868
AUUS46 KPDT 021225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SAT MAY 2 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 3-7 MPH. NE 6-11 MPH.
TRANSPORT WINDS E 4-8 MPH. NE 8-11 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN MAY 3 FAIR.
OUTLOOK FOR MON MAY 4 FAIR.
VENTILATION INDEX (CATEGORY) 34 (POOR). 300 (POOR).
OUTLOOK FOR SUN MAY 3 271 (POOR).
OUTLOOK FOR MON MAY 4 370 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 3-7 MPH. NE 7-10 MPH.
TRANSPORT WINDS N 5-10 MPH. E 9-11 MPH.
MIXING HEIGHT NEAR SURFACE. 9000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SUN MAY 3 POOR.
OUTLOOK FOR MON MAY 4 GOOD.
VENTILATION INDEX (CATEGORY) 77 (POOR). 629 (GOOD).
OUTLOOK FOR SUN MAY 3 314 (FAIR).
OUTLOOK FOR MON MAY 4 547 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS E 4-8 MPH. S 6-11 MPH.
TRANSPORT WINDS SE 5-9 MPH. S 10-12 MPH.
MIXING HEIGHT 4000 FT MSL. 9500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SUN MAY 3 GOOD.
OUTLOOK FOR MON MAY 4 GOOD.
VENTILATION INDEX (CATEGORY) 104 (POOR). 562 (FAIR).
OUTLOOK FOR SUN MAY 3 260 (POOR).
OUTLOOK FOR MON MAY 4 962 (GOOD).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 5-10 MPH. NE 5-9 MPH.
TRANSPORT WINDS SE 8-16 MPH. NE 7-10 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY FAIR. FAIR.
OUTLOOK FOR SUN MAY 3 FAIR.
OUTLOOK FOR MON MAY 4 FAIR.
VENTILATION INDEX (CATEGORY) 76 (POOR). 266 (POOR).
OUTLOOK FOR SUN MAY 3 249 (POOR).
OUTLOOK FOR MON MAY 4 406 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 688 (GOOD)
ELLENSBURG 743 (GOOD)
GOLDENDALE 673 (GOOD)
TRI-CITIES 356 (FAIR)
WALLA WALLA 143 (POOR)
YAKIMA 817 (GOOD)
BEND 597 (FAIR)
PRINEVILLE 758 (GOOD)
ENTERPRISE 317 (FAIR)
HERMISTON 343 (FAIR)
JOHN DAY 1013 (GOOD)
LA GRANDE 629 (GOOD)
MADRAS 482 (FAIR)
MEACHAM 461 (FAIR)
PENDLETON 344 (FAIR)
REDMOND 640 (GOOD)
SENECA 1050 (GOOD)
THE DALLES 401 (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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