Alert archive / Louisiana / Coastal Flood Statements in 2019

Coastal Flood Statement 1, NWS New Orleans, LA

September 20, 2019Saint Bernard Parish, Saint John the Baptist Parish, Louisiana

NWS New Orleans, LA issued this coastal flood statement at Sep 20, 2019, 4:07 PM CDT for Saint Bernard Parish, Saint John the Baptist Parish, Louisiana. It took effect at Sep 20, 2019, 6:00 PM CDT. It was in force for 42 hr.

The area

The counties it named.

The facts

Issued
Sep 20, 2019, 4:07 PM CDT (21:07 UTC)
In effect from
Sep 20, 2019, 6:00 PM CDT
Expired
Sep 22, 2019, 12:00 PM CDT
In force
42 hr
Issued by
NWS New Orleans, LA

Counties Saint Bernard Parish, LA, Saint John the Baptist Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.1 hours before the alert went out and 294 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 12:00Z on 2019-09-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2552 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 12:00Z on 2019-09-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 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
2552 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
495 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 19, 7:51 PM CDTAreal Flood AdvisoryLIXEast Baton Rouge, East Feliciana, Pointe Coupee, West Baton Rouge, West Feliciana114 min
Sep 19, 11:27 PM CDTSpecial Marine WarningLIX33 min
Sep 20, 10:36 AM CDTSmall Craft AdvisoryLIX41 hr
Sep 19, 7:19 PM CDTAreal Flood AdvisoryLIXAmite, Wilkinson116 min

Nearby

Coastal Flood Statements in Louisiana, 2019Coastal Flood Statements in Mississippi, 2019Every coastal flood statement 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.