Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 251327
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
527 AM PST SAT FEB 25 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 2-5 MPH.          SW-W 7-11 MPH.
TRANSPORT WINDS               S 2-5 MPH.          SW 11-16 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN FEB 26        FAIR.

VENTILATION INDEX (CATEGORY)  33 (POOR).          405 (FAIR).
OUTLOOK FOR SUN FEB 26        592 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 2-7 MPH.       S-SW 4-6 MPH.
TRANSPORT WINDS               W-NW 2-5 MPH.       SW 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN FEB 26        FAIR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          147 (POOR).
OUTLOOK FOR SUN FEB 26        298 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S-SW 2-4 MPH.       S-SW 5-9 MPH.
TRANSPORT WINDS               S-SW 2-4 MPH.       W 10-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN FEB 26        FAIR.

VENTILATION INDEX (CATEGORY)  48 (POOR).          496 (FAIR).
OUTLOOK FOR SUN FEB 26        378 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      558 (FAIR)
ELLENSBURG    600 (FAIR)
GOLDENDALE    175 (POOR)
TRI-CITIES    357 (FAIR)
WALLA WALLA   446 (FAIR)
YAKIMA         54 (POOR)
BEND          251 (POOR)
PRINEVILLE    244 (POOR)
ENTERPRISE    622 (GOOD)
HERMISTON     345 (FAIR)
JOHN DAY      514 (FAIR)
LA GRANDE     497 (FAIR)
MADRAS        331 (FAIR)
MEACHAM       511 (FAIR)
PENDLETON     447 (FAIR)
REDMOND       225 (POOR)
SENECA        479 (FAIR)
THE DALLES     77 (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/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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