On Whidbey Island, near Bush point, a mudslide took out part of the road and trees along Susana Drive.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SEW wrote it up.
On Whidbey Island, near Bush point, a mudslide took out part of the road and trees along Susana Drive.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Seattle, WA wrote its last area forecast discussion before the first event at Mar 21, 8:15 AM PST, 3 hours 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SEATTLE WA 915 AM PDT MON MAR 21 2011 .SYNOPSIS...AN UPPER TROUGH WILL GIVE CLOUDS AND A CHANCE OF SHOWERS TODAY AND TUESDAY. WEAK HIGH PRESSURE WILL BRING DRY WEATHER WEDNESDAY. A MORE ACTIVE PATTERN WILL DEVELOP BY THE END OF THE WEEK WITH A SERIES OF FRONTAL SYSTEMS MOVING BRINGING RAIN AT TIMES. && .SHORT TERM...A DIFFUSE UPPER LEVEL TROUGH WILL BE ENOUGH TO KEEP A CHANCE OF SHOWERS IN THE FORECAST FOR THE NEXT COUPLE OF DAYS. AN UPPER LOW MOVING INTO CALIFORNIA ON WEDNESDAY WILL BUILD WEAK HIGH PRESSURE OVER WESTERN WASHINGTON FOR A DRY DAY. NO UPDATES PLANNED THIS MORNING. SCHNEIDER .LONG TERM...PREVIOUS DISCUSSION...A SOMEWHAT UNSETTLED PERIOD IS EXPECTED LATE IN THE WEAK AS THE UPPER LOW TO OUR S ON WED LIFTS N ACROSS THE AREA THU AND FRI. A MORE ORGANIZED FRONTAL SYSTEM WILL LIKELY INCREASE SHOWER ACTIVITY NEXT WEEKEND. NO CHANGES TO THE EXTENDED FORECAST EARLY THIS MORNING. ALBRECHT && .HYDROLOGY...NO WEATHER SYSTEM CAPABLE OF FLOOD-PRODUCING HEAVY RAIN OVER WESTERN WASHINGTON IS IN THE FORECAST FOR THE NEXT TEN DAYS. IT SHOULD ALSO BE NOTED THAT MAJOR RIVER FLOODING EPISODES IN WESTERN WASHINGTON ARE VERY RARE AFTER MID-MARCH. FLOODING IS UNLIKELY ON ANY RIVER...INCLUDING THE GREEN RIVER. SCHNEIDER && .AVIATION...A WEAK UPPER TROUGH WILL REMAIN STALLED OVER THE PACIFIC NORTHWEST TODAY AND TONIGHT WITH LIGHT SOUTHWESTERLY FLOW ALOFT. FLOW WILL BECOME MORE WESTERLY ON TUESDAY. AIR MASS WILL BE MOIST AND SLIGHTLY UNSTABLE WITH SCATTERED SHOWERS. CEILINGS MOSTLY 2-4K FT IN SEVERAL LAYERS. SOUTHWEST SECTION HAS SOME IFR CEILINGS. VISIBILITIES MOSTLY VFR WITH LOCAL 2-4SM IN SHOWERS. SLIGHT IMPROVING TREND THIS AFTERNOON...THEN BACK TO MVFR OVERNIGHT. KSEA...DISCUSSION ABOVE APPLIES. WIND WILL BE SOUTHERLY 5-8 KT THIS MORNING...BECOMING SW 10-15 KT IN THE AFTERNOON. CHB && .MARINE...A TROUGH OF LOW PRESSURE OVER THE INLAND WATERS THIS MORNING WILL MOVE EAST THIS AFTERNOON. MODERATE ONSHORE FLOW WILL DEVELOP...GIVING A BRIEF PERIOD OF SMALL CRAFT ADVISORY WEST WINDS IN THE STRAIT THIS EVENING. ELSEWHERE WINDS WILL REMAIN BELOW 20 KT. GRADIENTS WILL BE LIGHT TUESDAY...THEN TURN MODERATELY OFFSHORE WEDNESDAY AND THURSDAY. ANOTHER WEATHER SYSTEM MAY APPROACH THE AREA ON FRIDAY. CHB && .SEW WATCHES/WARNINGS/ADVISORIES... WA...NONE. PZ...NONE. WWW.WEATHER.GOV/SEATTLE FOR AN ILLUSTRATED VERSION OF THE FORECAST DISCUSSION PLEASE SEE WWW.WEATHER.GOV/SEATTLE/GAFD/LATEST_WEBAFD.HTML (ALL LOWERCASE)
1 debris flow. Local standard time, as filed.
On Whidbey Island, near Bush point, a mudslide gradually took out part of the road and trees along Susana Drive.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2011Every state in 2011This day in weather historyWarnings in Washington, March 2011
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 300931.