Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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340
AUUS46 KPDT 131318
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
518 AM PST WED DEC 13 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.         NE 2-3 MPH.
TRANSPORT WINDS               NW 1-3 MPH.         NW 1-3 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU DEC 14        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          26 (POOR).
OUTLOOK FOR THU DEC 14        29 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-4 MPH.         NE 1-3 MPH.
TRANSPORT WINDS               NW 1-4 MPH.         NW 1-4 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU DEC 14        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          28 (POOR).
OUTLOOK FOR THU DEC 14        27 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S-SE 2-8 MPH.       NW 5-11 MPH.
TRANSPORT WINDS               S-SE 2-8 MPH.       N 2-5 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU DEC 14        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          25 (POOR).
OUTLOOK FOR THU DEC 14        38 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       25 (POOR)
ELLENSBURG     25 (POOR)
GOLDENDALE     25 (POOR)
TRI-CITIES     30 (POOR)
WALLA WALLA    25 (POOR)
YAKIMA         25 (POOR)
BEND           25 (POOR)
PRINEVILLE     25 (POOR)
ENTERPRISE     25 (POOR)
HERMISTON      26 (POOR)
JOHN DAY       25 (POOR)
LA GRANDE      25 (POOR)
MADRAS         26 (POOR)
MEACHAM        25 (POOR)
PENDLETON      25 (POOR)
REDMOND        25 (POOR)
SENECA         25 (POOR)
THE DALLES     30 (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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