A late season lowland snowfall of up to 10 inches fell in a Puget Sound Convergence Zone event between North King and Southern Skagit Counties.
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.
A late season lowland snowfall of up to 10 inches fell in a Puget Sound Convergence Zone event between North King and Southern Skagit Counties.
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 Apr 18, 1:45 PM PST, 4 hours 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SEATTLE WA 245 PM PDT FRI APR 18 2008 .SYNOPSIS...A COLD UPPER LEVEL TROUGH WILL LINGER OVER THE PACIFIC NORTHWEST THROUGH SUNDAY. SNOW SHOWERS ARE POSSIBLE AT TIMES THROUGH SUNDAY MORNING. THE UNUSUALLY COLD AIR MASS WILL PERSIST OVER WESTERN WASHINGTON THROUGH THE WEEKEND...THEN A SLOW WARMING AND DRYING TREND WILL COMMENCE NEXT WEEK. && .SHORT TERM...COLD AIR HAS SETTLED OVER THE REGION NORTH OF SEATTLE. IT WILL SPREAD SOUTH TONIGHT. VIRTUALLY ANY KIND OF WEATHER SEEMS POSSIBLE AT THIS POINT AND INDEED MANY KINDS HAVE ALREADY BEEN OBSERVED...INCLUDING RAIN AND SNOW SHOWERS...SMALL HAIL...AND BREEZY CONDITIONS. SOME ECHOES ON THE NEWLY BACK IN SERVICE KATX RADAR HAVE THREATENED TO TURN INTERESTING BUT AS OF YET NONE HAVE. THE COLD AIR ALOFT WILL STAY THERE THROUGH SUNDAY. UNTIL THEN THE SAME MIX OF WEATHER IS POSSIBLE. HAVE ALSO ADDED ISOLATED THUNDERSTORMS TO THE MIX SATURDAY AFTERNOON. NOT LOOKING FOR ANY ACCUMULATIONS...LESS THAN AN INCH...AND ANY SNOW THAT FALLS IN THE DAYTIME IS LIKELY TO MELT QUICKLY. THAT HAS HAPPENED TODAY ALREADY. OVERNIGHT IF TEMPS STAY AT OR BELOW FREEZING FOR SEVERAL HOURS THERE MIGHT BE A LITTLE ACCUMULATION IN ISOLATED SPOTS. BUT OVERALL THIS DOES NOT LOOK LIKE A WIDESPREAD EVENT...MUCH MORE SHOWERY FOR THAT. EVEN THE MOUNTAINS ARE NOT LIKELY TO GET A LOT OF SNOW AND HAVE INDICATED SUB-ADVISORY AMOUNTS THERE. BY SUNDAY SHOULD SEE A BIT MORE SUN AS UPPER LOW BEGINS TO DISSIPATE. TEMPS WILL STILL BE ON THE COOL SIDE BUT SHOULD SEE SOME PLACES GET TO 50 OR SO. MONDAY WILL BE A DEGREE OR TWO WARMER. BURKE .LONG TERM...NEW MODELS KEEP THINGS COOL THROUGH ABOUT THURSDAY. SOME WARMING INDICATED LATE IN THE WEEK...PERHAPS ALL THE WAY UP TO CLIMATOLOGICAL AVERAGE FOR THIS TIME OF YEAR WHICH IS ABOUT 60 AT KSEA. BURKE && .AVIATION...AN UNSEASONABLY COLD UPPER LEVEL TROUGH OF LOW PRESSURE WILL REMAIN OVER THE REGION TONIGHT AND SAT. THE AIR MASS WILL BE COOL MOIST AND SOMEWHAT UNSTABLE...WITH THE SNOW LEVEL BELOW 1000 FT AND SHOWERS POSSIBLY FALLING AS SNOW OR RAIN AND SNOW MIXED AT SEA LEVEL TONIGHT AND SAT MORNING. THE PUGET SOUND CONVERGENCE ZONE EXTENDING EAST FROM THE EVERETT AREA INTO THE CASCADES WILL CONTINUE THIS EVENING THEN DISSIPATE OVERNIGHT. AT KSEA...THE CONVERGENCE ZONE WILL ALMOST CERTAINLY REMAIN NORTH OF KSEA. VFR WILL BE THE PREDOMINANT CONDITION THIS EVENING...BUT OCCASIONAL BKN OR OVC LAYERS 2000 TO 3000 FT ARE LIKELY IN SHOWERS. THE AIR MASS IS COLD ENOUGH FOR SNOW OR MIXED RAIN AND SNOW AT KSEA ...BUT WORST CASE SCENARIO AND AN OUTSIDE CHANCE AT BEST IS PROBABLY ACCUMULATION OF 1/2 INCH. SOUTHWEST WIND 10 TO 16 KT THIS EVENING AND GUSTING 24 KT...BECOMING SOUTH 8 TO 12 KT OVERNIGHT. MCDONNAL && .MARINE...STRONG ONSHORE FLOW WILL CONTINUE THIS EVENING PRODUCING SMALL CRAFT ADVISORY WINDS ALL WATERS...WITH