Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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308
AUUS46 KPDT 191339
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
538 AM PST THU JAN 19 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 2-5 MPH.          S 4-10 MPH.
TRANSPORT WINDS               S 3-7 MPH.          S 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI JAN 20        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          112 (POOR).
OUTLOOK FOR FRI JAN 20        58 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 2-5 MPH.          SE 3-6 MPH.
TRANSPORT WINDS               S 2-6 MPH.          SE 3-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI JAN 20        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          42 (POOR).
OUTLOOK FOR FRI JAN 20        57 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 5-15 MPH.         S 5-15 MPH.
TRANSPORT WINDS               S 10-15 MPH.        S 10-15 MPH.
MIXING HEIGHT                 4000 FT MSL.        5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI JAN 20        FAIR.

VENTILATION INDEX (CATEGORY)  112 (POOR).         237 (POOR).
OUTLOOK FOR FRI JAN 20        311 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       87 (POOR)
ELLENSBURG     40 (POOR)
GOLDENDALE     70 (POOR)
TRI-CITIES     60 (POOR)
WALLA WALLA   164 (POOR)
YAKIMA         31 (POOR)
BEND          520 (FAIR)
PRINEVILLE    299 (POOR)
ENTERPRISE    193 (POOR)
HERMISTON      43 (POOR)
JOHN DAY      273 (POOR)
LA GRANDE     213 (POOR)
MADRAS        240 (POOR)
MEACHAM       149 (POOR)
PENDLETON     259 (POOR)
REDMOND       291 (POOR)
SENECA        246 (POOR)
THE DALLES     25 (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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