Alert archive / Arkansas / Flash Flood Warnings in 2002

Flash Flood Warning 13, NWS Shreveport, LA

December 18, 2002Columbia County, Lafayette County, Arkansas; Webster Parish, Louisiana

NWS Shreveport, LA issued this flash flood warning at Dec 18, 2002, 9:21 PM CST for Columbia County, Lafayette County, Arkansas; Webster Parish, Louisiana. It was in force for 4 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: Dec 18, 2002, 9:21 PM CST (03:21 UTC)
Expired: Dec 19, 2002, 1:15 AM CST
In force: 4 hr
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

Counties Columbia County, AR, Lafayette County, AR, Webster Parish, LA

The radar

The Shreveport radar (KSHV), 88 km from the middle of the area, began a volume at 03:23 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

Shreveport, LA (KSHV), launched 00:00Z, 3.4 hours before the alert went out and 81 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: 1623 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 618 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 291 m²/s²
0-3 km storm-relative helicity: 354 m²/s²
Significant tornado parameter: 3.8
Supercell composite: 12.0

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KSHV 190321
FFWSHV
ARC027-073-LAC119-190715-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
918 PM CST WED DEC 18 2002

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN WEBSTER PARISH IN NORTHWEST LOUISIANA
  COLUMBIA COUNTY IN SOUTHWEST ARKANSAS
  LAFAYETTE COUNTY IN SOUTHWEST ARKANSAS

* UNTIL 115 AM CST

* AT 915 PM...SPOTTERS REPORTED CARS STRANDED IN THE ROADWAYS ACROSS
  SPRINGHILL IN NORTHERN WEBSTER PARISH. OVER AN INCH AND A HALF OF 
  RAIN HAS FALLEN OVER SPRINGHILL IN A SHORT DURATION THUNDERSTORM.
  ELSEWHERE ACROSS THE SAME AREA...ESPECIALLY JUST NORTH OF THE 
  ARKANSAS BORDER...3 TO 5 INCHES OF RAINFALL HAS OCCCURRED THIS 
  EVENING. ADDITIONAL THUNDERSTORM ACTIVITY WILL CONTINUE MOVING
  ACROSS THE SAME REGION. 

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD
WARNING FOR...
  WEBSTER PARISH IN NORTHWEST LOUISIANA
  COLUMBIA COUNTY IN SOUTHWEST ARKANSAS
  LAFAYETTE COUNTY IN SOUTHWEST ARKANSAS
UNTIL 115 AM CST.

LAT...LON 3289 9341 3318 9306 3342 9320 3324 9366

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 18, 8:14 PM CST	Tornado Warning	SHV	Columbia	46 min
Dec 18, 9:06 PM CST	Severe Thunderstorm Warning	SHV	Columbia	54 min
Dec 18, 11:24 PM CST	Severe Thunderstorm Warning	SHV	Union	66 min
Dec 19, 12:00 AM CST	Tornado Warning	SHV	Union	30 min
Dec 19, 1:16 AM CST	Flash Flood Warning	SHV	Union	4 hr
Dec 19, 2:10 AM CST	Severe Thunderstorm Warning	SHV	Union	35 min
Dec 18, 6:42 PM CST	Tornado Warning	SHV	Caddo	33 min
Dec 18, 7:15 PM CST	Tornado Warning	SHV	Bossier, Caddo	45 min
Dec 18, 8:50 PM CST	Severe Thunderstorm Warning	SHV	Webster	25 min
Dec 18, 9:14 PM CST	Flash Flood Warning	SHV	Bossier, Caddo	4 hr
Dec 19, 3:18 AM CST	Tornado Warning	SHV	Bienville, Lincoln	42 min
Dec 19, 3:53 AM CST	Tornado Warning	SHV	Bienville, Natchitoches	52 min
Dec 19, 4:18 AM CST	Tornado Warning	SHV	Jackson, Lincoln	42 min
Dec 19, 6:26 AM CST	Tornado Warning	SHV	Grant	64 min

Nearby

Flash Flood Warnings in Arkansas, 2002 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; radar from the NEXRAD Level II archive.