162
AUUS46 KPDT 091122
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
422 AM PDT SUN MAR 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                 S 5-10 MPH.         W 8-14 MPH.
TRANSPORT WINDS               S 6-11 MPH.         W 12-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON MAR 10        FAIR.
OUTLOOK FOR TUE MAR 11        POOR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          240 (POOR).
OUTLOOK FOR MON MAR 10        414 (FAIR).
OUTLOOK FOR TUE MAR 11        97 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 3-6 MPH.          SW 15-20 MPH.
TRANSPORT WINDS               S 4-8 MPH.          SW 26-32 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON MAR 10        FAIR.
OUTLOOK FOR TUE MAR 11        FAIR.

VENTILATION INDEX (CATEGORY)  30 (POOR).          743 (GOOD).
OUTLOOK FOR MON MAR 10        218 (POOR).
OUTLOOK FOR TUE MAR 11        136 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 12-18 MPH.        S 20-28 MPH.
TRANSPORT WINDS               S 14-19 MPH.        S 22-30 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR MON MAR 10        FAIR.
OUTLOOK FOR TUE MAR 11        GOOD.

VENTILATION INDEX (CATEGORY)  115 (POOR).         444 (FAIR).
OUTLOOK FOR MON MAR 10        235 (POOR).
OUTLOOK FOR TUE MAR 11        549 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 9-15 MPH.        W 8-14 MPH.
TRANSPORT WINDS               S 10-16 MPH.        SW 12-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR MON MAR 10        FAIR.
OUTLOOK FOR TUE MAR 11        FAIR.

VENTILATION INDEX (CATEGORY)  41 (POOR).          321 (FAIR).
OUTLOOK FOR MON MAR 10        388 (FAIR).
OUTLOOK FOR TUE MAR 11        158 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      422 (FAIR)
ELLENSBURG    435 (FAIR)
GOLDENDALE    504 (FAIR)
TRI-CITIES    403 (FAIR)
WALLA WALLA   235 (POOR)
YAKIMA        537 (FAIR)
BEND          705 (GOOD)
PRINEVILLE    790 (GOOD)
ENTERPRISE    230 (POOR)
HERMISTON     189 (POOR)
JOHN DAY      595 (FAIR)
LA GRANDE     373 (FAIR)
MADRAS        705 (GOOD)
MEACHAM       434 (FAIR)
PENDLETON     183 (POOR)
REDMOND       730 (GOOD)
SENECA        463 (FAIR)
THE DALLES    351 (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.
$$