295
AUUS46 KPDT 191124
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
424 AM PDT MON MAY 19 2025
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS S 8-14 MPH. SW 12-20 MPH.
TRANSPORT WINDS SW 8-14 MPH. SW 14-22 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE MAY 20 GOOD.
OUTLOOK FOR WED MAY 21 FAIR.
VENTILATION INDEX (CATEGORY) 120 (POOR). 343 (FAIR).
OUTLOOK FOR TUE MAY 20 1038 (GOOD).
OUTLOOK FOR WED MAY 21 567 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS SE 3-7 MPH. W 10-18 MPH.
TRANSPORT WINDS S 3-7 MPH. W 12-20 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR TUE MAY 20 GOOD.
OUTLOOK FOR WED MAY 21 POOR.
VENTILATION INDEX (CATEGORY) 53 (POOR). 628 (GOOD).
OUTLOOK FOR TUE MAY 20 831 (GOOD).
OUTLOOK FOR WED MAY 21 227 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS S 5-8 MPH. S 5-10 MPH.
TRANSPORT WINDS S 4-8 MPH. S 7-12 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR TUE MAY 20 GOOD.
OUTLOOK FOR WED MAY 21 GOOD.
VENTILATION INDEX (CATEGORY) 83 (POOR). 248 (POOR).
OUTLOOK FOR TUE MAY 20 577 (FAIR).
OUTLOOK FOR WED MAY 21 414 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 8-14 MPH. SW 10-18 MPH.
TRANSPORT WINDS S 9-15 MPH. SW 12-18 MPH.
MIXING HEIGHT NEAR SURFACE. 2500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR TUE MAY 20 GOOD.
OUTLOOK FOR WED MAY 21 FAIR.
VENTILATION INDEX (CATEGORY) 146 (POOR). 284 (POOR).
OUTLOOK FOR TUE MAY 20 944 (GOOD).
OUTLOOK FOR WED MAY 21 534 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 200 (POOR)
ELLENSBURG 127 (POOR)
GOLDENDALE 452 (FAIR)
TRI-CITIES 433 (FAIR)
WALLA WALLA 322 (FAIR)
YAKIMA 401 (FAIR)
BEND 1047 (GOOD)
PRINEVILLE 775 (GOOD)
ENTERPRISE 267 (POOR)
HERMISTON 410 (FAIR)
JOHN DAY 309 (FAIR)
LA GRANDE 219 (POOR)
MADRAS 983 (GOOD)
MEACHAM 186 (POOR)
PENDLETON 263 (POOR)
REDMOND 944 (GOOD)
SENECA 479 (FAIR)
THE DALLES 408 (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:
HTTPS://WWW.WEATHER.GOV/PDT/DSSBRIEFING
IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
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