Alert archive / Texas / Flash Flood Watches in 2018

Flash Flood Watch 7, NWS Lake Charles, LA

September 11, 2018Hardin County, Texas

NWS Lake Charles, LA issued this flash flood watch at Sep 11, 2018, 4:14 AM CDT for Hardin County, Texas. It took effect at Sep 11, 2018, 5:00 AM CDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Sep 11, 2018, 4:14 AM CDT (09:14 UTC)
In effect from
Sep 11, 2018, 5:00 AM CDT
Expired
Sep 11, 2018, 2:56 PM CDT
In force
10 hr
Issued by
NWS Lake Charles, LA
Flood severity
None

County Hardin County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 9.2 hours before the alert went out and 117 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, Lake Charles Mun, LA at 00:00Z on 2018-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 508 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, Lake Charles Mun, LA at 00:00Z on 2018-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 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
508 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
708 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
38 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 11, 9:15 AM CDTAreal Flood AdvisoryLCHJefferson2 hr
Sep 11, 11:37 AM CDTAreal Flood AdvisoryLCHJefferson, Orange3 hr

Nearby

Flash Flood Watches in Texas, 2018Every flash flood watch in 2018

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.