822
AUUS46 KPDT 091146
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
446 AM PDT FRI MAY 9 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS E 2-5 MPH. N 4-8 MPH.
TRANSPORT WINDS E 2-5 MPH. NW 5-10 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT MAY 10 GOOD.
OUTLOOK FOR SUN MAY 11 FAIR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 134 (POOR).
OUTLOOK FOR SAT MAY 10 588 (FAIR).
OUTLOOK FOR SUN MAY 11 433 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 2-5 MPH. SE 4-8 MPH.
TRANSPORT WINDS NW 2-5 MPH. S 6-11 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT MAY 10 GOOD.
OUTLOOK FOR SUN MAY 11 GOOD.
VENTILATION INDEX (CATEGORY) 25 (POOR). 238 (POOR).
OUTLOOK FOR SAT MAY 10 765 (GOOD).
OUTLOOK FOR SUN MAY 11 701 (GOOD).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS W 2-4 MPH. S 9-14 MPH.
TRANSPORT WINDS SE 3-6 MPH. S 15-20 MPH.
MIXING HEIGHT NEAR SURFACE. 11000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR SAT MAY 10 FAIR.
OUTLOOK FOR SUN MAY 11 FAIR.
VENTILATION INDEX (CATEGORY) 46 (POOR). 818 (GOOD).
OUTLOOK FOR SAT MAY 10 288 (POOR).
OUTLOOK FOR SUN MAY 11 266 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 3-6 MPH. N 5-10 MPH.
TRANSPORT WINDS SE 3-6 MPH. N 5-10 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR SAT MAY 10 FAIR.
OUTLOOK FOR SUN MAY 11 FAIR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 134 (POOR).
OUTLOOK FOR SAT MAY 10 409 (FAIR).
OUTLOOK FOR SUN MAY 11 304 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 434 (FAIR)
ELLENSBURG 423 (FAIR)
GOLDENDALE 190 (POOR)
TRI-CITIES 73 (POOR)
WALLA WALLA 86 (POOR)
YAKIMA 313 (FAIR)
BEND 878 (GOOD)
PRINEVILLE 674 (GOOD)
ENTERPRISE 994 (GOOD)
HERMISTON 118 (POOR)
JOHN DAY 1050 (GOOD)
LA GRANDE 792 (GOOD)
MADRAS 328 (FAIR)
MEACHAM 168 (POOR)
PENDLETON 167 (POOR)
REDMOND 577 (FAIR)
SENECA 1050 (GOOD)
THE DALLES 107 (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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