Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 8, NWS Lake Charles, LA

February 18, 2012Jefferson County, Texas

NWS Lake Charles, LA issued this flash flood warning at Feb 18, 2012, 7:37 AM CST for Jefferson County, Texas. It was in force for 6 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: Feb 18, 2012, 7:37 AM CST (13:37 UTC)
Expired: Feb 18, 2012, 1:30 PM CST
In force: 6 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), 76 km from the middle of the area, began a volume at 13:40 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 12:00Z, 1.6 hours before the alert went out and 77 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 564 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 359 m²/s²
0-3 km storm-relative helicity: 635 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

210 
WGUS54 KLCH 181337
FFWLCH
TXC245-181630-
/O.NEW.KLCH.FF.W.0008.120218T1337Z-120218T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
737 AM CST SAT FEB 18 2012

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN JEFFERSON COUNTY IN SOUTHEAST TEXAS...

* UNTIL 1030 AM CST

* AT 734 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS SOUTHEAST JEFFERSON  
  COUNTY INCLUDING THE PORT ARTHUR AREA. RAINFALL RATES OF BETWEEN 4 
  AND 5 INCHES PER HOUR HAV BEEN INDICATED BY RADAR AND THIS WILL    
  LIKELY CAUSE FLOODING...ESPECIALLY IN THE URBAN AREAS OF           
  SOUTHEASTERN JEFFERSON COUNTY INCLUDING PORT ARTHUR

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CENTRAL GARDENS...GROVES...NEDERLAND...PORT ARTHUR...PORT NECHES...
  PORT ACRES AND SOUTHEAST TEXAS REGIONAL AIRPORT.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

&&

LAT...LON 3005 9413 2997 9385 2996 9384 2992 9385
      2991 9388 2987 9391 2984 9390 2981 9392
      2978 9392 2977 9390 2970 9391 2969 9417

$$

BRAZZELL

1 follow-up statement

859 
WGUS54 KLCH 181636
FFWLCH
TXC245-181930-
/O.EXT.KLCH.FF.W.0008.000000T0000Z-120218T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1036 AM CST SAT FEB 18 2012

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  EASTERN JEFFERSON COUNTY IN SOUTHEAST TEXAS...

* UNTIL 130 PM CST

* AT 1032 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  THAT TWO TO FOUR INCHES OF RAIN HAS FALLEN THIS MORNING. SOME      
  ADDITIONAL MODERATE TO AT TIMES HEAVY RAINFALL CONTINUES TO BE     
  POSSIBLE THAT COULD PRODUCE FLOODING. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CENTRAL GARDENS...GROVES...NEDERLAND...PORT ARTHUR...PORT NECHES...
  PORT ACRES AND SOUTHEAST TEXAS REGIONAL AIRPORT.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

&&

LAT...LON 3005 9413 2997 9385 2996 9384 2992 9385
      2991 9388 2987 9391 2984 9390 2981 9392
      2978 9392 2977 9390 2970 9391 2969 9417

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 18, 5:52 AM CST	Severe Thunderstorm Warning	LCH	Hardin, Jasper, Jefferson, Tyler	53 min
Feb 18, 6:24 AM CST	Areal Flood Advisory	LCH	Hardin, Tyler	111 min
Feb 18, 6:43 AM CST	Special Weather Statement	LCH	Jefferson, Orange	47 min
Feb 18, 7:14 AM CST	Severe Thunderstorm Warning	LCH	Jefferson, Newton, Orange	61 min
Feb 18, 7:21 AM CST	Areal Flood Advisory	LCH	Jasper, Newton, Tyler	84 min
Feb 18, 7:27 AM CST	Areal Flood Advisory	LCH	Jasper, Jefferson, Newton, Orange	93 min
Feb 18, 9:02 AM CST	River Flood Warning	LCH	Newton, Orange	13 hr
Feb 18, 9:02 AM CST	River Flood Warning	LCH	Hardin, Jefferson	10 days

Nearby

Flash Flood Warnings in Texas, 2012 Every flash flood warning in 2012

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.