A gustnado with brief gusty swirling winds caused minor damage at a residence 4 miles southeast of Mount Vernon. Sheet metal was pulled off a building and boards were twirled around.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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 PDT wrote it up.
A gustnado with brief gusty swirling winds caused minor damage at a residence 4 miles southeast of Mount Vernon. Sheet metal was pulled off a building and boards were twirled around.
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 Pendleton, OR wrote its last area forecast discussion before the first event at May 26, 1:22 PM PST, 48 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PENDLETON OR 222 PM PDT SAT MAY 26 2012 .SHORT TERM...TONIGHT THROUGH TUESDAY. SATELLITE SHOWS UNSTABLE AIRMASS HAS FILLED IN WITH CUMULUS AND STRATOCUMULUS THIS AFTERNOON. NOT MUCH IN THE WAY OF SHOWERS YET EXCEPT ALONG THE CASCADES WHERE SHOWERS AND ISOLATED THUNDERSTORMS HAVE DEVELOPED IN UPSLOPE NORTHEAST FLOW. WILL CONTINUE WITH MOSTLY CLOUDY SKIES ACROSS THE FORECAST AREA THROUGH THE EVENING THEN SOME GRADUAL CLEARING OVERNIGHT. SHOWERS AND ISOLATED THUNDERSTORMS SHOULD BE MAINLY OVER THE MOUNTAINS THROUGH THE EVENING THEN DIMINISH OVERNIGHT AS WELL. SOME AREAS ARE SEEING BREEZY NORTHERLY WINDS TODAY. THESE WILL DECREASE AFTER SUNSET. THE UPPER LEVEL LOW PRESSURE SYSTEM RESPONSIBLE FOR THE COOL CLOUDY WEATHER THE PAST FEW DAYS WILL FINALLY MOVE OFF TO THE EAST SUNDAY. A WEAK RIDGE WILL BUILD OVER THE REGION WITH IMPROVING CONDITIONS. EXPECT LESS CLOUD COVER AND SHOWERS ALONG WITH WARMER TEMPERATURES. THE RIDGE WILL MOVE OFF TO THE EAST ON MONDAY AS ANOTHER UPPER TROUGH APPROACHES THE PACIFIC NORTHWEST. EXPECT INCREASING CLOUDS DURING THE DAY WITH SHOWERS DEVELOPING OVER THE MOUNTAINS IN THE AFTERNOON. THE TROUGH AND SURFACE COLD FRONT MOVE THROUGH MONDAY NIGHT AND EARLY TUESDAY WITH SHOWERS. SHOULD SEE POST FRONTAL CLEARING DURING THE DAY TUESDAY WITH BREEZY WESTERLY WINDS. 94 .LONG TERM...TUESDAY NIGHT THROUGH SATURDAY. CONFIDENCE IN THE MEDIUM RANGE MODELS IS RATHER LOW DURING THE EXTENDED PERIOD... ESPECIALLY FOR FRI THROUGH SAT. A FLAT UPPER LEVEL RIDGE WILL BRING DRY CONDITIONS FOR MOST OF THE AREA TUES NIGHT THROUGH THURS WITH THE EXCEPTION OF THE EAST SLOPES OF THE WA CASCADES THAT MAY SEE OCCASIONAL LIGHT SHOWER ACTIVITY ASSOCIATED WITH SURGES OF MOISTURE ACROSS WESTERN WASHINGTON. THERE IS NOT A BIG INCREASE IN HEIGHTS AND IT WILL BE PARTLY TO MOSTLY CLOUDY DURING THIS PERIOD...THEREFORE TEMPS WILL CHANGE LITTLE FROM DAY TO DAY. WHEN COMPARING THE GFS/ECMWF/GEM...BIG DIFFERENCES ARE NOTED UPSTREAM OVER THE GULF OF ALASKA DURING THE MID WEEK. THE ECMWF HAS SEVERAL EMBEDDED WAVES IN A BROAD UPPER TROUGH OFF THE GULF OF ALASKA THAT ARE NOT NEARLY AS STRONG AS THE GFS AND GEM. ONE OF THESE WAVES ADVERTISED BY THE ECMWF IS PROGGED TO BREAK DOWN THE RIDGE AS EARLY AS FRIDAY WITH A FAIRLY STRONG COLD FRONT FRIDAY NIGHT. THE GFS...ON THE OTHER HAND...GRADUALLY BREAKS DOWN THE RIDGE FRIDAY NIGHT AND SATURDAY. WILL INCREASE POPS TO 20-40 PERCENT FRIDAY NIGHT AND SATURDAY AND WILL SHAVE TEMPS DOWN A FEW DEGREES ON SATURDAY. AT THIS TIME...I'M LEANING TOWARDS THE ECMWF SOLUTION BUT DO NOT WANT TO SHOW A MAJOR CHANGE UNTIL THERE IS BETTER