Alert archive / Louisiana / Flash Flood Warnings in 2018

Flash Flood Warning 21, NWS Lake Charles, LA

March 29, 20187 parishes in Louisiana; Newton County, Texas

NWS Lake Charles, LA issued this flash flood warning at Mar 29, 2018, 4:55 AM CDT for 7 parishes in Louisiana; Newton County, Texas. It was in force for 3 hr. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 29, 2018, 4:55 AM CDT (09:55 UTC)
Expired: Mar 29, 2018, 8:00 AM CDT
In force: 3 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Evangeline Parish, LA, Rapides Parish, LA, Vernon Parish, LA, Newton County, TX

The radar

The Ft Polk radar (KPOE), 36 km from the middle of the area, began a volume at 09:56 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.

What was reported inside it

Time	Report	Where	Remark
Mar 29, 5:20 AM CDT	FLASH FLOOD	3 Ne Alexandria, LA	MPING REPORT OF STREET FLOODING.
Mar 29, 5:42 AM CDT	FLASH FLOOD	4 Nw Pineville, LA	PUBLIC POSTED PHOTO TO SOCIAL MEDIA OF FLOODING ON RIGOLETTE ROAD. THEY REPORT THE WATER IS AT LEAST 12 INCHES DEEP.
Mar 29, 5:58 AM CDT	FLASH FLOOD	3 Sse Tulla, LA	BROADCAST MEDIA REPORTS FLOODING WITH WATER ENTERING HOMES ON HAUSER ROAD.
Mar 29, 6:25 AM CDT	FLASH FLOOD	2 Nnw De Quincy, LA	BROADCAST MEDIA REPORTS HIGHWAY 389 NEAR HARGROVE PENTECOSTAL CHURCH.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 9.9 hours before the alert went out and 133 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: 1263 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 9.7

Open this sounding in Storm Lab

The text

As transmitted.

012 
WGUS54 KLCH 290955
FFWLCH
LAC003-009-011-019-039-079-115-TXC351-291300-
/O.NEW.KLCH.FF.W.0021.180329T0955Z-180329T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
455 AM CDT THU MAR 29 2018

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  Rapides Parish in central Louisiana...
  Beauregard Parish in southwestern Louisiana...
  Northern Evangeline Parish in central Louisiana...
  Northwestern Calcasieu Parish in southwestern Louisiana...
  Avoyelles Parish in central Louisiana...
  Vernon Parish in west central Louisiana...
  Allen Parish in southwestern Louisiana...
  Eastern Newton County in southeastern Texas...

* Until 800 AM CDT

* At 455 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 4 to 8 inches of rain have 
  fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Alexandria, Pineville, Oakdale, Leesville, Marksville, Bunkie,
  Simmesport, Oberlin, Rosepine, Glenmora, Merryville, Boyce,
  Moreauville, Anacoco, Cheneyville, Elizabeth, Turkey Creek, Reeves,
  Singer and Sugartown.

Additional rainfall amounts of 1 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3139 9266 3148 9220 3133 9208 3132 9200
      3122 9199 3123 9192 3127 9195 3130 9191
      3122 9175 3110 9170 3100 9177 3046 9316
      3037 9376 3117 9360 3117 9359 3128 9353
      3128 9344 3136 9339 3135 9295 3152 9272

$$

Rua

The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 28, 7:01 PM CDT	Areal Flood Advisory	LCH	Beauregard, Vernon	3 hr
Mar 28, 7:53 PM CDT	Special Weather Statement	LCH	Beauregard	37 min
Mar 28, 8:23 PM CDT	Areal Flood Advisory	LCH	Beauregard, Calcasieu	3 hr
Mar 28, 10:03 PM CDT	Areal Flood Advisory	LCH	Beauregard, Vernon	3 hr
Mar 28, 10:35 PM CDT	Flash Flood Warning	LCH	Beauregard, Calcasieu	3 hr
Mar 29, 1:02 AM CDT	Flash Flood Warning	LCH	Allen, Avoyelles, Beauregard, Rapides, Vernon	4 hr
Mar 29, 3:46 AM CDT	Special Marine Warning	LCH		59 min
Mar 29, 4:06 AM CDT	Special Weather Statement	LCH	Rapides	54 min
Mar 29, 4:20 AM CDT	Areal Flood Advisory	LCH	Beauregard, Calcasieu	115 min
Mar 29, 5:02 AM CDT	Special Marine Warning	LCH		58 min
Mar 29, 5:55 AM CDT	Special Marine Warning	LCH		65 min
Mar 29, 6:11 AM CDT	River Flood Warning	LCH	Beauregard	4 days
Mar 29, 6:35 AM CDT	Special Weather Statement	LCH	Lafayette, Saint Landry	25 min
Mar 29, 6:59 AM CDT	Special Weather Statement	LCH	Iberia	61 min
Mar 29, 7:01 AM CDT	Special Marine Warning	LCH		59 min
Mar 29, 7:56 AM CDT	Special Weather Statement	LCH	Saint Martin, St. Mary	64 min
Mar 29, 7:59 AM CDT	Special Marine Warning	LCH		61 min
Mar 29, 8:18 AM CDT	Areal Flood Warning	LCH	Allen, Beauregard, Calcasieu, Rapides, Vernon	6 hr
Mar 29, 9:06 AM CDT	Special Weather Statement	LCH	Assumption	24 min
Mar 29, 10:52 AM CDT	River Flood Warning	LCH	Allen, Jefferson Davis	7 days
Mar 29, 10:52 AM CDT	River Flood Warning	LCH	Calcasieu	5 days
Mar 29, 10:52 AM CDT	River Flood Warning	LCH	Allen	4 days
Mar 28, 9:19 PM CDT	River Flood Warning	LCH	Jasper, Tyler	5 days
Mar 28, 9:19 PM CDT	River Flood Warning	LCH	Hardin, Jasper	9 days
Mar 28, 9:19 PM CDT	River Flood Warning	LCH	Hardin, Jasper, Jefferson, Orange	13 days
Mar 28, 9:19 PM CDT	River Flood Warning	LCH	Jefferson, Orange	11 days
Mar 28, 9:19 PM CDT	River Flood Warning	LCH	Hardin	5 days
Mar 28, 9:19 PM CDT	River Flood Warning	LCH	Hardin, Jefferson	24 hr
Mar 28, 9:45 PM CDT	Special Weather Statement	LCH	Orange	30 min
Mar 28, 9:58 PM CDT	Flash Flood Warning	LCH	Hardin, Jasper, Jefferson, Newton, Orange	3 hr
Mar 29, 1:41 AM CDT	Flash Flood Warning	LCH	Jasper, Newton, Tyler	4 hr
Mar 29, 2:52 AM CDT	Special Weather Statement	LCH	Hardin, Jefferson, Orange	53 min
Mar 29, 3:01 AM CDT	Flash Flood Warning	LCH	Hardin, Jasper, Jefferson, Newton, Orange	119 min
Mar 29, 5:21 AM CDT	Areal Flood Warning	LCH	Hardin, Jasper, Jefferson, Newton, Orange, Tyler	3 hr

Nearby

Flash Flood Warnings in Louisiana, 2018 Flash Flood Warnings in Texas, 2018 Every flash flood warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.