Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 231211
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
411 AM PST TUE JAN 23 2018

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 4-8 MPH.         SE 6-16 MPH.
TRANSPORT WINDS               SE 4-8 MPH.         SE 6-21 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED JAN 24        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          95 (POOR).
OUTLOOK FOR WED JAN 24        252 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-3 MPH.         SE 2-6 MPH.
TRANSPORT WINDS               NW 2-3 MPH.         SE 6-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED JAN 24        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          51 (POOR).
OUTLOOK FOR WED JAN 24        202 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 8-12 MPH.         S 22-28 MPH.
TRANSPORT WINDS               S 8-12 MPH.         S 17-21 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED JAN 24        FAIR.

VENTILATION INDEX (CATEGORY)  66 (POOR).          218 (POOR).
OUTLOOK FOR WED JAN 24        248 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       69 (POOR)
ELLENSBURG     59 (POOR)
GOLDENDALE     44 (POOR)
TRI-CITIES     25 (POOR)
WALLA WALLA   157 (POOR)
YAKIMA         65 (POOR)
BEND          186 (POOR)
PRINEVILLE    164 (POOR)
ENTERPRISE    212 (POOR)
HERMISTON      25 (POOR)
JOHN DAY      104 (POOR)
LA GRANDE     228 (POOR)
MADRAS        195 (POOR)
MEACHAM       165 (POOR)
PENDLETON     142 (POOR)
REDMOND       228 (POOR)
SENECA        114 (POOR)
THE DALLES     33 (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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