Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 252, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at May 5, 1999, 7:12 PM CDT for Sabine Parish, Louisiana. It was in force for 48 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 5, 1999, 7:12 PM CDT (00:12 UTC)
- Expired
- May 5, 1999, 8:00 PM CDT
- In force
- 48 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
County Sabine Parish, LA
The radar
The Ft Polk radar (KPOE), 71 km from the middle of the area, began a volume at 00:11 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 5, 7:25 PM CDT | Hail 1 | Zwolle, 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 5, 2:45 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 0.2 hours before the alert went out and 104 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
- 477 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1683 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- -115 m²/s²
- 0-3 km storm-relative helicity
- -20 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -3.8
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KSHV 060013 RRA SVRSHV LAC085-060100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 712 PM CDT WED MAY 5 1999 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SABINE PARISH IN WESTERN LOUISIANA * UNTIL 800 PM CDT * AT 710 PM CDT...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTHWEST OF ZWOLLE. THE THUNDERSTORM WAS MOVING NORTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ZWOLLE BY 720 PM A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. THIS THUNDERSTORM WILL PRODUCE LARGE HAIL. DO NOT REMAIN OUTSIDE... HEAD FOR A STRONG BUILDING.
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.
NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 5, 2:45 PM CDT, 4 hours 27 minutes earlier.
Area forecast discussion, May 5, 2:45 PM CDT, 4 hours 27 minutes before
FORECAST DISCUSSION NATIONAL WEATHER SERVICE SHREVEPORT LA 245 PM CDT WED MAY 5 1999 ZIPPY SEVERE STORMS STARTING ALONG DRYLINE. FRONTAL BOUNDARY ALSO SEEN ALONG RED RIVER OF NORTH TEXAS. DON/T THINK A SECOND ROUND IS IN STORE ALONG FRONT...SO WILL FOCUS MAINLY ON DRYLINE. BEHIND DRYLINE WILL KEEP A FEW LOW POPS BUT WON/T JUMP THROUGH HOOPS. DRY FORECAST FOR THURSDAY THROUGH FRIDAY. DRYLINE CURRENTLY ON DOORSTEP OF TXK/GGG. RAPIDLY DEVELOPING SQUALL LINE APPROACHING SHV. WILL FINISH UP EXTENDED A LITTLE LATER...WILL ISSUE SHADOWS EARLY IN ORDER TO JUMP BACK INTO THE SEVERE WEATHER FRYING PAN. GUIDANCE TEMPS NOT TOO BAD. SHV 57/80/54/80 5000 MLU 59/82/55/80 7000 TXK 53/76/50/77 2000 TYR 53/78/51/80 0000 LFK 56/82/54/82 5000 17
In the hours before
Local storm report, May 5, 4:05 PM CDT, 3 hours 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
405 PM CDT WED MAY 5 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....PARISH/COUNTY LOCATION....
0210 PM 5 NW NACOGDOCHES TX 1.75 INCH HAIL
05/05/99 NACOGDOCHES REPORTED BY SPOTTER
0230 PM DOTSON TX 0.75 INCH HAIL
05/05/99 PANOLA REPORTED BY SPOTTER
0240 PM 7 ESE BRADLEY AR 1.00 INCH HAIL
05/05/99 LAFAYETTE REPORTED BY SHERIFFS
OFFICE
0245 PM BLANCHARD LA 0.50 INCH HAIL
05/05/99 CADDO REPORTED BY SPOTTER
0249 PM 8 N SHREVEPORT LA 1.75 INCH HAIL
05/05/99 CADDO REPORTED BY SHERIFFS
OFFICE
0257 PM TAYLOR AR 50 MPH TSTM GUST
05/05/99 COLUMBIA REPORTED BY EMERGENCY
MANAGER
0308 PM 8 E CARTHAGE TX 0.75 INCH HAIL
05/05/99 PANOLA REPORTED BY SPOTTER
0326 PM 5 SW SHREVEPORT RGNL ARP LA 0.75 INCH HAIL
05/05/99 CADDO REPORTED BY NWS EMPLOYEE
0330 PM 5 SE SHREVEPORT RGNL ARP LA 0.50 INCH HAIL
05/05/99 CADDO REPORTED BY PUBLIC
0330 PM 7 SE SHREVEPORT LA 1.75 INCH HAIL
05/05/99 CADDO REPORTED BY SPOTTER
0335 PM 8 SE SHREVEPORT LA 1.00 INCH HAIL
05/05/99 CADDO REPORTED BY PUBLIC
0339 PM BOSSIER CITY LA 0.75 INCH HAIL
05/05/99 BOSSIER REPORTED BY SPOTTER
0342 PM SHREVEPORT LA 0.75 INCH HAIL
05/05/99 CADDO REPORTED BY PUBLIC
0344 PM SHREVEPORT LA 1.75 INCH HAIL
05/05/99 CADDO REPORTED BY TV STATIONLocal storm report, May 5, 4:44 PM CDT, 2 hours 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
444 PM CDT WED MAY 05 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....PARISH/COUNTY LOCATION....
0250 PM 1 S TAYLOR AR .75 INCH HAIL
05/05/99 COLUMBIA REPORTED BY SPOTTER.
0300 PM 2 S CARTHAGE TX .75 INCH HAIL
05/05/99 PANOLA AT INTERSECTION OF HWY 59
AND HWY 2517. REPORTED BY
LAW ENFORCEMENT.
0342 PM BOSSIER CITY LA 1.75 INCH HAIL
05/05/99 BOSSIER REPORTED BY SPOTTER.
0348 PM BOSSIER CITY LA 1 INCH HAIL
05/05/99 BOSSIER REPORTED BY SPOTTER.
0407 PM GRAND CANE LA 1 INCH HAIL
05/05/99 DE SOTO REPORTED BY SPOTTER.
20Local storm report, May 5, 5:41 PM CDT, 1 hour 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
541 PM CDT WED MAY 05 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....PARISH/COUNTY LOCATION....
0225 PM 1 W NACOGDOCHES TX 1 INCH HAIL
05/05/99 NACOGDOCHES REPORTED BY LAW
ENFORCEMENT.
0240 PM GARRISON TX 1 INCH HAIL
05/05/99 NACOGDOCHES REPORTED BY LAW
ENFORCEMENT.
0437 PM SUMMERFIELD LA .75 INCH HAIL
05/05/99 CLAIBORNE REPORTED BY SPOTTER.
0440 PM 4 SW SIBLEY LA .5 INCH HAIL
05/05/99 WEBSTER OCCURRING ON LAKE
BISTINEAU. REPORTED BY
BROADCAST MEDIA.
20The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 7:37 PM CDT | Severe Thunderstorm Warning | SHV | Caldwell | 48 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1999Every severe thunderstorm warning in 1999
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; radar from the NEXRAD Level II archive.