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 111140
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
440 AM PDT THU APR 11 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-6 MPH.         W 6-11 MPH.
TRANSPORT WINDS               S 3-6 MPH.          SW 6-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI APR 12        FAIR.
OUTLOOK FOR SAT APR 13        FAIR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          221 (POOR).
OUTLOOK FOR FRI APR 12        142 (POOR).
OUTLOOK FOR SAT APR 13        166 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-4 MPH.         SW 6-11 MPH.
TRANSPORT WINDS               W 2-5 MPH.          SW 10-16 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI APR 12        POOR.
OUTLOOK FOR SAT APR 13        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          361 (FAIR).
OUTLOOK FOR FRI APR 12        184 (POOR).
OUTLOOK FOR SAT APR 13        143 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-6 MPH.         S 10-16 MPH.
TRANSPORT WINDS               S 6-11 MPH.         S 12-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI APR 12        FAIR.
OUTLOOK FOR SAT APR 13        FAIR.

VENTILATION INDEX (CATEGORY)  71 (POOR).          750 (GOOD).
OUTLOOK FOR FRI APR 12        211 (POOR).
OUTLOOK FOR SAT APR 13        177 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-6 MPH.         NW 4-7 MPH.
TRANSPORT WINDS               S 4-9 MPH.          W 5-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI APR 12        POOR.
OUTLOOK FOR SAT APR 13        FAIR.

VENTILATION INDEX (CATEGORY)  31 (POOR).          181 (POOR).
OUTLOOK FOR FRI APR 12        130 (POOR).
OUTLOOK FOR SAT APR 13        164 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      283 (POOR)
ELLENSBURG    352 (FAIR)
GOLDENDALE    427 (FAIR)
TRI-CITIES    295 (POOR)
WALLA WALLA   134 (POOR)
YAKIMA        355 (FAIR)
BEND          726 (GOOD)
PRINEVILLE    635 (GOOD)
ENTERPRISE    348 (FAIR)
HERMISTON     235 (POOR)
JOHN DAY     1022 (GOOD)
LA GRANDE     677 (GOOD)
MADRAS        528 (FAIR)
MEACHAM       248 (POOR)
PENDLETON     172 (POOR)
REDMOND       521 (FAIR)
SENECA       1050 (GOOD)
THE DALLES    373 (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.
$$
National Weather Service Weather Forecast Office
