Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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558
AUUS46 KPDT 230928
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
228 AM PDT SAT SEP 23 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-6 MPH.         NW 2-6 MPH.
TRANSPORT WINDS               S 4-8 MPH.          NW 3-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN SEP 24        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          254 (POOR).
OUTLOOK FOR SUN SEP 24        288 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-6 MPH.          S 2-6 MPH.
TRANSPORT WINDS               W 4-8 MPH.          S 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN SEP 24        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          308 (FAIR).
OUTLOOK FOR SUN SEP 24        251 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 1-5 MPH.         N 5-9 MPH.
TRANSPORT WINDS               S 2-5 MPH.          N 7-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN SEP 24        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          544 (FAIR).
OUTLOOK FOR SUN SEP 24        620 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      223 (POOR)
ELLENSBURG    318 (FAIR)
GOLDENDALE    291 (POOR)
TRI-CITIES    368 (FAIR)
WALLA WALLA   331 (FAIR)
YAKIMA        217 (POOR)
BEND          326 (FAIR)
PRINEVILLE    362 (FAIR)
ENTERPRISE    523 (FAIR)
HERMISTON     302 (FAIR)
JOHN DAY      460 (FAIR)
LA GRANDE     533 (FAIR)
MADRAS        278 (POOR)
MEACHAM       410 (FAIR)
PENDLETON     219 (POOR)
REDMOND       311 (FAIR)
SENECA        519 (FAIR)
THE DALLES    384 (FAIR)

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/FORECAST/FWXGRAPHICALVENTILATION.PHP?WFO=PDT

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



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