Alert archive / Texas / Tornado Warnings in 1999

Tornado Warning 49, NWS Lake Charles, LA

May 10, 1999Jasper County, Texas

NWS Lake Charles, LA issued this tornado warning at May 10, 1999, 8:04 AM CDT for Jasper County, Texas. It was in force for 61 min. 2 reports 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: May 10, 1999, 8:04 AM CDT (13:04 UTC)
Expired: May 10, 1999, 9:05 AM CDT
In force: 61 min
Issued by: NWS Lake Charles, LA
Area: Whole counties

County Jasper County, TX

The radar

The Lake Charles radar (KLCH), 104 km from the middle of the area, began a volume at 13:12 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
May 10, 8:05 AM CDT	Tornado F0	Jasper, TX
May 10, 8:10 AM CDT	Tornado F1	Buna, 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
May 10, 7:45 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.1 hours before the alert went out and 105 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: 1626 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 624 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLCH 101304 RRA
TORLCH
TXC241-101405-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
804 AM CDT MON MAY 10 1999

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* TORNADO WARNING FOR...
  JASPER COUNTY IN SOUTHEASTERN TEXAS

* UNTIL 905 AM CDT

* AT 800 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A TORNADO 14 MILES WEST OF JASPER MOVING EAST AT 35
  MPH.

* THE TORNADIC THUNDERSTORM WILL BE NEAR
  JASPER BY 815 AM CDT
  HOLLY SPRINGS BY 825 AM CDT

THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. GO TO A
SMALL INTERIOR ROOM ON THE LOWEST FLOOR. AVOID WINDOWS AND
DOORS. ABANDON CARS AND MOBILE HOMES FOR A STURDIER BUILDING
OR GET 2INTO A DITCH OR CULVERT.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 7:15 AM CDT	Severe Thunderstorm Warning	LCH	Hardin, Jefferson	60 min
May 10, 7:15 AM CDT	Severe Thunderstorm Warning	LCH	Tyler	60 min
May 10, 7:46 AM CDT	Tornado Warning	LCH	Tyler	49 min
May 10, 7:50 AM CDT	Tornado Warning	LCH	Hardin	50 min
May 10, 8:11 AM CDT	Severe Thunderstorm Warning	LCH	Jefferson, Newton, Orange	59 min
May 10, 8:15 AM CDT	Tornado Warning	LCH	Orange	65 min
May 10, 8:31 AM CDT	Tornado Warning	LCH	Newton	49 min

Nearby

Tornado Warnings in Texas, 1999 Every tornado warning in 1999 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.