Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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386
AUUS46 KPDT 181229
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
429 AM PST WED JAN 18 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 8-23 MPH.        S 14-28 MPH.
TRANSPORT WINDS               SE 9-24 MPH.        S 13-31 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR THU JAN 19        POOR.

VENTILATION INDEX (CATEGORY)  39 (POOR).          58 (POOR).
OUTLOOK FOR THU JAN 19        56 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 4-8 MPH.         SE 7-12 MPH.
TRANSPORT WINDS               SE 4-8 MPH.         E 3-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU JAN 19        POOR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          25 (POOR).
OUTLOOK FOR THU JAN 19        25 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 28-40 MPH.        S 26-38 MPH.
TRANSPORT WINDS               S 27-39 MPH.        S 20-29 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR THU JAN 19        POOR.

VENTILATION INDEX (CATEGORY)  242 (POOR).         233 (POOR).
OUTLOOK FOR THU JAN 19        55 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM       41 (POOR)
ELLENSBURG     33 (POOR)
GOLDENDALE     25 (POOR)
TRI-CITIES     25 (POOR)
WALLA WALLA   101 (POOR)
YAKIMA         25 (POOR)
BEND          301 (FAIR)
PRINEVILLE    135 (POOR)
ENTERPRISE    149 (POOR)
HERMISTON      25 (POOR)
JOHN DAY      104 (POOR)
LA GRANDE     269 (POOR)
MADRAS         97 (POOR)
MEACHAM       146 (POOR)
PENDLETON      73 (POOR)
REDMOND       151 (POOR)
SENECA        114 (POOR)
THE DALLES     26 (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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