891
AUUS46 KPDT 041143
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
343 AM PST TUE FEB 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                 NW 2-6 MPH.         N 7-13 MPH.
TRANSPORT WINDS               NW 5-9 MPH.         N 7-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED FEB 5         POOR.
OUTLOOK FOR THU FEB 6         POOR.

VENTILATION INDEX (CATEGORY)  42 (POOR).          111 (POOR).
OUTLOOK FOR WED FEB 5         71 (POOR).
OUTLOOK FOR THU FEB 6         85 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-4 MPH.         N 5-11 MPH.
TRANSPORT WINDS               N 4-9 MPH.          NE 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED FEB 5         POOR.
OUTLOOK FOR THU FEB 6         POOR.

VENTILATION INDEX (CATEGORY)  33 (POOR).          139 (POOR).
OUTLOOK FOR WED FEB 5         100 (POOR).
OUTLOOK FOR THU FEB 6         83 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-6 MPH.         W 3-5 MPH.
TRANSPORT WINDS               W 5-7 MPH.          NW 5-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED FEB 5         GOOD.
OUTLOOK FOR THU FEB 6         FAIR.

VENTILATION INDEX (CATEGORY)  36 (POOR).          62 (POOR).
OUTLOOK FOR WED FEB 5         308 (FAIR).
OUTLOOK FOR THU FEB 6         206 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 3-8 MPH.         NW 4-7 MPH.
TRANSPORT WINDS               W 5-10 MPH.         N 4-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED FEB 5         FAIR.
OUTLOOK FOR THU FEB 6         POOR.

VENTILATION INDEX (CATEGORY)  41 (POOR).          59 (POOR).
OUTLOOK FOR WED FEB 5         201 (POOR).
OUTLOOK FOR THU FEB 6         56 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      210 (POOR)
ELLENSBURG    113 (POOR)
GOLDENDALE    187 (POOR)
TRI-CITIES    168 (POOR)
WALLA WALLA    46 (POOR)
YAKIMA        118 (POOR)
BEND           55 (POOR)
PRINEVILLE     68 (POOR)
ENTERPRISE     60 (POOR)
HERMISTON     125 (POOR)
JOHN DAY      118 (POOR)
LA GRANDE      75 (POOR)
MADRAS        114 (POOR)
MEACHAM        49 (POOR)
PENDLETON      74 (POOR)
REDMOND        74 (POOR)
SENECA        121 (POOR)
THE DALLES    162 (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.
$$