Alert archive / Louisiana / Flash Flood Warnings in 2002

Flash Flood Warning 9, NWS Lake Charles, LA

October 9, 2002St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at Oct 9, 2002, 8:47 AM CDT for St. Mary 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: Oct 9, 2002, 8:47 AM CDT (13:47 UTC)
Expired: Oct 9, 2002, 1:45 PM CDT
In force: 5 hr
Issued by: NWS Lake Charles, LA
Area: Counties, with a storm outline in the text

County St. Mary Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.8 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: 458 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 647 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KLCH 091347
FFWLCH
LAC101-091645-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
844 AM CDT WED OCT 9 2002

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ST. MARY PARISH IN SOUTH CENTRAL LOUISIANA

* UNTIL 145 PM CDT

* AT 842 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED
  THAT 4 TO 5 INCHES OF RAIN HAS FALLEN ACROSS CENTRAL SAINT MARY 
  PARISH NEAR AND SOUTH OF FRANKLIN DURING THE PAST THREE HOURS. 
  TWO INCHES OF ADDITIONAL RAINFALL IS EXPECTED IN THE WARNED AREA 
  THROUGH 11.

HEAVY RAINS FLOOD ROADS AND LOW LYING AREAS RAPIDLY...SO DO NOT DRIVE
YOUR VEHICLE WHERE WATERS OF AN UNKNOWN DEPTH COVERS THE ROAD.

RESIDENTS LIVING ALONG STREAMS...CREEKS AND DRAINAGE DITCHES SHOULD
BE READY TO TAKE IMMEDIATE ACTION IF FLOODING IS OBSERVED.

CALL 337-477-5285 TO REPORT FLOODING TO THE WEATHER SERVICE.

LAT...LON 2984 9145 2962 9129 2956 9169 2987 9162

$$

20

1 follow-up statement

000 
WGUS74 KLCH 091640
FFSLCH
LAC101-091800-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1140 AM CDT WED OCT 9 2002

...THE FLASH FLOOD WARNING PREVIOUSLY ISSUED FOR SAINT MARY
PARISH WILL EXPIRE AT 1145 AM...

RADAR INDICATES THAT THE HEAVY RAINS HAVE MOVED NORTHEAST OUT OF
CENTRAL SAINT MARY PARISH. HOWEVER RAIN AND SHOWERS WILL LIKELY
CONTINUE IN THE AREA INTO LATE AFTERNOON. A FEW THUNDERSTORMS COULD
DEVELOP. ADDITIONAL RAINS OF 1 TO 2 INCHES WILL BE POSSIBLE...MAINLY
OVER THE EASTERN PARTS OF THE PARISH...DURING THE NEXT FEW HOURS.

DO NOT DRIVE YOUR VEHICLE WHERE WATER OF AN UNKNOWN DEPTH COVERS
THE ROAD.

$$

20

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 9, 12:38 AM CDT	Special Marine Warning	LCH		52 min
Oct 9, 12:38 AM CDT	Special Marine Warning	LCH		52 min
Oct 9, 1:30 AM CDT	Special Marine Warning	LCH		60 min
Oct 9, 3:15 AM CDT	Severe Thunderstorm Warning	LCH	Vermilion	60 min
Oct 9, 3:07 PM CDT	Flash Flood Warning	LCH	St. Mary	4 hr

Nearby

Flash Flood Warnings in Louisiana, 2002 Every flash flood warning in 2002

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.