192
AUUS46 KPDT 011225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT FRI MAY 1 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SE 3-7 MPH. NE 5-10 MPH.
TRANSPORT WINDS SE 4-8 MPH. SE 5-10 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT MAY 2 FAIR.
OUTLOOK FOR SUN MAY 3 FAIR.
VENTILATION INDEX (CATEGORY) 32 (POOR). 280 (POOR).
OUTLOOK FOR SAT MAY 2 211 (POOR).
OUTLOOK FOR SUN MAY 3 355 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 2-5 MPH. E 5-7 MPH.
TRANSPORT WINDS NW 3-6 MPH. S 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 8000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT MAY 2 FAIR.
OUTLOOK FOR SUN MAY 3 FAIR.
VENTILATION INDEX (CATEGORY) 28 (POOR). 357 (FAIR).
OUTLOOK FOR SAT MAY 2 575 (FAIR).
OUTLOOK FOR SUN MAY 3 470 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS SE 3-6 MPH. SE 11-18 MPH.
TRANSPORT WINDS S 6-8 MPH. S 15-18 MPH.
MIXING HEIGHT 4000 FT MSL. 9500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SAT MAY 2 GOOD.
OUTLOOK FOR SUN MAY 3 GOOD.
VENTILATION INDEX (CATEGORY) 120 (POOR). 825 (GOOD).
OUTLOOK FOR SAT MAY 2 567 (FAIR).
OUTLOOK FOR SUN MAY 3 460 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 5-9 MPH. N 5-10 MPH.
TRANSPORT WINDS SE 8-14 MPH. SE 5-9 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT MAY 2 FAIR.
OUTLOOK FOR SUN MAY 3 FAIR.
VENTILATION INDEX (CATEGORY) 82 (POOR). 336 (FAIR).
OUTLOOK FOR SAT MAY 2 214 (POOR).
OUTLOOK FOR SUN MAY 3 299 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 516 (FAIR)
ELLENSBURG 456 (FAIR)
GOLDENDALE 366 (FAIR)
TRI-CITIES 198 (POOR)
WALLA WALLA 120 (POOR)
YAKIMA 404 (FAIR)
BEND 990 (GOOD)
PRINEVILLE 1050 (GOOD)
ENTERPRISE 443 (FAIR)
HERMISTON 228 (POOR)
JOHN DAY 1050 (GOOD)
LA GRANDE 833 (GOOD)
MADRAS 881 (GOOD)
MEACHAM 602 (GOOD)
PENDLETON 467 (FAIR)
REDMOND 996 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 294 (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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