564
AUUS46 KPDT 171225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT MON AUG 17 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS S 2-8 MPH. NW 3-6 MPH.
TRANSPORT WINDS SW 6-11 MPH. W 4-6 MPH.
MIXING HEIGHT NEAR SURFACE. 6500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE AUG 18 GOOD.
OUTLOOK FOR WED AUG 19 FAIR.
VENTILATION INDEX (CATEGORY) 57 (POOR). 187 (POOR).
OUTLOOK FOR TUE AUG 18 637 (GOOD).
OUTLOOK FOR WED AUG 19 370 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS W 0-5 MPH. SE 2-6 MPH.
TRANSPORT WINDS NW 4-9 MPH. SW 6-9 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE AUG 18 FAIR.
OUTLOOK FOR WED AUG 19 FAIR.
VENTILATION INDEX (CATEGORY) 38 (POOR). 285 (POOR).
OUTLOOK FOR TUE AUG 18 437 (FAIR).
OUTLOOK FOR WED AUG 19 189 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS NW 0-2 MPH. NW 3-4 MPH.
TRANSPORT WINDS N 3-6 MPH. W 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE AUG 18 GOOD.
OUTLOOK FOR WED AUG 19 GOOD.
VENTILATION INDEX (CATEGORY) 34 (POOR). 274 (POOR).
OUTLOOK FOR TUE AUG 18 634 (GOOD).
OUTLOOK FOR WED AUG 19 286 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 1-7 MPH. NW 4-7 MPH.
TRANSPORT WINDS S 5-10 MPH. NW 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE AUG 18 GOOD.
OUTLOOK FOR WED AUG 19 FAIR.
VENTILATION INDEX (CATEGORY) 48 (POOR). 216 (POOR).
OUTLOOK FOR TUE AUG 18 647 (GOOD).
OUTLOOK FOR WED AUG 19 362 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 294 (POOR)
ELLENSBURG 267 (POOR)
GOLDENDALE 343 (FAIR)
TRI-CITIES 138 (POOR)
WALLA WALLA 179 (POOR)
YAKIMA 345 (FAIR)
BEND 292 (POOR)
PRINEVILLE 433 (FAIR)
ENTERPRISE 292 (POOR)
HERMISTON 166 (POOR)
JOHN DAY 633 (GOOD)
LA GRANDE 283 (POOR)
MADRAS 303 (FAIR)
MEACHAM 255 (POOR)
PENDLETON 208 (POOR)
REDMOND 372 (FAIR)
SENECA 1049 (GOOD)
THE DALLES 317 (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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