Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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723
AUUS46 KPDT 011107
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
407 AM PDT SUN MAY 1 2016

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E 3-7 MPH.          NE 9-13 MPH.
TRANSPORT WINDS               E 3-7 MPH.          NE 7-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON MAY 2         GOOD.

VENTILATION INDEX (CATEGORY)  35 (POOR).          489 (FAIR).
OUTLOOK FOR MON MAY 2         495 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 7-9 MPH.         NE 10-13 MPH.
TRANSPORT WINDS               NW 7-9 MPH.         E 12-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON MAY 2         FAIR.

VENTILATION INDEX (CATEGORY)  58 (POOR).          1008 (GOOD).
OUTLOOK FOR MON MAY 2         529 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW-N 4-8 MPH.       NE 7-9 MPH.
TRANSPORT WINDS               NW-N 4-8 MPH.       E 4-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON MAY 2         GOOD.

VENTILATION INDEX (CATEGORY)  43 (POOR).          244 (POOR).
OUTLOOK FOR MON MAY 2         605 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      880 (GOOD)
ELLENSBURG   1025 (GOOD)
GOLDENDALE   1050 (GOOD)
TRI-CITIES    734 (GOOD)
WALLA WALLA   323 (FAIR)
YAKIMA       1050 (GOOD)
BEND          666 (GOOD)
PRINEVILLE    685 (GOOD)
ENTERPRISE    306 (FAIR)
HERMISTON     539 (FAIR)
JOHN DAY      548 (FAIR)
LA GRANDE     277 (POOR)
MADRAS        715 (GOOD)
MEACHAM       360 (FAIR)
PENDLETON     314 (FAIR)
REDMOND       568 (FAIR)
SENECA        647 (GOOD)
THE DALLES    861 (GOOD)

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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