Alert archive / Washington / Flash Flood Warnings in 1997

Flash Flood Warning 44, NWS Pendleton, OR

July 30, 1997Columbia County, Franklin County, Walla Walla County, Washington

NWS Pendleton, OR issued this flash flood warning at Jul 30, 1997, 9:38 PM PDT for Columbia County, Franklin County, Walla Walla County, Washington. It was in force for 82 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, 9:38 PM PDT (04:38 UTC)
Expired
Jul 30, 1997, 11:00 PM PDT
In force
82 min
Issued by
NWS Pendleton, OR
Area
Whole counties

Counties Columbia County, WA, Franklin County, WA, Walla Walla County, WA

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 4.6 hours before the alert went out and 215 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-pSkew-T log-p diagram, Spokane, WA at 00:00Z on 1997-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 00:00Z on 1997-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2452 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, 1 hour 8 minutes earlier.

Area forecast discussion, Jul 30, 8:30 PM PDT, 1 hour 8 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.

IssuedProductOfficeCountiesLasted
Jul 30, 5:06 PM PDTSevere Thunderstorm WarningPDTUmatilla69 min
Jul 30, 5:29 PM PDTSevere Thunderstorm WarningPDTWasco2 hr
Jul 30, 6:05 PM PDTSevere Thunderstorm WarningPDTUmatilla55 min
Jul 30, 6:41 PM PDTSevere Thunderstorm WarningPDTMorrow, Umatilla64 min
Jul 30, 7:22 PM PDTSevere Thunderstorm WarningPDTWasco68 min
Jul 30, 7:49 PM PDTSevere Thunderstorm WarningPDTMorrow, Umatilla56 min
Jul 30, 8:30 PM PDTFlash Flood WarningPDTMorrow, Umatilla60 min
Jul 30, 9:24 PM PDTFlash Flood WarningPDTMorrow, Umatilla96 min
Jul 31, 2:50 PM PDTSevere Thunderstorm WarningPDTCrook, Deschutes40 min
Jul 31, 3:15 PM PDTSevere Thunderstorm WarningPDTUmatilla, Union45 min
Jul 31, 3:30 PM PDTSevere Thunderstorm WarningPDTCrook, Jefferson60 min
Jul 31, 4:00 PM PDTSevere Thunderstorm WarningPDTUmatilla, Union60 min
Jul 30, 6:54 PM PDTSevere Thunderstorm WarningPDTColumbia, Walla Walla51 min
Jul 30, 6:58 PM PDTSevere Thunderstorm WarningPDTColumbia, Walla Walla47 min
Jul 30, 8:55 PM PDTFlash Flood WarningPDTBenton, Franklin, Walla Walla2 hr
Jul 30, 9:38 PM PDTSevere Thunderstorm WarningPDTColumbia, Franklin, Walla Walla82 min

Nearby

Flash Flood Warnings in Washington, 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.