A spotter saw a small funnel cloud east of Enumclaw. It was brief and spotter could not see if it touched the ground due to the trees.
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The episode as NWS SEW wrote it up.
A spotter saw a small funnel cloud east of Enumclaw. It was brief and spotter could not see if it touched the ground due to the trees.
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 Jun 9, 8:45 AM PST, 3 hours 45 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SEATTLE WA
945 AM PDT WED JUN 9 2010
.SYNOPSIS...LOW PRESSURE ALOFT WILL KEEP THE AIR MASS UNSTABLE
ENOUGH FOR SHOWERS THROUGH THURSDAY...ALTHOUGH THE THREAT OF SHOWERS
WILL DECREASE OVER TIME. HIGH PRESSURE ALOFT WILL MOVE OVER THE
PACIFIC NORTHWEST ON FRIDAY...AND WILL BE THE START OF A TREND
TOWARD WARMER AND DRIER WEATHER. STRONG HIGH PRESSURE ALOFT...ALONG
WITH OFFSHORE FLOW...WILL PREVAIL OVER THE AREA THIS WEEKEND FOR
SUMMER LIKE WEATHER.
&&
.SHORT TERM...
AN UPPER LOW WAS OVER THE REGION AT THIS TIME AND WILL CONTINUE
MOVING SLOWLY E. THE ASSOCIATED SFC LOW AND TRAILING OCCLUDED FRONT
HAS MOVED ONTO THE FAR SRN OREGON/NRN CA COASTS...AND WILL REMAIN S
OF THE CWA. ESSENTIALLY...THE AIR MASS OVER THE AREA WILL BE COOL
AND CONDITIONALLY UNSTABLE TODAY DUE TO CYCLONIC FLOW ALOFT.
THEREFORE ANTICIPATE BANDS OF SHOWERS TO MOVE ACROSS THE AREA AT
TIMES. THE CURRENT FORECAST HAS A RISK OF TSTMS BUT THE THREAT WAS
QUITE LOW. THE BEST INSTABILITY FOR TSTMS WILL BE E OF THE CASCADES.
WILL LEAVE THE MENTION OF TSTMS IN THE FORECAST SINCE THERE IS AN
OUTSIDE CHANCE OF A ONE CLAP WONDER OVER THE INTERIOR THIS AFTERNOON.
THE UPPER TROF WILL MOVE OVER THE GREAT BASIN THU AFTERNOON. THUS
ANTICIPATE THE SHOWER THREAT TO DECREASE OVER TIME...WITH THE BEST
CHANCE ENDING UP OVER THE MOUNTAINS BY LATE THU. AN UPPER RIDGE WILL
MOVE OVER THE PAC NW ON FRI...HERALDING IN A TREND TOWARD DRIER AND
WARMER WEATHER.
.LONG TERM FROM THE PREV DISCUSSION...
THE UPPER RIDGE WILL CONTINUE BUILDING AS IT TILTS POSITIVELY INTO
BRITISH COLUMBIA AND THEN ACROSS THE PACIFIC NORTHWEST LATE SATURDAY
THROUGH SUNDAY. THE LATEST RUN OF THE GFS SHOWS THE RIDGE A BIT
STRONGER THAN PREVIOUS RUNS -- WITH 500 MB HEIGHTS OVER WESTERN
WASHINGTON CLIMBING ABOVE 5850 METERS -- AND IT IS ALSO BEGINNING TO
SHOW AT LEAST WEAK OFFSHORE FLOW IN THE LOW LEVELS. OUR HIGH
TEMPERATURE FORECAST FOR SATURDAY MIGHT STILL BE ON THE CONSERVATIVE
SIDE.
ON SUNDAY THE UPPER RIDGE AXIS WILL SHIFT SOUTHEAST OF THE FORECAST
AREA AND THE LOW LEVEL FLOW WILL BEGIN TO TURN ONSHORE. IF THE
SLOWER GFS SOLUTION IS CORRECT...THEN SUNDAY WILL BE SIMILARLY WARM
-- OR EVEN A LITTLE WARMER THAN SATURDAY. THE EUROPEAN MODEL SHOWS A
FASTER PROGRESSION OF THE UPPER RIDGE AND THE UPPER TROUGH UPSTREAM.
ALL THE LONGER RANGE MODELS SUGGEST STRONGLY THAT THERE WILL BE A
MARINE PUSH SUNDAY NIGHT AS THE UPPER TROUGH SWINGS INTO THE PACIFIC
NORTHWEST...MAKING FOR A CLOUDY AND MUCH COOLER MONDAY. MCDONNAL
&&
.AVIATION...A FRONT PASSED THROUGH PUGET SOUND EARLY THIS MORNING
FROM SOUTHWEST TO NORTHEAST AND IS CURRENTLY OVER THE NORTHWEST
INTERIOR. WINDS HAVE SHIFTED TO SOUTHWEST BEHIND THE FRONT AND
STEADY RAIN HAS TURNED MORE SHOWERY. A BROAD UPPER LEVEL LOW WILL
MOVE OVER WESTERN WASHINGTON TODAY AND STALL TONIGHT. SURFACE FLOW
WILL SWITCH TO ONSHORE TODAY. SOME INSTABILITY UNDER THE UPPER LOW
COULD BRING ISOLATED THUNDERSTORMS THIS AFTERNOON AND EVENING.
