Alert archive / Louisiana / Freeze Warnings in 2023

Freeze Warning 2, NWS New Orleans, LA

March 18, 202316 parishes in Louisiana; 8 counties in Mississippi

NWS New Orleans, LA issued this freeze warning at Mar 18, 2023, 2:41 PM CDT for 16 parishes in Louisiana; 8 counties in Mississippi. It took effect at Mar 19, 2023, 10:00 PM CDT. It was in force for 11 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Mar 18, 2023, 2:41 PM CDT (19:41 UTC)
In effect from
Mar 19, 2023, 10:00 PM CDT
Expired
Mar 20, 2023, 9:16 AM CDT
In force
11 hr
Issued by
NWS New Orleans, LA
All 24 counties

Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Livingston Parish, LA, Plaquemines Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.7 hours before the alert went out and 84 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 2023-03-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2023-03-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -227 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1536 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
-227 m²/s²
0-3 km storm-relative helicity
22 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
Mar 18, 3:10 AM CDTFreeze WatchLIXAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 8 more12 hr
Mar 18, 3:11 AM CDTSmall Craft AdvisoryLIX34 hr
Mar 18, 3:10 AM CDTFreeze WatchLIXAmite, Pike, Walthall, Wilkinson10 hr
Mar 18, 12:40 PM CDTFreeze WarningLIXAmite, Pike, Walthall, Wilkinson20 hr

Nearby

Freeze Warnings in Louisiana, 2023Freeze Warnings in Mississippi, 2023Every freeze warning in 2023

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.