876
AUUS46 KPDT 181225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT THU JUN 18 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SW 3-7 MPH. N 4-9 MPH.
TRANSPORT WINDS SW 4-8 MPH. N 4-9 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI JUN 19 FAIR.
OUTLOOK FOR SAT JUN 20 GOOD.
VENTILATION INDEX (CATEGORY) 76 (POOR). 263 (POOR).
OUTLOOK FOR FRI JUN 19 457 (FAIR).
OUTLOOK FOR SAT JUN 20 929 (GOOD).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 3-7 MPH. SE 2-5 MPH.
TRANSPORT WINDS NW 5-10 MPH. NE 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 7000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR FRI JUN 19 FAIR.
OUTLOOK FOR SAT JUN 20 FAIR.
VENTILATION INDEX (CATEGORY) 76 (POOR). 202 (POOR).
OUTLOOK FOR FRI JUN 19 515 (FAIR).
OUTLOOK FOR SAT JUN 20 542 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 0-2 MPH. N 4-8 MPH.
TRANSPORT WINDS W 3-6 MPH. NW 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI JUN 19 GOOD.
OUTLOOK FOR SAT JUN 20 GOOD.
VENTILATION INDEX (CATEGORY) 46 (POOR). 271 (POOR).
OUTLOOK FOR FRI JUN 19 405 (FAIR).
OUTLOOK FOR SAT JUN 20 595 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 2-9 MPH. N 5-9 MPH.
TRANSPORT WINDS S 6-12 MPH. NW 5-9 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR FRI JUN 19 FAIR.
OUTLOOK FOR SAT JUN 20 GOOD.
VENTILATION INDEX (CATEGORY) 85 (POOR). 263 (POOR).
OUTLOOK FOR FRI JUN 19 454 (FAIR).
OUTLOOK FOR SAT JUN 20 828 (GOOD).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 221 (POOR)
ELLENSBURG 211 (POOR)
GOLDENDALE 289 (POOR)
TRI-CITIES 247 (POOR)
WALLA WALLA 173 (POOR)
YAKIMA 128 (POOR)
BEND 163 (POOR)
PRINEVILLE 250 (POOR)
ENTERPRISE 313 (FAIR)
HERMISTON 185 (POOR)
JOHN DAY 229 (POOR)
LA GRANDE 294 (POOR)
MADRAS 245 (POOR)
MEACHAM 247 (POOR)
PENDLETON 288 (POOR)
REDMOND 275 (POOR)
SENECA 318 (FAIR)
THE DALLES 203 (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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