WITH PLENTY OF LOW LEVEL MOISTURE...LIGHT SURFACE GRADIENTS AND
LIGHT WINDS IN THE LOWER LAYERS OF THE ATMOSPHERE...CEILINGS ARE
GENERALLY MVFR WITH LOCAL IFR. TREND TODAY WILL BE IMPROVEMENT WITH
MOST CEILINGS RISING TO 3K FT OR SO...BUT STILL SOME 1-2K FT
CEILINGS IN SHOWERS. SOUTHERLY SURFACE GRADIENTS INCREASING LATER
THIS MORNING INTO THE AFTERNOON HOURS. CEILINGS WILL REMAIN NEAR
3000 FEET OVERNIGHT INTO THURSDAY MORNING.
KSEA...DISCUSSION ABOVE APPLIES. THERE IS A CHANCE OF A THUNDERSTORM
LATER THIS AFTERNOON INTO THE EARLY EVENING HOURS BUT NOT ENOUGH OF
A CHANCE TO INCLUDE IN THE TAF AT THIS POINT. SOUTHWEST WIND 6-10
KNOTS THROUGH THE MORNING...INCREASING A BIT TO 8-12 KT IN THE
AFTERNOON AND EVENING HOURS. CHB
&&
.MARINE...ONSHORE GRADIENTS WILL INCREASE THIS AFTERNOON AS HIGH
PRESSURE BEGINS TO BUILD TO THE SOUTHWEST. HIGH PRESSURE WILL BUILD
OVER THE COASTAL AND OFFSHORE WATERS THURSDAY AND INTO THE COASTAL
WATERS ON FRIDAY. THE HIGH WILL REMAIN IN PLACE OVER THE WEEKEND.
SMALL CRAFT ADVISORY WESTERLIES ARE LIKELY IN THE STRAIT DURING THE
LATE AFTERNOON AND EVENING HOURS EACH DAY THROUGH THE WEEKEND. A
MARINE PUSH SUNDAY AFTERNOON INTO SUNDAY EVENING MEANS GALE FORCE
WESTERLIES ARE POSSIBLE IN THE STRAIT SUNDAY EVENING. CHB
&&
.AVALANCHE...CONTRIBUTED BY THE NORTHWEST WEATHER AND AVALANCHE
CENTER ON TUESDAY -- THE RECENT AVALANCHE ACCIDENT ON MT RAINIER
LAST WEEKEND UNDERSCORES THE MESSAGE THAT AS USUAL THE WEATHER NOT
THE CALENDAR DICTATES AVALANCHE DANGER IN THE NW MOUNTAINS IN JUNE.
STORMS DURING THE PAST 10 DAYS HAVE PRODUCED OVER THREE FEET OF SNOW
ABOVE 7 TO 8000 FEET WITH WIND DRIFTS IN EXCESS OF 3 TO 6 FEET ABOVE
CAMP MUIR ON MT RAINER AT THE 10,000 FT LEVEL. SIMILAR UNSTABLE AND
DANGEROUS SNOW CONDITIONS ARE PROBABLE AT HIGHER ELEVATIONS ON MANY
OF THE NW VOLCANOES. AS A GENERAL RULE IN ALL
SEASONS...CLIMBERS...HIKERS... SKIERS...BOARDERS AND OTHERS...SHOULD
ALL FACTOR IN AVALANCHE DANGER AS THEY MAKE THEIR TRIP PLANS AND
ROUTE SELECTIONS. SUCH A RULE IS PARTICULARLY IMPORTANT FOR SAFE
TRAVEL NOW.
AFTER THE MOST RECENT STORM DEPOSITED AN ADDITIONAL 6 TO 12 INCHES
OF SNOW IN HIGHER ELEVATION TERRAIN ON SUNDAY...SOME STABILIZATION
OF THIS NEW SNOW THROUGH EITHER FURTHER SLIDES OR SETTLEMENT IS
UNDERWAY AS OF MID-DAY TUESDAY. HOWEVER WITH YET ANOTHER UPPER
TROUGH EXPECTED TO SLOWLY MOVE OVER THE REGION TUESDAY NIGHT THRU
THURSDAY...FURTHER SNOW ABOVE 7 TO 8000 FEET SHOULD MAKE AVALANCHES
A CONTINUED CONCERN FOR THOSE PLANNING TO VENTURE INTO HIGHER
ELEVATION TERRAIN THE REMAINDER OF THE WEEK. WITH CLEARING SKIES AND
SUBSTANTIAL WARMING EXPECTED TO FOLLOW LATE THIS WEEK AND INTO THE
WEEKEND WHEN FREEZING LEVELS SHOULD CLIMB TO THE HIGHEST LEVELS
SINCE LAST SUMMER (12 TO 14,000 FT OR MORE)...ANOTHER SIGNIFICANT
INCREASE IN AVALANCHE ACTIVITY IS LIKELY DUE TO SUN AND/OR MELT
FRIDAY THROUGH SUNDAY. MAY BE MOST APPROPRIATE TO RESCHEDULE HIGHER
ELEVATION ACTIVITIES...OR AT THE VERY LEAST REMAIN WELL AWARE OF
WEATHER FORECASTS BEFORE HEADING OUT...AND STAY AVALANCHE AWARE
THROUGHOUT YOUR TRIP. SEE NWAC.US FOR DETAILS. MOORE
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...NONE.
PZ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FOR THE CENTRAL AND
EASTERN STRAIT OF JUAN DE FUCA FROM 6 PM TODAY UNTIL 2 AM
PDT THU.
WWW.WEATHER.GOV/SEATTLE
FOR AN ILLUSTRATED VERSION OF THE FORECAST DISCUSSION...PLEASE SEE
WWW.WEATHER.GOV/SEATTLE/GAFD/LATEST_WEBAFD.HTML.The Seattle radar (KATX), 112 km away, was scanning. The volume nearest the first event began at 20:27 UTC.
1 funnel cloud. Local standard time, as filed.
A spotter saw a small funnel cloud east of Enumclaw. It was brief and spotter could not see if it touched the ground due to the trees.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2010Every state in 2010This day in weather historyWarnings in Washington, June 2010
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: 237859.