431
WWUS75 KTWC 291639
NPWTWC
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE TUCSON AZ
939 AM MST SAT AUG 29 2026
AZZ501-502-504-505-300300-
/O.NEW.KTWC.DU.Y.0010.260829T2300Z-260830T0300Z/
/O.CON.KTWC.XH.W.0006.000000T0000Z-260830T0300Z/
WESTERN PIMA COUNTY-TOHONO O'ODHAM NATION-TUCSON METRO AREA-SOUTH
CENTRAL PINAL COUNTY-
INCLUDING THE CITIES OF AJO, PICACHO PEAK STATE PARK, TUCSON,
GREEN VALLEY, MARANA, ORGAN PIPE CACTUS N.M., SELLS, AND VAIL
939 AM MST SAT AUG 29 2026
...BLOWING DUST ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 8 PM
MST THIS EVENING...
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...
* WHAT...SCATTERED STRONG THUNDERSTORMS LATER THIS AFTERNOON WILL
PRODUCE WIND GUSTS TO 45 TO 55 MPH RESULTING IN AREAS OF BLOWING
DUST WHICH WILL REDUCE VISIBILITIES TO BETWEEN ONE-QUARTER MILE AND
ONE MILE AT TIMES. INITIAL DEVELOPMENT OF THE BLOWING DUST WILL BE
NEAR TUCSON THEN MOVE TO THE WEST AND NORTHWEST. DANGEROUSLY HOT
CONDITIONS WITH HIGH TEMPERATURES RANGING BETWEEN 104 TO 110
DEGREES AND LOW TEMPERATURES 79 TO 85 DEGREES. MAJOR TO EXTREME
HEATRISK TODAY.
* WHERE...SOUTH CENTRAL PINAL COUNTY, TOHONO O'ODHAM NATION, TUCSON
METRO AREA, AND WESTERN PIMA COUNTY.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 8 PM MST THIS EVENING.
FOR THE BLOWING DUST ADVISORY, FROM 4 PM THIS AFTERNOON TO 8 PM MST
THIS EVENING.
* IMPACTS...HAZARDOUS DRIVING CONDITIONS DUE TO REDUCED VISIBILITY.
HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING EXTREME HEAT
EVENTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PERSONS WITH RESPIRATORY PROBLEMS SHOULD MAKE PREPARATIONS TO STAY
INDOORS UNTIL THE STORM PASSES. BE READY FOR A SUDDEN DROP IN
VISIBILITY TO NEAR ZERO. IF YOU ENCOUNTER BLOWING DUST OR BLOWING
SAND ON THE ROADWAY OR SEE IT APPROACHING, PULL OFF THE ROAD AS FAR
AS POSSIBLE AND PUT YOUR VEHICLE IN PARK. TURN THE LIGHTS ALL THE WAY
OFF AND KEEP FOOT OFF THE BRAKE PEDAL. REMEMBER, 'PULL ASIDE, STAY
ALIVE'.
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.
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 AND
DRINK PLENTY OF WATER.
AZZ503-507-508-300300-
/O.CON.KTWC.XH.W.0006.000000T0000Z-260830T0300Z/
UPPER SANTA CRUZ RIVER VALLEY/ALTAR VALLEY-UPPER SAN PEDRO RIVER
VALLEY-EASTERN COCHISE COUNTY BELOW 5000 FEET-
INCLUDING THE CITIES OF NOGALES, WILLCOX, DOUGLAS, BENSON, AND SIERRA
VISTA
939 AM MST SAT AUG 29 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH TEMPERATURES 98 TO 105
DEGREES. OVERNIGHT LOWS 71 TO 78 DEGREES. MAJOR HEATRISK IS
EXPECTED TODAY WITH ISOLATED EXTREME HEATRISK.
* WHERE...EASTERN COCHISE COUNTY BELOW 5000 FEET, UPPER SAN PEDRO
RIVER VALLEY, AND UPPER SANTA CRUZ RIVER VALLEY/ALTAR VALLEY.
* WHEN...UNTIL 8 PM MST THIS EVENING.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
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 AND
DRINK PLENTY OF WATER.
AZZ506-509-300300-
/O.CON.KTWC.XH.W.0006.000000T0000Z-260830T0300Z/
SOUTHEAST PINAL COUNTY-UPPER GILA RIVER VALLEY-
INCLUDING THE CITIES OF CLIFTON, MAMMOTH, SAFFORD, AND ORACLE
939 AM MST SAT AUG 29 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH HIGH TEMPERATURES RANGING
BETWEEN 103 TO 108 DEGREES AND LOW TEMPERATURES 79 TO 85 DEGREES.
MAJOR TO EXTREME HEATRISK TODAY.
* WHERE...SOUTHEAST PINAL COUNTY AND UPPER GILA RIVER VALLEY.
* WHEN...UNTIL 8 PM MST THIS EVENING.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
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 AND
DRINK PLENTY OF WATER.
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