Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 251208
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
408 AM PST SAT NOV 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 4-9 MPH.          E 6-10 MPH.
TRANSPORT WINDS               SE 5-11 MPH.        N 8-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN NOV 26        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          37 (POOR).
OUTLOOK FOR SUN NOV 26        986 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 3-10 MPH.        W 5-9 MPH.
TRANSPORT WINDS               NW 3-7 MPH.         NE 7-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN NOV 26        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          50 (POOR).
OUTLOOK FOR SUN NOV 26        476 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 7-12 MPH.         S 20-26 MPH.
TRANSPORT WINDS               S 7-12 MPH.         S 19-23 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN NOV 26        GOOD.

VENTILATION INDEX (CATEGORY)  35 (POOR).          114 (POOR).
OUTLOOK FOR SUN NOV 26        1028 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       71 (POOR)
ELLENSBURG     33 (POOR)
GOLDENDALE     59 (POOR)
TRI-CITIES     47 (POOR)
WALLA WALLA    40 (POOR)
YAKIMA         42 (POOR)
BEND           51 (POOR)
PRINEVILLE     25 (POOR)
ENTERPRISE     69 (POOR)
HERMISTON      51 (POOR)
JOHN DAY       32 (POOR)
LA GRANDE     116 (POOR)
MADRAS         25 (POOR)
MEACHAM        65 (POOR)
PENDLETON      29 (POOR)
REDMOND        27 (POOR)
SENECA         34 (POOR)
THE DALLES     51 (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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