Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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724
AUUS46 KPDT 201212
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
412 AM PST MON FEB 20 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-7 MPH.         SW 10-15 MPH.
TRANSPORT WINDS               SE 3-7 MPH.         SW 35-45 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE FEB 21        GOOD.

VENTILATION INDEX (CATEGORY)  164 (POOR).         531 (FAIR).
OUTLOOK FOR TUE FEB 21        464 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-7 MPH.          SE 5-10 MPH.
TRANSPORT WINDS               W 3-7 MPH.          SW 30-40 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE FEB 21        GOOD.

VENTILATION INDEX (CATEGORY)  33 (POOR).          176 (POOR).
OUTLOOK FOR TUE FEB 21        278 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 8-15 MPH.         S 15-25 MPH.
TRANSPORT WINDS               S 8-15 MPH.         SW 45-55 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE FEB 21        POOR.

VENTILATION INDEX (CATEGORY)  244 (POOR).         612 (GOOD).
OUTLOOK FOR TUE FEB 21        224 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       25 (POOR)
ELLENSBURG     41 (POOR)
GOLDENDALE    309 (FAIR)
TRI-CITIES    249 (POOR)
WALLA WALLA   818 (GOOD)
YAKIMA         86 (POOR)
BEND         1050 (GOOD)
PRINEVILLE    930 (GOOD)
ENTERPRISE    644 (GOOD)
HERMISTON     326 (FAIR)
JOHN DAY      667 (GOOD)
LA GRANDE     613 (GOOD)
MADRAS       1042 (GOOD)
MEACHAM       546 (FAIR)
PENDLETON     671 (GOOD)
REDMOND      1041 (GOOD)
SENECA        702 (GOOD)
THE DALLES    349 (FAIR)

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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