly in the coastal area. The BoM warning reflects the threat:
Issued at 6:43 am EST on Friday 24 May 2013.
A low pressure centre off the Mid North Coast is deepening. Rain, wind and surf will increase along the Mid North Coast and Northern Rivers during Friday, with destructive wind gusts possible from intense periods of rain along the coastal fringe.
Very heavy surf which may lead to localised damage and coastal erosion is forecast for the Mid North Coast forecast district. Beach conditions in these areas could be dangerous and people should stay well away from the surf and surf exposed areas.
The State Emergency Service advises that people should:
Move vehicles under cover or away from trees.
Secure or put away loose items around your house, yard and balcony.
Keep clear of fallen power lines.
Don't drive, ride or walk through flood water.
Keep clear of creeks and storm drains.
If you are trapped by flash flooding, seek refuge in the highest available place and ring 000 if you need rescue.
For emergency help in floods and storms, ring your local SES Unit on 132 500.