Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 251151
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
351 AM PST SUN FEB 25 2018

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 10-20 MPH.       W 15-30 MPH.
TRANSPORT WINDS               SW 15-25 MPH.       W 20-40 MPH.
MIXING HEIGHT                 2500 FT MSL.        5500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR MON FEB 26        FAIR.

VENTILATION INDEX (CATEGORY)  480 (FAIR).         1049 (GOOD).
OUTLOOK FOR MON FEB 26        397 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-10 MPH.        W 15-25 MPH.
TRANSPORT WINDS               SW 10-15 MPH.       W 20-35 MPH.
MIXING HEIGHT                 2500 FT MSL.        7500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR MON FEB 26        POOR.

VENTILATION INDEX (CATEGORY)  299 (POOR).         1050 (GOOD).
OUTLOOK FOR MON FEB 26        212 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 5-10 MPH.         SW 10-20 MPH.
TRANSPORT WINDS               S 10-15 MPH.        SW 15-30 MPH.
MIXING HEIGHT                 5000 FT MSL.        5500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR MON FEB 26        GOOD.

VENTILATION INDEX (CATEGORY)  286 (POOR).         442 (FAIR).
OUTLOOK FOR MON FEB 26        498 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM     1050 (GOOD)
ELLENSBURG   1050 (GOOD)
GOLDENDALE    891 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1050 (GOOD)
YAKIMA       1050 (GOOD)
BEND          923 (GOOD)
PRINEVILLE   1042 (GOOD)
ENTERPRISE    527 (FAIR)
HERMISTON    1050 (GOOD)
JOHN DAY      553 (FAIR)
LA GRANDE     457 (FAIR)
MADRAS       1050 (GOOD)
MEACHAM       796 (GOOD)
PENDLETON    1050 (GOOD)
REDMOND      1050 (GOOD)
SENECA        823 (GOOD)
THE DALLES    739 (GOOD)

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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