Alert archive / Texas / Tornado Warnings in 1990

Tornado Warning 15, NWS Lake Charles, LA

May 12, 1990Nacogdoches County, Texas

NWS Lake Charles, LA issued this tornado warning at May 12, 1990, 7:14 PM CDT for Nacogdoches County, Texas. It was in force for 61 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
May 12, 1990, 7:14 PM CDT (00:14 UTC)
Expired
May 12, 1990, 8:15 PM CDT
In force
61 min
Issued by
NWS Lake Charles, LA
Area
Whole counties

County Nacogdoches 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
May 12, 7:55 PM CDTHail 1.75Nacogdoches, 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, 0.2 hours before the alert went out and 82 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 1990-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1990-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -173 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2029 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
-173 m²/s²
0-3 km storm-relative helicity
-69 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBPT 130014
TORBPT
TXC347-130115-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE PORT ARTHUR TX
714 PM CDT SAT MAY 12 1990
 
THE NATIONAL WEATHER SERVICE IN PORT ARTHUR HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  815 PM CDT
FOR PERSONS IN THE FOLLOWING COUNTIES
 
IN NORTHEAST TEXAS
 
   ...NACOGDOCHES COUNTY
 
THE SEVERE THUNDERSTORM WARNING ISSUED EARLIER FOR NACOGDOCHES COUNTY
HAS BEEN UPGRADED TO A TORNADO WARNING.
 
AT 710 PM THIS EVENING...WEATHER RADAR SHOWED A POSSIBLE TORNADO NEAR
DOUGLASS IN WEST CENTRAL NACOGDOCHES COUNTY MOVING EAST-SOUTHEAST AT
40 MILES AN HOUR.
 
THIS STORM IS MOVING TOWARDS THE CITY OF NACOGDOCHES AND SHOULD MOVE
INTO THE MAIN CITY AROUND 740 PM.
 
DCG
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
 
NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 8:21 PM CDTSevere Thunderstorm WarningLCHSan Augustine69 min
May 12, 9:24 PM CDTSevere Thunderstorm WarningLCHJasper, Tyler66 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.