Alert archive / Louisiana / Flash Flood Watches in 2019

Flash Flood Watch 8, NWS Lake Charles, LA

July 10, 201910 parishes in Louisiana; 4 counties in Texas

NWS Lake Charles, LA issued this flash flood watch at Jul 10, 2019, 6:34 PM CDT for 10 parishes in Louisiana; 4 counties in Texas. It took effect at Jul 12, 2019, 7:00 AM CDT. It was in force for 4 days.

The area

The counties it named.

The facts

Issued
Jul 10, 2019, 6:34 PM CDT (23:34 UTC)
In effect from
Jul 12, 2019, 7:00 AM CDT
Expired
Jul 15, 2019, 7:00 PM CDT
In force
4 days
Issued by
NWS Lake Charles, LA
Flood severity
None

Counties Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Lafayette Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Vernon Parish, LA, Hardin County, TX, Jasper County, TX, Newton County, TX, Tyler County, TX

The radar

The Ft Polk radar (KPOE), 58 km from the middle of the area, began a volume at 23:35 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.6 hours before the alert went out and 317 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, Slidell Radar S, LA at 12:00Z on 2019-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1807 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, Slidell Radar S, LA at 12:00Z on 2019-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
1807 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
1007 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
43 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.4

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 3:00 PM CDTSpecial Weather StatementLCHAcadia, Allen, Evangeline, Rapides, Saint Landry75 min
Jul 10, 4:36 PM CDTHurricane WatchLCHCameron, Saint Martin3 days
Jul 10, 4:36 PM CDTStorm Surge WatchLCH30 hr
Jul 10, 6:14 PM CDTSpecial Weather StatementLCHSt. Mary61 min

Nearby

Flash Flood Watches in Louisiana, 2019Flash Flood Watches in Texas, 2019Every flash flood watch in 2019

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; radar from the NEXRAD Level II archive.