Alert archive / Louisiana / Flash Flood Warnings in 2017

Flash Flood Warning 4, NWS Lake Charles, LA

March 30, 2017Saint Landry Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Mar 30, 2017, 1:42 AM CDT for Saint Landry Parish, Louisiana. It was in force for 5 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: Mar 30, 2017, 1:42 AM CDT (06:42 UTC)
Expired: Mar 30, 2017, 6:45 AM CDT
In force: 5 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

County Saint Landry Parish, LA

The radar

The Ft Polk radar (KPOE), 122 km from the middle of the area, began a volume at 06:42 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.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 6.7 hours before the alert went out and 134 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: 1539 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 662 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

As transmitted.

748 
WGUS54 KLCH 300642
FFWLCH
LAC097-301145-
/O.NEW.KLCH.FF.W.0004.170330T0642Z-170330T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
142 AM CDT THU MAR 30 2017

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  St. Landry Parish in central Louisiana...

* Until 645 AM CDT

* At 141 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 2 to 5 inches of rain have 
  fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Opelousas, Krotz Springs, Leonville, Arnaudville, Melville,
  Palmetto, Bayou Current, Sunset, Port Barre, Washington, Grand
  Coteau, Cankton, Big Cane and Lebeau.

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.

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

&&

LAT...LON 3051 9175 3045 9173 3040 9194 3041 9198
      3037 9199 3036 9203 3038 9205 3036 9208
      3033 9209 3032 9213 3081 9213 3085 9202
      3085 9181 3084 9180 3082 9181 3078 9177
      3074 9176 3071 9173 3056 9176 3051 9173

$$

Tingler

1 follow-up statement

510 
WGUS74 KLCH 300933
FFSLCH

Flash Flood Statement
National Weather Service Lake Charles LA
433 AM CDT THU MAR 30 2017

LAC097-300942-
/O.CAN.KLCH.FF.W.0004.000000T0000Z-170330T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
St. Landry LA-
433 AM CDT THU MAR 30 2017

...THE FLASH FLOOD WARNING FOR ST. LANDRY PARISH IS CANCELLED...

The heavy rain has ended. Flash flooding is no longer expected to 
pose a threat, however flooding of roadways is likely still 
occurring. Please continue to heed any remaining road closures.

LAT...LON 3051 9175 3045 9173 3040 9194 3041 9198
      3037 9199 3036 9203 3038 9205 3036 9208
      3033 9209 3032 9213 3081 9213 3085 9202
      3085 9181 3084 9180 3082 9181 3078 9177
      3074 9176 3071 9173 3056 9176 3051 9173

$$

Tingler

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 29, 7:00 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Calcasieu, Cameron, Jefferson Davis	45 min
Mar 29, 7:03 PM CDT	Special Weather Statement	LCH	Allen, Jefferson Davis	57 min
Mar 29, 7:42 PM CDT	Special Weather Statement	LCH	Acadia	48 min
Mar 29, 7:53 PM CDT	Flash Flood Warning	LCH	Calcasieu, Cameron, Jefferson Davis	6 hr
Mar 29, 8:00 PM CDT	Tornado Warning	LCH	Acadia, Jefferson Davis	30 min
Mar 29, 8:20 PM CDT	Special Weather Statement	LCH	Acadia, Lafayette, Saint Landry	40 min
Mar 29, 8:27 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Evangeline, Lafayette, Saint Landry	48 min
Mar 29, 8:27 PM CDT	Tornado Warning	LCH	Allen, Evangeline, Rapides	12 min
Mar 29, 8:50 PM CDT	Severe Thunderstorm Warning	LCH	Iberia, Lafayette, Saint Landry, Saint Martin, St. Mary, Vermilion	40 min
Mar 29, 9:23 PM CDT	Special Weather Statement	LCH	Calcasieu	52 min
Mar 29, 9:25 PM CDT	Special Weather Statement	LCH	Acadia	35 min
Mar 29, 9:28 PM CDT	Special Weather Statement	LCH	Vermilion	32 min
Mar 29, 9:30 PM CDT	Special Weather Statement	LCH	Saint Martin	30 min
Mar 29, 9:44 PM CDT	Areal Flood Advisory	LCH	Acadia, Evangeline, Jefferson Davis, Saint Landry	3 hr
Mar 29, 9:56 PM CDT	Special Weather Statement	LCH	Saint Martin	49 min
Mar 29, 10:30 PM CDT	Flash Flood Warning	LCH	Acadia, Allen, Evangeline, Jefferson Davis, Saint Landry	6 hr
Mar 29, 10:43 PM CDT	Special Weather Statement	LCH	Saint Martin	47 min
Mar 29, 11:25 PM CDT	Special Weather Statement	LCH	Saint Martin	65 min
Mar 30, 12:19 AM CDT	Special Weather Statement	LCH	Vermilion	56 min
Mar 30, 12:26 AM CDT	Special Marine Warning	LCH		49 min
Mar 30, 12:31 AM CDT	Severe Thunderstorm Warning	LCH	Cameron, Vermilion	44 min
Mar 30, 12:32 AM CDT	Special Weather Statement	LCH	Saint Martin	43 min
Mar 30, 1:14 AM CDT	Special Marine Warning	LCH		61 min
Mar 30, 1:17 AM CDT	Special Weather Statement	LCH	Vermilion	43 min
Mar 30, 1:45 AM CDT	Areal Flood Advisory	LCH	Lafayette, Saint Martin	4 hr
Mar 30, 1:55 AM CDT	Areal Flood Warning	LCH	Calcasieu, Jefferson Davis	6 hr
Mar 30, 2:05 AM CDT	Special Weather Statement	LCH	Vermilion	40 min
Mar 30, 2:10 AM CDT	Special Marine Warning	LCH		65 min
Mar 30, 2:20 AM CDT	River Flood Warning	LCH	Calcasieu	16 days
Mar 30, 2:40 AM CDT	Special Weather Statement	LCH	Iberia, Saint Martin, St. Mary	50 min
Mar 30, 3:10 AM CDT	Special Marine Warning	LCH		95 min
Mar 30, 3:20 AM CDT	Areal Flood Advisory	LCH	Iberia, Saint Martin, St. Mary	3 hr
Mar 30, 4:31 AM CDT	Areal Flood Warning	LCH	Acadia, Allen, Evangeline, Jefferson Davis, Saint Landry	6 hr
Mar 30, 4:45 AM CDT	Special Weather Statement	LCH	Assumption	45 min
Mar 30, 4:55 AM CDT	River Flood Warning	LCH	Acadia, Evangeline, Saint Landry	7 days
Mar 30, 5:16 AM CDT	River Flood Warning	LCH	Calcasieu	29 hr
Mar 30, 6:06 AM CDT	Special Marine Warning	LCH		84 min
Mar 30, 6:18 AM CDT	Special Weather Statement	LCH	St. Mary	42 min
Mar 30, 6:21 AM CDT	Areal Flood Advisory	LCH	Iberia, Saint Martin, St. Mary	114 min
Mar 30, 6:29 AM CDT	Severe Thunderstorm Warning	LCH	St. Mary	27 min
Mar 30, 9:12 AM CDT	Areal Flood Advisory	LCH	Iberia, Saint Martin, St. Mary, Vermilion	3 hr
Mar 30, 10:06 AM CDT	River Flood Warning	LCH	Calcasieu	34 hr

Nearby

Flash Flood Warnings in Louisiana, 2017 Every flash flood warning in 2017

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; radar from the NEXRAD Level II archive.