111
AUUS46 KPDT 241225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON AUG 24 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS E 1-5 MPH. N 8-13 MPH.
TRANSPORT WINDS NE 3-6 MPH. NE 9-13 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE AUG 25 FAIR.
OUTLOOK FOR WED AUG 26 FAIR.
VENTILATION INDEX (CATEGORY) 34 (POOR). 347 (FAIR).
OUTLOOK FOR TUE AUG 25 195 (POOR).
OUTLOOK FOR WED AUG 26 369 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-3 MPH. E 4-8 MPH.
TRANSPORT WINDS NW 4-8 MPH. E 4-7 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE AUG 25 POOR.
OUTLOOK FOR WED AUG 26 FAIR.
VENTILATION INDEX (CATEGORY) 39 (POOR). 256 (POOR).
OUTLOOK FOR TUE AUG 25 147 (POOR).
OUTLOOK FOR WED AUG 26 333 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS N 0-2 MPH. N 0-3 MPH.
TRANSPORT WINDS N 3-6 MPH. S 5-9 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE AUG 25 GOOD.
OUTLOOK FOR WED AUG 26 GOOD.
VENTILATION INDEX (CATEGORY) 30 (POOR). 205 (POOR).
OUTLOOK FOR TUE AUG 25 1043 (GOOD).
OUTLOOK FOR WED AUG 26 605 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 2-5 MPH. N 7-12 MPH.
TRANSPORT WINDS SE 4-8 MPH. N 8-13 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE AUG 25 FAIR.
OUTLOOK FOR WED AUG 26 FAIR.
VENTILATION INDEX (CATEGORY) 35 (POOR). 325 (FAIR).
OUTLOOK FOR TUE AUG 25 274 (POOR).
OUTLOOK FOR WED AUG 26 313 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 442 (FAIR)
ELLENSBURG 392 (FAIR)
GOLDENDALE 463 (FAIR)
TRI-CITIES 292 (POOR)
WALLA WALLA 331 (FAIR)
YAKIMA 262 (POOR)
BEND 278 (POOR)
PRINEVILLE 381 (FAIR)
ENTERPRISE 353 (FAIR)
HERMISTON 381 (FAIR)
JOHN DAY 841 (GOOD)
LA GRANDE 226 (POOR)
MADRAS 282 (POOR)
MEACHAM 168 (POOR)
PENDLETON 349 (FAIR)
REDMOND 222 (POOR)
SENECA 1050 (GOOD)
THE DALLES 464 (FAIR)
METEOROLOGICAL INFORMATION PROVIDED IN THIS PRODUCT REPRESENTS ONLY
SOME OF THE FACTORS USED IN BURN DECISIONS. BURN DECISIONS ARE
OUTSIDE THE PURVIEW OF THE NATIONAL WEATHER SERVICE.
THE VENTILATION INDEX IS A TOOL TO ASSIST SMOKE MANAGEMENT
AGENCIES IN DETERMINING BURN OR NO BURN DECISIONS. A VENTILATION
INDEX GRAPHIC IS ON THE PENDLETON WEBSITE AT THE FOLLOWING ADDRESS:
HTTPS://WWW.WEATHER.GOV/PDT/DSSBRIEFING
IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
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