Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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319
AUUS46 KPDT 201345
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
545 AM PST FRI JAN 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                 E 4-8 MPH.          E 4-10 MPH.
TRANSPORT WINDS               E 4-10 MPH.         E 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       2000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT JAN 21        POOR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          76 (POOR).
OUTLOOK FOR SAT JAN 21        44 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NE 1-4 MPH.         NE 3-6 MPH.
TRANSPORT WINDS               NE 4-8 MPH.         NE 6-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       NEAR SURFACE.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SAT JAN 21        POOR.

VENTILATION INDEX (CATEGORY)  48 (POOR).          47 (POOR).
OUTLOOK FOR SAT JAN 21        25 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 8-18 MPH.         S 10-20 MPH.
TRANSPORT WINDS               S 15-23 MPH.        S 15-30 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR SAT JAN 21        POOR.

VENTILATION INDEX (CATEGORY)  169 (POOR).         507 (FAIR).
OUTLOOK FOR SAT JAN 21        239 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      127 (POOR)
ELLENSBURG     74 (POOR)
GOLDENDALE     58 (POOR)
TRI-CITIES     34 (POOR)
WALLA WALLA   136 (POOR)
YAKIMA         48 (POOR)
BEND          564 (FAIR)
PRINEVILLE    428 (FAIR)
ENTERPRISE    455 (FAIR)
HERMISTON      34 (POOR)
JOHN DAY      410 (FAIR)
LA GRANDE     558 (FAIR)
MADRAS        231 (POOR)
MEACHAM       398 (FAIR)
PENDLETON     188 (POOR)
REDMOND       374 (FAIR)
SENECA        417 (FAIR)
THE DALLES     67 (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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