Alert archive / Washington / Flash Flood Warnings in 1993

Flash Flood Warning 1, NWS Seattle, WA

May 31, 1993Chelan County, Washington

NWS Seattle, WA issued this flash flood warning at May 31, 1993, 3:23 PM PDT for Chelan County, Washington. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
May 31, 1993, 3:23 PM PDT (22:23 UTC)
Expired
May 31, 1993, 5:30 PM PDT
In force
2 hr
Issued by
NWS Seattle, WA
Area
Whole counties

County Chelan County, WA

The nearest sounding before it

Spokane Intl Airport, WA (KGEG), launched 12:00Z, 10.4 hours before the alert went out and 235 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 Intl Airport, WA at 12:00Z on 1993-05-31Temperature 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 Intl Airport, WA at 12:00Z on 1993-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 206 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
1796 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
206 m²/s²
0-3 km storm-relative helicity
266 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.

The office that day

Everything else NWS Seattle, WA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 31, 3:46 PM PDTFlash Flood WarningSEWDouglas119 min
May 31, 4:55 PM PDTFlash Flood WarningSEWChelan, Douglas2 hr

Nearby

Flash Flood Warnings in Washington, 1993Every flash flood warning in 1993

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.