Alert archive / Oregon / Flash Flood Warnings in 1997

Flash Flood Warning 5, NWS Pendleton, OR

January 1, 1997Union County, Wallowa County, Oregon

NWS Pendleton, OR issued this flash flood warning at Jan 1, 1997, 9:17 AM PST for Union County, Wallowa County, Oregon. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 1, 1997, 9:17 AM PST (17:17 UTC)
Expired: Jan 1, 1997, 4:00 PM PST
In force: 7 hr
Issued by: NWS Pendleton, OR
Area: Whole counties

Counties Union County, OR, Wallowa County, OR

The nearest sounding before it

Boise Airport, ID (KBOI), launched 12:00Z, 5.3 hours before the alert went out and 236 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1742 m above ground
0-6 km bulk shear: 92 kt
0-1 km storm-relative helicity: 412 m²/s²
0-3 km storm-relative helicity: 511 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPDT 011719
FFWPDT
ORC061-063-020015-
 
BULLETIN
SMALL STREAM FLOOD WARNING
NATIONAL WEATHER SERVICE PENDLETON OR
917 AM PST WED JAN 1 1997
 
THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A
SMALL STREAM FLOOD WARNING EFFECTIVE UNTIL  400 PM PST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST OREGON
 
   ...UNION COUNTY...WALLOWA COUNTY
 
AT 9:10 AM...UNION COUNTY OFFICIALS REPORTED SMALL STREAM FLOODING ALONG
HIGHWAY 244 BETWEEN HILGARD AND UKIAH. SEVERAL SMALL PRIVATE BRIDGES
ALONG THE STREAMS WERE REPORTEDLY UNDER WATER.
 
OTHER SMALL STREAMS IN UNION AND WALLOWA COUNTIES WILL LIKELY INUNDATE
ROADS AND MAY WASH OUT SMALL BRIDGES.
 
DRIVING THROUGH FLOODED AREAS IS A MAJOR CAUSE OF FLOOD FATALITIES.  DO
NOT DRIVE THROUGH ANY AREA WHERE WATER COVERS THE ROAD.
 
DOHERTY
 
 
&

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 Jan 1, 8:30 AM PST, 47 minutes earlier.

Area forecast discussion, Jan 1, 8:30 AM PST, 47 minutes before

NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
830 AM PST WED JAN 1 1997

150+KT JET OVR ORE QCKLY PUSHED LOW TWRDS VCVR ISLD THIS MORN WITH
FRNTL PSTN VCNTY OF SERN ORE.  RNFALL AMTS HVY OVR BLUES WITH MEH
REPORTING 0.65 INCHES IN 3 HR PD.  WITH HI SNOW LVLS AND RAIN
OVRNGT...FLOODING AND MUDSLIDES TO CONT.  H20 VPR LOOPS SHOW ANTHR
WAVE DVLPG NEAR 40/130.  SW FLOW ALF AND SUBTPCL TAP WILL CONT
THREAT OF MORE RNFALL AS THIS VORT MAX PASSES THRU. SINCE FROPA
OCCURRED ERLR THIS AM...HAVE LWRD POPS FOR BASIN AND FTHILLS TDY.
12Z MODELS SIMILAR AT BRINGING NXT SYS TO CST LATE THU AND E OF
CASCDS FRI.  SNOW LVLS TO DCRS BY FRI MORN WHICH SHUD PUT AN END TO
RUNOFF.  NGM COOLER THAN ETA BY DROPPING THCKSS DOWN TO 527DM FRI
AM.  THIS WUD LWR SNOW LVLS DOWN TO BASIN FLOOR.  WILL TAKE A CLSR
LUK AT NEW RUNS BFR DECIDING PCPN TYPE FOR BASIN/FTHILLS.  SMITH

PDT 6446  ALW 6446  PSC 5334  YKM 6445

.PDT...SEE FFWPDT...FLSPDX AND FLWSEA FOR FLOOD
WRNGS/WATCHES/ADVYS.

.KPDT...VCP 21/CSR-21...OPERATIONAL.

The office that day

Everything else NWS Pendleton, OR issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 1, 7:07 AM PST	Flash Flood Warning	PDT	Morrow, Umatilla	7 hr
Jan 1, 7:07 AM PST	Flash Flood Warning	PDT	Wheeler	7 hr
Jan 1, 10:13 AM PST	Flash Flood Warning	PDT	Gilliam, Sherman	6 hr
Jan 1, 10:13 AM PST	Flash Flood Warning	PDT	Grant	6 hr
Jan 1, 2:01 PM PST	Flash Flood Warning	PDT	Umatilla	2 hr
Jan 1, 2:01 PM PST	Flash Flood Warning	PDT	Wheeler	2 hr

Nearby

Flash Flood Warnings in Oregon, 1997 Every flash flood warning in 1997

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.