Alert archive / Louisiana / Flash Flood Warnings in 2021

Flash Flood Warning 48, NWS New Orleans, LA

June 2, 2021Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Jun 2, 2021, 10:04 PM CDT for Tangipahoa Parish, Louisiana. It was in force for 2 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 2, 2021, 10:04 PM CDT (03:04 UTC)
Expired: Jun 3, 2021, 12:06 AM CDT
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

County Tangipahoa Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.1 hours before the alert went out and 85 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1551 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 864 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

As transmitted.

308 
WGUS54 KLIX 030304
FFWLIX
LAC105-030600-
/O.NEW.KLIX.FF.W.0048.210603T0304Z-210603T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
1004 PM CDT Wed Jun 2 2021

The National Weather Service in New Orleans has issued a

* Flash Flood Warning for...
  Central Tangipahoa Parish in southeastern Louisiana...

* Until 100 AM CDT.

* At 1004 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3.5 inches of 
  rain have fallen. Additional rainfall amounts of 1 to 3 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  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 will experience flash flooding include...
  Amite, Amite City, Independence, Roseland and Wilmer.

This includes the following Interstates...
	Interstate 55 in Louisiana between mile markers 40 and 49.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3082 9046 3086 9031 3085 9031 3085 9030
      3082 9029 3081 9029 3079 9028 3078 9028
      3077 9027 3067 9025 3065 9025 3061 9056
      3074 9057

FLASH FLOOD...RADAR INDICATED

$$

CAB

3 follow-up statements

612 
WGUS74 KLIX 030336
FFSLIX

Flash Flood Statement
National Weather Service New Orleans LA
1036 PM CDT Wed Jun 2 2021

LAC105-030600-
/O.CON.KLIX.FF.W.0048.000000T0000Z-210603T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tangipahoa LA-
1036 PM CDT Wed Jun 2 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1 AM CDT THURSDAY FOR 
CENTRAL TANGIPAHOA PARISH...

At 1036 PM CDT, Doppler radar indicated thunderstorms producing 
heavy rain across the warned area. Between 1 and 4 inches of rain 
have fallen. Additional rainfall amounts of 1 to 2 inches are 
possible in the warned area. Flash flooding is ongoing or expected 
to begin shortly. Activity has slacked off a little but additional 
storms are possible and the warning will remain in effect.

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 will experience flash flooding include...
  Amite, Amite City, Independence, Roseland and Wilmer.

This includes the following Interstates...
	Interstate 55 in Louisiana between mile markers 40 and 49.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3082 9046 3086 9031 3085 9031 3085 9030
      3082 9029 3081 9029 3079 9028 3078 9028
      3077 9027 3067 9025 3065 9025 3061 9056
      3074 9057

FLASH FLOOD...RADAR INDICATED

$$

CAB

120 
WGUS74 KLIX 030435
FFSLIX

Flash Flood Statement
National Weather Service New Orleans LA
1135 PM CDT Wed Jun 2 2021

LAC105-030600-
/O.CON.KLIX.FF.W.0048.000000T0000Z-210603T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tangipahoa LA-
1135 PM CDT Wed Jun 2 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1 AM CDT THURSDAY FOR 
CENTRAL TANGIPAHOA PARISH...

At 1135 PM CDT, Although the rain has moved out of the warned area 
additional storms have developed to the west. This activity has 
tried to move into the warned areas but hasn't been able to yet. 
Because of that we will continue the Flash Flood warning a little 
longer and if this activity looks like it will continue to stay out 
of the warning we will cancel it. Some locations have see more than 
4 inches already tonight and that is on top of the 3 to 6 inches 
from last night.

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 will experience flash flooding include...
  Amite, Amite City, Roseland and Wilmer.

This includes the following Interstates...
	Interstate 55 in Louisiana between mile markers 43 and 47.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3079 9046 3084 9036 3084 9032 3084 9031
      3082 9029 3081 9029 3080 9029 3079 9028
      3078 9028 3077 9027 3073 9029 3070 9033
      3066 9056 3072 9054

FLASH FLOOD...RADAR INDICATED

$$

CAB

225 
WGUS74 KLIX 030506
FFSLIX

Flash Flood Statement
National Weather Service New Orleans LA
1206 AM CDT Thu Jun 3 2021

LAC105-030516-
/O.CAN.KLIX.FF.W.0048.000000T0000Z-210603T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tangipahoa LA-
1206 AM CDT Thu Jun 3 2021

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL TANGIPAHOA PARISH...

The heavy rain has ended and storms to the west have remained west.  
Flooding is no longer expected to pose a threat at this time. Please 
continue to heed remaining road closures.

LAT...LON 3079 9046 3084 9036 3084 9032 3084 9031
      3082 9029 3081 9029 3080 9029 3079 9028
      3078 9028 3077 9027 3073 9029 3070 9033
      3066 9056 3072 9054

$$

CAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 2, 7:01 PM CDT	Special Weather Statement	LIX	Washington	74 min
Jun 2, 9:23 PM CDT	Areal Flood Advisory	LIX	Tangipahoa	41 min
Jun 3, 4:38 PM CDT	Areal Flood Advisory	LIX	Saint Tammany, Tangipahoa	35 min
Jun 3, 4:45 PM CDT	Areal Flood Advisory	LIX	Assumption, Lafourche, Saint James, Saint John the Baptist	104 min

Nearby

Flash Flood Warnings in Louisiana, 2021 Every 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.