Accokeek, MD

5:00 AM EDT on July 19, 2019 (GMT -0400)
14800 Cactus Hill Rd. | | Change Station

Elev 193 ft 38.69 °N, 77.06 °W | Updated 1 second ago

Clear
Clear
75.9 °F
Feels Like 75 °F
N
0
Wind Variable Wind from South
Gusts 0.0 mph

Today
High -- | Low -- °F
--% Chance of Precip.
Yesterday
High -- | Low -- °F
Precip. -- in
Pressure 29.92 in
Visibility 6.0 miles
Clouds Clear
Heat Index 75 °F
Dew Point 75 °F
Humidity 99%
Rainfall 0.00 in
Snow Depth Not available.
5:58 AM 8:29 PM
Waning Gibbous, 94% visible
METAR KDAA 190856Z AUTO 00000KT 6SM BR CLR 24/23 A2991 RMK AO2 SLP131 T02350230 58000 $
Pressure 29.92 in
Visibility 6.0 miles
Clouds Clear
Heat Index 75 °F
Dew Point 75 °F
Humidity 99%
Rainfall 0.00 in
Snow Depth Not available.
5:58 AM 8:29 PM
Waning Gibbous, 94% visible
METAR KDAA 190856Z AUTO 00000KT 6SM BR CLR 24/23 A2991 RMK AO2 SLP131 T02350230 58000 $

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10-Day Weather Forecast

Almanac

Astronomy

Jul. 19, 2019 Rise Set
Actual Time
Civil Twilight
Nautical Twilight
Astronomical Twilight
Moon
Length of Visible Light
Length of Day
Tomorrow will be .
, % of the Moon is Illuminated

Today's Extremes

State Highs State Lows

Community

WunderPhotos

Category 6

Welcome to Category 6. This is the collective home for Weather Underground's featured writeups by Dr. Jeff Masters (right), Bob Henson (left), Chris Burt, and other regular contributors.

Nearby

Air Quality

  Air Quality AQ Index Pollutant
Not available.

Snow Depth

Station Depth Elevation

Earthquake Activity

City Distance Mag. Time & Date
Minimum magnitude displayed is 2.5.

Coastal Water Temperatures

Place Temperature

Stations

Nearby Weather Stations

Station Location Temp. Windchill Dew Point Humidity Wind Precip. Elev Updated Type
                   

Watches & Warnings

Excessive Heat Warning, Excessive Heat Watch
Issued: 3:52 AM EDT Jul. 19, 2019 – National Weather Service

... Excessive heat warning in effect from 11 am this morning to
9 PM EDT this evening...
... Excessive heat watch remains in effect from Saturday morning
through Saturday evening...
... Excessive heat watch remains in effect from Sunday morning
through Sunday evening...

The National Weather Service in Baltimore MD/Washington has
upgraded the heat advisory to an excessive heat warning, which is
in effect from 11 am this morning to 9 PM EDT this evening. The
heat advisory is no longer in effect.

* Heat index values... near 110 degrees today, then potentially 110
to 115 degrees Saturday and Sunday due to temperatures in the
upper 90s to around 100 degrees and dewpoints in the lower to
middle 70s.

* Impacts... dangerously high temperatures and humidity could
quickly cause heat stress or heat stroke if precautions are
not taken.

Precautionary/preparedness actions...

An excessive heat warning means that a prolonged period of
dangerously high temperatures will occur. The combination of
extreme temperatures and high humidity will create a dangerous
situation in which heat illnesses are expected. Check in on
relatives and neighbors.

An excessive heat watch means that a prolonged period of
dangerously high temperatures is possible. Prepare for extreme
temperatures and high humidity which would create a situation in
which heat illnesses are expected.

Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

To reduce risk during outdoor work, the occupational safety and
health administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by
heat should be moved to a cool and shaded location. Heat stroke
is an emergency - call 911.








Air Quality Alert
Issued: 4:40 PM EDT Jul. 18, 2019 – National Weather Service

... Air quality alert is in effect for Friday July 19 2019...

The metropolitan Washington Council of governments in association
with Maryland department of the environment, Virginia department
of environmental quality, and district department of environment
has issued a code Orange air quality alert Friday for
the DC Metro area.

A code Orange air quality alert means that air pollution
concentrations within the region may become unhealthy for
sensitive groups. Sensitive groups include children, people
suffering from asthma, heart disease or other lung diseases and
the elderly. The effects of air pollution can be minimized by
avoiding strenuous activity or exercise outdoors.

For more information on ground-level ozone and fine particles
please visit the Maryland department of the environment web
site at wwww.Mde.Maryland.Gov/programs/air/.



440 PM EDT Thu Jul 18 2019

... Air quality alert is in effect for Friday July 19 2019...

The metropolitan Washington Council of governments in association
with Maryland department of the environment, Virginia department
of environmental quality, and district department of environment
has issued a code Orange air quality alert Friday for
the DC Metro area.

A code Orange air quality alert means that air pollution
concentrations within the region may become unhealthy for
sensitive groups. Sensitive groups include children, people
suffering from asthma, heart disease or other lung diseases and
the elderly. The effects of air pollution can be minimized by
avoiding strenuous activity or exercise outdoors.

For more information on ground-level ozone and fine particles
please visit the Maryland department of the environment web
site at wwww.Mde.Maryland.Gov/programs/air/.



440 PM EDT Thu Jul 18 2019

... Air quality alert is in effect for Friday July 19 2019...

The metropolitan Washington Council of governments in association
with Maryland department of the environment, Virginia department
of environmental quality, and district department of environment
has issued a code Orange air quality alert Friday for
the DC Metro area.

A code Orange air quality alert means that air pollution
concentrations within the region may become unhealthy for
sensitive groups. Sensitive groups include children, people
suffering from asthma, heart disease or other lung diseases and
the elderly. The effects of air pollution can be minimized by
avoiding strenuous activity or exercise outdoors.

For more information on ground-level ozone and fine particles
please visit the Maryland department of the environment web
site at wwww.Mde.Maryland.Gov/programs/air/.



440 PM EDT Thu Jul 18 2019

... Air quality alert is in effect for Friday July 19 2019...

The metropolitan Washington Council of governments in association
with Maryland department of the environment, Virginia department
of environmental quality, and district department of environment
has issued a code Orange air quality alert Friday for
the DC Metro area.

A code Orange air quality alert means that air pollution
concentrations within the region may become unhealthy for
sensitive groups. Sensitive groups include children, people
suffering from asthma, heart disease or other lung diseases and
the elderly. The effects of air pollution can be minimized by
avoiding strenuous activity or exercise outdoors.

For more information on ground-level ozone and fine particles
please visit the Maryland department of the environment web
site at wwww.Mde.Maryland.Gov/programs/air/.