SHOWER ACTIVITY ADDING TO THE GUSTY NATURE OF THE WINDS. PUGET SOUND CONVERGENCE ZONE WILL CONTINUE THIS EVENING AND DISSIPATE OVERNIGHT. WINDS WILL EASE OVERNIGHT AND GRADUALLY TURN NORTHERLY OFFSHORE AS A SURFACE LOW MOVES FROM SOUTHWEST BRITISH COLUMBIA TO THE NORTH WASHINGTON COAST. A COLD FRONT WILL ARRIVE FROM THE NORTH ON SAT...REINFORCING OFFSHORE NORTHERLY FLOW SAT NIGHT THROUGH MON. MCDONNAL && .SEW WATCHES/WARNINGS/ADVISORIES... GALE WARNING CENTRAL AND EASTERN STRAIT. SMALL CRAFT ADVISORY FOR THE REMAINDER OF THE WATERS. SMALL CRAFT ADVISORY GRAYS HARBOR BAR FOR ROUGH BAR CONDITIONS. WEATHER.GOV/SEATTLE
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
350 PM PDT FRI APR 18 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0345 PM SNOW 2 ESE GOLD BAR 47.85N 121.65W
04/18/2008 M1.8 INCH SNOHOMISH WA TRAINED SPOTTER
ELEVATION 600 FEET.
&&
GRUBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
412 PM PDT FRI APR 18 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0412 PM SNOW 5 NE INDEX 47.87N 121.48W
04/18/2008 M1.0 INCH SNOHOMISH WA TRAINED SPOTTER
&&
GRUBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
538 PM PDT FRI APR 18 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0501 PM SNOW 4 SW EVERETT 47.92N 122.25W
04/18/2008 M1.3 INCH SNOHOMISH WA TRAINED SPOTTER
TOTAL ON GROUND SO FAR. THUNDERSNOW OCCURRING.
0505 PM SNOW 2 ESE GOLD BAR 47.85N 121.65W
04/18/2008 M2.5 INCH SNOHOMISH WA TRAINED SPOTTER
ELEVATION 600 FEET. MEASURED 0.8 INCHES OF SNOW EAST OF
MONROE. STILL SNOWING.
0507 PM SNOW 7 NE MONROE 47.93N 121.88W
04/18/2008 M1.5 INCH SNOHOMISH WA PUBLIC
STILL SNOWING. ELEVATION 500 FEET.
0527 PM SNOW 2 SW EVERETT 47.94N 122.24W
04/18/2008 M1.0 INCH SNOHOMISH WA TRAINED SPOTTER
STILL SNOWING.
&&
GRUBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
545 PM PDT FRI APR 18 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0544 PM SNOW 3 NE MILL CREEK 47.89N 122.16W
04/18/2008 M2.8 INCH SNOHOMISH WA NWS EMPLOYEE
TOTAL SNOWFALL SO FAR. 2 INCHES STILL ON GROUND. 2.0
INCHES FELL IN HALF AN HOUR. STILL SNOWING WITH
THUNDERSNOW.
&&
GRUBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
636 PM PDT FRI APR 18 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0620 PM SNOW 2 SW EVERETT 47.94N 122.24W
04/18/2008 M2.0 INCH SNOHOMISH WA TRAINED SPOTTER
TOTAL ON GROUND. STILL SNOWING.
0636 PM SNOW 3 S EVERETT 47.92N 122.20W
04/18/2008 M2.5 INCH SNOHOMISH WA TRAINED SPOTTER
TOTAL ON GROUND. STILL SNOWING.
&&
GRUBPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
638 PM PDT FRI APR 18 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0610 PM SNOW 3 ENE REDMOND 47.69N 122.06W
04/18/2008 M2.0 INCH KING WA TRAINED SPOTTER
REPORT IS FROM CLEARVIEW IN SNOHOMISH COUNTY. TOTAL SNOW
ON GROUND. ROADS ARE SLIPPERY WITH MULTIPLE ACCIDENTS.
&&
GRUB2 heavy snow. Local standard time, as filed.
Up to 8 inches of snow fell in the lower elevations, 10 inches of snow above 500 feet elevation.
Up to 8 inches of snow fell in the lower elevations, 10 inches of snow above 500 feet elevation.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2008Every state in 2008This day in weather historyWarnings in Washington, April 2008
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: 93219, 93218.