Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 221204
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
504 AM PDT FRI MAY 22 2015

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 8-11 MPH.        SW-W 7-13 MPH.
TRANSPORT WINDS               SW 9-12 MPH.        SW-NW 4-8 MPH.
MIXING HEIGHT                 2000 FT MSL.        8500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT MAY 23        POOR.

VENTILATION INDEX (CATEGORY)  64 (POOR).          359 (FAIR).
OUTLOOK FOR SAT MAY 23        247 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-5 MPH.          SW-W 5-6 MPH.
TRANSPORT WINDS               W 3-6 MPH.          W-NW 5-6 MPH.
MIXING HEIGHT                 2000 FT MSL.        10000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT MAY 23        FAIR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          317 (FAIR).
OUTLOOK FOR SAT MAY 23        584 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-5 MPH.         NW 10-14 MPH.
TRANSPORT WINDS               NW 4-6 MPH.         N 9-11 MPH.
MIXING HEIGHT                 4000 FT MSL.        7000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT MAY 23        GOOD.

VENTILATION INDEX (CATEGORY)  39 (POOR).          326 (FAIR).
OUTLOOK FOR SAT MAY 23        344 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      289 (POOR)
ELLENSBURG    253 (POOR)
GOLDENDALE    305 (FAIR)
TRI-CITIES    307 (FAIR)
WALLA WALLA   306 (FAIR)
YAKIMA        349 (FAIR)
BEND          542 (FAIR)
PRINEVILLE    442 (FAIR)
ENTERPRISE    360 (FAIR)
HERMISTON     521 (FAIR)
JOHN DAY      349 (FAIR)
LA GRANDE     341 (FAIR)
MADRAS        449 (FAIR)
MEACHAM       158 (POOR)
PENDLETON     341 (FAIR)
REDMOND       522 (FAIR)
SENECA        330 (FAIR)
THE DALLES    498 (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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