213
AUUS46 KPDT 191225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN JUL 19 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 3-8 MPH. NW 4-8 MPH.
TRANSPORT WINDS SW 4-8 MPH. W 4-8 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON JUL 20 POOR.
OUTLOOK FOR TUE JUL 21 FAIR.
VENTILATION INDEX (CATEGORY) 65 (POOR). 228 (POOR).
OUTLOOK FOR MON JUL 20 143 (POOR).
OUTLOOK FOR TUE JUL 21 212 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-4 MPH. E 2-6 MPH.
TRANSPORT WINDS NW 3-7 MPH. SW 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 6000 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON JUL 20 FAIR.
OUTLOOK FOR TUE JUL 21 POOR.
VENTILATION INDEX (CATEGORY) 42 (POOR). 181 (POOR).
OUTLOOK FOR MON JUL 20 203 (POOR).
OUTLOOK FOR TUE JUL 21 157 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS N 0-2 MPH. N 6-9 MPH.
TRANSPORT WINDS NW 3-6 MPH. W 9-11 MPH.
MIXING HEIGHT NEAR SURFACE. 8500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR MON JUL 20 FAIR.
OUTLOOK FOR TUE JUL 21 GOOD.
VENTILATION INDEX (CATEGORY) 37 (POOR). 380 (FAIR).
OUTLOOK FOR MON JUL 20 318 (FAIR).
OUTLOOK FOR TUE JUL 21 370 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 2-8 MPH. NW 6-8 MPH.
TRANSPORT WINDS S 5-10 MPH. W 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON JUL 20 FAIR.
OUTLOOK FOR TUE JUL 21 FAIR.
VENTILATION INDEX (CATEGORY) 66 (POOR). 260 (POOR).
OUTLOOK FOR MON JUL 20 176 (POOR).
OUTLOOK FOR TUE JUL 21 282 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 326 (FAIR)
ELLENSBURG 258 (POOR)
GOLDENDALE 249 (POOR)
TRI-CITIES 134 (POOR)
WALLA WALLA 240 (POOR)
YAKIMA 160 (POOR)
BEND 471 (FAIR)
PRINEVILLE 445 (FAIR)
ENTERPRISE 454 (FAIR)
HERMISTON 196 (POOR)
JOHN DAY 572 (FAIR)
LA GRANDE 414 (FAIR)
MADRAS 268 (POOR)
MEACHAM 251 (POOR)
PENDLETON 255 (POOR)
REDMOND 421 (FAIR)
SENECA 868 (GOOD)
THE DALLES 269 (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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