534
AUUS46 KPDT 231214
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
414 AM PST SUN FEB 23 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 14-27 MPH.        SW 18-27 MPH.
TRANSPORT WINDS               S 14-27 MPH.        SW 15-23 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR MON FEB 24        FAIR.
OUTLOOK FOR TUE FEB 25        GOOD.

VENTILATION INDEX (CATEGORY)  42 (POOR).          88 (POOR).
OUTLOOK FOR MON FEB 24        125 (POOR).
OUTLOOK FOR TUE FEB 25        1049 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 4-12 MPH.        SW 13-22 MPH.
TRANSPORT WINDS               SW 4-12 MPH.        SW 10-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR MON FEB 24        POOR.
OUTLOOK FOR TUE FEB 25        GOOD.

VENTILATION INDEX (CATEGORY)  27 (POOR).          56 (POOR).
OUTLOOK FOR MON FEB 24        33 (POOR).
OUTLOOK FOR TUE FEB 25        756 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 23-34 MPH.        S 19-27 MPH.
TRANSPORT WINDS               S 20-30 MPH.        S 18-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR MON FEB 24        FAIR.
OUTLOOK FOR TUE FEB 25        GOOD.

VENTILATION INDEX (CATEGORY)  124 (POOR).         120 (POOR).
OUTLOOK FOR MON FEB 24        236 (POOR).
OUTLOOK FOR TUE FEB 25        847 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 21-35 MPH.        S 19-28 MPH.
TRANSPORT WINDS               SW 19-30 MPH.       SW 17-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR MON FEB 24        GOOD.
OUTLOOK FOR TUE FEB 25        GOOD.

VENTILATION INDEX (CATEGORY)  88 (POOR).          116 (POOR).
OUTLOOK FOR MON FEB 24        215 (POOR).
OUTLOOK FOR TUE FEB 25        1043 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       32 (POOR)
ELLENSBURG     25 (POOR)
GOLDENDALE     62 (POOR)
TRI-CITIES     84 (POOR)
WALLA WALLA    70 (POOR)
YAKIMA         25 (POOR)
BEND          467 (FAIR)
PRINEVILLE    535 (FAIR)
ENTERPRISE     95 (POOR)
HERMISTON      51 (POOR)
JOHN DAY      136 (POOR)
LA GRANDE      97 (POOR)
MADRAS        559 (FAIR)
MEACHAM        82 (POOR)
PENDLETON     102 (POOR)
REDMOND       652 (GOOD)
SENECA        245 (POOR)
THE DALLES     38 (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:
HTTPS://WWW.WEATHER.GOV/PDT/DSSBRIEFING

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