The Naches River at Naches rose slightly above flood stage with no damage reported.
Every event with a place to put it. 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.
The Naches River at Naches rose slightly above flood stage with no damage reported.
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 18, 9:20 PM PST, 4 hours 25 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE PENDLETON OR 1020 PM PDT MON MAY 18 2009 UPDATED AVIATION DISCUSSION .UPDATE...THE THUNDERSTORM ACTIVITY THAT DEVELOPED OVER THE GRANDE RONDE VALLEY AND WALLOWA COUNTY HAS MOVED INTO IDAHO. A FEW SHOWERS REMAIN IN WALLA WALLA COUNTY EAST OF DAYTON. WITH LOSS OF HEATING EXPECT THUNDERSTORM THREAT TO DECREASE. WILL UPDATE TO REMOVE EVENING THUNDERSTORMS SHORTLY. PRECIPITATION AHEAD OF FRONTAL SYSTEM IN WESTERN WASHINGTON IS APPROACHING THE CASCADES. SPILLOVER SHOWERS WILL DEVELOP NEAR THE CREST WITH THE FRONT EXPECTED TO MOVE THROUGH EASTERN WASHINGTON AND OREGON TUESDAY MORNING. COONFIELD && .AVIATION...06Z TAFS...A COLD FRONT WILL BRING AN INCREASE IN LOW CLOUDS AND A CHANCE OF SHOWERS EARLY TUESDAY MORNING. SURFACE WINDS WILL INCREASE BEHIND THE FRONT FOR ALL TAF SITES. WINDS WILL INCREASE TO 15-20 KT IN THE AFTERNOON. 76 && .PREV DISCUSSION... /ISSUED 337 PM PDT MON MAY 18 2009/ SHORT TERM...TONIGHT THROUGH WEDNESDAY. A COLD FRONT IS APPROACHING THE COAST THIS AFTERNOON...AND MOISTURE AHEAD OF THE FRONT IS INCREASING ACROSS CENTRAL OREGON. THIS IS EVIDENT BY CUMULUS CLOUDS ON VISIBLE. RIGHT NOW...THE CAP IS PRETTY STRONG AND THERE HAS BEEN LITTLE VERTICAL DEVELOPMENT OF THE CLOUDS. THE QUESTION THAT REMAINS IS WHETHER THE CAP WILL BREAK LEADING TO CONVECTION AND WILL THESE STORMS BE STRONG OR SEVERE. BELIEVE ADDITIONAL DAYTIME HEATING ALONG WITH A VERY WEAK DISTURBANCE OVER SOUTH CENTRAL OREGON AS SEEN ON WATER VAPOR LOOPS WILL BREAK THE CAP AND LEAD TO LATE AFTERNOON AND EVENING THUNDERSTORMS. THE MODERATE VERTICAL SHEAR WILL HELP SUSTAIN UPDRAFTS FOR THE POTENTIAL OF STRONG THUNDERSTORMS...AND ONE OR TWO OF THE STORMS COULD PRODUCE LARGE HAIL AND/OR STRONG OUTFLOWS. THE COLD FRONT WILL SWEEP EAST OF THE CASCADES LATE TONIGHT AND TUESDAY. THERE COULD BE ISOLATED THUNDERSTORMS AHEAD OF THE FRONT IN AREAS EAST OF THE BLUE MOUNTAINS. OTHERWISE...THE MAIN IMPACT FROM THIS FRONT WILL BE WINDS. TIGHT PRESSURE GRADIENTS WILL LEAD TO WINDY CONDITIONS AND PATCHY BLOWING DUST ACROSS THE COLUMBIA BASIN AND SURROUNDING VALLEYS. CONFIDENCE IS HIGH THAT WINDS IN THE KITTITAS VALLEY WILL BE 30-40 MPH WHICH WARRANTS A WIND ADVISORY. THE WIND ADVISORY WILL BE ISSUED DURING THE AFTERNOON PACKAGE. WINDS WILL DECREASE OVERNIGHT. TEMPERATURES ON TUESDAY WILL BE MUCH COOLER THAN TODAY...ABOUT 20-25 DEGREES COOLER. TEMPERATURES TUESDAY NIGHT ARE EXPECTED TO BE IN THE LOWER 30S TO MID 40S...SO MANY PEOPLE WILL BE CHANGING FROM AIR CONDITIONERS TODAY TO HEATERS TUESDAY NIGHT. AT THIS TIME...IT DOES NOT APPEAR THAT TEMPS IN THE BASIN AND ADJACENT VALLEYS WILL FALL TO BELOW FREEZING. NO MAJOR WEATHER CONCERNS ARE EXPECTED ON WEDNESDAY. THE AREA WILL BE UNDER A DRY WESTERLY FLOW WITH NEAR SEASONAL TEMPERATURES. JOHNSON LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY...MODELS ARE IN GOOD AGREEMENT TOWARD THE END OF THE WEEK. A WESTERLY FLOW WILL BE OVER THE REGION WITH DRY AND WARM CONDITIONS. MAXIMUM TEMPERATURES WILL WARM TO THE MID TO UPPER 70S FOR THE LOWER ELEVATIONS BY FRIDAY WITH UPPER 60S TO LOWER 70S IN THE HIGHER ELEVATIONS. DURING THE WEEKEND...THE MODELS DIVERGE IN THE DETAILS...THOUGH BOTH MODELS ARE KEEPING THE REGION DRY INTO NEXT WEEK. THE GFS MODEL BRINGS A SHORTWAVE TROUGH THROUGH THE PACIFIC NORTHWEST FRIDAY NIGHT AND SATURDAY WHILE THE EUROPEAN MODEL KEEPS A WESTERLY FLOW. HAVE LEANED MORE TOWARD THE EUROPEAN AS IT HAS BEEN MORE CONSISTENT. THIS WILL KEEP THE REGION UNDER A DRY WESTERLY FLOW THROUGH THE