Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 241215
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
515 AM PDT THU MAY 24 2018

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 6-13 MPH.        SW 8-12 MPH.
TRANSPORT WINDS               SW 6-13 MPH.        SW 11-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 25        FAIR.

VENTILATION INDEX (CATEGORY)  204 (POOR).         751 (GOOD).
OUTLOOK FOR FRI MAY 25        394 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 4-8 MPH.       W-SW 5-9 MPH.
TRANSPORT WINDS               W-NW 4-8 MPH.       SW 9-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 25        FAIR.

VENTILATION INDEX (CATEGORY)  77 (POOR).          583 (FAIR).
OUTLOOK FOR FRI MAY 25        308 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 2-5 MPH.       W 3-6 MPH.
TRANSPORT WINDS               W-NW 2-5 MPH.       W 5-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 25        FAIR.

VENTILATION INDEX (CATEGORY)  59 (POOR).          389 (FAIR).
OUTLOOK FOR FRI MAY 25        351 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      399 (FAIR)
ELLENSBURG    701 (GOOD)
GOLDENDALE    536 (FAIR)
TRI-CITIES    788 (GOOD)
WALLA WALLA   673 (GOOD)
YAKIMA        486 (FAIR)
BEND          386 (FAIR)
PRINEVILLE    387 (FAIR)
ENTERPRISE    243 (POOR)
HERMISTON     855 (GOOD)
JOHN DAY      306 (FAIR)
LA GRANDE     364 (FAIR)
MADRAS        386 (FAIR)
MEACHAM       397 (FAIR)
PENDLETON     576 (FAIR)
REDMOND       345 (FAIR)
SENECA        285 (POOR)
THE DALLES    589 (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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