RUN-TO-RUN CONTINUITY OF THE MODELS. WISTER && .AVIATION...18Z TAFS (PREVIOUS DISCUSSION). MAIN AVIATION CONCERN THROUGH THIS EVENING WILL BE WINDS AS NORTHERLY WINDS 10-20 KNOTS AND HIGHER GUSTS CAN BE EXPECTED. WINDS WILL DIMINISH AFTER SUNSET. VFR CONDITIONS WILL PREVAIL FOR THE NEXT 24 HOURS WITH BKN-OVC CIGS AT OR ABOVE 8000 FEET AGL AT ALL TAF SITES. WISTER && .PRELIMINARY POINT TEMPS/POPS... PDT 44 72 46 70 / 10 10 10 10 ALW 49 72 49 73 / 10 10 10 10 PSC 45 76 48 77 / 10 10 0 10 YKM 42 75 44 72 / 10 10 0 10 HRI 44 73 47 74 / 10 10 0 10 ELN 43 73 45 69 / 10 10 10 10 RDM 34 70 38 68 / 20 10 10 10 LGD 44 66 41 69 / 30 20 10 20 GCD 39 68 41 71 / 20 10 10 20 DLS 48 72 49 70 / 10 10 10 10 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...NONE. WA...NONE. && THREAT INDEX SUNDAY : GREEN MONDAY : GREEN TUESDAY : GREEN GREEN: NONE OR LIMITED NEED FOR WATCHES, WARNINGS, OR ADVISORIES. YELLOW: A FEW WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT. RED: NUMEROUS WATCHES, WARNINGS, OR ADVISORIES POSSIBLE OR IN EFFECT. FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT... WWW.WEATHER.GOV/PENDLETON 94/85/85
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
500 AM PDT SAT MAY 26 2012
ORZ041-042-044-049-050-502-503-505>509-WAZ024-026>030-520-521-
271145-
EASTERN COLUMBIA RIVER GORGE OF OREGON-NORTH CENTRAL OREGON-
LOWER COLUMBIA BASIN OF OREGON-GRANDE RONDE VALLEY-WALLOWA COUNTY-
NORTHERN BLUE MOUNTAINS OF OREGON-
SOUTHERN BLUE MOUNTAINS OF OREGON-JOHN DAY BASIN-OCHOCO-
JOHN DAY HIGHLANDS-
FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON-
FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON-
EAST SLOPES OF THE OREGON CASCADES-
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 OF WASHINGTON-
EAST SLOPES OF THE WASHINGTON CASCADES-SIMCOE HIGHLANDS-
500 AM PDT SAT MAY 26 2012
THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.
.DAY ONE...TODAY AND TONIGHT
THUNDERSTORMS
EAST SLOPES OF THE WASHINGTON CASCADES, EASTERN COLUMBIA RIVER
GORGE OF WASHINGTON, EASTERN COLUMBIA RIVER GORGE OF OREGON,
NORTH CENTRAL OREGON, EAST SLOPES OF THE OREGON CASCADES
A LARGE UPPER LOW PRESSURE SYSTEM WILL CONTINUE TO CIRCULATE
MOISTURE AROUND IT COUNTER CLOCKWISE INTO THE FORECAST AREA TODAY
AND TONIGHT. THERE WILL BE SOME INSTABILITY AS WELL. THE COMBINATION
OF THESE WITH SOLAR HEATING MAY RESULT IN ISOLATED THUNDERSTORMS
ALONG THE SOUTHERN WASHINGTON AND THE NORTHERN OREGON CASCADE EAST
SLOPES THIS AFTERNOON AND THIS EVENING. ANY STORMS THAT DO DEVELOP
WILL BE WEAK. ELSEWHERE CONDITIONS WILL BE DRY AND SLIGHTLY WARMER
THAN ON FRIDAY.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.
DRY CONDITIONS WILL PREVAIL ON SUNDAY WHICH WILL BE FOLLOWED BY
ANOTHER WEATHER SYSTEM ON MONDAY. THOUGH MONDAY'S WEATHER SYSTEM
WILL NOT BE AS STRONG THERE WILL STILL BE A PERIOD OF UNSETTLED
SHOWERY CONDITIONS. CONDITIONS WILL THEN BECOME DRY AGAIN WITH A
FASTER WARMING TREND FROM TUESDAY THROUGH THE REST OF THE 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.The national radar mosaic for the moment the first event began.
1 strong wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2012Every state in 2012This day in weather historyWarnings in Oregon, May 2012
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: 374981.