Walla Walla WA Weather Forecast Walla Walla Current Weather

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.

.DAY ONE...TODAY AND TONIGHT

AIR STAGNATION ADVISORY
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN COLUMBIA RIVER
GORGE OF WASHINGTON, KITTITAS VALLEY, YAKIMA VALLEY, LOWER
COLUMBIA BASIN OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS
OF WASHINGTON, EASTERN COLUMBIA RIVER GORGE OF OREGON, NORTH
CENTRAL OREGON, CENTRAL OREGON, LOWER COLUMBIA BASIN OF
OREGON, GRANDE RONDE VALLEY, FOOTHILLS OF THE BLUE MOUNTAINS
OF OREGON, NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES,
JOHN DAY BASIN

SNOW
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN COLUMBIA RIVER
GORGE OF WASHINGTON, KITTITAS VALLEY, YAKIMA VALLEY, LOWER
COLUMBIA BASIN OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS
OF WASHINGTON, NORTHWEST BLUE MOUNTAINS, EASTERN COLUMBIA
RIVER GORGE OF OREGON, NORTH CENTRAL OREGON, CENTRAL OREGON,
LOWER COLUMBIA BASIN OF OREGON, GRANDE RONDE VALLEY, WALLOWA
COUNTY, FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON, NORTHERN
BLUE MOUNTAINS OF OREGON, SOUTHERN BLUE MOUNTAINS OF OREGON,
NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES, JOHN DAY
BASIN, OCHOCO-JOHN DAY HIGHLANDS

VERY LIGHT OR CALM SURFACE WINDS AND STRONG SURFACE BASED
TEMPERATURE INVERSIONS WILL MAINTAIN A STABLE AIRMASS AND STAGNANT
AIR CONDITIONS...WHICH WILL TRAP AIR POLLUTANTS IN THE BOUNDARY
LAYER. AS SUCH AN AIR STAGNATION ADVISORY IS IN EFFECT FOR THE AREAS
LISTED ABOVE THROUGH 4 PM PST WEDNESDAY AFTERNOON. PLEASE REFER TO
PDXNPWPDT FOR MORE DETAILS.

A WEATHER SYSTEM WILL MOVE THROUGH THE REGION OVERNIGHT BRINGING
SNOW TO ALL THE FORECAST AREA. ACCUMULATIONS WILL RANGE FROM 1 TO 3
INCHES IN THE LOWER ELEVATIONS TO 4 TO 8 INCHES IN THE MOUNTAINS.
NUMEROUS WEATHER ADVISORIES HAVE BEEN ISSUED FOR THIS EVENT.


.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

AIR STAGNATION ADVISORY WEDNESDAY
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN COLUMBIA RIVER
GORGE OF WASHINGTON, KITTITAS VALLEY, YAKIMA VALLEY, LOWER
COLUMBIA BASIN OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS
OF WASHINGTON, EASTERN COLUMBIA RIVER GORGE OF OREGON, NORTH
CENTRAL OREGON, CENTRAL OREGON, LOWER COLUMBIA BASIN OF
OREGON, GRANDE RONDE VALLEY, FOOTHILLS OF THE BLUE MOUNTAINS
OF OREGON, NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES,
JOHN DAY BASIN

SNOW WEDNESDAY
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN COLUMBIA RIVER
GORGE OF WASHINGTON, KITTITAS VALLEY, YAKIMA VALLEY, LOWER
COLUMBIA BASIN OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS
OF WASHINGTON, NORTHWEST BLUE MOUNTAINS, EASTERN COLUMBIA
RIVER GORGE OF OREGON, NORTH CENTRAL OREGON, CENTRAL OREGON,
LOWER COLUMBIA BASIN OF OREGON, GRANDE RONDE VALLEY, WALLOWA
COUNTY, FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON, NORTHERN
BLUE MOUNTAINS OF OREGON, SOUTHERN BLUE MOUNTAINS OF OREGON,
NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES, JOHN DAY
BASIN, OCHOCO-JOHN DAY HIGHLANDS

VERY LIGHT OR CALM SURFACE WINDS AND STRONG SURFACE BASED
TEMPERATURE INVERSIONS WILL MAINTAIN A STABLE AIRMASS AND STAGNANT
AIR CONDITIONS...WHICH WILL TRAP AIR POLLUTANTS IN THE BOUNDARY
LAYER. AS SUCH AN AIR STAGNATION ADVISORY IS IN EFFECT FOR THE AREAS
LISTED ABOVE THROUGH 4 PM PST WEDNESDAY AFTERNOON. PLEASE REFER TO
PDXNPWPDT FOR MORE DETAILS.

MULTIPLE WEATHER SYSTEMS ARE EXPECTED TO MOVE THROUGH THE REGION
THIS WEEK. THE FIRST STORM WILL MOVE INLAND ON TUESDAY
NIGHT...BRINGING SNOW TO THE AREA THROUGH WEDNESDAY AFTERNOON.
WINTER WEATHER ADVISORIES ARE IN EFFECT FOR THE NORTHWEST BLUE
MOUNTAINS AND THE FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON
THROUGH 4 PM PST WEDNESDAY AFTERNOON. PLEASE REFER TO PDXWSWPDT FOR
MORE DETAILS.

ANOTHER DISTURBANCE WILL APPROACH THE PACIFIC NORTHWEST ON
THURSDAY...WITH SNOW CHANGING OVER TO RAIN BY FRIDAY. PERIODS OF
RAIN OR SNOW WILL THEN CONTINUE THROUGH EARLY NEXT WEEK.


.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

GRAPHICAL FORECASTS OF WEATHER HAZARDS OUT TO SEVEN DAYS
ARE DISPLAYED ON THE WORLD WIDE WEB AT:

WWW.WRH.NOAA.GOV/PDT/CURRENTHAZARDS/HWO.HTML

ALL LETTERS IN THE ABOVE URL ARE LOWER CASE...EXCEPT THE H IN
CURRENTHAZARDS.