Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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678
AUUS46 KPDT 211301
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
501 AM PST SUN JAN 21 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 6-14 MPH.        SE-E 14-28 MPH.
TRANSPORT WINDS               SE 6-14 MPH.        S 23-32 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON JAN 22        GOOD.

VENTILATION INDEX (CATEGORY)  26 (POOR).          307 (FAIR).
OUTLOOK FOR MON JAN 22        614 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-6 MPH.         S 10-16 MPH.
TRANSPORT WINDS               SE 3-6 MPH.         S 18-27 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON JAN 22        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          161 (POOR).
OUTLOOK FOR MON JAN 22        139 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 5-18 MPH.         S 16-35 MPH.
TRANSPORT WINDS               S 7-14 MPH.         S 18-22 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON JAN 22        GOOD.

VENTILATION INDEX (CATEGORY)  60 (POOR).          241 (POOR).
OUTLOOK FOR MON JAN 22        534 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      108 (POOR)
ELLENSBURG    121 (POOR)
GOLDENDALE     88 (POOR)
TRI-CITIES     85 (POOR)
WALLA WALLA   429 (FAIR)
YAKIMA        156 (POOR)
BEND          467 (FAIR)
PRINEVILLE    590 (FAIR)
ENTERPRISE    295 (POOR)
HERMISTON      86 (POOR)
JOHN DAY      172 (POOR)
LA GRANDE     252 (POOR)
MADRAS        803 (GOOD)
MEACHAM       321 (FAIR)
PENDLETON     426 (FAIR)
REDMOND       676 (GOOD)
SENECA        192 (POOR)
THE DALLES     38 (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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