Alert archive / Mississippi / Flash Flood Warnings in 2021

Flash Flood Warning 49, NWS New Orleans, LA

June 6, 2021Pike County, Walthall County, Mississippi; Tangipahoa Parish, Washington Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Jun 6, 2021, 11:58 AM CDT for Pike County, Walthall County, Mississippi; Tangipahoa Parish, Washington Parish, Louisiana. It was in force for 3 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
Jun 6, 2021, 11:58 AM CDT (16:58 UTC)
Expired
Jun 6, 2021, 2:47 PM CDT
In force
3 hr
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Flood severity
None

Counties Tangipahoa Parish, LA, Washington Parish, LA, Pike County, MS, Walthall County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.0 hours before the alert went out and 101 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 2021-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1791 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 2021-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 181 square meters per square second.19395878Sfc1 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
1791 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
571 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
181 m²/s²
0-3 km storm-relative helicity
240 m²/s²
Significant tornado parameter
1.4
Supercell composite
9.7

Open this sounding in Storm Lab

The text

As transmitted.

494 
WGUS54 KLIX 061658
FFWLIX
LAC105-117-MSC113-147-062000-
/O.NEW.KLIX.FF.W.0049.210606T1658Z-210606T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
1158 AM CDT Sun Jun 6 2021

The National Weather Service in New Orleans has issued a

* Flash Flood Warning for...
  Northern Tangipahoa Parish in southeastern Louisiana...
  Northwestern Washington Parish in southeastern Louisiana...
  Southeastern Pike County in southern Mississippi...
  Southwestern Walthall County in southern Mississippi...

* Until 300 PM CDT.

* At 1158 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. And additional storms could produce another 1 to 2 
  inches in 1 hour.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that could experience flash flooding include...
  Amite, Amite City, Kentwood, Roseland, Osyka, Mount Herman, Wilmer 
  and Tangipahoa.

This includes the following Interstates...
	Interstate 55 in Louisiana between mile markers 45 and 63.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3101 9048 3114 9039 3115 9026 3105 9009
      3100 9011 3071 9027 3068 9054 3094 9054

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

DM
1 follow-up statement
193 
WGUS74 KLIX 061947
FFSLIX

Flash Flood Statement
National Weather Service New Orleans LA
247 PM CDT Sun Jun 6 2021

LAC105-117-MSC113-147-061957-
/O.CAN.KLIX.FF.W.0049.000000T0000Z-210606T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tangipahoa LA-Washington LA-Pike MS-Walthall MS-
247 PM CDT Sun Jun 6 2021

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN PIKE AND 
SOUTHWESTERN WALTHALL COUNTIES AND NORTHERN TANGIPAHOA AND 
NORTHWESTERN WASHINGTON PARISHES...

The heavy rain has ended. Flooding is no longer expected to pose an 
immediate threat. Please continue to heed any remaining road 
closures.

A Flash Flood Watch remains in effect until 700 PM CDT for portions 
of southeast Louisiana and Mississippi.

LAT...LON 3101 9048 3114 9039 3115 9026 3105 9009
      3100 9011 3071 9027 3068 9054 3094 9054

$$

DM

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 10:23 AM CDTRiver Flood WarningLIXHarrison47 hr
Jun 6, 10:26 AM CDTRiver Flood WarningLIXHarrison39 hr
Jun 6, 10:52 AM CDTRiver Flood WarningLIXHarrison30 hr
Jun 6, 2:48 PM CDTRiver Flood WarningLIXPike41 hr
Jun 6, 4:30 PM CDTSpecial Weather StatementLIXHarrison30 min
Jun 6, 8:25 AM CDTSpecial Marine WarningLIX95 min
Jun 6, 8:27 AM CDTSpecial Marine WarningLIX34 min
Jun 6, 9:07 AM CDTTornado WarningLIXAscension, Livingston, Saint James, Tangipahoa14 min
Jun 6, 9:23 AM CDTTornado Warning Tornado observedLIXPlaquemines23 min
Jun 6, 9:57 AM CDTSpecial Weather StatementLIXPlaquemines33 min
Jun 6, 10:01 AM CDTTornado WarningLIXPlaquemines32 min
Jun 6, 10:14 AM CDTSpecial Marine WarningLIX91 min
Jun 6, 10:26 AM CDTSpecial Marine WarningLIX64 min
Jun 6, 10:38 AM CDTSpecial Weather StatementLIXPlaquemines52 min
Jun 6, 10:46 AM CDTAreal Flood AdvisoryLIXAscension, East Baton Rouge, Iberville, West Baton Rouge4 hr
Jun 6, 11:28 AM CDTSpecial Marine WarningLIX32 min
Jun 6, 11:32 AM CDTSpecial Weather StatementLIXSaint Bernard43 min
Jun 6, 11:44 AM CDTSpecial Marine WarningLIX61 min
Jun 6, 11:51 AM CDTAreal Flood AdvisoryLIXAscension, East Baton Rouge, Iberville, Livingston, Tangipahoa3 hr
Jun 6, 12:22 PM CDTSpecial Marine WarningLIX23 min
Jun 6, 12:46 PM CDTSpecial Weather StatementLIXLafourche29 min
Jun 6, 12:53 PM CDTSpecial Weather StatementLIXTangipahoa52 min
Jun 6, 12:57 PM CDTSpecial Marine WarningLIX63 min
Jun 6, 1:52 PM CDTSpecial Marine WarningLIX23 min
Jun 6, 1:59 PM CDTSpecial Marine WarningLIX61 min
Jun 6, 2:15 PM CDTSpecial Marine WarningLIX45 min
Jun 6, 3:01 PM CDTSpecial Marine WarningLIX59 min
Jun 6, 3:07 PM CDTSpecial Marine WarningLIX53 min
Jun 6, 3:22 PM CDTSpecial Marine WarningLIX38 min
Jun 6, 3:41 PM CDTSpecial Marine WarningLIX19 min
Jun 6, 3:59 PM CDTSpecial Marine WarningLIX61 min
Jun 6, 4:39 PM CDTSpecial Marine WarningLIX31 min
Jun 6, 4:52 PM CDTSpecial Marine WarningLIX83 min
Jun 6, 5:36 PM CDTSpecial Marine WarningLIX39 min

Nearby

Flash Flood Warnings in Mississippi, 2021Flash Flood Warnings in Louisiana, 2021Every flash 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.