Watches, Warnings & Advisories



4 products issued by NWS for: 2 Miles NW Mc Lean VA

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Baltimore MD/Washington DC
400 AM EDT Thu Jul 4 2024

ANZ530>543-DCZ001-MDZ008-011-013-014-016>018-504-506-508-
VAZ053>057-527-051000-
Chesapeake Bay north of Pooles Island MD-
Chesapeake Bay from Pooles Island to Sandy Point MD-
Chesapeake Bay from Sandy Point to North Beach MD-
Chesapeake Bay from North Beach to Drum Point MD-
Chesapeake Bay from Drum Point MD to Smith Point VA-
Tidal Potomac from Key Bridge to Indian Head MD-
Tidal Potomac from Indian Head to Cobb Island MD-
Tidal Potomac from Cobb Island MD to Smith Point VA-
Patapsco River including Baltimore Harbor-
Chester River to Queenstown MD-Eastern Bay-
Choptank River to Cambridge MD and the Little Choptank River-
Patuxent River to Broomes Island MD-
Tangier Sound and the inland waters surrounding Bloodsworth
Island-District of Columbia-Cecil-Southern Baltimore-
Prince Georges-Anne Arundel-Charles-St. Marys-Calvert-
Central and Southeast Montgomery-Central and Southeast Howard-
Southeast Harford-Fairfax-Arlington/Falls Church/Alexandria-
Stafford-Spotsylvania-King George-
Central and Southeast Prince William/Manassas/Manassas Park-
400 AM EDT Thu Jul 4 2024

This Hazardous Weather Outlook is for the Maryland portion of the
Chesapeake Bay, Tidal Potomac River, and I-95 corridor through
central Maryland, northern Virginia, and District of Columbia.

.DAY ONE...Today and Tonight

Hot and humid conditions are expected today. This could lead to
an increased risk of heat illness for those outdoors. A Heat
Advisory is in effect from noon to 8 PM today for most of the
area.

A few severe thunderstorms are possible this afternoon and
evening. Damaging wind gusts are the primary threat. Isolated
instances of flooding are possible as well.

Special Marine Warnings may be needed this afternoon as strong to
severe thunderstorms move across the local waters.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Heat and humidity could lead to an increased risk of heat illness
for those outdoors Friday. A Heat Advisory is in effect for much
of the area from noon to 8 PM Friday. Hot and humid conditions
will likely continue Saturday.

Scattered severe thunderstorms are possible Saturday afternoon
and evening. Damaging wind gusts are the primary threat. Isolated
instances of flooding are possible as well.

.SPOTTER INFORMATION STATEMENT...

Spotter should report instances of wind damage and flooding to the
National Weather Service through this evening.

$$



Heat Advisory

URGENT - WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
352 AM EDT Thu Jul 4 2024

DCZ001-MDZ011-013-014-016-504-506-VAZ053>056-527-042000-
/O.NEW.KLWX.HT.Y.0005.240705T1600Z-240706T0000Z/
/O.CON.KLWX.HT.Y.0004.240704T1600Z-240705T0000Z/
District of Columbia-Southern Baltimore-Prince Georges-
Anne Arundel-Charles-Central and Southeast Montgomery-
Central and Southeast Howard-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
Central and Southeast Prince William/Manassas/Manassas Park-
Including the cities of Washington, Baltimore, Bowie,
Suitland-Silver Hill, Clinton, College Park, Greenbelt, Laurel,
Camp Springs, Glen Burnie, Annapolis, Severn, South Gate,
Severna Park, Arnold, Odenton, St. Charles, Waldorf, Bethesda,
Rockville, Gaithersburg, Silver Spring, Columbia, Ellicott City,
Reston, Herndon, Annandale, Centreville, Chantilly, McLean,
Franconia, Arlington, Alexandria, Falls Church, Falmouth,
Fredericksburg, Dale City, Manassas, Woodbridge, Lake Ridge,
and Montclair
352 AM EDT Thu Jul 4 2024

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM EDT
THIS EVENING...
...HEAT ADVISORY IN EFFECT FROM NOON TO 8 PM EDT FRIDAY...

* WHAT...For the first Heat Advisory, heat index values between
  100 to 105 expected. For the second Heat Advisory, heat index
  values up to 107 expected.

* WHERE...Portions of central, northern and southern Maryland,
  The District of Columbia and central and northern Virginia.

* WHEN...For the first Heat Advisory, from noon today to 8 PM
  EDT this evening. For the second Heat Advisory, from noon to 8
  PM EDT Friday.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses to occur.

* ADDITIONAL DETAILS...The combination of air temperatures in the
  90s and high humidity will result in the potential for increased
  heat-related illnesses, especially those partaking in outdoor
  Independence Day activities today.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

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 lightweight and loose fitting clothing when
possible. 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 9 1 1.

&&

$$



Heat Advisory

URGENT - WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
352 AM EDT Thu Jul 4 2024

DCZ001-MDZ011-013-014-016-504-506-VAZ053>056-527-042000-
/O.NEW.KLWX.HT.Y.0005.240705T1600Z-240706T0000Z/
/O.CON.KLWX.HT.Y.0004.240704T1600Z-240705T0000Z/
District of Columbia-Southern Baltimore-Prince Georges-
Anne Arundel-Charles-Central and Southeast Montgomery-
Central and Southeast Howard-Fairfax-
Arlington/Falls Church/Alexandria-Stafford-Spotsylvania-
Central and Southeast Prince William/Manassas/Manassas Park-
Including the cities of Washington, Baltimore, Bowie,
Suitland-Silver Hill, Clinton, College Park, Greenbelt, Laurel,
Camp Springs, Glen Burnie, Annapolis, Severn, South Gate,
Severna Park, Arnold, Odenton, St. Charles, Waldorf, Bethesda,
Rockville, Gaithersburg, Silver Spring, Columbia, Ellicott City,
Reston, Herndon, Annandale, Centreville, Chantilly, McLean,
Franconia, Arlington, Alexandria, Falls Church, Falmouth,
Fredericksburg, Dale City, Manassas, Woodbridge, Lake Ridge,
and Montclair
352 AM EDT Thu Jul 4 2024

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM EDT
THIS EVENING...
...HEAT ADVISORY IN EFFECT FROM NOON TO 8 PM EDT FRIDAY...

* WHAT...For the first Heat Advisory, heat index values between
  100 to 105 expected. For the second Heat Advisory, heat index
  values up to 107 expected.

* WHERE...Portions of central, northern and southern Maryland,
  The District of Columbia and central and northern Virginia.

* WHEN...For the first Heat Advisory, from noon today to 8 PM
  EDT this evening. For the second Heat Advisory, from noon to 8
  PM EDT Friday.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses to occur.

* ADDITIONAL DETAILS...The combination of air temperatures in the
  90s and high humidity will result in the potential for increased
  heat-related illnesses, especially those partaking in outdoor
  Independence Day activities today.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

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 lightweight and loose fitting clothing when
possible. 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 9 1 1.

&&

$$



Air Quality Alert

VAZ053-054-505-506-526-527-050400-
Fairfax-Western Loudoun-Eastern Loudoun-Northwest Prince William-
Central and Southeast Prince William/Manassas/Manassas Park-
Arlington/Falls Church/Alexandria-
440 PM EDT Wed Jul 3 2024

...AIR QUALITY ALERT IS IN EFFECT FOR THURSDAY JULY 4 2024...

The Virginia Department of Environmental Quality has issued a
Code ORANGE Air Quality Alert Thursday for
Northern Virginia.

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
visit the web site Virginia DEQ air quality web site at
www.deq.virginia.gov.

$$