WEEKEND. DMH HYDROLOGY...A FLOOD WATCH WAS ISSUED EARLIER FOR THE NACHES RIVER NEAR NACHES. THE RIVER IS WELL ABOVE BANKFULL AND IS FORECAST TO RISE TO FLOOD STAGE BY TUESDAY MORNING. HYDROLOGIC STATEMENTS HAVE ALSO BEEN ISSUED FOR THE YAKIMA RIVER AND GRANDE RONDE RIVER. SNOW MELT RUNOFF CONTINUES TO CAUSE HIGH WATER LEVELS...AND LEVELS WILL REMAIN HIGH THROUGH MOST OF THE WEEK. && .PRELIMINARY POINT TEMPS/POPS... PDT 57 69 43 69 / 10 30 10 0 ALW 59 69 46 70 / 10 30 10 0 PSC 59 76 45 73 / 0 10 10 0 YKM 52 67 41 70 / 10 20 10 0 HRI 58 72 44 72 / 10 20 10 0 ELN 52 63 41 68 / 10 20 10 0 RDM 48 63 30 69 / 10 20 10 0 LGD 53 62 40 66 / 20 30 20 0 GCD 53 63 39 67 / 20 20 10 0 DLS 56 64 44 73 / 10 30 10 0 && .PDT WATCHES/WARNINGS/ADVISORIES... OR...NONE. WA...WIND ADVISORY FROM 10 AM TO 10 PM PDT TUESDAY FOR WAZ026. && TI:GYG FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT... WWW.WEATHER.GOV/PENDLETON 76/76/76
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
240 AM PDT TUE MAY 19 2009
UPDATED TO ADD REMOVE THUNDERSTORMS FOR REMAINDER OF TONIGHT
ORZ041>044-049-050-501>506-WAZ024-026>030-501-502-191415-
EASTERN COLUMBIA RIVER GORGE OF OREGON-NORTH CENTRAL OREGON-
CENTRAL OREGON-LOWER COLUMBIA BASIN OF OREGON-GRANDE RONDE VALLEY-
WALLOWA COUNTY-FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON-
NORTHERN BLUE MOUNTAINS OF OREGON-
SOUTHERN BLUE MOUNTAINS OF OREGON-
NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES-JOHN DAY BASIN-
OCHOCO-JOHN DAY HIGHLANDS-
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-
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON-
EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON-
240 AM PDT TUE MAY 19 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.
.DAY ONE...REST OF TONIGHT
A COLD FRONT IS MOVING ONSHORE...AND MID LEVEL CLOUDS WILL INCREASE
ACROSS EASTERN OREGON AND SOUTHEAST WASHINGTON AHEAD OF THE FRONT.
THE AIR MASS WILL BECOME MORE UNSTABLE LATE THIS
AFTERNOON...RESULTING IN ISOLATED THUNDERSTORMS IN THE AREAS LISTED
ABOVE. A FEW THUNDERSTORMS COULD BE STRONG WITH HAIL UP TO PENNY
SIZE AND WIND GUSTS TO AROUND 50 MPH.
.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY
FLOODING TUESDAY AND WEDNESDAY
YAKIMA VALLEY (NACHES RIVER NEAR NACHES)
THUNDERSTORMS TUESDAY
WALLOWA COUNTY
STRONG WIND TUESDAY
KITTITAS VALLEY
THERE IS A SLIGHT CHANCE OF THUNDERSTORMS IN WALLOWA COUNTY ON
TUESDAY AS THE COLD FRONT MOVES EAST OF THE CASCADES...YET THE AIR
MASS WILL STABILIZE BEHIND THE FRONT WITH THUNDERSTORMS
DIMINISHING. THE FRONT WILL BRING WINDY TO VERY WINDY CONDITIONS TO
THE AREA ON TUESDAY WITH THE STRONGEST WINDS IN THE KITTITAS VALLEY.
A WIND ADVISORY [NWS PRODUCT PDXNPWPDT] IS IN EFFECT FOR THE
KITTITAS VALLEY FROM 10 AM PDT TUESDAY MORNING TO 10 PM PDT TUESDAY
EVENING.
SNOW MELT RUNOFF CONTINUES TO BRING HIGH WATER LEVELS TO MANY
RIVERS...PARTICULARLY THE NACHES RIVER, THE YAKIMA RIVER, AND THE
GRANDE RONDE RIVER. THE NACHES RIVER NEAR NACHES IS EXPECTED TO
RISE TO ABOVE FLOOD STAGE ON TUESDAY...AND A FLOOD WATCH HAS BEEN
ISSUED. FOR DETAILS...REFER TO THE NWS PRODUCT PDXFFAPDT.
ADDITIONAL INFORMATION CAN BE FOUND IN THE HYDROLOGIC OUTLOOK IN
PRODUCT PDXRVSPDT.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED TODAY (TUESDAY) FOR THUNDERSTORMS
IN WALLOWA COUNTY AND FOR VERY WINDY CONDITIONS IN THE KITTITAS
VALLEY ...AND TODAY THROUGH THROUGH WEDNESDAY FOR POSSIBLE FLOODING
ALONG THE NACHES RIVER.
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...EXCEPT THE H IN
CURRENTHAZARDS.The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
The Naches River at Naches crested at 17.13 feet on May 19 between 8:45 am PST and 11:30 am PST.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2009Every state in 2009This day in weather historyWarnings in Washington, May 2009
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: 162760.