Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 2, NWS Shreveport, LA
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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 24, 8:52 PM CST | Hail 1 | Webster, 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.
- 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
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 24, 8:30 PM CST | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 75 min |
| Jan 24, 8:30 PM CST | Severe Thunderstorm Warning | SHV | Natchitoches, Winn | 75 min |
| Jan 24, 8:50 PM CST | Severe Thunderstorm Warning | SHV | De Soto | 70 min |
| Jan 24, 9:05 PM CST | Severe Thunderstorm Warning | SHV | Claiborne | 70 min |
| Jan 24, 9:35 PM CST | Severe Thunderstorm Warning | SHV | De Soto, Sabine | 75 min |
| Jan 24, 9:35 PM CST | Severe Thunderstorm Warning | SHV | Bienville, Lincoln, Union | 75 min |
| Jan 24, 9:35 PM CST | Severe Thunderstorm Warning | SHV | Red River | 75 min |
| Jan 24, 10:25 PM CST | Severe Thunderstorm Warning | SHV | Jackson, Natchitoches, Winn | 65 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.