Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 2, NWS Shreveport, LA

January 24, 1987Webster Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Jan 24, 1987, 8:30 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
Jan 24, 1987, 8:30 PM CST (02:30 UTC)
Expired
Jan 24, 1987, 9:45 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
Jan 24, 8:52 PM CSTHail 1Webster, 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 00:00Z, 2.5 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 00:00Z on 1987-01-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 380 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 00:00Z on 1987-01-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 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
380 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
1556 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
172 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

000 
WTAA00 KSHV 250242
SVRSHV
LAC069-127-017-015-119-250345-

BULLETIN...IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
830PM CST SAT JAN 25 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 945 PM CST   FOR PEOPLE IN THE FOLLOWING COUNTIES AND
PARISHES IN

NORTH LOUISIANA...CADDO..BOSSIER...WEBSTER...WINN..NATCHITOCHES.

AT 830 PM CST THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT WAS
SHOWING A LINE OF STRONG THUNDERSTORMS FROM NEAR PRESCOTT ARKANSAS
TO NEAR MAGNOLIA TO SHREVEPORT TO NEAR LONGANSPORT LOUISIANA TO NEAR
LUFKIN TEXAS.

LARGE HAIL UP TO NEAR ONE INCH IN DIAMETER ALONG WITH HIGH WINDS OF
GREATER THAN 60 MPH ARE LIKELY WITH SEVERE THUNDERSTORMS INDICATED
NEAR SHREVEPORT...SOUTHWEST OF NATCHITOCHES AND NORTHWEST OF WINNFIELD
LOUISIANA...MOVMENT OF THE STORMS WAS TOWARD THE EAST NORTHEAST AT
35 MPH.

What forecasters said that day

The local office's own words before this severe thunderstorm 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, Jan 24, 6:09 PM CST, 2 hours 21 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
605 PM CST SAT JAN 24 1987

SHOWERS AND THUNDERSTORMS DEVELOP OVER THE ARKLATEX

THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT AT 6PM WAS
SHOWING AN AREA OF SCATTERED SHOWERS AND THUNDERSTORMS FROM
NEAR NACOGDOCHES AND LUFKIN TEXAS NORTHEASTWARD ACROSS NORTHERN
TOLEDO BEND LAKE INTO NORTHERN LOUISIANA NEAR MANSFIELD AND
COUSHATTA LOUISIANA.

ANOTHER AREA OF SHOWERS AND THUNDERSTORMS WAS LOCATED FROM
JUST NORTH OF LONGVIEW THROUGH THE TEXARKANA AREA TO NEAR
NASHVILLE AND ARKADELPHIA ARKANSAS.

MOVEMENT WAS TO THE NORTHEAST NEAR 25 MPH.

SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TO AFFECT PORTIONS
OF NORTHEAST TEXAS...SOUTHWEST ARKANSAS AND NORTHERN LOUISIANA THIS
EVENING.  SOME OF THE THUNDERSTORMS WILL PRODUCE BRIEF PERIODS
OF HEAVY RAIN AND STRONG GUSTY WINDS.
Special weather statement, Jan 24, 7:38 PM CST, 52 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
735 PM CST SAT JAN 24 1987

HEAVY THUNDERSTORMS CONTINUE TO MOVE ACROSS THE ARKLATEX

THE SHREVEPORT WEATHER RADAR AT 7:30 PM SHOWED A BAND OF
HEAVY THUNDERSTORMS CROM 25 MILES NORTHEAST OF TEXARKANA
ARKANSAS TO 20 MILES EAST OF LONGVIEW TEXAS.

ANOTHER BAND OF HEAVY THUNDERSTORMS WAS LOCATED FROM NEAR
CENTER TEXAS NORTHEASTWARD TO 15 MILES SOUTHEAST OF RUSTON
LOUISIANA.

THESE THUNDERSTORMS ARE PRODUCING HEAVY RAIN...FREQUENT
LIGHTNING...STRONG GUSTY WINDS AND SMALL HAIL.  THE
COOPERATIVE OBSERVER IN CENTER TEXAS REPORTS SMALL HAIL
COVERING THE GROUND IN CENTER AT 7:20 PM.  REPORTS OF MARBLE
SIZE HAIL WERE ALSO RECEIVED FROM SOUTHERN NEVADA COUNTY ARKANSAS.

SHOWERS AND HEAVY THUNDERSTORMS WILL CONTINUE TO AFFECT PORTIONS
OF NORTHEAST TEXAS...SOUTHWEST ARKANSAS AND NORTHERN LOUISIANA
TONIGHT WITH SOME OF THE STORMS PRODUCING HEAVY RAIN...STRONG
WINDS.t..FREQUENT LIGHTNING AND HAIL.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 24, 8:30 PM CSTSevere Thunderstorm WarningSHVBossier, Caddo75 min
Jan 24, 8:30 PM CSTSevere Thunderstorm WarningSHVNatchitoches, Winn75 min
Jan 24, 8:50 PM CSTSevere Thunderstorm WarningSHVDe Soto70 min
Jan 24, 9:05 PM CSTSevere Thunderstorm WarningSHVClaiborne70 min
Jan 24, 9:35 PM CSTSevere Thunderstorm WarningSHVDe Soto, Sabine75 min
Jan 24, 9:35 PM CSTSevere Thunderstorm WarningSHVBienville, Lincoln, Union75 min
Jan 24, 9:35 PM CSTSevere Thunderstorm WarningSHVRed River75 min
Jan 24, 10:25 PM CSTSevere Thunderstorm WarningSHVJackson, Natchitoches, Winn65 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1987Every severe thunderstorm warning in 1987

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.