Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 211008
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
308 AM PDT FRI JUL 21 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 VRB 2-5 MPH.        W 5-10 MPH.
TRANSPORT WINDS               VRB 3-6 MPH.        W 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT JUL 22        FAIR.

VENTILATION INDEX (CATEGORY)  106 (POOR).         588 (FAIR).
OUTLOOK FOR SAT JUL 22        496 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-6 MPH.          SE 3-7 MPH.
TRANSPORT WINDS               W 4-7 MPH.          SW 5-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT JUL 22        FAIR.

VENTILATION INDEX (CATEGORY)  74 (POOR).          330 (FAIR).
OUTLOOK FOR SAT JUL 22        355 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 5-9 MPH.         NW 5-10 MPH.
TRANSPORT WINDS               NW 5-10 MPH.        W 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT JUL 22        GOOD.

VENTILATION INDEX (CATEGORY)  38 (POOR).          409 (FAIR).
OUTLOOK FOR SAT JUL 22        414 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      405 (FAIR)
ELLENSBURG    527 (FAIR)
GOLDENDALE    399 (FAIR)
TRI-CITIES    533 (FAIR)
WALLA WALLA   554 (FAIR)
YAKIMA        280 (POOR)
BEND          254 (POOR)
PRINEVILLE    337 (FAIR)
ENTERPRISE    570 (FAIR)
HERMISTON     665 (GOOD)
JOHN DAY      524 (FAIR)
LA GRANDE     407 (FAIR)
MADRAS        326 (FAIR)
MEACHAM       400 (FAIR)
PENDLETON     491 (FAIR)
REDMOND       317 (FAIR)
SENECA        593 (FAIR)
THE DALLES    524 (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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