Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 270952
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
252 AM PDT SUN MAY 27 2018

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE-SW 6-12 MPH.     SW-W 7-13 MPH.
TRANSPORT WINDS               SE-SW 6-12 MPH.     NE 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON MAY 28        FAIR.

VENTILATION INDEX (CATEGORY)  82 (POOR).          142 (POOR).
OUTLOOK FOR MON MAY 28        393 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 10-18 MPH.       NW 5-10 MPH.
TRANSPORT WINDS               NW 10-18 MPH.       NW 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR MON MAY 28        FAIR.

VENTILATION INDEX (CATEGORY)  36 (POOR).          237 (POOR).
OUTLOOK FOR MON MAY 28        293 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 7-13 MPH.        NW 10-15 MPH.
TRANSPORT WINDS               NW 7-13 MPH.        NE 15-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON MAY 28        GOOD.

VENTILATION INDEX (CATEGORY)  32 (POOR).          362 (FAIR).
OUTLOOK FOR MON MAY 28        371 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      266 (POOR)
ELLENSBURG    336 (FAIR)
GOLDENDALE    187 (POOR)
TRI-CITIES    139 (POOR)
WALLA WALLA   103 (POOR)
YAKIMA        307 (FAIR)
BEND          415 (FAIR)
PRINEVILLE    370 (FAIR)
ENTERPRISE    404 (FAIR)
HERMISTON     163 (POOR)
JOHN DAY      316 (FAIR)
LA GRANDE     405 (FAIR)
MADRAS        321 (FAIR)
MEACHAM       180 (POOR)
PENDLETON     151 (POOR)
REDMOND       411 (FAIR)
SENECA        371 (FAIR)
THE DALLES    429 (FAIR)

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/GFORECAST/GINDEX.PHP?FCST=MIXHGT,VENTCAT,TRANSWIND,VENTINDX&VT=0,72

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.

$$



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