Triple-Digit Heat Smashes Washington DC, Mid Atlantic Temperature Records

See here for more Washington DC weather records.

See here for June 27 update.

June 24 Update: Here are the preliminary temperature record counts for the entire U.S. on June 24:

Warmest max temperature 36
Coldest min temperature  1 

1 AM Update: It's not official, but the new record high minimum temperature of 78° appears to have held.

Evening Update: More record reports from major reporting locations (previous records in parentheses):

Richmond            102 (100, 1948)
Wallops Island VA    99 (92, 2002/1997)
New Bern NC          97 (96, 1960)
Atlantic City        99 (96, 1966)
Georgetown DE        97 (96, 1988)  

Note that the Atlantic City record was broken by 3° in an observation history which extends back to 1874.

It's still 90° in Washington at 7 pm.

Late PM Update: The preliminary highs reported by the National Weather Service:

Washington National 100 @ 2:32 PM
Washington Dulles    97 @ 1:48 PM
Baltimore BWI       100 @ 1:54 PM 

All of them are new records by 2° each. The previous Baltimore record had occurred 3 times in the past: 1966, 1908, 1894.

The Washington morning low of 78°, if it holds through midnight (1 am EDT), would also be a new record high minimum, beating the old record of 77° which has stood since 1874. Given the lack of rainfall so far, that seems like a distinct possibility. The 1874 record is the oldest of only 3 remaining 19th century daily high minimum records for June. A daily high minimum record (76°) has already been set this month on the 21st.

Here are some other high temperature records reported by the National Weather Service so far today (previous records in parentheses):

Raleigh            99 (tie, 1996)
Elizabeth City NC  99 (97, 1981)
Wilmington NC      98 (97, 1950)
Islip NY           93 (91, 2003)
Kennedy Airport NY 97 (95, 1966)
LaGuardia Airpt NY 95 (93, 2003) 

PM Update: 3 pm temperatures:

Washington National  98
Washington Dulles    95
Baltimore BWI       100 

Original post:
The official Washington DC temperature of 99° at 2 pm today has already broken the heat record for June 24 set in 1894 as readings continue to climb. That record was one of only 3 remaining June high temperature records from the 19th century, including the all-time June daily high of 102° on June 9, 1874. (By contrast, 5 daily low temperature records remain from the 19th century. Only one June daily low temperature record has been set since 1979, and that was 18 years ago, on June 22, 1992.)

Other temperatures around the region include:

Baltimore (BWI)   100 (old record 98, 1966)
Richmond          101 (old record 100, 1948)
Petersburg VA     100
Williamsburg VA   102
Patuxent River MD 100
Fredericksburg VA  99
Frederick MD       99
Leesburg VA        99
Ocean City MD      98