383
WWUS75 KBOI 211848
NPWBOI
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BOISE ID
1248 PM MDT FRI AUG 21 2026
IDZ012-014-220300-
/O.NEW.KBOI.WI.Y.0012.260822T0000Z-260822T0400Z/
/O.CON.KBOI.HT.Y.0007.000000T0000Z-260822T0300Z/
LOWER TREASURE VALLEY-UPPER TREASURE VALLEY-
INCLUDING THE CITIES OF CALDWELL, NAMPA, AND BOISE
1248 PM MDT FRI AUG 21 2026
..WIND ADVISORY IN EFFECT FROM 6 PM TO 10 PM MDT THIS EVENING
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
* WHAT...FOR THE HEAT ADVISORY, TEMPERATURES 98 TO 103 DEGREES. FOR
THE WIND ADVISORY, SOUTH WINDS 25 TO 35 MPH WITH GUSTS UP TO 65 MPH
EXPECTED.
* WHERE...LOWER TREASURE VALLEY AND UPPER TREASURE VALLEY.
* WHEN...FOR THE HEAT ADVISORY, UNTIL 9 PM MDT THIS EVENING. FOR THE
WIND ADVISORY, FROM 6 PM TO 10 PM MDT THIS EVENING.
* IMPACTS...GUSTY WINDS WILL BLOW AROUND UNSECURED OBJECTS. TREE
LIMBS COULD BE BLOWN DOWN AND A FEW POWER OUTAGES MAY RESULT. HOT
TEMPERATURES MAY CAUSE HEAT ILLNESSES.
* ADDITIONAL DETAILS...STRONG GUSTS FROM THE SOUTH AND SOUTHWEST WILL
CREATE AREAS OF BLOWING DUST AND VISIBILITY AS LOW AS ONE MILE,
ADVANCING NORTHWARD THROUGH THE SNAKE BASIN, WITH GREATEST IMPACTS
BETWEEN 800 PM AND 930 PM MDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT, ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.
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.
IDZ015-029-220300-
/O.NEW.KBOI.WI.Y.0012.260822T0000Z-260822T0400Z/
SOUTHWEST HIGHLANDS-OWYHEE MOUNTAINS-
INCLUDING THE CITIES OF RIDDLE, GRASMERE, SILVER CITY, REYNOLDS,
THREE CREEK, AND MURPHY HOT SPRINGS
1248 PM MDT FRI AUG 21 2026
..WIND ADVISORY IN EFFECT FROM 6 PM TO 10 PM MDT THIS EVENING
* WHAT...SOUTH WINDS 20 TO 30 MPH WITH GUSTS UP TO 55 MPH EXPECTED.
* WHERE...OWYHEE MOUNTAINS AND SOUTHWEST HIGHLANDS.
* WHEN...FROM 6 PM TO 10 PM MDT THIS EVENING.
* IMPACTS...GUSTY WINDS WILL BLOW AROUND UNSECURED OBJECTS. TREE
LIMBS COULD BE BLOWN DOWN AND A FEW POWER OUTAGES MAY RESULT.
* ADDITIONAL DETAILS...STRONG GUSTS FROM THE SOUTH AND SOUTHWEST WILL
CREATE AREAS OF BLOWING DUST AND VISIIBILITY AS LOW AS ONE MILE,
ADVANCING NORTHWARD THROUGH THE AREA, WITH GREATEST IMPACTS BETWEEN
630 PM AND 900 PM MDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT, ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.
IDZ016-033-ORZ064-220300-
/O.CON.KBOI.HT.Y.0007.000000T0000Z-260822T0300Z/
WESTERN MAGIC VALLEY-UPPER WEISER RIVER-OREGON LOWER TREASURE
VALLEY-
INCLUDING THE CITIES OF GOODRICH, MESA, NYSSA, CAMBRIDGE, FRUITVALE,
GLENDALE, ONTARIO, TWIN FALLS, INDIAN VALLEY, AND COUNCIL
1248 PM MDT FRI AUG 21 2026 /1148 AM PDT FRI AUG 21 2026/
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT /8 PM PDT/ THIS
EVENING...
* WHAT...TEMPERATURES NEAR 100 DEGREES.
* WHERE...IN IDAHO, WESTERN MAGIC VALLEY AND UPPER WEISER RIVER. IN
OREGON, OREGON LOWER TREASURE VALLEY.
* WHEN...UNTIL 9 PM MDT /8 PM PDT/ THIS EVENING.
* IMPACTS...HOT TEMPERATURES 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.
LC
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