107
AUUS46 KPDT 041145
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
345 AM PST SAT JAN 4 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 5-9 MPH.          SW 4-7 MPH.
TRANSPORT WINDS               S 5-9 MPH.          SW 6-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN JAN 5         FAIR.
OUTLOOK FOR MON JAN 6         POOR.

VENTILATION INDEX (CATEGORY)  34 (POOR).          61 (POOR).
OUTLOOK FOR SUN JAN 5         134 (POOR).
OUTLOOK FOR MON JAN 6         132 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-6 MPH.          SE 2-5 MPH.
TRANSPORT WINDS               W 2-6 MPH.          S 3-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN JAN 5         POOR.
OUTLOOK FOR MON JAN 6         POOR.

VENTILATION INDEX (CATEGORY)  29 (POOR).          30 (POOR).
OUTLOOK FOR SUN JAN 5         30 (POOR).
OUTLOOK FOR MON JAN 6         127 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 1-3 MPH.         S 2-4 MPH.
TRANSPORT WINDS               S 4-8 MPH.          S 5-9 MPH.
MIXING HEIGHT                 4000 FT MSL.        4500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN JAN 5         POOR.
OUTLOOK FOR MON JAN 6         FAIR.

VENTILATION INDEX (CATEGORY)  51 (POOR).          99 (POOR).
OUTLOOK FOR SUN JAN 5         105 (POOR).
OUTLOOK FOR MON JAN 6         153 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 4-8 MPH.          SW 4-9 MPH.
TRANSPORT WINDS               S 4-8 MPH.          SW 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN JAN 5         FAIR.
OUTLOOK FOR MON JAN 6         POOR.

VENTILATION INDEX (CATEGORY)  57 (POOR).          150 (POOR).
OUTLOOK FOR SUN JAN 5         190 (POOR).
OUTLOOK FOR MON JAN 6         95 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       43 (POOR)
ELLENSBURG     25 (POOR)
GOLDENDALE     50 (POOR)
TRI-CITIES     68 (POOR)
WALLA WALLA    81 (POOR)
YAKIMA         25 (POOR)
BEND          108 (POOR)
PRINEVILLE     98 (POOR)
ENTERPRISE     77 (POOR)
HERMISTON      26 (POOR)
JOHN DAY      177 (POOR)
LA GRANDE      92 (POOR)
MADRAS        118 (POOR)
MEACHAM       134 (POOR)
PENDLETON      80 (POOR)
REDMOND        76 (POOR)
SENECA        210 (POOR)
THE DALLES     27 (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.
$$