026
AUUS46 KPDT 021225
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED JUL  2 2025

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 10-19 MPH.       W 14-20 MPH.
TRANSPORT WINDS               SW 11-19 MPH.       W 16-23 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR THU JUL 3         FAIR.
OUTLOOK FOR FRI JUL 4         GOOD.

VENTILATION INDEX (CATEGORY)  93 (POOR).          578 (FAIR).
OUTLOOK FOR THU JUL 3         521 (FAIR).
OUTLOOK FOR FRI JUL 4         562 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 5-10 MPH.         NW 10-14 MPH.
TRANSPORT WINDS               NW 7-13 MPH.        W 11-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU JUL 3         FAIR.
OUTLOOK FOR FRI JUL 4         FAIR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          353 (FAIR).
OUTLOOK FOR THU JUL 3         363 (FAIR).
OUTLOOK FOR FRI JUL 4         336 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         NW 10-13 MPH.
TRANSPORT WINDS               NW 5-10 MPH.        W 11-14 MPH.
MIXING HEIGHT                 4000 FT MSL.        9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU JUL 3         GOOD.
OUTLOOK FOR FRI JUL 4         GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          355 (FAIR).
OUTLOOK FOR THU JUL 3         381 (FAIR).
OUTLOOK FOR FRI JUL 4         197 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 7-17 MPH.        W 13-18 MPH.
TRANSPORT WINDS               SW 10-18 MPH.       W 17-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR THU JUL 3         FAIR.
OUTLOOK FOR FRI JUL 4         GOOD.

VENTILATION INDEX (CATEGORY)  82 (POOR).          515 (FAIR).
OUTLOOK FOR THU JUL 3         466 (FAIR).
OUTLOOK FOR FRI JUL 4         448 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      450 (FAIR)
ELLENSBURG    735 (GOOD)
GOLDENDALE    446 (FAIR)
TRI-CITIES    472 (FAIR)
WALLA WALLA   520 (FAIR)
YAKIMA        457 (FAIR)
BEND          328 (FAIR)
PRINEVILLE    377 (FAIR)
ENTERPRISE    232 (POOR)
HERMISTON     650 (GOOD)
JOHN DAY      364 (FAIR)
LA GRANDE     391 (FAIR)
MADRAS        423 (FAIR)
MEACHAM       383 (FAIR)
PENDLETON     627 (GOOD)
REDMOND       473 (FAIR)
SENECA        416 (FAIR)
THE DALLES    599 (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.
$$