Alert archive / Washington / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 4, NWS Seattle, WA

September 9, 1994Snohomish County, Washington

NWS Seattle, WA issued this severe thunderstorm warning at Sep 9, 1994, 7:04 PM PDT for Snohomish County, Washington. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Sep 9, 1994, 7:04 PM PDT (02:04 UTC)
Expired
Sep 9, 1994, 8:00 PM PDT
In force
56 min
Issued by
NWS Seattle, WA
Area
Whole counties

County Snohomish County, WA

The nearest sounding before it

Spokane Intl Airport, WA (KGEG), launched 00:00Z, 2.1 hours before the alert went out and 318 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 00:00Z on 1994-09-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 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 Intl Airport, WA at 00:00Z on 1994-09-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.19395878Sfc1 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
13 J/kg
Mixed-layer CIN
-219 J/kg
Mixed-layer LCL
962 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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The text

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

Nearby

Severe Thunderstorm Warnings in Washington, 1994Every severe thunderstorm warning in 1994

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.