Alert archive / Texas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 21, NWS Lake Charles, LA

January 21, 1998Tyler County, Texas

NWS Lake Charles, LA issued this severe thunderstorm warning at Jan 21, 1998, 7:57 PM CST for Tyler County, Texas. It was in force for 58 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jan 21, 1998, 7:57 PM CST (01:57 UTC)
Expired: Jan 21, 1998, 8:55 PM CST
In force: 58 min
Issued by: NWS Lake Charles, LA
Area: Whole counties

County Tyler County, TX

The radar

The Lake Charles radar (KLCH), 132 km from the middle of the area, began a volume at 01:59 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.

What was reported inside it

Time	Report	Where	Remark
Jan 21, 8:15 PM CST	Hail 0.75	Woodville, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jan 21, 2:15 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 2.0 hours before the alert went out and 134 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: 1567 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 528 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 6.4

Open this sounding in Storm Lab

The text

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

190 
WUUS1 KLCH 220158 RRA
SVRLCH
TXC457-220255-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
757 PM CST WED JAN 21 1998

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES LA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 855 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEASTERN TEXAS

   ...TYLER COUNTY

AT 755 PM...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS
APPROACHING TYLER COUNTY FROM THE WEST AND SOUTHWEST.

THE STRONGEST STORM IS LOCATED 15 MILES SOUTHWEST OF
WOODVILLE...MOVING NORTHEAST AT 25 MPH.

LARGE HAIL IS THE PRIMARY THREAT.

THIS THUNDERSTORM IS CAPABLE OF PRODUCING VERY LARGE HAIL WHICH
COULD CAUSE SIGNIFICANT DAMAGE TO PROPERTY. TORRENTIAL RAIN
REDUCING VISIBILITIES TO NEAR ZERO WILL ALSO ACCOMPANY THIS STORM.
MOTORISTS CAUGHT ON THE OPEN ROAD SHOULD SLOW DOWN OR PULL OVER
UNTIL THE STORM HAS PASSED. DO NOT DRIVE INTO LOW-LYING AREAS WHERE
WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT FOR
YOUR TO CROSS SAFELY.


ERICKSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 6:33 PM CST	Severe Thunderstorm Warning	LCH	Newton	32 min
Jan 21, 8:50 PM CST	Severe Thunderstorm Warning	LCH	Jefferson	55 min
Jan 21, 9:11 PM CST	Tornado Warning	LCH	Jasper, Tyler	34 min
Jan 21, 9:44 PM CST	Severe Thunderstorm Warning	LCH	Jefferson	61 min
Jan 21, 9:46 PM CST	Severe Thunderstorm Warning	LCH	Newton	49 min
Jan 21, 10:32 PM CST	Severe Thunderstorm Warning	LCH	Orange	63 min
Jan 21, 10:53 PM CST	Flash Flood Warning	LCH	Jefferson	2 hr
Jan 21, 10:55 PM CST	Severe Thunderstorm Warning	LCH	Jefferson	65 min
Jan 21, 11:24 PM CST	Flash Flood Warning	LCH	Orange	2 hr
Jan 22, 1:53 AM CST	Flash Flood Warning	LCH	Jefferson	2 hr

Nearby

Severe Thunderstorm Warnings in Texas, 1998 Every severe thunderstorm warning in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.