Alert archive / Louisiana / Flash Flood Warnings in 2022

Flash Flood Warning 30, NWS New Orleans, LA

May 25, 2022Saint Charles Parish, Saint John the Baptist Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at May 25, 2022, 12:03 PM CDT for Saint Charles Parish, Saint John the Baptist Parish, Louisiana. It was in force for 4 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: May 25, 2022, 12:03 PM CDT (17:03 UTC)
Expired: May 25, 2022, 4:15 PM CDT
In force: 4 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.1 hours before the alert went out and 73 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: 2556 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 567 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 12.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before this flash flood warning went out at May 25, 9:57 AM CDT, 2 hours 6 minutes earlier.

Area forecast discussion, May 25, 9:57 AM CDT, 2 hours 6 minutes before

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In the hours before

Special weather statement, May 25, 9:43 AM CDT, 2 hours 20 minutes before

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Special weather statement, May 25, 9:52 AM CDT, 2 hours 11 minutes before

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Special weather statement, May 25, 10:15 AM CDT, 1 hour 48 minutes before

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Special weather statement, May 25, 10:17 AM CDT, 1 hour 46 minutes before

Special Weather Statement
National Weather Service New Orleans LA
1017 AM CDT Wed May 25 2022

LAZ056>059-065-084>086-251645-
Upper Terrebonne LA-Southern Livingston LA-Western Ascension LA-
Assumption LA-St. John The Baptist LA-St. James LA-
Upper Lafourche LA-Eastern Ascension LA-
1017 AM CDT Wed May 25 2022

...Strong thunderstorms will impact portions of St. John The Baptist,
Ascension, St. James, north central Terrebonne, southeastern
Livingston, northwestern Lafourche and Assumption Parishes through
1145 AM CDT...

At 1016 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Port Vincent to near Bayou Geneve. Movement was
east at 30 mph.

HAZARD...Winds in excess of 40 mph and torrential rainfall.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Thibodaux, Gonzales, Donaldsonville, Napoleonville, Reserve, Laplace,
Gramercy, Lutcher, Sorrento, French Settlement, Schriever, Garyville,
Supreme, Chackbay, Whitehall, Gray, Edgard, South Vacherie,
Paincourtville and Convent.

This includes Interstate 10 in Louisiana between mile markers 174 and
205.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is occurring with these storms and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

If on or near lakes and waterweays, get out of the water and move
indoors or inside a vehicle. Remember, lightning can strike out to
10 miles from the parent thunderstorm. If you can hear thunder, you
are close enough to be struck by lightning. Move to safe shelter
now! Do not be caught on the water in a thunderstorm.

Persons in campgrounds should consider seeking sturdy shelter until
these storms pass.

A Severe Thunderstorm Watch remains in effect until 500 PM CDT for
southeastern Louisiana.

&&

LAT...LON 3029 9097 3031 9053 3030 9056 3026 9059
      3022 9057 3019 9060 3017 9057 3017 9048
      2966 9070 2967 9110 2981 9110 2984 9113
      2984 9116
TIME...MOT...LOC 1516Z 252DEG 28KT 3032 9085 2975 9104

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

KLG

Special weather statement, May 25, 11:29 AM CDT, 34 minutes before

Special Weather Statement
National Weather Service New Orleans LA
1129 AM CDT Wed May 25 2022

LAZ058-071-076-079>082-MSZ077-080-251730-
Southeast St. Tammany LA-Central Tangipahoa LA-Lower Tangipahoa LA-
Northern St. Tammany LA-Northern Tangipahoa LA-
Southwestern St. Tammany LA-St. John The Baptist LA-Hancock MS-
Pearl River MS-
1129 AM CDT Wed May 25 2022

...Strong thunderstorms will impact portions of northeastern St. John
The Baptist, St. Tammany and southeastern Tangipahoa Parishes,
southwestern Hancock and southwestern Pearl River Counties through
1230 PM CDT...

