Text Products for DDO Issued by PDT

Daily Dispersion Outlook
Issued by NWS Pendleton, OR
Versions: 1 2 3 4 5 6 7
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AUUS46 KPDT 181135
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
435 AM PDT THU APR 18 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E 4-8 MPH.          N 10-14 MPH.
TRANSPORT WINDS               SE 4-8 MPH.         NE 10-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI APR 19        GOOD.
OUTLOOK FOR SAT APR 20        FAIR.

VENTILATION INDEX (CATEGORY)  45 (POOR).          919 (GOOD).
OUTLOOK FOR FRI APR 19        739 (GOOD).
OUTLOOK FOR SAT APR 20        237 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-8 MPH.         NE 9-11 MPH.
TRANSPORT WINDS               N 3-7 MPH.          NE 9-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI APR 19        GOOD.
OUTLOOK FOR SAT APR 20        FAIR.

VENTILATION INDEX (CATEGORY)  50 (POOR).          867 (GOOD).
OUTLOOK FOR FRI APR 19        1041 (GOOD).
OUTLOOK FOR SAT APR 20        366 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NE 1-4 MPH.         N 3-6 MPH.
TRANSPORT WINDS               E 2-5 MPH.          SW 5-6 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI APR 19        GOOD.
OUTLOOK FOR SAT APR 20        GOOD.

VENTILATION INDEX (CATEGORY)  39 (POOR).          400 (FAIR).
OUTLOOK FOR FRI APR 19        392 (FAIR).
OUTLOOK FOR SAT APR 20        764 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 4-9 MPH.         N 7-13 MPH.
TRANSPORT WINDS               SE 6-11 MPH.        N 8-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI APR 19        FAIR.
OUTLOOK FOR SAT APR 20        FAIR.

VENTILATION INDEX (CATEGORY)  99 (POOR).          717 (GOOD).
OUTLOOK FOR FRI APR 19        533 (FAIR).
OUTLOOK FOR SAT APR 20        202 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      551 (FAIR)
ELLENSBURG    755 (GOOD)
GOLDENDALE   1050 (GOOD)
TRI-CITIES    883 (GOOD)
WALLA WALLA   689 (GOOD)
YAKIMA        875 (GOOD)
BEND          460 (FAIR)
PRINEVILLE    515 (FAIR)
ENTERPRISE    465 (FAIR)
HERMISTON     930 (GOOD)
JOHN DAY      469 (FAIR)
LA GRANDE     455 (FAIR)
MADRAS        611 (GOOD)
MEACHAM       584 (FAIR)
PENDLETON     911 (GOOD)
REDMOND       525 (FAIR)
SENECA        485 (FAIR)
THE DALLES   1024 (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/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.
$$
National Weather Service Weather Forecast Office
