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Daily Dispersion Outlook
Issued by NWS Pendleton, OR

000
AUUS46 KPDT 231100
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PDT THU MAY 23 2013

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-6 MPH.         N 3-7 MPH.
TRANSPORT WINDS               SE 2-6 MPH.         SW 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       11500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI MAY 24        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          374 (FAIR).
OUTLOOK FOR FRI MAY 24        890 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 0-4 MPH.          SE 5-10 MPH.
TRANSPORT WINDS               SE 1-5 MPH.         SW 10-15 MPH.
MIXING HEIGHT                 2000 FT MSL.        9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI MAY 24        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          690 (GOOD).
OUTLOOK FOR FRI MAY 24        548 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-5 MPH.         NE 3-7 MPH.
TRANSPORT WINDS               NW 1-5 MPH.         SW 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       13000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI MAY 24        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          174 (POOR).
OUTLOOK FOR FRI MAY 24        294 (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.

$$