Heavy rainfall hit the lowlands, flooding some homes in Sequim and pushing 7 million gallons of diluted sewage into the Port Angeles Harbor, while 19 inches of snow fell in one day at Hurricane Ridge.
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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.
Heavy rainfall hit the lowlands, flooding some homes in Sequim and pushing 7 million gallons of diluted sewage into the Port Angeles Harbor, while 19 inches of snow fell in one day at Hurricane Ridge.
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 15, 8:30 AM PST, 3 hours 30 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
930 AM PDT SUN MAR 15 2015
.SYNOPSIS...RAIN...ALONG WITH SNOW IN THE MOUNTAINS...WILL FALL
TODAY. A LOW PRESSURE CENTER WILL MOVE ACROSS WESTERN WASHINGTON
THIS EVENING GIVING SOME BREEZY OR WINDY CONDITIONS. MONDAY WILL BE
CONSIDERABLY DRIER. A WEAK WEATHER SYSTEM WILL ARRIVE TUESDAY. THE
WEATHER WILL REMAIN UNSETTLED INTO THE WEEKEND.
&&
.SHORT TERM...RAIN SPREAD FROM THE SOUTH LAST NIGHT...6-12 HOURS
BEFORE EARLIER MODELS BROUGHT IT NORTH. RAIN WILL LIKELY LAST ALL
DAY BEFORE TAPERING THIS EVENING. A DEEP LOW OFF THE OREGON COAST
WILL MOVE INLAND THIS AFTERNOON ON THE CENTRAL COAST THEN RAPIDLY
FILL THIS EVENING. STRONG GUSTY WINDS ARE LIKELY ON THE CENTRAL
COAST AND POSSIBLY A FEW OTHER ZONES. A WIND ADVISORY IS NOW IN
EFFECT FOR THE CENTRAL COAST.
WARMER AIR ASSOCIATED WITH THE FRONT OVER THE AREA WILL NOT REACH
THE NORTH CASCADES AND OLYMPICS UNTIL LATER IF EVER. THIS MEANS
PRECIPITATION WILL BE SNOW IN THOSE AREAS ABOVE ABOUT 4500 FEET.
HAVE ISSUED A WINTER WEATHER ADVISORY FOR THOSE ZONES. AROUND A FOOT
OF NEW SNOW IS POSSIBLE FROM THIS MORNING THROUGH LATE TONIGHT. WITH
A DEEP CLOUD LAYER AND RAIN...HIGH TEMPERATURES TODAY OVER THE
LOWLANDS SEEM UNLIKELY TO GET OUT OF THE LOW 50S.
AFTER THE FILLING SURFACE LOW PASSES TO THE NORTHEAST TONIGHT MODELS
SHOW SIGNIFICANT DRYING. HAVE CUT POPS FOR MOST AREAS MONDAY AND
LIMITED A CHANCE OF SHOWERS TO THE MOUNTAINS. THERE SHOULD BE AT
LEAST SOME SUN TOMORROW AND HIGHS SHOULD REBOUND INTO THE MID AND
UPPER 50S. A WEAK WEATHER SYSTEM ON TUESDAY WILL BRING MORE CLOUDS
AND A CHANCE OF SHOWERS. HIGHS WILL REMAIN IN THE 50S. BURKE
LONG TERM...PREVIOUS DISCUSSION...A RIDGE WILL START TO BUILD OVER
THE REGION WEDNESDAY INTO THURSDAY. THE CURRENT FORECAST HAS A
CHANCE OF RAIN INDICATED FOR WEDNESDAY. A COUPLE OF MODELS INCLUDING
THE ECMWF KEEP SOME LIGHT QPF OVER THE AREA EVEN WITH A BUILDING
RIDGE. WILL REFRAIN FROM ANY CHANGES TO THE EXTENDED GIVEN THE
UNSTABLE MODEL SOLUTIONS. DRY WEATHER IS FORECAST FOR THURSDAY...
