Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 141308
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
508 AM PST THU DEC 14 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-3 MPH.         NW 3-5 MPH.
TRANSPORT WINDS               NW 1-3 MPH.         NW 3-5 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI DEC 15        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          29 (POOR).
OUTLOOK FOR FRI DEC 15        28 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 1-3 MPH.       N-NW 1-4 MPH.
TRANSPORT WINDS               W-NW 1-3 MPH.       N-NW 1-4 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI DEC 15        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          25 (POOR).
OUTLOOK FOR FRI DEC 15        25 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S-SE 1-6 MPH.       S 7-15 MPH.
TRANSPORT WINDS               S-SE 1-6 MPH.       S 7-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI DEC 15        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          52 (POOR).
OUTLOOK FOR FRI DEC 15        67 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       25 (POOR)
ELLENSBURG     25 (POOR)
GOLDENDALE     27 (POOR)
TRI-CITIES     26 (POOR)
WALLA WALLA    26 (POOR)
YAKIMA         25 (POOR)
BEND           25 (POOR)
PRINEVILLE     37 (POOR)
ENTERPRISE     25 (POOR)
HERMISTON      32 (POOR)
JOHN DAY       25 (POOR)
LA GRANDE      66 (POOR)
MADRAS         25 (POOR)
MEACHAM        26 (POOR)
PENDLETON      29 (POOR)
REDMOND        25 (POOR)
SENECA         25 (POOR)
THE DALLES     29 (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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