808
AUUS46 KPDT 311123
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
323 AM PST FRI JAN 31 2025

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 5-10 MPH.        S 10-20 MPH.
TRANSPORT WINDS               E 5-10 MPH.         S 12-21 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT FEB 1         GOOD.
OUTLOOK FOR SUN FEB 2         FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          37 (POOR).
OUTLOOK FOR SAT FEB 1         572 (FAIR).
OUTLOOK FOR SUN FEB 2         319 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-5 MPH.         S 7-12 MPH.
TRANSPORT WINDS               E 4-6 MPH.          S 7-18 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT FEB 1         GOOD.
OUTLOOK FOR SUN FEB 2         POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          53 (POOR).
OUTLOOK FOR SAT FEB 1         419 (FAIR).
OUTLOOK FOR SUN FEB 2         144 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 15-25 MPH.        S 20-30 MPH.
TRANSPORT WINDS               S 12-20 MPH.        S 15-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT FEB 1         FAIR.
OUTLOOK FOR SUN FEB 2         FAIR.

VENTILATION INDEX (CATEGORY)  58 (POOR).          119 (POOR).
OUTLOOK FOR SAT FEB 1         210 (POOR).
OUTLOOK FOR SUN FEB 2         240 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 10-15 MPH.        S 15-25 MPH.
TRANSPORT WINDS               SE 7-13 MPH.        S 15-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT FEB 1         GOOD.
OUTLOOK FOR SUN FEB 2         FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          57 (POOR).
OUTLOOK FOR SAT FEB 1         487 (FAIR).
OUTLOOK FOR SUN FEB 2         465 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       26 (POOR)
ELLENSBURG     25 (POOR)
GOLDENDALE     25 (POOR)
TRI-CITIES     25 (POOR)
WALLA WALLA    48 (POOR)
YAKIMA         31 (POOR)
BEND          124 (POOR)
PRINEVILLE    112 (POOR)
ENTERPRISE     91 (POOR)
HERMISTON      25 (POOR)
JOHN DAY       95 (POOR)
LA GRANDE     126 (POOR)
MADRAS        164 (POOR)
MEACHAM        45 (POOR)
PENDLETON      52 (POOR)
REDMOND       123 (POOR)
SENECA        105 (POOR)
THE DALLES     25 (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.
$$