THEN MORE RAIN SHOULD RETURN BY FRIDAY AND INTO THE WEEKEND.
&&
.HYDROLOGY...THE SKOKOMISH RIVER CRESTED AT 15.5 FEET YESTERDAY
WHICH WAS ONE FOOT BELOW FLOOD STAGE. RAIN TODAY WILL PUSH THE RIVER
UP AGAIN. A CREST OF AROUND 16 FEET...STILL BELOW THE FLOOD STAGE OF
16.5 FEET...SEEMS POSSIBLE. OTHER RIVERS WILL RISE TODAY BUT NO
FLOODING IS EXPECTED TODAY OR OVER THE NEXT SEVEN DAYS. BURKE
&&
.AVIATION...STRONG SOUTHWEST FLOW ALOFT WILL CONTINUE TODAY...AS A
DEVELOPING FRONTAL SYSTEM OVER THE OREGON OFFSHORE WATERS MOVES INTO
WESTERN WASHINGTON. THE FLOW ALOFT WILL VEER TO WEST TONIGHT AS A
WEAK UPPER TROUGH FOLLOWS THE FRONT. THE AIR MASS WILL REMAIN MOIST
AND GENERALLY STABLE.
WIDESPREAD IFR CONDITIONS PREVAIL ACROSS THE FORECAST AREA THIS
MORNING WITH 1-3SM RA BR AND CEILINGS MOSTLY AOB 010BKN-OVC WITH
MULTIPLE OVC LAYERS ABOVE. THESE CONDITIONS SHOULD CONTINUE THROUGH
LATE TODAY...WITH GRADUAL IMPROVEMENT TONIGHT AS THE FRONTAL SYSTEM
MOVES WELL EAST OF THE CASCADES.
KSEA...NORTHERLY WIND 6-12 KT RISING TO 10-20 KT LATE AFTERNOON...
THEN SWITCHING TO SOUTHERLY DURING THE EVENING. IFR CONDITIONS
SHOULD CONTINUE THROUGH LATE TODAY...WITH GRADUAL IMPROVEMENT
TONIGHT. MCDONNAL
&&
.MARINE...A 1003 MB LOW OVER THE NORTHERN OREGON OFFSHORE WATERS
THIS MORNING WILL MOVE NORTHEAST INTO THE SOUTHWEST WASHINGTON LATE
TODAY...THEN WEAKEN QUICKLY AS IT MOVES EAST OF THE CASCADES
TONIGHT. NORTH TO NORTHWEST GALES ARE LIKELY OVER THE FOUR SOUTHERN
COASTAL WATERS ZONES THIS AFTERNOON AND EVENING...WITH SMALL CRAFT
ADVISORY WINDS OVER THE REMAINING COASTAL AND INLAND WATERS ZONES.
WEAK HIGH PRESSURE WILL MOVE OVER THE AREA LATER TONIGHT...AND LIGHT
OFFSHORE FLOW WILL DEVELOP MONDAY. RELATIVELY WEAK FRONTS WILL
PROBABLY MOVE THROUGH THE AREA TUESDAY AND THURSDAY. MCDONNAL
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...WIND ADVISORY CENTRAL COAST THIS AFTERNOON AND EVENING.
WINTER WEATHER ADVISORY NORTH CASCADES AND OLYMPICS TODAY AND
TONIGHT.
PZ...GALE WARNING COASTAL WATERS ZONES 153...156.173...176.
SMALL CRAFT ADVISORY ALL REMAINING ZONES.
&&
YOU CAN SEE AN ILLUSTRATED VERSION OF THIS FORECAST DISCUSSION AT
WWW.WEATHER.GOV/SEATTLE/GAFD/LATEST_WEBAFD.HTMLThe national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
Several homes and apartments around Sequim were flooded as a result of local heavy rainfall of 1 to 2 inches in less than 12 hours.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2015Every state in 2015This day in weather historyWarnings in Washington, March 2015
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: 568025.