Alert archive / Texas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 13, NWS Lake Charles, LA

February 27, 1999Newton County, Texas

NWS Lake Charles, LA issued this severe thunderstorm warning at Feb 27, 1999, 2:30 PM CST for Newton County, Texas. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 27, 1999, 2:30 PM CST (20:30 UTC)
Expired: Feb 27, 1999, 3:30 PM CST
In force: 60 min
Issued by: NWS Lake Charles, LA
Area: Whole counties

County Newton County, TX

The radar

The Ft Polk radar (KPOE), 84 km from the middle of the area, began a volume at 20:29 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
Feb 27, 1:15 PM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.5 hours before the alert went out and 91 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: 520 J/kg
Mixed-layer CIN: -134 J/kg
Mixed-layer LCL: 657 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 215 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLCH 272030 RRA
SVRLCH
TXC351-272130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
230 PM CST SAT FEB 27 1999

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NEWTON COUNTY IN SOUTHEASTERN TEXAS

* UNTIL 330 PM CST

* AT 226 PM CST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A SEVERE THUNDERSTORM 13 MILES NORTHEAST OF JASPER OR 10 MILES
  WEST OF MAYFLOWER MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR
  MAYFLOWER BY 235 PM CST


SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING AND TORRENTIAL RAIN. FOR
YOUR PROTECTION...S~EEK SHELTER IN A STRONG BUILDING. STAY AWAY
FROM WINDOWS AND AVOID USING TELEPHONES...COMPUTERS OR OTHER
ELECTRICAL EQUIPMENT UNTIL THE STORM HAS PASSED.

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 Feb 27, 2:19 PM CST, 11 minutes earlier.

Area forecast discussion, Feb 27, 2:19 PM CST, 11 minutes before

SOUTHWEST...CENTRAL LOUISIANA AND SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
219 PM CST SAT FEB 27 1999

AT 20Z...SFC COLD FRONT WAS NEAR A STL-TXK-HDO LINE. ALL THE MODELS
CONTINUE TO HANDLE THIS FEATURE IN A SIMILAR MANNER WITH THE
FRONT NEAR THE SABINE RIVER BY 01Z SUN AND EXITING THE EASTERN
EXTREMES OF THE CWA BY 08Z. SVR TSRA WATCH FOR PORTIONS OF THE
FA UNTIL 700 PM. THE MAIN THREAT FROM THE THUNDERSTORMS WILL
BE LARGE HAIL AND DAMAGING WINDS. WIND PROFILE IS GENERALLY
UNIDIRECTIONAL AND DO NOT EXPECT ANY ROTATING THUNDERSTORMS.
THE THREAT FOR SVR WX WILL END WITH THE PASSAGE OF THE COLD FRONT.

CLOUDS SHOULD CLEAR OUT FAIRLY QUICKLY AFTER FROPA. SO...I WILL
GO WITH CLEARING SKIES LATE TONIGHT. SUNDAY AND MONDAY...SKIES
WILL BE MOSTLY SUNNY(CLEAR) WITH HIGH PRESSURE BUILDING AT THE
SFC AND ALOFT.

WILL GO WITH A BLEND OF AVN AND NGM TEMPS.

LCH 48/70/46/73 6(EARLY)000
LFT 49/70/46/72 6(EARLY)000
BPT 47/72/47/73 5(EARLY)000
AEX 45/70/44/71 6(EARLY)000

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 2:38 PM CST	Severe Thunderstorm Warning	LCH	Tyler	62 min
Feb 27, 3:03 PM CST	Severe Thunderstorm Warning	LCH	Jasper	62 min
Feb 27, 3:37 PM CST	Severe Thunderstorm Warning	LCH	Newton	63 min
Feb 27, 3:44 PM CST	Severe Thunderstorm Warning	LCH	Jefferson	66 min
Feb 27, 4:13 PM CST	Severe Thunderstorm Warning	LCH	Orange	62 min

Nearby

Severe Thunderstorm Warnings in Texas, 1999 Every severe thunderstorm warning in 1999

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.