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 231114
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
414 AM PDT TUE APR 23 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 3-7 MPH.          N 4-8 MPH.
TRANSPORT WINDS               NE 4-8 MPH.         N 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED APR 24        FAIR.
OUTLOOK FOR THU APR 25        FAIR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          169 (POOR).
OUTLOOK FOR WED APR 24        598 (FAIR).
OUTLOOK FOR THU APR 25        723 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         E 3-6 MPH.
TRANSPORT WINDS               N 4-8 MPH.          SE 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED APR 24        FAIR.
OUTLOOK FOR THU APR 25        FAIR.

VENTILATION INDEX (CATEGORY)  30 (POOR).          160 (POOR).
OUTLOOK FOR WED APR 24        435 (FAIR).
OUTLOOK FOR THU APR 25        529 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 N 2-4 MPH.          SE 3-6 MPH.
TRANSPORT WINDS               NE 3-6 MPH.         SW 4-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED APR 24        FAIR.
OUTLOOK FOR THU APR 25        FAIR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          235 (POOR).
OUTLOOK FOR WED APR 24        355 (FAIR).
OUTLOOK FOR THU APR 25        455 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-5 MPH.         N 3-8 MPH.
TRANSPORT WINDS               SE 5-10 MPH.        NW 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR WED APR 24        FAIR.
OUTLOOK FOR THU APR 25        FAIR.

VENTILATION INDEX (CATEGORY)  28 (POOR).          159 (POOR).
OUTLOOK FOR WED APR 24        550 (FAIR).
OUTLOOK FOR THU APR 25        579 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      342 (FAIR)
ELLENSBURG    251 (POOR)
GOLDENDALE    213 (POOR)
TRI-CITIES    180 (POOR)
WALLA WALLA    97 (POOR)
YAKIMA        181 (POOR)
BEND          205 (POOR)
PRINEVILLE    216 (POOR)
ENTERPRISE    262 (POOR)
HERMISTON     198 (POOR)
JOHN DAY      443 (FAIR)
LA GRANDE     218 (POOR)
MADRAS        140 (POOR)
MEACHAM       174 (POOR)
PENDLETON     173 (POOR)
REDMOND       191 (POOR)
SENECA        545 (FAIR)
THE DALLES    203 (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 National Headquarters
