Alert archive / Missouri / Flash Flood Warnings in 1991

Flash Flood Warning 18, NWS St. Louis, MO

July 11, 1991Pike County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jul 11, 1991, 4:00 AM CDT for Pike County, Missouri. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jul 11, 1991, 4:00 AM CDT (09:00 UTC)
Expired
Jul 11, 1991, 7:00 AM CDT
In force
3 hr
Issued by
NWS St. Louis, MO
Area
Whole counties

County Pike County, MO

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 00:00Z, 9.0 hours before the alert went out and 332 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 00:00Z on 1991-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 943 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 00:00Z on 1991-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.1939Sfc1 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
943 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
979 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
161 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

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
Jul 11, 4:00 AM CDTFlash Flood WarningLSXMonroe, Shelby3 hr
Jul 11, 5:35 AM CDTFlash Flood WarningLSXLincoln3 hr
Jul 11, 7:07 AM CDTFlash Flood WarningLSXPike3 hr
Jul 11, 7:07 AM CDTFlash Flood WarningLSXMonroe3 hr
Jul 11, 5:42 PM CDTSevere Thunderstorm WarningLSXKnox48 min
Jul 11, 5:52 PM CDTSevere Thunderstorm WarningLSXSchuyler, Scotland36 min
Jul 11, 6:32 PM CDTSevere Thunderstorm WarningLSXKnox43 min

Nearby

Flash Flood Warnings in Missouri, 1991Every flash flood warning in 1991

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.