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Daily Dispersion Outlook
Issued by NWS Pendleton, OR

000
AUUS46 KPDT 251055
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
355 AM PDT SAT MAY 25 2013

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-10 MPH.        SW 8-13 MPH.
TRANSPORT WINDS               SW 5-10 MPH.        SW 8-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN MAY 26        FAIR.

VENTILATION INDEX (CATEGORY)  64 (POOR).          763 (GOOD).
OUTLOOK FOR SUN MAY 26        451 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 4-8 MPH.          W 7-10 MPH.
TRANSPORT WINDS               W 4-8 MPH.          SW 4-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN MAY 26        FAIR.

VENTILATION INDEX (CATEGORY)  43 (POOR).          398 (FAIR).
OUTLOOK FOR SUN MAY 26        583 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 VRB 1-4 MPH.        NW 4-8 MPH.
TRANSPORT WINDS               VRB 1-4 MPH.        SW 5-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 26        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          339 (FAIR).
OUTLOOK FOR SUN MAY 26        242 (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.

$$