Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 221200
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PST MON DEC 22 2014

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 6-12 MPH.        W 7-13 MPH.
TRANSPORT WINDS               SW 6-12 MPH.        NW 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE DEC 23        POOR.

VENTILATION INDEX (CATEGORY)  35 (POOR).          369 (FAIR).
OUTLOOK FOR TUE DEC 23        36 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-5 MPH.         NW 5-10 MPH.
TRANSPORT WINDS               NW 1-5 MPH.         NW 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE DEC 23        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          123 (POOR).
OUTLOOK FOR TUE DEC 23        25 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         NW 5-10 MPH.
TRANSPORT WINDS               NW 3-7 MPH.         NW 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE DEC 23        POOR.

VENTILATION INDEX (CATEGORY)  30 (POOR).          387 (FAIR).
OUTLOOK FOR TUE DEC 23        65 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      113 (POOR)
ELLENSBURG    150 (POOR)
GOLDENDALE     71 (POOR)
TRI-CITIES    312 (FAIR)
WALLA WALLA   290 (POOR)
YAKIMA        105 (POOR)
BEND           99 (POOR)
PRINEVILLE     95 (POOR)
ENTERPRISE    315 (FAIR)
HERMISTON     235 (POOR)
JOHN DAY      178 (POOR)
LA GRANDE     400 (FAIR)
MADRAS         55 (POOR)
MEACHAM       358 (FAIR)
PENDLETON     421 (FAIR)
REDMOND        79 (POOR)
SENECA        157 (POOR)
THE DALLES     70 (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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