Alert archive / Louisiana / Flash Flood Warnings in 2017

Flash Flood Warning 35, NWS Lake Charles, LA

May 30, 2017Iberia Parish, Saint Martin Parish, St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at May 30, 2017, 1:31 PM CDT for Iberia Parish, Saint Martin Parish, St. Mary Parish, 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 outline as issued.

The facts

Issued: May 30, 2017, 1:31 PM CDT (18:31 UTC)
Expired: May 30, 2017, 4:30 PM CDT
In force: 3 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

Counties Iberia Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 6.5 hours before the alert went out and 169 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: 324 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 887 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

215 
WGUS54 KLCH 301831
FFWLCH
LAC045-099-101-302130-
/O.NEW.KLCH.FF.W.0035.170530T1831Z-170530T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
131 PM CDT TUE MAY 30 2017

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  Northwestern Iberia Parish in south central Louisiana...
  St. Mary Parish in south central Louisiana...
  Southeastern St. Martin Parish in south central Louisiana...

* Until 430 PM CDT

* At 130 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 3 to 6 inches of rain have 
  fallen, and more rain is moving back into the area. Flash flooding 
  is expected to begin shortly.

* Some locations that will experience flooding include...
  Morgan City, Franklin, Patterson, Jeanerette, Berwick, Burns Point,
  Belle River, Bayou Vista, Cypremort Point, Stephensville, Baldwin,
  Loreauville, Ellerslie, Patterson Memorial Airport, Lydia, Sorrel,
  Amelia, Glencoe, Cote Blanche Island and Lake Fausse Pointe.

LAT...LON 2939 9148 2955 9141 2953 9152 2941 9149
      2964 9156 2958 9176 2965 9163 2975 9160
      2970 9186 2957 9177 2957 9171 2956 9171
      2954 9173 2964 9191 3010 9175 2998 9126
      2980 9109 2962 9111 2955 9128 2933 9135

$$

Tingler

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 7:42 AM CDT	Special Marine Warning	LCH		93 min
May 30, 8:02 AM CDT	Special Weather Statement	LCH	Vermilion	43 min
May 30, 8:27 AM CDT	Tornado Warning	LCH	Vermilion	18 min
May 30, 8:38 AM CDT	Flash Flood Warning	LCH	Iberia, St. Mary	2 hr
May 30, 9:02 AM CDT	Special Marine Warning	LCH		88 min
May 30, 9:11 AM CDT	Special Marine Warning	LCH		2 hr
May 30, 9:45 AM CDT	Areal Flood Advisory	LCH	Iberia, St. Mary, Vermilion	2 hr
May 30, 10:37 AM CDT	Flash Flood Warning	LCH	Iberia, St. Mary	3 hr
May 30, 10:40 AM CDT	Areal Flood Advisory	LCH	Iberia, Lafayette, Saint Martin	2 hr
May 30, 10:44 AM CDT	Areal Flood Advisory	LCH	Iberia, Saint Martin, St. Mary	2 hr
May 30, 11:05 AM CDT	Special Marine Warning	LCH		115 min
May 30, 1:15 PM CDT	Special Marine Warning	LCH		2 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.