Alert archive / Mississippi / Areal Flood Warnings in 2021

Areal Flood Warning 21, NWS New Orleans, LA

September 1, 2021Harrison County, Jackson County, Mississippi

NWS New Orleans, LA issued this areal flood warning at Sep 1, 2021, 9:49 PM CDT for Harrison County, Jackson County, Mississippi. 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 outline as issued.

The facts

Issued
Sep 1, 2021, 9:49 PM CDT (02:49 UTC)
Expired
Sep 2, 2021, 9:00 AM CDT
In force
11 hr
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Flood severity
None

Counties Harrison County, MS, Jackson County, MS

The radar

The Mobile radar (KMOB), 48 km from the middle of the area, began a volume at 02:50 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 00:00Z, 2.8 hours before the alert went out and 104 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 00:00Z on 2021-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1372 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 00:00Z on 2021-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 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
1372 J/kg
Mixed-layer CIN
-90 J/kg
Mixed-layer LCL
1055 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
-1 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.6

Open this sounding in Storm Lab

The text

As transmitted.

641 
WGUS44 KLIX 020249
FLWLIX

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service New Orleans LA
Issued by National Weather Service Lake Charles LA
949 PM CDT Wed Sep 1 2021

MSC047-059-021400-
/O.NEW.KLIX.FA.W.0021.210902T0249Z-210902T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Harrison MS-Jackson MS-
949 PM CDT Wed Sep 1 2021

The National Weather Service in New Orleans has issued a

* Flood Warning for...
  East Central Harrison County in southern Mississippi...
  Jackson County in southern Mississippi...

* Until 900 AM CDT Thursday.

* At 949 PM CDT, Flooding is ongoing due to heavy rain and surge.

* Some locations that will experience flooding include...
  Biloxi, Ocean Springs, Moss Point, Escatawpa, St. Martin, Gautier, 
  D'iberville, Vancleave, Hickory Hills, Wade, Helena, Big Point, 
  Hurley, Gulf Park Estates, Gulf Hills and Latimer.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3053 8887 3073 8885 3074 8841 3038 8840
      3038 8841 3035 8840 3036 8844 3033 8845
      3032 8850 3035 8851 3035 8858 3037 8859
      3036 8860 3034 8873 3043 8885 3042 8890
      3039 8886 3040 8891

$$

13

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 9:50 PM CDTAreal Flood WarningLIXHancock, Pearl River11 hr

Nearby

Areal Flood Warnings in Mississippi, 2021Every areal flood warning in 2021

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.