Heat advisory upgraded to excessive heat warning in Washington, D.C. and Baltimore areas & Washington, D.C. shatters all-time June record high, sizzles to 104 29JUN12

IT is too hot for clothes!!!!

At a Glance

Fri

20%

-- | 101

Sat

30%

80 | 100

Sun

30%

76 | 100

Mon

30%

74 | 97

Tue

---

74 | 95

Wed

---

73 | 98

Forecast by
National Weather Service

RIGHT NOW

DCA | IAD | BWI

National Airport

• Weather: Partly Cloudy
• Temp: 100.0 F (37.8 C)
• Heat Index: 108 F (42 C)
• Wind: Northeast at 8.1 MPH
• Dew Point: 70.0 F
• Pressure: 1007.5 mb

Jun 29 2012, 12:52 pm EDT

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90-degree days in 2012

11

Record: 67
(2010, 1980)
Average: 36

• Washington, D.C. ties record high of 101
• Disproportionate June record heat in last 25 years in Washington, D.C.
• Heat advisory upgraded to excessive heat warning in Washington, D.C. and Baltimore areas
• D.C. area forecast: Ready or not, here comes intense heat
• Vulnerable to extreme temperatures: CWG helped one charity help the homeless

Heat advisory upgraded to excessive heat warning in Washington, D.C. and Baltimore areas

By Jason Samenow

Areas in pink are under an excessive heat warning; all other areas are under a heat advisory today. An excessive heat watch is in effect for most of the area Saturday. (National Weather Service) The National Weather Service has upgraded today’s heat advisory to an excessive heat warning for Washington, D.C. and Baltimore and close-in suburbs. Temperatures are likely to be hotter than previously anticipated, prompting the more serious alert.
A heat advisory is issued when the heat index is forecast to reach 105, whereas an excessive heat warning is issued for hazardous heat indices of 110 or higher.
Link: Heat wave and hot weather guide
The advisory was not upgraded to a warning in the northern and eastern suburbs of D.C. (including Prince George’s, Montgomery, Howard, and Anne Arundel counties), nor in the suburbs of Baltimore - where heat indices may remain just under warning levels.

An excessive heat warning means a prolonged period of dangerous heat will occur. You are urged to drink plenty of fluids, stay in air-conditioning, stay out of the sun, and check on relatives and neighbors, especially older adults and the sick. Outdoor workers should take special precautions to reschedule strenuous activity to early and late in the day and hydrate liberally.

(UnisysWeather.com) Current temperatures support the upgrade. At 10:00 a.m., the temperature at Reagan National Airport had already risen to an incredible 96 degrees, 11 degrees higher the 9 a.m. temperature of 85. The heat index, factoring in humidity, was up to 101 degrees. (Note: Mark Richards, the weather observer at Reagan National Airport, said it was up to 97 at 10:10 a.m.)
The record high today of 101 at Reagan National airport, set in 1934, is likely to be threatened. The all-time June high of 102, set in 1874 and 2011 is also in jeopardy.
These conditions have arisen from massive, record-setting heat dome sprawled across the eastern half of the U.S. Heat advisories or heat warnings are in effect in 25 states and the District.

Washington, D.C. shatters all-time June record high, sizzles to 104

By Jason Samenow

* Excessive heat warning for Washington, D.C., Baltimore, and close-in suburbs | Officals warn of heat’s dangers | Heat guide *
UPDATE, 2:50 p.m.: Mark Richards, weather observer at Reagan National Airport, says the temperature at 2:48 p.m. hit 104, blowing by the old June record of 102 set on June 9 in both 1874 and 2011. We are now experiencing D.C.’s hottest June temperatures in 142 years of record-keeping.
UPDATE, 2 p.m.: The temperature at 2 p.m. climbed to 102, breaking the daily record of 101 set in 1934 and tying the all-time June record of 102 set on June 9, 1874 and 2011.
From 1 p.m.: At 12:48 p.m. ET, Reagan National airport (Washington, D.C.’s official observing station) touched 101 degrees, tying the record high for the date set in 1934. Dulles Airport has shattered its record high for the date of 95 (set in 1991), hitting 98 at 1 p.m.
These temperatures are likely to climb further this afternoon. D.C.’s all-time June monthly temperature record of 102 (set in 1874 and 2011) is likely to be matched if not broken.