Hot, humid weather returning to the Hagerstown area this week

June 27, 2012|By DON AINES |

HAGERSTOWN — After a few days of pleasant spring-like weather, summer is expected to return with a vengeance Thursday in the first of a string of hot and humid days in which temperatures are expected to climb into the 90s.

Temperatures in Hagerstown are expected to hit 92 degrees today, followed by 97 on Friday, and highs of 95 on both Saturday and Sunday, said Calvin Meadows, a meteorological technician with the National Weather Service in Sterling, Va.

There will be a chance of thunderstorms in the afternoons and evenings on Friday, Saturday and Sunday, but Meadows said it is too early to say whether heat advisories will be issued for the immediate area.

“There may possibly be heat indices exceeding 105 Friday through Sunday,” but westerly winds could keep the heat index under that threshold, he said.

The heat index is a combination of temperature and relative humidity used to determine how hot it feels.

HM TV 6 meteorologist Brittany Beggs said heat indexes are possible up to 110.

Beggs said an excessive heat watch is in effect for the southern counties in Maryland Friday through Sunday night. The heat watch could extend north into Washington County, she said.

If the temperature prediction holds, there will not be any new record highs during the heat wave, according to local weather observer Greg Keefer’s website,

The record for June 28 is 97 degrees set in 1966, while the record for June 29 dates back to 1934 when the mercury hit 100, the website said.

The average high temperature in late June is about 86 degrees, according to the website.

Any showers and thunderstorms would not be related to a frontal system, Meadows said.

“What’s happening is afternoon and evening heating ... (is) destabilizing the atmosphere enough that you get scattered thunderstorms,” he said.

The beginning of next week will also see temperatures in the low 90s with the chance of precipitation, the weather service said.

The Herald-Mail Articles