303
AUUS46 KPDT 121159
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
359 AM PST WED FEB 12 2025

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E 3-6 MPH.          NE 5-10 MPH.
TRANSPORT WINDS               E 3-6 MPH.          NE 4-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU FEB 13        POOR.
OUTLOOK FOR FRI FEB 14        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          78 (POOR).
OUTLOOK FOR THU FEB 13        63 (POOR).
OUTLOOK FOR FRI FEB 14        87 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-5 MPH.         E 4-8 MPH.
TRANSPORT WINDS               N 2-5 MPH.          SE 3-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU FEB 13        POOR.
OUTLOOK FOR FRI FEB 14        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          83 (POOR).
OUTLOOK FOR THU FEB 13        124 (POOR).
OUTLOOK FOR FRI FEB 14        39 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NE 1-3 MPH.         S 5-10 MPH.
TRANSPORT WINDS               N 2-4 MPH.          S 7-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR THU FEB 13        GOOD.
OUTLOOK FOR FRI FEB 14        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          107 (POOR).
OUTLOOK FOR THU FEB 13        472 (FAIR).
OUTLOOK FOR FRI FEB 14        102 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 4-8 MPH.         NE 3-7 MPH.
TRANSPORT WINDS               SE 4-7 MPH.         NE 3-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU FEB 13        POOR.
OUTLOOK FOR FRI FEB 14        POOR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          44 (POOR).
OUTLOOK FOR THU FEB 13        96 (POOR).
OUTLOOK FOR FRI FEB 14        90 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      246 (POOR)
ELLENSBURG    120 (POOR)
GOLDENDALE    200 (POOR)
TRI-CITIES     75 (POOR)
WALLA WALLA    25 (POOR)
YAKIMA         72 (POOR)
BEND          101 (POOR)
PRINEVILLE    208 (POOR)
ENTERPRISE     65 (POOR)
HERMISTON     102 (POOR)
JOHN DAY      120 (POOR)
LA GRANDE     112 (POOR)
MADRAS         72 (POOR)
MEACHAM        87 (POOR)
PENDLETON      60 (POOR)
REDMOND       151 (POOR)
SENECA        120 (POOR)
THE DALLES    316 (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.
$$