Alert archive / Louisiana / Tornado Warnings in 1990

Tornado Warning 6, NWS Shreveport, LA

February 15, 1990Webster Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Feb 15, 1990, 3:00 PM CST for Webster Parish, Louisiana. It was in force for 75 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
Feb 15, 1990, 3:00 PM CST (21:00 UTC)
Expired
Feb 15, 1990, 4:15 PM CST
In force
75 min
Issued by
NWS Shreveport, LA
Area
Whole counties

County Webster Parish, LA

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
Feb 15, 3:15 PM CSTTornado F0Webster, LA

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, 9.0 hours before the alert went out and 125 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 12:00Z on 1990-02-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 342 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 1990-02-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 275 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
342 J/kg
Mixed-layer CIN
-171 J/kg
Mixed-layer LCL
1286 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
275 m²/s²
0-3 km storm-relative helicity
272 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Feb 15, 12:30 PM CST, 2 hours 30 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002-003-
004-005-006-151930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1225 PM CST THU FEB 15 1990

A TORNADO WATCH IS IN EFFECT FOR A LARGE AREA INCLUDING MUCH OF NORTH
LOUISIANA...SOUTHEAST ARKANSAS AND THE ADJACENT AREA OF MISSISSIPPI.

SEVERE STORMS WERE OVER SOUTHEAST LOUISIANA AND THE ADJACENT AERA OF
SOUTHWEST MISSISSIPPI...MOVING AWAY FROM THE ARKLATEX.

HOWEVER...A BAND OF STRONG THUNDERSTORMS WILL DEVELOP OVER SOUTH-
CENTRAL ARKANSAS ACROSSS NRTHWEST LOUISIANA AND EAST CENTRAL TEXAS
AND SPREAD EAST.  ALSO ISOLATED STRONG THUNDERSTORMS WILL DEVELOP
AHEAD OF THE BAND OVER NORTH LOUISIANA AND SOUTHEAST ARKANSAS.

THE THREAT OF SEVERE STORMS WILL INCREASE RAPIDLY BY MID AFTERNOON
INTO THE EVENING HOURS AS THE SYSTEM SPREADS EAST.
.
PERSONS IN NORTH LOUISIANA AND THE ADJACENT AREA ARE ADVISED
TO REMAIN ALERT...AS STORM WARNINGS WILL LIKLEY BE NECESSARY BY
MID AFTERNOON. THE THREAT OF SEVERE STORMS WILL INCREASE AS THIS
SYSTEM MOVES EAST.

AT 1230 PM CST...NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT INDICATED
SCATTERED SHOWERS ACROSS SOUTHWEST AND CENTRAL ARKANSAS FROM ASHDOWN AND
TEXARKANA EAST TO LITTLE ROCK AND PINE BLUFF.  ISOLATED SHOWERS AND
THUNDERSTORMS WERE OVER EAST TEXAS BETWEEN CENTER AND NACOGDOCHES.
MOVEMENT WAS EAST AND NORTHEAST AT AROUND 30 MILES AN HOUR.

STAY TUNED TO TV...RADIO AND NOAA WEATHER RADIO FOR THE zLATEST IN
WEATHER INFORMATION.
Special weather statement, Feb 15, 1:33 PM CST, 1 hour 27 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002-003-
004-005-006-152100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
130 PM CST THU FEB 15 1990

A TORNADO WATCH IS IN EFFECT FOR A LARGE AREA INCLUDING MUCH OF NORTH
LOUISIANA...SOUTHEAST ARKANSAS AND THE ADJACENT AREA OF MISSISSIPPI.

A BAND OF STRONG THUNDERSTORMS WERE DEVELOPIING AT 130 PM CST FROM NEAR
MAGNOLIA ARKANSAS TO NEAR SHREVEPORT TO NEAR NACOGDOCHES TEXAS.

THESE STORMS WERE INCREASING IN INTENSITY AND AREAL COVERAGE WHILE
MOVING NORTH NORTHEAST AT 40 MPH. THUS FAR...PEA SIZE HAIL AND HEAVY
RAINFALL AND STRONG GUSTY WINDS HAVE OCCURRED. STORMS WILL DEVELOP
AHEAD OF THE BAND OVER NORTH LOUISIANA AND SOUTHEAST ARKANSAS.

THE THREAT OF SEVERE STORMS WILL INCREASE RAPIDLY BY MID AFTERNOON
INTO THE EVENING HOURS AS THE SYSTEM SPREADS EAST.
.
PERSONS IN NORTH LOUISIANA AND THE ADJACENT AREA ARE ADVISED
TO REMAIN ALERT...AS STORM WARNINGS WILL LIKLEY BE NECESSARY BY
MID AFTERNOON. THE THREAT OF SEVERE STORMS WILL INCREASE AS THIS
SYSTEM MOVES EAST.

THE STORMS FROM SOUTH OF SHREVEPORT TO WEST OF CENTER TEXAS WILL LIKELY
PRODUCE HIGH WIND GUSTS AND HAIL SIZE MAY INCREASE WITHIN THE NEXT
HOUR AND SEVERE STORMS MAY DEVELOP.

NEW STORMS WERE DEVELOPING AHEAD OF THE BAND FROM 20 MILES SOUTHEAST OF
EL DORADO ARKANSAS TO NEAR HOMER LOUISIANA TO 20 MILES SOUTHWEST OF
RUSTON.

THESE STORMS WILL INCREASE RAPIDLY AND MAY REACH SEVERE INTENSITY
WITHIN THE NEXT HOUR OR SO.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 15, 1:43 PM CSTSevere Thunderstorm WarningSHVBossier, Caddo, Webster77 min
Feb 15, 1:43 PM CSTSevere Thunderstorm WarningSHVDe Soto77 min
Feb 15, 2:13 PM CSTTornado WarningSHVDe Soto62 min
Feb 15, 2:15 PM CSTSevere Thunderstorm WarningSHVClaiborne60 min
Feb 15, 2:38 PM CSTTornado WarningSHVBienville, Claiborne, Lincoln67 min
Feb 15, 3:00 PM CSTTornado WarningSHVUnion75 min
Feb 15, 4:15 PM CSTSevere Thunderstorm WarningSHVMorehouse, Union60 min
Feb 15, 4:15 PM CSTSevere Thunderstorm WarningSHVLincoln60 min
Feb 15, 5:35 PM CSTSevere Thunderstorm WarningSHVMorehouse, Ouachita, Richland70 min

Nearby

Tornado Warnings in Louisiana, 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.