Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 231133
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
433 AM PDT SAT MAY 23 2015

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW-W 12-17 MPH.     W-NW 7-12 MPH.
TRANSPORT WINDS               SW-W 12-16 MPH.     NW-N 4-7 MPH.
MIXING HEIGHT                 2000 FT MSL.        8000 FT MSL.
DISPERSION CATEGORY           FAIR.               POOR.
OUTLOOK FOR SUN MAY 24        POOR.

VENTILATION INDEX (CATEGORY)  117 (POOR).         236 (POOR).
OUTLOOK FOR SUN MAY 24        321 (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.       NE 6-8 MPH.
TRANSPORT WINDS               W-NW 4-8 MPH.       N-NE 7-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 24        FAIR.

VENTILATION INDEX (CATEGORY)  37 (POOR).          476 (FAIR).
OUTLOOK FOR SUN MAY 24        231 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 10-17 MPH.       NW 14-18 MPH.
TRANSPORT WINDS               NW 12-17 MPH.       N 11-16 MPH.
MIXING HEIGHT                 4000 FT MSL.        8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN MAY 24        GOOD.

VENTILATION INDEX (CATEGORY)  126 (POOR).         403 (FAIR).
OUTLOOK FOR SUN MAY 24        435 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      188 (POOR)
ELLENSBURG    393 (FAIR)
GOLDENDALE    206 (POOR)
TRI-CITIES     69 (POOR)
WALLA WALLA   246 (POOR)
YAKIMA        587 (FAIR)
BEND          408 (FAIR)
PRINEVILLE    341 (FAIR)
ENTERPRISE    329 (FAIR)
HERMISTON     333 (FAIR)
JOHN DAY      245 (POOR)
LA GRANDE     446 (FAIR)
MADRAS        289 (POOR)
MEACHAM       159 (POOR)
PENDLETON     273 (POOR)
REDMOND       368 (FAIR)
SENECA        272 (POOR)
THE DALLES    397 (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/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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