053
AUUS46 KPDT 031325
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PST TUE NOV  3 2026

*** AIR DISPERSION CATEGORIES:   GOOD, FAIR, POOR ***

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NE 2-6 MPH.         NW 2-8 MPH.
TRANSPORT WINDS               W 3-8 MPH.          N 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED NOV 4         POOR.
OUTLOOK FOR THU NOV 5         FAIR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          58 (POOR).
OUTLOOK FOR WED NOV 4         69 (POOR).
OUTLOOK FOR THU NOV 5         423 (FAIR).

FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         NW 2-5 MPH.
TRANSPORT WINDS               NW 4-8 MPH.         N 3-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED NOV 4         POOR.
OUTLOOK FOR THU NOV 5         POOR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          61 (POOR).
OUTLOOK FOR WED NOV 4         59 (POOR).
OUTLOOK FOR THU NOV 5         130 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 4-11 MPH.        S 8-13 MPH.
TRANSPORT WINDS               S 10-21 MPH.        S 14-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR WED NOV 4         FAIR.
OUTLOOK FOR THU NOV 5         FAIR.

VENTILATION INDEX (CATEGORY)  83 (POOR).          336 (FAIR).
OUTLOOK FOR WED NOV 4         86 (POOR).
OUTLOOK FOR THU NOV 5         254 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-6 MPH.         NW 2-5 MPH.
TRANSPORT WINDS               S 5-10 MPH.         E 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED NOV 4         POOR.
OUTLOOK FOR THU NOV 5         FAIR.

VENTILATION INDEX (CATEGORY)  28 (POOR).          49 (POOR).
OUTLOOK FOR WED NOV 4         77 (POOR).
OUTLOOK FOR THU NOV 5         470 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       87 (POOR)
ELLENSBURG     45 (POOR)
GOLDENDALE     81 (POOR)
TRI-CITIES     63 (POOR)
WALLA WALLA    25 (POOR)
YAKIMA         62 (POOR)
BEND           67 (POOR)
PRINEVILLE     52 (POOR)
ENTERPRISE     50 (POOR)
HERMISTON      68 (POOR)
JOHN DAY      184 (POOR)
LA GRANDE     336 (FAIR)
MADRAS         67 (POOR)
MEACHAM       136 (POOR)
PENDLETON      57 (POOR)
REDMOND        25 (POOR)
SENECA        206 (POOR)
THE DALLES     88 (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.
$$