Alert archive / California / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 1, NWS Sacramento, CA

April 23, 1990Amador County, El Dorado County, Sacramento County, California

NWS Sacramento, CA issued this severe thunderstorm warning at Apr 23, 1990, 5:09 PM PDT for Amador County, El Dorado County, Sacramento County, California. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Apr 23, 1990, 5:09 PM PDT (00:09 UTC)
Expired
Apr 23, 1990, 6:15 PM PDT
In force
66 min
Issued by
NWS Sacramento, CA
Area
Whole counties

Counties Amador County, CA, El Dorado County, CA, Sacramento County, CA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Oakland, CA (KOAK), launched 00:00Z, 0.2 hours before the alert went out and 150 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, Oakland, CA at 00:00Z on 1990-04-24Temperature 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, Oakland, CA at 00:00Z on 1990-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 square meters per square second.1939587897117136Sfc1 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
1030 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
123 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 Sacramento, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 23, 5:09 PM PDTFlash Flood WarningSTOAmador, El Dorado, Sacramento66 min

Nearby

Severe Thunderstorm Warnings in California, 1990Every severe thunderstorm warning in 1990

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.