Alert archive / Missouri / Flash Flood Warnings in 1990

Flash Flood Warning 15, NWS St. Louis, MO

June 6, 1990Jefferson County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 6, 1990, 11:15 AM CDT for Jefferson County, Missouri. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 6, 1990, 11:15 AM CDT (16:15 UTC)
Expired
Jun 6, 1990, 2:30 PM CDT
In force
3 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

County Jefferson County, MO

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

Paducah/Barkley, KY (KPAH), launched 12:00Z, 4.3 hours before the alert went out and 209 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, Paducah/Barkley, KY at 12:00Z on 1990-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 154 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, Paducah/Barkley, KY at 12:00Z on 1990-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
154 J/kg
Mixed-layer CIN
-506 J/kg
Mixed-layer LCL
1005 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
60 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 St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 6, 10:37 AM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson28 min
Jun 6, 10:54 AM CDTSevere Thunderstorm WarningLSXWashington36 min
Jun 6, 11:15 AM CDTFlash Flood WarningLSXSaint Louis, City of Saint Louis3 hr
Jun 6, 11:15 AM CDTFlash Flood WarningLSXFranklin, Lincoln, Saint Charles, Warren3 hr

Nearby

Flash Flood Warnings in Missouri, 1990Every flash flood 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.