Alert archive / Texas / Tornado Warnings in 1990

Tornado Warning 25, NWS Shreveport, LA

May 30, 1990Cass County, Texas

NWS Shreveport, LA issued this tornado warning at May 30, 1990, 6:15 PM CDT for Cass County, Texas. It was in force for 60 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 30, 1990, 6:15 PM CDT (23:15 UTC)
Expired: May 30, 1990, 7:15 PM CDT
In force: 60 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Cass 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

Time	Report	Where	Remark
May 30, 6:30 PM CDT	Tornado F2	Cass, TX
May 30, 6:55 PM CDT	Tornado F2	Cass, 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 12:00Z, 11.3 hours before the alert went out and 84 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: 113 J/kg
Mixed-layer CIN: -237 J/kg
Mixed-layer LCL: 840 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 302 m²/s²
0-3 km storm-relative helicity: 373 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSHV 302315
TORSHV
TXC067-310015-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
615 PM CDT WED MAY 30 1990
 
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  715 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS..
 
IN NORTHEAST TEXAS
 
   ...CASS COUNTY
 
AT 615 WEATHER RADAR SHOWED A POSSIBLE TORNADO ABOUT 5 MILES SOUTHEAST
OF HUGH SPRINGS TEXAS MOVING EAST AT 25 MPH.
 
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, May 30, 4:44 PM CDT, 1 hour 31 minutes before

OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002-
003-004-005-006-310000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
445 PM CDT WED MAY 30 1990

...TORNADO WATCH IN EFFECT UNTIL 10 PM FOR SOUTHEAST OKLAHOMA AND
EXTREME NORTHEAST TEXAS...

...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE OVER SOUTH ARKANSAS AND
ARE DEVELOPING OVER SOUTHEAST OKLAHOMA AND EAST TEXAS...

AT 440 PM WEATHER SERVICE RADAR SHOWED SCATTERED SHOWERS AND A FEW
THUNDERSTORMS OVER SOUTH ARKANSAS NORTH OF A LINE FROM TEXARKANA TO
EL DORADO. ALSO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WERE
DEVELOPING OVER SOUTHEAST OKLAHOMA AND EAST TEXAS. MOVEMENT WAS
TO THE NORTHEAST AT 35 MPH.

SOME OF THESE STORMS MAY BECOME SEVERE THIS EVENING AND TONIGHT OVER
THE NORTHWEST PART OF THE ARKALTEX AND PRODUCE HEAVY RAIN..HAIL..
STRONG GUSTY WINDS AND POSSIBLY TORNADOES.

PERSONS SHOULD STAY TUNED TO RADIO..TELEVISION OR NOAA WEATHER
RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 5:37 PM CDT	Severe Thunderstorm Warning	SHV	Harrison	68 min
May 30, 5:46 PM CDT	Severe Thunderstorm Warning	SHV	Cass	59 min
May 30, 6:12 PM CDT	Severe Thunderstorm Warning	SHV	Marion	63 min
May 30, 6:43 PM CDT	Tornado Warning	SHV	Cass	92 min
May 30, 6:43 PM CDT	Tornado Warning	SHV	Harrison, Marion	92 min
May 30, 6:48 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Rusk	87 min

Nearby

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