465
WWUS71 KLWX 300703
NPWLWX
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
303 AM EDT TUE JUN 30 2026
DCZ001-MDZ004>006-008-011-013-014-016-503>508-VAZ039-040-050-051-
053>057-501-502-505-506-526-527-301515-
/O.NEW.KLWX.HT.Y.0004.260701T1500Z-260702T0000Z/
/O.NEW.KLWX.XH.A.0001.260702T1500Z-260704T0000Z/
DISTRICT OF COLUMBIA-FREDERICK-CARROLL-NORTHERN BALTIMORE-CECIL-
SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-NORTHWEST
MONTGOMERY-CENTRAL AND SOUTHEAST MONTGOMERY-NORTHWEST HOWARD-
CENTRAL AND SOUTHEAST HOWARD-NORTHWEST HARFORD-SOUTHEAST HARFORD-
MADISON-RAPPAHANNOCK-ORANGE-CULPEPER-FAIRFAX-ARLINGTON/FALLS
CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-KING GEORGE-NORTHERN
FAUQUIER-SOUTHERN FAUQUIER-WESTERN LOUDOUN-EASTERN LOUDOUN-
NORTHWEST PRINCE WILLIAM-CENTRAL AND SOUTHEAST PRINCE
WILLIAM/MANASSAS/MANASSAS PARK-
303 AM EDT TUE JUN 30 2026
..HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM EDT WEDNESDAY
...EXTREME HEAT WATCH IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
EVENING...
* WHAT...FOR THE HEAT ADVISORY, HEAT INDEX VALUES UP TO 106
EXPECTED. FOR THE EXTREME HEAT WATCH, DANGEROUSLY HOT CONDITIONS
WITH HEAT INDEX VALUES UP TO 112 POSSIBLE.
* WHERE...DC AND PORTIONS OF CENTRAL, NORTH CENTRAL, NORTHEAST,
NORTHERN, AND SOUTHERN MARYLAND, AND CENTRAL, NORTHERN, AND
NORTHWEST VIRGINIA.
* WHEN...FOR THE HEAT ADVISORY, FROM 11 AM TO 8 PM EDT WEDNESDAY.
FOR THE EXTREME HEAT WATCH, FROM THURSDAY MORNING THROUGH FRIDAY
EVENING.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT AND HIGH HUMIDITY EVENTS. HOT TEMPERATURES AND HIGH
HUMIDITY MAY CAUSE HEAT ILLNESSES.
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.
TAKE EXTRA PRECAUTIONS WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO EARLY MORNING
OR EVENING. TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE.
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.
MDZ003-VAZ027>031-WVZ051>053-301515-
/O.NEW.KLWX.HT.Y.0004.260701T1500Z-260702T0000Z/
/O.NEW.KLWX.XH.A.0001.260702T1500Z-260704T0000Z/
WASHINGTON-SHENANDOAH-FREDERICK-PAGE-WARREN-CLARKE-MORGAN-
BERKELEY-JEFFERSON-
303 AM EDT TUE JUN 30 2026
..HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM EDT WEDNESDAY
...EXTREME HEAT WATCH IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
EVENING...
* WHAT...FOR THE HEAT ADVISORY, HEAT INDEX VALUES UP TO 104
EXPECTED. FOR THE EXTREME HEAT WATCH, DANGEROUSLY HOT CONDITIONS
WITH HEAT INDEX VALUES UP TO 108 POSSIBLE.
* WHERE...IN MARYLAND, WASHINGTON COUNTY. IN VIRGINIA, CLARKE,
FREDERICK, PAGE, SHENANDOAH, AND WARREN COUNTIES. IN WEST
VIRGINIA, BERKELEY, JEFFERSON, AND MORGAN COUNTIES.
* WHEN...FOR THE HEAT ADVISORY, FROM 11 AM TO 8 PM EDT WEDNESDAY.
FOR THE EXTREME HEAT WATCH, FROM THURSDAY MORNING THROUGH FRIDAY
EVENING.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT AND HIGH HUMIDITY EVENTS. HOT TEMPERATURES AND HIGH
HUMIDITY MAY CAUSE HEAT ILLNESSES.
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.
TAKE EXTRA PRECAUTIONS WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO EARLY MORNING
OR EVENING. TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE.
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.
