The heat wave that affected the region since last Sunday reached its peak today for most, with widespread highs in the mid 90s to low 100s away from the coast, where a sea breeze and isolated storms kept temperatures cooler. Along with humidity, heat index values got up to the mid 100s to even low 110s. A weak cold front will produce some storms tomorrow as it comes through, ending the heat wave, with temperatures returning into the 80s with some rain chances next week.
Thursday, July 18 Observations:
Some of the hottest temperatures of the heat wave took place on Thursday as a westerly flow set up along with mostly-partly sunny skies and warmer temperatures aloft, reaching 20-22C at 850mb. High temperatures reached the low to mid 90s in southern CT and the mid to upper 90s for the rest of the area, with parts of NE NJ and NYC reaching the low 100s. Along with humid conditions with dew points in the mid 60s to low 70s, heat index values reached the low-mid 100s. Newark, LaGuardia and JFK both reached the low 100s, with the hottest temperature recorded in Newark with 101 degrees.
Record highs on Thursday, July 18, 2013:
JFK Airport, NY
100 degrees (previous record: 96 degrees – 2012)