Humidity and temperatures expected to be slightly lower Sunday

July 23, 2011

Temperatures were slightly lower Saturday, but Washington County still was feeling the effects of a heat wave that has engulfed much of the Northeast.

Saturday's high temperature in Hagerstown was 97 degrees, according to, a website maintained by Hagerstown weather observer Greg Keefer.

The temperature was five degrees lower than Friday's high of 102 degrees. That temperature tied the record high for July 22, which was set in 1926, according to Keefer's website.

The heat index hit 113 degrees at 2:18 p.m. Saturday, according to Keefer's website. The heat index reached a blistering 124 degrees around 2 p.m. Friday.

Sunday's high temperature in Hagerstown is expected to be 96 or 97 degrees, according to Carrie Suffern, a meteorologist with the National Weather Service in Sterling, Va. Monday's high temperature is expected to be around 90, Suffern said.

With the humidity also expected to be lower, there is not a heat advisory in effect today in Washington County, Suffern said. There is a heat advisory in effect for Frederick County today from 10 a.m. to 7 p.m., she said.

Temperatures are expected to rise back into the mid-90s by the end of the week, Suffern said.

Suffern said the best chance for thunderstorms hitting Washington County will be on Monday, with storms possible beginning in the afternoon and continuing into the evening.

Suffern said temperatures were set or tied at the region's major airports Saturday.

The high hit a record-setting 102 degrees at Ronald Reagan Washington National Airport, Suffern said. Records were tied at Baltimore/Washington International Thurgood Marshall Airport (102 degrees) and Dulles International Airport (99 degrees), she said.

— Tim Shea

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