Alert archive / Louisiana / Flash Flood Warnings in 2019

Flash Flood Warning 31, NWS New Orleans, LA

July 14, 20197 parishes in Louisiana

NWS New Orleans, LA issued this flash flood warning at Jul 14, 2019, 10:10 PM CDT for 7 parishes in 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 counties it named.

The facts

Issued: Jul 14, 2019, 10:10 PM CDT (03:10 UTC)
Expired: Jul 15, 2019, 1:15 AM CDT
In force: 3 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Pointe Coupee Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.2 hours before the alert went out and 153 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: 1805 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 559 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 14, 7:59 PM CDT, 2 hours 11 minutes earlier.

Area forecast discussion, Jul 14, 7:59 PM CDT, 2 hours 11 minutes before

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Hazardous weather outlook, Jul 14, 2:59 AM CDT, 19 hours 11 minutes before

Hazardous Weather Outlook
National Weather Service New Orleans LA
259 AM CDT Sun Jul 14 2019

GMZ530-532-534-536-538-550-552-555-557-570-572-575-577-LAZ034>037-
039-040-046>050-056>072-MSZ068>071-077-080>082-142000-
Lake Pontchartrain and Lake Maurepas-Mississippi Sound-
Lake Borgne-Chandeleur Sound-Breton Sound-
Coastal Waters from Port Fourchon LA to Lower Atchafalaya River
LA out 20 nm-
Coastal waters from the Southwest Pass of the Mississippi River
to Port Fourchon Louisiana out 20 NM-
Coastal Waters from Boothville LA to Southwest Pass of the
Mississippi River out 20 nm-
Coastal waters from Pascagoula Mississippi to Stake Island out
20 NM-
Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya
River LA from 20 to 60 NM-
Coastal waters from Southwest Pass of the Mississippi River to
Port Fourchon Louisiana from 20 to 60 NM-
Coastal Waters from Stake Island LA to Southwest Pass of the
Mississippi River from 20 to 60 nm-
Coastal waters from Pascagoula Mississippi to Stake Island
Louisiana out 20 to 60 NM-Pointe Coupee-West Feliciana-
East Feliciana-St. Helena-Washington-St. Tammany-Iberville-
West Baton Rouge-East Baton Rouge-Ascension-Livingston-Assumption-
St. James-St. John The Baptist-Upper Lafourche-St. Charles-
Upper Jefferson-Orleans-Upper Plaquemines-Upper St. Bernard-
Upper Terrebonne-Lower Terrebonne-Lower Lafourche-Lower Jefferson-
Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa-
Southern Tangipahoa-Wilkinson-Amite-Pike-Walthall-Pearl River-
Hancock-Harrison-Jackson-
259 AM CDT Sun Jul 14 2019

This Hazardous Weather Outlook is for portions of Southeast
Louisiana...South Mississippi and the adjacent coastal waters.

.DAY ONE...Tonight

A Flash Flood Watch remains in effect for the entire outlook area
through this evening, and may be extended in time for portions of
the area into tonight. Bands of tropical showers and storms
at times will be capable of producing torrential rainfall, gusty
winds 35 to 50 mph and occasional lightning. Flash flooding may
result under these bands.

There is a marginal risk of severe thunderstorms today and
tonight. The primary concern will be brief, weak tornadoes within
the bands of rain. Waterspouts in the near shore waters may move
ashore in the coastal areas before dissipating.

A Coastal Flood Advisory is in effect for minor and slowly
improving coastal flooding along the Louisiana coast and tidal
lakes today. Abnormally high tides 1 to less than 3 feet above
normal will be common this morning, but improving after high tide
this afternoon.

A Small Craft Advisory is in effect for the coastal waters and
tidal lakes through 7 am CDT this morning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

There will still be a threat of heavy rainfall from lingering
rain bands Monday. The outlook area should transition to a more
typical summer pattern of daily scattered afternoon thunderstorms
Tuesday through Saturday.

Depending on short-term rainfall trends, several area rivers and
streams may be in flood. Refer to the latest river flood
statements for more details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is still requested for flash flood monitoring
today.

24/RR

In the hours before

Special weather statement, Jul 14, 5:16 PM CDT, 4 hours 54 minutes before

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Special weather statement, Jul 14, 5:57 PM CDT, 4 hours 13 minutes before

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Special weather statement, Jul 14, 6:22 PM CDT, 3 hours 48 minutes before

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Special weather statement, Jul 14, 7:35 PM CDT, 2 hours 35 minutes before

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Special weather statement, Jul 14, 7:40 PM CDT, 2 hours 30 minutes before

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Special weather statement, Jul 14, 8:07 PM CDT, 2 hours 3 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 7:03 PM CDT	Areal Flood Advisory	LIX	Livingston, Saint John the Baptist, Saint Tammany, Tangipahoa	3 hr
Jul 14, 7:35 PM CDT	Special Weather Statement	LIX	Saint Tammany	25 min
Jul 14, 7:40 PM CDT	Special Weather Statement	LIX	Washington	65 min
Jul 14, 8:07 PM CDT	Special Weather Statement	LIX	Saint Tammany	23 min
Jul 14, 11:22 PM CDT	Areal Flood Advisory	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 2 more	3 hr
Jul 15, 5:28 AM CDT	Areal Flood Advisory	LIX	Pointe Coupee, West Feliciana	3 hr
Jul 15, 9:58 AM CDT	Flash Flood Warning	LIX	Pointe Coupee, West Feliciana	3 hr
Jul 14, 8:07 PM CDT	River Flood Warning	LIX	Pearl River	29 hr
Jul 15, 6:38 AM CDT	Special Weather Statement	LIX	Wilkinson	37 min
Jul 15, 6:44 AM CDT	Severe Thunderstorm Warning	LIX	Wilkinson	31 min
Jul 15, 5:26 PM CDT	Special Weather Statement	LIX	Pike	34 min
Jul 15, 6:01 PM CDT	Special Weather Statement	LIX	Pike	29 min

Nearby

Flash Flood Warnings in Louisiana, 2019 Every flash flood warning in 2019

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.