Bermuda High, a ridge of high pressure that becomes anchored in the Atlantic Ocean near Bermuda and usually lingers in the region for most of the summer.
That area of high pressure can also affect the track of hurricanes if and when they develop in the ocean.Temperatures of 20 to 30 degrees above average are expected across the region, with many areas seeing highs in the 90s from the mid-Atlantic and Ohio Valley into the Northeast and New England.Most of the extreme heat will be confined to the Ohio Valley and mid-Atlantic.The good news for the South: Some relief is on the way in the form of a cold front that will help to bring temperatures closer to average on Sunday.
However, that's not the story for the East, as nearly 100 more record highs are forecast to fall as the heat begins to sizzle in the region.The National Weather Service has issued the Northeast's first Heat Advisories of the season from parts of New England to the northern mid-Atlantic, where the heat index is expected to climb into the upper 90s to near 100 degrees on Saturday and/or Sunday.Heat Advisories are in effect for parts of the Northeast. (FOX Weather) To give an idea of how rare it is to have Heat Advisories issued in May in the Northeast, the only NWS office in the region to issue this alert in May since 2006 is Philadelphia/Mt.