Alert archive / Oregon / Flash Flood Warnings in 1997
Flash Flood Warning 43, NWS Pendleton, OR
NWS Pendleton, OR issued this flash flood warning at Jul 30, 1997, 9:24 PM PDT for Morrow County, Umatilla County, Oregon. It was in force for 96 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 30, 1997, 9:24 PM PDT (04:24 UTC)
- Expired
- Jul 30, 1997, 11:00 PM PDT
- In force
- 96 min
- Issued by
- NWS Pendleton, OR
- Area
- Whole counties
Counties Morrow County, OR, Umatilla County, OR
The nearest sounding before it
Salem/Mcnary, OR (KSLE), launched 00:00Z, 4.4 hours before the alert went out and 308 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
- 1768 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPDT 310428 FFWPDT ORC049-059-310600- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PENDLETON OR 924 PM PDT WED JUL 30 1997 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN UMATILLA COUNTY UNTIL 1100 PM PDT... ...THE FLASH FLOOD WARNING IS NO LONGER IN EFFECT FOR SOUTHEASTERN MORROW COUNTY... THUNDERSTORMS THAT PRODUCED HEAVY RAIN IN SOUTHEASTERN MORROW COUNTY HAVE DECREASED IN INTENSITY WITH FLOODING NO LONGER A THREAT. HOWEVER...THUNDERSTORMS CONTINUE TO REMAIN STRONG IN NORTHERN UMATILLA COUNTY WHERE FLASH FLOODING IS STILL IMMINENT. 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. SMITH
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 Jul 30, 8:30 PM PDT, 54 minutes earlier.
Area forecast discussion, Jul 30, 8:30 PM PDT, 54 minutes before
NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION NATIONAL WEATHER SERVICE PENDLETON OR 830 PM PDT WED JUL 30 1997 HAS BEEN AN EXCITING NGT WITH PLENTY OF WRNG ISSUED. CNVCNTN CONTG THRU THE EVNG FROM CENT ORE INTO THE FOOTHILLS OF THE BLUE AND SPRDG INTO SE WASH AND SRN FLANK OF HORSE HEAVENS. COVERAGE MAY BE DECRSG BUT SOME STG CELLS ARE MOVG THRU LOWER COL BASIN AND FOOTHILLS. SPOTTER CONFIRMED PLENTY OF HAILS WITH SOME REACHING SVR LIMITS. XPCT SHWRS TO CONT LATE INTO THE NGT AND WL MENTION CHC OF TS AS WELL. DONT SEE MAJ CHGS TO E SIDE WITH H5 TROF REMAINING OFSHR AND SW FLO CONTG THRU FCST PERIOD. MDLS INDICATE SOME LO LVL CAA BUT BULK OF CAA GOES N OF CWA. WILL MENTION CHC OF TS THRU FCST PERIOD. FB PDT 7342 ALW 7342 PSC 6232 YKM 6232 .KPDT...VCP11/CSR21...OPERATIONAL. .KPDT...NONE.
The office that day
Everything else NWS Pendleton, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 5:06 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla | 69 min |
| Jul 30, 5:29 PM PDT | Severe Thunderstorm Warning | PDT | Wasco | 2 hr |
| Jul 30, 6:05 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla | 55 min |
| Jul 30, 6:41 PM PDT | Severe Thunderstorm Warning | PDT | Morrow, Umatilla | 64 min |
| Jul 30, 7:22 PM PDT | Severe Thunderstorm Warning | PDT | Wasco | 68 min |
| Jul 30, 7:49 PM PDT | Severe Thunderstorm Warning | PDT | Morrow, Umatilla | 56 min |
| Jul 30, 8:30 PM PDT | Flash Flood Warning | PDT | Morrow, Umatilla | 60 min |
| Jul 31, 2:50 PM PDT | Severe Thunderstorm Warning | PDT | Crook, Deschutes | 40 min |
| Jul 31, 3:15 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla, Union | 45 min |
| Jul 31, 3:30 PM PDT | Severe Thunderstorm Warning | PDT | Crook, Jefferson | 60 min |
| Jul 31, 4:00 PM PDT | Severe Thunderstorm Warning | PDT | Umatilla, Union | 60 min |
Nearby
Flash Flood Warnings in Oregon, 1997Every 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.