Alert archive / Louisiana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 158, NWS Lake Charles, LA

November 28, 2001Rapides Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Nov 28, 2001, 1:47 PM CST for Rapides Parish, Louisiana. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Nov 28, 2001, 1:47 PM CST (19:47 UTC)
Expired: Nov 28, 2001, 2:45 PM CST
In force: 58 min
Issued by: NWS Lake Charles, LA
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Rapides Parish, LA

The radar

The Ft Polk radar (KPOE), 53 km from the middle of the area, began a volume at 19:46 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Nov 28, 11:00 AM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.8 hours before the alert went out and 154 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: 1980 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 487 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 2.9
Supercell composite: 10.6

Open this sounding in Storm Lab

The text

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

406 
WUUS54 KLCH 281947
SVRLCH
LAC079-282045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
147 PM CST WED NOV 28 2001

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  RAPIDES PARISH IN CENTRAL LOUISIANA

* UNTIL 245 PM CST

* AT 140 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES SOUTHWEST OF ALEXANDRIA...MOVING
  NORTHEAST AT 25 MPH.

* THIS STORM WILL BE NEAR...
  ALEXANDRIA BY 200 PM CST
  PINEVILLE BY 215 PM CST
  BALL BY 225 PM CST

SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MPH...DESTRUCTIVE
HAIL...DEADLY LIGHTNING AND TORRENTIAL RAIN.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CST WEDNESDAY
AFTERNOON FOR SOUTHWESTERN LOUISIANA.

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

LAT...LON 3125 9272 3112 9257 3148 9207 3167 9229

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lake Charles, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Nov 28, 11:42 AM CST, 2 hours 5 minutes earlier.

Area forecast discussion, Nov 28, 11:42 AM CST, 2 hours 5 minutes before

SOUTHWEST LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1142 AM CST WED NOV 28 2001

.UPDATE...
A TORNADO WATCH IS NOW IN EFFECT FOR SOUTHWEST...SOUTH CENTRAL...AND
CENTRAL LOUISIANA UNTIL 1600 CST. ALSO...URBAN AND SMALL STREAM
ADVISORY WILL BE ISSUED FOR EXTREME SOUTHWEST AND WEST CENTRAL
LOUISIANA.

.PUBLIC FORECAST...
CURRENT LAPS ANALYSIS DEPICTS A THETA-E MAXIMUM ACROSS SOUTH CENTRAL
LOUISIANA...WITH A CONCENTRATED GRADIENT REGION EXTENDING ALONG AN
AXIS FROM ORANGE THROUGH MERRYVILLE THROUGH MARKSVILLE. BELIEVE
HEAVIEST RAINFALL WILL FOCUS WITHIN THIS GRADIENT REGION...AS A DEEP
GULF AIR MASS CONTINUES TO OVER-GLIDE THE COOL SURFACE LAYER.

THE MORNING LAKE CHARLES SOUNDING DEPICTS HEAVY WATER LOADING WITHIN
THE LOWER AND MID TROPOSPHERE...SHOULD ENCOURAGE HEAVY RAINS AND
DISCOURAGE SEVERE WEATHER. THE EXCEPTION IS ACROSS SOUTH CENTRAL
LOUISIANA...WHERE THE COMBINATION OF A THETA-E MAXIMUM...1000-500 M-
BAR THICKNESS DIFLUENCE...STRONG OMEGAS (ABOUT 8 U-BARS PER SECOND)
AND LARGE SURFACE BASED CAPES (2000 JOULES PER KG) WILL CREATE A
SOMEWHAT FRIENDLY ENVIRONMENT FOR SEVERE STORMS.

.RIVERS...
MOST RIVERS ACROSS SOUTHEAST TEXAS AND SOUTHWEST LOUISIANA ARE AT OR
NEAR BASEFLOW CONDITIONS. WITH A MAP (MEAN AREAL PRECIPITATION)
BETWEEN 2 AND 3 INCHES LIKELY ACROSS THE ENTIRE FORECAST AREA...MANY
RIVERS WILL BE NEAR OR ABOVE FLOOD STAGE FOR THE NEXT COUPLE OF DAYS.
NOTE...CONVECTION CELL TRAINING COULD ADD AN ADDITIONAL 2 INCHES OVER
THE MAP ESTIMATES.

.PREVAILING NUMBERS...
AEX 55/45/50/34/58/38 +98000
BPT 60/49/52/37/60/42 +95000
LCH 72/52/55/36/59/41 +97000
LFT 77/57/59/37/58/41 898000

.LCH...FLOOD WATCH TODAY...ENTIRE FORECAST AREA
       TORNADO WATCH TODAY FOR SOUTHWEST...SOUTH CENTRAL
       AND CENTRAL LOUISIANA

TRARES

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 27, 11:03 PM CST	Severe Thunderstorm Warning	LCH	Beauregard	57 min
Nov 27, 11:14 PM CST	Special Marine Warning	LCH		2 hr
Nov 27, 11:14 PM CST	Special Marine Warning	LCH		2 hr
Nov 28, 1:12 AM CST	Special Marine Warning	LCH		63 min
Nov 28, 1:12 AM CST	Special Marine Warning	LCH		63 min
Nov 28, 2:10 AM CST	Special Marine Warning	LCH		65 min
Nov 28, 3:36 AM CST	Severe Thunderstorm Warning	LCH	Cameron	54 min
Nov 28, 4:24 AM CST	Tornado Warning	LCH	Cameron	36 min
Nov 28, 4:37 AM CST	Tornado Warning	LCH	Calcasieu	53 min
Nov 28, 10:37 AM CST	Tornado Warning	LCH	Beauregard, Calcasieu	53 min
Nov 28, 1:29 PM CST	Special Marine Warning	LCH		61 min
Nov 28, 3:10 PM CST	Severe Thunderstorm Warning	LCH	Calcasieu	65 min
Nov 28, 3:53 PM CST	Severe Thunderstorm Warning	LCH	Allen, Jefferson Davis	67 min
Nov 28, 4:54 PM CST	Severe Thunderstorm Warning	LCH	Rapides	66 min
Nov 28, 5:28 PM CST	Severe Thunderstorm Warning	LCH	Beauregard	62 min
Nov 28, 5:48 PM CST	Special Marine Warning	LCH		57 min
Nov 28, 5:48 PM CST	Special Marine Warning	LCH		57 min
Nov 28, 5:48 PM CST	Special Marine Warning	LCH		57 min
Nov 28, 5:48 PM CST	Special Marine Warning	LCH		57 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2001 Every severe thunderstorm warning in 2001

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.