Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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AUUS46 KPDT 131035
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
335 AM PDT SAT APR 13 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-6 MPH.         N 7-12 MPH.
TRANSPORT WINDS               SE 2-6 MPH.         NE 9-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN APR 14        FAIR.
OUTLOOK FOR MON APR 15        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          216 (POOR).
OUTLOOK FOR SUN APR 14        267 (POOR).
OUTLOOK FOR MON APR 15        941 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-5 MPH.         E 4-7 MPH.
TRANSPORT WINDS               NW 2-5 MPH.         NE 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN APR 14        FAIR.
OUTLOOK FOR MON APR 15        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          141 (POOR).
OUTLOOK FOR SUN APR 14        283 (POOR).
OUTLOOK FOR MON APR 15        573 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 N 1-4 MPH.          N 7-9 MPH.
TRANSPORT WINDS               N 1-4 MPH.          NE 9-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN APR 14        FAIR.
OUTLOOK FOR MON APR 15        GOOD.

VENTILATION INDEX (CATEGORY)  27 (POOR).          233 (POOR).
OUTLOOK FOR SUN APR 14        458 (FAIR).
OUTLOOK FOR MON APR 15        531 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 1-4 MPH.         N 7-12 MPH.
TRANSPORT WINDS               SE 1-4 MPH.         NE 9-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN APR 14        FAIR.
OUTLOOK FOR MON APR 15        GOOD.

VENTILATION INDEX (CATEGORY)  26 (POOR).          203 (POOR).
OUTLOOK FOR SUN APR 14        178 (POOR).
OUTLOOK FOR MON APR 15        841 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      104 (POOR)
ELLENSBURG     88 (POOR)
GOLDENDALE    194 (POOR)
TRI-CITIES    183 (POOR)
WALLA WALLA   164 (POOR)
YAKIMA        132 (POOR)
BEND          411 (FAIR)
PRINEVILLE    517 (FAIR)
ENTERPRISE    243 (POOR)
HERMISTON     229 (POOR)
JOHN DAY      909 (GOOD)
LA GRANDE     219 (POOR)
MADRAS        426 (FAIR)
MEACHAM       200 (POOR)
PENDLETON     237 (POOR)
REDMOND       443 (FAIR)
SENECA       1050 (GOOD)
THE DALLES    141 (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.

$$


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