At 1128 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles northwest of Folsom to 7 miles west of
Madisonville to 6 miles north of Arabi. Movement was northeast at 30
mph.

HAZARD...Winds in excess of 40 mph and torrential rainfall.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Slidell, Hammond, Covington, Pearl River, Abita Springs,
Madisonville, Folsom, Sun, Pearlington, Lacombe, Robert, Bush and
Slidell Airport.

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 261 and 273.
 Interstate 10 in Mississippi between mile markers 1 and 4.
 Interstate 12 between mile markers 43 and 84.
 Interstate 55 in Louisiana between mile markers 9 and 21.
 Interstate 59 in Louisiana between mile markers 1 and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is occurring with these storms and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

If on or near area lakes or waterways, get out of the water and move
indoors or inside a vehicle. Remember, lightning can strike out to
10 miles from the parent thunderstorm. If you can hear thunder, you
are close enough to be struck by lightning. Move to safe shelter
now! Do not be caught on the water in a thunderstorm.

A Severe Thunderstorm Watch remains in effect until 500 PM CDT for
southeastern Louisiana...and southern Mississippi.

&&

LAT...LON 3071 9024 3066 8999 3067 8987 3028 8954
      3018 8967 3019 8976 3036 9007 3039 9018
      3038 9023 3024 9035 3019 9042 3022 9044
      3028 9040 3033 9043 3072 9039
TIME...MOT...LOC 1628Z 223DEG 28KT 3068 9029 3036 9029 3004 9003

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

KLG

Local storm report, May 25, 11:38 AM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1138 AM CDT WED MAY 25 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1120 AM     MARINE TSTM WIND 6 WSW EAST NEW ORLEANS  30.04N 90.03W
05/25/2022  M46 MPH          ORLEANS            LA   ASOS

            ASOS STATION KNEW NEW ORLEANS LAKEFRONT
            AIRPORT.

