Alert archive / Oregon / Flash Flood Warnings in 2002
Flash Flood Warning 6, NWS Pendleton, OR
NWS Pendleton, OR issued this flash flood warning at Aug 25, 2002, 5:56 PM PDT for Deschutes County, Oregon. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2002, 5:56 PM PDT (00:56 UTC)
- Expired
- Aug 25, 2002, 8:00 PM PDT
- In force
- 2 hr
- Issued by
- NWS Pendleton, OR
- Area
- Counties, with a storm outline in the text
County Deschutes County, OR
The radar
The Portland,OR radar (KRTX), 222 km from the middle of the area, began a volume at 00:59 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Salem/Mcnary, OR (KSLE), launched 00:00Z, 0.9 hours before the alert went out and 163 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1225 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS51 KPDT 260056 FFWPDT ORC017-260300- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PENDLETON OR 554 PM PDT SUN AUG 25 2002 THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL DESCHUTES COUNTY IN CENTRAL OREGON * UNTIL 800 PM PDT * AT 554 PM PDT...LOCAL LAW ENFORCMENT AND SPOTTER REPORTS INDICATED FLASH FLOODING IN BEND. AT HIGHWAY UNDERPASSES WATER IS ALREADY UP TO THE HOODS OF CARS. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. LAT...LON 4414 12140 4401 12123 4408 12108 4422 12128
What forecasters said that day
The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Aug 25, 1:25 PM PDT, 4 hours 31 minutes earlier.
Area forecast discussion, Aug 25, 1:25 PM PDT, 4 hours 31 minutes before
NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION NATIONAL WEATHER SERVICE PENDLETON OR 125 PM PDT SUN AUG 25 2002 SHORT TERM AND FIRE WEATHER...AN UPPER LEVEL SHORT WAVE WILL MOVE ACROSS THE FORECAST AREA THIS AFTERNOON AND TONIGHT. DYNAMIC LIFT AND INSTABILITY ASSOCIATED WITH THE WAVE WILL TRIGGER SCATTERED SHOWERS AND THUNDERSTORMS AS THIS SYSTEM MOVES THROUGH. THE THUNDERSTORMS THIS AFTERNOON AND TONIGHT WILL BE MOSTLY WET AS THE AIR MASS OVER THE AREA IS RATHER MOIST. A WEAK MARINE PUSH WILL BEGIN LATE THIS AFTERNOON ALONG THE EAST SLOPES OF THE CASCADES AND THEN MOVE ACROSS THE REMAINDER OF THE FORECAST AREA THIS EVENING. THIS WILL INCREASE WINDS TONIGHT AND USHER IN A MUCH MORE STABLE AIR MASS FOR MONDAY. THE SHORT WAVE WILL MOVE INTO IDAHO AND MONTANA ON MONDAY WITH NORTHERLY FLOW ALOFT ON THE BACK SIDE OF THE UPPER TROUGH OVER THE FORECAST AREA. ON MONDAY MARGINAL INSTABILITY WILL REMAIN OVER EXTREME NORTHEAST OREGON FOR POSSIBLE ISOLATED THUNDERSTORMS...MAINLY OVER WALLOWA COUNTY. THE UPPER SHORT WAVE WILL STALL OVER MONTANA ON MONDAY BEFORE DIGGING SOUTHWEST INTO IDAHO AND SOUTHEAST OREGON ON TUESDAY. THIS WILL ALLOW SOME WRAP AROUND MOISTURE TO RETURN TO EXTREME EASTERN OREGON FOR SOME SHOWERS AND MOSTLY WET ISOLATED THUNDERSTORMS ON TUESDAY. THE AFOREMENTIONED SHORT WAVE WILL MOVE INTO EASTERN OREGON ON WEDNESDAY FOR A CHANCE OF MAINLY AFTERNOON AND EVENING SHOWERS AND MOSTLY WET THUNDERSTORMS OVER THE MOUNTAINS OF NORTHEAST OREGON. POLAN IN THE EXTENDED...STUBBORN SHORT WAVE/MID LEVEL LOW PRESSURE OVER EASTERN OREGON WILL BEGIN TO WEAKEN AND DRIFT INTO IDAHO THURSDAY. BUT LINGERING MOISTURE REMAINS MAINLY OVER THE EASTERN FORECAST AREA THAT INCLUDES THE BLUE AND WALLOWA MOUNTAINS...WHICH WILL SEE SOME AFTERNOON AND EVENING THUNDERSTORMS. ALSO WITH THE EXITING LOW COMES A LONG WAVE TROUGH ENTERING THE PACIFIC NORTHWEST COAST THURSDAY AFTERNOON AND SOME ISOLATED THUNDERSTORMS MAY DEVELOP OVER THE NORTHERN CASCADES NEAR GOLDENDALE LATE THURSDAY AND INTO THE EVENING. DRIER AIR FILTERS INTO THE CASCADES FRIDAY BUT INSTABILITY PERSISTS OVER THE WALLOWA AND BLUE MOUNTAINS WHERE ISOLATED THUNDERSTORMS ARE POSSIBLE. AS THE TROUGH MOVES EAST AND AWAY FROM THE THE AREA SATURDAY...MUCH DRIER AIR WILL INVADE ALL OF NORTHEAST OREGON AND SOUTHEAST WASHINGTON AND A RETURN TO MOSTLY SUNNY AND WARMER TEMPERATURES ARE LIKELY NEXT WEEKEND. PDT 3000 ALW 3000 PSC 2000 YKM 2000 KPDT...VCP21/PRECIP MODE...OPERATIONAL. .KPDT...NONE.
In the hours before
Local storm report, Aug 25, 4:25 PM PDT, 1 hour 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PENDLETON OREGON
425 PM PDT SUN AUG 25 2002
TIME(PDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0423 PM 8 W CULVER OR .75 INCH HAIL
08/25/02 JEFFERSON 7.5 MILES WEST OF
CULVER AT 4:25 P.M.
REPORTED BY STORM
SPOTTER JE-9.The office that day
Everything else NWS Pendleton, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 5:03 PM PDT | Severe Thunderstorm Warning | PDT | Union | 42 min |
| Aug 25, 5:31 PM PDT | Severe Thunderstorm Warning | PDT | Deschutes | 44 min |
| Aug 25, 5:31 PM PDT | Severe Thunderstorm Warning | PDT | Deschutes | 44 min |
Nearby
Flash Flood Warnings in Oregon, 2002Every flash flood warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.