362
AUUS46 KPDT 021135
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
335 AM PST THU JAN 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                 NE 2-4 MPH.         N 4-8 MPH.
TRANSPORT WINDS               N 2-4 MPH.          NE 4-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI JAN 3         POOR.
OUTLOOK FOR SAT JAN 4         FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          40 (POOR).
OUTLOOK FOR FRI JAN 3         61 (POOR).
OUTLOOK FOR SAT JAN 4         74 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E 1-3 MPH.          NW 2-5 MPH.
TRANSPORT WINDS               E 1-3 MPH.          NE 2-5 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI JAN 3         POOR.
OUTLOOK FOR SAT JAN 4         POOR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          31 (POOR).
OUTLOOK FOR FRI JAN 3         57 (POOR).
OUTLOOK FOR SAT JAN 4         36 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 6-11 MPH.         S 9-15 MPH.
TRANSPORT WINDS               S 8-11 MPH.         S 14-17 MPH.
MIXING HEIGHT                 4000 FT MSL.        4500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI JAN 3         FAIR.
OUTLOOK FOR SAT JAN 4         FAIR.

VENTILATION INDEX (CATEGORY)  83 (POOR).          197 (POOR).
OUTLOOK FOR FRI JAN 3         291 (POOR).
OUTLOOK FOR SAT JAN 4         129 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 2-5 MPH.          NW 3-6 MPH.
TRANSPORT WINDS               SW 3-7 MPH.         S 4-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI JAN 3         POOR.
OUTLOOK FOR SAT JAN 4         FAIR.

VENTILATION INDEX (CATEGORY)  32 (POOR).          58 (POOR).
OUTLOOK FOR FRI JAN 3         57 (POOR).
OUTLOOK FOR SAT JAN 4         159 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      149 (POOR)
ELLENSBURG     49 (POOR)
GOLDENDALE     48 (POOR)
TRI-CITIES     47 (POOR)
WALLA WALLA    32 (POOR)
YAKIMA         25 (POOR)
BEND           54 (POOR)
PRINEVILLE     43 (POOR)
ENTERPRISE     88 (POOR)
HERMISTON      46 (POOR)
JOHN DAY      106 (POOR)
LA GRANDE     155 (POOR)
MADRAS         25 (POOR)
MEACHAM        76 (POOR)
PENDLETON      28 (POOR)
REDMOND        41 (POOR)
SENECA         80 (POOR)
THE DALLES     64 (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:
HTTP://WWW.WRH.NOAA.GOV/PDT/GFORECAST/GINDEX.PHP?FCST=MIXHGT,VENTCAT,TRANSWIND,VENTINDX&VT=0,72

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
$$