Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 190921
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
221 AM PDT SAT AUG 19 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW-NW 7-13 MPH.     SW-W 7-13 MPH.
TRANSPORT WINDS               SW-NW 7-13 MPH.     NW 7-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN AUG 20        POOR.

VENTILATION INDEX (CATEGORY)  93 (POOR).          561 (FAIR).
OUTLOOK FOR SUN AUG 20        308 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-7 MPH.          NW 5-10 MPH.
TRANSPORT WINDS               NW 3-7 MPH.         NW 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN AUG 20        POOR.

VENTILATION INDEX (CATEGORY)  75 (POOR).          511 (FAIR).
OUTLOOK FOR SUN AUG 20        285 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-6 MPH.          NW 5-10 MPH.
TRANSPORT WINDS               W 2-6 MPH.          NW 15-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN AUG 20        GOOD.

VENTILATION INDEX (CATEGORY)  76 (POOR).          533 (FAIR).
OUTLOOK FOR SUN AUG 20        392 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      447 (FAIR)
ELLENSBURG    697 (GOOD)
GOLDENDALE    101 (POOR)
TRI-CITIES    478 (FAIR)
WALLA WALLA   637 (GOOD)
YAKIMA        654 (GOOD)
BEND          501 (FAIR)
PRINEVILLE    536 (FAIR)
ENTERPRISE    554 (FAIR)
HERMISTON     479 (FAIR)
JOHN DAY      533 (FAIR)
LA GRANDE     563 (FAIR)
MADRAS        520 (FAIR)
MEACHAM       492 (FAIR)
PENDLETON     577 (FAIR)
REDMOND       606 (GOOD)
SENECA        485 (FAIR)
THE DALLES    385 (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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