The cool April weather we are experiencing will quickly be a thing of the past by the middle and latter portions of this week. High pressure is building into the region today and will be the dominant weather player across the East through Friday. It will be slow moving thanks to low pressure that will develop in the Atlantic off of the Carolina coastline. This low will move slowly northeast as it is cut off from the main weather patterns aloft but it will stay far enough east to avoid us with bad weather. The low will, however, nudge the high pressure center just to our south. The placement of high pressure over the Carolinas at any time of the year usually results in warmer than normal weather for Philadelphia and this is one such occasion where 2008's first 80 degree reading may be within reach on Friday as warm air is transported on southwest winds aloft from the South.

Even if we don't hit 80 on Friday, the season's second 70 degree wave of 2008 will bring warm weather to the region Thursday through Saturday. A disturbance will move east and undercut the high pressure, bringing us a chance of showers and storms Saturday night-early Monday.