Text Products for DDO Issued by PDT

Daily Dispersion Outlook
Issued by NWS Pendleton, OR
Versions: 1 2 3 4 5 6 7
000
AUUS46 KPDT 201054
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
354 AM PDT SAT APR 20 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-11 MPH.        NW 4-8 MPH.
TRANSPORT WINDS               NW 3-11 MPH.        W 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN APR 21        FAIR.
OUTLOOK FOR MON APR 22        FAIR.

VENTILATION INDEX (CATEGORY)  51 (POOR).          130 (POOR).
OUTLOOK FOR SUN APR 21        650 (GOOD).
OUTLOOK FOR MON APR 22        299 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 6-12 MPH.        SE 4-8 MPH.
TRANSPORT WINDS               NW 6-12 MPH.        S 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN APR 21        FAIR.
OUTLOOK FOR MON APR 22        FAIR.

VENTILATION INDEX (CATEGORY)  85 (POOR).          161 (POOR).
OUTLOOK FOR SUN APR 21        616 (GOOD).
OUTLOOK FOR MON APR 22        240 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-5 MPH.         S 12-19 MPH.
TRANSPORT WINDS               NW 2-5 MPH.         S 16-19 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN APR 21        FAIR.
OUTLOOK FOR MON APR 22        FAIR.

VENTILATION INDEX (CATEGORY)  45 (POOR).          720 (GOOD).
OUTLOOK FOR SUN APR 21        512 (FAIR).
OUTLOOK FOR MON APR 22        247 (POOR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 4-8 MPH.         N 3-8 MPH.
TRANSPORT WINDS               SE 4-8 MPH.         NW 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR SUN APR 21        FAIR.
OUTLOOK FOR MON APR 22        FAIR.

VENTILATION INDEX (CATEGORY)  30 (POOR).          124 (POOR).
OUTLOOK FOR SUN APR 21        604 (GOOD).
OUTLOOK FOR MON APR 22        276 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      614 (GOOD)
ELLENSBURG    501 (FAIR)
GOLDENDALE    246 (POOR)
TRI-CITIES    137 (POOR)
WALLA WALLA    83 (POOR)
YAKIMA        249 (POOR)
BEND          964 (GOOD)
PRINEVILLE    708 (GOOD)
ENTERPRISE    449 (FAIR)
HERMISTON     158 (POOR)
JOHN DAY      866 (GOOD)
LA GRANDE     707 (GOOD)
MADRAS        318 (FAIR)
MEACHAM       137 (POOR)
PENDLETON     151 (POOR)
REDMOND       566 (FAIR)
SENECA        882 (GOOD)
THE DALLES    246 (POOR)

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
