Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 181303
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
503 AM PST THU JAN 18 2018

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S-SW 5-12 MPH.      SW 7-14 MPH.
TRANSPORT WINDS               S-SW 5-12 MPH.      W 15-24 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI JAN 19        FAIR.

VENTILATION INDEX (CATEGORY)  37 (POOR).          380 (FAIR).
OUTLOOK FOR FRI JAN 19        685 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-SW 4-9 MPH.       SW 9-16 MPH.
TRANSPORT WINDS               W-SW 4-9 MPH.       SW 23-32 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI JAN 19        POOR.

VENTILATION INDEX (CATEGORY)  30 (POOR).          619 (GOOD).
OUTLOOK FOR FRI JAN 19        259 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 16-22 MPH.        S 9-14 MPH.
TRANSPORT WINDS               S 16-22 MPH.        S 6-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           FAIR.               POOR.
OUTLOOK FOR FRI JAN 19        FAIR.

VENTILATION INDEX (CATEGORY)  118 (POOR).         95 (POOR).
OUTLOOK FOR FRI JAN 19        347 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      397 (FAIR)
ELLENSBURG     55 (POOR)
GOLDENDALE    428 (FAIR)
TRI-CITIES    259 (POOR)
WALLA WALLA   399 (FAIR)
YAKIMA        245 (POOR)
BEND          631 (GOOD)
PRINEVILLE    541 (FAIR)
ENTERPRISE     87 (POOR)
HERMISTON     255 (POOR)
JOHN DAY       79 (POOR)
LA GRANDE     108 (POOR)
MADRAS        759 (GOOD)
MEACHAM       172 (POOR)
PENDLETON     242 (POOR)
REDMOND       538 (FAIR)
SENECA         85 (POOR)
THE DALLES    274 (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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