Alert archive / Washington / Flash Flood Warnings in 1996

Flash Flood Warning 4, NWS Pendleton, OR

April 24, 1996Umatilla County, Oregon; Columbia County, Walla Walla County, Washington

NWS Pendleton, OR issued this flash flood warning at Apr 24, 1996, 7:24 AM PDT for Umatilla County, Oregon; Columbia County, Walla Walla County, Washington. It was in force for 5 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
Apr 24, 1996, 7:24 AM PDT (14:24 UTC)
Expired
Apr 24, 1996, 12:30 PM PDT
In force
5 hr
Issued by
NWS Pendleton, OR
Area
Whole counties

Counties Umatilla County, OR, Columbia County, WA, Walla Walla County, WA

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 2.4 hours before the alert went out and 238 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 12:00Z on 1996-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 54 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 1996-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.1939587897117136156175194214233253272292311330350369389408Sfc1 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
54 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
697 m above ground
0-6 km bulk shear
160 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
-828 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 24, 11:20 AM PDTFlash Flood WarningPDTUmatilla6 hr
Apr 24, 4:55 PM PDTFlash Flood WarningPDTWalla Walla5 hr

Nearby

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

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.