&&

LNN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 7:05 PM CDT	Special Weather Statement	LIX	Pointe Coupee, West Feliciana	40 min
May 24, 7:56 PM CDT	Special Weather Statement	LIX	East Baton Rouge, East Feliciana	49 min
May 24, 10:03 PM CDT	Special Weather Statement	LIX	West Feliciana	42 min
May 24, 10:44 PM CDT	Special Marine Warning	LIX		31 min
May 24, 11:51 PM CDT	Special Marine Warning	LIX		39 min
May 24, 11:52 PM CDT	Special Marine Warning	LIX		38 min
May 25, 12:44 AM CDT	Special Marine Warning	LIX		91 min
May 25, 12:58 AM CDT	Special Marine Warning	LIX		92 min
May 25, 3:13 AM CDT	Special Marine Warning	LIX		62 min
May 25, 3:16 AM CDT	Special Marine Warning	LIX		89 min
May 25, 3:20 AM CDT	Flood Watch	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 13 more	31 hr
May 25, 3:29 AM CDT	Special Marine Warning	LIX		61 min
May 25, 8:18 AM CDT	Special Weather Statement	LIX	Assumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge and 1 more	87 min
May 25, 9:09 AM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, Pointe Coupee, West Feliciana	40 min
May 25, 9:43 AM CDT	Special Weather Statement	LIX	East Baton Rouge, East Feliciana, Livingston, Saint Helena	32 min
May 25, 9:52 AM CDT	Special Weather Statement	LIX	Ascension, Assumption, Saint James	23 min
May 25, 10:15 AM CDT	Special Weather Statement	LIX	Livingston, Saint Helena, Tangipahoa	90 min
May 25, 10:17 AM CDT	Special Weather Statement	LIX	Ascension, Assumption, Saint James	88 min
May 25, 10:25 AM CDT	Special Marine Warning	LIX		65 min
May 25, 10:55 AM CDT	Special Marine Warning	LIX		2 hr
May 25, 11:29 AM CDT	Special Weather Statement	LIX	Saint Tammany	61 min
May 25, 11:39 AM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard	111 min
May 25, 11:41 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	25 min
May 25, 12:12 PM CDT	Special Marine Warning	LIX		63 min
May 25, 12:20 PM CDT	Special Weather Statement	LIX	Washington	70 min
May 25, 12:41 PM CDT	Areal Flood Advisory	LIX	Saint Tammany, Tangipahoa	2 hr
May 25, 12:54 PM CDT	Special Marine Warning	LIX		66 min
May 25, 1:34 PM CDT	Flash Flood Warning	LIX	Saint Tammany	3 hr
May 25, 1:35 PM CDT	Special Weather Statement	LIX	Orleans	55 min
May 25, 1:38 PM CDT	Flash Flood Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	3 hr
May 25, 1:41 PM CDT	Special Weather Statement	LIX	Jefferson	49 min
May 25, 1:55 PM CDT	Special Marine Warning	LIX		107 min
May 25, 1:58 PM CDT	Special Marine Warning	LIX		2 hr
May 25, 2:41 PM CDT	Special Marine Warning	LIX		94 min
May 25, 3:56 PM CDT	Areal Flood Advisory	LIX	Saint Tammany	109 min
May 25, 4:31 PM CDT	Special Marine Warning	LIX		89 min
May 25, 4:58 PM CDT	Special Marine Warning	LIX		92 min
May 25, 5:20 PM CDT	Special Marine Warning	LIX		55 min
May 25, 5:41 PM CDT	Special Weather Statement	LIX	Jefferson	49 min
May 25, 5:43 PM CDT	Special Marine Warning	LIX		68 min
May 25, 5:48 PM CDT	Special Marine Warning	LIX		27 min
May 25, 6:15 PM CDT	Special Marine Warning	LIX		90 min
May 25, 6:21 PM CDT	Special Weather Statement	LIX	Jefferson, Plaquemines	54 min
May 25, 6:51 PM CDT	Special Marine Warning	LIX		24 min
May 24, 10:45 PM CDT	Special Weather Statement	LIX	Jackson	45 min
May 24, 11:19 PM CDT	Areal Flood Advisory	LIX	Jackson	30 min
May 24, 11:49 PM CDT	Flash Flood Warning	LIX	Jackson	86 min
May 25, 12:15 AM CDT	Special Weather Statement	LIX	Jackson	45 min
May 25, 2:35 AM CDT	Special Weather Statement	LIX	Jackson	40 min
May 25, 2:44 AM CDT	Special Weather Statement	LIX	Pike	16 min
May 25, 3:34 AM CDT	Special Weather Statement	LIX	Jackson	86 min
May 25, 3:37 AM CDT	Special Weather Statement	LIX	Pike	68 min
May 25, 8:50 AM CDT	Special Weather Statement	LIX	Wilkinson	55 min
May 25, 8:51 AM CDT	River Flood Warning	LIX	Pearl River	56 hr
May 25, 8:51 AM CDT	River Flood Warning	LIX	Pearl River	46 hr
May 25, 8:57 AM CDT	River Flood Warning	LIX	Harrison	3 days
May 25, 8:57 AM CDT	River Flood Warning	LIX	Harrison	4 days
May 25, 2:09 PM CDT	Areal Flood Advisory	LIX	Jackson	3 hr
May 25, 2:34 PM CDT	Special Weather Statement	LIX	Hancock, Pearl River	26 min
May 25, 2:43 PM CDT	Tornado Warning	LIX	Hancock, Harrison	34 min
May 25, 3:04 PM CDT	Special Weather Statement	LIX	Hancock, Harrison, Pearl River	56 min
May 25, 4:08 PM CDT	Special Weather Statement	LIX	Jackson	82 min

Nearby

Flash Flood Warnings in Louisiana, 2022 Every flash flood warning in 2022

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.