Alert archive / Texas / Flash Flood Warnings in 2016

Flash Flood Warning 18, NWS Lake Charles, LA

April 18, 2016Jefferson County, Texas

NWS Lake Charles, LA issued this flash flood warning at Apr 18, 2016, 9:44 AM CDT for Jefferson County, Texas. It was in force for 3 hr. 1 report 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
Apr 18, 2016, 9:44 AM CDT (14:44 UTC)
Expired
Apr 18, 2016, 12:45 PM CDT
In force
3 hr
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Flood severity
None

County Jefferson County, TX

The radar

The Lake Charles radar (KLCH), 74 km from the middle of the area, began a volume at 14:43 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

TimeReportWhereRemark
Apr 18, 11:20 AM CDTFLASH FLOOD1 Ese Central Gardens, TXTXDOT REPORTS FLOODING ON FM 366 AT SH 347

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 12:00Z, 2.7 hours before the alert went out and 76 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 12:00Z on 2016-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 283 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 2016-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 174 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
283 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
517 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
174 m²/s²
0-3 km storm-relative helicity
231 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted.

919 
WGUS54 KLCH 181444
FFWLCH
TXC245-181745-
/O.NEW.KLCH.FF.W.0018.160418T1444Z-160418T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
944 AM CDT MON APR 18 2016

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL JEFFERSON COUNTY IN SOUTHEASTERN TEXAS...

* UNTIL 1245 PM CDT

* AT 942 AM CDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE
  WARNED AREA. UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN.
  SIGNIGICANT URBAN FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  PORT ARTHUR...NEDERLAND...GROVES...PORT NECHES...CENTRAL GARDENS...PORT
  ACRES AND SOUTHEAST TEXAS REGIONAL AIRPORT.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SIGNIFICANT URBAN FLOODING IS EXPECTED TO BEGIN SHORTLY. DELAY
TRAVEL FOR A FEW HOURS IF POSSIBLE. 

&&

LAT...LON 2991 9409 3003 9400 3001 9400 3002 9398
      3001 9398 3001 9396 3000 9396 2999 9394
      3000 9392 2998 9390 2997 9386 2991 9388
      2986 9393 2985 9392 2985 9394 2981 9395

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 18, 6:17 AM CDTSpecial Weather StatementLCHHardin43 min
Apr 18, 6:25 AM CDTFlash Flood WatchLCHHardin, Jasper, Newton, Tyler31 hr
Apr 18, 6:59 AM CDTSpecial Weather StatementLCHHardin46 min
Apr 18, 7:46 AM CDTAreal Flood AdvisoryLCHJefferson3 hr
Apr 18, 9:05 AM CDTAreal Flood AdvisoryLCHJefferson, Orange3 hr
Apr 18, 9:31 AM CDTRiver Flood WarningLCHJefferson, Orange25 days
Apr 18, 10:15 AM CDTFlash Flood WarningLCHOrange3 hr
Apr 18, 10:38 AM CDTRiver Flood WarningLCHNewton, Orange58 days
Apr 18, 10:42 AM CDTSpecial Weather StatementLCHJefferson48 min
Apr 18, 11:26 AM CDTFlash Flood WarningLCHJasper, Newton3 hr
Apr 18, 11:49 AM CDTFlash Flood WarningLCHHardin3 hr
Apr 18, 1:15 PM CDTFlash Flood WarningLCHHardin, Jefferson, Orange3 hr
Apr 18, 2:22 PM CDTFlash Flood WarningLCHJasper, Newton6 hr
Apr 18, 2:32 PM CDTAreal Flood AdvisoryLCHHardin, Jasper, Newton, Tyler3 hr
Apr 18, 2:52 PM CDTAreal Flood WarningLCHHardin30 hr
Apr 18, 3:43 PM CDTRiver Flood WarningLCHHardin, Jasper9 days
Apr 18, 3:43 PM CDTRiver Flood WarningLCHHardin4 days
Apr 18, 3:43 PM CDTRiver Flood WarningLCHHardin, Jefferson11 days
Apr 18, 4:26 PM CDTFlash Flood WarningLCHOrange3 hr

Nearby

Flash Flood Warnings in Texas, 2016Every flash flood warning in 2016

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.