Flash Flood Warning 13, NWS Pendleton, OR

Issued

Nov 19, 1996, 3:45 AM PST (11:45 UTC)

Expired

Nov 19, 1996, 8:00 AM PST

In force

4 hr

Issued by

NWS Pendleton, OR

Area

Whole counties

Counties Grant County, OR, Morrow County, OR, Umatilla County, OR

000 
TTAA00 KPDT 191149
FFWPDT
ORC013-017-069-023-049-059-191630-
 
URBAN AND SMALL STREAM FLOOD WARNING
NATIONAL WEATHER SERVICE PENDLETON OR
345 AM PST TUE NOV 19 1996
 
THE NATIONAL WEATHER SERVICE IN PENDLETON EXTENDED A
SMALL STREAM FLOOD WARNING EFFECTIVE UNTIL 800 AM PST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
   ...CROOK COUNTY...DESCHUTES COUNTY...WHEELER COUNTY...GRANT COUNTY
 
AND HAS EXPANDED THE WARNING TO INCLUDE
   ...FAR SOUTHEASTERN MORROW COUNTY AND...
      SOUTHEASTERN UMATILLA COUNTY...
 
...A SNOW ADVISORY REMAINS IN EFFECT THIS MORNING FOR
   THE BASIN AND FOOTHILLS...
...A WINTER STORM WARNING FOR HEAVY SNOW REMAINS IN EFFECT
   THIS MORNING FOR THE BLUE MOUNTAINS...
 
IN THE PAST 18 HOURS MANY AREAS IN THE COLUMBIA BASIN...AND IN
THE OCHOCOS THROUGH THE STRAWBERRYS AND INTO THE BLUE MOUNTAINS
HAVE RECEIVED SNOWFALL AND RAIN.  SPOTTER REPORTS INDICATED
4 INCHES IN GRANT COUNTY...8 INCHES IN THE DALLES AND ONE FOOT
OF SNOW AT SPOUT SPRINGS IN UMATILLA COUNTY.
 
SOME AREAS HAVE ALSO RECORDED HEAVY RAIN OR HEAVY SNOW AT TIMES.
SATELLITE IMAGERY SHOWS THE BACK EDGE OF THE PRECIPITATION
APPROACHING THE COAST.  A LOW PRESSURE AREA ABOUT 200 MILES
OFF THE NORTHERN CALIFORNIA COAST MOVES TOWARD SPOKANE FOR THIS
EVENING.  AS THE LOW PRESSURE AREA TREKS INLAND...GUSTY SOUTHWEST
WINDS AHEAD OF THE LOW WILL BRING IN WARM AIR.  AT 300 AM MEDFORD
OREGON REPORTED 61 DEGREES...KLAMATH FALLS 50 DEGREES AND
GUSTY WINDS TO 30 MPH WHILE REDMOND HAD 34 DEGREES AND LIGHT WINDS.
 
LATE THIS MORNING AND EARLY AFTERNOON THIS WARM AIR WILL MOVE OVER
THE VERY WET AND NEW SNOWFALL IN CENTRAL OREGON THROUGH BAKER AND
MUCH OF THE SNOW IS EXPECTED TO MELT.  THE MELTING SNOW IS EXPECTED
TO BRING QUICK RISES TO STREAMS AND CREEKS AND LOW LYING AREAS
WILL LIKELY FLOOD AS A RESULT.
 
OTHER AREAS SUCH AS WALLOWA COUNTY WHICH RECEIVED 1 TO 2 FEET OF SNOW
WILL LIKELY /NOT/ BE IN THE WARM AIR LONG ENOUGH TO MELT THEIR MORE
SIGNIFICANT SNOWS.  HIGHS IN THE WALLOWAS ARE ONLY EXPECTED TO BE
IN THE UPPER 30S.
 
IF YOU OBSERVE FLOODING SEEK HIGHER GROUND QUICKLY.  NEVER DRIVE
A VEHICLE THROUGH RAPIDLY MOVING WATER.
 
STAY TUNED TO NOAA WEATHER RADIO OR LOCAL MEDIA FOR UPDATES.
 
VJT

NWS Pendleton, OR wrote its last area forecast discussion before this flash flood warning went out at Nov 19, 1:46 AM PST, 1 hour 59 minutes earlier.

NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
145 AM PST TUE NOV 19 1996

FOR TODAY...MIXED RAIN AND SNOW IN THE HOME ZONES IS FCST TO TURN
TO SCATTERED MAINLY MOUNTAIN SNOW SHOWERS AROUND 21Z.  IN THE MID
DAY HOWEVER A WARMUP TO THE 40S FOR THE BASIN AND FOOTHILLS...50S
IN CENTRAL OREG AND 60S IN SE OREG...WILL ASSIST SOME SNOW MELT
FROM OCHOCOS TO BAKER CO.  WALLOWA CO OREG INTO COLUMBIA CO WASH
SHOULD STAY IN THE U30S AND WITH 1-2 FEET OF SNOWFALL LITTLE MELT
IS EXPECTED.  SO FFS LOOKS BEST ACROSS ORZONES 017>020 EXCEPT
WALLOWA CO.  CALLS TO SHERIFFS IN FFS AREA OF CENTRAL OREG
INDICATED RISES ON CREEKS BUT NO DMMG OR FLOODING. WOULD LIKE TO
KEEP FFS UP UNTIL 15Z FROM GRANT CO THROUGH BAKER CO BECAUSE THE
EXPECTED LATE MORNING RAIN AND MID DAY WARM UP TO AROUND 50. THE
COMBO SHOULD MELT SNOW AND BRING QUICK RISES TO STREAMS FOR
PORTIONS OF THE HOME ZONES.
BY COUNTY...DESCHUTES...CROOK...WHEELER...GRANT...BAKER.
SRN MORROW AND SE UMATILLA.

GUSTY SW WINDS IN EXPOSED LOCATIONS OF 40-50KTS ARE LIKELY AHEAD OF
THE WARM FNT ESPECIALY FROM THE OCHOCOS/STRAWBERRYS THROUGH THE
BLUES AND INTO BAKER CO. FOR THE FOOTHILLS...20G30 IN THE MID DAY
IS EXPECTED.

SATL IMAGERY AT 830Z BEGINNING TO SHOW AMPLIFICATION AND SHORTENING
OF THE WAVELENGTH ASSOCIATED WITH PAC NW RAIN/SNOW AND WIND STORM
WHILE COLD ARCTIC AIR REMAINS ENTRENCHED OVER MONT AND CAN.  SO
AGREE WITH 00Z RUNS THAT TIL 00Z THE SFC LOW WILL MOVE ENE...REFORM
AROUND SNAKE/COLUMBIA CONFLUENCE AREA THEN AFT 00Z BE SHUNTED
SEWARD THROUGH NRN WYO.  TROPICAL MOISTURE SOURCE DECREASING WHILE
WESTERN EDGE OF BAROCLINIC ZONE ESTIMATED TO ALONG THE EAST SLOPES
OF THE OREG CASCADES BY 15-16Z.  THOMPSON

PDT +413 ALW +413 PSC +412 YKM +211

.KPDT...VCP 11/CSR 31...OPERATIONAL.

.PDT...WSW...ADVY TIL 18Z FOR ORZ16>18-ORZ020 HEAVY SNOW WARNING
       FOR ORZ019-WAZ030.
       FFW...URBAN/SMALL STRM FLOOVD WARNING BY COUNTY...
       DESCHUTES...CROOK...WHEELER...GRANT...BAKER.
       SRN MORROW AND SE UMATILLA.

Flash Flood Warnings in Oregon, 1996Every flash flood warning in 1996

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.