VAZ025-026-504-301515-
/O.NEW.KLWX.HT.Y.0004.260701T1500Z-260702T0000Z/
AUGUSTA-ROCKINGHAM-EASTERN HIGHLAND-
303 AM EDT TUE JUN 30 2026
..HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM EDT WEDNESDAY
* WHAT...HEAT INDEX VALUES UP TO 103 EXPECTED.
* WHERE...AUGUSTA, EASTERN HIGHLAND, AND ROCKINGHAM COUNTIES.
* WHEN...FROM 11 AM TO 8 PM EDT WEDNESDAY.
* IMPACTS...HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT
ILLNESSES.
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.
TAKE EXTRA PRECAUTIONS WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO EARLY MORNING
OR EVENING. TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE.
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.
VAZ036>038-301515-
/O.NEW.KLWX.HT.Y.0004.260701T1500Z-260702T0000Z/
NELSON-ALBEMARLE-GREENE-
303 AM EDT TUE JUN 30 2026
..HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM EDT WEDNESDAY
* WHAT...HEAT INDEX VALUES UP TO 109 EXPECTED.
* WHERE...ALBEMARLE, GREENE, AND NELSON COUNTIES.
* WHEN...FROM 11 AM TO 8 PM EDT WEDNESDAY.
* IMPACTS...HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT
ILLNESSES.
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.
TAKE EXTRA PRECAUTIONS WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO EARLY MORNING
OR EVENING. TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE.
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.
MDZ502-WVZ050-055-502-504-301515-
/O.NEW.KLWX.XH.A.0001.260702T1500Z-260704T0000Z/
/O.EXT.KLWX.HT.Y.0003.260630T1500Z-260702T0000Z/
CENTRAL AND EASTERN ALLEGANY-HAMPSHIRE-HARDY-EASTERN GRANT-
EASTERN MINERAL-
303 AM EDT TUE JUN 30 2026
...HEAT ADVISORY NOW IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT
WEDNESDAY...
...EXTREME HEAT WATCH IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
EVENING...
* WHAT...FOR THE HEAT ADVISORY, HEAT INDEX VALUES UP TO 104
EXPECTED. FOR THE EXTREME HEAT WATCH, DANGEROUSLY HOT CONDITIONS
WITH HEAT INDEX VALUES UP TO 105 POSSIBLE.
* WHERE...IN MARYLAND, CENTRAL AND EASTERN ALLEGANY COUNTY. IN WEST
VIRGINIA, EASTERN GRANT, EASTERN MINERAL, HAMPSHIRE, AND HARDY
COUNTIES.
* WHEN...FOR THE HEAT ADVISORY, FROM 11 AM THIS MORNING TO 8 PM EDT
WEDNESDAY. FOR THE EXTREME HEAT WATCH, FROM THURSDAY MORNING
THROUGH FRIDAY EVENING.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT AND HIGH HUMIDITY EVENTS. HOT TEMPERATURES AND HIGH
HUMIDITY MAY CAUSE HEAT ILLNESSES.
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.
TAKE EXTRA PRECAUTIONS WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO EARLY MORNING
OR EVENING. TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE.
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.
WVZ506-301515-
/O.EXT.KLWX.HT.Y.0003.260630T1500Z-260702T0000Z/
EASTERN PENDLETON-
303 AM EDT TUE JUN 30 2026
...HEAT ADVISORY NOW IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT
WEDNESDAY...
* WHAT...HEAT INDEX VALUES UP TO 100 EXPECTED.
* WHERE...EASTERN PENDLETON COUNTY.
* WHEN...FROM 11 AM THIS MORNING TO 8 PM EDT WEDNESDAY.
* IMPACTS...HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT
ILLNESSES.
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.
TAKE EXTRA PRECAUTIONS WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO EARLY MORNING
OR EVENING. TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE.
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.
MDZ017-018-301515-
/O.NEW.KLWX.XH.A.0001.260702T1500Z-260704T0000Z/
ST. MARYS-CALVERT-
303 AM EDT TUE JUN 30 2026
...EXTREME HEAT WATCH IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY
EVENING...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH HEAT INDEX VALUES UP TO 115
POSSIBLE.
* WHERE...CALVERT AND ST. MARYS COUNTIES.
* WHEN...FROM THURSDAY MORNING THROUGH FRIDAY EVENING.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT AND HIGH HUMIDITY EVENTS.
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.
TAKE EXTRA PRECAUTIONS WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO EARLY MORNING
OR EVENING. TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE.
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.
KJP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page