889
AUUS46 KPDT 141225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI AUG 14 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS W 2-6 MPH. N 5-9 MPH.
TRANSPORT WINDS NW 5-10 MPH. NW 5-9 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT AUG 15 POOR.
OUTLOOK FOR SUN AUG 16 FAIR.
VENTILATION INDEX (CATEGORY) 50 (POOR). 382 (FAIR).
OUTLOOK FOR SAT AUG 15 210 (POOR).
OUTLOOK FOR SUN AUG 16 281 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-5 MPH. E 2-6 MPH.
TRANSPORT WINDS N 5-10 MPH. S 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR SAT AUG 15 POOR.
OUTLOOK FOR SUN AUG 16 FAIR.
VENTILATION INDEX (CATEGORY) 69 (POOR). 269 (POOR).
OUTLOOK FOR SAT AUG 15 125 (POOR).
OUTLOOK FOR SUN AUG 16 391 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 0-2 MPH. S 2-3 MPH.
TRANSPORT WINDS S 3-5 MPH. S 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SAT AUG 15 FAIR.
OUTLOOK FOR SUN AUG 16 GOOD.
VENTILATION INDEX (CATEGORY) 40 (POOR). 322 (FAIR).
OUTLOOK FOR SAT AUG 15 294 (POOR).
OUTLOOK FOR SUN AUG 16 347 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 1-4 MPH. N 5-9 MPH.
TRANSPORT WINDS S 4-6 MPH. NW 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT AUG 15 POOR.
OUTLOOK FOR SUN AUG 16 FAIR.
VENTILATION INDEX (CATEGORY) 33 (POOR). 428 (FAIR).
OUTLOOK FOR SAT AUG 15 187 (POOR).
OUTLOOK FOR SUN AUG 16 279 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 150 (POOR)
ELLENSBURG 273 (POOR)
GOLDENDALE 337 (FAIR)
TRI-CITIES 319 (FAIR)
WALLA WALLA 368 (FAIR)
YAKIMA 319 (FAIR)
BEND 550 (FAIR)
PRINEVILLE 421 (FAIR)
ENTERPRISE 210 (POOR)
HERMISTON 335 (FAIR)
JOHN DAY 254 (POOR)
LA GRANDE 327 (FAIR)
MADRAS 338 (FAIR)
MEACHAM 320 (FAIR)
PENDLETON 435 (FAIR)
REDMOND 433 (FAIR)
SENECA 320 (FAIR)
THE DALLES 282 (POOR)
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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