Alert archive / Texas / Tornado Warnings in 1990

Tornado Warning 8, NWS Lake Charles, LA

April 27, 1990San Augustine County, Texas

NWS Lake Charles, LA issued this tornado warning at Apr 27, 1990, 7:15 PM CDT for San Augustine County, Texas. It was in force for 30 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
Apr 27, 1990, 7:15 PM CDT (00:15 UTC)
Expired
Apr 27, 1990, 7:45 PM CDT
In force
30 min
Issued by
NWS Lake Charles, LA
Area
Whole counties

County San Augustine County, TX

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Apr 27, 7:35 PM CDTTornado F1San Augustine, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Longview/Gregg, TX (KGGG), launched 00:00Z, 0.3 hours before the alert went out and 114 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-pSkew-T log-p diagram, Longview/Gregg, TX at 00:00Z on 1990-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1368 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Longview/Gregg, TX at 00:00Z on 1990-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1368 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
1155 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBPT 280015
TORBPT
TXC405-280045-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE PORT ARTHUR TX
715 PM CDT FRI APR 27 1990
 
THE NATIONAL WEATHER SERVICE IN PORT ARTHUR HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  745 PM CDT
FOR PERSONS IN THE FOLLOWING COUNTIES
 
IN NORTHEAST TEXAS
 
   ...SOUTHERN SAN AUGUSTINE COUNTY
 
AT 712 PM CDT...WEATHER RADAR SHOWED A POSSIBLE TORNADO OVER LAKE
RAYBURN EAST OF ZAVALA MOVING EAST AT 20 MPWH.
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH
OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
 
NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 7:18 PM CDTSevere Thunderstorm WarningLCHJasper27 min
Apr 27, 7:49 PM CDTSevere Thunderstorm WarningLCHJasper, Newton, Sabine26 min
Apr 27, 7:49 PM CDTSevere Thunderstorm WarningLCHTyler26 min
Apr 27, 8:14 PM CDTTornado WarningLCHJasper31 min
Apr 27, 9:50 PM CDTSevere Thunderstorm WarningLCHHardin, Jefferson40 min
Apr 27, 11:45 PM CDTSevere Thunderstorm WarningLCHOrange30 min

Nearby

Tornado Warnings in Texas, 1990Every tornado warning in 1990Tornadoes in 1990

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.