Expect the Highest Heat Indexes of the Summer Before a Cold Front Brings Dip in Temperatures, Chance of Rain

Meteorologists expect a cold front to sweep Dallas this week, but a possible thunderstorm won't provide much relief from Monday and Tuesday's triple-digit temperatures. High temperatures are expected to climb to 102 degrees Monday and 103 degrees Tuesday, according to KXAS-TV (NBC5) meteorologist Brian James. But following a 20-40% chance of scattered thunderstorms Tuesday night into Wednesday morning, Wednesday's high should reach only 95. "It's not a drastic drop, and we can certainly bounce back up from that," James said. "It's not going to cool us down a lot."The National Weather Service issued a heat advisory for Monday afternoon, when they expect heat index values in North Texas to hover between 105 and 110 degrees. The region will also be under an excessive heat watch Tuesday afternoon, when NWS meteorologist Monique Sellers warns the heat index could surpass 110.Even the moisture expected to reach Dallas this week could raise humidity levels enough to negate the lower temperatures, according to Sellers."Everyone's kind of used to a cold front in the spring and fall, with dry air behind the cold front," Sellers said. "Unfortunately, this is kind of normal."  Continue reading...